Display, detection system and detection method for junction impedance thereof
A detection system and detection method technology, used in static indicators, measuring resistance/reactance/impedance, instruments, etc., can solve the problems of omission and screening of defective products, time-consuming, complicated methods, etc.
Active Publication Date: 2014-08-13
AU OPTRONICS CORP
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Problems solved by technology
For this detection method, if there is a pressing defect, it will usually be directly reflected on the lit display panel (such as flickering or excessive current consumption, etc.), but not all pressing defects can pass through this method. It is detected by the method, which often leads to the situation of missing and screening out defective products
Moreover, the above method is more complex and time-consuming
Method used
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Embodiment Construction
[0033] figure 1 is a schematic diagram of a detection system for the junction impedance of a display according to an embodiment of the present invention. figure 2 yes figure 1 A schematic diagram of the display panel. image 3 yes figure 1 A schematic side view of the display panel, circuit board and driver chip. Please also refer to figure 1 , figure 2 as well as image 3 , the detection system of the junction impedance of the display in this embodiment includes a display panel 100 , at least one circuit board 200 , at least one driving chip 300 and a test board 400 .
[0034] The display panel 100 has a plurality of connection wires 110 and at least one test wire 112. The connection wires 110 are used to input or output various signals, and the test wires 112 are used to input test signals, such as figure 2 shown. In more detail, the display panel 100 includes a substrate 102 , a plurality of scan lines SL, a plurality of data lines DL, a plurality of pixel struct...
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The invention discloses a display and a detection system for junction impedance thereof, wherein the detection system comprises a display panel, at least one circuit board, at least one drive chip and a test board. The display panel comprises at least one test wire and a plurality of connecting wires. The circuit board is electrically connected with the test wire and the connecting wires of the display panel. The drive chip comprises a plurality of connecting connection points, at least one test connection point, at least one comparator and at least one judgment logic circuit, wherein the connecting connection points and the at least one test connection point are electrically connected with the connecting wires and the test conducting wire of the display panel respectively; the at least one comparator is electrically connected with the test connection point; the at least one judgment logic circuit is electrically connected with the comparator; and the test board is electrically connected with the circuit board. Particularly, the test board provides a test signal; after the test signal is transmitted to the test connection point of the drive chip through the circuit board and the test wire, the test signal is compared with a reference signal in the comparator, and the judgment logic circuit judges the comparison result of the comparator. The invention also discloses a detection method of the display.
Description
technical field [0001] The invention relates to a detection system and a detection method of a display and its joint impedance. Background technique [0002] Generally speaking, besides the display panel, the display also includes a circuit board and a driver chip to drive the image display of the display panel. Usually, after the display is manufactured, a series of testing procedures will be carried out to confirm whether the display quality of the display meets the standard. [0003] Currently, automatic optical inspection machines are used to detect the junction impedance between the display panel and the circuit board and the junction impedance between the display panel and the driver chip. However, the automatic optical inspection machine can only judge whether the quantity and relative position of the pressed conductive particles between the display panel and the circuit board and between the display panel and the driving chip are normal. In other words, the automat...
Claims
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IPC IPC(8): G09G3/00G01R27/02
Inventor 陈志明林能毅
Owner AU OPTRONICS CORP