LED Light Board Overlap for Uniform Wide-Angle Edge Brightness
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Solution Overview
Problem
LCD panels experience insufficient brightness at wide viewing angles, particularly at the edges of the display area when using LED backlight modules.
Innovation Solution
The LED light board, comprising a circuit substrate and resin layer, overlaps the LCD panel to reflect and refract light from the display area to the peripheral area, ensuring light is distributed evenly across the entire screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If LEDs are only placed under the display area, then the device complexity and cost are reduced, but the edge brightness at the peripheral area becomes insufficient
Solution Approach 1:
The patent introduces a light-reflecting structure (aluminum foil or reflective layer) as an intermediary element between the LEDs and the peripheral area. This mediator reflects and redirects light from the display area toward the peripheral area, enabling uniform illumination without placing LEDs directly under the peripheral area, thus resolving the contradiction between simplified LED arrangement and sufficient edge brightness.
2Illumination intensity
If additional LEDs are placed under the peripheral area, then the edge brightness is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The light-reflecting structure serves as a cost-effective intermediary that redirects existing LED light to the peripheral area, eliminating the need for additional LEDs in the peripheral region. This approach maintains edge brightness while significantly reducing manufacturing complexity and cost.
Solution Approach 2:
Instead of physically placing LEDs under the peripheral area, the patent uses a reflective copy mechanism where light from the display area LEDs is reflected toward the peripheral area, achieving the same illumination effect without the physical presence of additional LEDs.
3Device complexity
If the LED light board only covers the display area, then the structure is simplified, but the light distribution uniformity across the entire screen deteriorates
Solution Approach 1:
The light-reflecting structure acts as a mediator that redistributes light from the display area to the peripheral area, ensuring uniform light composition across the entire screen while keeping the LED light board structure simplified and covering only the display area.
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
This configuration enhances edge brightness without the need for additional LEDs under the peripheral area, reducing costs while maintaining uniform illumination.
Implementation Method 1
light emitted by the LEDs overlapping the display area is reflected and/or refracted in the LED light board to the peripheral area
Implementation Method 2
light emitted by the LEDs overlapping the display area is reflected and/or refracted in the LED light board to the peripheral area
Data Source
AI summary
Disclosed is a liquid crystal display (LCD) device, including an LCD panel and a light-emitting diode (LED) light board. The LCD panel has a display area and a peripheral area located on at least one side of the display area. The LED light board overlaps the LCD panel in a normal direction of a light-emitting surface of the LCD panel. The LED light board includes a circuit substrate, multiple LEDs, and a resin layer. The circuit substrate overlaps the display area and the peripheral area in the normal direction of the light-emitting surface. The LEDs are arrayed on the circuit substrate. The LEDs overlap the display area in the normal direction of the light-emitting surface. The resin layer covers the circuit substrate and overlaps the display area and the peripheral area in the normal direction of the light-emitting surface.