CN110515248B

CN110515248B - Display device

Info

Publication number: CN110515248B
Application number: CN201910790064.9A
Authority: CN
Inventors: 陈培杰; 陈宏昆; 王宗裕; 林映彤
Original assignee: Innolux Display Corp
Current assignee: Innolux Corp
Priority date: 2015-10-16
Filing date: 2015-10-16
Publication date: 2022-12-13
Anticipated expiration: 2035-10-16
Also published as: CN106597766A; CN110515248A; CN106597766B

Abstract

The invention discloses a display device, comprising: the substrate is provided with a display area and a peripheral area which are adjacent; a plurality of sub-pixels arranged in the display area; a plurality of data lines electrically connected to the plurality of sub-pixels; a first electronic element group and a second electronic element group are arranged on the peripheral area, are electrically connected with the data lines and comprise a plurality of first electronic elements and a plurality of second electronic elements. The adjacent first electronic elements have a first pitch, the adjacent second electronic elements have a second pitch, and the first pitch is not equal to the second pitch.

Description

Display device

The application is a divisional application of Chinese invention patent application (application number: 201510673023.3, application date: 2015, 10, month and 16, title of the invention: display device).

Technical Field

The present invention relates to a display device, and more particularly, to a display device in which peripheral electronic elements and layout of the display device are optimized.

Background

Display devices, such as liquid crystal display devices, organic light emitting diode display devices, electroluminescence display devices, field emission display devices, and the like, have been widely used in recent years in various electronic apparatuses because of their advantages of being light, thin, and small in size. The pixel area of the display device is usually rectangular, but the display area is not rectangular in design in response to the electronic equipment.

In order to prevent electrostatic discharge (ESD) from damaging the pixel cells and other circuits of the display device, electronic devices, such as ESD protection devices, are usually added to the peripheral area of the display device to enhance the anti-ESD capability of the display device. Since various traces are disposed in the peripheral region of the display device, the layout and functions of the electronic components are affected.

Disclosure of Invention

The present invention is directed to a display device with optimized peripheral electronic components and layout of the display device, so as to solve the above problems.

According to a feature of the display device of the present invention, the display device includes: a substrate having a display region and a peripheral region adjacent to each other; a plurality of sub-pixels arranged in the display region; a plurality of data lines electrically connected to the plurality of sub-pixels; a first electronic element group which is arranged on the peripheral area, is electrically connected with part of the data lines and comprises a plurality of first electronic elements; and a second electronic element group which is arranged in the peripheral area, is electrically connected with part of the data lines and comprises a plurality of second electronic elements. A first interval is arranged between the adjacent first electronic elements, a second interval is arranged between the adjacent second electronic elements, and the first interval is not equal to the second interval.

According to another feature of the display device of the present invention, the second pitch is smaller than the first pitch.

According to another feature of the display device of the present invention, each of the plurality of electronic elements is further electrically connected to the corresponding plurality of lines through a connecting portion; the display device also comprises a common line which is connected with the plurality of electronic elements; wherein, the common line has a first bending part, and the first group and the second group are connected through the first bending part; and the length of the connecting part corresponding to each electronic element in the second group is in direct proportion to the distance between the connecting part and the first bending part.

According to another feature of the display device of the present invention, the plurality of first electronic elements and the plurality of second electronic elements are arranged in a row along a first direction, and an extension line of the plurality of first electronic elements along the first direction and an extension line of the plurality of second electronic elements along the first direction do not overlap in the first direction.

According to another feature of the display device of the present invention, the substrate further has a metal layer and a wiring layer; wherein the metal layer has a first boundary, and the routing layer has a second boundary; in the first direction, a third distance and a fourth distance are arranged between the first boundary and the second boundary, and the third distance is not equal to the fourth distance. In addition, the metal layer is arranged between the routing layer and the peripheral area.

