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Display apparatus and driver circuit of display apparatus

A driver circuit, display device technology, applied in the direction of circuits, circuit devices, static indicators, etc.

Inactive Publication Date: 2005-08-17
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, in Patent Publication No. Hei 5-216441 (published on August 27, 1993) (corresponding to European Patent Publication No. 0533823 (published on August 4, 1993), hereinafter referred to as "Patent Document 6"), Only reveals that adjacent sampling pulses do not overlap, nothing reveals or implies precharge

Method used

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  • Display apparatus and driver circuit of display apparatus
  • Display apparatus and driver circuit of display apparatus
  • Display apparatus and driver circuit of display apparatus

Examples

Experimental program
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Embodiment approach 1

[0071] Use Figure 1~ image 3 and Figure 14 ~ Figure 18 An embodiment of the present invention is described as follows.

[0072] The display device driver circuit of this embodiment is a data signal line driver for a liquid crystal display device. FIG. 1 shows the composition of such a data signal line driver 31 .

[0073] The data signal line driver 31 has a shift register 31a, a sampling section 31b, and an overlap preventing section 31c.

[0074] The shift register 31a has multiple stages of set-reset flip-flops SRFF1, SRFF2, . . . , and a plurality of switch circuits (pulse signal supply circuits) ASW1, ASW2, . The switch circuit ASW k (k=1, 2, . . . ) uses the Q output of the flip-flop SRFF k as the control signal of conduction (on) and non-conduction (off). When the switch circuit ASW where k is an odd number is turned on, a clock signal (pulse signal, pulse for precharging) SCK supplied from an external supply source separate from the timing pulse described later i...

Embodiment approach 2

[0117] Using Figure 4 and Figure 5 Another embodiment of the present invention will be described as follows. For convenience of description, constituent units having the same functions as those described in Embodiment 1 are assigned the same reference numerals, their descriptions are omitted, and only differences will be described.

[0118] The display device driver circuit of this embodiment is a data signal line driver for a liquid crystal display device. FIG. 4 shows the composition of such a data signal line driver 32 .

[0119] The data signal line driver 32 has a shift register 32a, a sampling section 32b, and an overlap prevention section 32c.

[0120] The shift register 32a and the anti-overlapping unit 32c have the same composition as the shift register 31a and the anti-overlapping unit 31c in FIG. 1 , and only the composition of the sampling unit 32b is different. Specifically, the sampling unit 31b in FIG. 1 sets a dummy data signal line DSL connected to a dummy...

Embodiment approach 3

[0129] With Figure 7, Figure 8 and Figure 19 ~ Figure 2 1 Description Another embodiment of the present invention is as follows. Components having the same functions as those described in Embodiments 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted.

[0130] The display device driver circuit of this embodiment is a data signal line driver for a liquid crystal display device. FIG. 7 shows the composition of such a data signal line driver 33. As shown in FIG.

[0131] The data signal line driver 33 has a shift register 33a, a sampling section 33b, and an overlap preventing section 33c.

[0132] The sampling unit 33b and the anti-overlapping unit 33c have the same composition as the sampling unit 31b and the anti-overlapping unit 31c in FIG. 1 , and only the composition of the shift register 33a is different.

[0133] The shift register 33a has flip-flops SRFF k (k=1, 2, . . . ) of FIG. 1 and level shifter circuits LSD0, LSD1, LS1,...

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Abstract

A driver circuit of a display apparatus is provided with a nor circuit in each output line of a timing pulse. To the nor circuit, inputted are a timing pulse to be supplied to the output line and a pre-charge pulse for pre-charging a data signal line SL to which a write signal is being inputted based on the timing pulse. With this structure, it is possible to realize a driver circuit storing a pre-charge circuit of a display apparatus, which can surely prevent a collision between a pre-charge potential and a potential of a video signal in a signal supply line when pre-charging the signal supply line from a pre-charge power supply of a small driving performance, while maintaining the number of stages in the shift register to be the required minimum number.

Description

field of invention [0001] The present invention relates to a driver circuit and a display device for supplying a write signal after precharging a signal supply line of a display device. Background of the invention [0002] In an active matrix liquid crystal display device driven by dots sequentially, when the liquid crystal panel is AC driven, each data signal line is precharged before the video signal is supplied to the pixel through the data signal line, so that each pixel is stably charged to desired power. At this time, if all the data signal lines are precharged at once, since the total wiring capacitance of all the data signal lines is large, it is necessary to increase the driving capability of the precharge power supply. As a technique capable of solving this problem, there is an existing configuration in which precharging is performed for each cell with a small number of data signal lines. [0003] For example, the Japanese Laid-Open Patent Publication "Patent Pub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G09G3/20G09G3/36
CPCG09G3/3688G09G2310/0248Y02E60/10H01M10/4257H01M10/46H01M2220/30H01M50/20
Inventor 村上祐一郎鹫尾一
Owner SHARP KK
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