TWI715323B - Display apparatus - Google Patents

Abstract

A display apparatus including a substrate, a plurality of first pixel units and a plurality of second pixel units is provided. The substrate has a central display region and a peripheral display region. The peripheral display region is positioned between the central display region and an edge of the substrate. The first pixel unit is disposed in the central display region and has a plurality of first bonding pads and a first light emitting diode device. The first bonding pads are arranged along a first direction and extend in a second direction. The first bonding pad has a first length along the second direction. The first light emitting diode device is electrically bonded to the first bonding pads. The second pixel unit is disposed in the peripheral display region and has a plurality of second bonding pads and a second light emitting diode device. The second bonding pads are arranged along the first direction and extend in the second direction. The second bonding pad has a second length along the second direction. The second light emitting diode device is electrically bonded to the second bonding pads. The first length of the first bonding pad is not equal to the second length of the second bonding pad.

Description

Display device

The present invention relates to an electronic device, and more particularly to a display device.

The light emitting diode display panel includes an active device substrate and a plurality of light emitting diode devices transferred on the active device substrate. Inheriting the characteristics of light-emitting diodes, light-emitting diode display panels have the advantages of power saving, high efficiency, high brightness, and fast response time. In addition, compared with organic light-emitting diode display panels, light-emitting diode display panels also have advantages such as easy color adjustment, long light-emitting life, and no image burn-in. Therefore, LED display panels are regarded as the next generation of display technology. However, since a circuit with no display function is provided around the LED display panel, it is not easy to realize a LED display panel with a narrow frame or even without a frame.

The invention provides a display device with a narrow frame or no frame.

The display device of the present invention includes a substrate, a plurality of first pixel units and a plurality of second pixel units. The substrate has a central display area and an edge display area. Edge display The display area is located between the edge of the substrate and the central display area. These first pixel units are arranged in the central display area. The first pixel unit includes a plurality of first pads and first light emitting diode elements. The first pads are arranged along the first direction and extend in the second direction. The first pad has a first length in the second direction. The first light emitting diode element is electrically connected to the first pads. These second pixel units are arranged in the edge display area. The second pixel unit includes a plurality of second pads and second light emitting diode elements. The second pads are arranged along the first direction and extend in the second direction. The second pad has a second length in the second direction. The second light emitting diode device is electrically connected to the second pads. The first length of the first pad is not equal to the second length of the second pad.

In an embodiment of the present invention, the length of the first light emitting diode element of the first pixel unit of the above-mentioned display device in the first direction is equal to that of the second light emitting diode element of the second pixel unit in the first direction. Length in one direction.

In an embodiment of the present invention, the second length of the second pad of the aforementioned display device is smaller than the first length of the first pad.

In an embodiment of the present invention, the second pixel unit of the above-mentioned display device further includes a plurality of third pads and third light emitting diode elements. The third pads are arranged along the first direction and extend in the second direction. The third light emitting diode element is electrically connected to the third pads. The third pad has a third length in the second direction, and the third length is not equal to the second length.

In an embodiment of the present invention, the third length of the third pad of the aforementioned display device is smaller than the second length of the second pad.

In an embodiment of the present invention, the second light-emitting two of the above-mentioned display device The light-emitting color of the pole element and the third light-emitting diode element are different.

In an embodiment of the present invention, the plurality of first light emitting diode elements of the plurality of first pixel units of the above-mentioned display device are arranged along the first direction at equal intervals. The plurality of second light emitting diode elements of the plurality of second pixel units are arranged along the first direction at equal intervals. These first light-emitting diode elements and these second light-emitting diode elements have the same emission color.

In an embodiment of the present invention, the plurality of first pads of the first pixel unit of the above-mentioned display device form a first pad group, and the plurality of first pad groups of the plurality of first pixel units are Arrange in the first direction in the first period. The plurality of second pads of the second pixel unit form a second pad group, and the plurality of second pad groups of the second pixel unit are arranged along the first direction in a second period. The light-emitting color of the first light-emitting diode element and the second light-emitting diode element are the same, and the first period is equal to the second period.

