Electro-optical device, method for manufacturing electro-optical device, and electronic apparatus

There is provided an electro-optical device including a light-emitting element, a sealing layer that covers the light-emitting element, a first color filter transmits light in a first wavelength region, and a second color filter that is formed on the sealing layer and the first color filter and transmits light in a second wavelength region, in which the light in the first wavelength region has higher visibility than the light in the second wavelength region, and the first color filter is first formed on the sealing layer.

BACKGROUND

1. Technical Field

The present invention relates to an electro-optical device, a method for manufacturing an electro-optical device, and an electronic apparatus.

2. Related Art

In an electro-optical device including a light-emitting element such as an organic electro luminescent (EL) element, in order to realize color display, a configuration is known in which a color filter that transmits light in a desired wavelength region is provided on a sealing layer that covers the light-emitting element. For example, in JP-A-2010-237384 and JP-A-2004-227851, a configuration in which a red color filter for transmitting red light is stacked on a sealing layer covering a light-emitting element, a green color filter for transmitting green light is stacked on the sealing layer and the red color filter, and a blue color filter that transmits blue light is stacked on the sealing layer, the red color filter, and the green color filter is disclosed.

By the way, in the process of forming a color filter, it is common to suppress the temperature of the process to a low temperature (for example, 110 degrees or less) in order to prevent deterioration of the light-emitting element due to heat. However, in a case where the color filter is formed at a low temperature, the bonding strength between the color filter and the sealing layer becomes weaker as compared with the case where the color filter is formed at a high temperature. Therefore, after forming the color filter, a part or all of the color filter may be peeled off from the sealing layer in some cases.

In particular, in a case where peeling-off occurs in a color filter that transmits light with high visibility, for example, a green color filter that transmits green light, there is a problem that the possibility that the peeling-off of the color filter is visually recognized as a color change becomes higher as compared with the case where peeling-off occurs in a color filter that transmits light with low visibility.

SUMMARY

An advantage of some aspects of the invention is to provide a technique capable of reducing the possibility that a color change due to peeling-off of a color filter is visually recognized.

According to an aspect of the invention, there is provided an electro-optical device including a light-emitting element, a sealing layer that covers the light-emitting element, a first color filter and transmits light in a first wavelength region, and a second color filter that is formed on the sealing layer and the first color filter and transmits light in a second wavelength region, in which the light in the first wavelength region has higher visibility than the light in the second wavelength region, and the first color filter is first formed on the sealing layer.

According to the aspect of the invention, at least a part of the first color filter may be protected by the second color filter by forming the second color filter that transmits light with low visibility on the first color filter that transmits light with high visibility. According to the invention, it is possible to reduce the possibility of peeling-off in the first color filter while increasing the possibility of peeling-off in the second color filter as compared with the case where the first color filter is formed on the second color filter. Then, the possibility that peeling-off of the first color filter is visually recognized as a color change is higher than the possibility that peeling-off of the second color filter is visually recognized as a color change. Therefore, according to the invention, it is possible to reduce the possibility that the peeling-off is recognized as a color change in a case where peeling-off occurs in the color filter layer including the first color filter and the second color filter.

The above-described electro-optical device may include a third color filter transmits light in a third wavelength region, in which the light in the first wavelength region has higher visibility than the light in the third wavelength region, and the third color filter is formed on the sealing layer, the first color filter, and the second color filter.

According to this aspect, at least a part of the first color filter may be protected by the second color filter and the third color filter by forming the second color filter and the third color filter that transmit light with low visibility on the first color filter that transmits light with high visibility. Therefore, it is possible to relatively reduce the probability of peeling-off occurring in the first color filter with respect to the probability of peeling-off occurring in the color filter layer including the first color filter, the second color filter, and the third color filter. In this way, it is possible to reduce the possibility that the peeling-off is visually recognized as a color change in a case where peeling-off occurs in the color filter layer.

In the electro-optical device described above, the light in the first wavelength region may be green light, the light in the second wavelength region may be blue light, and the light in the third wavelength region may be red light.

According to this aspect, at least a part of the first color filter may be protected by the second color filter and the third color filter by forming the second color filter that transmits blue light with lower visibility compared to green light and the third color filter that transmits red light with lower visibility compared to green light on the first color filter that transmits green light with high visibility. Therefore, it is possible to reduce the possibility that the peeling-off is visually recognized as a color change in a case where peeling-off occurs in the color filter layer.

In the electro-optical device described above, the first color filter and the second color filter and third color filter satisfies the following relation, Zg<Zb<Zr, where a maximum value of the thickness of the first color filter is Zg, a maximum value of the thickness of the second color filter is Zb, a maximum value of the thickness of the third color filter is Zr.

According to this aspect, since the second color filter is made thicker than the first color filter, it is possible to reduce the possibility that the peeling-off is recognized as a color change even if peeling-off occurs in the second color filter. Similarly, since the third color filter is made thicker than the second color filter, it is possible to reduce the possibility that the peeling-off is recognized as a color change even if peeling-off occurs in the third color filter.

