TWI819863B - Display panel - Google Patents

Abstract

A display panel including a pixel array substrate, a first planarization layer, a plurality of first bonding pads, a first light emitting device, a second planarization layer, a plurality of second bonding pads and a second light emitting device is provided. The first planarization layer is disposed on the pixel array substrate. The first bonding pads are disposed on the first planarization layer. The first light emitting device is electrically bonded to the first bonding pads. The second planarization layer covers the first light emitting device. The second bonding pads are disposed on the second planarization layer. The second light emitting device is electrically bonded to the second bonding pads.

Description

display panel

The present invention relates to a display panel, and in particular, to a display panel having a light-emitting element.

In recent years, with the high manufacturing cost of organic light-emitting diode (OLED) display panels and their service life unable to compete with current mainstream displays, Micro LED Displays Gradually attracting the investment attention of major technology companies. In order to achieve lower production costs and larger product design margins, the manufacturing technology of micro-light-emitting element displays uses die transfer. More specifically, the chip manufacturer needs to first make (or place) the micro-light-emitting component chips required by the customer on the temporary storage substrate, and then the customer will store the micro-light-emitting components on the temporary substrate according to different application requirements. The dies are transferred to the driver circuit boards of different products.

However, as the resolution of display screens increases, the size and arrangement pitch of micro-light-emitting elements continue to shrink, which also increases the difficulty of the transfer process of micro-light-emitting element crystals. How to balance the high-resolution display requirements and the yield of die transfer is still a difficult problem to be solved for micro-light-emitting element displays.

The present invention provides a display panel whose light-emitting elements have a high transfer bonding yield.

The display panel of the present invention includes a pixel array substrate, a first flat layer, a plurality of first pads, a first light-emitting element, a second flat layer, a plurality of second pads and a second light-emitting element. The first flat layer is disposed on the pixel array substrate. A plurality of first pads are disposed on the first flat layer. The first light-emitting element is electrically connected to the first pads. The second flat layer covers the first light emitting element. A plurality of second pads are disposed on the second flat layer. The second light-emitting element is electrically connected to the second pads.

Based on the above, in the display panel according to an embodiment of the present invention, a flat layer is provided between a plurality of first pads for bonding the first light-emitting elements and a plurality of second pads for bonding the second light-emitting elements. . The flat layer covers the first pads and the first light-emitting elements, and has the second pads on it. Through the arrangement of this flat layer, the risk of damage to the first light-emitting element bonded first during the bonding process of the second light-emitting element can be avoided, and the bonding yield of the second light-emitting element can be effectively improved. In addition, the transfer yield of light-emitting elements is less likely to be affected by the size and arrangement of the light-emitting elements.

As used herein, "about," "approximately," "substantially," or "substantially" includes the stated value and an average within an acceptable range of deviations from a particular value as determined by one of ordinary skill in the art, taking into account that Discuss the measurement and the specific amount of error associated with the measurement (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±15%, ±10%, ±5%, for example. Furthermore, the terms "approximately", "approximately", "substantially" or "substantially" used in this article can be used to select a more acceptable deviation range or standard deviation based on the measurement properties, cutting properties or other properties, and can Not one standard deviation applies to all properties.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to physical and/or electrical connection. Furthermore, "electrical connection" can be the presence of other components between the two components.

Additionally, relative terms, such as "lower" or "bottom" and "upper" or "top," may be used herein to describe one element's relationship to another element as illustrated in the Figures. It will be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation illustrated in the figures. For example, if the device in one of the figures is turned over, elements described as "lower" than other elements would then be oriented "above" the other elements. Thus, the exemplary term "lower" may include both "lower" and "upper" orientations, depending on the particular orientation of the drawing. Similarly, if the device in one of the figures is turned over, elements described as "below" or "beneath" other elements would then be oriented "above" the other elements. Thus, the exemplary terms "upper" or "lower" may include both upper and lower orientations.