In an embodiment of the present invention, the ratio of the first length of the first pad to the second length of the second pad of the aforementioned display device is 3:2.

In an embodiment of the present invention, the above-mentioned display device further includes a plurality of third pixel units disposed in the edge display area. The third pixel unit includes a plurality of third pads and third light emitting diode elements. The third pads are arranged along the first direction and extend in the second direction. The third pad has a third length in the second direction. The third light emitting diode element is electrically connected to the third pads. The third pixel units are farther away from the first pixel units than the second pixel units. The third length of the third pad is smaller than the second length of the second pad, and the second length of the second pad is smaller than the first length of the first pad.

In an embodiment of the present invention, the ratio of the first length of the first pad, the second length of the second pad, and the third length of the third pad of the above-mentioned display device is 3:2:1.

In an embodiment of the present invention, the above-mentioned display device further includes a corner pixel unit disposed at the corner of the edge display area. The corner pixel unit includes a plurality of third pads and third light emitting diode elements. The third pads are arranged along the first direction and extend in the second direction. The third pad has a third length in the second direction. The third light emitting diode element is electrically connected to the third pads. The ratio of the first length of the first pad, the second length of the second pad, and the third length of the third pad is 3:2:1.

Based on the above, in the display device of an embodiment of the present invention, the first pixel unit located in the central display area and the second pixel unit located in the edge display area have pads of different lengths, so that the two pixel units are used The layout space is different for the circuit configuration. Accordingly, the design margin of the overall circuit of the display device can be increased, and it is helpful to realize a narrow frame or even a frameless design of the display device.

10, 11, 12, 20, 21, 22, 23, 23R: display device

100: substrate

100a, 100e: edge

100S: Motherboard

BP0, BP0A, BP1, BP2, BP2a, BP2b, BP3, BP3A: pad

BPG1, BPG2: pad set

C: corner

CDR: Central display area

d, d’: offset

D1, D2: direction

EC0, EC0A, EC1, EC2, EC2A, EC3, EC3A: drive circuit

LED1, LED1r, LED1x, LED2, LED3: light-emitting diode components

L0, L0’, L1, L2, L3, L3’, L4: length

PDR: Edge display area

PU0, PU0A, PU0B: corner pixel unit

PU1, PU1B, PU1r: the first pixel unit

PU2, PU2A, PU2B: second pixel unit

PU3, PU3A, PU3B, PU3Br: the third pixel unit

P1, P2, P3, P4: period

SBR: Side pad area

w: width

I, II: area

FIG. 1 is a schematic top view of a display device according to a first embodiment of the invention.

FIG. 2 is an enlarged schematic diagram of a partial area of the display device of FIG. 1.

3 is a schematic top view of a display device according to a second embodiment of the invention.

FIG. 4 is a schematic top view of a display device according to a third embodiment of the invention.

FIG. 5 is a schematic top view of a display device according to a fourth embodiment of the invention.

FIG. 6 is an enlarged schematic diagram of a partial area of the display device of FIG. 5.

FIG. 7 is a schematic top view of the display device of FIG. 6 after repair.

FIG. 8 is a schematic top view of a display device according to a fifth embodiment of the present invention.

FIG. 9 is a schematic top view of a display device according to a sixth embodiment of the invention.

FIG. 10 is a schematic top view of a display device according to a seventh embodiment of the invention.

FIG. 11 is a schematic top view of the display device of FIG. 10 after repair.