The electro-optical device includes a convex portion that is provided between the sealing layer and the first color filter, that is, between the sealing layer and the second color filter.

According to this aspect, it is possible to suppress deterioration in display quality due to the fact that the second color filter is formed at a position where the first color filter is to be formed and the first color filter is formed at a position where the second color filter is to be formed.

In the electro-optical device described above, the convex portion may include a light-transmitting photosensitive resin material, and the first color filter may include a coloring material and the photosensitive resin material.

According to this aspect, since the first color filter and the convex portion are formed using the same photosensitive resin material, it is possible to increase the bonding strength of the first color filter and the convex portion and it is possible to reduce the possibility that the first color filter peels off from the sealing layer as compared with the case where the first color filter and the convex portion are formed using different materials.

In addition, according to another aspect of the invention, there is provided a method for manufacturing an electro-optical device including: forming a first color filter that transmits light in the first wavelength region on a sealing layer that covers the light-emitting element, forming a second color filter that transmits light in the second wavelength region on the sealing layer and the first color filter, and forming a third color filter that transmits light in a third wavelength region on the sealing layer, the first color filter, and the second color filter, in which the light in the first wavelength region has higher visibility than the light in the second wavelength region and the light in the third wavelength region.

According to the aspect of the invention, since at least a part of the first color filter is protected by the second color filter and the possibility of peeling-off in the first color filter may be reduced, it is possible to reduce the possibility that the peeling-off is visually recognized as a color change in a case where peeling-off occurs in the color filter layer including the first color filter and the second color filter.

Furthermore, in addition to the electro-optical device, the invention may be conceived as an electronic apparatus equipped with the electro-optical device. Typical examples of the electronic apparatus include display devices such as a head-mounted display (HMD) and an electronic viewfinder.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings. However, in each view, the dimensions and the scale of each unit are appropriately different from the actual ones. In addition, since the embodiments described below are preferred specific examples of the invention, various technically preferable limitations are given, but in the following description, the scope of the invention is not limited to these forms unless otherwise stated to limit the invention.

Hereinafter, an electro-optical device1according to the present embodiment will be described.

1. Outline of Electro-Optical Device

FIG. 1is a block view showing an example of a configuration of an electro-optical device1according to the embodiment.

As shown inFIG. 1, the electro-optical device1includes a display panel10having a plurality of pixels Px and a control circuit20controlling the operation of the display panel10.

Digital image data Video is supplied to the control circuit20from a host device (not shown) synchronously with the synchronization signal. Here, the image data Video is digital data that defines a gradation level to be displayed by each pixel Px of the display panel10. In addition, the synchronization signal is a signal including a vertical synchronization signal, a horizontal synchronization signal, a dot clock signal, and the like.

The control circuit20generates a control signal Ctr for controlling the operation of the display panel10based on the synchronization signal and supplies the generated control signal Ctr to the display panel10. In addition, the control circuit20generates an analog image signal Vid based on the image data Video and supplies the generated image signal Vid to the display panel10. Here, the image signal Vid is a signal that defines the luminance of the light-emitting element of the pixel Px so that each pixel Px displays the gradation specified by the image data Video.

As shown inFIG. 1, the display panel10includes M scanning lines13extending in an X direction and N data lines14extending in a Y direction, a display unit12having M×N pixels Px arranged in a matrix of M rows×N columns corresponding to the intersections of the scanning line13of M rows and the data line14of N columns, and a driving circuit11that drives the display unit12(M is a natural number of 1 or more. N is a natural number of 3 or more).

Hereinafter, in order to distinguish the plurality of pixels Px, a plurality of scanning lines13, and a plurality of data lines14from each other, from a +Y direction to a −Y direction, the rows are referred to as a first row, a second row, . . . , an M-th, and from a −X direction to a +X direction, the columns are referred to as a first column, a second column, . . . , an N-th column.

The plurality of pixels Px provided on the display unit12include a pixel PxR capable of displaying red (R), a pixel PxG capable of displaying green (G), and a pixel PxB capable of displaying blue (B). Then, in the embodiment, a case where k is a variable representing a natural number of a multiple of 3 that satisfies 3≤k≤N, the pixel PxR is arranged in a (k−2)th column among the first column to the N-th column, the pixel PxG is arranged in the (k−1)th column, and the pixel PxB is arranged in the k-th column is assumed as an example.

As shown inFIG. 1, the driving circuit11includes a scanning line driving circuit111and a data line driving circuit112.

