Display Backlight Wide-Angle LEDs for Uniform Thin Profiles
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Solution Overview
Problem
Existing display devices face issues with non-uniform light distribution due to insufficient spacing between light emitting units in the backlight module, leading to degraded performance as the thickness of the display device reduces.
Innovation Solution
A display device design featuring a backlight module with light emitting units having a spray angle greater than or equal to 135 degrees and less than 180 degrees, including a base plate, controllers, a covering layer, optical films, and pins to ensure uniform light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the thickness of the display device is reduced, then the display device achieves thinner profile and lower weight, but the spacing between light emitting units in the backlight module becomes insufficient leading to non-uniform light distribution
Solution Approach 1:
The patent changes the key parameter of light emitting units by adopting wide spray angle LEDs with spray angles of 140 degrees or more. This parameter change allows the light to spread more uniformly across the display panel, compensating for the reduced spacing caused by thinner device profile. The wide spray angle ensures adequate light distribution even when the distance between adjacent light emitting units is small.
2Volume of moving object
If the spacing between light emitting units is reduced, then the backlight module achieves more compact structure and thinner profile, but the light mixing becomes insufficient resulting in degraded display performance
Solution Approach 1:
The patent modifies the light emission characteristics by selecting LEDs with spray angles of 140 degrees or more. This parameter change enables the light to cover larger areas with sufficient intensity, maintaining reliable display performance even when the physical spacing between light emitting units is reduced for a more compact backlight module structure.
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 design achieves improved light uniformity and efficiency, enhancing the display quality by optimizing the spacing and arrangement of light emitting units and optical components.
Implementation Method 1
a plurality of light emitting units having a wide spray angle, wherein a spray angle of one of the light emitting units is greater than or equal to 135 degrees and less than 180 degrees
Data Source
AI summary
A display device includes a backlight module and a display module. The backlight module includes a plurality of light emitting units, a base plate and at least one controller. The light emitting units are disposed on a first surface of the base plate, the controller is disposed on a second surface of the base plate, the second surface is opposite to the first surface, and at least one of the light emitting units is electrically connected to the controller. The display module is disposed on the first surface, and the light emitting units are disposed between the display module and the base plate. The backlight module includes a covering layer, an optical film, and a plurality of pins, the covering layer is disposed on the first surface of the base plate, and the pins are disposed between the covering layer and the optical film.