Display Module Driving Method for Wide-Angle Color Deviation
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Solution Overview
Problem
Large-size liquid crystal display panels, especially Vertical Alignment (VA) LCD panels, suffer from severe color deviation and reduced color saturation when viewed from wide angles due to rapid brightness saturation with voltage, leading to poor image quality.
Innovation Solution
A driving method for a display module that converts RGB color signals into HSV color space signals, adjusts color saturation using predetermined coefficients, and adjusts light source intensity to compensate for color deviation, ensuring balanced color performance across different viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the backlight intensity is increased to improve color saturation, then color saturation is improved, but color deviation worsens due to rapid brightness saturation with voltage
Solution Approach 1:
The patent segments the backlight system into multiple color light sources (red, green, blue) that can be independently controlled. By adjusting the intensity of each color light source separately based on the displayed content, the system achieves high color saturation without causing color deviation, as each color channel is optimized independently rather than increasing overall backlight intensity.
Solution Approach 2:
The patent implements dynamic adjustment of backlight intensity where the brightness of color light sources changes in real-time according to the displayed content's color characteristics. This dynamic control allows the system to maintain optimal color saturation and avoid color deviation by adapting the backlight intensity to the specific imaging requirements rather than using a fixed high intensity.
2Illumination intensity
If the overall backlight intensity is increased to compensate for color saturation loss, then color saturation is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the intensity of color light sources based on the actual imaging needs and color characteristics of the displayed content. This ensures that power is consumed only when and where needed to maintain color saturation, rather than continuously operating at high intensity, thereby reducing overall power consumption while preserving color quality.
Solution Approach 2:
The patent applies different intensity levels to different color light sources based on the local color requirements of the displayed image. By adjusting only the specific color channels that need enhancement rather than increasing overall backlight intensity, the system achieves improved color saturation with minimal additional power consumption.
3Illumination intensity
If the backlight intensity is adjusted to improve color performance, then color saturation is improved, but light transmittance decreases
Solution Approach 1:
The patent segments the backlight into multiple color light sources with independent intensity control. This allows the system to adjust only specific color channels to improve color saturation without increasing the overall backlight intensity that would reduce light transmittance, thereby maintaining both color performance and light transmission efficiency.
Data Source
AI summary
The present disclosure provides a driving method of a display module, a driving system thereof, and a display device. The driving method of the display module includes a display panel driving process, and a backlight module driving process driven synchronously with the display panel driving process. The display panel driving process includes steps: performing a color saturation adjustment; and obtaining second color signals to drive the display panel by converting. The backlight module driving process includes steps: using the light source adjustment coefficient to adjust a first brightness value to obtain a second brightness value; determining a dominant hue light source; and driving the dominant hue light source by the second brightness value.