Double-Sided LED Display with Shared Pixel Matrices
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Solution Overview
Problem
Conventional double-faced light emitting diode displays can only display simple signs in a single color, limiting their application to large-scale full color displays.
Innovation Solution
A double-faced light emitting diode display design featuring a pair of parallel shield panels with a light emitting module between them, each equipped with pixel matrices and a shared circuit driving system, allowing for simultaneous full color image display on both sides with a simple structure and low cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional double-faced light emitting diode display uses a single light emitting module with astigmatism layers, then the structure remains simple, but the display capability is limited to single color signs only
Solution Approach 1:
The light emitting module is segmented into two separate pixel matrices (first pixel matrix and second pixel matrix) positioned at opposite sides of the light guide plate. Each pixel matrix can independently display full color images, transforming the single-function module into a dual-function display system while maintaining the overall simple structure.
Solution Approach 2:
The light guide plate serves multiple functions: it guides light from the pixel matrices, separates the light paths to opposite sides, and maintains the structural integrity of the double-faced display. This multi-functionality allows the system to achieve full color display capability without proportionally increasing complexity.
2Adaptability or versatility
If a double-faced display uses separate light emitting modules for each side, then full color display capability is achieved, but the device size and complexity increase
Solution Approach 1:
The first and second pixel matrices are nested within a single integrated light emitting module structure, with both matrices sharing common components such as the light guide plate and housing. This nesting approach allows full color display capability while minimizing the overall device volume compared to using completely separate modules.
Solution Approach 2:
The patent merges two pixel matrices into a single integrated module where both matrices share the light guide plate and are housed together. This combining approach achieves full color display capability on both faces while keeping the device compact and avoiding the volume increase that would result from completely separate modules.
3Adaptability or versatility
If conventional light emitting diode displays use only a single shield panel, then the manufacturing process remains simple, but the application scope is limited
Solution Approach 1:
The display system is segmented into two independent pixel matrices that can be manufactured separately and then integrated. This segmentation allows each matrix to be optimized for specific applications while maintaining overall manufacturing simplicity through modular assembly processes.
Solution Approach 2:
The double-faced pixel matrix structure provides universal applicability for various display needs (front and back displays) while using standardized manufacturing processes for the pixel matrices and light guide plate, thus expanding application scope without significantly complicating manufacturing.
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
Enables full color display capability with a simple structure and small size, suitable for applications like traffic signal boards and large-scale display boards, enhancing versatility and cost-effectiveness.
Implementation Method 1
Each pixel unit corresponds to one respective corresponding video contrast enhancement unit and includes three light emitting diodes having three optical primary colors (i.e., R (red), G (green) and B (blue) respectively)
Implementation Method 2
light emitting diodes emit light
Implementation Method 3
Each video contrast enhancement unit includes a white reflecting portion surrounding a through hole and a dark portion around the white reflecting portion
Implementation Method 4
white reflecting portion surrounding a through hole
Data Source
AI summary
A double-faced light emitting diode display includes a pair of parallel shield panels (20, 20′), and a light emitting module (30) located between the shield panels. Each shield panel includes a video contrast enhancement assembly. The light emitting module includes an opaque insulative substrate (31) with a pair of pixel matrixes symmetrically formed on opposite surfaces (310, 310′) thereof and a circuit driving system formed at at least one of the surfaces. Each pixel matrix includes a plurality of pixel units (320, 320′). Symmetrically opposite pairs of pixel units are electrically interconnected so that the shield panels can simultaneously display same images. The double-faced light emitting diode display has a simple structure, a small size, low cost and full color display capability, and can be advantageously applied in traffic signal boards, large-scale display boards, surround cinemas and so on.