CN111862839A

CN111862839A - Display device

Info

Publication number: CN111862839A
Application number: CN202010749197.4A
Authority: CN
Inventors: 吴尚杰; 郭豫杰; 郑和宜; 张哲嘉; 陈宜瑢; 陈一帆; 邱郁勋; 李玫忆
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2020-02-18
Filing date: 2020-07-30
Publication date: 2020-10-30
Anticipated expiration: 2040-07-30
Also published as: CN111862839B; TW202133134A; TWI717217B

Abstract

A display device comprises a substrate, a first pixel unit and a second pixel unit. The first pixel units are arranged in the central display area of the substrate and respectively comprise first connecting pads arranged along a first direction and first light-emitting diode elements electrically connected to the first connecting pads. The first light emitting diode elements of the first pixel unit are arranged at a first distance in the second direction. The second pixel unit is arranged in the edge display area of the substrate and comprises second connecting pads and second light-emitting diode elements electrically connected to the second connecting pads. A second distance between the second light emitting diode element arranged in the second direction and the adjacent first light emitting diode element is equal to the first distance. The first connecting pads of two adjacent first pixel units are arranged in the second direction at a third distance. The second connecting pads of the second pixel units and the first connecting pads of the adjacent first pixel units are arranged in the second direction by a fourth distance, and the third distance is not equal to the fourth distance.

Description

Display device

Technical Field

The present disclosure relates to electronic devices, and particularly to a display device.

Background

The light emitting diode display panel comprises an active element substrate and a plurality of light emitting diode elements which are transposed on the active element substrate. The characteristics of the light emitting diode are inherited, and the light emitting diode display panel has the advantages of electricity saving, high efficiency, high brightness, quick response time and the like. In addition, compared with the organic light emitting diode display panel, the light emitting diode display panel also has the advantages of easy color adjustment, long light emitting life, no image branding and the like. Therefore, the led display panel is considered as the next generation display technology. However, since the periphery of the led display panel is provided with a circuit without a display function, it is not easy to realize a narrow-frame led display panel or even a frameless led display panel.

Disclosure of Invention

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

The display device comprises a substrate, a plurality of first pixel units and a second pixel unit. The substrate has a central display area and an edge display area. The edge display area is located between the first edge of the substrate and the central display area. The first pixel units are arranged in the central display area and respectively comprise a plurality of first connecting pads and first light emitting diode elements. The first pads are arranged along a first direction and extend in a second direction. The first LED element is electrically connected with the first connecting pads. The plurality of first light emitting diode elements of the plurality of first pixel units are arranged at a first distance in the second direction. The second pixel units are arranged in the edge display area and are arranged with the plurality of first pixel units in a second direction. The second pixel unit comprises a plurality of second connecting pads and a second light emitting diode element. The second pads are arranged along a first direction and extend in a second direction. The second light emitting diode element is electrically connected to the second pads. The second light emitting diode elements and the adjacent first light emitting diode elements are arranged at a second distance in the second direction, and the second distance is equal to the first distance. The first connecting pads of two adjacent first pixel units are arranged in the second direction at a third distance. The second connecting pads of the second pixel units and the first connecting pads of the adjacent first pixel units are arranged in the second direction by a fourth distance, and the third distance is not equal to the fourth distance.

In view of the above, in the display device according to the embodiment of the invention, the plurality of first light emitting diode elements of the plurality of first pixel units located in the central display area and the second light emitting diode elements of the second pixel units located in the edge display area are arranged in a direction at equal intervals. The distance between the first connecting pads of the first pixel units arranged in the direction is not equal to the distance between the second connecting pad of the second pixel unit arranged in the direction and the first connecting pad of the adjacent first pixel unit, so that the layout spaces of the two pixel units for circuit configuration are different. Therefore, the design margin of the whole circuit of the display device can be increased, and the narrow frame design and even the frameless design of the display device are facilitated.

Drawings

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

Fig. 2 and 3 are enlarged schematic views of two partial regions of the display device of fig. 1.

Fig. 4 is a schematic top view of a display device according to a second embodiment of the present invention.

Fig. 5 is a schematic top view of a display device according to a third embodiment of the present invention.

Fig. 6 is a schematic top view of a display device according to a fourth embodiment of the present invention.

Fig. 7 is a schematic top view of the display device of fig. 6 after being repaired.

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

Fig. 9 is an enlarged schematic view of a partial region of the display device of fig. 8.

Fig. 10 is a schematic top view of a display device according to a sixth embodiment of the present invention.

Fig. 11 is a schematic top view of the display device of fig. 10 after being repaired.

