Light-emitting module and display apparatus

The present disclosure provides a light-emitting module and a display apparatus thereof. The light-emitting module includes a circuit substrate which includes a first surface and a second surface opposite to the first surface. The first surface includes a plurality of conductive channels, and the second surface includes a plurality of conductive pads. A plurality of light-emitting groups is arranged in a matrix on the first surface. Each of the light-emitting groups includes a red light-emitting diode chip, a green light-emitting diode chip, and a blue light-emitting diode chip. An electric component is disposed on the first surface and located in the light-emitting groups matrix. A translucent encapsulating component covers the plurality of light-emitting groups and the electric component. Wherein, the light-emitting groups matrix comprises m columns and n rows.

RELATED APPLICATION DATA

This disclosure claims the right of priority of CN Application No. 202010791217.4, filed on Aug. 7, 2020, and the content of which is hereby incorporated by reference in its entirety.

TECHNICAL FIELD

The present disclosure is related to a light-emitting module with a specific structure and a display apparatus incorporating such light-emitting module.

DESCRIPTION OF BACKGROUND ART

The light-emitting diode (LED) has special properties, such as low power consumption, low heat radiation, long lifetime, high impact resistance, small volume, and high responding speed so LED is widely used in applications requiring light-emitting elements, such as vehicle, household electric appliance, display, or lighting fixture.

Taking the display apparatus as an example, LEDs are able to emit monochromatic light so that they can be assembled as a full color pixel unit in the display apparatus by combining red, green, and blue LED chips which emit three primary colors.

SUMMARY OF THE DISCLOSURE

One main purpose of the present disclose is to form a compact arranged light-emitting module including a plurality of light-emitting modules which is suitable to display the information by taking advantage of the packaging technology. Besides, another main purpose is to add the sensing function and the function of interacting with the outside world.

The present disclosure provides a light-emitting module. The light-emitting module includes a circuit substrate which includes a first surface and a second surface opposite to the first surface. The first surface includes a plurality of conductive channels, and the second surface includes a plurality of conductive pads. A plurality of light-emitting groups is arranged in a matrix on the first surface. Each of the light-emitting groups includes a red light-emitting diode chip, a green light-emitting diode chip, and a blue light-emitting diode chip. An electric component is disposed on the first surface and located in the light-emitting groups matrix. A translucent encapsulating component covers the plurality of light-emitting groups and the electric component. Wherein, the light-emitting groups matrix comprises m columns and n rows.

Furthermore, the present disclosure also provides a display apparatus. The display apparatus includes a carrier and a plurality of light-emitting modules located on the carrier. Each of the plurality of light-emitting modules includes a first light-emitting module and a second light-emitting module. Wherein, the electric component of the first light-emitting module and the electric component of the second light-emitting module are different types of electric components.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The embodiments of the present disclosure are illustrated in details, and are plotted in the drawings. The same or the similar parts in the drawings and the specification have the same reference numeral. In the drawings, the shape and thickness of a specific element could be shrunk or enlarged. It should be noted that the element which is not shown in the drawings or described in the following description could be the structure well-known by the person having ordinary skill in the art.

FIG.1Adiscloses a schematic diagram of a light-emitting module100in accordance with one embodiment of the present disclosure,FIG.1Bis a top view thereof, andFIG.1Cis a bottom view thereof. The light-emitting module100includes a circuit substrate120, a first light-emitting group130, a second light-emitting group140, a third light-emitting group150, a fourth light-emitting group160, an electric component170, and a translucent encapsulating component180.

AsFIGS.1A and1Bshow, in the embodiment, the circuit substrate120is composed of an insulating substrate120′ and a top conductive layer120″, and the top conductive layer120″ includes a specific pattern. The circuit substrate120includes a first surface121and a second surface122opposite to the first surface121. The first surface121includes a plurality of conductive channels121A˜121J passing through the circuit substrate120. The first light-emitting group130, the second light-emitting group140, the third light-emitting group150, and the fourth light-emitting group160are arranged in 2 columns and 2 rows on the top conductive layer120″ to collectively form a light-emitting groups matrix500while each light-emitting group130,140,150, or160includes the light-emitting elements emitting different colors. To be more specific, each light emitting group130,140,150, or160includes a red light-emitting diode chip131,141,151, or161respectively, green light-emitting diode chip132,142,152, or162respectively, and blue light-emitting diode chip133,143,153, or163respectively. The electric component170is also arranged on the first surface121and is arranged in the light-emitting groups matrix500. To be more specific, the electric component170is arranged between the columns and rows of the light-emitting groups matrix500and therefore is located in the light-emitting groups130,140,150, or160. Besides, the translucent encapsulating component180is arranged on the first surface121and covers the light-emitting groups matrix500and the electric component170.