According to still another feature of the display device of the present invention, the display area may be non-rectangular, and includes a rectangular area and a non-rectangular area, and the number of sub-pixels of the sub-pixel rows disposed in the rectangular area is greater than the number of sub-pixels of the sub-pixel rows disposed in the non-rectangular area. The second group is connected with the lines corresponding to the rectangular area, the first group is connected with the lines corresponding to the non-rectangular area, and the second spacing is smaller than the first spacing.

According to still another feature of the display device of the present invention, the plurality of electronic elements are esd protection elements; in addition, the electrostatic discharge protection element comprises two diodes which are connected in reverse parallel.

Drawings

Fig. 1 is a schematic circuit diagram of a display device according to an embodiment of the invention;

fig. 2 is a partial circuit diagram of the display device 1 corresponding to fig. 1;

fig. 3 is a partially enlarged view of the vicinity of the first electronic component group 17 and the second electronic component group 18 of fig. 2;

FIGS. 4A and 4B are enlarged partial views of the circuitry of FIG. 3 in the vicinity of the second group of electronic components 18;

fig. 5 is a partially enlarged view of a circuit near the second electronic component group 18 of fig. 3.

Description of the symbols

1-display device

10 to substrate

11-display area

11A-first zone

11B to the second region

12 peripheral area

13-scanning line

13' -scan connecting line

14-data line

14a first data line

14b to second data line

15-gate drive unit

16-data drive unit

17-first electronic component group

18 to the second electronic component group

18 a-first type second electronic component group

18 b-second type second electronic component group

21 electronic component

21a first electronic component

21b to second electronic component

23-common line

23 to the first bending part

25-routing layer

27-metal layer

SP-sub-pixel

d1 to the first distance

d2 to the second pitch

d3 to third distance

d4 to fourth spacing

a. b, c, d-bending line

B1-first boundary

B2 to second boundary

Path1-path 6-ESD current path

LT-connecting part

Xc-capacitance

Detailed Description

Fig. 1 shows a schematic diagram of a circuit architecture of a non-rectangular display device 1. The non-rectangular display device 1 of fig. 1 comprises: a substrate 10, a non-rectangular display area 11 and a peripheral area 12 disposed on the substrate 10, wherein the non-rectangular display area 11 has a plurality of sub-pixels SP (sub-pixels). The edge profile of the substrate 10 may be irregular such as rectangular, circular, elliptical, square or other non-rectangular polygonal shapes 8230A, and may have edge chamfered designs. The substrate 10 may be made of glass, silicon, plastic or other polymer materials. The non-rectangular display area 11 has a first area 11A and a second area 11B. The first region 11A is designed like a display region of a general display device, and the sub-pixels SP in the region are arranged in a rectangular matrix, for example, the first region 11A is a rectangular sub-pixel array formed by M rows and N rows of sub-pixels SP, the array edge of the rectangular sub-pixel array is in an orthogonal linear shape and extends along the X and Y directions, wherein M and N are positive integers. The second region 11B is designed to be non-rectangular, so that some of the edge sub-pixels SP are deleted, and some of the edge sub-pixels SP of the second region 11B are not connected in the X and Y directions and are arranged in an oblique direction. In this embodiment, the non-rectangular display area 11 includes a first area 11A and two second areas 11B. In other embodiments, the non-rectangular pixel region 11 may include at least one first region 11A and at least one second region 11B, and is not limited thereto. The peripheral area 12 is adjacent to and surrounds the non-rectangular display area 11, and the peripheral area 12 is used for disposing a driving device, a connecting line, a testing element or a protection element 8230for driving the sub-pixels SP in the non-rectangular display area 11, and other circuit layouts. Due to the trend of narrow bezel design, the space in the peripheral region 12 limits the design freedom of each circuit element.

