Display control device and control method

A control device and detector technology, applied in static indicators, cathode ray tube indicators, instruments, etc., can solve the problems of screen data coverage, repeated output of screen data, screen errors, etc.

Inactive Publication Date: 2018-03-09
MSTAR SEMICON INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the input frame rate is faster than the output frame rate, the display controller's buffer capacity will be insufficient and the frame data will be overwritten
If the output frame rate is faster than the input frame rate, the image data will be output repeatedly, causing image errors or unsmooth problems

Method used

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  • Display control device and control method
  • Display control device and control method
  • Display control device and control method

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Embodiment Construction

[0042] According to an embodiment of the present invention, a control device 100 for controlling frame synchronization is disclosed. Please refer to figure 1 , the control device 100 includes a detector 101 , a frequency adjustment signal generator 105 , a clock generator 107 and an output timing generator 109 . The detector 101 receives an input field reference signal 102 and an output field reference signal 103 . The detector 101 compares the input field reference signal 102 and the output field reference signal 103 to determine a lead lag signal 113 . The lead-lag signal 113 indicates that the output field reference signal 103 is leading or lagging relative to the input field reference signal 102 . The frequency adjustment signal generator 105 receives the lead lag signal 113 . The frequency adjustment signal generator 105 outputs a frequency adjustment signal 106 according to the lead lag signal 113 . The clock generator 107 outputs a clock 108 according to the frequen...

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PUM

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Abstract

The invention relates to a control device. The control device comprises a detector, a frequency adjustment signal generator, a clock generator and an output timing generator, wherein an input field reference signal is compared by the detector with an output field reference signal to determine a time difference signal, a frequency adjustment signal is outputted by the frequency adjustment signal generator according to the time difference signal, a clock is outputted by the clock generator according to the frequency adjustment signal, an output field synchronization signal is generated by the timing generator according to the clock, and the frequency of the clock is adjusted by the clock generator according to the frequency adjustment signal.

Description

technical field [0001] The present invention relates to a semiconductor device, more specifically, the present invention relates to a display controller. Background technique [0002] Displaying a movie on a monitor means that multiple frames need to be displayed within a certain period of time. Displays are often required to accept a variety of video sources, but different video sources often have different frame rates and resolutions. If the input frame rate is faster than the output frame rate, the display controller's buffer capacity will be insufficient and the frame data will be overwritten. If the output frame rate is faster than the input frame rate, the image data will be output repeatedly, resulting in image errors or unsmooth problems. Therefore, the display needs a display controller to solve the problem of smooth playback of different input and output frame rates and resolutions on the same display. Contents of the invention [0003] An object of the presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G5/00G09G5/36
CPCG09G5/00G09G5/36
Inventor 赖信丞赖誉仁陈玟妤
Owner MSTAR SEMICON INC
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