Display Control Chip OSD Customization via Segmented Memory
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Solution Overview
Problem
Traditional display devices cannot modify their on-screen display (OSD) information after leaving the factory, limiting their application scenarios.
Innovation Solution
A display control chip and system that allows customization of OSD information by receiving update data, updating text data, converting it into target images, and outputting display data to generate a customized display picture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If OSD information is built into firmware, then the display device can display OSD information without video signal source, but the OSD information cannot be modified after leaving the factory
Solution Approach 1:
The patent divides the traditional monolithic firmware into separate functional modules: a first memory storing character images, a second memory storing text data, and a computing circuit that processes and combines them. This segmentation allows the text data in the second memory to be independently updated without affecting the core firmware, enabling customization while maintaining reliable OSD display functionality.
Solution Approach 2:
The patent creates a copy mechanism where text data can be updated in the second memory without modifying the original firmware structure. The computing circuit reads text data from the second memory and combines it with character images from the first memory to generate display output, allowing customized OSD information to be copied and displayed repeatedly without altering the core system.
2Device complexity
If OSD information is fixed in firmware, then the system structure is simple, but the application scenarios are limited
Solution Approach 1:
The patent implements a universal OSD system where the computing circuit can process various text data formats and character encoding formats (such as Unicode) through the same architecture. The separated memory structures allow the system to accommodate different application scenarios by simply updating the text data in the second memory, making the display device adaptable to multiple uses including electronic bulletin boards, information displays, and traditional OSD menus without requiring different hardware configurations.
Data Source
AI summary
A display control chip includes a first memory and a computing circuit. The first memory is configured to store a plurality of character images respectively corresponds to a plurality of characters of a character encoding format. The computing circuit is coupled with the first memory, and is configured to receive first update data generated by encoding input data according to the character encoding format, and is configured to use the first update data to update text data in a second memory. When the computing circuit reads the text data in the second memory, the computing circuit is configured to: search among the plurality of character images to find a plurality of target images corresponding to the text data; and output first display data according to the plurality of target images, in which the first display data is for generating a first display picture including the plurality of target images.