As used herein, "approximately", "approximately", "essentially", or "substantially" includes the stated value and the average value within the acceptable deviation range of the specific value determined by a person of ordinary skill in the art, taking into account all The measurement in question and the specific number of errors associated with the measurement (ie, the limitations of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or, for example, within ±30%, ±20%, ±15%, ±10%, ±5%. Furthermore, "about", "approximately", "essentially", or "substantially" used in this article can be based on measurement properties, cutting properties, or other properties to select a more acceptable deviation range or standard deviation. Not one standard deviation applies to all properties.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. It should 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. Conversely, when a component is said to be "directly on" or "directly connected to" another component, There are no intermediate components. As used herein, "connection" can refer to physical and/or electrical connection. Furthermore, "electrical connection" can mean that there are other components between the two components.

In addition, relative terms such as "lower" or "bottom" and "upper" or "top" can be used herein to describe the relationship between one element and another element, as shown in the figure. It should be understood that relative terms are intended to include different orientations of the device other than those shown in the figures. For example, if the device in one figure is turned over, elements described as being on the "lower" side of other elements will be oriented on the "upper" side of the other elements. Therefore, the exemplary term "lower" may include an orientation of "lower" and "upper", depending on the specific orientation of the drawing. Similarly, if the device in one figure is turned over, elements described as "below" or "below" other elements will be oriented "above" the other elements. Thus, the exemplary terms "above" or "below" can include an orientation of above and below.

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

FIG. 1 is a schematic top view of a display device according to a first embodiment of the invention. FIG. 2 is an enlarged schematic diagram of a partial area I of the display device in FIG. 1. For clarity of presentation, FIG. 1 omits the illustration of the pads, light-emitting diode elements, driving circuits, and side pad regions SBR in FIG. 2. Specifically, Figures 1 and 2 show the substrate 100 that has not been cut from the motherboard 100S, and the substrate 100 cut from the motherboard 100S has an edge 100a that is roughly located on the dotted line indicated by the reference number 100a in the figure. Place.

1 and 2, the display device 10 includes a substrate 100 and a plurality of pictures 素unit. The substrate 100 has a central display area CDR and an edge display area PDR, and the edge display area PDR is located between the edge 100a of the substrate 100 (or the edge 100e of the mother board 100S) and the central display area CDR. The plurality of pixel units include a first pixel unit PU1, a second pixel unit PU2, and a corner pixel unit PU0. The first pixel unit PU1 is disposed in the central display area CDR of the substrate 100. The second pixel unit PU2 is disposed in the edge display area PDR of the substrate 100. The corner pixel unit PU0 is arranged at the corner C of the edge display area PDR. In this embodiment, the material of the substrate 100 can be glass, quartz, organic polymer, or opaque/reflective material (for example, wafer, ceramic, or other applicable materials), or other applicable materials. material.

Furthermore, the pixel unit includes a plurality of pads and light-emitting diode elements, and the light-emitting diode elements are electrically connected to these pads. In this embodiment, the number of pads of each pixel unit and the number of light-emitting diode elements are exemplified by six (ie three groups) and three respectively, which does not mean that the present invention is The content of the schema disclosure is limited. In other embodiments, the number of pads and the number of light-emitting diode elements of each pixel unit can also be adjusted to one, two, or more than four according to actual design requirements. For example, the three light-emitting diode elements of the pixel unit are light-emitting diode element LED1, light-emitting diode element LED2, and light-emitting diode element LED3, and the light-emitting colors of these light-emitting diode elements can be selected separately From red, green and blue to meet the needs of color mixing, but not limited to this.

It is worth noting that the length of the light emitting diode element of the first pixel unit PU1 in the direction D1 is equal to the length of the light emitting diode element of the second pixel unit PU2 in the direction D1. Similarly, the light-emitting diode element of the first pixel unit PU1 The length in the direction D2 is equal to the length of the light emitting diode element of the second pixel unit PU2 in the direction D2. In other words, the sizes of the light emitting diode elements of the first pixel unit PU1 and the second pixel unit PU2 are the same.