The reference numbers are as follows:

10. 11, 12, 13R, 20, 21R display device

100 substrate

100a, 100b, 100c, 100d, 100e edges

100S mother board

BP0, BP0 ', BP0A, BP1, BP2, BP2 ', BP2 ', BP2A and BP3 contact pads

BPG0, BPG0 ', BPG1, BPG2, BPG 2' and pad group

BR0, BR1, BR2, BR3, splice region

C. Corner at C

D1 and D2 directions

d 1-d 12 distance

CDR Central display area

EC0, EC 0', EC0A, EC0B, EC0C, EC1, EC2, EC2A, EC2B, EC2C, EC2D, EC3, EC3A drive circuit

LED1, LED1x, LED1r, LED2, LED2x, LED2r, LED3, light emitting diode element

L0, L0 ', L0', L1, L2, L2 ', L2' (length)

PDR edge display region

PU0, PU 0', PU0A, PU0B and PU0C corner pixel units

PU1, PU1r first pixel unit

PU2, PU2A, PU2B, PU2C, PU2Cr, PU2D, second pixel unit

PU3, PU3A third pixel unit

RR0, RR0 ', RR1, RR2, RR2 ', RR2 ', RR2a, RR2b, RR3 spare area

SBR with side pad region

S1, S2 distance

W is width

I. II, III region

Detailed Description

As used herein, "about", "approximately", "essentially" or "substantially" includes the stated value and the average value within an acceptable range of deviation of the specified value as determined by one of ordinary skill in the art, taking into account the measurement in question and the specified 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, for example, ± 30%, ± 20%, ± 15%, ± 10%, ± 5%. Further, as used herein, "about", "approximately", "essentially" or "substantially" may be selected with respect to measured properties, cutting properties or other properties to select a more acceptable range of deviation or standard deviation, and not all properties may be applied with one standard deviation.

In the drawings, the thickness of layers, films, panels, regions, etc. have been 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 intervening 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 connections. Further, "electrically connected" may mean that there are other elements between the two elements.

Furthermore, 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. It will be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in one of the figures is turned over, elements described as being on the "lower" side of other elements would then be oriented on "upper" sides of the other elements. Thus, the exemplary term "lower" can include both an orientation of "lower" and "upper," depending on the particular orientation of the figure. 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 "above" or "below" may include both an orientation of above and below.

Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.

Fig. 1 is a schematic top view of a display device according to a first embodiment of the present invention. Fig. 2 is an enlarged schematic view of a partial region I of the display device of fig. 1. Fig. 3 is an enlarged schematic view of a partial region II of the display device of fig. 1. For the sake of clarity, fig. 1 omits the illustration of the bonding pads, the led elements, the driving circuit and the side pad region SBR in fig. 2 and 3. Specifically, fig. 1 to 3 show the substrate 100 that has not been cut from the motherboard 100S, and the edge of the substrate 100 cut from the motherboard 100S is substantially located at the dotted line indicated by the

reference numerals

100a, 100b, 100c and 100 d.

Referring to fig. 1 and 2, a display device 10 includes a substrate 100 and a plurality of pixel units. The substrate 100 has a central display region CDR and an edge display region PDR, and the edge display region PDR is located between the edge 100a of the substrate 100 (or the edge 100e of the motherboard 100S) and the central display region CDR. The plurality of pixel units includes a first pixel unit PU1, a second pixel unit PU2, and a corner pixel unit PU 0. The first pixel unit PU1 is disposed in the central display region CDR of the substrate 100. The second pixel unit PU2 is disposed in the edge display region PDR of the substrate 100. The corner pixel unit PU0 is disposed at the corner C of the edge display region PDR. In the present embodiment, the substrate 100 may be made of glass, quartz, organic polymer, opaque/reflective material (e.g., wafer, ceramic, or other suitable material) or other suitable materials.

Further, the pixel unit includes a plurality of pads and a light emitting diode device, and the light emitting diode device is electrically connected to the pads. In the present embodiment, the number of the pads of each pixel unit and the number of the light emitting diode elements are exemplarily illustrated by six (i.e. three groups) and three, respectively, which does not mean that the disclosure of the drawings is limited in the present invention. In other embodiments, the number of the pads and the number of the light emitting diode elements of each pixel unit can be adjusted to one, two or more than four according to actual design requirements. For example, in the present embodiment, the three LED devices arranged in the direction D1 of each pixel unit (e.g., the first pixel unit PU1, the second pixel unit PU2, and the corner pixel unit PU0) are the LED device LED1, the LED device LED2, and the LED device LED3, and the light emitting colors of the LED devices can be selected from red, green, and blue, respectively, to meet the requirement of color mixing, but not limited thereto.

It is noted that the length of the led element of the first pixel unit PU1 in the direction D1 is equal to the length of the led element of the second pixel unit PU2 in the direction D1. Similarly, the length of the led element of the first pixel unit PU1 in the direction D2 is equal to the length of the led element of the second pixel unit PU2 in the direction D2. That is, the size of the led elements of the first pixel unit PU1 and the second pixel unit PU2 are the same.

