CN101221971A - Flat panel display and test method thereof - Google Patents

Abstract

A flat panel display comprises a substrate, a light emitting area, a plurality of scanning lines and data lines, wherein the light emitting area is formed on the substrate and is used as a screen picture, the scanning lines and the data lines extend mutually and vertically in the light emitting area respectively, a first lead area comprises a first lead connecting area, a first lead area and a plurality of first conductive gaskets, one end of the first lead connecting area in the first lead connecting area is electrically connected with the scanning lines, and the other end of the first lead connecting area is electrically connected with the first lead or the first conductive gaskets in the first lead area; the second lead area comprises a second lead connecting area, a second lead area and a second conductive gasket, wherein the second lead in the second lead connecting area is electrically connected with the data line, and the other end of the second lead is electrically connected with the second lead or the second conductive gasket in the second lead area.

Description

Flat-panel display and testing method for the flat-panel display

technical field

The invention relates to a display and a testing method of the display, in particular to a flat display and a testing method of the flat display.

Background technique

Referring to Fig. 1, during the testing process of the flat-panel display of the general organic electroluminescent diode, it needs to be electrically connected with two first conductive media 8 and a second conductive media 9, and the first voltage and the second voltage of the outside are introduced into respectively These conductive media 8, 9 are used for aging the flat panel display.

The flat panel display includes a substrate 7 and a protection unit (not shown) disposed above the substrate 7 . The substrate 7 can be transparent glass, plastic or elastomer material. The substrate 7 includes a light emitting region 71 formed on the substrate 7 and capable of displaying images, a plurality of data lines 72 disposed in the light emitting region 71, a plurality of scanning lines disposed in the light emitting region 71 and perpendicular to the data lines 72 73. A plurality of first conductive pads 7411, a plurality of second conductive pads 7412, two first wire regions 75 and a second wire arranged on one side of the light emitting region 71 and spaced apart from the light emitting region 71 Area 76, the first wire area 75 contains the first wire area 751, the first wire area 77 and a plurality of first conductive pads 7411, the second wire area 76 includes the second wire area 761, the second The guiding wire area 78 and the plurality of second conductive pads 7412 .

The light-emitting area 71 is used to display images. The protection unit covers the light-emitting area 71 of the substrate 7 to protect the light-emitting area 71 from being scratched. The material of the protection unit can be glass, plastic, elastomer or metal cover.

The first wire area 75 and the second wire area 76 are arranged outside the light-emitting area 71, and one end of the first wire of each first wire area 751 is electrically connected to the scanning line 73, and each first wire area 77 One end of the first lead wire is electrically connected to the first conductive pad 7411, and the other end of the first lead wire is electrically connected to the other end of the first lead wire. One end of the second lead wire of each second lead wire region 761 is electrically connected to the data line 72, and one end of the second lead wire of each second lead wire region 77 is electrically connected to the second conductive pad 7412. The other end of the wire is electrically connected to the other end of the second bonding wire.

During the test, the driver chip has not been electrically connected to the first conductive pad 7411 and the second conductive pad 7412 . The driver chip is generally electrically connected to the plurality of conductive pads 7411 and 7412 of the substrate in the manner of chip on glass (Chip On Glass, COG for short) or tape automated bonding (TAB for short). In the case of COG, a plurality of conductive pads 7411, 7412 are bonding pads, and are directly connected to the signal output end of the driver chip by anisotropic conductive film (ACF for short). electrical connection. In the case of TAB, these conductive pads 7411, 7412 are contact pads (FPC pads) electrically connected to a flexible printed circuit board (FlexiblePrinted Circuit board, referred to as FPC) (not shown), so these conductive pads The pads 7411, 7412 are indirectly electrically connected to the signal output end of the driving chip through the FPC. Each lead wire receives the driving signal output by the driving chip through one of the conductive pads 7411 , 7412 .

The test is to introduce the first conductive medium 8 and the second conductive medium 9 into the first voltage and the second voltage with a very large voltage difference at the same time, and simultaneously contact multiple wires in the first guide line area 77 respectively. A first guide line and a plurality of second guide lines in the second guide line area 78, the defect (defect) hidden by the flat panel display is made by the high voltage electric field between the first voltage and the second voltage can be inspected in detail.