On the other hand, the multiple pads BP1 of the first pixel unit PU1 are arranged in the direction D1 and extend in the direction D2, and the pads BP1 have a length L1 in the direction D2. The pads BP2 of the second pixel unit PU2 are arranged in the direction D1 and extend in the direction D2, and the pads BP2 have a length L2 in the direction D2. It should be noted that the length L1 of the pad BP1 of the first pixel unit PU1 is not equal to the length L2 of the pad BP2 of the second pixel unit PU2. More specifically, in this embodiment, the length L1 of the pad BP1 of the first pixel unit PU1 can be selectively greater than the length L2 of the pad BP2 of the second pixel unit PU2. Accordingly, the circuit layout space of the PDR in the edge display area can be increased, which helps to realize a narrow frame or even a frameless design of the display device 10.

In this embodiment, the ratio of the length L1 of the pad BP1 of the first pixel unit PU1 to the length L2 of the pad BP2 of the second pixel unit PU2 is 3:2, but it is not limited thereto. On the other hand, the pad BP0 of the corner pixel unit PU0 has a length L0 in the direction D2, and the length L0 of the pad BP0 can be selectively equal to the length L2 of the pad BP2 of the second pixel unit PU2, but the present invention Not limited to this. In particular, pads of different lengths can provide different repair times for light-emitting diode devices. For example, in this embodiment, the pad BP1 of the first pixel unit PU1 is suitable for providing two repairs, and the pad BP2 of the second pixel unit PU2 and the pad BP0 of the corner pixel unit PU0 are suitable for One-time repair is provided, but the present invention is not limited to this. According to other embodiments, the number of pixel unit repairs (or pad length Degree) can also be adjusted according to actual product requirements (such as process yield, circuit design).

In this embodiment, the six pads of the pixel unit can form three pad groups, and three light-emitting diode elements are electrically connected to the three pad groups, respectively. In particular, the plurality of pad groups BPG1 electrically connected to the plurality of light emitting diode elements LED1 among the plurality of first pixel units PU1 arranged in the direction D1 are arranged along the direction D1 in the first period P1 , The plurality of pad groups BPG2 electrically connected to the plurality of light emitting diode elements LED1 among the plurality of second pixel units PU2 arranged in the direction D1 are arranged along the direction D1 in the second period P2, and the first period P1 is equal to the second period P2.

Similarly, in the plurality of first pixel units PU1 arranged in the direction D2, the plurality of pad groups BPG1 electrically connected to the plurality of light emitting diode elements LED1 are arranged along the direction D2 in the third period P3, and in the direction Among the plurality of second pixel units PU2 arranged on D2, the plurality of pad groups BPG2 electrically connected to the plurality of light emitting diode elements LED1 are arranged in the fourth period P4 along the direction D2, and the third period P3 is equal to the first Four cycles P4. From another point of view, a plurality of light-emitting diode elements for emitting light beams of the same color are arranged along the direction D1 or the direction D2 at equal intervals.

Furthermore, the pixel unit further includes a driving circuit. For example, the first pixel unit PU1 has a driving circuit EC1, the second pixel unit PU2 has a driving circuit EC2, and the corner pixel unit PU0 has a driving circuit EC0, and these driving circuits can be electrically connected to corresponding pads, respectively. , In order to provide the current (or voltage) required when the light-emitting diode element is enabled. The driving circuit includes a pixel driving circuit for driving the pixel unit. In order to realize the narrow frame (or no frame) design of the display device 10, the first The driving circuit EC2 of the two-pixel unit PU2 and the driving circuit EC0 of the corner pixel unit PU0 may also include non-pixel driving circuits, respectively. For example, the non-pixel drive circuit is, for example, a multiplexer (MUX), an integrated gate driver-on-array (GOA), an electrostatic protection (ESD) circuit, a test (TEST) circuit or Its combination.