On the other hand, the pads BP1 of the first pixel unit PU1 are arranged in the direction D1 and extend in the direction D2, and the pad BP1 has 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 pad BP2 has a length L2 in the direction D2. In the embodiment, the length L1 of the pad BP1 of the first pixel unit PU1 is equal to the length L2 of the pad BP2 of the second pixel unit PU2, but the invention is not limited thereto. 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 is optionally equal to the length L2 of the pad BP2 of the second pixel unit PU2 (or the length L1 of the pad BP1 of the first pixel unit PU 1), but the invention is not limited thereto.

In the present embodiment, the six pads of each pixel unit (e.g., the first pixel unit PU1, the second pixel unit PU2, and the corner pixel unit PU0) may form three pad sets, and three light emitting diode devices (e.g., the light emitting diode device LED1, the light emitting diode device LED2, and the light emitting diode device LED3) are respectively and electrically connected to the three pad sets, but not limited thereto.

It is noted that the two light emitting diode elements (e.g., the light emitting diode element LED1, the light emitting diode element LED2, or the light emitting diode element LED3) of the two first pixel units PU1 arranged and adjacent in the direction D2 are spaced apart in the direction D2 by the first distance D1. The two LED elements (e.g., LED1, LED2, or LED3) of the first pixel unit PU1 and the second pixel unit PU2, which are arranged and adjacent to each other in the direction D2, are spaced apart from each other in the direction D2 by a second distance D2, and the second distance D2 is equal to the first distance D1.

On the other hand, any two pad groups BPG1 of any two adjacent first pixel units PU1 arranged in the direction D2 and electrically connected to two light emitting diode devices (e.g., the light emitting diode device LED1, the light emitting diode device LED2, or the light emitting diode device LED3) are spaced apart from each other in the direction D2 by a third distance D3. The pad group BPG2 and the pad group BPG1, which are arranged in the direction D2 and electrically connected to two light emitting diode devices (e.g., the light emitting diode device LED1, the light emitting diode device LED2, or the light emitting diode device LED3) respectively in the adjacent second pixel unit PU2 and the first pixel unit PU1, are spaced apart from each other by a fourth distance D4 in the direction D2, and the third distance D3 is not equal to the fourth distance D4. That is, the bonding position of the led device of the first pixel unit PU1 on the pad is different from the bonding position of the led device of the second pixel unit PU2 on the pad.

More specifically, the pad BP1 of the first pixel unit PU1 has a bonding region BR1 overlapping the LED element (e.g., the LED element LED1, the LED element LED2, or the LED element LED3) and a spare region RR1 outside the bonding region BR 1. The pad BP2 of the second pixel unit PU2 has a bonding region BR2 overlapping the LED element (e.g., LED1, LED2, or LED3) and a spare region RR2 outside the bonding region BR 2. It should be noted that the led devices of the first pixel unit PU1 and the second pixel unit PU2 are located between the spare regions RR1 and RR2 of the pads BP1 and BP2 in the direction D2. That is, the spare regions RR1 and RR2 of the pads BP1 and BP2 of the first and second pixel units PU1 and PU2 are mirror images of the led devices of the two pixel units. Accordingly, the circuit layout space of the edge display region PDR can be increased, which is helpful for implementing a narrow frame, even a frameless design of the display device 10.

On the other hand, the two pad groups BPG1, which are arranged in the direction D1 and electrically connected to the two LED elements LED1 respectively and adjacent to the two first pixel units PU1, are spaced apart by a fifth distance D5. The two pad groups BPG2 of the two second pixel units PU2 arranged in the direction D1 and electrically connected to the two LED elements LED1 are spaced apart by a sixth distance D6, and the fifth distance D5 is equal to the sixth distance D6. From another point of view, a plurality of light emitting diode elements (e.g., the light emitting diode element LED1, the light emitting diode element LED2, or the light emitting diode element LED3) for emitting light beams of the same color are arranged at equal intervals along the direction D1 or the direction D2.

In the present embodiment, the corner pixel units PU0 in the edge display region PDR are adjacent to the edge 100a and the edge 100b connected to the substrate 100. That is, the corner pixel unit PU0 is located between the edge 100b of the substrate 100 and the second pixel unit PU 2. The corner pixel unit PU0 includes a plurality of pads BP0 and led devices electrically connected to the pads BP 0. It is noted that the two LED elements (e.g., the LED element LED1, the LED element LED2, or the LED element LED3) of the first pixel unit PU1 and the corner pixel unit PU0, which are arranged and adjacent in the direction D2, are spaced apart in the direction D2 by a seventh distance D7, and the seventh distance D7 is equal to the first distance D1.

On the other hand, the pad group BPG0 and the pad group BPG1, which are arranged in the direction D2 and are electrically connected to the two light emitting diode devices (e.g., the light emitting diode device LED1, the light emitting diode device LED2, or the light emitting diode device LED3) in the adjacent corner pixel unit PU0 and the first pixel unit PU1, respectively, are spaced apart from each other by an eighth distance D8 in the direction D2. In the present embodiment, the eighth distance d8 is not equal to the third distance d3 and equal to the fourth distance d4, but not limited thereto. That is, the bonding position of the led device of the corner pixel unit PU0 on the pad is different from the bonding position of the led device of the first pixel unit PU1 on the pad.

