Backlight Control via SOC-FPGA Register Link
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Solution Overview
Problem
Current Ultra High Definition (UD) display apparatus lack an effective method for controlling backlight, which is crucial for improving display resolution and user experience, especially with the increasing complexity of image signal processing from Field-Programmable Gate Array (FPGA) panels.
Innovation Solution
A backlight control method and device that acquires and processes backlight information, writing it into a system on chip (SOC) register, obtaining adjusting data, and sending it to a field-programmable gate array (FPGA) to adjust the backlight control register value, thereby enabling precise control of the backlight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If backlight control is performed by FPGA in UD display apparatus, then the display resolution can be improved to 4K*2K, but the complexity of controlling backlight increases
Solution Approach 1:
The backlight control function is segmented from the FPGA and relocated to the SOC. The SOC contains a dedicated backlight control unit that independently manages backlight parameters, while the FPGA focuses on image signal processing. This segmentation reduces the complexity within the FPGA and improves maintainability.
Solution Approach 2:
A communication interface is introduced as an intermediary between the SOC and FPGA. The SOC writes backlight control data to a register that the FPGA reads, enabling coordinated control without direct integration. This intermediary approach simplifies the control architecture while maintaining functionality.
2Measurement precision
If the total number of pixels reaches above 8 million for UD display, then the display quality is improved, but the difficulty of detecting and measuring backlight control increases
Solution Approach 1:
The SOC autonomously manages backlight control by reading display parameters and automatically calculating appropriate backlight values. The system self-adjusts backlight intensity based on the high-resolution display requirements without external intervention, simplifying measurement and control.
3Measurement precision
If FHD image signals are converted into UD image signals by FPGA, then the display resolution is improved, but the ease of operation for backlight control is reduced
Solution Approach 1:
The backlight control functionality is extracted from the FPGA's image signal processing path and integrated into the SOC. Users can control backlight through the SOC's user interface and menu system, which is more accessible and easier to operate than controlling through the FPGA's complex signal processing interface.
Data Source
AI summary
The present invention provides a backlight control method, a backlight control device and a display apparatus. The backlight control method comprises steps of: acquiring a backlight information and writing the backlight information into a backlight register of system on chip; obtaining a backlight adjusting data based on the backlight information in the backlight register; sending the backlight adjusting data to a backlight control register of a field-programmable gate array, so that the backlight control register obtains a corresponding backlight control register value based on the backlight adjusting data; and adjusting backlight according to the backlight control register value. By correlating backlight option function in the system on chip (SOC) with the field-programmable gate array (FPGA) panel, the users can accomplish the control of the displayed backlight through the menus displayed on the display apparatus. This improves the using experience of the users.