Patent Description:
Recently, an apparatus such as an illumination apparatus or an image display apparatus that includes a collection of multiple light emitting diodes (LEDs) has become widespread. For example, proposed is an LED display in which each of pixels includes three LEDs emitting respective pieces of light of red (R), green (G), and blue (B), and such pixels are disposed in a two-dimensional matrix. Proposed in addition is a color-conversion LED display in which a light source of the LED display includes a single-color LED array and phosphors emitting light of mutually different fluorescent colors are disposed cyclically on the single-color LED array (for example PTL <NUM>). <CIT> and <CIT> disclose light emitting devices according to the prior art.

Incidentally, in a color-conversion light emitting device, in a case where LEDs are reduced in size and a gap between mutually adjacent LEDs is reduced to increase a definition of pixels, light emitted from an LED enters a phosphor disposed at a position opposed to an adjacent LED, which easily causes optical crosstalk that causes the phosphor to emit light. In a case where such optical crosstalk occurs, color reproducibility is lowered. Accordingly, it is desirable to provide a light emitting device and a display apparatus that make it possible to suppress optical crosstalk.

A light emitting device according to an aspect of the present disclosure includes multiple light emitting elements. The light emitting elements each include a semiconductor layer including a first conductive layer, a light emitting layer, and a second conductive layer that are stacked in this order. The first conductive layer has a light emitting surface. The light emitting elements further includes a first electrode in contact with the second conductive layer, and a second electrode in contact with the first conductive layer. The light emitting elements each emit light from the light emitting layer via the light emitting surface. The light emitting elements share the first conductive layer and the second electrode with each other. The light emitting elements each include a current path in the first conductive layer from a portion opposed to the first electrode to a portion opposed to the second electrode. The first conductive layer has one or multiple trenches in a region between two current paths adjacent to each other. The light emitting device further includes a light blocking section provided in the one or multiple trenches.

A display apparatus according to an aspect of the present disclosure includes multiple pixels each including multiple light emitting elements. The light emitting elements each have the same configuration as the above-described light emitting element. The pixels each further include a light blocking section provided in the one or multiple trenches.

In the light emitting device and the display apparatus according to the aspect of the present disclosure, the first conductive layer is provided with the one or multiple trenches in the region between the two current paths adjacent to each other, and the light blocking section is provided in the one or multiple trenches. This makes it possible to reduce, by the light blocking section, leakage of the light emitted from the light emitting layer into the first conductive layer of the adjacent light emitting element while securing the current path in each of the light emitting elements.

In the following, some embodiments of the present disclosure are described in detail with reference to the drawings. The following describes specific examples of the present disclosure, and the present disclosure is not limited to the following embodiments. In addition, the present disclosure is not limited to arrangements, dimensions, dimensional ratios, and the like of components illustrated in the drawings. It is to be noted that the description is given in the following order.

An example in which pieces of light having three respective colors are obtained from light emitting elements each emitting blue light.

A description is given of a display apparatus <NUM> according to an embodiment of the present disclosure. <FIG> is a perspective view of an example of an outline configuration of the display apparatus <NUM> according to the present embodiment. The display apparatus <NUM> is a so-called LED display and uses LEDs for display pixels. For example, as illustrated in <FIG>, the display apparatus <NUM> includes a display panel <NUM> and a controller <NUM> that controls driving of the display panel <NUM>. The controller <NUM> controls the driving of the display panel <NUM>, for example, on the basis of an image signal Din and a synchronization signal Tin supplied from an outside.

For example, as illustrated in <FIG>, the display panel <NUM> includes a mounting substrate 110A and a transparent substrate 110B overlaid on the mounting substrate 110A. The transparent substrate 110B has a role of protecting light emitting elements <NUM> (which will be described later) included in the mounting substrate 110A, and includes, for example, a glass substrate, a resin substrate, or the like. For example, as illustrated in <FIG>, the mounting substrate 110A includes a pixel array <NUM>, a gate driver <NUM>, and a data driver <NUM>. The pixel array <NUM>, the gate driver <NUM>, and the data driver <NUM> are mounted, for example, on a wiring substrate <NUM> which will be described later. The gate driver <NUM> and the data driver <NUM> drive the pixel array <NUM> in accordance with a control performed by the controller <NUM> to thereby cause the pixel array <NUM> to display an image. The gate driver <NUM> is coupled to multiple gate lines GTL. The gate driver <NUM> drives the pixel array <NUM>, for example, by sequentially applying a selection voltage to the multiple gate lines GTL. The data driver <NUM> is coupled to multiple data lines DTL. The data driver <NUM> drives the pixel array <NUM>, for example, by applying a signal voltage corresponding to the image signal Din to the multiple data lines DTL.

<FIG> illustrates an example of a plan layout of the mounting substrate 110A. Mounted on the mounting substrate 110A are multiple pixel chips <NUM> disposed in a matrix. The pixel chip <NUM> corresponds to a specific example of a "light emitting device" of the present disclosure. The pixel chip <NUM> has a size, for example, of <NUM> or greater and <NUM> or less, and is a so-called micro LED. It is to be noted that the pixel chip <NUM> may be, for example, a so-called mini LED having a size of greater than <NUM> and <NUM> or less. The pixel chip <NUM> is provided with one pixel <NUM>. The pixel <NUM> includes, for example, three pixels <NUM>, 11B, and 11R that differ from each other in light emission color. That is, the pixel chip <NUM> includes, for example, the three pixels <NUM>, 11B, and 11R that differ from each other in the light emission color. In the pixel chip <NUM>, the three pixels <NUM>, 11B, and 11R are disposed, for example, at three respective locations in a <NUM> × <NUM> matrix.

On a surface of the mounting substrate 110A on which each of the pixel chips <NUM> is mounted, for example, four electrodes (a G-electrode <NUM>, a B-electrode 13B, an R-electrode 13R, and a C-electrode 13C) are provided for each of the pixel chips <NUM>. Coupled to the G-electrode <NUM> is a first electrode <NUM> (<NUM>) of the pixel <NUM> in the pixel chip <NUM>. Coupled to the B-electrode 13B is a first electrode <NUM> (16B) of the pixel 11B in the pixel chip <NUM>. Coupled to the R-electrode 13R is a first electrode <NUM> (16R) of the pixel 11R in the pixel chip <NUM>. Coupled to the C-electrode 13C is a second electrode <NUM> of each of the pixels <NUM>, 11B, and 11R in the pixel chip <NUM>. The pixels <NUM>, 11B, and 11R share the second electrode <NUM> with each other. That is, each of the pixel chips <NUM> is provided with only one second electrode <NUM>. On the mounting substrate 110A, the four electrodes (the G-electrode <NUM>, the B-electrode 13B, the R-electrode 13R, and the C-electrode 13C) are disposed, for example, in a <NUM> × <NUM> matrix.

The mounting substrate 110A is provided with, for example, the multiple gate lines GTL extending in a row direction, the multiple data lines DTL extending in a column direction, and multiple ground lines GND extending in the row direction. The multiple gate lines GTL are provided, for example, in such a manner that one multiple gate line GTL is provided per line of two or more pixel chips <NUM> disposed side by side in the row direction. The multiple data lines DTL are provided, for example, in such a manner that three data lines DTL are provided per line of two or more pixel chips <NUM> disposed side by side in the column direction. The multiple ground lines GND are provided, for example, in such a manner that one ground line GND is provided per line of two or more pixel chips <NUM> disposed side by side in the row direction.

<FIG> illustrates a circuit configuration example of each of the pixels <NUM>, 11B, and 11R. Each of the pixels includes the light emitting element <NUM> and a pixel circuit <NUM> that controls light emission and light extinction of the light emitting element <NUM>. The light emitting element <NUM> is, for example, a light emitting diode (LED) that emits light (blue light) in a blue band having a light emission wavelength of <NUM> or greater and <NUM> or less. The pixel circuit <NUM> includes, for example, a driving transistor Tr1, a writing transistor Tr2, and a holding capacitor Cs. The writing transistor Tr2 controls a voltage to be applied to a gate of the driving transistor Tr1. The writing transistor Tr2 samples a voltage of the data line DTL and writes the voltage obtained by the sampling to the gate of the driving transistor Tr1. The holding capacitor Cs is coupled to the gate of the driving transistor Tr1 and the ground line GND, and holds a gate voltage of the driving transistor Tr1. The driving transistor Tr1 is coupled in series to a power supply voltage VDD and the light emitting element <NUM>. The driving transistor Tr1 drives the light emitting element <NUM>. The driving transistor Tr1 controls a current flowing through the light emitting element <NUM> in accordance with the voltage supplied to the gate of the driving transistor Tr1. That is, the pixel circuit <NUM> causes a current corresponding to a signal voltage supplied from the data driver <NUM> to flow into the light emitting element <NUM>, thereby causing the light emitting element <NUM> to emit light having a luminance corresponding to the signal voltage supplied from the data driver <NUM>. The circuit of each of the pixels <NUM>, 11B, and 11R is not limited to the circuit illustrated in <FIG>.

<FIG> each illustrate a horizontal cross-sectional configuration example of the pixel chip <NUM>. <FIG> each illustrate a vertical cross-sectional configuration example of the pixel chip <NUM>. The horizontal cross-section refers to a cross-section parallel to a light emitting surface <NUM> which will be described later, and the vertical cross-section refers to a cross-section perpendicular to the light emitting surface <NUM>. <FIG> illustrates a cross-sectional configuration example taken along a line F-F in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line G-G in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line H-H in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line I-I in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line A-A in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line B-B in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line C-C in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line D-D in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line E-E in each of <FIG>.

As described above, the pixel chip <NUM> includes the three pixels <NUM>, 11B, and 11R. In the pixel chip <NUM>, the pixels <NUM>, 11B, and 11R include the respective light emitting elements <NUM> that emit light of the same color (blue light) regardless of the kinds of the pixels, and include respective optical members, on the light emitting surfaces <NUM> of the light emitting elements <NUM>, that differ from each other in color conversion function. That is, in the pixel chip <NUM>, the pixels <NUM>, 11B, and 11R are configured to emit, by means of the optical members, respective pieces of light that differ from each other in the light emission color.

