CN100489925C - Display device and test circuit thereof - Google Patents
Display device and test circuit thereof Download PDFInfo
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- CN100489925C CN100489925C CNB2006101403607A CN200610140360A CN100489925C CN 100489925 C CN100489925 C CN 100489925C CN B2006101403607 A CNB2006101403607 A CN B2006101403607A CN 200610140360 A CN200610140360 A CN 200610140360A CN 100489925 C CN100489925 C CN 100489925C
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- 238000012360 testing method Methods 0.000 title claims abstract description 72
- 239000011521 glass Substances 0.000 claims description 4
- 230000004913 activation Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
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Abstract
本发明公开了一种显示装置及其测试电路，该显示装置包含一像素阵列、一前端电路、一测试电路以及一致能电路，该测试电路用以测试该像素阵列，该致能电路根据一定电压以决定是否致能该测试电路。当该像素阵列测试完毕后，该定电压由该前端电路所提供以非致能该测试电路。
The invention discloses a display device and a test circuit thereof. The display device comprises a pixel array, a front-end circuit, a test circuit and a function circuit. The test circuit is used to test the pixel array. to determine whether to enable the test circuit. After the pixel array is tested, the constant voltage is provided by the front-end circuit to disable the test circuit.
Description
Technical field
The present invention relates to a kind of display device and test circuit thereof, particularly relate to a kind of according to certain voltage whether determining the activation test circuit, and can be after test be finished the display device and the test circuit thereof of this test circuit of disabled.
Background technology
In recent years, the development of flat-panel screens is more and more rapider, has replaced traditional cathode-ray tube display gradually.Flat-panel screens now mainly contains following several: organic light emitting diode display (OrganicLight-Emitting Diodes Display; OLED), plasma scope (Plasma DisplayPanel; PDP), LCD (Liquid Crystal Display; LCD) and Field Emission Display (Field Emission Display; FED) etc.No matter be above-mentioned which kind of flat-panel screens, all must test during making its array of display circuit, can operate as normal with the flat-panel screens of determining to make.
Fig. 1 is the known circuit diagram of testing for flat-panel screens.Flat-panel screens comprises array of display 101 and test cell 103.Array of display 101 has comprised many electrode wirings, 103 of test cells are electrically connected to array of display 101 by activation unit 105, and activation unit 105 determines whether that through enable signal 100 input test signal to these electrode distributions test in order to the array of display to flat-panel screens.
Known flat-panel screens can be cut off the electric connection of test cell 103 and array of display 101 after finishing test, or makes activation unit 105 not connect any signal and present the state of suspension joint (floating).And with anisotropic conductive film (anisotropic conductive film; ACF) connect array of display 101 and other printed circuit board (PCB) or drive integrated circult (IC).But, the activation unit 105 that presents floating still is seated in the flat-panel screens, because anisotropic conductive film connects other assembly and/or signal may cause other signal coupling (coupling) to activation unit 105, this coupled signal may make activation unit 105 open, and then causes the shown picture of array of display 101 unusual.Therefore how after the flat-panel screens test, what eliminate that display frame produced because of original test cell 103 and activation unit 105 is this field problem demanding prompt solution unusually.
Summary of the invention
The object of the present invention is to provide a kind of display device and test circuit thereof, solve the problem that exists in the above-mentioned known technology.
To achieve these goals, the invention provides a kind of test circuit that is applied to a display device, this display device comprises a pel array and a front-end circuit.This test circuit comprises a test cell and an activation unit, and this test cell is in order to testing this pel array, this activation unit according to certain voltage whether to determine this test cell of activation.After the test of this pel array finishes, this decide voltage by this front-end circuit provide with this test cell of disabled.
To achieve these goals, the present invention also provides a kind of display device, comprises a pel array, a front-end circuit, a test circuit and an activation circuit.This test circuit is in order to testing this pel array, this enable circuit according to certain voltage whether to determine this test circuit of activation.After the test of this pel array finishes, this decide voltage by this front-end circuit provide with this test circuit of disabled.