The scanning line driving circuit111sequentially scans (selects) the scanning lines13of the first row to the M-th row. Specifically, the scanning line driving circuit111sequentially selects the scanning lines13for each horizontal scanning period in units of one frame by setting scanning signals Gw[1to Gw[M to be output to the respective scanning lines13of the first row to the M-th row to a predetermined selection potential sequentially in each horizontal scanning period. In other words, the scanning line driving circuit111selects the scanning line13of the m-th row in the m-th horizontal scanning period of one frame period by setting the scanning signal Gw[m to be output to the scanning line13of the m-th row to the predetermined selection potential (m is a natural number satisfying 1≤m≤M). The period of one frame is a period during which the electro-optical device1displays one image.

Based on the image signal Vid and the control signal Ctr supplied from the control circuit20, the data line driving circuit112generates analog data signals Vd[1to Vd[N that define the gradation to be displayed by each pixel P and outputs the generated data signals Vd[1to Vd[N to the N data lines14for each horizontal scanning period. In other words, in each horizontal scanning period, the data line driving circuit112outputs a data signal Vd[n (n is a natural number satisfying 1≤n≤N) to the data line14of the n-th column.

In the embodiment, the image signal Vid output from the control circuit20is an analog signal, but the image signal Vid output from the control circuit20may be a digital signal. In this case, the data line driving circuit112converts the image signal Vid to generate analog data signals Vd[1to Vd[N.

FIG. 2is an equivalent circuit view showing an example of a configuration of a pixel circuit100provided corresponding to each pixel Px in a one-to-one correspondence. In the embodiment, it is assumed that a plurality of pixel circuits100corresponding to the plurality of pixels Px are electrically identical to each other. InFIG. 2, the pixel circuit100provided corresponding to the pixel Px in the m-th row and the n-th column will be described by way of example.

The pixel circuit100includes a light-emitting element3included in the pixel Px corresponding to the pixel circuit100, a P-channel MOS type transistors41and42, and a storage capacitor43. One or both of the transistors41and42may be N-channel MOS type transistors. In addition, the transistors41and42may be thin film transistors or field effect transistors.

The light-emitting element3includes a pixel electrode31, a light-emitting function layer32, and a counter electrode33. The pixel electrode31functions as an anode for supplying holes to the light-emitting function layer32. The counter electrode33is electrically connected to a feeder line16set at a potential Vct which is a power source potential on the low potential side of the pixel circuit100and functions as a cathode for supplying electrons to the light-emitting function layer32. Then, the holes supplied from the pixel electrode31and the electrons supplied from the counter electrode33are coupled to the light-emitting function layer32, and the light-emitting function layer32emits white light.

As will be described later in detail, a red color filter8R is superimposed on the light-emitting element3(hereinafter, referred to as a light-emitting element3R) of the pixel PxR, In t of the pixel PxG, a green color filter8G is superimposed on the light-emitting element3(hereinafter, referred to as a light-emitting element3G), and a blue color filter8B is superimposed on a light-emitting element3(hereinafter, referred to as a light-emitting element3B) included in the pixel PxB. Therefore, full-color display is enabled by the pixel PxR, the pixel PxG, and the pixel PxB.

The gate of the transistor41is electrically connected to the scanning line13of the m-th row, one of the source and the drain is electrically connected to the data line14of the n-th column, and the other of the source and the drain is electrically connected to the gate of the transistor42and one of the two electrodes included in the storage capacitor43.

The gate of the transistor42is electrically connected to the other of the source or the drain of the transistor41and one electrode of the storage capacitor43, one of the source and the drain is electrically connected to a feeder line15set to a potential Ve1which is a power source potential on the high potential side of the pixel circuit100, and the other of the source and the drain is electrically connected to the pixel electrode31.

In the storage capacitor43, one of the two electrodes included in the storage capacitor43is electrically connected to the other of the source and the drain of the transistor41and the gate of the transistor42, and the other electrode of the two electrodes of the storage capacitor43is electrically connected to the feeder line15. The storage capacitor43functions as a storage capacitor for holding the potential of the gate of the transistor42.

When the scanning line driving circuit111sets the scanning signal Gw[m to a predetermined selection potential and selects the scanning line13of the m-th row, the transistor41provided in the pixel Px of the m-th row and the n-th column is turned on. Then, when the transistor41is turned on, the data signal Vd[n is supplied from the data line14of the n-th column to the gate of the transistor42. In this case, the transistor42supplies a current corresponding to the potential (to be precise, a potential difference between the gate and the source) of the data signal Vd[n supplied to the gate to the light-emitting element3. Then, the light-emitting element3emits light with luminance corresponding to the magnitude of the current supplied from the transistor42, that is, luminance corresponding to the potential of the data signal Vd[n.

Thereafter, in a case where the scanning line driving circuit111releases the selection of the scanning line13of the m-th row and the transistor41is turned off, the potential of the gate of the transistor42is held by the storage capacitor43. Therefore, even after the transistor41is turned off, the light-emitting element3may emit light with luminance corresponding to the data signal Vd[n].

2. Configuration of Display Unit

Hereinafter, the configuration of the display unit12according to the embodiment will be described with reference toFIGS. 3 and 4.

FIG. 3is a plan view showing an example of a schematic structure of the display unit12according to the embodiment.