However, the area of the substrate 7 other than the light-emitting region 71 is limited, and the wiring range of the first conductor region 75 and the second conductor region 76 on the substrate 7 has a certain area limitation, and the first conductive medium 8 and The distance dist of the second conductive medium 9 must at least be greater than 50 μm, generally 100 μm, and preferably 200 μm; so that the first conductive medium 8 and the second conductive medium 9 respectively contact a plurality of the first guide line regions 77 The first guiding line and the plurality of second guiding lines in the second guiding line area 78 will not be in contact with each other.

If the driving chip is bonded to the substrate 7 in the form of TAB, there must be a distance dist greater than 50 μm between the first conductive medium 8 and the second conductive medium 9, generally 100 μm, preferably 200 μm; The first conductive medium 8 and the second conductive medium 9 are respectively electrically connected to a plurality of first guiding wires and a plurality of second guiding wires at the same time, otherwise contact errors are likely to occur. Compared with flat panel displays with higher resolution, the number of guide lines in the first guide line area 77 and the second guide line area 78 must be increased, relatively making the first conductive medium 8 and the second guide line area The distance dist between the two conductive media 9 is reduced to increase the possibility of mutual contact, thus easily causing contact errors between the first conductive media 8 and the second conductive media 9 .

For the substrate 7 that is electrically connected to the driving chip in a COG manner, there must also be a distance dist greater than 50 μm between the first conductive medium 8 and the second conductive medium 9, generally 100 μm, preferably 200 μm; As long as there is the above distance dist, there will be no problem. If the resolution increases and the number of these first and second guide wires must increase, the distance dist between the first conductive medium 8 and the second conductive medium 9 must be If it is less than 200 μm, contact errors will occur between the first conductive medium 8 and the second conductive medium 9 .

Contents of the invention

Therefore, the object of the present invention is to provide a flat panel display that can increase the distance between the first conductive medium and the second conductive medium within a limited area.

Therefore, another object of the present invention is to provide a flat panel display testing method that can prevent the first conductive medium and the second conductive medium from touching each other.

Therefore, the flat panel display of the present invention includes a substrate and a protection unit.

The substrate includes a light-emitting area formed on the substrate and capable of displaying images. A plurality of scanning lines and a plurality of data lines are arranged in the light-emitting area. Signal input, wherein the scan line is electrically connected to the first wire area, and the data line is electrically connected to the second wire area.

The first wiring area includes a first wiring area, a first guiding line area and a plurality of first conductive pads. One end of the first wiring area is electrically connected to a plurality of scanning lines, and the other end is connected to the first guiding line area or the first wiring area. A conductive pad is electrically connected. The second wiring area includes a second wiring area, a second guiding line area and a plurality of second conductive pads. One end of the second wiring area is electrically connected to a plurality of data lines, and the other end is connected to the second guiding line area or the second wiring area. The two conductive pads are electrically connected.

The first and second guide line regions are respectively used to guide the first external voltage into the scan lines and the second voltage from the outside into the data lines.

The first and second conductive pads are electrically connected to an external driving signal source.

Wherein, when the connection order of the first wire area is the first wire connection area, the first conductive pad and the first guide wire area, the connection order of the second wire area is the second wire connection area, the second wire guide area and a second conductive pad.

When the connection sequence of the first wiring area is the first wiring area, the first wiring area and the first conductive pad, the connection sequence of the second wiring area is the second wiring area, the second conductive pad and the second wiring area. Guide line area.

During the test, the first conductive medium is respectively brought into contact with the first guide wire in the first guide wire area, and the second conductive medium is in contact with the second guide wire in the second guide wire area, and then the voltage is introduced. In the above method, no contact error will occur between the first conductive medium on the first guiding line area and the second conductive medium on the second guiding line area during testing.

Therefore, the testing method of the flat-panel display of the present invention uses the external first conductive medium and the second conductive medium to be connected with the plurality of first guide lines and the first guide line in the first guide line area of the above-mentioned flat-panel display respectively. A plurality of second guide lines in the two guide line areas are electrically connected, and the external first voltage and second voltage are respectively introduced into the first conductive medium and the second conductive medium at the same time to test the flat panel display.

Description of drawings

FIG. 1 is a schematic diagram illustrating a prior art flat panel display;

Fig. 2 is a schematic diagram illustrating the situation of the first preferred embodiment of the flat panel display of the present invention;

Fig. 3 is a schematic diagram similar to Fig. 2, illustrating the situation of the second preferred embodiment of the flat panel display of the present invention;

FIG. 4 is a schematic diagram similar to FIG. 2 , illustrating the first preferred embodiment of the flat panel display of the present invention comprising a plurality of conductive pads electrically connected to the flexible printed circuit board.