Example embodiments are described herein with reference to cross-sectional illustrations that are schematic illustrations of idealized embodiments. Accordingly, variations in the shapes illustrated in the illustrations are to be expected as a result of, for example, manufacturing techniques and/or tolerances. Thus, embodiments described herein should not be construed as limited to the particular shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, regions shown or described as flat may typically have rough and/or non-linear characteristics. Additionally, the acute angles shown may be rounded. Accordingly, the regions shown in the figures are schematic in nature and their shapes are not intended to illustrate the precise shapes of the regions and are not intended to limit the scope of the claims.

Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numbers are used in the drawings and descriptions to refer to the same or similar parts.

FIG. 1 is a schematic cross-sectional view of a display panel according to a first embodiment of the present invention. FIG. 2 is a schematic top view of the display panel of FIG. 1 . Referring to FIGS. 1 and 2 , the display panel 10 includes a pixel array substrate 100 . For example, the pixel array substrate 100 can be provided with a plurality of pixel areas, and each pixel area is provided with at least two light-emitting elements LED. In this embodiment, each pixel area may be provided with three light-emitting elements LED, such as the first light-emitting element LED1, the second light-emitting element LED2 and the third light-emitting element LED3 in FIG. 1, but is not limited thereto. In another not-shown embodiment, each pixel area may be provided with only a combination of the first light-emitting element LED1 and the second light-emitting element LED2, or a combination of the second light-emitting element LED2 and the third light-emitting element LED3. combination.

In detail, the display panel 10 may further include a first flat layer PL1, a plurality of first pads, a second flat layer PL2, a plurality of second pads, a third flat layer PL3, and a plurality of third pads. The first flat layer PL1 is disposed on the pixel array substrate 100, and a plurality of first pads are provided on the first flat layer PL1. The first light-emitting element LED1 is electrically connected to these first pads. The second flat layer PL2 covers the first light emitting element LED1 and the first pad. A plurality of second pads are disposed on the second planar layer PL2, and the second light emitting element LED2 is electrically connected to these second pads. Similar to the second planar layer PL2, the third planar layer PL3 covers the second light emitting element LED2 and the second pad. A plurality of third pads are disposed on the third planar layer PL3, and the third light emitting element LED3 is electrically connected to these third pads.

More specifically, the first light-emitting element LED1, the second light-emitting element LED2 and the third light-emitting element LED3 of this embodiment are not arranged on the same film layer. The materials of the first planar layer PL1, the second planar layer PL2, and the third planar layer PL3 may include organic insulating materials, inorganic insulating materials, or combinations thereof, wherein the organic insulating materials include polyimide, organic photoresist materials, or combinations thereof , inorganic insulating materials include silicon oxide, silicon nitride, silicon oxynitride or combinations thereof. Preferably, the material of the flat layer can be an organic insulating material or an inorganic insulating material with high transmittance.

In this embodiment, the light-emitting color of the first light-emitting element LED1 and the second light-emitting element LED2 can be selected from blue and green, and the light-emitting color of the third light-emitting element LED3 can be selected from red, but is not limited thereto. In other embodiments, the stacking sequence of light-emitting elements with different emitting colors can be adjusted according to the luminous efficiency of the light-emitting elements. In this embodiment, the light-emitting element LED may include an epitaxial structure layer EPS, a first electrode E1 and a second electrode E2. The first electrode E1 and the second electrode E2 can respectively be electrically connected to two semiconductor layers with different doping characteristics (such as a P-type semiconductor layer and an N-type semiconductor layer not shown) in the epitaxial structure layer EPS, and these two A light-emitting layer (not shown) is sandwiched between the semiconductor layers.