Specifically,FIG. 3shows a case where a part of the display unit12is viewed in a plan view from a +Z direction (hereinafter, a +Z direction and a −Z direction are collectively referred to as a “Z-axis direction”), which is a direction in which the electro-optical device1emits light. The Z axis direction is a direction crossing the X-axis direction and the Y-axis direction.

As shown inFIG. 3, on the M light-emitting elements3G (+Z direction) included in the M pixels PxG arranged in the Y axis direction in the (k−1)th column of the display unit12, the green color filter8G (an example of a “first color filter”) is disposed so as to cover the M light-emitting elements3G. The color filter8G transmits green light (an example of “light in a first wavelength region”) at which the luminance of light having a wavelength of 540 nm is maximum. In addition, on the M light-emitting elements3B (+Z direction) included in the M pixels PxG arranged in the Y axis direction in the k-th column of the display unit12, the blue color filter8B (an example of a “second color filter”) is disposed so as to cover the M light-emitting elements3B. The color filter8B transmits blue light (an example of “light in a second wavelength region”) at which the luminance of light having a wavelength of 470 nm is maximum. In addition, on the M light-emitting elements3R (+Z direction) included in the M pixels PxR arranged in the Y axis direction in the (k−2)th column of the display unit12, the red color filter8R (an example of a “third color filter”) is disposed so as to cover the M light-emitting elements3B. The color filter8R transmits red light (an example of “light in the third wavelength region”) at which the luminance of light having a wavelength of 610 nm is maximum.

FIG. 4is an example of a partial cross-sectional view taken along a line IV-IV inFIG. 3of the display unit12, in which a cross section of the pixel PxR, a cross section of the pixel PxG, and a cross section of the pixel PxB are included.

As shown inFIG. 4, the display unit12includes an element substrate5, a counter substrate9, and an adhesive layer90provided between the element substrate5and the counter substrate9. In the embodiment, it is assumed that the electro-optical device1is a top emission type in which light is emitted from the counter substrate9side (+Z side).

The adhesive layer90is a transparent resin layer for bonding the element substrate5and the counter substrate9. The adhesive layer90is formed using a transparent resin material such as an epoxy resin or an acrylic resin, for example.

The counter substrate9is a transparent substrate disposed on the +Z side of the adhesive layer90. As the counter substrate9, for example, a quartz substrate, a glass substrate or the like may be adopted.

The element substrate5includes a substrate50, a reflective layer51, a distance adjusting layer52, a light-emitting layer30, a sealing layer60, and a color filter layer8stacked on the substrate50. Although details will be described later, the light-emitting layer30includes the light-emitting element3(3R,3G, and3B) described above. The light-emitting element3emits light in the +Z direction and the −Z direction. In addition, the color filter layer8includes the color filter8R, the color filter8G, and the color filter8B described above.

The substrate50is a substrate on which various wirings such as the scanning line13and the data line14, and various circuits such as the driving circuit11and the pixel circuit100are mounted. The substrate50may be any substrate as long as various wirings and various circuits may be mounted. As the substrate50, for example, a silicon substrate, a quartz substrate, a glass substrate, or the like may be adopted. On the +Z side of the substrate50, a reflective layer51is stacked.

The reflective layer51is a constituent element for reflecting the light emitted from the light-emitting element3of the light-emitting layer30to the +Z direction side. The reflective layer51is formed using a material with high reflectance, for example, aluminum, silver or the like. On the +Z side of the reflective layer51, the distance adjusting layer52is stacked.

The distance adjusting layer52is an insulating transparent layer for adjusting the optical distance between the light-emitting element3and the reflective layer51of the light-emitting layer30. The distance adjusting layer52is formed using an insulating transparent material, for example, silicon oxide (SiOx) or the like. On the +Z side of the distance adjusting layer52, the light-emitting layer30is laminated.

The light-emitting layer30includes the pixel electrode31stacked on the distance adjusting layer52, an insulating film34stacked on the distance adjusting layer52and the pixel electrode31, the light-emitting function layer32stacked so as to cover the pixel electrode31and the insulating film34, and the counter electrode33stacked on the light-emitting function layer32.

The pixel electrode31is a transparent layer having conductivity formed in an island shape individually for each pixel Px. The pixel electrode31is formed using a conductive transparent material, for example, ITO Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), or the like.

The insulating film34is an insulating constituent element arranged so as to cover the peripheral portion of each pixel electrode31. The insulating film34is formed using an insulating material, for example, silicon oxide or the like.

The counter electrode33is a conductive constituent element having optical transparency and light reflectivity disposed so as to straddle the plurality of pixels Px. The counter electrode33is formed using, for example, an alloy of Mg and Ag or the like.

