Peep-Proof Display Using Dual Backlight Modules
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional peep-proof display apparatuses rely on optical films that limit light distribution, leading to decreased display quality and brightness, and are costly due to expensive materials and increased module thickness.
Innovation Solution
A peep-proof display method utilizing two backlight modules with distinct light intensity distribution curves, one for narrow and one for wide viewing angles, alternately enabled during sub-frame periods to maintain privacy without optical films, ensuring consistent brightness and display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If optical films (peep-proof layer) are disposed between backlight module and display panel to achieve peep-proof effect, then privacy protection is improved, but display quality and brightness decrease
Solution Approach 1:
The patent replaces the optical film-based peep-proof mechanism with a backlight control mechanism. Instead of using physical optical films to restrict light distribution, the invention uses independent control of first and second backlight modules with different light distribution characteristics to achieve peep-proof effect while maintaining display quality and brightness.
Solution Approach 2:
The patent changes the light distribution parameters of backlight modules based on viewing angle. The first backlight module has a first light distribution parameter optimized for narrow viewing angles, while the second backlight module has a second light distribution parameter optimized for wide viewing angles. The controller dynamically adjusts which backlight module operates based on the detected viewing angle, thereby achieving peep-proof effect without degrading display brightness or quality.
2Object-affected harmful factors
If peep-proof film is attached on display panel to change light distribution at larger viewing angle, then peep-proof effect is improved, but display quality and brightness decrease
Solution Approach 1:
The patent replaces the peep-proof film's optical structure that limits light distribution with a dynamic backlight control system. By using controllers to independently manage first and second backlight modules with different light distribution characteristics, the system achieves peep-proof effect without the light distribution limitations imposed by optical films, thereby maintaining display quality.
3Object-affected harmful factors
If optical films are used to achieve peep-proof effect, then privacy protection is improved, but manufacturing cost increases due to expensive materials
Solution Approach 1:
The patent replaces expensive optical films with a backlight control system that uses independent control of first and second backlight modules. This substitution eliminates the need for costly peep-proof films while achieving the same privacy protection effect through dynamic adjustment of light distribution based on viewing angle.
Solution Approach 2:
The patent achieves peep-proof effect by changing the operational parameters of existing backlight modules rather than adding expensive optical films. The controller adjusts which backlight module operates based on viewing angle detection, utilizing the inherent light distribution characteristics of each module to provide privacy protection without additional material costs.
4Object-affected harmful factors
If optical films are used to achieve peep-proof effect, then privacy protection is improved, but module thickness increases
Solution Approach 1:
The patent replaces physical optical films with a control system that manages first and second backlight modules. This substitution eliminates the additional thickness that would be required for peep-proof films while achieving privacy protection through dynamic control of light distribution based on viewing angle.
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 achieves a good peep-proof effect while maintaining display quality and brightness, reducing material costs and module thickness by eliminating the need for optical films.
Implementation Method 1
The first backlight module has a first light intensity distribution curve having a peak in a narrow viewing angle range
Implementation Method 2
The second backlight module has a second light intensity distribution curve having peaks in a wide viewing angle range
Implementation Method 3
Output a first data signal and output a second data signal according to the first data signal... so as to display the first data signal on the display panel
Data Source
AI summary
A peep proof display method adapted to a display apparatus including a first backlight module and a second backlight module. At a narrow view angle display mode, output a first data signal and a second data signal according to the first data signal. During a first sub-frame period, enable the first backlight module and disable the second backlight module so as to display the first data signal on the display apparatus. During a second sub-frame, enable the second backlight module and disable the first backlight module so as to display the second data signal on the display apparatus. A peak of a first light intensity distribution curve of the first backlight module is in a narrow viewing angle range. Peaks of a second light intensity distribution curve of the second backlight module are in a wide viewing angle range individual to the narrow viewing angle range.