Dual-Sided Backlight Assembly for Thin LCD Luminance Control
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Solution Overview
Problem
The thickness of liquid crystal displays (LCDs) is increased by light-emitting blocks, which affects display quality, necessitating an improved backlight assembly that controls luminance while minimizing thickness.
Innovation Solution
A backlight assembly featuring a waveguide plate with first and second light-emitting modules on opposite sides, connected by optical drivers to control luminance levels, reducing the overall thickness and improving light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light-emitting blocks are used to improve display quality and control luminance, then the luminance control is improved, but the thickness of the LCD increases
Solution Approach 1:
The light-emitting blocks are divided into multiple segments arranged on opposite sides of the waveguide plate. Each segment can be independently controlled by optical drivers, allowing precise luminance control while distributing the light sources across different locations rather than requiring a single thick block structure.
Solution Approach 2:
The patent transitions from a traditional single-sided light-emitting block structure to a dual-sided arrangement where light-emitting blocks are positioned on both sides of the waveguide plate. This dimensional change allows light to be introduced from multiple directions, improving luminance control and uniformity while reducing the required thickness of individual light-emitting components.
2Illumination intensity
If multiple light-emitting blocks are used to improve light distribution, then the light distribution is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple light-emitting blocks on opposite sides of the waveguide plate into a unified backlight system. The optical drivers integrate the control of all light-emitting blocks, and the waveguide plate serves as a common light distribution medium, merging multiple components into a coordinated system that improves light distribution without proportionally increasing complexity.
Solution Approach 2:
The waveguide plate serves multiple functions: it guides light from the light-emitting blocks, distributes light uniformly across the display area, and provides structural support for mounting the light-emitting blocks on both sides. This multi-functionality reduces the need for additional separate components, thereby controlling overall device complexity.
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 enhances display quality by uniformly distributing light across the LCD, reducing thickness and improving luminance control, thus addressing the thickness and display quality issues caused by light-emitting blocks.
Implementation Method 1
a waveguide plate guiding light
Data Source
AI summary
A backlight assembly includes a waveguide plate guiding light, a first light-emitting module disposed on a first side of the waveguide plate, the first light-emitting module including a plurality of first light-emitting blocks, a second light-emitting module disposed on a second side of the waveguide plate, the second light-emitting module including a plurality of second light-emitting blocks, and a plurality of optical drivers controlling luminance levels of the first light-emitting blocks and the second light-emitting blocks, wherein at least one of the first light-emitting blocks, at least one of the second light-emitting blocks, and at least one of the optical drivers are connected to each other.