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Signal generator circuit, liquid crystal display device

A signal generation and display device technology, applied to static indicators, instruments, etc., can solve problems such as complex structure of CS driver

Inactive Publication Date: 2013-03-06
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] but, Figure 32 There is a problem with the overly complex structure in the CS driver shown

Method used

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  • Signal generator circuit, liquid crystal display device
  • Signal generator circuit, liquid crystal display device
  • Signal generator circuit, liquid crystal display device

Examples

Experimental program
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Effect test

Embodiment approach 1

[0048] figure 1 It is a block diagram showing the configuration of the present liquid crystal display device 1 . As shown in the figure, the present liquid crystal display device 1 includes: a display control circuit 2 ; a liquid crystal panel 3 ; a source driver 4 ; a gate driver 5 and a CS driver 6 . In the liquid crystal panel 3, there are scanning signal lines (Gn-1·Gn·Gn+1), data signal lines (Si), pixels (PXn-1, PXn, PXn+1) and storage capacitance wirings (CSn-1·CSn·CSn+1 ), for example, the pixel electrode provided in the pixel PXn is connected to the scanning signal line Gn and the data signal line Si through the TFT, and forms a capacitor with the storage capacitor line CSn. Furthermore, the storage capacitor wiring CSn is connected to the n-th output terminal Un of the CS driver 6 , and the scanning signal line Gn is connected to the n-th output terminal On of the gate driver 5 . Here, the gate driver 5 (which can be bidirectionally shifted) for driving the scanni...

Embodiment approach 2

[0095] Figure 25 It is a block diagram showing another configuration of the liquid crystal display device 1 . Figure 25 The liquid crystal display device 1 includes: a display control circuit 2 ; a liquid crystal panel 3 ; a source driver 4 ; a gate driver 5 and a COM driver 66 . In the liquid crystal panel 3, there are scanning signal lines (Gn-1 Gn Gn+1), data signal lines (Si), pixels (PXn-1, PXn, PXn+1) and common electrodes (COMn-1, COMn, COMn+1) For example, the pixel electrode provided in the pixel PXn is connected to the scanning signal line Gn and the data signal line Si through the TFT, and forms a liquid crystal capacitance with the common electrode COMn. Furthermore, the common electrode COMn is connected to the output terminal Zn of the nth stage of the COM driver 66 , and the scanning signal line Gn is connected to the output terminal On of the nth stage of the gate driver 5 . Here, the gate driver 5 (which can be bidirectionally shifted) for driving the scan...

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PUM

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Abstract

Disclosed is a signal generator circuit, which is employed in a display device comprising: pixels further comprising pixel electrodes; conductors that form capacitance with the pixel electrodes; data signal line drive circuits that output data signals, the polarity whereof reverses once in every n horizontal scan intervals (where n is a natural number); and scan signal line drive circuits that output scan signals. The signal generator circuit generates drive signal of the conductors, and includes flip-flops of a plurality of stages. A gate circuit and a latch circuit are disposed upon each flip-flop. In a flip-flop of a given stage, the scan signal of the preceding stage and the scan signal of the following stage are inputted into the gate circuit, and the polarity signal that reverses once in every n horizontal scan intervals is inputted via the gate circuit into the latch circuit. The drive signal of the given stage is generated according to the output of the flip-flop of the given stage. It is thus possible to implement a driver circuit that is employed in a charge-coupling CC driven or a COM-driven liquid crystal display device with a simple configuration.

Description

technical field [0001] The present invention relates to a signal generation circuit (driver circuit), which is applied to CC (Charge Coupling: charge coupling) drive (drive to change the potential of the pixel electrode after writing data), COM drive (to change the potential of the pixel electrode before writing data). Common electrode potential drive) liquid crystal display device. Background technique [0002] Patent Document 1 discloses a conventional liquid crystal display device that performs CC driving. In this liquid crystal display device, after writing data (signal potential) to the pixel electrode and deactivating the scanning signal line, the potential polarity of the storage capacitor wiring (CS wiring) that forms a capacitance with the pixel electrode is adjusted. Inversion, thereby changing the potential of the pixel electrode. Figure 32 The configurations of the gate driver (scanning signal line driver circuit) 30 and the CS driver (storage capacitance wirin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G02F1/133G09G3/20
CPCG09G3/3677G09G3/3614G09G3/3655G09G3/3674G09G3/3648
Inventor 古田成横山真村上祐一郎佐佐木宁
Owner SHARP KK