On the other hand, the materials of the first electrode E1 and the second electrode E2 of the light-emitting element LED may include indium, titanium, tin, nickel, gold, or the above stacked layers, and the material of the contact pad may include aluminum, titanium, indium tin oxide material, indium zinc oxide, molybdenum, indium gallium zinc oxide, or the above stacked layers, but is not limited to this. The electrode material and pad material of the light-emitting element can also be made of other suitable conductive materials that can create a common gold bond with each other during the bonding process.

Based on the above stacked structure, it can be seen that during the manufacturing process of the display panel 10, the transfer and bonding process of multiple light-emitting elements with different emitting colors also includes the steps of forming a flat layer and a contact pad. For example, after the transfer and bonding processes of the plurality of first light-emitting elements LED1 in the plurality of pixel areas of the display panel 10 are completed, the steps of forming the second planarization layer PL2 and the plurality of second pads are sequentially performed. Then, a second transfer process is performed to connect the plurality of second light-emitting elements LED2 to the second pads. After completion, the steps of forming the third planarization layer PL3 and a plurality of third pads are performed in sequence. Then, a third transfer process is performed to connect the plurality of third light-emitting elements LED3 to the third pads.

In particular, through the arrangement of the second flat layer PL2, it can effectively prevent the first light-emitting element LED1 in the same pixel area from being damaged or affecting its light-emitting characteristics during the transfer and bonding process of the second light-emitting element LED2, and at the same time Improve the transfer yield of the second light-emitting element LED2. Similarly, through the arrangement of the third flat layer PL3, it can effectively prevent the second light-emitting element LED2 in the same pixel area from being damaged or affect its light-emitting characteristics during the transfer and bonding process of the third light-emitting element LED3, and at the same time improve the third light-emitting element LED2. Transfer yield of light-emitting element LED3.

In this embodiment, each pixel area (as shown in Figure 1) may be provided with a first pad P1a and a first pad P1b for bonding the first light-emitting element LED1, and a first pad P1b for bonding the second light-emitting element LED2. The second pads P2a and P2b and the third pads P3a and P3b used to connect the third light-emitting element LED3. The pixel array substrate 100 may include a first active element T1, a second active element T2 and a third active element T3 provided corresponding to each pixel area. The first active element T1, the second active element T2 and the third active element T3 can be amorphous silicon thin film transistors (Amorphous Silicon TFT, a-Si TFT), low temperature polycrystalline silicon thin film transistors (LTPS TFT), microcrystalline silicon thin film transistors Crystal (micro-Si TFT) or metal oxide transistor (Metal Oxide Transistor).

For example, the first pad P1a can penetrate the first planar layer PL1 to electrically connect the first active element T1, and the second pad P2b can penetrate the first planar layer PL1 and the second planar layer PL2 to electrically connect the second The active element T2 and the third pad P3b can penetrate the first planar layer PL1, the second planar layer PL2 and the third planar layer PL3 to electrically connect the third active element T3.

In this embodiment, the first active element T1 , the second active element T2 and the third active element T3 can respectively serve as control elements for whether the first light-emitting element LED1 , the second light-emitting element LED2 and the third light-emitting element LED3 emit light. However, the present invention is not limited to this. In other embodiments, the pads of the light-emitting element can also be electrically connected to the pixel driving circuit, and the pixel driving circuit can be a combination of circuit blocks composed of multiple capacitors and multiple active components and having different functions.

It is particularly important to note that since the first pad, the second pad and the third pad are respectively disposed on different flat layers, these pads can be alternately arranged along one direction (for example, direction X in FIG. 2 ). For example, in this embodiment, a plurality of first pads and a plurality of second pads in each pixel area may be alternately arranged along the direction The pads can be alternately arranged along the direction X. More specifically, in the viewing direction along the direction Z, the second pad P2b is located between the third pad P3a and the third pad P3b, and the third pad P3a and the first pad P1b are located between the third pad P3a and the first pad P1b. Between the second pad P2a and the second pad P2b, the second pad P2a is located between the first pad P1a and the first pad P1b. Therefore, in this embodiment, the first light-emitting element LED1, the second light-emitting element LED2 and the third light-emitting element LED3 are arranged along the direction X (that is, the first direction).

