Backlight System Flexible LED Driving Order Control
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Solution Overview
Problem
Existing backlight systems for display devices lack flexibility in designing the driving order of LEDs, which restricts the freedom in designing the backlight system and can lead to suboptimal image quality and contrast ratios.
Innovation Solution
A backlight system that includes multiple pixel ICs connected in series, where each pixel IC controls a group of LEDs and receives a data signal from a driver IC, allowing for independent control of LED turn-on and turn-off based on specific control data, enabling flexible driving orders and improved design freedom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed driving order of LEDs is used in existing backlight systems, then the system structure is simple, but the design freedom is restricted and image quality cannot be optimized
Solution Approach 1:
The patent implements a dynamic driving order system where the sequence in which pixel ICs drive their associated LEDs can be changed based on different display content requirements. The controller can dynamically adjust the driving order of pixel ICs to optimize image quality for different types of content (e.g., grayscale images, color images, high-contrast scenes), transforming a static fixed-order system into a flexible dynamic system that adapts to varying display needs.
Solution Approach 2:
The patent changes the operational parameter of LED driving order by introducing controllable variables. Different driving orders (e.g., sequential order, reverse order, grouped order) can be selected and applied based on the display content characteristics. This parameter change enables the system to optimize contrast ratios and image quality without fundamentally altering the hardware architecture, resolving the contradiction between flexibility and complexity.
2Manufacturing precision
If multiple pixel ICs are used to independently drive LEDs, then image quality and contrast ratio can be improved, but the complexity of controlling the driving order increases
Solution Approach 1:
The patent introduces a controller as an intermediary between the data source and the multiple pixel ICs. This controller manages the complex task of coordinating different driving orders for different pixel ICs, translating display content requirements into appropriate driving sequences. By centralizing the control logic in the controller, the complexity of managing multiple pixel ICs with variable driving orders is isolated from the pixel ICs themselves, maintaining image quality while managing control complexity.
Solution Approach 2:
The patent segments the control function by allowing each pixel IC to operate independently with its own configurable driving order. Each pixel IC can be assigned a specific driving sequence (first order, second order, etc.) based on its position and the display content requirements. This segmentation enables precise control over LED activation sequences to optimize image quality while distributing control complexity across multiple independent units rather than requiring centralized management of all LEDs simultaneously.
Data Source
AI summary
A backlight system includes a plurality of pixel ICs respectively including a plurality of channels connected to a plurality of LEDs and that control the LEDs to be turned on and off through the channels, and a driver IC connected to the pixel ICs and that supplies a data signal to each of the pixel ICs. The pixel ICs include a first pixel IC connected to first LEDs and a second pixel IC connected to second LEDs. The first pixel IC turns the first LEDs on or off in a first order based on first control data included in the data signal, and the second pixel IC turns the second LEDs on or off in a second order different from the first order based on second control data included in the data signal.