Method and apparatus for testing driver circuits of AMOLED
AssigneeTPO Displays Corp.
InventorsShan-Hung Tsai, Ming-Hsien Sun, An Shih
Life of this patent
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Abstract
A method and an apparatus for testing a plurality of driver circuits of an AMOLED before OLEDs are implanted are provided. The method and the apparatus select one specific driver circuit to be tested and dispose a conductive board above the array glass of the OLED to form a capacitor. By using the data line, the scan line, and the power line of an AMOLED, the present invention is able to input and retrieve signals from driver circuits for analyzing each of them is normal or not.
Claims6
A method for testing a plurality of driver circuits on an array glass of an active matrix organic light emitting display (AMOLED) before organic light emitting diodes are implanted, each of the driver circuits including:
- a scan line, a data line, a power line, a first transistor, a second transistor and a first capacitor;
- the method comprising the steps of:
- (a) repeating the steps (b)˜(e) until a first signal and a second signal outputted from each of the driver circuits are retrieved;
- (b) enabling a target driver circuit via the scan line;
- (c) charging the first capacitor and retrieving the first signal from the data line when the first capacitor is discharged via the first transistor;
- (d) disposing a conductive board above the array glass to form a second capacitor between the conductive board and the array glass;
- (e) charging the second capacitor and retrieving the second signal from the power line when the second capacitor is discharged via the second transistor;
- and
- (f) analyzing the first and second signals to determine the functionality of the target driver circuit.
A apparatus for testing a plurality of driver circuits of an active matrix organic light emitting display (AMOLED) before organic light emitting diodes are implanted, the apparatus comprising:
- a pixel selection device for selecting a target driver circuit;
- a signal extractor for retrieving a signal;
- and
- a signal analyzer, connected to the signal extractor, for storing and analyzing the signal to determine the functionality of the target driver circuit.
Dependencies are inferred from the claim text.