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Non-linear D/A converter, applied LCD and method

A digital-to-analog converter, liquid crystal display technology, applied in the direction of digital-to-analog converter, analog/digital conversion, code conversion, etc., can solve the problems of high cost and large area of ​​digital-to-analog converter

Inactive Publication Date: 2009-02-04
INNOLUX CORP
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AI Technical Summary

Problems solved by technology

But not every gamma decoder in the digital-to-analog converter will be applied to the 1024 lines from light to dark. Although the selection of 1024 lines is more precise, it also makes the digital-to-analog conversion difficult due to the large number of bits. The area of ​​the device is larger and the cost is higher

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Embodiment Construction

[0017] The invention provides a nonlinear digital-to-analog converter and its applied liquid crystal display and method, which changes the resistance string in the digital-to-analog converter from equivalent value to nonlinear supply voltage, which can reduce the time when the gamma decoder selects the voltage. voltage range, thereby reducing the area of ​​the digital-to-analog converter and saving costs.

[0018] Fig. 2 is the liquid crystal display that applies the non-linear digital-to-analog converter provided by the present invention, comprises at least one digital-to-analog converter 20, a plurality of data drivers 22, display panel 24, timing controller 26 and gate controller 28, digital Data is input in the timing controller 26, and the timing controller 26 transmits the digital data to the data driver 22, and the reference voltage (gamma voltage) sent to the data driver 22 by the digital-to-analog converter 20 drives the pixels on the display panel 24. A plurality of ...

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Abstract

The invention provides a nonlinear digital-to-analog converter as well as a liquid crystal display and a method for applying the converter, wherein, at least one digital-to-analog converter is arranged in the liquid crystal display, and each digital-to-analog converter also comprises resistor strings nonlinearly connected with one another and at least one group of transmission gates, and the transmission gates are correspondingly connected with part of resistor strings for receiving the partial pressure produced by the resistor strings and outputting the analog voltage according to the digital data received by the digital-to-analog converters, and resistance regions corresponding to each transmission gate can overlap, therefore, better effects can be realized by using a few resistor strings, and the area of the digital-to-analog converters can also be reduced.

Description

technical field [0001] The invention relates to a technology of a nonlinear digital-to-analog converter, in particular to a nonlinear digital-to-analog converter and its applied liquid crystal display and method. Background technique [0002] In recent years, the optoelectronic industry has developed vigorously, especially the rapid development of liquid crystal display devices. The applications of liquid crystal display devices are mainly liquid crystal displays used in LCD TVs, personal computers or notebook computers; while the applications of small-sized liquid crystal display devices are mainly mobile phones, digital cameras and personal digital assistants (PDA) products, especially mobile phones. More than half of all small-sized liquid crystal display devices, and how to reduce the area of ​​liquid crystal display devices to meet small-sized applications has become a hot topic recently. [0003] The liquid crystal display device includes a timing controller, a data d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/66H03M1/76G09G3/36G09G3/20G02F1/133
Inventor 江致纬
Owner INNOLUX CORP
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