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Gamma voltage generating device and method for generating gamma voltage

A technology for gamma voltage, generating devices, used in instruments, static indicators, etc.

Active Publication Date: 2017-09-22
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 generating device and method for generating gamma voltage
  • Gamma voltage generating device and method for generating gamma voltage
  • Gamma voltage generating device and method for generating gamma voltage

Examples

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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. In other words, 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 that generates the gamma voltage, so that the reference voltage generated by the digital-to-analog conversion unit can pass through the selection unit. Part of the end points of the resistor string are selectively coupled in the corresponding curve turning interval. In this way, the gamma voltage can respectively present a gamma curve that conforms to the panel characteristics of each manufacturer, thereby overcoming the cost and inventory problems caused by the manufacturing of the liquid crystal driver.

[0040] The technical content, featu...

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PUM

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Abstract

A gamma voltage generating device and a method for generating gamma voltage. The gamma voltage generating device includes a plurality of digital-to-analog conversion units, a resistor string and a plurality of selection units. Multiple digital-to-analog converting units generate multiple curve reference voltages. The resistor string includes a plurality of resistors connected in series to provide a plurality of endpoints, and some of the endpoints are set as a plurality of curve turning intervals. Each selection unit corresponds to each digital-to-analog conversion unit and each curve transition interval, and each selection unit selectively provides each curve reference voltage to one end point of the corresponding curve transition interval.

Description

Technical field [0001] The present invention relates to a gamma voltage generating device for a display device, and more particularly to a gamma voltage generating device and a method for generating gamma voltage that can provide multiple gamma curves according to customer requirements. Background technique [0002] With the evolution of optoelectronics and semiconductor technologies, the development of flat-panel displays has been promoted. Flat-panel displays have a variety of display technologies, and liquid crystal displays (LCD) have become the mainstream in the current consumer market due to their superior characteristics such as high space utilization efficiency, low power consumption, no radiation, and low electromagnetic interference. [0003] In the current liquid crystal display architecture, a gamma voltage generator must be provided outside the source driver of the liquid crystal driver to generate multiple gamma voltages, and accordingly control the LCD panel to displ...

Claims

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Application Information

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