The non-rectangular display region 11 has a plurality of scanning lines 13 arranged in the X direction and data lines 14 arranged in the Y direction. The scanning lines 13 are orthogonal to the data lines 14, and each of the sub-pixels SP has a plurality of switches at an intersection thereof. The plurality of data lines 14 include a first data line 14a located in the first region 11A and a second data line 14B located in the second region 11B, in this embodiment, the length of the first data line 14a is longer than that of the second data line 14B, and the number of sub-pixels SP connected to the first data line 14a is greater than that of the sub-pixels SP connected to the second data line 14B. The sub-pixel SP has a switch and a pixel electrode, the switch may be a thin film transistor, and an active layer of the thin film transistor may be polycrystalline silicon (a-Si), amorphous silicon (poly-Si), or Indium Gallium Zinc Oxide (IGZO). The material of the scan lines 13 and the data lines 14 may be copper, aluminum, magnesium, molybdenum, titanium, chromium, manganese, silver, or other single-layer or multi-layer structures.

The gate driving unit 15 and the data driving unit 16 are disposed in the peripheral region 12 and electrically connected to the plurality of scan lines 13 and the plurality of data lines 14. In the present embodiment, the gate driving unit 15 and the data driving unit 16 are disposed on the same side of the peripheral region 12, and in other embodiments, the gate driving unit 15 and the data driving unit 16 may also be disposed on different sides of the peripheral region 12. In the present embodiment, two gate driving units 15 are correspondingly disposed on two sides of the non-rectangular display area 11, and are electrically connected to the odd-numbered scan lines 13 and the even-numbered scan lines 13 respectively through two side scan connection lines 13', so as to provide gate scan signals for the sub-pixel SP switches. In other embodiments, there may be only a single gate driving unit 15, and all the scan lines 13 are electrically connected from a single side by the plurality of scan connection lines 13'. The data driving unit 16 is electrically connected to the data lines 14, and provides data signals to the pixel electrodes in the sub-pixels SP.

At least one first electronic component group 17 and a plurality of second electronic component groups 18 are disposed on the peripheral region 12. The first electronic component group 17 is electrically connected to the end of the first data line 14a of the first region 11a, and the second electronic component group 18 is electrically connected to the end of the second data line 14b of the second region 11b. In this embodiment, the display device 1 includes a first electronic component group 17, and the plurality of second electronic component groups 18 are divided into a first type second electronic component group 18a and a second type second electronic component group 18b, wherein the number of electronic components in the first electronic component group 17, the number of corresponding data lines 14 and the occupied area are larger than those of the first type second electronic component group 18a, and the number of electronic components in the first type second electronic component group 18a, the number of corresponding data lines 14 and the occupied area are larger than those of the second type second electronic component group 18b. In other embodiments, the display device 1 may include a plurality of first electronic component groups 17, and the number of electronic components, the number of corresponding data lines 14 and the occupied area in the first electronic component group 17 are smaller than those in the first type second electronic component group 18a, and the number of electronic components, the number of corresponding data lines 14 and the occupied area in the first type second electronic component group 18a are larger than those in the second type second electronic component group 18b.

Fig. 2 shows a partial view 2 of the display device 1 corresponding to fig. 1. The first electronic component group 17 includes a plurality of first electronic components 21a, which are electrically connected to the corresponding first data lines 14a and located at the ends thereof, respectively. The second electronic component group 18 includes a plurality of second electronic components 21b, which are electrically connected to the corresponding second data lines 14b and located at the ends thereof, and the arrangement direction thereof is the same as the extending direction X of the scan lines 13. In this embodiment, the first type second electronic component group 18a has six second electronic components 21b, and the second type second electronic component group 18b has three second electronic components 21b. In other embodiments, the number of the second electronic elements 21b included in the first type second electronic element group 18a and the second type second electronic element group 18b can be any positive integer, and the number is related to the sub-pixel SP and the second data line 14b. The arrangement extending direction (X direction) of the first electronic elements 21a and the arrangement extending direction (X direction) of the second electronic elements 21b have a pitch in the extending direction (Y direction) of the data lines 14, that is, the long axis extending direction of the first electronic element group 17 and the long axis extending direction of the second electronic element group 18 are not overlapped and are arranged in a staggered manner.