From another point of view, since the plurality of first pads, the plurality of second pads and the plurality of third pads are alternately arranged, the first light-emitting element LED1, the second light-emitting element LED2 and the like are bonded to these pads. At least two of the third light emitting elements LED3 overlap each other. The overlapping relationship here is, for example, that the two elements overlap each other along a direction perpendicular to the pixel array substrate 100 (eg, direction Z). Unless otherwise mentioned below, the overlapping relationship between the two components will be defined in this way and will not be described again.

For example, in this embodiment, the first light-emitting element LED1 has a first light-emitting surface ES1 covered by the second planar layer PL2, and the first light-emitting surface ES1 overlaps the second pad P2a along the direction Z. Similarly, the second light-emitting element LED2 has a second light-emitting surface ES2 covered by the third planar layer PL3, and the second light-emitting surface ES2 overlaps the third pad P3a along the direction Z. Specifically, the light-emitting surface here is, for example, the surface of the epitaxial structure layer EPS of the light-emitting element LED facing away from the first electrode E1 and the second electrode E2.

In this embodiment, the first light-emitting surface ES1 of the first light-emitting element LED1 has a first portion ES1p1 that overlaps the second light-emitting element LED2 and a second portion ES1p2 that does not overlap the second light-emitting element LED2. The first part ES1p1 of the first light-emitting surface ES1 has a first blocking width BW1 along the direction X, and the second part ES1p2 thereof has a first light-emitting width EW1 along the direction X. It is particularly noted that the first element width DW1 of the first light emitting element LED1 along the direction X is greater than the first light emission width EW1, and the first light emission width EW1 is greater than the first blocking width BW1. Preferably, the first blocking width BW1 is greater than 0 and less than half of the first element width DW1.

Similarly, the second light-emitting surface ES2 of the second light-emitting element LED2 has a first portion ES2p1 that overlaps the third light-emitting element LED3 and a second portion ES2p2 that does not overlap the third light-emitting element LED3. The first part ES2p1 of the second light-emitting surface ES2 has a second blocking width BW2 along the direction X, and the second part ES2p2 thereof has a second light-emitting width EW2 along the direction X. It is particularly noted that the second element width DW2 of the second light emitting element LED2 along the direction X is greater than the second light emission width EW2, and the second light emission width EW2 is greater than the second blocking width BW2. Preferably, the second shielding width BW2 is greater than 0 and less than half of the second element width DW2.

Since the third light emitting element LED3 is located on the uppermost layer of the display panel 10, its third element width DW3 along the direction X is substantially equal to the third light emitting width EW3 along the direction X of its third light emitting surface ES3.

In particular, since the first light-emitting element LED1, the second light-emitting element LED2 and the third light-emitting element LED3 with different light-emitting colors are respectively located on different flat layers, their respective configurations on the XY plane are more flexible. For example, the second light-emitting element LED2 can partially cover the first light-emitting surface ES1 of the first light-emitting element LED1, and the third light-emitting element LED3 can partially cover the second light-emitting surface ES2 of the second light-emitting element LED2. That is to say, part of the first light beam LB1 emitted by the first light-emitting element LED1 will be blocked by the second pad P2a and the second light-emitting element LED2, and part of the second light beam LB2 emitted by the second light-emitting element LED2 will be blocked by the third contact pad P2a. It is blocked by the pad P3a and the third light-emitting element LED3. Since the third light-emitting element LED3 is located on the uppermost layer of the display panel 10, the third light beam LB3 emitted by it can directly exit the display panel 10.

As long as the light extraction efficiency permits, the above-mentioned overlapping relationship can effectively reduce the configuration space required for each pixel area. In other words, it helps to improve the pixel resolution of the display panel 10 . In addition, the layered transfer method of the light-emitting element LED can also prevent the display panel 10 from increasing the difficulty of the transfer process of the light-emitting element LED due to the high resolution requirements.