Referring toFIG.1C, a plurality of conductive pads122A˜122J are arranged on the second surface122, wherein the dotted circles121A˜121J represent the positions of the corresponding conductive channels121A˜121J which pass through from the first surface121of the circuit substrate120to the second surface122. As shown in the figure, each conductive pad122A˜122J connects to each conductive channel121A˜121J, respectively. Besides, the second surface122further includes a triangular conductive pad122K formed thereon. In this embodiment, there are 11 conductive pads formed on the second surface122of the light-emitting module100.

The conductive pad122K is disposed at the geometric center of the bottom view of the light-emitting module100; is separated from all other conductive pads122A˜122J physically and is not connected to any of the conductive channels121A˜121J electrically. When the overall structure of the light-emitting module100is mirror-symmetrical in appearance, it is difficult to distinguish the orientation of the light-emitting module100. In that case, the conductive pad122K with an orientational appearance can be served as an orientation indicator for the light-emitting module100. The orientational appearance is not limited to be a triangle, and can also be an odd-numbered polygon, an asymmetrical polygon, an even-numbered polygon with a leading angle.

The position where the conductive pad122K is disposed on is not limited thereto and can be arranged at any appropriate position of the light-emitting module100to indicate the orientation of the light-emitting module100. In addition, the conductive pads122A˜122K are generally made of metals with high thermal conductivity, such as copper, tin, aluminum, silver, or gold. In this embodiment, when the conductive pad122K is disposed on the second surface122corresponding to the electric component170, because it has the shortest distance from the electric component170, the heat dissipation of the electric component170can be improved.

In this embodiment, the top conductive layer120″ serves as an electrical connection with the aforementioned light-emitting diode chips131,141,151,161,132,142,152,162,133,143,153, and163. The light-emitting diode chips131,141,151,161,132,142,152,162,133,143,153,163are electrically connected to the conductive pads122A˜122J through the conductive channels121A˜121J, and the conductive pads122A˜122J are electrically connect to the external power source of the light-emitting module100. Therefore, the conductive channels121A˜121J penetrating the insulating substrate120′ also connect the top conductive layer120″ to the conductive pads122A˜122J formed on the second surface. In addition, the conductive channels121A˜121J can be formed at the edges or in the inner portions of the insulating substrate120′ as long as the distance between any two neighboring conductive pads122A˜122J meets the relevant safety requirements.

The material of the insulating substrate120′ may be an epoxy resin, a bismaleimide triazine (BT) resin, a polyimide resin, a composite material of the epoxy resin and glass fibers, or a composite material of BT resin and glass fibers. The material of the top conductive layer120″ and the conductive channels121A˜121J may be metals, such as copper, tin, aluminum, silver, palladium, gold, alloys of the foregoing materials, or stacked layers of the foregoing materials. In one embodiment, when the light-emitting module100is used as a pixel of a display apparatus, a light-shielding structure (not shown) may be additionally formed on the first surface121of the circuit substrate120. For example, a black coating layer or an anti-reflection layer, which can avoid the light from being reflected from the top conductive layer120″ and to modify the color difference between different insulating substrates120′. Thus, the contrast of the display apparatus can be improved.

In this embodiment, the number of light-emitting groups is four (2×2), but it is not limited thereto. In another embodiment, the number of light-emitting groups may be m×n to form a light-emitting groups matrix500composed of a plurality of light-emitting groups in a manner of m columns and n rows. In addition, each light-emitting group130or140or150or160includes a red light-emitting diode chip131,141,151, or161which can emit a first light having the dominant wavelength (WO or the peak wavelength (Wp) between 600 nm and 660 nm; a green light-emitting diode chip132,142,152, or162which can emit a second light having the dominant wavelength (Wd) or the peak wavelength (Wp) between 515 nm and 575 nm; and a blue light-emitting diode chip133,143,153, or163which can emit a third light having the dominant wavelength (Wd) or the peak wavelength (Wp) between 430 nm and 490 nm when a power thereon through a power supply is provided. The above wavelength ranges are only examples, and other color lights that can be used in displays can also be accomplished with the embodiments disclosed in the present disclosure.

FIG.1Ddiscloses a cross-sectional view of a light-emitting module100along line A-A′ disclosed inFIG.1B. In the embodiment, each of the blue light-emitting diode chips133,143respectively includes a supporting substrate133aor143a, which can be optionally removed, a semiconductor epitaxial layer133bor143b, a cathode contact electrode133-1or143-1, and an anode contact electrode133-2or143-2. Each of the blue light-emitting diode chips133,143has one side of the semiconductor epitaxial layer133bor143bfacing the corresponding supporting substrate133aor143aand the other side thereof facing the corresponding contact electrodes133-1,133-2or143-1,143-2. The supporting substrate133aor143acan be used to carry or support the corresponding semiconductor epitaxial layer133bor143b. In addition, the sides of the supporting substrates133aor143aaway from the corresponding semiconductor epitaxial layer133bor143b, that is, the top surfaces of the blue light-emitting diode chips133,143, are the light-emitting surfaces of the blue light-emitting diode chips133,143. If there is no supporting substrates133a,143a, the light-emitting surfaces of the blue light-emitting diode chips133,143are the uppermost surfaces of the semiconductor epitaxial layers133b,143bor the surfaces of the passivation layers (not shown) formed thereon.