For example, as illustrated in <FIG> and <FIG>, the pixel <NUM> includes the light emitting element <NUM> and a color conversion section <NUM> provided on the light emitting surface <NUM> of the light emitting element <NUM>. The color conversion section <NUM> corresponds to the above-described optical member. The color conversion section <NUM> is provided in correspondence with the light emitting element <NUM> provided immediately below the color conversion section <NUM>. The light emitting element <NUM> emits light (blue light) toward the color conversion section <NUM> via the light emitting surface <NUM>. The color conversion section <NUM> performs color conversion (wavelength conversion) on the blue light emitted from the corresponding light emitting element <NUM>. The color conversion section <NUM> converts the entering blue light into green light, and emits the green light obtained by the color conversion to an opposite side to a light emitting element <NUM> side. The pixel <NUM> emits green light having a desired light emission intensity due to driving of the pixel circuit <NUM> by the gate driver <NUM> and the data driver <NUM>.

For example, as illustrated in <FIG>, the pixel 11B includes the light emitting element <NUM> and a light transmitting section 125C provided on the light emitting surface <NUM> of the light emitting element <NUM>. The light transmitting section 125C corresponds to the above-described optical member. The light transmitting section 125C is provided in correspondence with the light emitting element <NUM> provided immediately below the light transmitting section 125C. The light emitting element <NUM> emits light (blue light) toward the light transmitting section 125C via the light emitting surface <NUM>. The light transmitting section 125C transmits the blue light emitted from the corresponding light emitting element <NUM>. The light transmitting section 125C transmits the entering blue light, and emits the entering blue light to an opposite side to a light emitting element <NUM> side. That is, it is not intended that the light transmitting section 125C performs color conversion. The pixel 11B emits blue light having a desired light emission intensity due to driving of the pixel circuit <NUM> by the gate driver <NUM> and the data driver <NUM>.

For example, as illustrated in <FIG> and <FIG>, the pixel 11R includes the light emitting element <NUM> and a color conversion section 125R provided on the light emitting surface <NUM> of the light emitting element <NUM>. The color conversion section 125R corresponds to the above-described optical member. The color conversion section 125R is provided in correspondence with the light emitting element <NUM> provided immediately below the color conversion section 125R. The light emitting element <NUM> emits light (blue light) toward the color conversion section 125R via the light emitting surface <NUM>. The color conversion section 125R performs color conversion (wavelength conversion) on the blue light emitted from the corresponding light emitting element <NUM>. The color conversion section 125R converts the entering blue light into red light, and emits the red light obtained by the color conversion to an opposite side to a light emitting element <NUM> side. The pixel 11R emits red light having a desired light emission intensity due to driving of the pixel circuit <NUM> by the gate driver <NUM> and the data driver <NUM>.

For example, as illustrated in <FIG>, the light emitting element <NUM> includes a semiconductor layer including a first conductive layer 15a, a light emitting layer 15b, and a second conductive layer 15c that are stacked in this order. The first conductive layer 15a has the light emitting surface <NUM>. The above-described semiconductor layer includes, for example, a single-crystal multilayered film including GaN, InGaN, and AlGaN. The first conductive layer 15a includes, for example, an n-type semiconductor. The light emitting layer 15b includes, for example, a non-doped semiconductor. The second conductive layer 15c includes, for example, a p-type semiconductor.

For example, as illustrated in <FIG>, the light emitting element <NUM> further includes the first electrode <NUM> in contact with the second conductive layer 15c and the second electrode <NUM> in contact with the first conductive layer 15a. The first electrode <NUM> is in ohmic contact with the second conductive layer 15c. The first electrode <NUM> includes, for example, a stacked film (Ni/Au) of nickel (Ni) and gold (Au) or a stacked film (Pd/Au) of palladium (Pd) and gold (Au). The first electrode <NUM> may include, for example, a single-layer film of platinum (Pt), or may include a stacked film including ITO (Indium Tin Oxide) in contact with the second conductive layer 15c and a metal layer in contact with the ITO. The second electrode <NUM> is in ohmic contact with the first conductive layer 15a. The second electrode <NUM> includes, for example, a stacked film (Ti/Al) of titanium (Ti) and aluminum (Al), or a stacked film (Cr/Au) of chromium (Cr) and gold (Au).

For example, as illustrated in <FIG>, in the above-described semiconductor layer, a portion of the first conductive layer 15a, the light emitting layer 15b, and the second conductive layer 15c form a mesa part protruding toward a wiring substrate <NUM> side. The first electrode <NUM> is disposed at the top of the mesa part and the second electrode <NUM> is disposed at the bottom of the mesa part. That is, the second electrode <NUM> is provided on a surface of the first conductive layer 15a on an opposite side to the light emitting surface <NUM>, and the first electrode <NUM> and the second electrode <NUM> are provided on a surface of the pixel chip <NUM> on an opposite side to a light emitting surface <NUM> side.

For example, as illustrated in <FIG>, the second electrode <NUM> is shared by the light emitting elements <NUM> in the pixel chip <NUM>. In addition, for example, as illustrated in <FIG>, the first conductive layer 15a is shared by the light emitting elements <NUM> in the pixel chip <NUM>. That is, in the pixel chip <NUM>, the first conductive layers 15a of the respective light emitting elements <NUM> are integrally formed. Each of the light emitting elements <NUM> has a current path P in the first conductive layer 15a from a portion opposed to the first electrode <NUM> to a portion opposed to the second electrode <NUM>. For example, as illustrated in <FIG> and <FIG>, the light emitting element <NUM> of the pixel <NUM> has a current path Pgc in the first conductive layer 15a from a portion opposed to the first electrode <NUM> to a portion opposed to the second electrode <NUM>. For example, as illustrated in <FIG> and <FIG>, the light emitting element <NUM> of the pixel 11B has a current path Pbc in the first conductive layer 15a from a portion opposed to the first electrode 16B to a portion opposed to the second electrode <NUM>. For example, as illustrated in <FIG> and <FIG>, the light emitting element <NUM> of the pixel 11R has a current path Prc in the first conductive layer 15a from a portion opposed to the first electrode 16R to a portion opposed to the second electrode <NUM>. That is, in the pixel chip <NUM>, the first conductive layer 15a has the three current paths Pgc, Pbc, and Prc extending radially from the portion opposed to the second electrode <NUM>.

The first conductive layer 15a has a trench 15t in a region between the two current paths Pgc and Pbc that are adjacent to each other. In addition, the first conductive layer 15a has another trench 15t in a region between the two current paths Pbc and Prc adjacent to each other. The trench 15t is formed, for example, by etching the first conductive layer 15a from the opposite side to the light emitting surface <NUM> side, and is provided, for example, to run through the first conductive layer 15a. In a case where the trench 15t is provided to run through the first conductive layer 15a, no current flows across the trench 15t in the first conductive layer 15a. In a case where the trench 15t is provided at a depth at which the trench 15t does not run through the first conductive layer 15a, a cross-sectional area of a portion having the trench 15t is less than a cross-sectional area of other portions in the first conductive layer 15a, and it is difficult for a current to flow in the portion having the trench 15t in the first conductive layer 15a. It is to be noted that, for example, the trench 15t may be formed by etching the first conductive layer 15a from the light emitting surface <NUM> side.

An electrode <NUM> is provided in contact with the first electrode <NUM> of the pixel <NUM>. An electrode 18B is provided in contact with the first electrode 16B of the pixel 11B. An electrode 18R is provided in contact with the first electrode 16R of the pixel 11R. An electrode <NUM> is provided in contact with the second electrode <NUM> shared by the pixels <NUM>, 11B, and 11R. The electrode <NUM> has a bottom surface in the same plane as bottom surfaces of the electrodes <NUM> (<NUM>, 18B, and 18R). Each of the bottom surfaces of the electrodes <NUM> (<NUM>, 18B, and 18R) and the electrode <NUM> is provided with a metal bump <NUM>. The pixel chip <NUM> is electrically coupled to the wiring substrate <NUM> via each of the metal bumps <NUM>. It is to be noted that solder balls may be provided in place of the metal bumps <NUM>.

In addition, for example, as illustrated in <FIG>, <FIG>, the pixel chip <NUM> includes a light blocking section 15w in each of the trenches 15t formed in the first conductive layer 15a. The light blocking section 15w is provided at least on the light emitting surface <NUM> side in the trench 15t. For example, the light blocking section 15w is provided along an inner wall in the trench 15t. A side surface of each of the light emitting elements <NUM> corresponds to the inner wall in the trench 15t. For example, the light blocking section 15w may be provided not only along the inner wall in the trench 15t but also along a portion of the bottom surface of the light emitting element <NUM> that is not covered with the electrode <NUM>. In this case, in terms of light leakage prevention, the light blocking section 15w may include a material that absorbs the light (the blue light) emitted from the light emitting layer 15b. Examples of such a material include a resin in which a light absorbing material such as carbon particles is dispersed (a so-called black resist).

In terms of an improvement in light extraction efficiency, the light blocking section 15w may serve as a reflection mirror that reflects the light (the blue light) emitted from the light emitting layer 15b. In addition, in terms of the improvement in light extraction efficiency, the side surface of each of the light emitting elements <NUM> may have a tapered shape when viewed from the light emitting surface <NUM> side, and the light blocking section 15w may serve as a reflection mirror that reflects the light (the blue light) emitted from the light emitting layer 15b toward the light emitting surface <NUM> side. It is to be noted that the light blocking section 15w may be provided in such a manner as to fill in the trench 15t.

