Backlighting Devices Using Segmented Light Emission Profiles
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Solution Overview
Problem
Current backlighting and edge-lighting technologies for LCDs lack energy efficiency and effective color reproduction, with existing solid state light emitters not fully optimizing light emission for improved display performance.
Innovation Solution
The use of specific light emission profiles, such as BSY-1, BSY-2, BSR, BSG-1, BSG-2, and BSG-3 lights, defined by specific x, y color coordinates on the CIE Chromaticity Diagram, in combination with solid state light emitters and luminescent materials, to achieve high energy efficiency and improved color reproduction in backlighting and edge-lighting devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional backlighting and edge-lighting technologies are used, then display devices can provide basic illumination, but energy efficiency and color reproduction are insufficient
Solution Approach 1:
The patent segments the backlighting system into multiple independent light emitters with specific chromaticity coordinates (BsY1, BsY2, BsR, BsG1, BsG2, BsG3) that can be individually controlled. This segmentation allows each emitter to optimize its spectral output for energy efficiency while collectively providing complete color coverage through additive mixing, resolving the contradiction between energy efficiency and color reproduction quality
Solution Approach 2:
The patent changes the chromaticity parameters of the light emitters to specific coordinates on the CIE 1931 diagram (e.g., BsY1 at x=0.32, y=0.40; BsR at x=0.62, y=0.32). These parameter changes enable the system to achieve high energy efficiency by selecting emitters with optimal luminous efficacy while maintaining accurate color reproduction through the coordinated use of multiple emitters with complementary spectral characteristics
2Use of energy by moving object
If solid state light emitters are used, then energy efficiency and lifetime are improved, but color reproduction and light emission optimization are not fully achieved
Solution Approach 1:
The patent assigns different local qualities (specific chromaticity coordinates and spectral characteristics) to different solid state light emitters based on their position and function in the display system. Each emitter type (BsY1, BsY2, BsR, BsG1, BsG2, BsG3) is optimized for its specific role, with precise control over its emission profile. This local quality differentiation enables the system to achieve both high energy efficiency and precise color reproduction by matching emitter characteristics to functional requirements
3Ease of manufacture
If traditional light emitters are used, then manufacturing is simpler, but energy efficiency and durability are lower
Solution Approach 1:
The patent employs solid state light emitters that serve multiple functions simultaneously: they provide illumination, define color space, and offer long-term durability. The same emitter types (BsY1, BsY2, BsR, BsG1, BsG2, BsG3) are used across different display configurations (backlighting and edge-lighting), creating a universal solution that maintains manufacturing simplicity while dramatically improving energy efficiency and reliability compared to traditional incandescent or fluorescent sources
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
These light emission profiles enable backlighting and edge-lighting devices to operate with high energy efficiency and enhanced color reproduction, meeting the requirements for improved display performance in LCDs.
Implementation Method 1
Solid state light emitters (e.g., light emitting diodes) are receiving much attention in all fields of light emission
Implementation Method 2
The use of specific light emission profiles, such as BSY-1, BSY-2, BSR, BSG-1, BSG-2, and BSG-3 lights, defined by specific x, y color coordinates on the CIE Chromaticity Diagram, in combination with solid state light emitters and luminescent materials
Data Source
AI summary
In some embodiments, an LCD device comprising (1) liquid crystals, (2) at least one lighting device that emits BSY-1, BSY-2, BSR, BSG-1, BSG-2 and/or BSG-3 light, (3) solid state light emitters (430-480 nm) and luminescent material (555-585 nm, 595-625 nm, or 510-560 nm), and/or (4) a light guide, a reflector and/or a light polarizer. In some embodiments, a light device comprising (1) at least one lighting device that emits BSY-1, BSY-2, BSR, BSG-1, BSG-2 and/or BSG-3 light, (2) a light guide, a reflector and/or a light polarizer, and/or (3) solid state light emitters (430-480 nm) and luminescent material (555-585 nm, 595-625 nm, or 510-560 nm).