In this embodiment, the supporting substrate133aor143ais a primary substrate such as sapphire for the semiconductor epitaxial layer133bor143bto be grown on. In another embodiment, the supporting substrate133aor143ais replaced by a translucent secondary substrate (non-growth substrate). The material of the secondary substrate can be alumina ceramic, glass, sapphire, diamond-like carbon, or quartz. The translucent secondary substrate is connected to the semiconductor epitaxial layer133bor143bthrough a translucent bonding layer (not shown).

As shown in the figure, the cathode contact electrodes133-1,143-1and the anode contact electrodes133-2,143-2of the blue light-emitting diode chips133,143are respectively electrically connected to the top conductive layer120″ through a corresponding first electrical connection portions1331and a corresponding second electrical connection portions1333. Each of the first electrical connection portions1331and each of the second electrical connection portions1333are further surrounded by a corresponding first protective portion1332and a corresponding second protective portion1334respectively. The contours of the first electrical connection portion1331and the second electrical connection portion1333may be a smooth surface or a concave and convex surface. In this embodiment, the first electrical connection portion1331and the second electrical connection portion1333have the contour of a neck. In other words, the first electrical connection portion1331has a width between the anode contact electrode133-1or143-1and the top conductive layer120″ which is smaller than the width at the interface of the first electrical connection portion1331and the top conductive layer120″. Similarly, the second electrical connection portion1333has a width between the cathode contact electrode133-2or143-2and the top conductive layer120″ which is smaller than the width at the interface of the second electrical connection portion1333and the top conductive layer120″. In this embodiment, most of the first electrical connection portion1331and the second electrical connection portion1333are composed of conductive materials, and the first electrical connection portion1331and the second electrical connection portion1333may respectively contain more or less impurities, such as air, the material of the protective part1332/1334, residues in the manufacturing process, and/or pollutants. In another embodiment, the first electrical connection portion1331and the second electrical connection portion1333may all be composed of conductive materials. In another embodiment, the first protective portion1332may be located between the first electrical connection portion1331and the second electrical connection portion1333, simultaneously wrapped around the first electrical connection portion1331and the second electrical connection portion1333, and connected to the first surface121of the circuit substrate120.

The first protective portion1332can not only protect the first electrical connection portion1331and the second electrical connection portion1333to avoid the oxidation of the conductive material by the external environment medium, but also prevent the first electrical connection portion1331and the second electrical connection portion1333from being short circuit caused by material softening or melting in a high temperature environment. In addition, the first protective portion1332can increase the bonding strength between the circuit substrate120and the blue light-emitting diode chip133or143. In an embodiment, the first protective portion1332and/or the second protective portion1334are mainly composed of resin, and may also include a small amount of conductive material such as the material of the electrical connection portion1331or1333. The conductive material in the first protective portion1332is present in a discontinuous form. In another embodiment, the first protective portion1332and/or the second protective portion1334are mainly composed of resin, but do not include conductive materials.

The conductive materials contained in the first electrical connection portion1331, the second electrical connection portion1333, the first protective portion1332, and the second protective portion1334may be the same or different, for example, gold, silver, copper, tin, indium, bismuth, or its alloys. In one embodiment, the conductive material is a metal with a low melting point or an alloy with a low liquidus melting point. In one embodiment, the melting point or liquidus melting point of the metal or the alloy is lower than 210° C. In another embodiment, the melting point or liquidus melting point of the metal or the alloy is lower than 170° C. The material of the alloy with a low liquidus melting point may be a tin-indium alloy or a tin-bismuth alloy.

The resins contained in the first electrical connection portion1331, the second electrical connection portion1333, the first protective portion1332, and the second protective portion1334may be the same or different, for example, a thermosetting resin. In one embodiment, the resin is a thermosetting epoxy resin. In one embodiment, the resin has a glass transition temperature (Tg), and Tg is greater than 50° C. In another embodiment, Tg of the resin is greater than 120° C.

In this embodiment, the translucent encapsulating component180covers the light-emitting groups130,140,150,160and the electric component170, and is in direct contact with the top conductive layer120″ and the first surface121. As shown inFIG.1D, the sidewalls of the translucent encapsulating component180and the sidewalls of the circuit substrate120may be coplanar, but in another embodiment, the sidewalls of the translucent encapsulating component180and the sidewalls of the circuit substrate120may be non-coplanar. The translucent encapsulating component180can protect the light-emitting groups matrix500and the electric component170. In addition, the translucent encapsulating component180has a top surface1801that can serve as the main light-emitting surface of the light-emitting module100so the light emitted by the light-emitting groups130˜160can pass through the top surface1801of the translucent encapsulating component180. In an embodiment, the translucent encapsulating component180has a transmittance of greater than 80% for the wavelength bands of 440 nm to 470 nm, 510 nm to 540 nm, and 610 nm to 640 nm. In the embodiment, the refractive index of the translucent encapsulating component180is between 1.30 and 2.0. By changing the refractive index of the translucent encapsulating component180, the light-emitting angle of the light-emitting module100can be adjusted. That is, the smaller the difference in refractive index of the material of the light-emitting surface of the translucent encapsulating component180, such as the top surface1801, and the material of the external environment, such as air, is, the greater the light-emitting angle could be. In another embodiment, the refractive index of the translucent encapsulating component180is between 1.35 and 1.70. In addition, the translucent encapsulating component180can also protect the top conductive layer120″ from being oxidized by the external environment, and/or the light-emitting elements in the light-emitting groups130,140,150,160from falling off during use.