In order to serve as the reflection mirror, for example, the light blocking section 15w may include a multilayered film in which an insulation film <NUM>, a metal film <NUM>, and an insulation film <NUM> are stacked in this order from the side surface of the light emitting element <NUM>. The insulation films <NUM> and <NUM> each include, for example, a dielectric such as SiO<NUM> or Al<NUM>O<NUM>. In terms of the improvement in light extraction efficiency of the light emitting element <NUM>, for example, the metal film <NUM> may have a high reflectance with respect to the light (the blue light) emitted from the light emitting layer 15b. Examples of the material having such a characteristic include Al, Ag, Au, Cu, Ni, Ti, W, Pd, and an alloy including at least two materials from among them. For example, the metal film <NUM> may include Al, Ag, Au, Cu, Ni, Ti, W, Pd, or a multilayered film including at least two materials from among them.

It is to be noted that the light blocking section 15w may include a material having a low reflectance and a high light absorption property (e.g., a carbon dispersion resin, a low-reflection metal compound, a metal oxide, a color dispersion resin, or the like).

For example, each of the color conversion sections <NUM> and 125R absorbs excitation light (the blue light) emitted from the light emitting element <NUM> and performs wavelength conversion on the excitation light. The color conversion sections <NUM> and 125R each include, for example, a block in which multiple quantum-dot phosphors are fixed with a resin binder. The color conversion sections <NUM> and 125R may each further include, for example, a light scatterer that scatters the excitation light (the blue light) emitted from the light emitting element <NUM>. The light scatterer includes, for example, a material having a refractive index different from a refractive index of the resin included in each of the color conversion sections <NUM> and 125R.

The quantum-dot phosphor absorbs the excitation light (the blue light) emitted from the light emitting element <NUM> and emits fluorescent light. The quantum-dot phosphor included in the color conversion section <NUM> is, for example, a phosphor in a particle form that emits fluorescent light having a wavelength of green that is <NUM> or greater and <NUM> or less. The quantum-dot phosphor included in the color conversion section 125R is, for example, a phosphor in a particle form that emits fluorescent light having a wavelength of red that is <NUM> or greater and <NUM> or less. The quantum-dot phosphor includes, for example, a solid solution or a multilayered structure including one or more kinds of materials selected from CdS, CdSe, ZnS, ZnSe, InAgS, and CsPbClxBr<NUM>-x. The quantum-dot phosphor may be, for example, phosphor particles of an oxide, a fluoride, or a nitride that are dispersed and fixed, or may be an organic phosphor.

To supply the quantum-dot phosphor, for example, an inkjet-type or needle-type dispenser is used to discharge or apply the quantum-dot phosphor depending on a viscosity of the resin mixed with the quantum-dot phosphor. This is classified as a non-plate printing method, and the above-described method enables to selectively fill an inside of a barrier with the quantum-dot phosphor, therefore making it possible to increase use efficiency of the quantum-dot phosphor. The resin including the quantum-dot phosphor may be applied to a predetermined place by a screen printing technique, a gravure printing technique, or the like that is a plate-type printing method. Alternatively, the resin including the quantum-dot phosphor may be applied to the entire base, for example, by a spin coater or the like.

The resin to be mixed with the quantum-dot phosphor is a resin for uniformly dispersing the quantum-dot phosphor, and includes, for example, a material having light transparency with respect to the light (the blue light) emitted from the light emitting element <NUM>. The resin to be mixed with the quantum-dot phosphor includes, for example, an acrylic-based, epoxy-based, or silicone-based resin material.

The light transmitting section 125C includes, for example, a material having a light transmitting property with respect to the light (the blue light) emitted from the light emitting element <NUM>. The light transmitting section 125C includes, for example, an acrylic-based, epoxy-based, or silicone-based resin material.

For example, as illustrated in <FIG>, the pixel chip <NUM> further includes, other than the light transmitting section 125C provided in the pixel 11B, another light transmitting section 125C (hereinafter, referred to as a "light transmitting section 125Ca" when it is distinguished from the light transmitting section 125C provided in the pixel 11B) on a portion of the top surface of the first conductive layer 15a that is opposed to the second electrode <NUM>. For example, as illustrated in <FIG>, the pixel chip <NUM> further includes a light blocking layer <NUM> that covers a surface of the light transmitting section 125Ca on an opposite side to a first conductive layer 15a side. The light blocking layer <NUM> prevents light from leaking to the outside via the light transmitting section 125Ca. The light blocking layer <NUM> includes, for example, a material having a low reflectance and a high light absorption property (e.g., a carbon dispersion resin, a low-reflection metal compound, a metal oxide, a color dispersion resin, or the like).

For example, as illustrated in <FIG> and <FIG>, the pixel chip <NUM> further includes a light blocking section <NUM> that partitions the color conversion section <NUM>, the color conversion section 125R, the light transmitting section 125C, and the light transmitting section 125Ca from each other. The light blocking section <NUM> includes, for example, a material having a high reflectance with respect to visible light. Examples of a material having such a characteristic include Al, Ag, Cu, Ni, Cr, W, Ti, and an alloy including at least two materials from among them. The light blocking section <NUM> may include, for example, a material that absorbs visible light. Examples of a material having such a characteristic include a resin in which a light absorbing material such as carbon particles is dispersed (a so-called black resist). The light blocking section <NUM> may include, for example, a partition including an organic resin, a dielectric (such as SiO<NUM> or Al<NUM>O<NUM>), a semiconductor (such as Si), or the like; and a reflection layer 126a including a material formed on a side surface of the partition and having a high reflectance with respect to visible light.

For example, as illustrated in <FIG>, the pixel chip <NUM> may further include a protection layer <NUM> on an as-needed basis. For example, the protection layer <NUM> has a role of protecting the respective surfaces of the color conversion section <NUM>, the color conversion section 125R, the light transmitting section 125C, and the light blocking layer <NUM>; and a role of sealing the color conversion section <NUM> and the color conversion section 125R with respect to oxygen, moisture, or the like. The protection layer <NUM> is provided in contact with the respective top surfaces of the color conversion section <NUM>, the color conversion section 125R, the light transmitting section 125C, and the light blocking layer <NUM>. The protection layer <NUM> includes, for example, for example, SiN, Al<NUM>O<NUM>, AlN, ZrO<NUM>, Ta<NUM>O<NUM>, TiO<NUM>, ZnO, or the like.

In the pixel chip <NUM>, the three first electrodes <NUM> (<NUM>, 16B, and 16R) each included in the corresponding one of the pixels <NUM>, 11B, and 11R, and the second electrode <NUM> shared by the pixels <NUM>, 11B, and 11R are disposed, for example, in a <NUM> × <NUM> matrix. In this case, the three first electrodes <NUM> (<NUM>, 16B, and 16R) and the second electrode <NUM> are the same as each other in size, for example.

Next, a description is given of a method of manufacturing the mounting substrate 110A. <FIG> each illustrate an example of a process of manufacturing the mounting substrate 110A.

First, compound semiconductors are formed together on a semiconductor substrate <NUM>, for example, by an epitaxial crystal growth method such as an MOCVD (Metal Organic Chemical Vapor Deposition: metal organic chemical vapor deposition) method. Upon using the epitaxial crystal growth method such as the MOCVD method, for example, trimethylgallium ((CH<NUM>)<NUM>Ga) is used as a raw-material gas for gallium; for example, trimethylindium ((CH<NUM>)<NUM>In) is used as a raw-material gas for indium; trimethylaluminum ((CH<NUM>)<NUM>Al) is used as a raw-material for aluminum; and ammonia (NH<NUM>) is used as a raw-material gas for nitrogen. Further, for example, monosilane (SiH<NUM>) is used as a raw-material gas for silicon; and for example, bis(cyclopentadienyl)magnesium ((C<NUM>H<NUM>)<NUM>Mg) is used as a raw-material gas for magnesium.

First, the first conductive layer 15a, the light emitting layer 15b, and the second conductive layer 15c are formed in this order on a surface of the semiconductor substrate <NUM>, for example, by an epitaxial crystal growth method such as a MOCVD method (<FIG>). Thus, a light emitting element substrate <NUM> is formed.

Thereafter, for example, a resist layer (not illustrated) having a predetermined pattern is formed, following which the second conductive layer 15c, the light emitting layer 15b, and a portion of the first conductive layer 15a are selectively etched using this resist layer as a mask. Thus, for example, as illustrated in <FIG>, multiple mesa parts each having a column shape are formed. In this case, each of the mesa parts serves as the light emitting element <NUM>. For example, a plan configuration in this case is as illustrated in <FIG>. It is to be noted that a cross-sectional configuration example taken along a line X-X in <FIG> corresponds to a cross-sectional view illustrated in <FIG>. Every three mesa parts (the light emitting elements <NUM>) of the multiple mesa parts (the light emitting elements <NUM>) formed on the light emitting element substrate <NUM> are disposed at three respective locations in a <NUM> × <NUM> matrix. For example, each of the three mesa parts (the light emitting elements <NUM>) disposed at the three respective locations in the <NUM> × <NUM> matrix has a substantially square shape in a plan view, and has a shape with a notch at a portion corresponding to the middle of the <NUM> × <NUM> matrix.

Thereafter, the first electrode <NUM> and the second electrode <NUM> are formed (<FIG>). The first electrode <NUM> is in contact with the top (the top surface of the second conductive layer 15c) of each of the mesa parts (the light emitting elements <NUM>), and the second electrode <NUM> is in contact with the bottom (the top surface of the first conductive layer 15a) of each of the mesa parts (the light emitting elements <NUM>). Thereafter, for example, a resist layer (not illustrated) having a predetermined pattern is formed, following which etching is performed selectively on the first conductive layer 15a using the resist layer as a mask at: a gap portion between two mesa parts (the light emitting elements <NUM>) adjacent to each other in the row direction (hereinafter, referred to as a "first gap portion"); a gap portion between two mesa parts (the light emitting elements <NUM>) adjacent to each other in the column direction (hereinafter, referred to as a "second gap portion"); a portion along the notch of the mesa part (the light emitting element <NUM>) provided at (<NUM>, <NUM>) in the <NUM> × <NUM> matrix; and a portion along the notch of the mesa part (the light emitting element <NUM>) provided at (<NUM>, <NUM>) in the <NUM> × <NUM> matrix. Thus, for example, as illustrated in <FIG>, two trenches 15t are formed in the first conductive layer 15a. It is to be noted that <FIG> is a plan configuration example of <FIG> is a cross-sectional configuration example taken along a line X-X in <FIG>. At this time, each of the trenches 15t runs through the first conductive layer 15a, for example, as illustrated in <FIG>. It is to be noted that, at this time, each of the trenches 15t may have a depth to the extent at which the trench 15t does not run through the first conductive layer 15a.