From another point of view, the pad size of the pixel unit (such as the second pixel unit PU2 and the corner pixel unit PU0) located in the edge display area PDR is smaller than the pad size of the pixel unit located in the central display area CDR , Additional circuit layout space can be added in the display area (such as the edge display area PDR) to configure the non-pixel drive circuit. Accordingly, it is helpful to realize the narrow frame (or frameless) design of the display device 10.

On the other hand, the increased circuit layout space in the display area can also be used to configure the side pad area SBR, and the side pad area SBR can be provided with side pads (not shown). The side pads can be electrically connected to wires (not shown) located on the sidewalls of the substrate 100, and signal lines (such as data lines, scan lines, power lines, common lines, Or other circuit traces) can be electrically connected to the fan-out traces (not shown) and/or the chip (not shown) on the other side surface of the substrate 100 through the side pads and the wires located on the side wall of the substrate 100 .

Other embodiments will be listed below to describe the disclosure in detail, wherein the same components will be marked with the same symbols, and the description of the same technical content will be omitted. For the omitted parts, please refer to the foregoing embodiments, and will not be repeated hereafter.

3 is a schematic top view of a display device according to a second embodiment of the invention. Please refer to FIG. 3, the difference between the display device 11 of this embodiment and the display device 10 of FIG. 2 is that the pad lengths of the corner pixel units are different. Specifically, the length L0' of the pad BP0A of the corner pixel unit PU0 can be selectively smaller than the length L2 of the pad BP2 of the second pixel unit PU2. In this embodiment, the ratio of the length L1 of the pad BP1 of the first pixel unit PU1, the length L2 of the pad BP2 of the second pixel unit PU2 and the length L0' of the pad BP0A of the corner pixel unit PU0 is 3:2:1, but the present invention is not limited to this. Accordingly, the circuit layout space in the display area (especially the corner C of the edge display area PDR) can be further increased, which is helpful for realizing the narrow frame (or frameless) design of the display device 11.

FIG. 4 is a schematic top view of a display device according to a third embodiment of the invention. Referring to FIG. 4, the difference between the display device 12 of this embodiment and the display device 11 of FIG. 3 is that the pad size of the second pixel unit PU2 is different. In this embodiment, the second pixel unit PU2 may include a pad BP2a and a pad BP2b. The pad BP2a and the pad BP2b have a length L2 and a length L4 in the direction D2, respectively, and the length L4 of the pad BP2b can be selectively smaller than the length L2 of the pad BP2a, but the invention is not limited thereto. In other embodiments, the length L4 of the pad BP2b may also be greater than the length L2 of the pad BP2a.

In particular, the light-emitting diode element LED2 and the light-emitting diode element LED3 electrically connected to the pads BP2a and BP2b of the second pixel unit PU2 can emit light in different colors, such as green and blue. More specifically, the length of the two pads used to electrically connect two light-emitting diode elements (such as light-emitting diode element LED2 and light-emitting diode element LED3) in the same pixel unit can also be It is adjusted according to the yield or service life of the light-emitting diode element. On the other hand, through such a configuration relationship, the circuit layout space in the edge display area PDR can be further increased, which helps to realize the narrow frame (or frameless) design of the display device 12.

FIG. 5 is a schematic top view of a display device according to a fourth embodiment of the invention. FIG. 6 is an enlarged schematic diagram of a partial area II of the display device of FIG. 5. FIG. 7 is a schematic top view of the display device of FIG. 6 after repair. For clarity of presentation, FIG. 5 omits the illustration of the pads, light-emitting diode elements, driving circuits, and side pad regions SBR of FIG. 6. In particular, Figures 5 and 6 show the substrate 100 that has not been cut from the motherboard 100S, and the substrate 100 cut from the motherboard 100S, the edge 100a of which is roughly located on the dotted line indicated by the numeral 100a in the figure Place.