In the above-described embodiment, the first electronic component 21 and the second electronic component 21b are electrostatic discharge protection elements. For example, the diode may be composed of at least two diodes connected in anti-parallel, but the present invention is not limited thereto.

Adjacent first electronic components 21a in the first electronic component group 17 have a first spacing d1 (along the X direction), adjacent second electronic components 21b in the second electronic component group 18 have a second spacing d2 (along the X direction), and the first spacing d1 is not equal to the second spacing d2. In this embodiment, the first distance d1 is greater than the second distance d2. The first distance d1 is a distance between two adjacent edges of the adjacent first electronic components 21a, and the second distance d2 is a distance between two adjacent edges of the adjacent second electronic components 21b.

The peripheral region 12 of fig. 2 further includes a common line 23, a routing layer 25 and a metal layer 27; the routing layer 25 may include, but is not limited to, a test line or other signal connection lines. The metal layer 27 may be a common plane (common plane) or a ground plane (ground plane), but is not limited thereto. As shown in fig. 2, a portion of the routing layer 25 has a first boundary B1, and a portion of the metal layer 27 has a second boundary B2; in the X direction, there are at least a third distance d3 and a fourth distance d4 between the first boundary B1 and the second boundary B2, and the third distance is not equal to the fourth distance. In this embodiment, the third spacing d3 is greater than the fourth spacing d4.

Fig. 3 is a partially enlarged view of the vicinity of the first electronic component group 17 and the second electronic component group 18 in fig. 2. All electronic components 21 of the display device 1 are connected to a common line 23. As shown in fig. 3, the common line 23 has a first bending portion 23a, and the first electronic component group 17 and the second electronic component group 18 are connected by the first bending portion 23 a.

In addition, each of the plurality of second electronic elements 21b in the display device 1 can be electrically connected to the corresponding plurality of second data lines 14b through a connecting portion LT, which can be a straight line or a bent line. For example, the right 1 st to 4 th second electronic elements 21b in the second electronic element group 18a are connected to the second data lines 14b through the bending lines a to d in the connecting portion LT, respectively. Note that the lengths of the bending lines a to d are longer as the lengths are farther from the first bending portion 23 a.

Referring to fig. 2 and 3, in the peripheral area 12 corresponding to the second area 11B of the non-rectangular display area 11, since the common lines 23, the routing layers 25 and the metal layers 27 occupy a certain layout area after impedance calculation, the layout space reserved for the electronic elements 21 is small. Therefore, in the present invention, the second pitch d2 of the second electronic components 21B provided corresponding to the second region 11B is set to be smaller than the first pitch d1 of the first electronic components 21A provided corresponding to the first region 11A. In order to cope with the reduction of the pitch, the connection between the electronic element 21 corresponding to the second region 11B, such as the second electronic element 21a in the second electronic element group 18B, and the second data line 14B is required to have the bending lines a-d in the connection portion LT shown in fig. 3. Based on the above, the invention can optimize the layout, so that the layout design is more flexible.

Fig. 4A and 4B are enlarged partial views of the circuit near the second electronic device group 18 of fig. 3 to illustrate the electrical behavior of the electronic device 21 for electrostatic discharge (ESD) according to the present invention.

Referring to fig. 4A, when an ESD event occurs at the bend line b, an ESD current may flow to the paths path1 and path2, and if a majority of the ESD current flows to the path1, internal elements (such as a thin film transistor, other display elements, etc.) of the sub-pixel SP connected to the data line 14 in the display region 11 may be damaged. Since the second distance d2 between the second electronic elements 21b in the first type and the second type second

electronic element groups

18a and 18b is smaller than the first distance d1, the capacitance Xc between the second electronic elements 21b in the second electronic element group 18 becomes larger, so that the electrical coupling effect is stronger, and for the electrostatic discharge belonging to the high frequency ac type, it is equivalent to increase the width of the path 2. Therefore, the esd current is shunted to the path2 (as shown in fig. 4B) due to the jump characteristic of esd, thereby reducing the esd current flowing to the path 1.

