TWI641151B - A display device - Google Patents

Abstract

A display device includes: a first substrate, a second substrate, and a display molecular layer disposed between the first substrate and the second substrate; a display region of the first substrate is provided with a plurality of thin film transistors; a plurality of gates The polar wires are electrically connected to the control terminal of the thin film transistor, respectively; a plurality of data terminals are located in the peripheral area, and are electrically connected to the first terminal of the thin film transistor, respectively; a plurality of virtual terminals are located in the peripheral area, Each of the thin film transistors is electrically insulated from each other; wherein the data terminals and the dummy terminals are staggered along a first direction.

Description

Display device

The present invention relates to the field of display design, in particular to the design of test pads (Array Test Pads) in displays and a display device using the test pads.

TFT-LCD (Thin Film Transistor Liquid Crystal Display) is a common display. TFT-LCD belongs to active matrix liquid crystal display. The liquid crystal pixels on TFT-LCD are driven by thin film transistors. By means of active switching, independent and precise control of each pixel is achieved, so that high-speed, high-brightness, high-contrast display screen information can be achieved, and fine display effects can be achieved.

The structure of a TFT-LCD mainly includes a CF substrate, a TFT substrate, and a liquid crystal material. In the production process of a TFT-LCD panel, it is an important step to check the electrical characteristics of the TFT substrate. The prior art usually uses an Array Tester to use a fixture contact test terminal (Array Test Pad, AT Pad for short) to write test signals to pixels in a TFT substrate and read electrical signals for detection and analysis.

However, different TFT-LCD products have different resolutions, such as HD720, Full HD, etc. To check the electrical characteristics of products with different resolutions, different fixtures need to be replaced, resulting in the following problems: 1. Each time you change a product with a different resolution, it takes 1 to 2 hours to change and confirm the fixture, which results in a reduction in production capacity. 2. Each product with a different resolution requires 4 to 8 fixtures. There will be a lot of tools, leading to an increase in costs; 3. It takes 1 to 2 months to make a fixture suitable for a resolution, and the new product stage may not be detected in time to confirm the yield status.

An embodiment of the present invention relates to a display device including: a first substrate including an adjacent display area and a peripheral area; a second substrate including a plurality of color filter structures, and the color filter structure corresponds to A display molecular layer is provided between the first substrate and the second substrate; a plurality of thin film transistors are provided in the display area, and the thin film transistors each include a first Terminal, the second terminal and the control terminal; a plurality of gate lines are electrically connected to the control terminal of the thin film transistor, respectively; a plurality of data terminals are located in the peripheral area and are respectively connected to the thin film transistor. The first terminal is electrically connected; a plurality of virtual terminals are located in the peripheral area and are electrically insulated from each of the thin film transistors; wherein the data terminals and the virtual terminals are staggered along the first direction .

In the display device according to the embodiment of the present invention, an input test signal is written into the thin film transistor and the output test signal is read through the data terminal to perform detection analysis on the display device.

According to the display device according to the embodiment of the present invention, the number of the data terminals and the virtual terminals is the same, and there is one virtual terminal between the two adjacent data terminals, and two adjacent two of the data terminals. There are between the virtual terminals One said data terminal.

According to the display device of the embodiment of the present invention, when the number of the virtual terminals is n times the number of the data terminals, there are n virtual terminals between the two adjacent data terminals, where n is a positive integer.

In the display device according to the embodiment of the present invention, when the number of the data terminals is m times the number of the virtual terminals, there are m data terminals between the two adjacent virtual terminals, Where m is a positive integer.

According to the display device of the present invention, when the number of the data terminals is M and the number of the virtual terminals is N, and M = K‧m, N = K‧n, the data is m The terminals and n virtual terminals are repeatedly arranged in sequence, where M, N, m, n, and K are positive integers.

An embodiment of the present invention also relates to a display device, including: a first substrate including an adjacent display area and a peripheral area; a second substrate including a plurality of color filter structures, and the color filter structure corresponds to A display molecular layer is provided between the first substrate and the second substrate; a plurality of thin film transistors are provided in the display area, and the thin film transistors each include a first One end, the second end and the control end; a plurality of gate lines are electrically connected to the control end of the thin film transistor; a plurality of data terminals are located in the peripheral area and are respectively connected to the thin film transistor The first terminal is electrically connected, wherein a distance between two adjacent data terminals is larger than a width of the data terminals.