The light-emitting function layer32includes a hole injecting layer, a hole transporting layer, an organic light-emitting layer, and an electron transporting layer and is disposed so as to extend over a plurality of pixels Px. As described above, in the light-emitting function layer32, holes are supplied from a portion of the pixel electrode31that is not covered with the insulating film34and emits white light. That is, in the plan view, the portion of the light-emitting layer30where the pixel electrode31is not covered with the insulating film34corresponds to the light-emitting element3. In addition, in the embodiment, in the plan view, the portion where the light-emitting element3is provided is regarded as the pixel Px. In other words, in the plan view, the insulating film34is disposed so as to partition the plurality of pixels Px of the display unit12from each other. The white light emitted from the light-emitting element3is light including red light, green light, and blue light.

In the embodiment, the film thickness of the distance adjusting layer52is adjusted so that an optical resonance structure is formed by the reflective layer51and the counter electrode33. Then, the light emitted from the light-emitting function layer32is repeatedly reflected between the reflective layer51and the counter electrode33to amplify the intensity of light having a wavelength corresponding to the optical distance between the reflective layer51and the counter electrode33, and the amplified light is emitted to the +Z side to the counter substrate9via the counter electrode33.

In the embodiment, as an example, the film thickness of the distance adjusting layer52is set for each pixel Px so that the light having a wavelength of 610 nm is amplified in the pixel PxR, the light having a wavelength of 540 nm is amplified in the pixel PxG, and the light having a wavelength of 470 nm is amplified in the pixel PxB. For this reason, in the embodiment, red light with the maximum luminance of light having the wavelength of 610 nm is emitted from the pixel PxR, green light with the maximum luminance of light having the wavelength of 540 nm is emitted from the pixel PxG, and blue light with the maximum luminance of the light having the wavelength of 470 nm is emitted from the pixel PxB.

The sealing layer60includes a lower sealing layer61stacked on the counter electrode33, a planarizing layer62stacked on the lower sealing layer61, and an upper sealing layer63stacked on the planarizing layer62.

The lower sealing layer61and the upper sealing layer63are transparent layers having insulating properties and disposed so as to extend over the plurality of pixels Px. The lower sealing layer61and the upper sealing layer63are constituent elements for inhibiting entry of moisture, oxygen, or the like into the light-emitting layer30and are formed using an inorganic material such as silicon oxide (SiOx), silicon nitride (SiNx), or aluminum oxide (AlxOy), for example.

The planarizing layer62is a transparent layer disposed so as to straddle the plurality of pixels Px and is a constituent element for providing a flat upper surface (a surface on the +Z side). The planarizing layer62is formed using, for example, a resin material such as an epoxy resin, an acrylic resin, a urethane resin, a silicon resin, or an inorganic material such as silicon oxide.

The color filter layer8includes the color filter8R, the color filter8G, and the color filter8B.

As shown inFIG. 4, the color filter8G is formed on the upper sealing layer63so as to cover the light-emitting element3G in a plan view on the +Z side of the light-emitting element3G. In addition, the color filter8B is formed on the upper sealing layer63and the color filter8G so as to cover the light-emitting element3B in a plan view on the +Z side of the light-emitting element3B. In addition, the color filter8R is formed on the upper sealing layer63, the color filter8G, and the color filter8R so as to cover the light-emitting element3R in a plan view on the +Z side of the light-emitting element3R.

The color filter8R is formed of a photosensitive resin material containing a red coloring material, the color filter8G is formed of a photosensitive resin material containing a green coloring material, and the color filter8B is formed of a photosensitive resin material containing a blue coloring material.

As shown inFIG. 4, the adhesive layer90is provided on the +Z side of the color filter layer8so as to cover the color filter layer8, and the counter substrate9is provided on the +Z side of the adhesive layer90.

In the embodiment, as shown inFIG. 4, the color filter layer8is formed so that the relationship shown in the following equation (1) is established between a maximum value Zr of the thickness of the color filter8R in the Z axis direction, a maximum value Zg of the thickness of the color filter8G in the Z axis direction, and a maximum value Zb of the thickness of the color filter8B in the Z axis direction.
Zg<Zb<Zr(1)

More specifically, in the embodiment, as an example, the color filter layer8is formed so as to satisfy that the thickness Zr is 1.0 μm≤Zr≤1.5 μm, the thickness Zg is 0.5 μm≤Zg≤1.2 μm, the thickness Zb is 0.8 μm≤Zb≤1.3 μm, and the relationship of the above equation (1).

In addition, the green light transmitted through the color filter8G has higher visibility than the red light transmitted through the color filter8R, and the red light transmitted through the color filter8R has higher visibility than the blue light transmitted through the color filter8B. For this reason, in the embodiment, when viewed in a plan view, each pixel Px is formed so that the pixel PxR has an area larger than the pixel PxG and the pixel PxB has an area larger than the pixel PxR. Specifically, in the embodiment, each pixel Px is formed so that the relationship shown in the following equation (2) is established between a width Xr of the pixel PxR in an X-axis direction, a width Xg of the pixel PxG in the X-axis direction, and a width Xb of the pixel PxB in the X-axis direction.
Xg<Xr<Xb(2)

3. Method for Manufacturing Electro-Optical Device

Hereinafter, an example of a method for manufacturing the electro-optical device1according to the embodiment will be described with reference toFIGS. 5 to 8.