Thereafter, the insulation film <NUM>, the metal film <NUM>, and the insulation film <NUM> are stacked in this order on the entire surface including the inner wall of each of the trenches 15t (<FIG>). It is to be noted that <FIG> is a plan configuration example of <FIG> is a cross-sectional configuration example taken along a line X-X in <FIG>. Thus, the light blocking section 15w is formed in each of the trenches 15t. In this case, a predetermined gap is formed between the two trenches 15t (the light blocking sections 15w), and the gap becomes a portion of the current path Pbc.

Thereafter, a resist layer <NUM> is formed to embed the insulation film <NUM> therein, following which an opening is formed at a predetermined portion in the resist layer <NUM>. For example, an opening 150a is formed at a portion of the resist layer <NUM> opposed to the first electrode <NUM> (<NUM>, 16B, or 16R) of each of the mesa parts (the light emitting elements <NUM>), and an opening 150b is formed at a portion opposed to the second electrode <NUM> (<FIG>). Thereafter, the insulation film <NUM>, the metal film <NUM>, and the insulation film <NUM> are selectively etched using the resist layer <NUM> as a mask. Thus, openings 150a' and 150b' are formed in the multilayered film including the insulation film <NUM>, the metal film <NUM>, and the insulation film <NUM> (<FIG>). In this case, the first electrode <NUM> (<NUM>, 16B, or 16R) is exposed at a bottom surface of each of the openings 150a', and the second electrode <NUM> is exposed at a bottom surface of the opening 150b'.

Thereafter, for example, the electrode <NUM> (<NUM>, 18B, or 18R) is formed in each of the openings 150a' and the electrode <NUM> is formed in the opening 150b' by a plating process (<FIG>). Thereafter, the resist layers <NUM> is removed (<FIG>).

Thereafter, for example, the light emitting element substrate <NUM> is mounted on the wiring substrate <NUM> in a state where each of the mesa parts (the light emitting elements <NUM>) are directed toward the wiring substrate <NUM> side on which the metal bumps <NUM> are formed (<FIG>). Thus, the light emitting element substrate <NUM> and the wiring substrate <NUM> are bonded to each other with the multiple metal bumps <NUM> interposed therebetween. Thereafter, gaps between the light emitting element substrate <NUM> and the wiring substrate <NUM> are filled with a resin material such as polyimide to form an embedding layer <NUM> (<FIG>). Thereafter, the semiconductor substrate <NUM> is removed from a light emitting element layer <NUM> including the multiple light emitting elements <NUM> (<FIG>). Thus, the light emitting surface <NUM> of each of the light emitting elements <NUM> is exposed.

Thereafter, for example, the light blocking section <NUM> is formed on a surface including the light emitting surface <NUM> of each of the light emitting elements <NUM> (<FIG>). It is to be noted that <FIG> illustrates a plan configuration example of <FIG> illustrates a cross-sectional configuration example taken along a line X-X in <FIG>. The light blocking section <NUM> is provided with openings <NUM>, 126B, and 126R at respective portions opposed to the light emitting elements <NUM>. The light emitting surface <NUM> (the first conductive layer 15a) of the light emitting element <NUM> is exposed at the bottom surface of each of the openings <NUM>, 126B, and 126R. The light blocking section <NUM> is further provided with an opening 126C at a portion opposed to the second electrode <NUM> (the electrode <NUM>). The first conductive layer 15a of the light emitting element <NUM> is exposed at the bottom surface of the opening 126C. It is to be noted that the reflection layer 126a may be provided in contact with an inner wall of the light blocking section <NUM> (an inner wall of each of the openings <NUM>, 126B, 126R, and 126C) on an as-needed basis (<FIG>).

Thereafter, for example, a resin <NUM>' in which at least multiple quantum-dot phosphors are dispersed is applied to the entire surface having the openings <NUM>, 126B, 126R, and 126C (<FIG>). Thereafter, the resin <NUM>' is left only in the opening <NUM> opposed to the light emitting element <NUM> on the G-electrode <NUM>. Thus, the color conversion section <NUM> is formed in the opening <NUM> (<FIG>). Thereafter, for example, a resin 125R' in which at least multiple quantum-dot phosphors are dispersed is applied to the entire surface having the openings 126B, 126R, and 126C (<FIG>). Thereafter, the resin 125R' is left only in the opening 126R opposed to the light emitting element <NUM> on the R-electrode 13R. Thus, the color conversion section 125R is formed in the opening 126R (<FIG>).

Thereafter, for example, a resin 125C' including no quantum-dot phosphor is applied to the entire surface having the openings 126R and 126C (<FIG>). Thereafter, the resin 125C' is left only in the openings <NUM> and 126C opposed to the light emitting elements <NUM> on the electrodes 13B and 13C. Thus, the light transmitting section 125C is formed in each of the openings <NUM> and 126C (<FIG>). In addition, a top portion of the light transmitting section 125C provided at a location opposed to the C-electrode 13C is removed to provide a recess, and the light blocking layer <NUM> is formed in the recess (<FIG>). Thereafter, the entire surface is planarized, following which the protection layer <NUM> is formed on the planarized surface (<FIG>). Thus, the multiple pixel chips <NUM> are formed on the wiring substrate <NUM>. Lastly, the gate driver <NUM> and the data driver <NUM> are mounted on the wiring substrate <NUM> at portions in which no pixel chip <NUM> is formed. Thus, the mounting substrate 110A is formed.

Next, an operation of the display apparatus <NUM> is described. Each of the light emitting elements <NUM> in the pixel chip <NUM> is driven by the gate driver <NUM> and the data driver <NUM> to thereby emit blue light LB having a predetermined light emission intensity, for example, as illustrated in <FIG>. The blue light LB emitted from the first light emitting element <NUM> in the pixel chip <NUM> is converted into green light LG by the color conversion section <NUM>, and the converted light (the green light LG) is emitted to the outside as light of the pixel <NUM>. In addition, the blue light LB emitted from the second light emitting element <NUM> in the pixel chip <NUM> passes through the light transmitting section 125C, and is emitted to the outside as light of the pixel 11B. The blue light LB emitted from the third light emitting element <NUM> in the pixel chip <NUM> is converted into red light LR by the color conversion section 125R, and the converted light (the red light LR) is emitted to the outside as light of the pixel 11R. Three pieces of light (the green light LG, the blue light LB, and the red light LR) that differ from each other in the light emission color are emitted at predetermined respective intensities from each of the pixel chips <NUM> disposed on the mounting substrate 110A. The three pieces of light (the green light LG, the blue light LB, and the red light LR) that differ from each other in the light emission color and are emitted from each of the pixel chips <NUM> disposed on the mounting substrate 110A form image light. Entering of the image light into the retina of the user allows the user to recognize that an image is displayed on the display panel <NUM>.

Next, effects of the display apparatus <NUM> are described.

A display apparatus (an LED display) in which light emitting diodes (LED: Light Emitting Diode) having respective colors of red, green, and blue are used as pixels and are disposed in a two-dimensional matrix has been put into practical use and widely used. For each of the light emission colors, light emitting diodes are fabricated by forming, by crystal growth, a semiconductor multilayered film with a controlled band gap and a controlled conductivity type on a single-crystal substrate; performing a process such as electrode formation; and dividing the resultant by a dicing apparatus into pieces for the respective elements. A display apparatus has been manufactured by mounting each individualized piece of the element on a wiring substrate or a drive circuit board by a mechanical apparatus such as a chip mounter. Therefore, it has been difficult to increase definition, for example, to have a pixel arrangement cycle (a pixel pitch) of about <NUM> or less.

To address the above, recently, the definition has been increased to have a pixel arrangement cycle from <NUM> or less to several tens micrometers due to a decrease in element size by optical patterning and etching and due to development of a method of collectively mounting multiple fine elements with use of a bonding material or the like. However, even in such a method, re-arrangement of LEDs having different light emission colors on the same substrate limits a decrease in size. For example, to obtain a light-weighted head mounted display, it is desired to make the display size to be about <NUM> × <NUM> or less; and to provide pixels of about <NUM> × <NUM> or more, it is required to make the pixel arrangement cycle to be about <NUM> or less. To arrange and mount the LEDs having three colors in such a cycle, it is necessary to use an extremely highly accurate mounting apparatus for alignment and mounting. This results in a great increase in manufacturing cost as compared with an existing (liquid crystal or organic EL) display apparatus formed monolithically.

Meanwhile, as a more effective method for achieving a higher definition, consideration has been given to fabricating a multi-color display apparatus by forming an LED array with LEDs having a single color and alternately disposing on the LED array wavelength converters emitting mutually different fluorescent colors. In this case, for example, if each pixel includes three LEDs and a cathode electrode and an anode electrode are provided for each of the LEDs, it is necessary to couple six electrodes and a drive circuit board with each other for each pixel. In addition, for example, if each pixel includes three LEDs and if the LEDs in each pixel share a cathode-side conductive layer thereof and also share the cathode electrode, it is sufficient that four electrodes and the drive circuit board are coupled to each other in each pixel. In such a case, it is easier to increase the definition of the pixels.

However, in a case where the conductive layer is integrated as described above, optical crosstalk easily occurs in which light emitted from one LED propagates through the integrated conductive layer and enters a wavelength converter provided for another LED. In a case where such optical crosstalk occurs, color reproducibility is lowered.