More specifically, the pad BP0 of the corner pixel unit PU0 has a bonding region BR0 overlapping the LED device (e.g., the LED device LED1, the LED device LED2, or the LED device LED3) and a spare region RR0 outside the bonding region BR 0. It should be noted that the led devices of the corner pixel unit PU0 and the first pixel unit PU1 are located between the spare regions RR1 and RR0 of the pads BP1 and BP0 in the direction D2. That is to say, the spare regions RR0 and RR1 of the pads BP0 and BP1 of the corner pixel unit PU0 and the first pixel unit PU1 are mirror images of the led devices of the two pixel units, but the invention is not limited thereto.

Further, the display device 10 may further include another corner pixel unit PU0 'located at another corner C' of the edge display region PDR. The corner pixel unit PU 0' is adjacent to the edge 100a and the edge 100c connected to the substrate 100, wherein the edge 100c is disposed opposite to the edge 100 b. That is, the corner pixel unit PU 0' is located between the edge 100c of the substrate 100 and the second pixel unit PU 2. It is noted that the pad group BPG0 'and the pad group BPG1, which are arranged in the direction D2 and are electrically connected to two light emitting diode devices (e.g., the light emitting diode device LED1, the light emitting diode device LED2 or the light emitting diode device LED3) in the adjacent corner pixel unit PU 0' and the first pixel unit PU1, are spaced apart from each other by a ninth distance D9 in the direction D2. The ninth distance d9 is not equal to the eighth distance d8 and is equal to the third distance d 3. That is, the bonding position of the led device of the corner pixel unit PU 0' on the pad is the same as the bonding position of the led device of the first pixel unit PU1 on the pad.

More specifically, the spare region RR0 of the pad BP0 ' of the corner pixel unit PU0 ' is located between the led device of the corner pixel unit PU0 ' and the led device of the adjacent first pixel unit PU1, and the led device of the first pixel unit PU1 is located between the spare region RR0 of the pad BP0 ' of the corner pixel unit PU0 ' and the spare region RR1 of the pad BP1 of the first pixel unit PU 1. That is, the spare regions RR0 and RR1 of the pads BP0 'and BP1 of the corner pixel unit PU 0' and the first pixel unit PU1 are not mirror images of the led devices of the two pixel units. It should be noted that, in the embodiment, the first distance d1 to the ninth distance d9 are all defined by a distance between geometric centers of two members (e.g., a pad or a light emitting diode device), but not limited thereto. For example, the first to ninth distances d 1-d 9 may also be defined as the distance between the edges of two members.

Further, 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, the corner pixel unit PU0 has a driving circuit EC0, and the corner pixel unit PU0 'has a driving circuit EC 0', and these driving circuits can be electrically connected to the corresponding pads respectively to provide the current (or voltage) required when the led device is enabled. The driving circuit includes a pixel driving circuit for driving the pixel unit. To achieve a narrow-bezel (or frameless) design of the display device 10, the driving circuit EC2 of the second pixel unit PU2, the driving circuit EC0 of the corner pixel unit PU0, and the driving circuit EC0 'of the corner pixel unit PU 0', respectively, may further include non-pixel driving circuits. For example, the non-pixel driving circuit is, for example, a Multiplexer (MUX), an integrated gate-on-array (GOA), an electrostatic discharge (ESD) circuit, a TEST (TEST) circuit, or a combination thereof.

From another perspective, since the spare regions RR1 and RR2 of the pads BP1 and BP2 of the first and second pixel units PU1 and PU2 are arranged in a mirror image with respect to the led devices of the two pixel units, the circuit layout space of the edge display region PDR can be increased to configure the non-pixel driving circuit. Accordingly, a narrow bezel (or frameless) design of the display device 10 is facilitated. On the other hand, the increased circuit layout space in the edge display region may also be used to configure a side pad region SBR, and the side pad region SBR may be provided with side pads (not shown), the side pads may be electrically connected to wires (not shown) located on the side wall of the substrate 100, and signal lines (e.g., data lines, scan lines, power lines, common lines, or other circuit traces) located on one side surface of the substrate 100 where the pads are located may be electrically connected to fan-out traces (not shown) and/or chips (not shown) located 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.

The present disclosure will be described in detail below with reference to other embodiments, wherein like components are denoted by like reference numerals, and descriptions of the same technical content are omitted, and reference is made to the foregoing embodiments for omitting details.

