Dual Panel LCD Gap Privacy Protection Driver Circuit
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Solution Overview
Problem
Existing liquid crystal display (LCD) systems face challenges in enhancing image contrast and providing effective privacy protection, particularly when viewed from oblique angles.
Innovation Solution
A dual panel LCD system with a gap between the display panel and the backlight panel, where a driver circuit with a privacy protection circuit generates gray scale data based on luminance to control backlight intensity, enabling adjustable contrast and privacy protection by altering the perception of images from different viewing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dual panel structure with gap is used to achieve privacy protection by blurring oblique views, then privacy protection capability is improved, but device complexity increases
Solution Approach 1:
The display system is segmented into two separate panels: a display panel and a backlight panel, with a gap between them. This segmentation enables the privacy protection function by creating spatial separation that causes light scattering at oblique angles, thereby blurring images viewed from the sides while maintaining clear visibility from the front.
Solution Approach 2:
The gap between the display panel and backlight panel acts as an intermediary space that mediates the light transmission. This intermediate space allows light to scatter and diffuse, creating the privacy protection effect by preventing direct light paths at oblique viewing angles while still allowing sufficient light transmission for normal viewing.
2Reliability
If the gap between panels is increased to enhance privacy protection effect, then privacy protection capability is improved, but illumination intensity decreases
Solution Approach 1:
The system dynamically adjusts the gray scale data output to the backlight panel based on the actual luminance measurements. This dynamic adjustment compensates for the light loss caused by the gap, maintaining adequate illumination intensity while preserving the privacy protection effect. The driver circuit modifies backlight intensity in real-time to balance privacy protection and visibility requirements.
Solution Approach 2:
The system changes the luminance parameter of the backlight panel by adjusting the gray scale data according to measured luminance levels. This parameter adjustment ensures that even with the gap reducing light transmission, the display maintains sufficient brightness and illumination intensity for acceptable image quality while retaining privacy protection capabilities.
3Manufacturing precision
If gray scale data is adjusted based on luminance for contrast enhancement, then image contrast is improved, but device complexity increases
Solution Approach 1:
The system implements a feedback mechanism where the driver circuit measures the actual luminance of the display and uses this information to adjust the gray scale data output to the backlight panel. This closed-loop feedback enables automatic contrast enhancement without requiring complex manual calibration or additional hardware components, as the system self-adjusts based on real-time luminance measurements.
Solution Approach 2:
The display system performs self-adjustment of contrast by using its own luminance output as the basis for controlling the backlight intensity. The driver circuit automatically regulates the backlight panel's gray scale data based on measured luminance, enabling the system to enhance its own image contrast without external intervention or additional complex control mechanisms.
Data Source
AI summary
A display system includes a display device and a driver circuit. The display device has a first panel and a second panel, wherein the first panel and the second panel are disposed with a gap therebetween. The driver circuit is coupled to the display device and includes a protection circuit. The protection circuit, coupled to the second panel of the display device, is configured to generate a gray scale data to be outputted to a pixel among a plurality of pixels of the second panel according to a luminance corresponding to the pixel and according to whether a protection function is enabled.