FIG. 5is a flowchart for explaining an example of a method for manufacturing the electro-optical device1. As shown inFIG. 5, the method for manufacturing the electro-optical device1includes forming the reflective layer51on the substrate50(S1), forming the distance adjusting layer52on the reflective layer51(S2), forming the light-emitting layer30on the distance adjusting layer52(S3); forming the sealing layer60on the light-emitting layer30(S4), forming the color filter8G on the +Z side of the light-emitting element3G of the light-emitting layer30on the upper sealing layer63of the sealing layer60(S5), forming the color filter8B on the +Z side of the light-emitting element3B having the light-emitting layer30on the upper sealing layer63and on the color filter8G (S6), forming the color filter8R on the +Z side of the light-emitting element3R having the light-emitting layer30on the upper sealing layer63, the color filter8G, and the color filter8B (S7), and forming the adhesive layer90on the color filter layer8and bonding the element substrate5and the counter substrate9with the adhesive layer90(S8).

An example of steps S5to S7, which is a manufacturing process of the color filter layer8out of the above steps S1to S8, will be described below.

In step S5, first, a photosensitive resin material containing a green coloring material is applied onto the upper sealing layer63by a spin coating method and dried, whereby a green photosensitive resin layer is formed. Next, a portion of the green photosensitive resin layer forming the color filter8G is irradiated with light and exposed, and a developing solution or the like is discharged to the photosensitive resin layer, whereby the unexposed photosensitive resin layer is removed. Thereafter, by burning and curing the green photosensitive resin layer, as shown inFIG. 6, the color filter8G is formed on the upper sealing layer63.

In the step S6, first, a photosensitive resin material containing a blue coloring material is applied onto the upper sealing layer63and the color filter8G by the spin coat method and dried, whereby a blue photosensitive resin layer is formed. Next, a portion of the blue photosensitive resin layer forming the color filter8B is irradiated with light and exposed, and a developing solution or the like is discharged to the photosensitive resin layer, whereby the unexposed photosensitive resin layer is removed. Thereafter, by burning and curing the green photosensitive resin layer, as shown inFIG. 7, the color filter8B is formed on the upper sealing layer63and the color filter8B.

In the step S7, first, a photosensitive resin material containing a red coloring material is applied onto the upper sealing layer63, the color filter8G, and the color filter8B by the spin coat method and dried, whereby a red photosensitive resin layer is formed. Next, a portion of the red photosensitive resin layer forming the color filter8R is irradiated with light and exposed, and a developing solution or the like is discharged to the photosensitive resin layer, whereby the unexposed photosensitive resin layer is removed. Thereafter, by burning and curing the green photosensitive resin layer, as shown inFIG. 8, the color filter8B is formed on the upper sealing layer63, the color filter8G, the color filter8B, and the color filter8R.

4. Effect of Embodiment

As described above, the green light transmitted through the color filter8G has high visibility compared to the blue light transmitted through the color filter8B or the red light transmitted through the color filter8R. Therefore, in a case where a part of the color filter8G, for example, the color filter8G having a predetermined area in a plan view is peeled off, there is a high possibility that a color change due to peeling-off is visually recognized as compared with the case where the color filter8B having a predetermined area or the color filter8R having a predetermined area is peeled off.

In addition, as described above, the area of the color filter8G in a plan view is smaller than the area of the color filter8B when viewed in a plan view and the area of the color filter8R when viewed in a plan view. Therefore, in a case where a part of the color filter8G, for example, the color filter8G having a predetermined area in a plan view is peeled off, there is a high possibility that a color change due to peeling-off is visually recognized as compared with the case where the color filter8B having a predetermined area or the color filter8R having a predetermined area is peeled off.

That is, the possibility that a color change due to peeling-off of the color filter8G is visually recognized is higher than the possibility that a color change due to peeling-off of the color filter8B or the color filter8R is visually recognized.

On the other hand, in the embodiment, on the sealing layer60, first, the color filter8G is formed, the color filter8B is formed second, and the color filter8R is formed third. Therefore, at least a part of the color filter8G is covered with the color filter8B and the color filter8R. Therefore, at least a part of the color filter8G may be protected by the color filter8B and the color filter8R.

In this way, according to the embodiment, the possibility of peeling-off the color filter8G may be reduced as compared with the case where the color filter8G is not formed on the sealing layer60at the beginning. That is, it is possible to suppress the probability (relative probability) of peeling-off occurring in the color filter8G with respect to the probability of peeling-off occurring in the entire color filter layer8. In this way, even in a case where peeling-off occurs in the color filter layer8, the possibility that the peeling-off is visually recognized as a color change may be suppressed.

