Dual Screen Display Shared Backlight Polarization Control
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Solution Overview
Problem
Current dual screen display modules are thick and heavy due to separate backlight modules for each display unit, which does not meet the requirements for slim and thin portable mobile terminals in the era of mobile internet technology.
Innovation Solution
A dual screen display apparatus with a shared backlight module unit, polarization filtering units, and light source units that allow for orthogonal polarization directions to deflect illumination light to both display units, reducing thickness and weight while enabling controlled light emission for appropriate dual screen displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate backlight modules are used for each display unit, then each display unit can be independently illuminated, but the thickness and weight of the dual screen display module becomes twice as much as the single screen display module
Solution Approach 1:
The patent merges two separate backlight modules into a single shared backlight module that illuminates both display units. The backlight module is positioned between the two display units and provides illumination to both simultaneously, reducing the overall weight and thickness while maintaining independent illumination capability through polarization control
Solution Approach 2:
The single backlight module serves multiple functions by illuminating both the first and second display units. Through the use of polarization filtering units with orthogonal polarization directions, the backlight module can selectively illuminate either display unit or both simultaneously, providing universal illumination capability
2Reliability
If separate backlight modules are used for each display unit, then each display unit can be independently illuminated, but the thickness of the dual screen display module becomes twice as much as the single screen display module
Solution Approach 1:
The patent merges two separate backlight modules into a single shared backlight module that illuminates both display units. The backlight module is positioned between the two display units and provides illumination to both simultaneously, reducing the overall weight and thickness while maintaining independent illumination capability through polarization control
Solution Approach 2:
The patent introduces polarization direction as a new dimension for controlling light transmission. By using polarization filtering units with orthogonal polarization directions, the system can selectively direct light to different display units without requiring separate physical backlight modules, thereby reducing thickness
3Weight of stationary object
If a shared backlight module is used for both display units, then the thickness and weight are reduced, but the display configuration flexibility may be limited
Solution Approach 1:
The single backlight module serves multiple functions by illuminating both the first and second display units. Through the use of polarization filtering units with orthogonal polarization directions, the backlight module can selectively illuminate either display unit or both simultaneously, providing universal illumination capability
Solution Approach 2:
The patent uses controllable polarization filtering units that can dynamically adjust their polarization states. This allows the system to flexibly configure display modes (such as independent display on each unit, simultaneous display, or selective illumination) without changing the physical structure, thereby maintaining high adaptability with reduced weight
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 achieves a slimmer and thinner dual screen display apparatus that meets user requirements for portable devices by sharing the backlight module and using polarization filtering units to efficiently illuminate both display units, allowing for flexible display configurations.
Implementation Method 1
The illumination light is deflected to the first display unit and the second display unit through the backlight module unit
Implementation Method 2
The illumination light is deflected to the first display unit and the second display unit through the backlight module unit
Implementation Method 3
a first polarization filtering unit and a second polarization filtering unit, arranged on the light receiving surface of the first display unit and the light receiving surface of the second display unit respectively. The polarization direction of the first polarization filtering unit is orthogonal to the polarization direction of the second polarization filtering unit
Data Source
AI summary
A dual screen display device, dual screen display method, and electronic equipment are described. The device includes a first display unit and a second display unit, a light receiving surface of the first display unit being arranged opposite to a light receiving surface of the second display unit; a backlight module unit, arranged between the light receiving surface of the first display unit and the light receiving surface of the second display unit; a light source unit, used for emitting illumination light to the backlight module unit; and a first polarization filtering unit and a second polarization filtering unit, arranged on the light receiving surface of the first display unit and the light receiving surface of the second display unit respectively.