Fig. 4 is a schematic top view of a display device according to a second embodiment of the present invention. Referring to fig. 4, the main differences between the display device 11 of the present embodiment and the display device 10 of fig. 2 are: the pad configuration modes of the second pixel units are different. Specifically, the second pixel unit PU2 'of the display device 11 has two pad groups, such as the pad group BPG2 and the pad group BPG 2', configured in different manners. In this embodiment, the spare regions RR2 'of the pads BP 2' of the pad group BPG2 'and the spare regions RR2 of the pads BP2 of the pad group BPG2 are respectively located at two opposite sides of the led device of the second pixel unit PU 2'. That is, the LED devices LED1, LED2 and LED3 of the second pixel unit PU2 ' are located between the spare regions RR2 and RR2 ' of the pads BP2 and BP2 '.

It should be noted that the spare regions RR2 ' of the pads BP2 ' of the second pixel unit PU2 ' and the spare regions RR1 of the pads BP1 of the adjacent first pixel unit PU1 are not mirror images of the led devices of the two pixel units. For example, the pad group BPG 2' and the pad group BPG1, which are arranged in the direction D2 and electrically connected to two light emitting diode devices (e.g., the light emitting diode device LED1, the light emitting diode device LED2, or the light emitting diode device LED3) respectively in the adjacent second pixel unit PU2A and the first pixel unit PU1, are spaced apart from each other by a tenth distance D10 in the direction D2. In the present embodiment, the tenth distance d10 is not equal to the fourth distance d4 and is equal to the third distance d3, but not limited thereto.

In the present embodiment, the light emitting color of the light emitting diode element (e.g., the light emitting diode element LED1) electrically connected to the pad group BPG 2' is, for example, red, and the light emitting color of the light emitting diode element (e.g., the light emitting diode element LED2 or the light emitting diode element LED3) electrically connected to the pad group BPG2 is, for example, green or blue, but not limited thereto. That is, the light emitting color of the led device electrically connected to the pad group BPG 2' is different from the light emitting color of the led device electrically connected to the pad group BPG 2.

In the present embodiment, the arrangement relationship between the pad BP2 of the second pixel unit PU 2' and the pad BP1 of the first pixel unit PU1 with respect to the plurality of led devices of the two pixel units is similar to that of the display device 10 of the previous embodiment. Therefore, the detailed description is referred to the related paragraphs of the foregoing embodiments, and will not be repeated here. It should be noted that, since the spare regions RR1 of the pad BP1 of the first pixel unit PU1 and RR2 of the pad BP2 of the second pixel unit PU 2' are arranged in a mirror image manner with respect to the led devices of the two pixel units, the circuit layout space of the edge display region PDR can be increased. For example, the layout area of the driving circuit EC2A of the second pixel unit PU2A may be larger than the layout space of the driving circuit EC1 of the first pixel unit PU 1. Thereby, a narrow bezel, even a bezel-less design of the display device 11 is facilitated.

Fig. 5 is a schematic top view of a display device according to a third embodiment of the present invention. Referring to fig. 5, the main differences between the display device 12 of the present embodiment and the display device 10 of fig. 2 are: the lengths of the connecting pads of the second pixel unit and the corner pixel unit are different. Specifically, the length L2' of the pad BP2 ″ of the second pixel unit PU2B of the display device 12 in the direction D2 may be smaller than the length L1 of the pad BP1 of the first pixel unit PU1 in the direction D2. For example, in the embodiment, the ratio of the length L2' of the pad BP2 ″ to the length L1 of the pad BP1 is 2:3, so that the layout space of the driving circuit EC2B of the second pixel unit PU2B is larger than that of the driving circuit EC1 of the first pixel unit PU1, but not limited thereto. In other words, the circuit layout space of the edge display region PDR can be increased, which is helpful for realizing a narrow-frame, even frameless design of the display device 12.

On the other hand, the ratio of the length L0' of the pad BP0A of the corner pixel unit PU0A to the length L1 of the pad BP1 of the first pixel unit PU1 may also be 2: 3. That is, the length L0 'of the pad BP0A of the corner pixel unit PU0A and the length L2' of the pad BP2 ″ of the second pixel unit PU2B may be the same, but not limited thereto. In other embodiments, 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 PU2B, and the length L0' of the pad BP0A of the corner pixel unit PU0A may also be 3:2: 1. More specifically, the pads of the corner pixel cells are not provided with the spare region RR0 (i.e., the corner pixel cells cannot be repaired).

Particularly, the times that the pads with different lengths can provide for repairing (repair) the led device are also different. For example, in the embodiment, the spare region RR1 of the pad BP1 of the first pixel unit PU1 is suitable for providing two repairs, and the spare region RR2 "of the pad BP 2" of the second pixel unit PU2B and the spare region RR 0' of the pad BP0A of the corner pixel unit PU0A are suitable for providing one repair, but the invention is not limited thereto. According to other embodiments, the number of times of repairing the pixel unit (or the length of the pad) may also be adjusted according to actual product requirements (e.g., process yield, circuit design).