Referring to FIGS. 5 and 6, the main difference between the display device 20 of this embodiment and the display device 10 of FIGS. 1 and 2 is that the number of pixel units located in the edge display area PDR is different. Specifically, the display device 20 further includes a plurality of third pixel units PU3 arranged in the edge display area PDR. The third pixel units PU3 are farther away from the first pixel units PU1 than the second pixel units PU2. That is, the second pixel units PU2 are located between the third pixel units PU3 and the central display area CDR. In this embodiment, the corner pixel unit PU0 and part of the third pixel unit PU3 are arranged in a row in the direction D1, and another part of the third pixel unit PU3 is arranged in a row in the direction D2.

It is worth noting that the pad BP3 of the third pixel unit PU3 has a length L3 in the direction D2, and this length L3 can optionally be equal to the length L2 of the pad BP2 of the second pixel unit PU2, but the present invention does not This is limited. For example, in reality In the embodiment, the length L1 of the pad BP1 of the first pixel unit PU1, the length L2 of the pad BP2 of the second pixel unit PU2, the length L3 of the pad BP3 of the third pixel unit PU3, and the corner pixel unit The ratio of the length L0 of the pad BP0 of PU0 is 3:2:2:2, but the present invention is not limited to this. Accordingly, the circuit layout space in the edge display area PDR can be further increased, which is helpful to realize the narrow frame (or frameless) design of the display device 20.

For example, the third pixel unit PU3 further has a driving circuit EC3, and the driving circuit EC3 can be electrically connected to the corresponding pad to provide the current (or voltage) required when the light emitting diode element is activated. The driving circuit EC3 includes a pixel driving circuit for driving the pixel unit. In order to realize the narrow frame (or frameless) design of the display device 10, the driving circuit EC2 of the second pixel unit PU2, the driving circuit EC3 of the third pixel unit PU3, and the driving circuit EC0 of the corner pixel unit PU0 may each further include Non-pixel drive circuit. For example, the non-pixel drive circuit is, for example, a multiplexer (MUX), an integrated gate driver-on-array (GOA), an electrostatic protection (ESD) circuit, a test (TEST) circuit or Its combination.

From another point of view, the size of the pads through the pixel units located in the edge display area PDR (such as the second pixel unit PU2, the third pixel unit PU3 and the corner pixel unit PU0) is smaller than that of the central display area CDR. The pad size of the pixel unit can add extra circuit layout space in the edge display area PDR to configure the non-pixel driving circuit. Accordingly, it is helpful to realize the narrow frame (or no frame) design of the display device 20.

Furthermore, when several pixel units of the display device 20 are detected Often, for example, during the lighting test, the first pixel unit PU1 is judged to be abnormal because the light emitting diode element LED1 cannot be enabled (that is, cannot emit light), and a repair step can be performed. Referring to FIG. 7, the repairing step may include removing the abnormal light-emitting diode element LED1x and transferring and bonding the repairing light-emitting diode element LED1r to the original abnormal light-emitting diode element LED1x. On the pad (for example, pad BP1). In the repaired display device 20R, the light emitting diode element LED1r of the first pixel unit PU1r and the light emitting diode element LED2 (or the light emitting diode element LED3) have an offset d in the direction D2, The light emitting diode element has a width w in the direction D2, and the ratio of the offset d to the width w can be in the range of 1 to 2, but is not limited to this.

FIG. 8 is a schematic top view of a display device according to a fifth embodiment of the present invention. Please refer to FIG. 8, the difference between the display device 21 of this embodiment and the display device 20 of FIG. 6 is that the pad lengths of the third pixel unit and the corner pixel unit are different. Specifically, the length L3' of the pad BP3A of the third pixel unit PU3A and the length L0' of the pad BP0A of the corner pixel unit PU0A may be selectively smaller than the length L2 of the pad BP2 of the second pixel unit PU2 . In this embodiment, the length L1 of the pad BP1 of the first pixel unit PU1, the length L2 of the pad BP2 of the second pixel unit PU2, the length L3' of the pad BP3A of the third pixel unit PU3A, and the corners The ratio of the length L0' of the pad BP0A of the pixel unit PU0A is 3:2:1:1, but the present invention is not limited to this.

