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Grayscale voltage generation circuit, driver circuit, and electro-optical device

A gray-scale voltage and generating circuit technology, applied in optics, nonlinear optics, instruments, etc., can solve the problem of increasing data lines and achieve high driving force, fast speed, and low power consumption

Inactive Publication Date: 2006-02-01
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the display area of ​​the liquid crystal display device is to be enlarged, or the pixels shall be finer, the number (quantity) of data lines will increase.

Method used

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  • Grayscale voltage generation circuit, driver circuit, and electro-optical device
  • Grayscale voltage generation circuit, driver circuit, and electro-optical device
  • Grayscale voltage generation circuit, driver circuit, and electro-optical device

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Embodiment Construction

[0054] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not unduly limit the content of the present invention described in the claims, and all the structures described below are not essential components of the present invention.

[0055] The gray scale voltage generating circuit in this embodiment is included in, for example, a driving circuit for driving a display device. The driving circuit can be used to drive an optoelectronic device whose optical properties are changed by applying an external voltage, such as driving a liquid crystal display device.

[0056] Hereinafter, the case where the grayscale voltage generating circuit in this embodiment is applied to a liquid crystal display device will be described, but it is not limited thereto, and it can also be applied to other optoelectronic devices and display devices.

[0057] 1. Liquid crystal display device

[0058] figure ...

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Abstract

The invention discloses a grey level voltage generating circuit capable of stably providing a grey level voltage according to various gamma characteristics with low cost and power consumption. The invention comprises: an input side resistance circuit of number one to number J voltage division nodes consisting of fixed number (J+1) of resistor elements arranged in series connection between a first power line and a second power line for dividing the voltage between the two power lines; number one to number J voltage follower circuits which input the voltage of each input voltage division node; an output side resistance circuit which is arranged between the two power lines and comprises number one to number J output voltage division nodes driven by the voltage follower circuits and dividing the voltage between the two ends; and a grey level voltage selection circuit which outputs the voltages of L resistance division nodes in K resistance division nodes capable of dividing the voltage between the two ends of the output side resistance circuit as grey level voltages. The voltage of number i output voltage division node is equal to the voltage of number i input voltage division node; J is less than K,J is less than L which is less than K,and 1 is less than or equal to I which is less than or equal to J,wherein J is a positive integer, and L and i are integers.

Description

technical field [0001] The invention relates to a gray scale voltage generating circuit, a driving circuit and a photoelectric device. Background technique [0002] In recent years, along with the spread of optoelectronic devices such as liquid crystal display devices, further improvement in display quality, higher definition, and the like have been demanded. [0003] Generally, the display devices represented by optoelectronic devices have their own inherent gamma characteristics. Moreover, the input (input voltage, input signal) and output (gray scale, light transmittance, brightness, etc.) of the display device is not a linear proportional relationship, but an exponential function relationship. Therefore, in order to have a linear proportional relationship between the input and output of the display device, the gamma characteristic relative to the input of the display device is considered, and the output correction is performed so that the display device can express the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/20G02F1/133
CPCG09G2310/027G09G2330/021G09G3/3688G09G3/36G02F1/133
Inventor 原太郎小林正典
Owner SEIKO EPSON CORP
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