Gamma voltage generation device and method of generating Gamma voltage

A technology of gamma voltage and generating device, which is applied in the direction of instruments, static indicators, etc.

Active Publication Date: 2015-09-23
NOVATEK MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in order to meet the liquid crystal characteristics of various manufacturers, it is necessary to use gamma voltage generators with different layouts corresponding to the liquid crystal panels of various manufacturers, thereby causing cost and inventory problems.

Method used

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  • Gamma voltage generation device and method of generating Gamma voltage
  • Gamma voltage generation device and method of generating Gamma voltage
  • Gamma voltage generation device and method of generating Gamma voltage

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Embodiment Construction

[0039] In order to reduce the manufacturing cost of the liquid crystal driver and solve the inventory problem, embodiments of the present invention provide a gamma voltage generating device and a method for generating gamma voltage. That is to say, in the gamma voltage generating device of the embodiment of the present invention, a plurality of selection units are arranged between the digital-to-analog conversion unit and the resistor string generating the gamma voltage, so that the reference voltage generated by the digital-to-analog conversion unit can pass through the selection unit Selectively couple some end points of the resistor string in the corresponding turning interval of the curve. In this way, the gamma voltages can respectively present gamma curves conforming to the panel characteristics of various manufacturers, thereby overcoming the cost and inventory problems in the manufacture of the liquid crystal driver.

[0040] The technical content, features and effects...

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Abstract

A Gamma voltage generation device and a method of generating a Gamma voltage are disclosed. The Gamma voltage generation device comprises a plurality of digital to analog conversion units, a resistor string and a plurality of selection units. The plurality of digital to analog conversion units generate a plurality of curve reference voltages. The resistor string comprises a plurality of resistors which are connected in series so as to provide a plurality of end points. Parts of the end points are set to be a plurality of curve turning intervals. Each selection unit corresponds to each digital to analog conversion unit and each curve turning interval respectively. Each selection unit selectively provides each curve reference voltage to one end point of the corresponding curve turning interval.

Description

technical field [0001] The present invention relates to a gamma voltage generating device for a display device, and in particular to a gamma voltage generating device capable of providing various gamma curves according to customer requirements and a method for generating gamma voltage. Background technique [0002] With the evolution of optoelectronic and semiconductor technologies, the vigorous development of flat panel displays has been driven. The flat panel display has various display technologies, and the liquid crystal display (LCD) has become the mainstream in the current consumer market due to its superior characteristics such as high space utilization efficiency, low power consumption, no radiation, and low electromagnetic interference. [0003] In the architecture of today's liquid crystal displays, a gamma voltage generating device must be installed outside the source driver of the liquid crystal driver to generate multiple gamma voltages and control the correspon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
Inventor 黄如琳
Owner NOVATEK MICROELECTRONICS CORP
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