Explanation of reference signs

1 substrate 11 light-emitting area

12 Data Lines 13 Scanning Lines

1411 Multiple first conductive pads 1412 Multiple second conductive pads

15 The first wiring area 151 The first wiring area

16 The second wire area 161 The second wiring area

17 The first guide line area 18 The second guide line area

191 First insulation layer 192 Second insulation layer

dist distance 2 the first conductive medium

3 second conductive medium

Detailed ways

The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of two preferred embodiments with reference to the drawings.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Fig. 2, the first preferred embodiment of the flat panel display of the present invention can be electrically connected with two first conductive mediums 2 and a second conductive medium 3 of the outside world, and the first voltage and the second voltage of the outside world are respectively introduced into the first conductive medium 2 and a second conductive medium 3 to test the flat panel display, and the flat panel display includes a substrate 1 and a protection unit (not shown).

The substrate 1 includes a light emitting region 11 formed on the substrate 1 and capable of displaying images, a plurality of data lines 12 arranged in the light emitting region 11, a plurality of scanning lines arranged in the light emitting region 11 and perpendicular to the data lines 12 13. Two first wire areas 15, one second wire area 16, the first wire area 15 contains the first wire connection area 151, a plurality of first conductive pads 1411 and the first wire area 17; the second The wiring area 16 includes a second wiring area 161 , a plurality of second conductive pads 1412 and a second wiring area 18 ; a part of the first wiring area 151 covers the first insulating layer 191 . The first wire area 15 and the second wire area 16 are arranged outside the light-emitting area 11, and each first wire in the first wire area 151 is electrically connected to the scanning line 13, and each wire in the second wire area 161 is electrically connected to the scanning line 13. Each second bonding wire is electrically connected to the data line 12 .

The light emitting area 11 is used for displaying pictures. A plurality of first conductive pads 1411 and a plurality of second conductive pads 1412 are respectively used to be electrically connected to signal output terminals (not shown) of a driving chip (not shown), and the driving chip is connected via these conductive pads 1411, 1412 provides a driving signal for driving the light emitting region 11 .

The protection unit covers the light-emitting area 11 of the substrate 1 . Since the protection unit is not related to the improvement of the present invention and is the same as the prior art flat-panel display, it will not be described in detail.

By setting the first guide line area 17 and the second guide line area 18 on different sides of the conductive pads 1411, 1412 to increase the distance between the guide line areas 17, 18, the first When the conductive medium 2 and the second conductive medium 3 are in contact with the multiple first guide wires in the first guide wire area 17 and the multiple second guide wires in the second guide wire area 18 at the same time, the Contact errors will not occur.

The first insulating layer 191 is disposed between the plurality of first conductive spacers 1411 and the light emitting area 11 and covers part of the first wiring area 151, and is made of insulating material so that the second conductive medium 3 When contacting the second wire region 18 , it will not contact the plurality of first wires in the first wire regions 151 . The first insulating layer 191 is generally made of organic material, and is mostly fabricated by sputtering (spin coating); or covers the first wiring area 151 in other ways, but not limited thereto.

It is worth noting that, for flat-panel displays with higher resolution, the first wiring region 15 can also be all wired on one side of the light-emitting region 11, so only the first conductive medium 2 is needed to connect with all the first conductive medium 2. The first lead wires in a lead wire region 17 are electrically connected.

Referring to Fig. 3, the second preferred embodiment of the present invention is mostly the same as the first preferred embodiment in the components and the connection relationship between the components, the difference is that the second preferred embodiment is connected with two external external A conductive medium 2 and two second conductive mediums 3 are electrically connected, and the substrate 1 of the flat-panel display includes a first wire region 15 and a second wire region 16, and the first wire region 15 contains a first wiring region 151, A plurality of first conductive pads 1411 and a first lead area 17; the second lead area 16 contains a second lead area 161, a second lead area 18 and a plurality of second conductive pads 1412. A part of the two-connection area 161 is covered with a second insulating layer 192 . The second wiring area 161 is located between the light emitting area 11 and the plurality of second conductive pads 1412 , and the first wiring area 151 and the first wiring area 17 are located between the first conductive pads 1411 and the plurality of second conductive pads 1412 . Between the light emitting regions 11 , and the first guiding line region 17 is adjacent to the first conductive pads 1411 .

