Title:
【発明の名称】液晶ディスプレイ用セルの検査方法
Document Type and Number:
Japanese Patent JP2900019
Kind Code:
B2
Abstract:
A method of inspecting cells of liquid crystal displays comprising the first step in which the empty TFTs in the active color LCD arrays are energized to charge the auxiliary pixel capacitor corresponding to the individual electrodes, the charged condition is maintained by deenergizing the TFT's, the electric charge is released through the source and drain of the TFTs and the resistor connected to the ground side thereof by re-energizing the TFTs, and the amount of the discharge is measured and the second step in which the same energizing, deenergizing, re-energizing, charging, discharging and measurement as done in the first step are made on the TFTs filled with a liquid crystal in the active color LCD arrays, the difference between the amounts of discharge measured in the first and second steps is integrated or the time constant of the amount of discharge measured in the first step is deducted from the time constant of the amount of discharge measured in the second step.
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Inventors:
TAKAHASHI ISAMU
Application Number:
JP10289595A
Publication Date:
June 02, 1999
Filing Date:
March 23, 1995
Export Citation:
Assignee:
TOOKEN KOGYO KK
International Classes:
G01R31/00; G02F1/136; G02F1/1368; G09G3/00; G02F1/13; (IPC1-7): G01R31/00; G02F1/136
Domestic Patent References:
| JP659283A | ||||
| JP1127973A |
Attorney, Agent or Firm:
Isao Sasaki (1 person outside)