Liquid Crystal Display Driving Method for Viewing Angle Control
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Solution Overview
Problem
Liquid crystal display devices with single viewing angle modes fail to meet user needs for both wide and narrow viewing angles, particularly experiencing uneven display (mura) at large observation angles in narrow viewing angle mode, affecting user experience.
Innovation Solution
A driving method for liquid crystal display devices that alternates display brightness between odd and even frames in narrow viewing angle mode by varying driving voltages or processing image data, allowing the device to switch between wide and narrow viewing angles based on voltage differences and AC/DC voltage applications, and incorporating a detection sensor for automatic mode switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bias voltage is applied to the viewing angle control electrode to achieve narrow viewing angle mode, then the viewing angle is reduced for privacy protection, but uneven display (mura) occurs at large observation angles
Solution Approach 1:
The patent applies periodic voltage switching to the viewing angle control electrode, alternating between wide viewing angle mode (first voltage state) and narrow viewing angle mode (second voltage state) at different frame rates. This periodic action allows the display to achieve both wide and narrow viewing angle requirements without persistent mura effects, as the liquid crystal molecules are dynamically adjusted rather than fixed in one state
Solution Approach 2:
The patent dynamically adjusts the voltage applied to the viewing angle control electrode based on the displayed content and viewing conditions. By making the viewing angle mode dynamic rather than static, the system can optimize between privacy protection and display uniformity in real-time, reducing the occurrence of mura while maintaining adaptability
2Adaptability or versatility
If the viewing angle control electrode is not applied with voltage to achieve wide viewing angle mode, then the viewing angle is wide for better visibility, but privacy protection is compromised
Solution Approach 1:
The system uses periodic voltage application to the viewing angle control electrode to switch between wide viewing angle mode (when privacy is not required) and narrow viewing angle mode (when privacy is required). This allows the display to provide wide viewing angle benefits when needed while implementing privacy protection when necessary, rather than being locked into one mode
Solution Approach 2:
The patent changes the voltage parameter applied to the viewing angle control electrode to control the liquid crystal molecule orientation. By adjusting this electrical parameter, the system can switch between wide and narrow viewing angle modes, providing adaptability for different privacy requirements while maintaining good visibility when privacy protection is not needed
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
Significantly reduces mura issues and improves image quality in narrow viewing angle mode, enhancing user experience by ensuring smooth dynamic picture display and flexible viewing angle adjustments.
Implementation Method 1
the viewing angle control electrode 111 of the upper substrate 11 is applied with a voltage, the liquid crystal molecules in the liquid crystal layer 13 will tilt due to the vertical electric field E
Data Source
AI summary
A driving method for a liquid crystal display device is provided. The liquid crystal display device has a wide viewing angle mode and a narrow viewing angle mode. The driving method includes: in the wide viewing angle mode, all the frames of the liquid crystal display device have the same display brightness; in the narrow viewing angle mode, the odd frames and the even frames of the liquid crystal display device have different display brightness. In the narrow viewing angle mode of the liquid crystal display device, by using an alternate driving method of bright frames and dark frames, the mura degree is significantly reduced, and the smoothness of dynamic picture display is improved, thereby improving the use experience of users.