It is worth noting that through the above configuration relationship, the circuit layout space in the edge display area PDR can be further increased, for example: the third pixel unit PU3A The driving circuit EC3A may have a larger layout space than the driving circuit EC3 of FIG. 6, and the driving circuit EC0A of the corner pixel unit PU0A may have a larger layout space than the driving circuit EC0 of FIG. 6. In other words, the design margin of the non-pixel driving circuit in the edge display area PDR can be improved, which helps to realize the narrow border (or no border) design of the display device 21.

FIG. 9 is a schematic top view of a display device according to a sixth embodiment of the invention. Please refer to FIG. 9, the difference between the display device 22 of this embodiment and the display device 21 of FIG. 8 is that the pad configuration of the second pixel unit is different. Specifically, the second pixel unit PU2A includes a pad BP2a and a pad BP2b. The pad BP2a and the pad BP2b have a length L2 and a length L4 in the direction D2, respectively, and the length L4 of the pad BP2b can be selectively smaller than the length L2 of the pad BP2a, but the invention is not limited thereto. In other embodiments, the length L4 of the pad BP2b may also be greater than the length L2 of the pad BP2a. In this embodiment, the length L4 of the pad BP2b of the second pixel unit PU2A can be selectively equal to the length L3' of the pad BP3A of the third pixel unit PU3A, but the invention is not limited thereto.

It is worth noting that through the above-mentioned configuration relationship, the circuit layout space in the edge display area PDR can be further increased. For example, the driving circuit EC2A of the second pixel unit PU2A can have a larger size than the driving circuit EC2 of FIG. Large layout space. In other words, the design margin of the non-pixel driving circuit in the edge display area PDR can be further improved, which helps to realize the narrow border (or no border) design of the display device 22.

On the other hand, they are connected to the pad BP2a and the pad of the second pixel unit PU2A. The light-emitting diode element LED2 and the light-emitting diode element LED3 electrically connected to the pad BP2b can emit light in different colors, such as green and blue. More specifically, the length of the two pads used to electrically connect two light-emitting diode elements (such as light-emitting diode element LED2 and light-emitting diode element LED3) in the same pixel unit can also be based on the light emission Adjust the yield or service life of the diode components.

FIG. 10 is a schematic top view of a display device according to a seventh embodiment of the invention. FIG. 11 is a schematic top view of the display device of FIG. 10 after repair. Please refer to FIG. 10, the difference between the display device 23 of this embodiment and the display device 20 of FIG. 6 is that the arrangement of the light-emitting diode elements is different. For example, in this embodiment, the light emitting diode element LED2 of the first pixel unit PU1B, the second pixel unit PU2B, the third pixel unit PU3B, and the corner pixel unit PU0B and the light emitting diode element LED2 in the direction D1 The staggering of the diode elements LED1 (or the light emitting diode element LED3) helps to improve the yield of the transfer process, but it is not limited to this.

Furthermore, when several pixel units of the display device 23 are detected to be abnormal, for example, during the lighting test, the third pixel unit PU3 cannot be activated due to the light-emitting diode element LED1x (that is, it cannot emit light). ) Is judged to be abnormal and can be repaired. The repairing step may include removing the abnormal light-emitting diode element LED1x and transferring and bonding the repairing light-emitting diode element to the pad BP3 to which the original abnormal light-emitting diode element LED1x is bonded. 11, the repaired display device 23R has an offset d'in the direction D2 between the light emitting diode element LED1r and the light emitting diode element LED3 of the repaired third pixel unit PU3Br, The light-emitting diode element has a width in the direction D2 w, and the ratio of the offset d'to the width w can be in the range of 0.8 to 1, but is not limited to this.