Fig. 6 is a schematic top view of a display device according to a fourth embodiment of the present invention. Fig. 7 is a schematic top view of the display device of fig. 6 after being repaired. Referring to fig. 6, the main differences between the display device 13 of the present embodiment and the display device 12 of fig. 5 are: the second pixel unit and the corner pixel unit have different connecting pads. Specifically, the second pixel unit PU2C includes a pad BP2 and a pad BP2 ″ having different lengths. In the embodiment, the ratio of the length L2 ″ of the pad BP2 of the second pixel unit PU2C in the direction D2 to the length L2' of the pad BP2 "in the direction D2 may be 3:2, but not limited thereto. On the other hand, the corner pixel unit PU0B may also include a pad BP0 and a pad BP0A with different lengths. In the embodiment, the ratio of the length L0 ″ of the pad BP0 of the corner pixel unit PU0B in the direction D2 to the length L0' of the pad BP0A in the direction D2 may be 3:2, but not limited thereto.

It should be noted that, since the spare regions RR1 of the pad BP1 of the first pixel unit PU1 and the spare region RR2 of the pad BP2 of the second pixel unit PU2C (or the spare region RR2 of the pad BP2 ″ of the second pixel unit PU 2C) are respectively located at two opposite sides of the led devices of the two pixel units, the circuit layout space of the edge display region PDR can be increased. For example, the layout area of the driving circuit EC2C of the second pixel unit PU2C may be larger than the layout space of the driving circuit EC1 of the first pixel unit PU 1. Similarly, the spare regions RR0 of the pad BP0 of the corner pixel unit PU0B (or the spare region RR 0' of the pad BP 0A) and the spare region RR1 of the pad BP1 of the first pixel unit PU1 are respectively located at two opposite sides of the led devices of the two pixel units, so as to further increase the circuit layout space of the edge display region PDR. For example, a layout area of the driving circuit EC0B of the corner pixel unit PU0B may be larger than a layout space of the driving circuit EC1 of the first pixel unit PU 1. This helps to achieve a narrow bezel, even a bezel-less design, for the display device 13.

Further, when several pixel cells of the display device 13 are detected to be abnormal, for example: in the lighting test, the second pixel unit PU2C is determined to be abnormal because the LED element LED2x cannot be enabled (i.e., cannot emit light), and a repairing step can be performed. The repairing step may include removing the abnormal LED device LED2x and transferring (transferring) the repaired LED device to the bonding pad BP2 ″ bonded to the abnormal LED device LED2 x. Referring to fig. 7, in the repaired display device 13R, a distance S1 (or offset) is provided between the LED element LED2R and the LED element LED3 of the repaired second pixel unit PU2Cr in the direction D2, the LED element has a width W in the direction D2, and a ratio of the distance S1 to the width W may be in a range of 0.8 to 1, but the invention is not limited thereto. In other embodiments, when the LED1 of the second pixel unit PU2C is determined to be abnormal, the ratio of the pitch (or offset) between the position of the repaired LED on the pad BP2 and the position of the original abnormal LED on the same pad BP2 to the width W may also be in the range of 1 to 2.

Fig. 8 is a schematic top view of a display device according to a fifth embodiment of the present invention. Fig. 9 is an enlarged schematic view of a partial region of the display device of fig. 8. Referring to fig. 8 and 9, the main differences between the display device 20 of the present embodiment and the display device 10 of fig. 1 and 2 are: the display device 20 further includes a third pixel unit PU3 disposed in the edge display region PDR. In detail, the third pixel unit PU3 is located between the edge 100a of the substrate 100 and the second pixel unit PU 2. The pads BP3 of the third pixel unit PU3 are arranged in the direction D1 and extend in the direction D2. It is noted that the led elements of the second pixel unit PU2 and the led elements of the third pixel unit arranged and adjacent to each other in the direction D2 are spaced apart from each other in the direction D2 by an eleventh distance D11, and the eleventh distance D11 is equal to the second distance D2 (or the first distance D1).

On the other hand, the pads BP2 of the second pixel unit PU2 and the third pixel unit PU3, which are arranged in the direction D2 and adjacent to each other, electrically connected to two light emitting diode devices (e.g., the light emitting diode device LED1, the light emitting diode device LED2, or the light emitting diode device LED3) are spaced apart from each other by a twelfth distance D12 in the direction D2. In the present embodiment, the twelfth distance d12 is not equal to the fourth distance d4 and equal to the third distance d3, but not limited thereto. That is, the bonding position of the led device of the third pixel unit PU3 on the pad BP3 is the same as the bonding position of the led device of the second pixel unit PU2 on the pad BP2, but is different from the bonding position of the led device of the first pixel unit PU1 on the pad BP 1.