Fig. 5 is a partial enlarged view of a circuit near the second group 18 of electronic components of fig. 3, illustrating the electrical behavior of the electronic components 21 with respect to electrostatic discharge (ESD) according to the present invention.

Referring to fig. 5, consider the case when electrostatic discharge occurs outside the display area 11 (e.g., at the bent portion 23a of the common line 23). Since the impedance is proportional to the line length and the current is inversely proportional to the impedance, the larger the difference in impedance between the paths path1 to path6 is, the larger the difference in the distribution ratio of the current becomes. The excessive current may cause the electronic element 21b (e.g. diode) of the path1 to break down and turn on, and the current entering the path1 may destroy the internal elements (e.g. thin film transistor, or other display elements) of the sub-pixel SP connected to the data line 14b. Therefore, the second distance d2 between the second electronic components 21b in the second type second electronic component group 18b is smaller than the first distance d1, so that the second electronic components 21b in the second type second electronic component group 18b are as close as possible, the electrostatic discharge current can be more evenly distributed in the second electronic components 21b on each path1-path6, and the possibility of damage is reduced.

Claims

1. A display device, characterized in that the display device comprises:

the display device comprises a substrate, a first substrate and a second substrate, wherein the substrate is provided with a non-rectangular display area and a peripheral area which are adjacent, the non-rectangular display area is provided with a first area and a second area, the first area is rectangular, and the second area is non-rectangular;

a plurality of data lines in the non-rectangular display region, including a plurality of first data lines in the first region and a plurality of second data lines in the second region;

a plurality of first electronic elements arranged in the peripheral area and electrically connected with the plurality of first data lines; and

a plurality of second electronic elements arranged in the peripheral area and electrically connected with the plurality of second data lines;

wherein the plurality of first electronic elements and the plurality of second electronic elements are electrostatic protection elements;

wherein, a first interval is arranged between the adjacent first electronic elements in a direction, a second interval is arranged between the adjacent second electronic elements in the direction, and the second interval is smaller than the first interval;

wherein a length of at least one of the plurality of first data lines in the first region is greater than a length of at least one of the plurality of second data lines in the second region.

2. The display device of claim 1, wherein the substrate edge of the second region has an arcuate edge.

3. The display device according to claim 1, further comprising a plurality of second electronic component groups electrically connected to the plurality of second data lines, the plurality of second electronic component groups including the plurality of second electronic components and being divided into a first type group and a second type group, wherein a number of the plurality of second data lines electrically connected to the first type group is greater than a number of the plurality of second data lines electrically connected to the second type group.

4. The display device of claim 1, further comprising a first meander line electrically connected to one of the plurality of second data lines.

5. The display device according to claim 4, further comprising a second meander line electrically connecting another of the plurality of second data lines, wherein the second meander line is further from the first region than the first meander line.

6. The display device of claim 5, wherein the second bend line has a length greater than a length of the first bend line.

7. The display device according to claim 3, wherein the number of the first data lines is greater than the number of the second data lines electrically connecting the first type group.

8. The display device according to claim 1, further comprising a common line disposed at the peripheral region, wherein the common line has a bending portion electrically connected to the first electronic elements and the second electronic elements.

9. The display device according to claim 8, wherein the bent portion of the common line is located between an extension line of one of the plurality of first data lines and an extension line of one of the plurality of second data lines.

10. The display device of claim 1, further comprising a common line between the plurality of first electronic elements and an edge of the substrate.

11. The display device of claim 1, further comprising a common line between the plurality of second electronic elements and an edge of the substrate.