In contrast, in the present embodiment, the first conductive layer 15a is provided with the trench 15t in the region between the two current paths Pgc and Pbc adjacent to each other, and is also provided with the trench 15t in the region between the two current paths Pbc and Prc adjacent to each other. In addition, the light blocking section 15w is provided in each of the trenches 15t. This makes it possible, in each of the light emitting elements <NUM>, to reduce, by means of the light blocking section 15w, leakage of light emitted from the light emitting layer 15b into the first conductive layer 15a of the adjacent light emitting element <NUM>, while securing the current path. As a result, it is possible to suppress optical crosstalk.

In the present embodiment, the light emitting elements <NUM> share the second electrode <NUM>, and only one second electrode <NUM> is provided in the pixel chip <NUM>. This makes it possible to reduce the number of electrodes per pixel chip <NUM>, as compared with a case where the light emitting elements <NUM> are provided separately and the second electrode <NUM> is provided for each of the light emitting elements <NUM>. As a result, it is possible to reduce the size of the pixel chip <NUM>, and is also possible to suppress occurrence of defects due to a bonding error in mounting or the like.

In the present embodiment, each of the trenches 15t is provided to run through the first conductive layer 15a, and the light blocking section 15w is provided at least on the light emitting surface <NUM> side in each of the trenches 15t. This makes it possible to reduce, by means of the light blocking section 15w, leakage of the light emitted from the light emitting layer 15b into the first conductive layer 15a of the adjacent light emitting element <NUM>. As a result, it is possible to suppress optical crosstalk.

In the present embodiment, in a case where the light blocking section 15w is provided along the inner wall in each of the trenches 15t and serves as a reflection mirror that reflects the light emitted from the light emitting layer 15b, the light emitted from the light emitting layer 15b is reflected by the light blocking section 15w. This makes it possible to reduce leakage of the light emitted from the light emitting layer 15b into the first conductive layer 15a of the adjacent light emitting element <NUM>. As a result, it is possible to suppress optical crosstalk.

In the present embodiment, each of the pixel chips <NUM> is provided with the color conversion sections <NUM> and 125R. The color conversion section <NUM> performs color conversion on blue light emitted from the light emitting element <NUM> provided in correspondence with the color conversion section <NUM>, and the color conversion section 125R performs color conversion on blue light emitted from the light emitting element <NUM> provided in correspondence with the color conversion section 125R. This allows for providing the multiple light emitting elements <NUM> emitting light of the same color in a common semiconductor layer. Accordingly, it is possible to reduce the size of the pixel chip <NUM>, as compared with a case where the light emitting elements are formed separately. In addition, it is possible to reduce, by means of the light blocking section 15w formed in each of the trenches 15t formed in the common semiconductor layer (the first conductive layer 15a), leakage of light emitted from each of the light emitting elements <NUM> into the first conductive layer 15a of the adjacent light emitting element <NUM>. As a result, it is possible to suppress optical crosstalk while reducing the size of the pixel chip <NUM>.

In the present embodiment, in a case where the color conversion sections <NUM> and 125R each include the block including the multiple quantum-dot phosphors and the light scatterer, light (blue light) incident on each of the color conversion sections <NUM> and 125R is scattered by the light scatterer. It is therefore possible to cause the phosphor to efficiently absorb the blue scattered light. This increases the conversion efficiency in the color conversion sections <NUM> and 125R as compared with a case with no light scatterer. Therefore, it is possible to decrease the intensity of the light (the blue light) to enter each of the color conversion sections <NUM> and 125R, as compared with the case with no light scatterer. In such a case, it is possible to reduce the amount of light leaking into the first conductive layer 15a of the adjacent light emitting element <NUM>. As a result, it is possible to suppress optical crosstalk.

In the present embodiment, even in a case where each of the color conversion sections <NUM> and 125R includes a block in which multiple quantum-dot phosphors are fixed with a resin binder but includes no light scatterer, the light emitted from the light emitting layer 15b is blocked by the light blocking section 15w and it is possible to reduce leakage of the light emitted from the light emitting layer 15b into the first conductive layer 15a of the adjacent light emitting element <NUM>. As a result, it is possible to suppress optical crosstalk.

In the present embodiment, the second electrode <NUM> is provided on the surface on the opposite side to the light emitting surface <NUM> of the first conductive layer 15a. This makes it possible to electrically couple each of the light emitting elements <NUM> included in the light emitting element layer <NUM> and the wiring substrate <NUM> to each other, for example, only by bonding the light emitting element layer <NUM> to the wiring substrate <NUM>, as illustrated in <FIG>. Accordingly, even in a case where the definition of pixels is increased, it is possible to suppress occurrence of defects due to a bonding error in mounting or the like.

Next, a description in given of modifications of the display apparatus <NUM> according to the embodiment described above.

<FIG> illustrates an example of the plan layout of the mounting substrate 110A in the display apparatus <NUM> according to the embodiment described above. Mounted on the mounting substrate 110A are the multiple pixel chips <NUM> disposed in a matrix. The pixel chip <NUM> has the size, for example, of <NUM> or greater and <NUM> or less, and is a so-called micro LED. It is to be noted that the pixel chip <NUM> may be, for example, a so-called mini LED having a size of greater than <NUM> and <NUM> or less. The pixel chip <NUM> is provided with one pixel <NUM>.

The pixel <NUM> includes, for example, the three pixels <NUM>, 11B, and 11R that differ from each other in the light emission color. That is, the pixel chip <NUM> includes, for example, the three pixels <NUM>, 11B, and 11R that differ from each other in the light emission color. In the pixel chip <NUM>, the three pixels <NUM>, 11B, and 11R are disposed, for example, side by side in one line in the column direction.

On the mounting substrate 110A, the three electrodes (the G-electrode <NUM>, the B-electrode 13B, and the R-electrode 13R) are disposed, for example, side by side in one line in the column direction, and the C-electrode 13C is disposed, for example, adjacent, in the column direction, to the three electrodes (the G-electrode <NUM>, the B-electrode 13B, and the R-electrode 13R) disposed side by side in one line in the column direction.

<FIG> each illustrate a horizontal cross-sectional configuration example of the pixel chip <NUM> according to the present modification. <FIG> each illustrate a vertical cross-sectional configuration example of the pixel chip <NUM>. The horizontal cross-section refers to a cross-section parallel to the light emitting surface <NUM>, and the vertical cross-section refers to a cross-section perpendicular to the light emitting surface <NUM>. <FIG> illustrates a cross-sectional configuration example taken along a line F-F in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line G-G in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line H-H in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line I-I in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line A-A in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line B-B in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line C-C in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line D-D in each of <FIG>. <FIG> illustrates a cross-sectional configuration example taken along a line E-E in each of <FIG>.

As described above, the pixel chip <NUM> includes the three pixels <NUM>, 11B, and 11R. In the pixel chip <NUM>, the pixels <NUM>, 11B, and 11R include the respective light emitting elements <NUM> that emit light of the same color (blue light) regardless of the kinds of the pixels, and include respective optical members, on the light emitting surfaces <NUM> of the light emitting elements <NUM>, that differ from each other in the color conversion function. That is, in the pixel chip <NUM>, the pixels <NUM>, 11B, and 11R are configured to emit, by means of the optical members, respective pieces of light that differ from each other in the light emission color.

For example, as illustrated in <FIG> and <FIG>, the pixel <NUM> includes the light emitting element <NUM> and a color conversion section <NUM> provided on the light emitting surface <NUM> of the light emitting element <NUM>. The color conversion section <NUM> corresponds to the above-described optical member. The color conversion section <NUM> is provided in correspondence with the light emitting element <NUM> provided immediately below the color conversion section <NUM>. The light emitting element <NUM> emits light (blue light) toward the color conversion section <NUM> via the light emitting surface <NUM>. The color conversion section <NUM> performs color conversion (wavelength conversion) on the blue light emitted from the corresponding light emitting element <NUM>. The color conversion section <NUM> converts the entering blue light into green light, and emits the green light obtained by the color conversion to an opposite side to the light emitting element <NUM> side. The pixel <NUM> emits green light having a desired light emission intensity due to driving of the pixel circuit <NUM> by the gate driver <NUM> and the data driver <NUM>.

For example, as illustrated in <FIG> and <FIG>, the pixel 11B includes the light emitting element <NUM> and a light transmitting section 125C provided on the light emitting surface <NUM> of the light emitting element <NUM>. The light transmitting section 125C corresponds to the above-described optical member. The light transmitting section 125C is provided in correspondence with the light emitting element <NUM> provided immediately below the light transmitting section 125C. The light emitting element <NUM> emits light (blue light) toward the light transmitting section 125C via the light emitting surface <NUM>. The light transmitting section 125C transmits the blue light emitted from the corresponding light emitting element <NUM>. The light transmitting section 125C transmits the entering blue light, and emits the entering blue light to an opposite side to the light emitting element <NUM> side. That is, it is not intended that the light transmitting section 125C performs color conversion. The pixel 11B emits blue light having a desired light emission intensity due to driving of the pixel circuit <NUM> by the gate driver <NUM> and the data driver <NUM>.

For example, as illustrated in <FIG> and <FIG>, the pixel 11R includes the light emitting element <NUM> and a color conversion section 125R provided on the light emitting surface <NUM> of the light emitting element <NUM>. The color conversion section 125R corresponds to the above-described optical member. The color conversion section 125R is provided in correspondence with the light emitting element <NUM> provided immediately below the color conversion section 125R. The light emitting element <NUM> emits light (blue light) toward the color conversion section 125R via the light emitting surface <NUM>. The color conversion section 125R performs color conversion (wavelength conversion) on the blue light emitted from the corresponding light emitting element <NUM>. The color conversion section 125R converts the entering blue light into red light, and emits the red light obtained by the color conversion to an opposite side to the light emitting element <NUM> side. The pixel 11R emits red light having a desired light emission intensity due to driving of the pixel circuit <NUM> by the gate driver <NUM> and the data driver <NUM>.