On the other hand, in order to prevent the part of the first light beam LB1 blocked by the second pad P2a and the part of the second light beam LB2 blocked by the third pad P3a from being (diffusely) reflected to the adjacent pixel area and causing the display resolution to decrease. The pad that overlaps the light-emitting surface of the light-emitting element can also be provided with a light-absorbing layer (not shown) on the side facing the light-emitting surface to absorb these blocked first light beams LB1 and second light beams LB2, but this is not the case. is limited.

Other embodiments will be enumerated below to describe the present invention in detail, in which the same components will be marked with the same symbols, and descriptions of the same technical content will be omitted. Please refer to the previous embodiments for the omitted parts, which will not be described again.

FIG. 3 is a schematic top view of a display panel according to a second embodiment of the present invention. FIG. 4 is a schematic top view of a display panel according to a third embodiment of the present invention. Please refer to FIG. 3 . The only difference between the display panel 10A of this embodiment and the display panel 10 of FIG. 2 is that the overlapping relationship of the light-emitting elements is different. Specifically, in the display panel 10A of this embodiment, the first pads P1a-A and P1b-A are used to connect the first light-emitting element LED1-A, and the first pads P1b-A are used to connect the second light-emitting element LED2-A. The second pads P2a-A and P2b-A of A are arranged side by side along the direction Y, instead of being alternately arranged along the direction X as shown in the display panel 10 of FIG. 2 . That is to say, in this embodiment, the first light-emitting element LED1-A and the second light-emitting element LED2-A are arranged along the direction Y and do not overlap each other.

It is particularly noted that in this embodiment, the extending direction (for example, direction The extension direction of the pad and the third pad (for example, direction Y). From another point of view, the arrangement direction (for example, direction Y) of the third pad P3a-A and the third pad P3b-A is perpendicular to the second pad P2a-A and the second pad P2b-A (or the direction Y). The arrangement direction (for example, direction X) of one pad P1a-A and the first pad P1b-A).

In this embodiment, the third light-emitting element LED3-A can partially overlap the second light-emitting surface ES2-A of the second light-emitting element LED2-A and the first light-emitting surface ES1-A of the first light-emitting element LED1-A. For example, the third light-emitting element LED3-A may be a red light-emitting diode with poor light extraction efficiency. Therefore, through the overlapping arrangement relationship with the second light-emitting element LED2-A and the first light-emitting element LED1-A, in addition to the first light-emitting element LED1-A, the second light-emitting element LED2-A and the third light-emitting element LED3-A, the first light-emitting element LED1-A, the second light-emitting element LED2-A and the third light-emitting element LED3-A can be realized. In addition to the close arrangement of A, the light-emitting area of the third light-emitting surface ES3-A of the third light-emitting element LED3-A can be further increased, so as to reduce the distance between the third light-emitting element LED3-A and other light-emitting elements of other color (such as the first light-emitting element). The difference in light extraction efficiency between the element LED1-A and the second light-emitting element LED2-A).

However, the present invention is not limited to this. Referring to FIG. 4 , in another modified embodiment, the first light-emitting surface ES1-B of the first light-emitting element LED1-B and the second light-emitting surface ES2-B of the second light-emitting element LED2-B of the display panel 10B can be relatively small. The first light-emitting surface ES1-A of the first light-emitting element LED1-A and the second light-emitting surface ES2-A of the second light-emitting element LED2-A of FIG. 3 are smaller. Therefore, the third light-emitting surface ES3-B of the third light-emitting element LED3-B can be retracted in the arrangement direction (for example, direction Y) of the first light-emitting element LED1-B and the second light-emitting element LED2-B, and reveal the figure. 3. The part of the first light-emitting surface ES1-A and the second light-emitting surface ES2-A that was originally blocked by the third light-emitting element LED3-A is used to adjust the first light-emitting element LED1-B, the second light-emitting element LED2-B and the third light-emitting element LED3-A. The light output ratio relationship between the three light-emitting elements LED3-B.

