Liquid Crystal Panel With Alternating Voltages for Wide-Angle Light Shielding
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Solution Overview
Problem
Existing display devices struggle to maintain high light shielding performance when viewed from angles deviating from the front, particularly from above or below, due to limitations in light shielding angle design and voltage application.
Innovation Solution
A liquid crystal panel with a voltage control unit that alternately applies first and second voltages of different absolute values between electrodes, allowing for improved light shielding performance across various viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a liquid crystal panel applies a single voltage to control light shielding, then the light shielding property can be optimized for a specific viewing angle, but the light shielding performance deteriorates when viewed from other angles (particularly from above or below)
Solution Approach 1:
The patent applies periodic voltage switching between two different voltage levels (first voltage and second voltage) to the liquid crystal panel. By alternately switching between these voltages, the system achieves different light shielding states that maintain effective light shielding across multiple viewing angles, particularly solving the problem of performance deterioration when viewed from above or below the screen.
Solution Approach 2:
The patent changes the voltage parameter applied to the liquid crystal panel by using two distinct voltage levels with different absolute values. This parameter change enables the liquid crystal molecules to adopt different alignment states, thereby optimizing light shielding performance for different viewing conditions and maintaining consistent performance across various angles.
2Object-affected harmful factors
If the light shielding angle is designed for optimal front viewing, then high light shielding is achieved in the horizontal direction, but the light shielding property deteriorates when observed from above or below the screen
Solution Approach 1:
By periodically switching between first and second voltages, the system maintains reliable light shielding performance across different viewing angles. The periodic voltage application ensures that the liquid crystal panel adapts to maintain light shielding effectiveness whether viewed from the front, above, or below, thus improving reliability across viewing conditions.
Solution Approach 2:
The patent introduces dynamic voltage control by alternately applying two different voltages, allowing the liquid crystal panel to dynamically adjust its light shielding characteristics. This dynamic approach ensures consistent light shielding performance across various viewing angles, making the system adaptable rather than static.
3Object-affected harmful factors
If a louver film is used to control viewing angle, then light shielding in oblique directions is enhanced, but visibility in the oblique direction itself is reduced
Solution Approach 1:
Instead of using a fixed geometric structure like a louver film, the patent changes the optical parameter of the liquid crystal panel by applying two different voltages. This allows the panel to control light shielding in oblique directions while maintaining visibility, as the voltage-controlled liquid crystal alignment can modulate light transmission dynamically without the geometric limitations of physical louvers.
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 effectively suppresses light shielding property deterioration in the horizontal direction when viewed from above or below the screen, ensuring consistent high light shielding performance regardless of the viewing angle.
Implementation Method 1
a liquid crystal layer that is located between the first substrate and the second substrate and contains liquid crystal molecules... changing the alignment state of liquid crystal molecules in the liquid crystal composition according to the applied voltage
Implementation Method 2
applies a voltage to the liquid crystal layer and changing the alignment state of liquid crystal molecules in the liquid crystal composition according to the applied voltage
Data Source
AI summary
A liquid crystal panel includes a first substrate, a second substrate disposed to face the first substrate, a liquid crystal layer that is located between the first substrate and the second substrate and contains liquid crystal molecules, a pair of electrodes that apply a voltage to the liquid crystal layer, and a voltage control unit that performs control to alternately apply a first voltage having a first absolute value and a second voltage having a second absolute value different from the first absolute value between the pair of electrodes.