For example, as illustrated in <FIG> and <FIG>, the light emitting element <NUM> includes a semiconductor layer including a first conductive layer 15a, a light emitting layer 15b, and a second conductive layer 15c that are stacked in this order. The first conductive layer 15a has the light emitting surface <NUM>. The above-described semiconductor layer includes, for example, a single-crystal multilayered film including GaN and InGaN. The first conductive layer 15a includes, for example, an n-type semiconductor. The light emitting layer 15b includes, for example, a non-doped semiconductor. The second conductive layer 15c includes, for example, a p-type semiconductor.

For example, as illustrated in <FIG>, the light emitting element <NUM> further includes a first electrode <NUM> in contact with the second conductive layer 15c and a second electrode <NUM> in contact with the first conductive layer 15a. The first electrode <NUM> is in ohmic contact with the second conductive layer 15c. The first electrode <NUM> includes, for example, a multilayered film (Ni/Au) of nickel (Ni) and gold (Au). The second electrode <NUM> is in ohmic contact with the first conductive layer 15a. The second electrode <NUM> includes, for example, a multilayered film (Ti/Al) of titanium (Ti) and aluminum (Al), or a multilayered film (Cr/Au) of chromium (Cr) and gold (Au).

For example, as illustrated in <FIG>, in the above-described semiconductor layer, a portion of the first conductive layer 15a, the light emitting layer 15b, and the second conductive layer 15c form a mesa part protruding toward the wiring substrate <NUM> side. The first electrode <NUM> is disposed at the top of the mesa part and the second electrode <NUM> is disposed at the bottom of the mesa part. That is, the second electrode <NUM> is provided on a surface of the first conductive layer 15a on the opposite side to the light emitting surface <NUM>, and the first electrode <NUM> and the second electrode <NUM> are provided on the surface of the pixel chip <NUM> on the opposite side to the light emitting surface <NUM> side.

For example, as illustrated in <FIG>, the second electrode <NUM> is shared by the light emitting elements <NUM> in the pixel chip <NUM>. In addition, for example, as illustrated in <FIG>, the first conductive layer 15a is shared by the light emitting elements <NUM> in the pixel chip <NUM>. That is, in the pixel chip <NUM>, the first conductive layers 15a of the respective light emitting elements <NUM> are integrally formed. Each of the light emitting elements <NUM> has a current path P in the first conductive layer 15a from a portion opposed to the first electrode <NUM> to a portion opposed to the second electrode <NUM>. For example, as illustrated in <FIG> and <FIG>, the light emitting element <NUM> of the pixel <NUM> has a current path Pgc in the first conductive layer 15a from a portion opposed to the first electrode <NUM> to a portion opposed to the second electrode <NUM>. For example, as illustrated in <FIG> and <FIG>, the light emitting element <NUM> of the pixel 11B has a current path Pbc in the first conductive layer 15a from a portion opposed to the first electrode 16B to a portion opposed to the second electrode <NUM>. For example, as illustrated in <FIG> and <FIG>, the light emitting element <NUM> of the pixel 11R has a current path Prc in the first conductive layer 15a from a portion opposed to the first electrode 16R to a portion opposed to the second electrode <NUM>. That is, in the pixel chip <NUM>, the first conductive layer 15a has the three current paths Pgc, Pbc, and Prc that are parallel to each other. It is to be noted that because the second electrode <NUM> extends in the row direction in the pixel chip <NUM>, although respective ends of the current paths Pgc, Pbc, and Prc are provided at parts different from each other, they are provided within a portion of the first conductive layer 15a that is opposed to the second electrode <NUM>.

For example, as illustrated in <FIG> and <FIG>, the first conductive layer 15a has a trench 15t in a region between the two current paths Pgc and Pbc adjacent to each other. In addition, the first conductive layer 15a has another trench 15t in a region between the two current paths Pbc and Prc adjacent to each other. In addition, for example, as illustrated in <FIG> and <FIG>, the pixel chip <NUM> includes a light blocking section 15w in each of the trenches 15t formed in the first conductive layer 15a.

For example, as illustrated in <FIG>, the pixel chip <NUM> further includes, other than the light transmitting section 125C provided in the pixel 11B, another light transmitting section 125C (a light transmitting section 125Ca) on a portion of the top surface of the first conductive layer 15a that is opposed to the second electrode <NUM>. For example, as illustrated in <FIG>, the pixel chip <NUM> further includes a light blocking layer <NUM> that covers a surface of the light transmitting section 125Ca on an opposite side to the first conductive layer 15a side.

For example, as illustrated in <FIG> and <FIG>, the pixel chip <NUM> further includes a light blocking section <NUM> that partitions the color conversion section <NUM>, the color conversion section 125R, the light transmitting section 125C, and the light transmitting section 125Ca from each other. For example, as illustrated in <FIG>, the pixel chip <NUM> may further include a protection layer <NUM> on an as-needed basis.

In the pixel chip <NUM>, the three first electrodes <NUM> (<NUM>, 16B, and 16R) each included in the corresponding one of the pixels <NUM>, 11B, and 11R are, for example, disposed side by side in one line in the column direction, and the second electrode <NUM> shared by the pixels <NUM>, 11B, and 11R is, for example, disposed adjacent, in the column direction, to the three electrodes (the G-electrode <NUM>, the B-electrode 13B, and the R-electrode 13R) disposed side by side in one line in the column direction. In this case, for example, the second electrode <NUM> extends longer than the first electrode <NUM> in the column direction and has a size greater than that of the first electrode <NUM>.

Next, effects of the display apparatus <NUM> according to the present modification are described.

As with the above-described embodiment, in the present modification, the light emitting elements <NUM> share the second electrode <NUM>, and only one second electrode <NUM> is provided in the pixel chip <NUM>. This makes it possible to reduce the number of electrodes per pixel chip <NUM>, as compared with a case where the light emitting elements <NUM> are provided separately and the second electrode <NUM> is provided for each of the light emitting elements <NUM>. In addition, in the present modification, the three pixels <NUM>, 11B, and 11R are disposed side by side in one line in the column direction and are disposed adjacent to the three electrodes (the G-electrode <NUM>, the B-electrode 13B, and the R-electrode 13R) in the column direction in the pixel chip <NUM>. This makes it possible to increase the size of the second electrode <NUM>. As a result, it is possible to further suppress occurrence of defects due to a bonding error in mounting or the like by a synergetic effect with the reduction of the number of electrodes per pixel chip <NUM>.

In the embodiment and the modification thereof described above, for example, as illustrated in <FIG>, multiple trenches 15t may be provided in the region between the two current paths Pgc and Pbc adjacent to each other, and multiple trenches 15t may also be provided in the region between the two current paths Pbc and Prc adjacent to each other. In this case, in the region between the two current paths Pgc and Pbc adjacent to each other, the multiple trenches 15t are disposed in a manner that the multiple trenches 15t block a line straightly connecting the two current paths Pgc and Pbc adjacent to each other. In addition, in the region between the two current paths Pbc and Prc adjacent to each other, the multiple trenches 15t are disposed in a manner that the multiple trenches 15t block a line straightly connecting the two current paths Pbc and Prc adjacent to each other.

In such a case, in the region between the two current paths Pgc and Pbc adjacent to each other, a gap g1 is present between the multiple trenches 15t. Therefore, a current is able to flow between the two current paths Pgc and Pbc adjacent to each other via the gap g1. It is possible, however, to suppress leakage of light (blue light) generated in the pixel <NUM> into the adjacent pixel 11B and to suppress leakage of light (blue light) generated in the pixel 11B into the adjacent pixel <NUM> by means of the multiple trenches 15t. Similarly, in the region between the two current paths Pbc and Prc adjacent to each other, a gap g2 is present between the multiple trenches 15t. Therefore, a current is able to flow between the two current paths Pbc and Prc adjacent to each other via the gap g2. It is possible, however, to suppress leakage of light (blue light) generated in the pixel 11B into the adjacent pixel 11R and to suppress leakage of light (blue light) generated in the pixel 11R into the adjacent pixel 11B by means of the multiple trenches 15t. In addition, to expand the current path by providing the gaps g1 and g2 makes it possible to reduce electric resistance on the current paths. As a result, it is possible to reduce electric power consumed upon driving the pixels.

It is to be noted that, as illustrated in <FIG>, in the region between the two current paths Pgc and Pbc adjacent to each other, the multiple trenches 15t may be disposed side by side in one line with a predetermined gap g1 interposed therebetween. In addition, in the region between the two current paths Pbc and Prc adjacent to each other, the multiple trenches 15t may be disposed side by side in one line with a predetermined gap g21 interposed therebetween. In such a case, although light can slightly leak via the gap g1 or g2, it is possible to suppress leakage of light as compared with a case where the multiple trenches 15t are not provided.

In the embodiment and the modifications thereof described above, the pixel chip <NUM> includes the three pixels (11R, <NUM>, and 11B) that emit respective pieces of light of the three light emission colors of R, G, and B. In the embodiment and the modifications thereof described above, however, the pixel chip <NUM> may include three pixels that emit respective pieces of light of three light emission colors of a combination other than R, G, and B. In addition, in the embodiment and the modifications thereof described above, the pixel chip <NUM> may include two pixels or four or more pixels that differ from each other in the light emission color.

In the embodiment and the modifications thereof described above, for example, as illustrated in <FIG>, the pixel chip <NUM> may include four pixels 11R, 11B, <NUM>, and 11Y that differ from each other in the light emission color. In addition, in the embodiment and the modifications thereof described above, for example, as illustrated in <FIG>, the pixel chip <NUM> may include two pixels 11B and 11Y that differ from each other in the light emission color. Here, the pixel 11Y is a pixel that emits yellow light, and includes a color conversion section 125Y that converts blue light emitted from the light emitting element <NUM> into yellow light. In this case, the first electrode <NUM> of the light emitting element <NUM> included in the pixel 11Y is electrically coupled to a Y-electrode 13Y of the wiring substrate <NUM> via a metal bump <NUM>.

