Display Device Driving Method for Large Viewing Angle Color Shift
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Solution Overview
Problem
Liquid crystal display devices experience significant color shift and decreased color vividness under large viewing angles due to varying driving voltages affecting phase delay and transmittance of different wavelengths, particularly impacting red images.
Innovation Solution
A driving method for display devices that acquires tone angle and saturation values in a specific color space to match a target gray-scale value group for each pixel unit, adjusting the lightness of the backlight module to optimize display effect by reducing the influence of high gray-scale values, thereby maintaining color saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high driving voltage is applied to achieve high gray-scale display, then brightness is improved, but color saturation deteriorates under large viewing angles
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the driving voltage based on gray-scale values and viewing angles. Specifically, when the viewing angle exceeds a threshold and high gray-scale values are detected, the driving voltage is reduced to compensate for color shift, thereby maintaining color saturation while preserving acceptable brightness levels
Solution Approach 2:
The patent implements dynamics by making the driving voltage adjustable and adaptive rather than fixed. The system continuously monitors viewing angle and gray-scale value, then dynamically modifies the driving voltage in real-time to optimize both brightness and color saturation under varying conditions
2Device complexity
If standard driving voltage is used for all gray-scale values, then device complexity is reduced, but display quality deteriorates under large viewing angles
Solution Approach 1:
The patent changes the driving voltage parameter based on two conditions: viewing angle magnitude and gray-scale value. By implementing conditional parameter adjustment, the system achieves high display quality under large viewing angles without requiring completely new hardware, thus balancing complexity and performance
3Ease of manufacture
If gray-scale values are reduced to maintain color saturation, then color vividness is improved, but brightness is reduced
Solution Approach 1:
The patent uses parameter changes in the form of adaptive driving voltage adjustment to decouple the relationship between gray-scale reduction and brightness loss. By modifying the voltage parameter, the system can maintain lower effective gray-scale values for color saturation while the backlight and pixel structure compensate to preserve overall brightness
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
Effectively eliminates the color shift issue under large viewing angles by matching the display gray-scale value group to a target gray-scale value group, optimizing the display effect by reducing the impact of high gray-scale values on color saturation.
Implementation Method 1
different driving voltages cause different degrees of change in phase delay of light having different wavelengths
Implementation Method 2
the influence on the transmittance of light is also different
Data Source
AI summary
A driving method of a display device and the display device, a display panel includes at least one pixel area and at least one backlight module area. The pixel area and the backlight module area are in one-to-one correspondence. Each of the pixel areas includes a plurality of pixel units. The driving method includes: acquiring a first component, a second component, and a third component of each of the pixel units in the pixel area in a first color space; acquiring a tone angle value and a saturation in a second color space according to an average value of the first component, an average value of the second component, and an average value of the third component of the pixel unit in the pixel area; acquiring a maximum target gray-scale value of a specified pixel unit in the pixel area according to the tone angle value and the saturation; matching a display gray-scale value group corresponding to the specified pixel unit to a target gray-scale value group according to the maximum target gray-scale value; the number of gray-scale values in the display gray-scale value group is equal to the number of gray-scale values in the target gray-scale value group, the maximum target gray-scale value is less than a maximum display gray-scale value in the display gray-scale value group; and driving the specified pixel unit in the pixel area to display according to the target gray-scale value group.