The invention provides certain voltage and decide whether activation test circuit of enable circuit, and after test finishes, decide be provided (but voltage potential change) that voltage continues and make enable circuit when display operation, present the disabled state.Therefore the pel array of display device can tested circuit and enable circuit influence and is caused display abnormality, and then reaches and allow the purpose of the normal operation of display device.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is the synoptic diagram of known flat-panel screens;
Fig. 2 is the synoptic diagram of preferred embodiment of the present invention; And
Fig. 3 is another synoptic diagram of preferred embodiment of the present invention.
Wherein, Reference numeral:
100: enable signal 101: array of display
103: test cell 105: the activation unit
2: display device 20: test signal
21: pel array 22: decide voltage
23: test circuit 25: enable circuit
27: front-end circuit 29: Measurer
30: low voltage potential decide voltage
Embodiment
A preferred embodiment of the present invention is a kind of display device 2 as shown in Figure 2, and it comprises a pel array 21, a test circuit 23, an activation circuit 25 and a front-end circuit 27.When testing, display device 2 is connected to a Measurer 29, and Measurer 29 provides certain voltage 22 to determine whether activation test circuit 23.For example in this preferred embodiment, when deciding voltage 22 for high voltage potential, enable circuit 25 promptly is enabled, and the test signal 20 that makes test circuit 23 provide inputs to pel array 21, makes the pel array 21 can be tested.And when deciding voltage 22 for low voltage potential, enable circuit 25 is promptly by disabled, and the test signal 20 that test circuit 23 is provided can't input to pel array 21, makes that pel array 21 can't be tested.
When wanting test pixel array 21, deciding voltage 22 is provided by Measurer 29, when test signal 20 is sent into pel array 21 with control test circuit 23.After pel array 21 tests finish, when other assembly will be placed in the display device 2, as shown in Figure 3, Measurer 29 can stop to provide decides voltage 22 to enable circuit 25, front-end circuit 27 will be connected to enable circuit 25, and provide the voltage 30 of deciding of a low voltage potential to be in the disabled state to guarantee test circuit 23, prevent that enable circuit 25 or test circuit 23 from influencing the normal operation of the pel array 21 of display device 2 because of suspension joint.
The present invention does not limit the kind of front-end circuit 27, and the front-end circuit 27 of the foregoing description can be the one drive circuit that drives pel array 21, a flexible print circuit (the Flexible Printed Circuit that connects pel array 21 and system end; FPC) or other type any circuit of one fixed voltage can be provided, for example be positioned at the circuit on the direct pressing integrated circuit (IC) chip on glass (IC Chip on Glass).
From the above, the present invention decides the unlatching of enable circuit by certain voltage when test.After the display device test finishes, then lasting being provided by front-end circuit so that enable circuit presents the disabled state when display operation of voltage is provided, therefore the pel array of display device can not be subjected to the influence of enable circuit or test circuit suspension joint and cause display abnormality, and then reaches the purpose that allows display device normally move.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101403607A CN100489925C (en) | 2006-11-27 | 2006-11-27 | Display device and test circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101403607A CN100489925C (en) | 2006-11-27 | 2006-11-27 | Display device and test circuit thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1996443A CN1996443A (en) | 2007-07-11 |
| CN100489925C true CN100489925C (en) | 2009-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101403607A Active CN100489925C (en) | 2006-11-27 | 2006-11-27 | Display device and test circuit thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN100489925C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102339581B (en) * | 2011-09-28 | 2014-04-09 | 深圳市华星光电技术有限公司 | Virtual load board and testing system and testing method for liquid crystal display control panel |
| CN106782256B (en) | 2015-11-18 | 2020-11-03 | 上海和辉光电有限公司 | Display device with panel test circuit |
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- 2006-11-27 CN CNB2006101403607A patent/CN100489925C/en active Active
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| CN1996443A (en) | 2007-07-11 |
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