In the display device according to the embodiment of the present invention, each pitch between two adjacent data terminals is the same.

In the display device according to the embodiment of the present invention, a distance between two adjacent data terminals may be different.

The display device according to the embodiment of the present invention further includes a plurality of gate terminals, each of which is electrically connected to the gate line, wherein a distance between two adjacent gate terminals is d, The distance between adjacent data terminals is D, and the width of the data terminals is W, and D W + 2d.

100‧‧‧ display device

10‧‧‧Test terminal

111‧‧‧data terminal

112‧‧‧Virtual Terminal

113‧‧‧Gate terminal

114‧‧‧ thin film transistor

115‧‧‧ Conversion circuit

116‧‧‧pixels

117‧‧‧ Blank area corresponding to virtual terminal

118‧‧‧Drive circuit

A1‧‧‧display area

A2‧‧‧Peripheral area

G1 ~ GN‧‧‧Gate line

D1 ~ DM‧‧‧Data cable

D1‧‧‧ Test terminal arrangement direction

d‧‧‧Distance between adjacent gate terminals

W‧‧‧Data terminal width

D, Dm, Dn‧‧‧Distance between adjacent data terminals

In order to make the above and other objects, features, functions, and embodiments of the present invention more comprehensible, the description of the drawings is as follows: FIG. 1 is a schematic top view of a display device according to the prior art.

FIG. 2 is a schematic diagram according to the first embodiment of the present invention.

FIG. 3 is a schematic diagram according to a second embodiment of the present invention.

FIG. 4 is a schematic diagram according to a third embodiment of the present invention.

5A and 5B are schematic diagrams according to a fourth embodiment of the present invention.

6A and 6B are schematic diagrams according to a fifth embodiment of the present invention.

In order to make the foregoing objects, features, and effects of the present invention more comprehensible, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Numerous specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways than described herein. Those skilled in the art can make similar improvements without violating the meaning of the present invention. Therefore, the present invention is not subject to the specific embodiments disclosed below. limits.

See Figure 1. FIG. 1 is a schematic top view of a display device according to the prior art. As shown in FIG. 1, a display device 100 has a structure mainly It includes a first substrate (such as a TFT substrate), a second substrate (such as a CF substrate), and a display molecule layer (such as a liquid crystal molecule). The display device 100 can be divided into a display area A1 and a peripheral area A2. The second substrate includes a color filter structure and a light shielding structure, and the color filter structure is provided corresponding to the display area A1. The display device 100 is provided with a plurality of gate lines G1 to GN, a plurality of data lines D1 to DM, and a plurality of thin film transistors 114, and a control end of each thin film transistor 114 is electrically connected to a corresponding gate line, and An input terminal of each thin film transistor 114 is electrically connected to a corresponding data line. When the display device 100 is a color display, each pixel 116 may include at least three colors. As shown in FIG. 1, each pixel 116 has three colors R, G, and B, and each corresponds to a thin film transistor 114.

Specifically, the peripheral area A2 of the display device 100 includes a plurality of data terminals 111 and a gate terminal 113, and each data terminal 111 is electrically connected to the thin film transistor 114 in the display area A1. When performing the electrical test, the array terminal (Array Tester) is used to electrically contact the data terminal 111 (the data terminal is also a test terminal, that is, all the test terminals 10 are electrically connected to the thin film transistor 114). , Further write a test signal into the thin film transistor 114 (ie, the pixel 116 in the display area) for detection and analysis. When an image is displayed, it is input to the thin film transistor 114 through the data terminal 111, so that each pixel is displayed. In FIG. 1, the display device 100 further includes a conversion circuit 115, and the test terminal 10 can input a signal to each pixel 116 through the conversion circuit 115. Similarly, each gate terminal 113 is electrically connected to the thin film transistor 114 in the display area A1, and is used to input a test signal or a display driving signal to each pixel 116. For example, the gate terminal 113 inputs a signal to each pixel 116 through the driving circuit 118.