For example, the color conversion section 125Y absorbs excitation light (blue light) emitted from the light emitting element <NUM> and performs wavelength conversion thereon. The color conversion section 125Y includes, for example, a block in which multiple quantum-dot phosphors are fixed with a resin binder. The color conversion section 125Y may further include, for example, a light scatterer that scatters the excitation light (the blue light) emitted from the light emitting element <NUM>. The quantum-dot phosphor absorbs the excitation light (the blue light) emitted from the light emitting element <NUM> and emits fluorescent light. The quantum-dot phosphor included in the color conversion section 125Y is, for example, a phosphor in a particle form that emits fluorescent light having a wavelength of yellow that is <NUM> or greater and <NUM> or less.

Thus, also in a case where the pixel 11Y including the color conversion section 125Y is provided, the pixel 11Y shares the first conductive layer 15a and the second electrode <NUM> with the other pixels 11R, 11B, and <NUM>, and one or multiple trenches 15t (light blocking sections 15w) are provided between the pixel 11Y and a pixel adjacent to the pixel 11Y. Accordingly, in each of the light emitting elements <NUM>, it is possible, by the light blocking section 15w, to reduce leakage of light emitted from the light emitting layer 15b into the first conductive layer 15a of the adjacent light emitting element <NUM>, while securing the current path P. As a result, it is possible to suppress optical crosstalk.

In Modification C described above, for example, as illustrated in <FIG>, the pixel chip <NUM> may include four pixels 11R, 11B, <NUM>, and 11W that differ from each other in the light emission color. Here, the pixel 11W is a pixel that emits white light, and includes a color conversion section 125W that converts blue light emitted from the light emitting element <NUM> into white light. In this case, the first electrode <NUM> of the light emitting element <NUM> included in the pixel 11W is electrically coupled to a W-electrode 13W of the wiring substrate <NUM> via a metal bump <NUM>.

For example, the color conversion section 125W includes a block with a less content of quantum-dot phosphors that absorb excitation light (blue light) and emit fluorescent light having the wavelength of yellow, as compared with the color conversion section 125Y in Modification C described above. For example, the color conversion section 125W emits white light by mixing the excitation light (the blue light) that passes through the color conversion section 125W and the fluorescent light having the wavelength of yellow emitted from the quantum-dot phosphors.

It is to be noted that, for example, the color conversion section 125W may include, for example, a block in which multiple quantum-dot phosphors that absorb excitation light (blue light) and emit fluorescent light having a wavelength of red and multiple quantum-dot phosphors that absorb excitation light (blue light) and emit fluorescent light having a wavelength of green are fixed with a resin binder. In this case, the color conversion section 125W emits white light, for example, by mixing the excitation light (the blue light) that passes through the color conversion section 125W and the fluorescent light having the wavelength of red and the fluorescent light having the wavelength of green that are emitted from the quantum-dot phosphors included in the block.

Thus, also in a case where the pixel 11W having the color conversion section 125W is provided, the pixel 11W shares the first conductive layer 15a and the second electrode <NUM> with the other pixels 11R, 11B, and <NUM>, and one or multiple trenches 15t (light blocking sections 15w) are provided between the pixel 11W and a pixel adjacent to the pixel 11W. Accordingly, in each of the light emitting elements <NUM>, it is possible, by the light blocking section 15w, to reduce leakage of light emitted from the light emitting layer 15b into the first conductive layer 15a of the adjacent light emitting element <NUM>, while securing the current path P. As a result, it is possible to suppress optical crosstalk.

In the embodiment and the modifications thereof described above, the pixel chip <NUM> includes the multiple light emitting elements <NUM> that emit blue light. For example, as illustrated in <FIG>, <FIG>, however, the pixel chip <NUM> may include multiple light emitting elements <NUM> that emit ultraviolet light having a light emission wavelength of <NUM> or greater and <NUM> or less. The light emitting element <NUM> has a configuration similar to that of the light emitting element <NUM> except for including a light emitting layer 15b that emits ultraviolet light.

In the present modification, for example, as illustrated in <FIG>, and <FIG>, the pixel <NUM> includes the color conversion section <NUM>. For example, as illustrated in <FIG>, the pixel 11B includes the color conversion section 125B. For example, as illustrated in <FIG>, and <FIG>, the pixel 11R includes the color conversion section 125R. For example, as illustrated in <FIG> and <FIG>, the pixel 11Y includes the color conversion section 125Y. For example, as illustrated in <FIG>, the pixel 11W includes the color conversion section 125W.

For example, each of the color conversion sections <NUM>, 125R, 125B, and 125W absorbs excitation light (ultraviolet light) emitted from the light emitting element <NUM> and performs wavelength conversion thereon. Each of the color conversion sections <NUM>, 125R, 125B, and 125W may further include, for example, a light scatterer that scatters the excitation light (the ultraviolet light) emitted from the light emitting element <NUM>. The light scatterer includes, for example, a material having a refractive index different from a refractive index of the resin included in the color conversion sections <NUM>, 125R, 125B, and 125W.

The quantum-dot phosphor absorbs the excitation light (the ultraviolet light) emitted from the light emitting element <NUM> and emits fluorescent light. The quantum-dot phosphor included in the color conversion section <NUM> is, for example, a phosphor in a particle form that emits fluorescent light having a wavelength of green that is <NUM> or greater and <NUM> or less. The quantum-dot phosphor included in the color conversion section 125B is, for example, a phosphor in a particle form that emits fluorescent light having a wavelength of blue that is <NUM> or greater and <NUM> or less. The quantum-dot phosphor included in the color conversion section 125R is, for example, a phosphor in a particle form that emits fluorescent light having a wavelength of red that is <NUM> or greater and <NUM> or less. The quantum-dot phosphor included in the color conversion section 125Y is, for example, a phosphor in a particle form that emits fluorescent light having a wavelength of yellow that is <NUM> or greater and <NUM> or less. The quantum-dot phosphor included in the color conversion section 125W is, for example, a phosphor in a particle form that emits fluorescent light having the wavelength of yellow that is <NUM> or greater and <NUM> or less. The multiple quantum-dot phosphors included in the color conversion section 125W may include, for example, multiple phosphors in a particle form that emit fluorescent light having the wavelength of red that is <NUM> or greater and <NUM> or less and multiple phosphors in a particle form that emit fluorescent light having the wavelength of green that is <NUM> or greater and <NUM> or less.

The quantum-dot phosphor includes, for example, a solid solution or a multilayered structure including one or more kinds of materials selected from CdS, CdSe, ZnS, ZnSe, InAgS, and CsPbClxBr<NUM>-x. For example, the quantum dot phosphor may be a material obtained by dispersing phosphor particles of an oxide, a fluoride, or a nitride and solidifying them, or may be an organic phosphor.

The resin to be mixed with the quantum dot phosphors is a resin for uniformly dispersing the quantum dot phosphors, and includes, for example, a material having light transparency for light (ultraviolet light) emitted from the light emitting element <NUM>. The resin to be mixed with the quantum dot phosphors includes, for example, an acrylic-based, epoxy-based, or silicone-based resin material.

The light emitting elements <NUM> of the pixel chip <NUM> share the second electrode <NUM> with each other. In addition, the light emitting elements <NUM> of the pixel chip <NUM> share the first conductive layer 15a with each other. That is, in the pixel chip <NUM>, the first conductive layers 15a of the respective light emitting elements <NUM> are integrally formed. Each of the light emitting elements <NUM> includes a current path P in the first conductive layer 15a from a portion opposed to the first electrode <NUM> to a portion opposed to the second electrode <NUM>. The first conductive layer 15a is provided with one or multiple trenches 15t in a region between two current paths P adjacent to each other. A light blocking section 15w is provided in each of the trenches 15t formed in the first conductive layer 15a.

Next, an operation of the display apparatus <NUM> according to the present modification is described.

Each of the light emitting elements <NUM> in the pixel chip <NUM> is driven by the gate driver <NUM> and the data driver <NUM> to thereby emit ultraviolet light Luv having a predetermined light emission intensity, for example, as illustrated in <FIG>. The ultraviolet light Luv emitted from the first light emitting element <NUM> in the pixel chip <NUM> is converted into green light LG by the color conversion section <NUM>, and the converted light (the green light LG) is emitted to the outside as light of the pixel <NUM>. In addition, the ultraviolet light Luv emitted from the second light emitting element <NUM> in the pixel chip <NUM> is converted into blue light LB by the color conversion section 125B, and the converted light (the blue light LB) is emitted to the outside as light of the pixel 11B. The ultraviolet light Luv emitted from the third light emitting element <NUM> in the pixel chip <NUM> is converted into red light LR by the color conversion section 125R, and the converted light (the red light LR) is emitted to the outside as light of the pixel 11R. Three pieces of light (the green light LG, the blue light LB, and the red light LR) that differ from each other in the light emission color are emitted at predetermined respective intensities from each of the pixel chips <NUM> disposed on the mounting substrate 110A. The three pieces of light (the green light LG, the blue light LB, and the red light LR) that differ from each other in the light emission color and are emitted from each of the pixel chips <NUM> disposed on the mounting substrate 110A form image light. Entering of the image light into the retina of the user allows the user to recognize that an image is displayed on the display panel <NUM>.

