Digital OSD controller based on FRGA

A controller and microcontroller technology, applied in the direction of instruments, static indicators, etc., can solve the problem of not being able to randomly change the OSD image, etc., and achieve the effect of flexible display and adjustment, reducing complexity and reducing costs.

Inactive Publication Date: 2005-12-28
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent only uses the character (map) library (FROM) in the OSD processing unit to generate OSD images, and cannot generate OSD images that change arbitrarily

Method used

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  • Digital OSD controller based on FRGA
  • Digital OSD controller based on FRGA
  • Digital OSD controller based on FRGA

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Embodiment Construction

[0039] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0040] see figure 1 , in this embodiment, the design goal of the digital OSD controller based on FPGA is to generate user-defined OSD digital images, and make it possible to superimpose with digitized, high-speed original video image data streams to form new digital images, However, since the video image is constantly being refreshed, the OSD image needs to prepare the RGB values ​​of the pixels when the OSD image scans its area and corresponding pixels in time sequence, and these data are organized in the form of memory. Note that it is not simply stored in memory as an image.

[0041] figure 2 shown based on characters and image 3 The two OSD image synthesis modules based on the bitmap shown respectively adopt different memory configuration schemes.

[0042] figure 2 It is an implementation example of the memory configuration principle of th...

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Abstract

A digital OSD controller based on FPGA consists of character processing module, variable bit map processing module, MCU interface module of micro-controller, synthetic module of OSD image color and feature as well as OSD management module. It is featured as using three different storages to synthesize scan time sequence and signal stream for overlapping them with original image at output end then displaying OSD menu image with variable size, variable character, etc on LCD.

Description

Technical field: [0001] The invention relates to an OSD (On Screen Display, screen display) controller, in particular to an OSD controller which provides digital OSD images for a liquid crystal display (LCD) and is implemented with a field programmable gate array (FPGA). Background technique: [0002] OSD is a function that all kinds of monitors must have. It provides users with character or image information to adjust the parameters of the monitor, which is convenient for users to adjust the monitor. In addition, special image information can be superimposed on the original video image. The OSD controller is the system that performs this function. [0003] The screen display circuit designed by Tian Rizhen is used in a display system for displaying analog interlaced video signals ("Screen Display Circuit for Video Display Equipment", Chinese Patent, Publication No. 1139334, 1997.1.1). But it cannot be used for LCD, because what LCD receives is a digital progressive scan v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
Inventor 盛磊徐科军
Owner HEFEI UNIV OF TECH
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