Liquid Crystal Display Image Depth Gamma Correction
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Solution Overview
Problem
Liquid crystal display devices face reduced luminance and aperture ratio due to dividing pixels into sub-pixels to improve side surface visibility, leading to poorer side surface visibility compared to front surface visibility.
Innovation Solution
An image signal processing method that analyzes image depths and applies composite gamma correction selectively to pixels, using different gamma curves for foreground and background image signals to enhance side surface visibility without compromising luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If pixels are divided into sub-pixels to improve side surface visibility, then side surface visibility is improved, but aperture ratio is decreased and luminance is reduced
Solution Approach 1:
The patent applies different gamma correction values to different depth regions of the image. Foreground objects (closer to viewer) use one gamma correction value while background objects (farther from viewer) use another gamma correction value. This local differentiation of correction parameters improves side surface visibility without requiring physical pixel division, thereby maintaining aperture ratio and luminance.
2Object-affected harmful factors
If pixels are divided into sub-pixels to improve side surface visibility, then side surface visibility is improved, but aperture ratio is decreased
Solution Approach 1:
The patent changes the gamma correction parameter based on image depth analysis. By analyzing the depth information of different regions in the image and applying appropriate gamma correction values, the system achieves improved side surface visibility without modifying the physical structure of pixels, thus maintaining the aperture ratio.
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
Improves side surface visibility of liquid crystal display devices by selectively applying gamma correction based on image depth analysis, maintaining or improving luminance levels.
Implementation Method 1
Electric fields are generated in the liquid crystal layer by applying voltages to the pixel electrodes and the counter electrodes, and a desired image is acquired by controlling transmission rates of light via the liquid crystal layer through control of strengths of the electric fields
Implementation Method 2
a liquid crystal layer configured to be disposed between the two display panels, and to have dielectric anisotropy
Data Source
AI summary
A display device includes a substrate, a plurality of gate lines disposed on the substrate, and which extends in first direction, a plurality of data lines disposed on the substrate, and which extends in a second direction intersecting the first direction, pixels connected to the gate lines and the data lines, a data drive unit which applies data signals to the data lines, a gate drive unit which supplies gate signals to the gate lines, a timing controller which controls the data signals and the gate signals, an image depth analysis unit which receives an image signal, and generates a foreground image signal based on an image depth of the image signal, and a gamma correction unit which generates a gamma-corrected image signal by applying a plurality of gamma curves to the foreground image signal.