Display Backlight Color Shift Correction via Saturation Feedback
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Solution Overview
Problem
Liquid crystal display (LCD) panels experience significant color shift at large viewing angles due to the saturation loss when adjusting signal saturation to mitigate color shift issues, leading to compromised image quality and color purity.
Innovation Solution
A driving method and system for a display assembly that synchronously adjusts the brightness of independently controlled light sources in the backlight module based on saturation signals, using a preset adjustment coefficient to maintain color purity while reducing color shift, by determining a minimum color light source and adjusting its brightness to restore the original saturated color point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If signal saturation is adjusted to mitigate color shift, then color shift is reduced, but color purity and image quality deteriorate
Solution Approach 1:
The invention divides the backlight module into multiple independently controllable light source regions (first, second, and third color light sources). Each region can be adjusted independently to compensate for color shift in specific areas without affecting the overall color purity of the display panel.
Solution Approach 2:
The patent applies different brightness adjustment strategies to different color light sources based on local needs. The minimum color light source is identified and adjusted specifically to restore saturated color points in regions experiencing color shift, rather than uniformly adjusting all light sources.
2Adaptability or versatility
If saturation adjustment coefficient is applied to reduce color shift, then viewing angle performance improves, but color signal accuracy deteriorates
Solution Approach 1:
The system uses saturation signals as feedback to identify when and where color shift occurs. Based on this feedback, the minimum color light source is selectively adjusted to restore the original saturated color point, ensuring color signal accuracy is maintained while improving viewing angle performance.
Solution Approach 2:
The patent dynamically changes the brightness parameter of the minimum color light source based on saturation signal analysis. By adjusting only the necessary light source parameters rather than all parameters uniformly, color signal accuracy is preserved while correcting viewing angle issues.
Data Source
AI summary
The present application discloses a driving method and driving system of a driving module, and a display device. A driving process of the display panel includes: receiving a first color signal and converting it into a first HSV (hue, saturation, value) spatial signal; adjusting a first saturation signal to obtain a second saturation signal; using a second color signal converted from the second saturation signal to drive the display panel. A driving process of the backlight module includes: receiving the first color signal to obtain a light source adjustment coefficient; determining the minimum color light source and using the light source adjustment coefficient to adjust the minimum color light source to obtain a fourth brightness value; driving the minimum color light source using the fourth brightness value.