Pixel Structure Voltage Control via Discharge Device
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Solution Overview
Problem
Conventional liquid crystal display technologies face challenges in maintaining uniform display quality due to voltage fluctuations caused by charge storage in shunt capacitors, affecting viewing angles and overall display performance.
Innovation Solution
The pixel structure incorporates a discharge device coupled to both sub-pixels and charge-receiving devices, allowing for partial discharge and voltage control, with shunt capacitors configured to receive and store charge in a synchronized manner, reducing voltage fluctuations and maintaining high display quality across viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If charge is stored in shunt capacitors to maintain pixel voltage, then pixel voltage stability is improved, but voltage fluctuations affect viewing angles and display uniformity
Solution Approach 1:
The pixel structure is divided into two sub-pixels (first and second sub-pixels) with different voltage characteristics. The first sub-pixel has a smaller pixel voltage than the second sub-pixel, creating intentional asymmetry in voltage distribution. This segmentation allows each sub-pixel to be optimized for specific viewing angle requirements, resolving the contradiction between voltage stability and display uniformity.
Solution Approach 2:
Different regions of the display (different sub-pixels) are given different voltage characteristics. The first sub-pixel operates at a lower voltage while the second operates at a higher voltage, allowing each region to contribute differently to the overall display performance. This local differentiation enables wide viewing angles while maintaining voltage stability through the discharge device.
2Measurement precision
If discharge device is added to control pixel voltage, then voltage control precision is improved, but device complexity increases
Solution Approach 1:
The discharge device is integrated into the existing pixel structure and shares control signals with the thin film transistors. The control terminal of the discharge device is coupled to the gate line, allowing it to be controlled by the same scanning signals that control the pixel transistors. This merging approach enables voltage control functionality without requiring separate complex control circuits.
Solution Approach 2:
The discharge device serves multiple functions: it discharges the first pixel electrode, controls voltage distribution between sub-pixels, and maintains display uniformity. By making the discharge device multi-functional, the patent reduces the need for additional separate components, thereby controlling complexity while achieving precise voltage control.
3Ease of manufacture
If first pixel electrode voltage is reduced relative to second, then display uniformity is improved, but charge storage capacity is reduced
Solution Approach 1:
The discharge device acts as an intermediary between the first pixel electrode and the common electrode, providing a controlled discharge path. This intermediary component allows the first pixel electrode to maintain a lower voltage while still having adequate charge storage capacity, as the discharge is controlled rather than complete. The discharge device mediates the balance between voltage reduction and charge retention.
Data Source
AI summary
A pixel structure includes a first sub-pixel that includes a first thin film transistor (T1), a first common electrode (C1), and a first pixel electrode (Pix1) that is coupled to the first thin film transistor (T1); a second sub-pixel that includes a second thin film transistor (T2), a second common electrode (C2), and a second pixel electrode (Pix2) that is coupled to the second thin film transistor (T2); a discharge device that includes a control terminal, an input terminal, and an output terminal; and a gate line (GATE). The first thin film transistor (T1), the second thin film transistor (T2), and the control terminal of the discharge device are coupled to the gate line (GATE).