Display Subpixel Gamma Control for Lateral Visibility
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Solution Overview
Problem
Liquid crystal displays face challenges in achieving side visibility comparable to front visibility, with existing methods complicating the manufacturing process and potentially deteriorating transmittance by requiring additional signal lines, switching elements, and patterns, which can lead to reduced display quality and unclear gray expression.
Innovation Solution
A display device with a configuration of multiple subpixels connected to gate and data lines, including storage capacitors and storage lines that change voltage levels, allowing for different gamma curves to be applied to each subpixel, simplifying the manufacturing process while improving transmittance and lateral visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If one pixel is divided into two subpixels with different voltages to improve side visibility, then lateral visibility is improved, but the manufacturing process becomes complicated and transmittance is deteriorated
Solution Approach 1:
The patent merges the functions of multiple signal lines by using a single data line to supply data voltages to multiple subpixels with different gamma curves. The gate line is also utilized to control multiple switching elements that drive different subpixels. This consolidation eliminates the need for additional signal lines while maintaining the capability to display different gamma curves for improved lateral visibility.
Solution Approach 2:
The gate line and data line are designed to serve multiple functions: the gate line controls switching elements for different subpixels, and the data line supplies data voltages corresponding to different gamma curves. This multi-functionality reduces the number of dedicated signal lines needed while achieving the goal of improved side visibility through differentiated subpixel voltages.
2Illumination intensity
If additional signal lines or transformation means are added to supply different gamma curve voltages to subpixels, then lateral visibility is improved, but transmittance is deteriorated due to narrower opening
Solution Approach 1:
The patent merges the functions of multiple signal lines by using a single data line to supply data voltages to multiple subpixels with different gamma curves. The gate line is also utilized to control multiple switching elements that drive different subpixels. This consolidation eliminates the need for additional signal lines while maintaining the capability to display different gamma curves for improved lateral visibility.
3Illumination intensity
If additional switching elements or patterns are added to transform voltages for subpixels, then lateral visibility is improved, but manufacturing complexity increases
Solution Approach 1:
The gate line and data line are designed to serve multiple functions: the gate line controls switching elements for different subpixels, and the data line supplies data voltages corresponding to different gamma curves. This multi-functionality reduces the number of dedicated signal lines needed while achieving the goal of improved side visibility through differentiated subpixel voltages.
4Illumination intensity
If luminance is increased in low gray or high gray to improve side visibility, then lateral visibility is improved, but gray expression becomes difficult and display quality deteriorates
Solution Approach 1:
The patent applies different gamma curves to different subpixels within the same pixel, allowing each subpixel to have optimized luminance characteristics for its specific function. This local differentiation enables one subpixel to maintain higher luminance for side visibility while another subpixel maintains accurate gray expression, resolving the contradiction between lateral visibility and gray accuracy.
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
The solution enhances display quality by simplifying the manufacturing process, improving transmittance, and clarifying gray expression changes, thereby approaching front visibility from the side while maintaining high image quality without the need for additional patterns or switching elements.
Implementation Method 1
a liquid crystal layer disposed therebetween and having dielectric anisotropy. The pixel electrodes are arranged in a matrix type and are connected to switching elements such as a thin film transistor (TFT), and the like, and sequentially receive a data voltage row-by-row. The opposed electrodes are formed over the display panel and are applied with a common voltage (Vcom). A voltage applied to the pixel electrodes and the opposed electrodes generates an electric field in the liquid crystal layer, and the strength of the electric field is controlled to control transmittance of light transmitting through the liquid crystal layer
Data Source
AI summary
A display device includes a first pixel connected to a gate line, a data line, and a storage line for transmitting a storage signal of which a voltage level is changed at least once for one frame. The first pixel includes first, second, and third subpixels. The first subpixel includes a first switching element connected to the gate and data lines, a first liquid crystal capacitor connected to the first switching element, and a first storage capacitor. The second subpixel includes a second switching element connected to the gate and data lines, a second liquid crystal capacitor connected to the second switching element, and a second storage capacitor. The third subpixel includes a third switching element connected to the gate and data lines, and a third liquid crystal capacitor connected to the third switching element. The first and second storage capacitors are connected to the storage line.