Double-sided LCD with Shared Middle Frame Backlight
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Solution Overview
Problem
Conventional double-sided liquid crystal display (LCD) devices integrate two single-sided displays mechanically, which does not reduce overall cost, power consumption, or occupied space effectively, as they only utilize a single backlight module for both sides.
Innovation Solution
A double-sided LCD design featuring a middle frame with a light emitting assembly that includes two lamp boards and middle plates, where fixing bars pass through gaps and holes or protrusions in the frame to securely fix the light emitting assembly within the frame, allowing for precise placement without a back plate, thereby reducing thickness and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two single-sided display devices are integrated mechanically to form a double-sided display, then double-sided display capability is achieved, but overall cost is not reduced
Solution Approach 1:
The patent merges two single-sided display devices into a single integrated double-sided display device that shares common components including the backlight module, middle frame, and control circuits. This consolidation eliminates the need for separate backlight modules and structural components for each display, thereby achieving cost reduction while maintaining double-sided display functionality.
Solution Approach 2:
The middle frame structure serves multiple functions simultaneously: it provides mechanical support for both liquid crystal panels, houses the shared backlight module, and enables precise positioning of optical components. This multi-functionality reduces the total component count and overall device complexity.
2Adaptability or versatility
If conventional mechanical integration of two single-sided displays is used, then double-sided display is enabled, but power consumption is not reduced effectively
Solution Approach 1:
The patent combines a single backlight module to serve both display panels, eliminating the need for two separate backlight systems. This sharing of the light emitting assembly significantly reduces power consumption while enabling dual-sided display operation.
3Adaptability or versatility
If conventional mechanical integration of two single-sided displays is used, then double-sided display is achieved, but occupied space is not reduced
Solution Approach 1:
The patent integrates two display panels and their associated components into a single compact unit with shared backlight module and control circuits. This merging approach reduces the overall volume and occupied space compared to using two separate single-sided display devices.
4Manufacturing precision
If fixing bars pass through gaps and holes in the middle frame, then light emitting assembly is precisely fixed, but manufacturing complexity increases
Solution Approach 1:
The middle frame is pre-designed with precisely positioned through holes and protrusions that guide the fixing bars into correct positions. This preliminary preparation of mounting features simplifies the assembly process while ensuring high precision in light source placement, as the fixing bars naturally align with the pre-positioned features.
Data Source
AI summary
A double-sided LCD includes a first liquid crystal panel, a second liquid crystal panel arranged opposite to the first liquid crystal panel, and a backlight module arranged therebetween. The backlight module includes: a middle frame being arranged and assembled between the first liquid crystal panel and the second liquid crystal panel; and a light emitting assembly comprises a first lamp board facing toward the first liquid crystal panel, a second lamp board facing toward the second liquid crystal panel, and at least two middle plate being arranged between the first lamp board1 and the second lamp board, a gap is formed between two adjacent middle plates, and the first lamp board and the second lamp board respectively comprises a plurality of light sources. In addition, a backlight module for double-sided LCDs is also disclosed.