To sum up, in the display device of an embodiment of the present invention, the first pixel unit located in the central display area and the second pixel unit located in the edge display area have pads of different lengths, so that the two pixels Units have different layout spaces for circuit configuration. Accordingly, the design margin of the overall circuit of the display device can be increased, and it is helpful to realize a narrow frame or even a frameless design of the display device.

10: Display device

100: substrate

100a, 100e: edge

100S: Motherboard

BP0, BP1, BP2: pad

BPG1, BPG2: pad set

C: corner

CDR: Central display area

D1, D2: direction

EC0, EC1, EC2: drive circuit

LED1, LED2, LED3: light-emitting diode components

L0, L1, L2: length

PDR: Edge display area

PU0: corner pixel unit

PU1: The first pixel unit

PU2: second pixel unit

P1, P2, P3, P4: period

SBR: Side pad area

Claims (12)

A display device includes: A substrate having a central display area and an edge display area, wherein the edge display area is located between an edge of the substrate and the central display area; A plurality of first pixel units are arranged in the central display area, and the first pixel units include: A plurality of first pads are arranged along a first direction and extend in a second direction, the first pads have a first length in the second direction; and A first light emitting diode device electrically connected to the first pads; and A plurality of second pixel units are arranged in the edge display area, and the second pixel units include: A plurality of second pads arranged along the first direction and extending in the second direction, the second pads having a second length in the second direction; and A second light emitting diode device electrically connected to the second pads, The first length of the first pad is not equal to the second length of the second pad. The display device according to claim 1, wherein the length of the first light emitting diode element of the first pixel unit in the first direction is equal to the second light emitting diode of the second pixel unit The length of the pole body element in the first direction. The display device according to claim 1, wherein the second length of the second pad is smaller than the first length of the first pad. According to the display device described in claim 1, wherein the second pixel unit further includes: A plurality of third pads are arranged along the first direction and extend in the second direction; and A third light emitting diode element is electrically connected to the third pads, wherein the third pad has a third length in the second direction, and the third length is not equal to the second length. The display device according to claim 4, wherein the third length of the third pad is smaller than the second length of the second pad. According to the display device described in claim 4, the second light-emitting diode element and the third light-emitting diode element have different light-emitting colors. As for the display device described in claim 1, wherein the first light-emitting diode elements of the first pixel units are arranged along the first direction at equal intervals, and the second pixels The second light-emitting diode elements of the unit are arranged along the first direction at equal intervals, and the light-emitting colors of the first light-emitting diode elements and the second light-emitting diode elements are the same. The display device according to claim 1, wherein the first pads of the first pixel unit form a first pad group, and the first pads of the first pixel unit The group is arranged along the first direction in a first period, the second pads of the second pixel unit form a second pad group, and the second pads of the second pixel unit The groups are arranged along the first direction in a second period, the first light emitting diode element and the second light emitting diode element have the same light emitting color, and the first period is equal to the second period. According to the display device described in claim 1, wherein the ratio of the first length of the first pad to the second length of the second pad is 3:2. The display device described in item 1 of the scope of patent application further includes: A plurality of third pixel units are arranged in the edge display area, and the third pixel unit includes: A plurality of third pads are arranged along the first direction and extend in the second direction, and the third pads have a third length in the second direction; and A third light emitting diode device electrically connected to the third pads, The third pixel units are farther away from the first pixel units than the second pixel units, and the third length of the third pad is smaller than the second length of the second pad, And the second length of the second pad is smaller than the first length of the first pad. The display device according to claim 10, wherein the ratio of the first length of the first pad, the second length of the second pad, and the third length of the third pad is 3 : 2:1. The display device described in item 1 of the scope of patent application further includes: A corner pixel unit is disposed at a corner of the edge display area, and the corner pixel unit includes: A plurality of third pads are arranged along the first direction and extend in the second direction, and the third pads have a third length in the second direction; and A third light emitting diode device electrically connected to the third pads, The ratio of the first length of the first pad, the second length of the second pad, and the third length of the third pad is 3:2:1.

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