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Voltage conversion device with non-linear gain

A voltage conversion and non-linear technology, applied in the direction of gain control, electrical components, amplification control, etc., can solve the problems of affecting the effect of picture gradient and unnatural image

Inactive Publication Date: 2009-11-25
NOVATEK MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, through the known voltage conversion circuit 20, the data line signal output by the data line signal output circuit 104 will only be linearly amplified to the working range of the thin film transistor 114, so that the different gray scales presented by the thin film transistor liquid crystal display 10 are consistent with the The relationship between brightness is similar to a straight line, which affects the gradient effect of the picture and makes the image unnatural

Method used

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  • Voltage conversion device with non-linear gain
  • Voltage conversion device with non-linear gain
  • Voltage conversion device with non-linear gain

Examples

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Embodiment Construction

[0093] Please refer to image 3 , image 3 It is a schematic diagram of a voltage conversion device 30 according to an embodiment of the present invention. The voltage conversion device 30 is used for converting an analog voltage Vi output by an analog voltage source, which may be display data in a flat panel display. The voltage conversion device 30 includes a gain determination module 32 , a voltage selection module 34 and a voltage output module 36 . The gain determining module 32 is used to dynamically select different gains according to the magnitude of the analog voltage Vi, and includes an analog-to-digital converter 320 and a gain selector 322 . The analog-to-digital converter 320 is used to convert the analog voltage Vi into a digital signal, and the gain selector 322 determines an output gain according to the digital signal output by the analog-to-digital converter 320 . The voltage selection module 34 can select a DC voltage from a plurality of DC voltages Vdc(n)...

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Abstract

The voltage conversion device with nonlinear gain is used to convert the analog voltage output by an analog voltage source, including a gain determination module, a voltage selection module and a voltage output module. The gain determining module includes an analog-to-digital converter coupled to the analog voltage source, and a gain selector coupled to the analog-to-digital converter for determining an output gain. The voltage selection module is coupled to the analog voltage source and the analog-to-digital converter, and is used for outputting a DC voltage according to selection from a plurality of DC voltages. The voltage output module is used to output the amplified result of the DC voltage output by the voltage selection module according to the output gain judged by the gain selector.

Description

technical field [0001] The invention relates to a voltage conversion device, in particular to a voltage conversion device with nonlinear gain. Background technique [0002] Liquid crystal displays have the characteristics of light and thin appearance, low power consumption, and no radiation pollution, and have been widely used in information products such as computer systems, mobile phones, and personal digital assistants (PDAs). The working principle of the liquid crystal display is to use the liquid crystal molecules in different alignment states to have different polarization or refraction effects on light, so the penetration of light can be controlled through liquid crystal molecules in different alignment states, and output light of different intensities can be further generated. And red, green, blue light with different grayscale intensities. [0003] Please refer to figure 1 , figure 1 It is a schematic diagram of a known thin film transistor (Thin Film Transistor,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/20G09G5/02G09G5/10G02F1/133H03G3/20
Inventor 颜志仁
Owner NOVATEK MICROELECTRONICS CORP
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