However, display devices at different resolutions have different numbers of images. Furthermore, display devices with different resolutions have different numbers of data terminals 111. Therefore, when testing, different resolution display devices must use different test fixtures. For example, a high-resolution display device is provided with 180 data terminals, and corresponding test fixtures must have 180 test terminals, so that each data terminal can obtain a corresponding test signal. Similarly, a low-resolution display device is provided with 72 data terminals, and the corresponding test fixture must be 72 test terminals. In this way, display devices with different resolutions must have corresponding test fixtures, and the mobility, convenience, and performance of the test process will decline significantly.

An embodiment of the present invention provides a test terminal sharing the same test fixture. The test terminal 10 includes a data terminal 111 and a virtual terminal 112. The data terminal 111 is electrically connected to the thin film transistor 114 of the display area A1, so that the data terminal 111 writes an input test signal to the thin film transistor 114 to perform detection analysis on the display device. At the same time, when the display device is to display an image, the display data of each pixel is also input to the thin film transistor 114 through the data terminal 111, so that each pixel is displayed. In the embodiment of the present invention, the test terminal 10 further includes a dummy terminal 112, and the dummy terminal 112 is electrically insulated from the thin film transistor 114 of the display area A1. In this way, the number of the test terminals 10 can flexibly increase the number of the virtual terminals 112 in addition to the number of the data terminals 111 previously included.

Since the number of data terminals corresponding to display devices with different resolutions is not the same, in the embodiment of the present invention, a specific number of virtual terminals 112 are provided to match, so that the number of test terminals 10 between display devices with different resolutions is all the same. In this way, display devices of different resolutions can share the same test fixture, that is, when the number of test terminals 10 of each display device is the same, When the pad pitch is the same, the same test fixture can be used to achieve the effect of sharing the fixture. For example, for the setting of the number of test terminals for display devices with different resolutions, see Table 1.

See Figure 2. FIG. 2 is a schematic diagram according to the first embodiment of the present invention. As shown in FIG. 2, in this embodiment, the number of the data terminals 111 and the virtual terminals 112 is the same, and the data terminals 111 and the virtual terminals 112 are staggered along the first direction (D1 direction), respectively. Specifically, in this embodiment, the data terminals 111 and the virtual terminals 112 may be staggered along the first direction D1 (from left to right in the figure) according to a one-to-one ratio. Looking at the embodiment of FIG. 2, the first direction D1 is substantially parallel to the extending direction of the gate line, but the invention is not limited thereto. In other words, there is only one virtual terminal 112 between two adjacent data terminals 111, and there is only one data terminal 111 between two adjacent virtual terminals 112. Corresponding to Table 1, in the display device B, the number of data terminals is 90 and the number of virtual terminals is 90. When the display device B is applied to the embodiment shown in FIG. 2, one data terminal 111 and one virtual terminal 112 are used as a group and are repeatedly arranged along the first direction D1. In this way, the display device B has 180 test terminals 10, including 90 data terminals 111 and 90 virtual terminals 112, so that the test fixture can be shared with other display devices.

See Figure 3. FIG. 3 is a drawing according to a second embodiment of the present invention The schematic. As shown in FIG. 3, in this embodiment, the number of the data terminals 111 and the virtual terminals 112 is a multiple of each other. In other words, the number of the data terminals 111 is M, and the number of the virtual terminals 112 is N. When the number of terminals 112 is n times the number of data terminals 111, that is, N: M = n. As shown in FIG. 4, the data terminals 111 and the virtual terminals 112 are also staggered along the D1 direction. Specifically, there are n virtual terminals 112 between two adjacent data terminals 111. For example, when there are 60 data terminals 111 and 120 virtual terminals 112, then N: M = 120: 60 = 2, that is, n = 2. Therefore, there are two virtual terminals 112 between two adjacent data terminals 111. Similarly, when the number of the data terminals 111 and the virtual terminals 112 is a multiple of each other, the number of the data terminals 111 is m times the number of the virtual terminals 112, that is, M: N = m, two adjacent virtual terminals. There are m said data terminals 111 between 112. For example, if there are 120 data terminals 111 and 60 virtual terminals 112, then M: N = 120: 60 = 2, that is, m = 2. Therefore, there are two data terminals between two adjacent virtual terminals 112.