More specifically, the pad BP3 of the third pixel unit PU3 has a bonding region BR3 overlapping the LED element (e.g., the LED element LED1, the LED element LED2, or the LED element LED3) and a spare region RR3 outside the bonding region BR 3. The led device of the third pixel unit PU3 is located between the spare regions RR3 and RR2 of the pads BP3 and BP2 in the direction D2, and the spare region RR2 of the pad BP2 is located between the led device of the third pixel unit PU3 and the led device of the second pixel unit PU2 in the direction D2. That is, the spare regions RR3 and RR2 of the pads BP3 and BP2 of the third and second pixel units PU3 and PU2 are not mirror images of the led devices of the two pixel units.

From another perspective, the spare regions RR1 of the pads BP1 of the first pixel unit PU1 and the spare region RR3 of the pads BP3 of the third pixel unit PU3 (or the spare region RR2 of the pads BP2 of the second pixel unit PU 2) are configured as mirror images with respect to the led devices of the two pixel units. Accordingly, the circuit layout space of the edge display region PDR can be increased, which is helpful for realizing a narrow frame, even a frameless design of the display device 20.

Particularly, in the embodiment, the spare region RR0 of the pad BP0 of the corner pixel unit PU0C is located between the led devices of the corner pixel unit PU0C and the led devices of the first pixel unit PU1 in the direction D2. That is, the spare regions RR0 and RR1 of the pads BP0 and BP1 of the corner pixel unit PU0C and the first pixel unit PU1 are not mirror images of the led devices of the two pixel units. Accordingly, a layout space of the driving circuit EC0C of the corner pixel unit PU0C can be increased.

Fig. 10 is a schematic top view of a display device according to a sixth embodiment of the present invention. Fig. 11 is a schematic top view of the display device of fig. 10 after being repaired. Referring to fig. 10, the main differences between the display device 21 of the present embodiment and the display device 20 of fig. 9 are: the pad configuration modes of the second pixel units are different. Specifically, the pad BP2A of the second pixel unit PU2D of the display device 21 has two separate spare areas, namely a spare area RR2a and a spare area RR2 b. The two spare areas of the pad BP2A are located at two opposite sides of the bonding area BR 2.

In this embodiment, the led device of the third pixel unit PU3 is located between the spare region RR3 of the pad BP3 and the spare region RR2a of the pad BP2A of the second pixel unit PU2D, and the led device of the second pixel unit PU2D is located between the spare region RR2a of the pad BP2A and the spare region RR2 b. That is, the spare regions RR3 and RR2a of the pads BP3 and BP2A of the third and second pixel units PU3 and PU2D are not mirror images of the led devices of the two pixel units. Accordingly, the layout space of the driving circuit EC3A of the third pixel unit PU3A can be increased, which helps to realize a narrow bezel of the display device 21, even a bezel-free design. It should be noted that, by the above-mentioned configuration of the pad BP2A, the configuration flexibility of the driving circuit in the edge display region PDR can be increased.

Further, when several pixel cells of the display device 21 are detected to be abnormal, for example: in the lighting test, the first pixel unit PU1 is determined to be abnormal because the LED device LED1x cannot be enabled (i.e., cannot emit light), and a repairing step can be performed. The repairing step may include removing the abnormal LED device LED1x and transferring (transferring) the repaired LED device to the bonding pad BP1 bonded to the abnormal LED device LED1 x. Referring to fig. 11, in the repaired display device 21R, a distance S2 (or offset) exists between the light emitting diode element LED1R of the repaired first pixel unit PU1R and the original abnormal light emitting diode element LED1x in the direction D2, and the light emitting diode element LED1R has a width W in the direction D2, and a ratio of the distance S2 to the width W may be in a range of 0.8 to 2.

In summary, in the display device of the embodiment of the invention, the first light emitting diode elements of the first pixel units in the central display area and the second light emitting diode elements of the second pixel units in the edge display area are arranged in a direction with an equal pitch. The distance between the first connecting pads of the first pixel units arranged in the direction is not equal to the distance between the second connecting pad of the second pixel unit arranged in the direction and the first connecting pad of the adjacent first pixel unit, so that the layout spaces of the two pixel units for circuit configuration are different. Therefore, the design margin of the whole circuit of the display device can be increased, and the narrow frame design and even the frameless design of the display device are facilitated.

Claims

1. A display device, comprising:

a substrate having a central display region and an edge display region, wherein the edge display region is located between a first edge of the substrate and the central display region;

a plurality of first pixel units disposed in the central display area, the first pixel units comprising:

a plurality of first pads arranged along a first direction and extending in a second direction; and

a first light emitting diode element electrically connected to the first pads, wherein the first light emitting diode elements of the first pixel units are arranged at a first distance in the second direction; and

a second pixel unit disposed in the edge display region and arranged with the plurality of first pixel units in the second direction, the second pixel unit comprising:

a plurality of second pads arranged along the first direction and extending in the second direction; and

a second LED element electrically connected to the second pads, the second LED element and the adjacent first LED element being arranged at a second distance in the second direction, the second distance being equal to the first distance,

the second connecting pads of the second pixel units and the first connecting pads of the adjacent first pixel units are arranged in the second direction at a fourth distance, and the third distance is not equal to the fourth distance.