The material of the translucent encapsulating component180can be resin, ceramic, glass, or a combination of the above. In an embodiment, the material of the translucent encapsulating component180is a thermosetting resin, and the thermosetting resin may be epoxy resin or silicone resin. In one embodiment, the translucent encapsulating component180is composed of silicone resin, and the composition of the silicone resin can be adjusted according to the requirements of the required physical properties or optical properties. In one embodiment, the translucent encapsulating component180contains aliphatic silicone resin, such as methyl siloxane compound, so it has greater ductility and can withstand the thermal stress generated by the light-emitting groups130,140,150,160. In another embodiment, the translucent encapsulating component180contains aromatic silicone resin, such as phenyl siloxane compound, and therefore has a relatively large refractive index. In this way, the refractive index difference between the translucent encapsulating component180and the light-emitting groups130,140,150,160can be reduced to improve the light extraction efficiency of the light-emitting groups130,140,150,160. That is to say, when the refractive index difference of the light-emitting groups130,140,150,160and the material adjacent to the light-emitting surface of the light-emitting groups130,140,150,160is smaller, the light-emitting angle is greater, and the light extraction efficiency can be improved even more. In one embodiment, the material of the light-emitting surface of the light-emitting groups130,140,150,160is sapphire, which has a refractive index of about 1.77, and the material of the translucent encapsulating component180is a silicone resin containing aromatics, and its refractive index is greater than 1.50.

In this embodiment, the translucent encapsulating component180is transparent to red light wavelengths of 600 nm to 660 nm, green light wavelengths of 515 nm to 575 nm, and blue light wavelengths of 430 nm to 490 nm. In one embodiment, the translucent encapsulating component180is based on the same transparent material as described above, and is mixed with carbon black particles. When the light-emitting module100serves as a pixel of a display apparatus, the translucent encapsulating component180mixed with carbon black particles can be beneficial to the contrast. However, carbon black particles have light-absorbing properties, and the shorter the wavelength of light, the greater the absorption of carbon black particles. In a preferred embodiment, the translucent encapsulating component180contains carbon black particles greater than or equal to 0.005 wt % and less than 1 wt %. In another embodiment, the translucent encapsulating component180is based on the same transparent material as described above, and inorganic particle fillers are uniformly mixed therein. The inorganic particle fillers are, for example, fused silica particles, silica (SiO2) particles, or metal particles. The inorganic particle fillers may have an average particle diameter of 100 μm or less. According to the different refractive index and reflectance characteristics of the added inorganic particle fillers, the light scattering ability of the translucent encapsulating component180and the light emission characteristics of the light-emitting module100as a whole can be changed. According to the hardness characteristics of the added inorganic particle fillers, the strengths of the translucent encapsulating component180and the light-emitting module100can be increased. In a preferred embodiment, in order to reduce the deterioration of the overall light transmittance of the light-emitting module100due to light scattering, the translucent encapsulating component180contains less than 50 wt % of inorganic particle fillers.

FIG.1Eis a schematic diagram of another light-emitting module200disclosed according to another embodiment. In this embodiment, the arrangement and structure of the circuit substrate120, the light-emitting groups130,140,150,160, the electric component170, and the translucent encapsulating component180are substantially the same as those of the light-emitting module100. The difference is that the light-emitting module200further includes a layer of light-shielding structure190. The light-shielding structure190is located on the first surface121, covers the top conductive layer120″ located between the light-emitting groups130,140,150,160, and covers the conductive channels121A˜121J. The structure of the light-shielding structure190is, for example, a black coating layer or an anti-reflection layer to reduce the light reflection of the top conductive layer120″ and modify the color difference between different insulating substrates120′. Thus, the contrast of the light-emitting module200and the display apparatus incorporating the light-emitting modules200can be improved.

FIG.1Fis a schematic diagram of another light-emitting module300disclosed in another embodiment. In this embodiment, the arrangement and structure of the circuit substrate120, the light-emitting groups130,140,150,160, the electric component170, and the translucent encapsulating component180are substantially the same as those of the light-emitting module200. The difference is that the light-shielding structure190′ included in the light-emitting module300covers the top conductive layer and conductive channels but not the light-emitting groups130,140,150,160and the electric components170. The structure of the light-shielding structure190′ is, for example, a black coating layer or an anti-reflection layer. This design can reduce the light reflection of the top conductive layer120″ and modify the color difference between different insulating substrates120′ so that the contrast of the light-emitting module300and the display apparatus incorporating the light-emitting module300can be raised. The height of top surface of the light-shielding structure190′ in this embodiment is slightly lower than the top surfaces of the light-emitting groups130,140,150,160and the electric component170, but the actual design is not limited thereto. Depending on the different implementations of the electric component170, the material and height of the light-shielding structure190′ also need to be adjusted appropriately, which will be described separately in subsequent embodiments.