In other words, since these light-emitting elements with different light-emitting colors are bonded to different flat layers, the light emission ratio between these light-emitting elements can be adjusted by adjusting the overlapping relationship and overlapping ratio of these light-emitting elements. Accordingly, the flexibility in selecting light-emitting elements with different light-emitting colors can be increased.

FIG. 5 is a schematic cross-sectional view of a display panel according to a fourth embodiment of the present invention. Please refer to FIG. 5. The only difference between the display panel 10C of this embodiment and the display panel 10 of FIG. on the third flat layer PL3. The light-shielding pattern layer 150 has a plurality of openings OP, and these openings OP respectively overlap with the second part ES1p2 of the first light-emitting surface ES1 of the first light-emitting element LED1 and the second part ES2p2 of the second light-emitting surface ES2 of the second light-emitting element LED2. and the third light-emitting surface ES3 of the third light-emitting element LED3. The material of the light-shielding pattern layer 150 may include black resin material or opaque photoresist material.

The light-shielding pattern layer 150 is used to block the first light beam LB1 emitted from the first part ES1p1 of the first light-emitting surface ES1 of the first light-emitting element LED1 and the second light beam emitted from the first part ES2p1 of the second light-emitting surface ES2 of the second light-emitting element LED2 LB2 can prevent these light beams from being (diffusely) reflected to adjacent pixel areas and causing a decrease in display resolution.

To sum up, in the display panel according to an embodiment of the present invention, a plurality of first pads for bonding the first light-emitting elements and a plurality of second pads for bonding the second light-emitting elements are provided. Flat layer. The flat layer covers the first pads and the first light-emitting elements, and has the second pads on it. Through the arrangement of this flat layer, the risk of damage to the first light-emitting element bonded first during the bonding process of the second light-emitting element can be avoided, and the bonding yield of the second light-emitting element can be effectively improved. In addition, the transfer yield of light-emitting elements is less likely to be affected by the size and arrangement of the light-emitting elements.

10, 10A, 10B, 10C: display panel 100: Pixel array substrate 150:Light-shielding pattern layer BW1: first occlusion width BW2: Second occlusion width DW1: first component width DW2: Second component width DW3: Width of third component EW1: First light width EW2: Second light width EW3: The third light width E1: first electrode E2: second electrode EPS: epitaxial structural layer ES1, ES1-A, ES1-B: the first light-emitting surface ES1p1, ES2p1: Part 1 ES1p2, ES2p2: Part 2 ES2, ES2-A, ES2-B: Second light-emitting surface ES3, ES3-A, ES3-B: The third light-emitting surface LB1: first beam LB2: Second beam LB3: The third beam LED, LED1, LED2, LED3, LED1-A, LED2-A, LED3-A, LED1-B, LED2-B, LED3-B: light-emitting components OP: Open your mouth P1a, P1b, P1a-A, P1b-A: first pad P2a, P2b, P2a-A, P2b-A: second pad P3a, P3b, P3a-A, P3b-A: third pad PL1, PL2, PL3: flat layer T1, T2, T3: active components X, Y, Z: direction

FIG. 1 is a schematic cross-sectional view of a display panel according to a first embodiment of the present invention. FIG. 2 is a schematic top view of the display panel of FIG. 1 . FIG. 3 is a schematic top view of a display panel according to a second embodiment of the present invention. FIG. 4 is a schematic top view of a display panel according to a third embodiment of the present invention. FIG. 5 is a schematic cross-sectional view of a display panel according to a fourth embodiment of the present invention.

