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Liquid-crystal displaying devices

A liquid crystal display, converter technology, used in static indicators, instruments, etc.

Inactive Publication Date: 2007-07-04
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pulse generating device is used to generate sampling pulses to sample the input digital signal on a pixel-by-pixel basis over time

Method used

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  • Liquid-crystal displaying devices
  • Liquid-crystal displaying devices
  • Liquid-crystal displaying devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] FIG. 2 is a block diagram of a liquid crystal display (LCD) according to an embodiment of the invention. The liquid crystal display of this example is formed by a combination of a driving circuit and a pixel unit, and is used to receive a digital signal input with a voltage smaller than the voltage of the driving circuit (Vdd). The received digital signal is an N-bit digital data (for color display, Then the number of all data lines is equal to R, B, G multiplied by the number of parallel programs). As shown in FIG. 2, the liquid crystal display of this example includes a horizontal shift register 222, a set of sampling switches 202-1 to 202-n, a set of comparators 204-1 to 204-n, A set of latches 206-1 to 206-n, a set of voltage level shifters 208-1 to 208-n, and a set of digital-to-analog converters (DACs) 210-1 to 210- n, a set of analog buffers (buffers) 212-1 to 212-n, pixels 230, data lines 216-1 to 216-n, scan lines 214-1 to 214-n, and vertical shift register (vertic...

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Abstract

A liquid display is featured as the follows: pulse generating device is used to generate pulse signal for sampling data signal as per picture element, sampling device is used to get data input signal sample according to sampling pule, each comparing device has the first and the second input end as the first input end receives sampled digital data and the second received reference voltage, comparison result is outputted after the two are compared each lock device is connected to a comparing device for keeping comparison result of comparing device, each digital / analog conversion unit is used to convert signal kept in lock device to be analog signal which is written into picture element.

Description

Technical field [0001] The present invention relates to a liquid crystal display, in particular to a liquid crystal display including a new type of driving circuit. By reducing the number of pins of the flexible circuit board in the liquid crystal display and the number of signal lines on the liquid crystal display panel, the liquid crystal display needs The area is greatly reduced, thereby reducing the power required for driving and reducing costs. Background technique [0002] A data driver circuit (source driver) must receive fast digital sequence data, convert it into a parallel slower digital signal, and then convert it into an analog voltage to drive a liquid crystal display (LCD) panel. A panel is usually composed of many pixels (pixels), for example: an SVGA LCD panel has 800 (horizontal) × 600 (vertical) pixels, all the data must be correctly written into the pixels, the panel The data drive circuit on (panel) requires 800 unit circuits, each unit circuit has a 1-bit shi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/133G09G3/36
Inventor 孙文堂
Owner AU OPTRONICS CORP