These first conductive mediums 2 and these second conductive mediums 3 are respectively electrically connected to the first guide wires of the first guide wire area 17 and the second guide wires of the second guide wire area 18, so they are also There may be sufficient distance between the first conductive media 2 and the second conductive media 3 . In this case, the second insulating layer 192 is disposed between the plurality of second conductive pads 1412 and the light emitting region 11 and covers the second wiring region 161 .

Similarly, for a large-size flat-panel display, the first wiring area 15 can also be concentrated on one side of the light-emitting area 11, so only one first wiring area 151 needs to be set on a plurality of first conductive pads. Between the sheet 1411 and the light-emitting area 11 , and a second guiding line area 18 on one side of the plurality of second conductive spacers 1412 , only one first conductive medium 2 and one second conductive medium 3 are needed at this time.

In the above-mentioned preferred embodiment of the present invention, these first conductive pads 1411 and second conductive pads 1412 are connection pads in the case of COG, but in the case of TAB, these first conductive pads 1411 and second conductive pads Sheet 1412 is a contact pad electrically connected to the FPC. FIG. 4 is a first preferred embodiment of the present invention, wherein the conductive pads 1411, 1412 are used to electrically connect with the FPC.

To sum up the above, compared with the flat panel display in the prior art, the first guide line area 77 and the second guide line area 78 are both arranged between these conductive pads 7411, 7412 and the light emitting area 71, the present invention adopts Only one of the first guiding line area 17 and the second guiding line area 18 is disposed between the plurality of first conductive pads 1411, the plurality of second conductive pads 1412 and the light emitting area 11, and the other A guide line area is not provided between these conductive pads 1411, 1412 and the light emitting area 11, and the first conductive medium 2 and the second conductive medium 3 are respectively in contact with the first guide line area 17 and the second The guide line areas 18 will be at a sufficient distance from each other so that contact errors will not occur, and thus the object of the invention will indeed be achieved.

But the above-mentioned ones are only preferred embodiments of the present invention, and should not limit the scope of the present invention, that is, all simple equivalent changes and modifications made according to the claims of the present invention and the content of the description of the invention are still the same. It belongs to the scope covered by the patent of the present invention.

Claims (14)

