Image display device
A technology for image display devices and gate drive circuits, which is applied in the direction of static indicators, digital memory information, instruments, etc., can solve the problem of increasing the scale of gate line circuits, increasing the frame size of image display panels, and the difficulty in realizing gate Line scan switching function and other issues
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AI Technical Summary
Problems solved by technology
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Embodiment approach 1
[0040] The feature of this embodiment is that by arranging the first gate driving circuit which scans the gate lines in one direction on the substrate, furthermore, on the same substrate, the second gate driving circuit which scans the gate lines in one direction is placed on the same substrate. The pole driving circuit is configured to scan the gate lines along a different scanning direction from that of the first gate driving circuit, that is, to perform bidirectional scanning. Hereinafter, this embodiment will be described in detail with reference to the drawings.
[0041] FIG. 1 is a block diagram schematically showing the configuration of a liquid crystal display device according to this embodiment. In FIG. 1 , a pixel array 1 and first and second gate driver circuits 2 and 3 are formed on a glass substrate among TFT substrates that constitute one substrate of a liquid crystal panel. Furthermore, the first and second gate drive circuits 2 and 3 are configured using a-SiT...
Embodiment approach 2
[0078] This embodiment is that a power switching circuit is added to the image display device of the first embodiment. The power supply switching circuit switches the above-mentioned power supply voltage according to an external signal, so as to apply voltage for the first and second gate driving circuits to one gate driving circuit controlled to be in an active state in the first and second gate driving circuits. The supply voltage of the power circuit. On the other hand, the power switching circuit fixes all or part of its power supply to the gate drive circuit GND or other fixed voltage VSS for another gate drive circuit that is controlled not to operate, based on the above-mentioned external signal. Hereinafter, the present embodiment will be described with reference to the drawings.
[0079] FIG. 5 is a block diagram showing a configuration example of a liquid crystal display device according to this embodiment. The difference from FIG. 1 is that, as already described, ...
Embodiment approach 3
[0087] FIG. 9 is a circuit diagram showing the configuration of the image display device of the present embodiment. The device of FIG. 9 is characterized in that the shift register circuit in the image display device of FIG. 1 described in the first embodiment is replaced with the shift register circuit shown in FIG. 2 of Patent Document 1.
[0088] Therefore, in the device of FIG. 9 , in order to reset the gate output of the last-stage shift register SRCn, the number of stages of each shift register of the first and second gate drive circuits 2 and 3 is changed from n stages to ( n+1) level (increase 1 level). That is, in each gate drive circuit 2, 3, only the output terminal OUT of the shift register SRCn+1 of the (n+1)th stage is connected only to the reset terminal CT of the shift register SRCn of the final stage. Furthermore, in the device shown in FIG. 9 , two dummy gate lines G0 and Gn+1 are arranged in the pixel array 1, and the two dummy gate lines G0 and Gn+1 are fi...
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