LCD device of thin film transistor possessing function of restoring disconnection, and detection circuit with high impedance
A liquid crystal display, thin film transistor technology, used in static indicators, instruments, nonlinear optics, etc., to solve problems such as unstable or incorrect signals, increasing the distance from the visible area of the glass to the edge of the glass, and pixel color deviation.
Inactive Publication Date: 2008-01-30
SUNPLUS TECH CO LTD
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Problems solved by technology
[0011] 3. If a group of repair lines is only connected to one operational amplifier, the more repair lines will increase the distance from the visible area of the glass to the edge of the glass
[0012] Although the above-mentioned repairing technology can indeed provide the data line 28 with a repairing function to reduce the defective rate of products, it still has shortcomings.
Operational amplifier 24' makes its input terminal f floating because of no need to repair data line 28, so it will have uncertain output at output terminal d, and this output will form output competition (output competition) with operational amplifier 24, so The signal on the repair line at the output may be unstable or incorrect, causing color deviations in pixels receiving the output signal of these repair operational amplifiers
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[0026] The features and operation principles of the present invention will be described in detail with reference to the drawings as follows, wherein the same or similar parts are represented by the same or similar numerals.
[0027] FIG. 3 shows an embodiment of a thin film transistor liquid crystal display (TFT-LCD) with a disconnection repair function of the present invention. As shown in the figure, the TFT-LCD has an active matrix substrate 10, and the active matrix substrate 10 is provided with a plurality of vertically equidistantly arranged data lines 12 and a plurality of horizontally equidistantly arranged scan lines (Fig. not shown). The matrix lines formed by intersecting the data lines 12 and the scan lines form pixels arranged in a matrix form, and the pixels form the display area 11 . In order for each pixel to display a desired picture, the data line 12 and the scan line are driven by the data line driving units 16, 16' and a scan line driving unit (not shown i...
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The invention is a thin film transistor (TFT) liquid crystal display (LCD) with a broken wire repairing function and the high impedance detection circuit thereof. And the TFT LCD has a repairing circuit, which comprises a repairing operational amplifier and a high impedance detection circuit, where the high impedance detection circuit detects the input-end state of the operational amplifier: when the input end has a signal, the high impedance detection circuit enables a control signal to switch on the operational amplifier; and otherwise enables a control signal to switch off it, so as to avoid the competition of the output of the operational amplifier with those of the other ones.
Description
technical field [0001] The present invention relates to a thin film transistor liquid crystal display and a high impedance detection circuit with the ability to repair disconnection. Background technique [0002] Liquid Crystal Display (hereinafter referred to as LCD) has the characteristics of small size and light weight, so it is a mainstream portable display; and because of the sharp drop in price, it has become the most potential small and medium-sized display in the market. , and the thin film transistor liquid crystal display (Thin Film Transistor Liquid Crystal Display, hereinafter referred to as TFT-LCD) is the most popular. [0003] In a general TFT-LCD, a common electrode substrate and an active matrix substrate are opposed to each other, and the liquid crystal material is sandwiched between the two substrates. As shown in FIG. 1 , an active matrix substrate 10 is provided with a matrix circuit composed of a plurality of data lines 12 and a plurality of scan lines...
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IPC IPC(8): G02F1/136G02F1/133G09G3/36
Inventor 饶永年周世宗侯春麟
Owner SUNPLUS TECH CO LTD