Charge Share Gate Lines for Wide Viewing Angle Displays
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Solution Overview
Problem
Active matrix type display devices, such as LCDs, face challenges in achieving a wide viewing angle without increasing the number of driving wires, which leads to higher manufacturing costs due to increased gate and data wires, reducing the aperture ratio and requiring more driving circuits.
Innovation Solution
The display device employs a configuration with gate lines, charge share gate lines, and data lines arranged in a specific manner, utilizing switching elements and a gate driver that applies non-overlapping gate signals to sub-pixels, allowing for wide viewing angles without additional driving wires by using charge share capacitors and dummy pixel rows to manage signal overlap and impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If each sub-pixel is connected to different data column wiring or gate row wiring to apply different data voltages, then the viewing angle is widened, but the number of gate wires and data wires is increased
Solution Approach 1:
The patent merges the gate line and charge share gate line into a unified driving structure where the gate driver simultaneously controls both lines with coordinated signals. This combining approach allows the system to achieve wide viewing angle functionality without proportionally increasing the number of separate driving wires, as the gate and charge share gate functions are integrated into a single driving architecture.
Solution Approach 2:
The patent segments the pixel structure into sub-pixels with different switching elements (first and second switching elements) that can be independently controlled. This segmentation allows different data voltages to be applied to different sub-pixels for wide viewing angle, while the segmentation is managed through the existing gate line and charge share gate line infrastructure without requiring additional driving wires.
2Illumination intensity
If the number of gate wires and data wires is increased, then the viewing angle is widened, but the aperture ratio of each pixel is decreased
Solution Approach 1:
The gate line and charge share gate line serve multiple functions: the gate line controls the first switching element while the charge share gate line controls the second switching element. Both lines are driven by the same gate driver with coordinated signals, allowing the system to maintain wide viewing angle capability without requiring separate dedicated wires for each function, thereby preserving aperture ratio.
3Illumination intensity
If the number of driving circuits is increased, then the viewing angle is widened, but the manufacturing costs are increased
Solution Approach 1:
The patent combines the driving of gate lines and charge share gate lines into a single gate driver circuit that outputs coordinated gate signals for both lines. This merging of driving functions into one circuit reduces the overall number of driving circuits required, thereby lowering manufacturing costs while still enabling wide viewing angle through the coordinated control of multiple switching elements.
Data Source
AI summary
A display device includes a plurality of gate lines arranged substantially parallel to each other in a first direction; a plurality of charge share gate lines arranged substantially parallel to each other in the first direction; a plurality of data lines arranged substantially parallel to each other in a second direction, wherein the second direction is substantially perpendicular to the first direction; and a plurality of pixels arranged in a matrix form in along the first direction and the second direction and each of the plurality of pixels which includes a first switching element and a second switching element, wherein the a first gate line of the plurality of gate lines is electrically connected to the first switching element included in one individual pixel of the plurality of pixels, and the a second gate line of the plurality of gate lines is electrically connected to the second switching element included in the individual pixel of the plurality of pixels.