Backlight Control via Display Identifier Lookup
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Solution Overview
Problem
The complexity in designing a bill of materials (BOM) for electronic apparatuses with multiple displays having different electrical characteristics complicates the backlight power circuit layout, prolonging the production process and increasing manufacturing costs, as existing digital control methods rely on a display controller that is not universally applicable.
Innovation Solution
An electronic apparatus with a processing unit, read-only memory, and backlight controller, where the BIOS executes to identify display identifiers and retrieve corresponding backlight settings from a setting table, allowing digital communication to control backlight power directly through internal resources without additional cost or complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If digital control method using display controller is used, then backlight setting can be adjusted, but additional cost and system requirements are incurred
Solution Approach 1:
The backlight controller directly reads backlight setting values from the setting table in read-only memory without requiring a display controller. The system serves itself by utilizing internal resources (processing unit, read-only memory, backlight controller) to accomplish backlight adjustment, eliminating the need for additional display controller hardware
Solution Approach 2:
The processing unit performs multiple functions: it executes BIOS, identifies display identifiers, retrieves backlight setting values from the setting table, and communicates with the backlight controller. This multi-functionality eliminates the need for dedicated display controller hardware while achieving the same backlight adjustment capability
2Adaptability or versatility
If BOM is adjusted for each display with different electrical characteristics, then backlight settings can be customized, but design complexity and production time increase
Solution Approach 1:
The setting table stores multiple sets of backlight setting values corresponding to different display electrical characteristics. The processing unit retrieves the appropriate set by matching the display identifier, allowing customization of backlight parameters (such as current, voltage, or brightness levels) without changing the physical BOM or circuit layout
Solution Approach 2:
Instead of creating separate BOMs for each display type, the patent creates a digital copy of all possible backlight setting values in the setting table. The system then selects and applies the appropriate copy based on the displayed identifier, eliminating the need for multiple physical BOM designs
Data Source
AI summary
An electronic apparatus and a display backlight control method are provided. The electronic apparatus includes a display, a processing unit, a read-only memory and a backlight controller. The read-only memory stores a basic input output system (BIOS) and a setting table. The setting table includes a plurality of backlight setting values corresponding to each of the displays. When the processing unit executes the BIOS, the processing unit identifies an identifier corresponding to the display connected to the electronic apparatus, so as to obtain the backlight setting values corresponding to the display according to the identifier and the setting table. Then the processing unit provides the backlight setting values to the backlight controller, and the backlight controller controls the backlight power of the display according to the backlight setting values.