See Figure 4. FIG. 4 is a schematic diagram according to a third embodiment of the present invention. As shown in FIG. 4, this embodiment continues the second embodiment, and the data terminals 111 and the virtual terminals 112 are staggered along the first direction D1, respectively. In this embodiment, the number of the data terminals 111 is M, and the number of the virtual terminals 112 is N, that is, M: N = m: n, then the arrangement order is to arrange the m data terminals 111 in succession and then arrange the n virtual terminals in succession. Terminal 112. In other words, the test terminal 10 may be a combination of a plurality of data terminals 111 and n virtual terminals 112 arranged repeatedly along the D1 direction. For example, when m = 2 and n = 3, as shown in FIG. 5, the arrangement order is a combination of 2 data terminals 111 and 3 virtual terminals 112, and the adjacent ones are another of the same arrangement. Combination (2 data terminals 111 and 3 virtual terminals 112). Corresponding to Table 1, in display device A, the number of data terminals 111 The number is 72, and the number of virtual terminals 112 is 108. When the display device A is applied to the embodiment shown in FIG. 4, the two data terminals 111 and the three virtual terminals 112 may be arranged in a group repeatedly along the first direction D1. In this way, the display device A has 180 test terminals 10, and the test fixture can be shared with other display devices.

In the embodiment in which the data terminals 111 and the virtual terminals 112 are staggered along the first direction D1, as shown in FIG. 2 to FIG. 4, the data terminals 111 are uniformly and repeatedly arranged in groups, so that the data terminals 111 are evenly dispersed. In this way, the length and width of the fanout can be reduced, which is suitable for display devices with narrow bezels (small peripheral area).

Please refer to FIG. 5A and FIG. 5B. 5A and 5B are schematic diagrams according to a fourth embodiment of the present invention. As shown in FIG. 5A, in the embodiment shown in FIG. 5A, the third embodiment is continued. The data terminal 111 and the virtual terminal 112 are respectively arranged along the first direction D1. The difference between this embodiment and the third embodiment is that All data terminals 111 are continuously arranged, that is, virtual terminals 112 are no longer arranged between adjacent data terminals 111. Similarly, all the virtual terminals 112 are arranged continuously, that is, there is no data terminal 111 between adjacent virtual terminals 112. Specifically, as shown in FIG. 5A, all the data terminals 111 are continuously arranged and located at the left position, and all the virtual terminals 112 are also continuously arranged at the right position. In another modification, all data terminals 111 may be located on the right side, and all virtual terminals 112 are located on the left side, which is not limited in the present invention.

See Figure 5B. The difference between the embodiment shown in FIG. 5B and the embodiment shown in FIG. 5A is that all the data terminals 111 are continuously arranged in the middle position, and the dummy terminals 112 are located on both sides. Similarly, for different needs, all the virtual terminals 112 can be continuously arranged in a centralized position, and the data terminals 111 are disposed at the opposite sides, which is not limited in the present invention.

Please refer to FIG. 6A and FIG. 6B. 6A and 6B are schematic diagrams according to a fifth embodiment of the present invention. As shown in FIG. 6A, the test terminal 10 includes only the data terminal 111, and the data terminals are arranged along the D1 direction. A plurality of gate terminals 113 are also provided in the peripheral area. The difference between this implementation and the above embodiment is that the position of the virtual terminal 112 is set as a blank area 117, that is, the virtual terminal 112 is not provided. In this way, the distance between two adjacent data terminals 111 is D, and the width of the data terminals 111 is W, the distance D will be greater than the width W, so that the space of the distance D can accommodate the blank area 117 (corresponding to the above implementation) Example of virtual terminal 112). For example, when the test fixture of Table 1 (180 test terminals) is shared with the display device of this embodiment, although the number of data terminals 111 of the display device is less than 180, some test terminals of the test fixture system do not correspond. The data terminal 111 in this embodiment corresponds to the blank area 117 in this embodiment. In this way, display devices with different resolutions can also achieve the effect of the test fixture.