1. A flat panel display comprising: Substrates, including: a light emitting area formed on the substrate and capable of displaying images; A plurality of scanning lines and a plurality of data lines are arranged in the light-emitting area; Outside the light-emitting area, a first wire area and a second wire area are set as input for connecting external driving signals, wherein the scanning line is electrically connected to the first wire area, and the data line is electrically connected to the second wire area; The first wire area includes a first wiring area, a first guiding line area and a plurality of first conductive pads, one end of the first wiring area is electrically connected to a plurality of scanning lines, and the other end is electrically connected to the first conductive pads; The second wiring area includes a second wiring area, a second guiding line area and a plurality of second conductive pads, one end of the second wiring area is electrically connected to a plurality of data lines, and the other end is electrically connected to the second guiding line area ; The aforementioned first and second guide line regions are respectively used to guide the first external voltage into the scan line and the second voltage from the outside into the data line; The aforementioned first and second conductive pads are electrically connected to an external driving signal source; Wherein, the connection order of the first lead area is the first lead area, the first conductive pad and the first lead area, and the connection order of the second lead area is the second lead area, the second lead area and the second lead area. Two conductive gaskets. 2. The flat panel display according to claim 1, further comprising a protection unit disposed above the substrate. 3. The flat panel display according to claim 2, wherein the first guiding line area and the second guiding line area are located outside the protection unit. 4. The flat panel display according to claim 3, further comprising a first insulating layer partially covering the first wiring region and made of insulating material. 5. The flat panel display according to claim 4, wherein the first insulating layer is located between the plurality of first conductive pads and the light emitting region, and is located outside the protection unit. 6. A flat panel display comprising: Substrates, including: a light emitting area formed on the substrate and capable of displaying images; A plurality of scanning lines and a plurality of data lines are arranged in the light-emitting area; Outside the light-emitting area, a first wire area and a second wire area are set as input for connecting external driving signals, wherein the scanning line is electrically connected to the first wire area, and the data line is electrically connected to the second wire area; The first wiring area includes a first wiring area, a first guiding line area and a plurality of first conductive pads, one end of the first wiring area is electrically connected to a plurality of scanning lines, and the other end is electrically connected to the first guiding line area ; The second wire area includes a second wiring area, a second guiding line area and a plurality of second conductive pads, one end of the second wiring area is electrically connected to a plurality of data lines, and the other end is electrically connected to the second conductive pads; The aforementioned first and second guide line regions are respectively used to guide the first external voltage into the scan line and the second voltage from the outside into the data line; The aforementioned first and second conductive pads are electrically connected to an external driving signal source; Among them, the connection sequence of the first wire area is the first wire connection area, the first guide wire area and the first conductive pad, and the connection sequence of the second wire area is the second wire connection area, the second conductive pad and the second wire connection area. Guide line area. 7. The flat panel display according to claim 6, further comprising a protection unit disposed above the substrate. 8. The flat panel display according to claim 7, wherein the first guiding line area and the second guiding line area are located outside the protection unit. 9. The flat panel display according to claim 8, further comprising a second insulating layer partially covering the second wire area and made of insulating material. 10. The flat panel display according to claim 9, wherein the second insulating layer is located between the plurality of second conductive pads and the light emitting region, and is located outside the protection unit. 11. A test method for a flat panel display, comprising the following steps: (A) prepare flat-panel display, and aforementioned flat-panel display comprises: Substrates, including: a light emitting area formed on the substrate and capable of displaying images; A plurality of scanning lines and a plurality of data lines are arranged in the light-emitting area; A first wire area and a second wire area are set outside the light-emitting area as input for connecting external driving signals, wherein the scan line is connected to the first wire area, and the data line is electrically connected to the second wire area; The first wire area includes a first wiring area, a first guiding line area and a plurality of first conductive pads, one end of the first wiring area is electrically connected to a plurality of scanning lines, and the other end is electrically connected to the first conductive pads; The second wiring area includes a second wiring area, a second guiding line area and a plurality of second conductive pads, the second wiring area is electrically connected to a plurality of data lines, and the other end is electrically connected to the second guiding line area; The aforementioned first and second conductive pads are electrically connected to an external driving signal source; Wherein, the connection order of the first lead area is the first lead area, the first conductive pad and the first lead area, and the connection order of the second lead area is the second lead area, the second lead area and the second lead area. Two conductive gaskets; (B) contacting at least one first conductive medium with the first guide line area on the flat-panel display, and contacting at least one second conductive medium with the second guide line area on the flat-panel display; and (C) Leading the first voltage to a plurality of scan lines from the first conductive medium through the first guide line area, and simultaneously introducing the second voltage to a plurality of data lines from the second conductive medium through the second guide line area, and performing test. 12 . The method for testing a flat panel display according to claim 11 , wherein the flat panel display further comprises a first insulating layer and a protection unit partially covering the first wiring region and made of insulating material. 13 . The first insulating layer is between the plurality of first conductive pads and the light emitting area, and is located outside the protection unit. 13. A test method for a flat panel display, comprising the following steps: (A) prepare flat-panel display, and aforementioned flat-panel display comprises: Substrates, including: a light emitting area formed on the substrate and capable of displaying images; A plurality of scanning lines and a plurality of data lines are arranged in the light-emitting area; A first wire area and a second wire area are set outside the light-emitting area as input for connecting external driving signals, wherein the scan line is connected to the first wire area, and the data line is electrically connected to the second wire area; The first wiring area includes a first wiring area, a first guiding line area and a plurality of first conductive pads, one end of the first wiring area is electrically connected to a plurality of scanning lines, and the other end is electrically connected to the first guiding line area ; The second wiring area includes a second wiring area, a second guiding line area and a plurality of second conductive pads, the second wiring area is electrically connected to a plurality of data lines, and the other end is electrically connected to the second conductive pads; The aforementioned first and second conductive pads are electrically connected to an external driving signal source; Among them, the connection sequence of the first wire area is the first wire connection area, the first guide wire area and the first conductive pad, and the connection sequence of the second wire area is the second wire connection area, the second conductive pad and the second wire connection area. guide line area; (B) contacting at least one first conductive medium on the flat panel display with the first guide line area, and contacting at least one second conductive medium with the second guide line area; and (C) Leading the first voltage to a plurality of scan lines from the first conductive medium through the first guide line area, and simultaneously introducing the second voltage to a plurality of data lines from the second conductive medium through the second guide line area, and performing test. 14. The method for testing a flat-panel display according to claim 13, wherein the flat-panel display further comprises a second insulating layer and a protection unit which partially cover the second wiring region and are made of insulating material. The second insulating layer is between the plurality of second conductive pads and the light-emitting area, and is located outside the protection unit.

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