2. The display device as claimed in claim 1, wherein the first pad of the first pixel unit has a first bonding area overlapping the first led element and located at one side of the first pad and a first spare area outside the first bonding area, the second pad of the second pixel unit has a second bonding area overlapping the second led element and located at one side of the second pad and a second spare area outside the second bonding area, and the first led element and the second led element are located between the first spare area of the first pad and the second spare area of the second pad.

3. The display device according to claim 2, wherein the first light emitting diode element and the second light emitting diode element emit light of the same color, and are blue or green.

4. The display device of claim 2, wherein the second pixel cell further comprises:

a plurality of third pads arranged along the first direction and extending in the second direction; and

and a third light emitting diode element electrically connected to the third pads, wherein the third pads have a third bonding area overlapping the third light emitting diode element and located at one side of the third pads and a third spare area outside the third bonding area, and the second light emitting diode element and the third light emitting diode element are located between the second spare area of the second pads and the third spare area of the third pads.

5. The display device according to claim 4, wherein the first light emitting diode element and the second light emitting diode element emit light of the same color, and the third light emitting diode element emits light of a color different from that of the first light emitting diode element.

6. The display device according to claim 5, wherein the third light emitting diode element emits light of a color of red.

7. The display device of claim 2, further comprising:

a third pixel unit disposed in the edge display region, the third pixel unit being located between the second pixel unit and the first edge of the substrate, and including:

a third LED element electrically connected to the third pads,

the third pad has a third bonding area overlapping the third led element and located at one side of the third pad and a third spare area outside the third bonding area, and the first led element and the third led element are located between the third spare area of the third pad and the first spare area of the first pad.

8. The display device of claim 2, further comprising:

a first corner pixel unit disposed in the edge display region and adjacent to the first edge of the substrate and a second edge connected to the first edge, the first corner pixel unit being located between the second edge and the second pixel unit and including:

a third LED element electrically connected to the third pads, the third LED element and the second LED element being arranged in the first direction,

the third pad has a third bonding area overlapping the third led element and located at one side of the third pad, and a third spare area outside the third bonding area, the third spare area is located between the third led element and the first led element, and the first led element is located between the third spare area and the first spare area.

9. The display device of claim 8, further comprising:

a second corner pixel cell disposed in the edge display region and adjacent to the first edge of the substrate and a third edge connected to the first edge, the third edge being opposite to the second edge, the second corner pixel cell being located between the third edge and the second pixel cell and comprising:

a plurality of fourth pads arranged along the first direction and extending in the second direction; and

a fourth LED element electrically connected to the fourth pads, the fourth LED element and the second LED element being arranged in the first direction,

the fourth pad has a fourth bonding area overlapping the fourth led element and located at one side of the fourth pad, and a fourth spare area outside the fourth bonding area, and the first led element and the fourth led element are located between the first spare area and the fourth spare area.

10. The display device as claimed in claim 1, wherein the first pad of the first pixel unit has a first bonding area overlapping the first led element and located at one side of the first pad and a first spare area outside the first bonding area, the second pad of the second pixel unit has a second bonding area overlapping the second led element and a second spare area and a third spare area located at two opposite sides of the second bonding area, the first led element is located between the first spare area and the third spare area, and the third spare area is located between the first led element and the second led element.

11. The display device of claim 10, further comprising:

a third LED element electrically connected to the third pads,

the third pad has a third bonding area overlapping the third led element and located at one side of the third pad and a fourth spare area outside the third bonding area, and the third led element is located between the second spare area of the second pad and the fourth spare area of the third pad.

12. The display device as claimed in claim 1, wherein the first pad and the second pad have a first length and a second length in the second direction, respectively, and the first length of the first pad is greater than the second length of the second pad.

13. The display device of claim 1, wherein the second pixel cell further comprises:

and a third LED element electrically connected to the third pads, wherein the second and third pads have a first length and a second length in the second direction, and the first length is not equal to the second length.

14. The display device of claim 1, wherein the second pixel cell further comprises:

and a third light emitting diode element electrically connected to the third pad, wherein the second light emitting diode element and the third light emitting diode element have a distance in the second direction, the third light emitting diode element has a width in the second direction, and the ratio of the distance to the width is between 0.8 and 2.

15. The display device of claim 1, wherein the first pixel cell further comprises:

and a third light emitting diode element electrically connected to the third pad, wherein the first light emitting diode element and the third light emitting diode element have a distance in the second direction, the third light emitting diode element has a width in the second direction, and the ratio of the distance to the width is between 0.8 and 2.

16. The display device according to claim 1, wherein the first pads of the first pixel units are arranged along the first direction at a fifth distance, the second pads of the second pixel units are arranged along the first direction at a sixth distance, the first led device and the second led device emit light with the same color, and the fifth distance is equal to the sixth distance.