LED Backlight Control for Display Adaptability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal display devices have complex circuit configurations and high power consumption due to the need to adjust the number and positions of LED light sources based on the display range and position of the image, which complicates control and increases energy usage.
Innovation Solution
A display device with a lighting system that includes light sources arrayed at intervals and specific wiring connections, where the light source control unit energizes more wiring portions for normal images and fewer for smaller images, allowing for efficient light distribution and reduced power consumption by selectively activating only the necessary light sources based on the image type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number and positions of LED light sources are adjusted based on display range and position, then display adaptability is improved, but circuit configuration complexity increases
Solution Approach 1:
The backlight unit is divided into multiple independently controllable regions corresponding to different LED light source groups. Each region can be selectively activated based on the display requirements (full-screen or small window mode), allowing the system to adapt to different display scenarios without requiring complex dynamic reconfiguration of the entire circuit.
Solution Approach 2:
The system dynamically switches between different lighting configurations (full-screen lighting or localized lighting) based on the type of image being displayed. This dynamic adaptation allows the display to optimize power consumption and circuit utilization without requiring permanent complex circuitry for all possible display scenarios.
2Adaptability or versatility
If the number and positions of LED light sources are adjusted based on display range and position, then display adaptability is improved, but control complexity increases
Solution Approach 1:
The control system is segmented into distinct control paths for different display modes. The control unit receives display type information and selectively activates appropriate control routines (full-screen control or localized control), simplifying the overall control logic by avoiding the need to manage all possible light source configurations simultaneously.
Solution Approach 2:
The control system dynamically adapts its behavior based on the display type. For small window displays, it activates only the necessary LED groups; for full-screen displays, it activates all LED groups. This dynamic control strategy reduces control complexity compared to a system that must continuously adjust individual light source positions and intensities.
3Illumination intensity
If more LED light sources are turned on, then display quality is improved, but power consumption increases
Solution Approach 1:
The lighting system applies local quality by activating different numbers of LED light sources based on the display requirements. For small window displays, only the LED groups corresponding to the window region are activated, providing sufficient illumination for that area while leaving other regions dark. For full-screen displays, all LED groups are activated to provide uniform illumination across the entire display area.
Solution Approach 2:
The system uses partial action by activating only the necessary portion of LED light sources based on the display type. Instead of always activating all LEDs regardless of display content, the system activates only the minimum required number of LEDs to achieve acceptable display quality for the current display scenario, thereby reducing overall power consumption.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution simplifies the circuit configuration and reduces power consumption by optimizing light source usage, improving display quality and adaptability to varying image sizes and positions while minimizing energy expenditure.
Implementation Method 1
a lighting device that supplies light to the display panel for displaying, the lighting device at least including light sources arrayed at intervals
Data Source
AI summary
A liquid crystal display device includes a liquid crystal panel, a backlight device at least including LEDs arrayed at intervals and LED wiring portions connected to the LEDs such that the LEDs adjacent to one another have different connection targets, an image signal generation unit that generates an image signal related to the image, a panel control unit that displays the image on the liquid crystal panel based on the image signal generated in the image signal generation unit, and an LED control unit that energizes a relatively great amount of the LED wiring portions when the image based on the image signal sent from the image signal generation unit is a normal image, and selectively energizes a relatively small amount of the LED wiring portions when the image is a small image of which a display range is smaller than a display range of the normal image.