10:Display panel

100: Pixel array substrate

E1: first electrode

E2: second electrode

EPS: epitaxial structural layer

ES1: The first shining surface

ES1p1, ES2p1: Part 1

ES1p2, ES2p2: Part 2

ES2: The second light-emitting surface

ES3: The third shining surface

LB1: first beam

LB2: Second beam

LB3: The third beam

LED, LED1, LED2, LED3: light-emitting components

P1a, P1b: first pad

P2a, P2b: second pad

P3a, P3b: third pad

PL1, PL2, PL3: flat layer

T1, T2, T3: active components

X, Y, Z: direction

Claims (12)

A display panel includes: a pixel array substrate including a first active element and a second active element; a first flat layer disposed on the pixel array substrate; a plurality of first pads disposed on the On the first flat layer; a first light-emitting element electrically connected to the first pads; a second flat layer covering the first light-emitting element; a plurality of second pads disposed on the second flat layer on; and a second light-emitting element electrically connected to the second pads, wherein one of the first pads penetrates the first planar layer to electrically connect the first active element, and the second One of the pads penetrates the first planar layer and the second planar layer to electrically connect the second active element. The display panel of claim 1, wherein the first light-emitting element has a first light-emitting surface, and the first light-emitting surface of the first light-emitting element overlaps one of the second pads. The display panel of claim 2, wherein the first light-emitting element and the second light-emitting element are arranged along a first direction, and the first light-emitting surface of the first light-emitting element has a surface that overlaps the second light-emitting element. a first part, the first light-emitting element has a first element width along the first direction, the first part of the first light-emitting surface has a first blocking width along the first direction, the first blocking width is greater than 0 and less than half the width of the first element. The display panel of claim 2, wherein the first light-emitting element and the second light-emitting element are arranged along a first direction, and the first light-emitting surface of the first light-emitting element has a surface that overlaps the second light-emitting element. a first part and a second part not overlapping the second light-emitting element, the first light-emitting element has a first element width along the first direction, the first part and the second part of the first light-emitting surface There is a first blocking width and a first light exiting width respectively along the first direction, the first element width is greater than the first light exiting width, and the first light exiting width is greater than the first blocking width. The display panel of claim 2, further comprising: a third flat layer covering the second light-emitting element; a plurality of third pads disposed on the third flat layer; and a third light-emitting element electrically Sexually coupled to the third pads. The display panel of claim 5, wherein the second light-emitting element has a second light-emitting surface, and the second light-emitting surface of the second light-emitting element overlaps one of the third pads. The display panel of claim 6, wherein the second light-emitting element and the third light-emitting element are arranged along a first direction, and the second light-emitting surface of the second light-emitting element has a surface that overlaps the third light-emitting element. a first part, the second light-emitting element has a second element width along the first direction, the first part of the second light-emitting surface has a second blocking width along the first direction, and the second blocking width is greater than 0 and less than half the width of the second element. The display panel of claim 6, wherein the second light-emitting element and the third light-emitting element are arranged along a first direction, and the second light-emitting surface of the second light-emitting element has a surface that overlaps the third light-emitting element. a first part and a second part not overlapping the third light-emitting element, the second light-emitting element has a second element width along the first direction, the first part and the second part of the second light-emitting surface There is a second blocking width and a second light exiting width respectively along the first direction, the second element width is greater than the second light exiting width, and the second light exiting width is greater than the second blocking width. The display panel of claim 6, wherein the third light-emitting element emits red light, and the first light-emitting element and the second light-emitting element emits light colors of blue and green. The display panel of claim 2, wherein the first pads and the second pads are alternately arranged, and the extending directions of the first pads and the second pads are parallel to each other. The display panel of claim 1, further comprising: a third flat layer covering the second light-emitting element; a plurality of third pads disposed on the third flat layer; and a third light-emitting element electrically The third light-emitting element overlaps the first light-emitting element and the second light-emitting element. The display panel of claim 11, wherein the extending direction of the third pads is perpendicular to the extending directions of the first pads and the second pads.

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