3D Display Panel Segmented Backlight Brightness Control
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Solution Overview
Problem
Current 3D display technologies, particularly temporal differentiation, face challenges in achieving high brightness due to the limited time LCDs require to achieve a stable state, leading to insufficient image brightness and increased power consumption.
Innovation Solution
The display panel is divided into multiple regions, allowing light sources to turn on after each region's response time without waiting for others, and turning off after a predetermined period, optimizing the ON time of light sources to increase brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the backlight waits for the entire display panel to finish updating before turning on, then image quality is maintained, but the light source ON time is reduced to about 1.3ms per frame, resulting in insufficient brightness
Solution Approach 1:
The display panel is divided into multiple independent display regions (e.g., four regions), each with its own corresponding backlight region. This segmentation allows different parts of the backlight to operate independently at different times, enabling the overall backlight duty cycle to increase while maintaining proper image display timing for each region.
Solution Approach 2:
The backlight operates in periodic cycles where different display regions are illuminated sequentially. Each backlight region turns on after its corresponding display region finishes updating and remains on for a predetermined period (e.g., 3.55ms), creating a periodic illumination pattern that increases the average brightness while respecting the liquid crystal response requirements of each region.
2Illumination intensity
If high power light sources are used to provide needed brightness within short time, then brightness requirement is met, but power consumption increases
Solution Approach 1:
By segmenting the display panel into multiple regions and illuminating them sequentially with corresponding backlight regions, the backlight system maintains continuous useful action across the entire display. While individual regions are illuminated for limited times, the overall system achieves higher effective brightness through continuous sequential operation, reducing the need for excessively high power individual light sources.
3Stability of the object's composition
If the entire display panel waits for liquid crystals to settle before backlight turns on, then stable image is achieved, but the frame time for left and right eye signals is only 8.3ms each, limiting brightness potential
Solution Approach 1:
The display panel is divided into multiple display regions that can be updated and stabilized independently. This allows the backlight to turn on region-by-region as each region completes its liquid crystal settling, rather than waiting for the entire panel. This segmentation enables higher brightness efficiency by utilizing the full frame time across all regions through sequential illumination.
Solution Approach 2:
The image signal is sent to control each display region before the corresponding backlight region turns on. This preliminary action ensures that each display region has sufficient time to complete its liquid crystal response and stabilization before being illuminated, guaranteeing stable image quality while maximizing the subsequent backlight illumination duration.
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
This approach significantly increases the utility rate of light sources, enhancing image brightness by approximately three times compared to prior art, while reducing power consumption and allowing the use of slower liquid crystals.
Implementation Method 1
the light source 22 is ON, the light rays emitted from the light source 22 will be incident upon the micro-lens 5 through total reflection in the light guide panel 23
Implementation Method 2
one side of the micro-lens 5 comprises a plurality of arced faces, and an opposing side of the micro-lens 5 comprises a plurality of corresponding refractive faces shaped like a row of saw teeth
Data Source
AI summary
In a 3D display having a plurality of display regions and corresponding backlight regions, the image data is sequentially sent to the display regions. The respective light source(s) of the corresponding backlight region is/are turned ON after a response time of each display region, without waiting for a response time or times in the other display regions. The light source(s) is/are then turned OFF after a predetermined time period. The process repeats for further image data.