Display driving integrated circuit and method for determining wire configuration of the same
An integrated circuit and display driver technology, applied to static indicators, instruments, etc., can solve the problems of inability to detect impurities 936, inability to detect voltage changes, etc.
Inactive Publication Date: 2009-07-01
SHARP KK
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Problems solved by technology
Therefore, since the voltage resolution of the aforementioned tester is only 1 mV, it is impossible to detect the voltage change caused by the trapped impurities 936, so that the impurities 936 cannot be detected.
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[0068] Below, according to Figure 1 to Figure 12 , to describe the embodiment of the present invention. figure 1 It is a block diagram showing the configuration of main parts of the liquid crystal display device 1 according to the embodiment of the present invention. figure 2 It is a circuit diagram showing the configuration of main parts of the liquid crystal panel 2 provided in the liquid crystal display device 1 .
[0069] The liquid crystal display device 1 is a TFT (Thin Film Transistor) type liquid crystal display device which is a typical type of active matrix type. This liquid crystal display device 1 includes a liquid crystal display unit 34 and a liquid crystal drive circuit (liquid crystal drive unit) 35 that drives the liquid crystal display unit 34 . The liquid crystal display unit 34 has a TFT liquid crystal panel 2 . In addition, a liquid crystal display element 12 ( figure 2 ) and the counter electrode (common electrode) 3 described later.
[0070] On ...
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Abstract
The invention provides an integrated circuit for display driving and a method for determining its wiring configuration. The integrated circuit for display driving includes: a grayscale display reference voltage generating circuit, which generates a grayscale display reference voltage corresponding to 64 grayscales through resistance division according to a predetermined reference voltage; a D / A conversion circuit, which generates grayscale display reference voltages corresponding to 64 grayscales Display reference voltage for analog conversion of display data; and a reference voltage wiring group composed of 64 reference voltage wirings, which are arranged in parallel with each other, and are used to supply the gray scale to the D / A conversion circuit. A grayscale display reference voltage corresponding to 64 grayscales generated by a display reference voltage generation circuit, wherein 64 reference voltage wirings are arranged such that a potential difference between two adjacent reference voltage wirings is a potential difference of 2 grayscales or more .
Description
technical field [0001] The present invention relates to an integrated circuit for display driving and a method for determining its wiring configuration, wherein the integrated circuit for display driving includes: a gray scale display reference voltage generating circuit, which generates gray scale (hereinafter referred to as gray scale) corresponding the grayscale display reference voltage; the D / A conversion circuit, which performs analog conversion on the display data according to the grayscale display reference voltage; and the reference voltage wiring, which is used to provide the grayscale display reference voltage to the D / A conversion circuit. Background technique [0002] Conventionally, in an active matrix liquid crystal display device, a gradation display reference voltage generating circuit for driving a liquid crystal element using an intermediate voltage divided by resistance has been known (for example, refer to Patent Document 1: No. 3472473 Patent Specificat...
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IPC IPC(8): G09G3/36G09G3/20G02F1/133
Inventor 梶原典幸藤野宏晃中尾友昭折坂幸久宫崎荣作中原道弘西田康宏物申正彦
Owner SHARP KK