RGBW Display Data Line Sharing for Light Transmittance
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Solution Overview
Problem
In RGBW display devices, the presence of separate data lines for each sub pixel negatively affects light transmittance, leading to increased power consumption and cost due to reduced luminous efficiency.
Innovation Solution
A display device configuration where three adjacent pixels share a data line, with the fourth color sub pixel divided into blocks connected through transparent pixel electrodes, reducing the number of data lines and improving light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If each sub pixel is driven by a separate data line, then the control precision of each sub pixel is improved, but the light transmittance of the display device deteriorates
Solution Approach 1:
The patent merges the data line control for the fourth color sub pixel with adjacent color sub pixels. Specifically, the data line that originally would control only the fourth color sub pixel is shared with adjacent first, second, or third color sub pixels from neighboring pixels, reducing the total number of data lines and improving light transmittance while maintaining control capability through coordinated gating.
Solution Approach 2:
The data lines are designed to serve multiple functions by being shared across different sub pixels. A single data line controls multiple sub pixels (both fourth color and adjacent color sub pixels), making the data line structure universal and reducing the overall complexity of the wiring while maintaining individual sub pixel control through the pixel electrode connection mechanism.
2Illumination intensity
If the number of data lines is reduced, then the light transmittance is improved, but the device complexity increases
Solution Approach 1:
The fourth color sub pixel is segmented into multiple blocks (first, second, third fourth color sub pixel blocks) that are spatially separated and connected through pixel electrodes. This segmentation allows each block to be controlled independently through shared data lines while maintaining the overall functionality of the fourth color sub pixel, reducing the need for separate dedicated data lines for each block.
Solution Approach 2:
Pixel electrodes serve as intermediaries that connect the shared data lines to multiple sub pixel blocks. The pixel electrodes enable the data signal to be distributed to different sub pixel blocks (including both fourth color and adjacent color sub pixels) without requiring separate data lines for each, thereby simplifying the data line structure while maintaining control capability.
3Loss of energy
If RGBW sub pixels are used, then the luminous efficiency is improved, but the power consumption increases
Solution Approach 1:
The patent employs periodic action by using gate lines to control the timing of signal input to different sub pixel groups. The display is divided into pixel units with different gate line activation sequences, allowing controlled switching between different sub pixel configurations (including white sub pixels for higher luminance and colored sub pixels for color display), thereby optimizing the balance between luminous efficiency and power consumption through time-multiplexed operation.
Data Source
AI summary
A display device and a method for driving the display device are provided, which pertain to the technical field of display, and can reduce the negative influence of data lines in a RGBW display device on the light transmittance. The display device comprises a display panel having a plurality of pixel units arranged as an array. Each of the pixel units comprises three adjacent pixels located in the same column, and each of the pixels comprises a first color sub pixel, a second color sub pixel, a third color sub pixel, and a fourth color sub pixel. In each of the pixel units, the three fourth color sub pixels each share a corresponding data line with a first color sub pixel, a second color sub pixel and a third color sub pixel respectively of different pixels. The present disclosure can be applied to display devices, such as liquid crystal television, liquid crystal display device, mobile phone, and tablet PC, etc.