LCD Timing Controller Color Temperature Compensation
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Solution Overview
Problem
Liquid crystal display devices face issues with color temperature fluctuations due to shifts in gray scale during video data modulation, leading to suboptimal color temperature matching between the LCD module and the host computer.
Innovation Solution
A liquid crystal display device with a timing controller that modulates and compensates the color temperature of digital video data at the host computer level, ensuring that color temperature compensation occurs before data is sent to the data driving circuit, thereby preventing shifts during modulation processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the host computer tunes the color temperature of video data, then the color temperature is optimized, but the color temperature becomes mismatched after data modulation in the LCD module
Solution Approach 1:
The patent divides the color temperature compensation function into two separate locations: the host computer performs initial color temperature tuning, and the LCD module's timing controller performs additional compensation. This segmentation allows each component to contribute to the overall color accuracy without interfering with the other's primary function.
Solution Approach 2:
The timing controller in the LCD module performs color temperature compensation in advance, before the data is displayed. By pre-compensating for the gray scale shift that will occur during modulation, the system ensures that the final displayed color temperature matches the host computer's tuned values.
2Productivity
If video data is modulated in the LCD module, then the data is processed for display, but the gray scale shifts causing color temperature fluctuation
Solution Approach 1:
The patent implements a feedback mechanism where the timing controller monitors the gray scale shifts occurring during data modulation and automatically adjusts the color temperature compensation parameters accordingly. This closed-loop approach ensures that color temperature stability is maintained despite ongoing data processing and modulation activities.
3Adaptability or versatility
If additional data modulating circuit is added to LCD module, then data modulation capability is improved, but color temperature matching becomes more difficult
Solution Approach 1:
The timing controller in the LCD module is designed to perform multiple functions: it controls the operating timings of driving circuits, processes timing signals from the host computer, and simultaneously performs color temperature compensation. This multi-functionality eliminates the need for separate dedicated color temperature control circuits, thereby reducing overall system complexity while maintaining full data modulation capability.
Data Source
AI summary
Disclosed is a liquid crystal display device and a method for compensating the color temperature of the liquid crystal display device. The timing controller according to the present disclosure, modulates the digital video data input from the host computer, compensates the shifted color temperature caused during the data modulation, and then sends the modulated and compensated digital video data to the data driving circuit.