Each of the light emitting elements <NUM> in the pixel chip <NUM> is driven by the gate driver <NUM> and the data driver <NUM> to thereby emit ultraviolet light Luv having a predetermined light emission intensity, for example, as illustrated in <FIG>. The ultraviolet light Luv emitted from the first light emitting element <NUM> in the pixel chip <NUM> is converted into green light LG by the color conversion section <NUM>, and the converted light (the green light LG) is emitted to the outside as light of the pixel <NUM>. In addition, the ultraviolet light Luv emitted from the second light emitting element <NUM> in the pixel chip <NUM> is converted into blue light LB by the color conversion section 125B, and the converted light (the blue light LB) is emitted to the outside as light of the pixel 11B. The ultraviolet light Luv emitted from the third light emitting element <NUM> in the pixel chip <NUM> is converted into red light LR by the color conversion section 125R, and the converted light (the red light LR) is emitted to the outside as light of the pixel 11R. The ultraviolet light Luv emitted from the fourth light emitting element <NUM> in the pixel chip <NUM> is converted into yellow light LY by the color conversion section 125Y, and the converted light (the yellow light LY) is emitted to the outside as light of the pixel 11Y. Four pieces of light (the green light LG, the blue light LB, the red light LR, and the yellow light LY) that differ from each other in the light emission color are emitted at predetermined respective intensities from each of the pixel chips <NUM> disposed on the mounting substrate 110A. The four pieces of light (the green light LG, the blue light LB, the red light LR, and the yellow light LY) that differ from each other in the light emission color and are emitted from each of the pixel chips <NUM> disposed on the mounting substrate 110A form image light. Entering of the image light into the retina of the user allows the user to recognize that an image is displayed on the display panel <NUM>.

Each of the light emitting elements <NUM> in the pixel chip <NUM> is driven by the gate driver <NUM> and the data driver <NUM> to thereby emit ultraviolet light Luv having a predetermined light emission intensity, for example, as illustrated in <FIG>. The ultraviolet light Luv emitted from the first light emitting element <NUM> in the pixel chip <NUM> is converted into blue light LB by the color conversion section 125B, and the converted light (the blue light LB) is emitted to the outside as light of the pixel 11B. The ultraviolet light Luv emitted from the second light emitting element <NUM> in the pixel chip <NUM> is converted into yellow light LY by the color conversion section 125Y, and the converted light (the yellow light LY) is emitted to the outside as light of the pixel 11Y. Two pieces of light (the blue light LB and the yellow light LY) that differ from each other in the light emission color are emitted at predetermined respective intensities from each of the pixel chips <NUM> disposed on the mounting substrate 110A. The two pieces of light (the blue light LB and the yellow light LY) that differ from each other in the light emission color and are emitted from each of the pixel chips <NUM> disposed on the mounting substrate 110A form image light. Entering of the image light into the retina of the user allows the user to recognize that an image is displayed on the display panel <NUM>.

Each of the light emitting elements <NUM> in the pixel chip <NUM> is driven by the gate driver <NUM> and the data driver <NUM> to thereby emit ultraviolet light Luv having a predetermined light emission intensity, for example, as illustrated in <FIG>. The ultraviolet light Luv emitted from the first light emitting element <NUM> in the pixel chip <NUM> is converted into green light LG by the color conversion section <NUM>, and the converted light (the green light LG) is emitted to the outside as light of the pixel <NUM>. In addition, the ultraviolet light Luv emitted from the second light emitting element <NUM> in the pixel chip <NUM> is converted into blue light LB by the color conversion section 125B, and the converted light (the blue light LB) is emitted to the outside as light of the pixel 11B. The ultraviolet light Luv emitted from the third light emitting element <NUM> in the pixel chip <NUM> is converted into red light LR by the color conversion section 125R, and the converted light (the red light LR) is emitted to the outside as light of the pixel 11R. The ultraviolet light Luv emitted from the fourth light emitting element <NUM> in the pixel chip <NUM> is converted into white light LY by the color conversion section 125W, and the converted light (the white light Lw) is emitted to the outside as light of the pixel 11W. Four pieces of light (the green light LG, the blue light LB, the red light LR, and the white light Lw) that differ from each other in the light emission color are emitted at predetermined respective intensities from each of the pixel chips <NUM> disposed on the mounting substrate 110A. The four pieces of light (the green light LG, the blue light LB, the red light LR, and the white light Lw) that differ from each other in the light emission color and are emitted from each of the pixel chips <NUM> disposed on the mounting substrate 110A form image light. Entering of the image light into the retina of the user allows the user to recognize that an image is displayed on the display panel <NUM>.

In the present modification, as with the embodiment and the modifications thereof described above, in each of the light emitting elements <NUM>, it is possible, by the light blocking section 15w, to reduce leakage of light emitted from the light emitting layer 15b into the first conductive layer 15a of the adjacent light emitting element <NUM>, while securing the current path P. As a result, it is possible to suppress optical crosstalk.

In the embodiment and the modifications thereof described above, for example, as illustrated in <FIG>, the pixel chip <NUM> may include a color filter <NUM> above the optical element <NUM> and an optical member 125a provided for each pixel. The optical member 125a is, for example, a member corresponding to the color conversion section <NUM>, the color conversion section 125R, or the color conversion section 125Y, and may include a protection layer <NUM> on an as-needed basis.

The color filter <NUM> provided immediately above the member corresponding to the color conversion section <NUM> is a member that selectively transmits green light included in the light emitted from the member corresponding to the color conversion section <NUM>. The color filter <NUM> provided immediately above the member corresponding to the color conversion section 125R is a member that selectively transmits red light included in the light emitted from the member corresponding to the color conversion section 125R. The color filter <NUM> provided immediately above the member corresponding to the color conversion section 125Y is a member that selectively transmits yellow light included in the light emitted from the member corresponding to the color conversion section 125Y. That is, the color filter <NUM> is a filter that attenuates a blue light component emitted from the light emitting element <NUM> and leaked from the optical member 125a.

In the present modification, the color filter <NUM> that attenuates the blue light component leaked from the optical member 125a is provided. This makes it possible to provide the user with image light having high color purity.

In the embodiment and the modifications thereof described above, for example, as illustrated in <FIG>, the pixel chip <NUM> may include a color filter <NUM> above an optical element <NUM> and an optical member 125b provided for each pixel. The optical member 125b is, for example, a member corresponding to the color conversion section <NUM>, the color conversion section 125B, the color conversion section 125R, the color conversion section 125Y, or the color conversion section 125W, and may include a protection layer <NUM> on an as-needed basis.

The color filter <NUM> provided immediately above the member corresponding to the color conversion section <NUM> is a member that selectively transmits green light included in the light emitted from the member corresponding to the color conversion section <NUM>. The color filter <NUM> provided immediately above the member corresponding to the color conversion section 125B is a member that selectively transmits blue light included in the light emitted from the member corresponding to the color conversion section 125B. The color filter <NUM> provided immediately above the member corresponding to the color conversion section 125R is a member that selectively transmits red light included in the light emitted from the member corresponding to the color conversion section 125R. The color filter <NUM> provided immediately above the member corresponding to the color conversion section 125Y is a member that selectively transmits yellow light included in the light emitted from the member corresponding to the color conversion section 125Y. The color filter <NUM> provided immediately above the member corresponding to the color conversion section 125W is a member that selectively transmits blue light, red light, and green light included in the light emitted from the member corresponding to the color conversion section 125W. That is, the color filter <NUM> is a filter that attenuates an ultraviolet light component emitted from the light emitting element <NUM> and leaked from the optical member 125b.

In the present modification, the color filter <NUM> that attenuates the ultraviolet light component leaked from the optical member 125b is provided. This makes it possible to provide the user with image light having less ultraviolet component that can adversely influence the user's eyes.

It is to be noted that, in the present modification, the color filter <NUM> provided immediately above the member corresponding to the color conversion section <NUM>, 125R, or 125Y may be a filter that attenuates not only the ultraviolet light component but also the blue light component. In this case, it is possible to provide the user with image light that has less ultraviolet light component that can adversely influence the user's eyes and also has high color purity.

In the embodiment and the modifications thereof described above, the light transmitting section 125C may be provided for at least one light emitting element <NUM>. The light transmitting section 125C transmits light emitted from the light emitting element <NUM>. In such a case, it is possible to provide a pixel having a color component of the light emitted from the light emitting element <NUM> in the pixel chip <NUM> without using a phosphor. Therefore, it is possible to obtain a pixel having a desired light emission intensity that does not depend on the conversion efficiency of the phosphor or the like.

Although the present disclosure has been described above with reference to the embodiments, the present disclosure is not limited to the embodiments described above and various modifications can be made. It is to be noted that the effects described herein are mere examples. The effects of the present disclosure are not limited to the effects described herein. The present disclosure may have effects other than the effects described herein.

According to the light emitting device and the display apparatus according to one aspect of the present disclosure, the first conductive layer is provided with the one or multiple trenches in the region between the two current paths adjacent to each other, and the light blocking section is provided in the one or multiple trenches. Accordingly, it is possible to reduce, by the light blocking section, leakage of light emitted from the light emitting layer into the first conductive layer of the adjacent light emitting element while securing the current path in each of the light emitting elements. As a result, it is possible to suppress optical crosstalk, as compared with a case where such a light blocking section is not provided. It is to be noted that the effects of the present disclosure are not necessarily limited to the effects described here and may include any of the effects described herein.

The present application claims the priority on the basis of <CIT>.

Claim 1:
A light emitting device (<NUM>) comprising
multiple light emitting elements (<NUM>) each including a semiconductor layer (15a-c) and each including a first electrode (<NUM>) and a second electrode (<NUM>), the semiconductor layer including a first conductive layer (15a), a light emitting layer (15b), and a second conductive layer (15c) that are stacked in this order, the first conductive layer having a light emitting surface (<NUM>),
the first electrode being in contact with the second conductive layer, the second electrode being in contact with the first conductive layer, the multiple light emitting elements each emitting light from the light emitting layer via the light emitting surface, wherein
the light emitting elements share the first conductive layer and the second electrode with each other,
the light emitting elements each include a current path (P) in the first conductive layer from a portion opposed to the first electrode to a portion opposed to the second electrode,
the first conductive layer has one or multiple trenches (15t), and
the light emitting device further includes a first light blocking section (15w) provided in the one or multiple trenches,
characterised in that the one or multiple trenches are in a region between two current paths adjacent to each other.