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Display circuit with image data conversion circuit in LCOS

A technology for image data and conversion circuits, applied in static indicators, instruments, etc., can solve problems such as distortion, thickness deviation, and different photoelectric curves

Inactive Publication Date: 2006-06-21
上海华园微电子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] On the one hand, due to the nonlinearity of photoelectric conversion through liquid crystal, the gray level represented by the digital video signal composed of 8-bit binary numbers and the actual gray level of the light intensity generated by each pixel after photoelectric conversion by liquid crystal will be different. There will be differences and cause distortion; on the other hand, the photoelectric curves of red, green, and blue colors are also different; thirdly, due to the deviation of liquid crystal formula and thickness during liquid crystal packaging, the calibration curve of each LCOS display is also different.

Method used

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  • Display circuit with image data conversion circuit in LCOS
  • Display circuit with image data conversion circuit in LCOS
  • Display circuit with image data conversion circuit in LCOS

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0015] Depend on figure 1 , figure 2 Visible: the present invention comprises DVI converter 1, image data storage circuit 3, display drive circuit 4, system control circuit 6, LCOS display chip 5; Also comprise an image data conversion circuit 2; Described image data conversion circuit 2 compare and confirm the image data signal and the color conduction signal transmitted from the DVI converter 1 and output it to the image data storage circuit 3;

[0016] Described image data conversion circuit 2 comprises a photoelectric curve look-up table (Lock up table) 25 that receives the image data signal that transmits from DVI converter 1; Described photoelectric curve look-up table 25 stores red, green, blue The three-color photoelectric conversion curves are placed in different areas according to the addresses. Each curve consists of 256 bytes, and...

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Abstract

The invention discloses a display circuit in the LCOS within image data conversion circuit, which comprises the following parts: DVI converter (1), image data conversion circuit (2), image data storage circuit (3), display driving circuit (4), system control circuit (6) and LCOS display chip (5), wherein the image data conversion circuit (2) compares and affirms the image data signal and color communication signal from DVI converter (1), which is output in the image data storage circuit (3). The invention is consistent with the grey scale grade of each reflected light grey scale and digital video signal pixel on the display chip at last, which can be adjusted according to the real chip property.

Description

technical field [0001] The present invention relates to a high-definition digital display technology——LCOS (Liquid Crystal On Silicon, which is a reflective liquid crystal projection technology based on large-scale integrated circuits), and especially relates to a display circuit with an image data conversion circuit in this technology. Background technique [0002] Liquid crystal display technology is developing rapidly, and its application fields are constantly expanding. The contrast and response speed of liquid crystal display are closely related to liquid crystal material and liquid crystal photoelectric effect. There are many kinds of liquid crystal display methods in practical applications. The most commonly used LCD (liquid crystal display) is twisted nematic (TN, that is, twisted nematic) liquid crystal. show. The basic principle of TN type liquid crystal is the control of polarized light. When light enters a TN-type liquid crystal, its polarity is twisted along w...

Claims

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Application Information

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IPC IPC(8): G09G3/36G02F1/133
Inventor 印义中郭俊印义言
Owner 上海华园微电子技术有限公司
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