In addition, while the red light has a high possibility of being recognized as red light even if there is some change in the frequency of the light included in the red light, in a case where the frequency of the light included in the blue light is changed, the blue light has a high possibility of being visually recognized as light of a color other than blue, for example, green light. That is, the blue light has a higher possibility that the fluctuation of the light frequency is visually recognized as a color change as compared with the red light. Therefore, the possibility that a color change due to peeling-off of the color filter8B is visually recognized is higher than the possibility that a color change due to peeling-off of the color filter8R is visually recognized.

On the other hand, according to the embodiment, at least a part of the color filter8B is protected by the color filter8R by forming the color filter8R on at least a part of the color filter8B after forming the color filter8B. Therefore, according to the embodiment, it is possible to reduce the possibility of peeling-off in the color filter8B as compared with the case of forming the color filter8B on the color filter8R. In this way, even in a case where peeling-off occurs in the color filter layer8, the possibility that the peeling-off is visually recognized as a color change may be suppressed.

B. MODIFICATION EXAMPLE

Each of the above embodiments may be variously modified. Specific modification embodiments are exemplified below. Two or more embodiments arbitrarily selected from the following examples may be appropriately merged within a range not mutually contradictory. With respect to elements whose functions and functions are the same as those of the embodiment in the modification examples described below, the reference numerals referred to in the above description are used, and the detailed description thereof will be appropriately omitted.

Modification Example 1

In the above embodiment, in the display unit12, the color filter layer8is formed so as to cover the entirety of the sealing layer60, but the invention is not limited to such an aspect, and in the display unit12, a convex pattern7(an example of “convex portion”) may be formed between the sealing layer60and the color filter layer8.

FIG. 9is a plan view showing an example of a schematic structure of the display unit12according to a modification example 1.

As shown inFIG. 9, in the display unit12according to the present modification, a plurality of convex patterns7extending in the Y axis direction are provided between two light-emitting elements3adjacent in the X axis direction. More specifically, in the display unit12according to the modification example, (N−1) columns of convex patterns7are provided so as to divide the N columns of pixels Px from the first column to the N-th column from each other. However, the convex pattern7may be provided on one or both of the −X side than the first row and the +X side than the N-th column.

FIG. 10is an example of a partial cross-sectional view taken along the line X-X inFIG. 9of the display unit12according to modification example 1, in which the cross section of the pixel PxR, the cross section of the pixel PxG, and the cross section of the pixel PxB are included.

The convex pattern7is a transparent constituent element formed on the sealing layer60and includes a flat bottom surface71in contact with the sealing layer60and a curved upper surface72in contact with the color filter layer8. The shape of the convex pattern7shown inFIG. 10is an example, and the upper surface72of the convex pattern7may be a polyhedron or a shape having a corner.

The convex pattern7is formed using a transparent photosensitive resin material not containing a coloring material, for example, an acrylic resin. That is, the photosensitive resin material used as the material of the convex pattern7is the same material as the main material of the color filter layer8.

In this modification example, as shown inFIG. 10, the color filter8G is formed on the upper sealing layer63and on the convex pattern7. In addition, the color filter8B is formed on the upper sealing layer63, the convex pattern7, and the color filter8G. In addition, the color filter8R is formed on the upper sealing layer63, the convex pattern7, the color filter8G, and the color filter8B. That is, the convex pattern7between the pixel PxG and the pixel PxR is formed between the upper sealing layer63and the color filter8G and between the upper sealing layer63and the color filter8R. In addition, the convex pattern7between the pixel PxG and the pixel PxB is formed between the upper sealing layer63and the color filter8B and between the upper sealing layer63and the color filter8G. In addition, the convex pattern7between the pixel PxB and the pixel PxR is formed between the upper sealing layer63and the color filter8B and between the upper sealing layer63and the color filter8R.

FIG. 11is an explanatory view for explaining the sizes (width and thickness) of the convex pattern7and the color filter layer8.FIG. 11is a view in which the convex pattern7, the color filter layer8, and the upper sealing layer63are extracted from the partial cross-sectional view shown inFIG. 10.

In this modification example, as shown inFIG. 12, the convex pattern7and the color filter layer8are formed so that the relationship shown in the following equation (3) is established between the maximum value Zt of the thickness of the convex pattern7in the Z-axis direction, a maximum value Zr of the thickness of the color filter8R in the Z-axis direction, a maximum value Zg of the thickness of the color filter8G in the Z axis direction, and a maximum value Zb of the thickness of the color filter8B in the Z-axis direction.
Zt<Zg<Zb<Zr(3)

In addition, in this modification example, as shown inFIG. 12, the convex pattern7and the color filter layer8are formed so that the relationship shown in the following equation (4) is established between a width Xt in the X-axis direction at a portion where the convex pattern7and the upper sealing layer63are in contact with each other, a width Xr in the X-axis direction at a portion where the color filter8R and the upper sealing layer63are in contact with each other, a width Xg in the X-axis direction at a portion where the color filter8G and the upper sealing layer63are in contact with each other, and a width Xb in the X-axis direction at a portion where the color filter8B and the upper sealing layer63are in contact with each other.
Xt<Xg<Xr<Xb(4)