FIG.2is a perspective view of the top surface of the circuit substrate of the light-emitting module100. The light-emitting groups130,140,150,160and the electric components170in the light-emitting module100are indicated by dotted lines. As shown in the figure, the top conductive layer120″ has conductive lines121A′˜121J′ respectively electrically connected to the conductive channels121A˜121J, and the ends of each conductive line121A′˜121J′ also have conductive pads121A′1and121A′2,121B′1and121B′2,121C′1and121C′2,121D′1˜121D′6,121E′1,121F′1,121G′1˜121G′6,121H′1and121H′2,121I′1and121I′2, and121J′1and121J′2respectively electrically connected to the aforementioned light-emitting diode chips131,141,151,161,132,142,152,162,133,143,153, and163. The detailed structures are described as follows.

As shown inFIG.2, each of the conductive lines121A′,121B′,121C′,121H′,121I′,121J′ has a pair of enlarged conductive pads121A′1and121A′2,121B′1and121B′2,121C′1and121C′2,121H′1and121H′2,121I′1and121I′2, and121J′1and121J′2at both ends thereof; each of the conductive lines121D′ and121G′ has enlarged comb-shaped conductive pads121D′1˜121D′6and121G′1˜121G′6at both ends thereof; and each of the conductive lines121E′ and121F′ has an enlarged conductive pad121E′1and121F′1at one end thereof. In a preferred embodiment, the width of the conductive pad is wider than the width of the corresponding conductive line so that contact electrodes of the aforementioned light-emitting diode chips and electric components can be independently electrically connected thereto through the aforementioned material of the electrical connection portion.

Referring toFIGS.1B and1Dtogether and taking the cross-sectional view of the line A-A′ as an example, it can be seen from the cross-sectional view that the blue light-emitting diode chip133has a cathode contact electrode133-1and an anode contact electrode133-2, and the blue light-emitting diode chip143has a cathode contact electrode143-1and an anode contact electrode143-2. The cathode contact electrode133-1of the blue light-emitting diode chip133is electrically connected to the conductive pad121D′1of the conductive circuit121D′ through the first electrical connection portion1331; the anode contact electrode133-2of the blue light-emitting diode chip133is electrically connected to the conductive pad121A′1of the conductive circuit121A′ through the second electrical connection portion1333; the cathode contact electrode143-1of the blue light-emitting diode chip143is electrically connected to conductive pad121G′1of the conductive circuit121G′ through the first electrical connection portion1331; the anode contact electrode143-2of the blue light-emitting diode chip143is electrically connected to the conductive pad121A′2of the conductive circuit121A′ through the second electrical connection portion1333. As mentioned above, each of the conductive pads121D′1,121A′1,121G′1,121A′2is electrically connected to each corresponding conductive channel121D,121A,121G,121A, further respectively electrically connected to the conductive pads122D,122A,122G, and122A located at the second surface122through the corresponding conductive channel121D,121A,121G, and121A, and then electrically connected to an external power source.

Similarly, in the light-emitting module100, each of the red light-emitting diode chips131,141,151,161, the green light-emitting diode chips132,142,152,162, and the blue light-emitting diode chips133,143,153,163respectively has a cathode contact electrode and an anode contact electrode (as shown in FIG.1D), and each cathode contact electrode and anode contact electrode are electrically connected to the corresponding conductive pads122A˜122J located at the second surface122.

In the present disclosure, the light-emitting module100further includes an electric component170. The electric component is arranged at the central area of the light-emitting module100and does not overlap with the light-emitting groups matrix500. In one embodiment, the electric component170is a single optical detector, which can be used to detect the luminous intensity of the red LED chips131,141,151,161, the green LED chips132,142,152,162, or the blue light-emitting diode chips133,143,153,163. When the optical detector is arranged at the central area of the light-emitting module100, it is approximately equidistant from the four light-emitting groups130,140,150,160in the light-emitting module100so it can receive the lights emitted from different light-emitting groups in the light-emitting module100and then convert them into electronic signals without deviation. Then, the electronic signals are transmitted to the rear processing unit (not shown), which can be used as a basis for the light output feedback control later, and the feedback control mechanism will be described in detail in the following section regarding the disclosure of the display apparatus.

FIG.3shows a schematic diagram400of an equivalent circuit of the light-emitting module100. InFIG.3, the positions of the electronic symbols representing the light-emitting diode chips correspond to the arrangement of the light-emitting diode chips131˜163in the light-emitting module100. In the light-emitting module100, each of the light-emitting diode chips131,141,151,161,132,142,152,162,133,143,153,163of the light-emitting groups130,140,150,160respectively includes an anode contact electrode (not shown) and a cathode contact electrode (not shown).

