Pixel Unit Voltage Oscillation for LCD Color Washout
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Solution Overview
Problem
Conventional LCD screens suffer from color washout at lateral viewing angles due to limited display quality and increased cost from requiring additional transistors in proposed solutions.
Innovation Solution
A pixel unit comprising a switch circuit and an energy accumulation circuit, where the energy accumulation circuit receives a first voltage and two voltages with a difference, generating voltage oscillation to adjust liquid crystal angles and reduce color washout without increasing cost or reducing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional solutions (capacitance coupling, com-swing, dual-TFT) are used to reduce color washout, then color washout is reduced, but device complexity increases due to requiring two additional transistors
Solution Approach 1:
The patent extracts the voltage oscillation function from the traditional transistor-based control mechanisms and implements it through an energy accumulation circuit that stores and releases voltage dynamically. This removes the need for additional transistors while achieving the same color washout reduction effect.
Solution Approach 2:
The patent replaces the mechanical/electronic transistor switching system with an energy accumulation circuit that uses capacitive energy storage and release to achieve voltage oscillation. This substitution eliminates the need for additional transistors while maintaining the desired display performance.
2Object-affected harmful factors
If additional transistors are added to reduce color washout, then color washout is reduced, but aperture ratio decreases due to increased transistor occupation area
Solution Approach 1:
The patent removes the unnecessary transistor components from the pixel structure, extracting only the essential energy accumulation function into a dedicated circuit. This reduction in component count directly increases the aperture ratio while maintaining color washout reduction capability.
Solution Approach 2:
The patent merges the voltage oscillation function with the existing energy accumulation circuit, combining multiple functions into a single integrated structure. This consolidation eliminates the need for separate transistor-based control circuits, thereby increasing the aperture ratio.
3Object-affected harmful factors
If additional transistors are used to improve display quality, then color washout is reduced, but manufacturing cost increases
Solution Approach 1:
The patent extracts the voltage oscillation function from complex transistor-based control systems and implements it through a simpler energy accumulation circuit. This simplification reduces manufacturing complexity and cost while achieving the same display quality improvement.
Solution Approach 2:
The patent replaces expensive transistor-based control mechanisms with a more economical energy accumulation circuit that uses passive components. This substitution significantly reduces manufacturing cost while maintaining the color washout reduction effect.
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
Effectively reduces color washout by generating voltage oscillation in the pixel unit, allowing liquid crystals to change angles and improve display quality without adding transistors, thus maintaining aperture ratio and display quality.
Implementation Method 1
generating voltage oscillation to adjust liquid crystal angles and reduce color washout
Data Source
AI summary
A pixel unit, a method for controlling the pixel unit, and a display apparatus having the same are provided. The display apparatus includes a driving circuit and a plurality of pixel units. Each of the pixel unit includes a switch circuit and an energy storage circuit. The energy storage circuit has a first end, a second end, and a third end. The first end is coupled to the switch circuit. The second end is electrically connected to the driving circuit so that the drive circuit is able to provide a first voltage to the second end. The third end is electrically connected to the driving circuit so that the driving circuit is able to provide a second voltage and a third voltage to the third end before the first voltage transits. There is a difference between the second voltage and the third voltage in order to generate a voltage oscillation with in the pixel unit. Therefore, the problem of color washout can be solved.