As described above, in this modification example, the convex pattern7is provided between the sealing layer60and the color filter layer8. As described above, the convex pattern7is mainly formed of a photosensitive resin material not containing a coloring material. Generally, the bonding strength of a resin material not containing a coloring material is stronger than the bonding strength of a resin material containing a coloring material. Therefore, as in this modification example, in a case where a constituent element (hereinafter, referred to as a “constituent on the sealing layer”) formed on the sealing layer60includes the convex pattern7containing no coloring material in addition to the color filter layer8containing a coloring material, the bonding strength of the constituent on the sealing layer to the sealing layer60may be increased as compared with the case where the sealing layer60is formed only from the color filter layer8containing a coloring material.

Therefore, according to this modification example, in the manufacturing process of the electro-optical device1or the like, it is possible to reduce the possibility that the components on the sealing layer such as the color filter layer8peel off from the sealing layer60.

In addition, in this modification example, the convex pattern7and the color filter layer8are formed using the same photosensitive resin material as a main component. Generally, the bonding strength between the constituent elements having the same main constituent is stronger than the bonding strength between constituent elements having different main constituents. Therefore, the bonding strength between the color filter layer8and the convex pattern7is stronger than the bonding strength between the color filter layer8and the sealing layer60. Therefore, as in this modification example, since the constituent on the sealing layer has the convex pattern7, it is possible to reduce the possibility that the color filter layer8peels off from the sealing layer60.

In addition, in this modification example, the convex pattern7is formed so that the upper surface72is a curved surface. Then, in a case where the upper surface72of the convex pattern7is a curved surface, the adhesiveness between the color filter layer8formed on the upper surface72and the convex pattern7is higher as compared with the case where the upper surface72of the convex pattern7has a shape having a corner like a polyhedron. Therefore, according to this modification example, it is possible to strengthen the bonding strength of the convex pattern7and the color filter layer8as compared with the case where the upper surface72of the convex pattern7has a corner. In this way, it is possible to reduce the possibility that the color filter layer8peels off from the convex pattern7and the sealing layer60.

Modification Example 2

In the embodiment and the modification examples described above, the color filter8R is formed on at least a part of the color filter8B after the color filter8B is formed, but the invention is not limited to such an embodiment, and after the color filter8R is formed, the color filter8B may be formed on at least a part of the color filter8R. That is, on the sealing layer60, the color filter8G may be formed first, the color filter8R may be formed second, and the color filter8B may be formed third.

In this modification example, the second formed color filter8R is an example of the “second color filter”, and the red light transmitted through the color filter8R is an example of “the light of the second wavelength region”. In addition, in this modification example, the third formed color filter8B is an example of the “third color filter”, and the blue light transmitted through the color filter8B is an example of “the light of the third wavelength region”.

Modification Example 3

In the embodiment and the modification examples described above, the color filter8B and the color filter8R are formed on at least a part of the color filter8G after the color filter8G is first formed on the sealing layer60, but the invention is not limited to such an embodiment, and only one of the color filter8B or the color filter8R may be formed on at least a part of the color filter8G after the color filter8G is formed at the beginning.

C. APPLICATION EXAMPLE

The electro-optical device1according to the embodiment and the modification examples described above may be applied to various electronic apparatuses. Hereinafter, the electronic apparatus according to the aspect of the invention will be described.

FIG. 12is a perspective view showing an appearance of a head-mounted display300as an electronic apparatus employing the electro-optical device1of the aspect of the invention. As shown inFIG. 12, the head-mounted display300includes a temple310, a bridge320, a projection optical system301L, and a projection optical system301R. Then, inFIG. 12, the electro-optical device1(not shown) for the left eye is provided behind the projection optical system301L, and the electro-optical device1(not shown) for the right eye is provided behind the projection optical system301R.

FIG. 13is a perspective view of a portable personal computer400employing the electro-optical device1. The personal computer400includes the electro-optical device1for displaying various images, and a main body unit403provided with a power switch401and a keyboard402.

As an electronic apparatus to which the electro-optical device1according to the aspect of the invention is applied, in addition to the apparatuses exemplified inFIGS. 12 and 13, it is also possible to use a portable telephone, a smartphone, a personal digital assistant (PDA), a digital still camera, a television, a video camera, a car navigation device, an in-vehicle display device (instrument panel), an electronic notebook, an electronic paper, a calculator, a word processor, a workstation, a video phone, a POS terminal, and the like. Furthermore, the electro-optical device1according to the invention may be applied as a display unit provided in an electronic apparatus such as a printer, a scanner, a copying machine, and a video player.

The entire disclosure of Japanese Patent Application No. 2016-222730, filed Nov. 15, 2016 is expressly incorporated by reference herein.