From the perspective of the connection relationship of the light-emitting groups matrix500, in the same vertical column, the cathode contact electrodes of all light-emitting diode chips are electrically connected to a same conductive pad. For example, the cathode contact electrodes of the light-emitting diode chips131˜133and161˜163are all electrically connected to the conductive pad122D, and the cathode contact electrodes of the light-emitting diode chips141˜143and151˜153are all electrically connected to the conductive pad122G. In the same horizontal row, the anode contact electrodes of the light-emitting diode chips emitting the same color are electrically connected to a same conductive pad. For example, the anode contact electrodes of the blue light-emitting diode chips133and143are electrically connected to the conductive pad122A, the anode contact electrodes of the green light-emitting diode chips132and142are all electrically connected to the conductive pad122B, and the anode contact electrodes of the red light-emitting diode chips131and141are all electrically connected to the conductive pad122C, the anode contact electrodes of the blue light-emitting diode chips163and153are all electrically connected to the conductive pad122H, the anode contact electrodes of the green light-emitting diode chips162and152are all electrically connected to the conductive pad122I, and the anode contact electrodes of the red light-emitting diode chips161and151are all electrically connected to the conductive pad122J. With this design, when the same anode voltage level is applied to all light-emitting diode chips through the conductive pads122D and122G, different voltage levels or different empower time can be applied to different conductive pads122A˜C and122H˜J, the light-emitting diode chips of different colors in the light-emitting module100are able to be controlled independently for the light-emitting brightness and/or the switching sequence. In addition, the number of conductive pads on the second surface122is also able to be reduced. In another embodiment, the anode contact electrodes of all the light-emitting diode chips can be electrically connected to a common conductive pad with the same voltage level, and then the light-emitting diode chips with different colors can be separately electrically connected to different cathode conductive pads. After applying different voltage levels and/or different empower time to the different cathode conductive pads of the light-emitting diode chips with different colors, it is possible to independently control the lighting brightness and/or the effect of the switching sequence of the light-emitting diode chips with different colors in the light-emitting module100.

In one embodiment, the electric component170represents an integrated photodetector or several independent photodetectors. The electric component170can detect light of several different wavelength bands, for example, the light of red wavelength band between 600˜660 nm, the light of green wavelength band between 515˜575 nm, and the light of blue wavelength band between 430˜490 nm. The two electrodes (not shown) of the electric component170are respectively electrically connected to the conductive pads121F′1and121E′1, electrically connected to the conductive pads122F and122E through the conductive channels121F and121E, and electrically connected to the outside through the conductive pads122F and122E.

When the electric component in the light-emitting module is a single photodetector, an integrated photodetector, or several independent photodetectors, the structure of the light-emitting modules200,300can be designed as those shown inFIGS.1E and1F. The electric component170is a light-receiving element that can receive light by its side surfaces. Therefore, when a light-shielding structure190or190′ is composed of a material transparent to the absorption wavelength of the electric component170, the height of the top surface of the light-shielding structure190or190′ can be slightly lower than the top surfaces of the light-emitting groups130,140,150,160and the electric component170as shown inFIGS.1E and1F. In another embodiment, the light-shielding structure190or190′ has a top surface having the same height as the top surface of anyone of the light-emitting groups130,140,150,160and the electric components170or higher than the top surfaces of the light-emitting groups130,140,150,160and the electric components170. When the light-shielding structure190or190′ has a top surface higher than the top surfaces of the light-emitting groups130,140,150,160and the electric components170, the light-shielding structure190or190′ covers the entire top surfaces of the light-emitting groups130,140,150,160and the electric components170.

In another embodiment, the electric component170is a light-receiving element that can receive light by its top surface. Therefore, when a light-shielding structure190or190′ is composed of a material transparent to the absorption wavelength of the electric component170, the light-shielding structure190or190′ has a top surface having the same height as the top surface of anyone of the light-emitting groups130,140,150,160and the electric components170or higher than the top surfaces of the light-emitting groups130,140,150,160and the electric components170. When the light-shielding structure190or190′ has a top surface higher than the top surfaces of the light-emitting groups130,140,150,160and the electric components170, the light-shielding structure190or190′ covers the entire top surfaces of the light-emitting groups130,140,150,160and the electric components170.

In other words, when the electric component170is a light-receiving element and the light-shielding structure190or190′ is composed of a material transparent to the absorption wavelength of the electric component170, the height of the light-shielding structure190or190′ is not limited by the height of the light-emitting groups130,140,150,160and the electric components170.

In another embodiment, when a light-shielding structure190or190′ is composed of a material opaque to the absorption wavelength of the electric component170, the light-shielding structure190or190′ has a top surface having the same height as or lower than the top surface of the electric component170. However, in order not to block the light collection, it is not suitable to cover the top surface of the electric component170by the light-shielding structures190and190′. In all the aforementioned designs, the thickness of the light-shielding structures190and190′ should allow the light-emitting groups130,140,150,160to transmit light, so as to achieve the functions of the light-emitting module200or300itself.