In the embodiment of FIG. 6A, the distance D between the two adjacent data terminals 111 of each group is the same, so that the data terminals 111 are evenly distributed and arranged along the first direction D1. In order to achieve a common test fixture, the distance D must be greater than the width W. Specifically, it can be understood from FIG. 6A that the distance between two adjacent gate terminals 113 is d. In the prior art, the distance D between the data terminals 111 and the distance d between the gate terminals 113 are the same. In this embodiment, the distance D between the data terminals 111 is widened from the original distance d, so that there is enough space between two adjacent data terminals 111 to accommodate the blank area 117, which can further correspond to the test fixture. Part of the test terminal. Therefore, the distance D satisfies the distance d.

In the embodiment of FIG. 6B, the intervals between some two adjacent data terminals 111 are not equal to each other, that is, the data terminals 111 are unevenly distributed. In detail, as shown in FIG. 6B, the pitch of some adjacent data terminals 111 is Dm, and the distance between two adjacent data terminals 111 in the other part is Dn, and the distance Dm is different from the distance Dn. In this embodiment, the distance Dm still needs to satisfy the width W of the data terminal 111, and at the same time, the distance Dn also needs to conform to the width W of the data terminal 111. In this way, display devices that can use different resolutions can share test fixtures.

In yet another embodiment, please refer to FIG. 6A again. When the distance D is W + 2d, the data terminals 111 and the blank area 117 are staggered along the first direction D1, respectively, and the advantage of a shared test fixture can be achieved. In the embodiment in which the position of the virtual terminal 112 is set as a blank area 117, it is equivalent to increasing the distance between two adjacent data terminals 111, and there is only a blank area between the data terminals 111, thereby reducing the detection process. Electrostatic Disturbance (ESD).

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims (10)

A display device includes: a first substrate including an adjacent display area and a peripheral area; a second substrate including a plurality of color filter structures, and the color filter structures are provided corresponding to the display area; A display molecular layer is disposed between the first substrate and the second substrate; a plurality of thin film transistors are disposed in the display area, and the thin film transistors each include a first end, a second end, and a A control terminal; a plurality of gate lines are electrically connected to the control terminals of the thin film transistors; a plurality of data terminals are located in the peripheral area and are electrically connected to the first terminals of the thin film transistors; And a plurality of virtual terminals are located in the peripheral area and are electrically insulated from each of the thin film transistors; wherein the data terminals and the virtual terminals are staggered along a first direction. For example, the display device of claim 1, wherein the input test signals are written into the thin film transistors and the output test signals are read through the data terminals, so as to detect and analyze the display device. For example, the display device of claim 1, wherein the number of data terminals and the number of virtual terminals are the same, and the number of virtual terminals is provided between the two adjacent data terminals, and the number of adjacent virtual terminals is These data terminals are provided in between. For example, the display device of claim 1, wherein the number of the virtual terminals is n times the number of the data terminals, and there are n virtual terminals between the two adjacent data terminals, where n Is a positive integer. For example, the display device of claim 1, wherein the number of the data terminals is m times the number of the virtual terminals, and there are m data terminals between the two adjacent virtual terminals, where m Is a positive integer. For example, the display device of claim 1, wherein the number of the data terminals is M and the number of the virtual terminals is N, where M = K‧m, N = K‧n, and m data terminals and The n virtual terminals are repeatedly arranged in sequence, where M, N, m, n, and K are positive integers. A display device includes: a first substrate including an adjacent display area and a peripheral area; a second substrate including a plurality of color filter structures, and the color filter structures are provided corresponding to the display area A display molecular layer disposed between the first substrate and the second substrate; a plurality of thin film transistors are disposed in the display area, and the thin film transistors each include a first terminal, a second terminal, and a control terminal; ; A plurality of gate lines are electrically connected to the control terminals of the thin film transistors; and a plurality of data terminals are located in the peripheral area and are electrically connected to the first terminals of the thin film transistors, respectively, wherein The distance between two adjacent data terminals is larger than the width of each data terminal. The display device according to claim 7, wherein each of the distances between the two adjacent data terminals is the same. The display device as claimed in claim 7, wherein the distances between the two adjacent data terminals are different. For example, the display device of claim 7, further comprising a plurality of gate terminals, each of which is electrically connected to each of the gate lines, wherein a distance between two adjacent gate terminals is d, and the two The distance between adjacent data terminals is D, and the width of each data terminal is W, and D W + 2d.