In an embodiment, the electric component170includes one or more light-emitting chips, which can emit one or more kinds of light with different wavelengths from that of the light-emitting groups matrix500. For example, amber, cool white, warm white, or cyan. The cathode and anode electrodes (not shown) of the electric component170are respectively electrically connected to the conductive pads121F′1and121E′1, electrically connected to the conductive pads122F and122E through the conductive channels121F and121E, and electrically connected to the outside through the conductive pads122F and122E. By adding the electric components170with different light-emitting wavelength bands and/or different color temperatures, the light-emitting module100can have multiple functions. For example, when being operated in a car, the light-emitting groups matrix500in the light-emitting module100can be used as an interactive taillight. If an amber light-emitting chip is included in the electric component170in the light-emitting module100, the electric component170can have the function of a directional light.

When the electric component in the light-emitting module is one or more light-emitting chips, the structure of the light-emitting modules200,300can be designed as those shown inFIGS.1E and1F. The electric component170includes a light-emitting chip. In this embodiment, the height of the top surface of the light-shielding structure190or190′ is slightly lower than the top surfaces of the light-emitting groups130,140,150,160and the electric component170as shown inFIGS.1E and1F. In another embodiment, the top surface of the light-shielding structure190or190′ can be the same height as the top surface of anyone of the light-emitting groups130,140,150,160and the electric components170or higher than the top surfaces of the light-emitting groups130,140,150,160and the electric components170. When the light-shielding structure190or190′ has a top surface higher than the top surfaces of the light-emitting groups130,140,150,160and the electric components170, the light-shielding structures190and190′ cover the entire top surfaces of the light-emitting groups130,140,150,160and the electric components170. In all the aforementioned designs, the thickness of the light-shielding structures190and190′ should allow the light-emitting groups130,140,150,160and the electric component170to transmit light, so as to achieve the functions of the light-emitting module200or300itself.

In an embodiment, the electric component170is a non-optoelectronic component, such as a varistor or an integrated circuit (drive IC) which can drive the light-emitting module. The non-optoelectronic component can receive the external non-light signal to adjust the light emitting effect of the light-emitting module such as the light emission intensity. To be more specific, as a drive IC, it receives external electrical signal; as a varistor, it receives external pressure signal. The cathode and anode electrodes (not shown) of the electric component170are respectively electrically connected to the conductive pads121F′1and121E′1, electrically connected to the conductive pads122F and122E through the conductive channels121F and121E, and electrically connected to the outside through the conductive pads122F and122E.

When the electric component in the light-emitting module is a non-optoelectronic component not emitting/receiving light, the structure of the light-emitting modules200and300can be designed as those shown inFIGS.1E and1F. Since the operation of the electric component170is not affected by light, the height of the light-shielding structure190or190′ is not limited by the height of the light-emitting groups130,140,150,160and the electric components170. In this embodiment, the height of the top surface of the light-shielding structure190or190′ can be slightly lower than the top surfaces of the light-emitting groups130,140,150,160and the electric component170as shown inFIGS.1E and1F. In another embodiment, the top surface of the light-shielding structure190or190′ can be the same height as the top surface of anyone of the light-emitting groups130,140,150,160and the electric components170or higher than the top surfaces of the light-emitting groups130,140,150,160and the electric components170. When the height of the top surface of the light-shielding structure190or190′ is higher than the top surfaces of the light-emitting groups130,140,150,160and the electric components170, the light-shielding structures190and190′ cover the entire top surfaces of the light-emitting groups130,140,150,160and the electric components170. In all the aforementioned designs, the thickness of the light-shielding structures190or190′ should be allow the light-emitting groups130,140,150,160to transmit light, so as to achieve the functions of the light-emitting module200or300itself.

In another embodiment, the light-shielding structure190or190′ covers the full electric component170alone and expose the light-emitting groups130,140,150,160so the function such as heat dissipation or the ability to receive pressure of the electric component170is not affected by the coverage of the light-shielding structure190or190′. The light-shielding structure190or190′ has a uniform height in the light-emitting module so the light-shielding structure190or190′ has a flat uppermost surface in a single light-emitting module, but the disclosure is not limited to this. In another embodiment, the light-shielding structure190or190′ has different heights above and/or around the electric component170and the light-emitting groups130,140,150,160. That is, the light-shielding structure190or190′ has an uneven uppermost surface from the macro perspective. However, regardless of the surface type of the light-shielding structure190or190′, the light emission of the light-emitting groups130,140,150,160should not be blocked.

FIG.4shows a top view of a display apparatus1000composed of the aforementioned light-emitting modules100. The display apparatus1000includes a target carrier1100and a plurality of light-emitting modules100fixed on the target carrier1100in a matrix pattern. In the display apparatus1000, each light-emitting module100includes four light-emitting groups130,140,150, and160that each can emit red, blue, and green light, and each of the light-emitting groups130,140,150, and160can be one pixel in the display apparatus1000. Multiple light-emitting modules100can be arranged and fixed onto the target carrier1100one after another or simultaneously. Along the X axis (horizontal), the distances between any two neighboring red light-emitting diode chips131,141,151,161, any two neighboring green light-emitting diode chips132,142,152,162, and any two neighboring blue light-emitting diode chips133,143,153,163in the corresponding light-emitting groups130,140,150,160in two adjacent light-emitting modules100are all dl, wherein the distance here is measured from the center points of the two same-color light-emitting diode chips along the X-axis direction. Along the Y axis (vertical), similarly, the distances between any two neighboring red light-emitting diode chips131,141.151,161, any two neighboring green light-emitting diode chips132,142,152,162, and any two neighboring blue light-emitting diode chips133,143,153,163in the corresponding light-emitting groups130,140,150,160in two adjacent light-emitting modules100are all also dl, wherein the distance here is measured from the center points of the two same-color light-emitting diode chips along the Y-axis direction. The distance dl is determined according to the size of the target carrier1100and the resolution of the display apparatus1000.

On the X axis, there is a gap g1between two adjacent light-emitting modules100, and on the Y axis, there is a gap g2between two adjacent light-emitting modules100. In one embodiment, the gap g1and the gap g2are between 5 μm and 1000 μm. The larger gap facilitates the subsequent replacement procedure of the failed light-emitting module100. Under normal operation, the viewer of the display apparatus1000usually changes the viewing position along the X-axis (horizontal direction) and rarely changes the viewing position along the Y-axis (vertical direction). Therefore, the viewing angle θ1along the X-axis (horizontal direction) of the display apparatus1000could be large. In other words, the light-emitting angle of the light-emitting groups130,140,150,160on the X-axis (horizontal direction) is large and the light intensity distribution is uniform. In order to ensure that the color difference of the display apparatus1000in the viewing angle θ1along the X-axis is minimized, as shown inFIG.4, the difference in the light-emitting intensity distribution of the light-emitting groups130,140,150,160along the X-axis can be reduced or can be consistent.

In one embodiment, since each light-emitting module100includes 4 light-emitting groups, when fabricating a display apparatus with the same resolution, the number of steps for arranging and fixing the light-emitting modules100on the target carrier1100is ¼ of the number of steps for arranging and fixing the light-emitting groups on the target carrier1100, and therefore the process time can be greatly reduced.

In addition, in one embodiment, the electric component170is a photodetector. As mentioned above, when the photodetector170is arranged in the central area of each light-emitting module100, it is approximately equidistant from the four light-emitting groups130,140,150,160in the light-emitting module100, and the electric component170can easily receive the same light-emitting intensity from the light-emitting groups130,140,150,160. In this embodiment, the display apparatus1000further includes an electronic signal receiving unit (not shown), a comparison unit (not shown), and a feedback controlling unit (not shown). When each electric component170on the display apparatus1000receives the specific color light, it converts the color light into an electronic signal and transmit the signal to the electronic signal receiving unit. After the electronic signal is received by the electronic signal receiving unit, it is compared by the comparison unit to compare whether each light-emitting module100reaches an appropriate brightness range. After comparison, when the light-emitting intensity of some of the light-emitting modules100is not within the appropriate brightness range, the feedback controlling unit can provide corresponding feedback control signals to the light-emitting modules100so that the brightness range of the light-emitting modules100can be adjusted accordingly. In another embodiment, the display apparatus1000may further include an environment sensing unit (not shown). The environment sensing unit can detect the brightness of the surrounding environment of the display apparatus1000, and provide corresponding feedback controlling signals through the feedback controlling unit. For the light-emitting modules100in the display apparatus1000, the light-emitting modules100can therefore correspondingly adjust the brightness to an appropriate brightness range according to the ambient brightness.

FIG.5is a top view of another display apparatus2000disclosed in another embodiment. In this embodiment, the display apparatus2000is composed of two or more types of light-emitting modules100and100′. The electric components170and170′ included in the first light-emitting module100and the second light-emitting module100′ are different. In the first light-emitting module100, the first electric component170is an infrared light-emitting element that can emit a fourth light; in the second light-emitting module100′, the second electric component170′ is an infrared light photodiode that can absorb infrared light. As shown in the figure, the first light-emitting module100and the second light-emitting module100′ are arranged in pairs on the display apparatus1000. By detecting the time needed for receiving the infrared light which is emitted from the first electric component170and then reflected by the external objects and the amount of the received infrared light thereof, the distance between the external objects and the display apparatus2000can be measured. Furthermore, in the entire display apparatus2000, the combination of the first light-emitting modules100and the second light-emitting modules100′ can be used to confirm the movement/gesture in order to detect the relative position thereof, so as to achieve the function of an interactive screen.

Although the present disclosure has been explained above, it is not the limitation of the range, the sequence in practice, the material in practice, or the method in practice. Any modification or decoration for present disclosure is not detached from the spirit and the range of such.