Slim Backlight Kit with Light Diffusion Structures
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Solution Overview
Problem
Conventional backlight kits for electronic devices are bulky due to their design, restricting miniaturization and limiting the flexibility of electronic circuits, as they require LED light sources to be positioned at specific locations for optimal luminance, compromising the slimness and usability of electronic devices.
Innovation Solution
A backlight kit featuring a slim-type light guide element with a concave structure and light diffusion regions, allowing for a luminance gradient effect without the need for LEDs to be positioned at the highest luminance region, thereby reducing the overall volume and enhancing circuit flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional light-guiding element with varying thickness is used to produce a luminance gradient effect, then the luminance gradient visual effect is achieved, but the overall volume of the electronic device increases
Solution Approach 1:
The light-guiding element is designed with localized light diffusion structure regions at specific positions rather than varying thickness throughout. These local diffusion regions selectively scatter light to create the luminance gradient effect only where needed, while the rest of the element maintains a uniform, minimal thickness to reduce overall device volume.
2Illumination intensity
If the LED light source is positioned at the highest luminance region of the luminance gradient region, then optimal luminance output is achieved, but the flexibility and freedom of electronic circuit layout is deteriorated
Solution Approach 1:
The light diffusion function is extracted from the LED light source position and relocated to separate light diffusion structure regions within the light-guiding element. This separation allows the LED to be positioned independently for optimal circuit layout while the diffusion regions are strategically placed to create the luminance gradient effect, thus decoupling optical performance from circuit layout constraints.
3Volume of moving object
If the light-guiding element is made thinner to meet slimness requirements, then the device slimness is improved, but the ability to produce a luminance gradient effect is compromised
Solution Approach 1:
Instead of changing the geometric parameter of thickness to achieve luminance gradient, the invention changes the optical parameter by introducing light diffusion structures with varying diffusion coefficients or densities at different positions. This allows a thin, uniform light-guiding element to produce luminance gradient effects through optical parameter variation rather than geometric variation.
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 enables a luminance gradient visual effect while minimizing the volume of the backlight kit, allowing electronic devices to meet slimness requirements and improving the flexibility and freedom of electronic circuits.
Implementation Method 1
After the illumination module emits a light beam, the light beam is transferred through the slim-type light guide element
Implementation Method 2
at least three light diffusion structure regions are formed on a first side and the first surface of the slim-type light guide element
Data Source
AI summary
A backlight kit includes a base member, a covering member, a slim-type light guide element and an illumination module. The covering member is combined with the base member. The slim-type light guide element and the illumination module are arranged between the base member and the covering member. After the illumination module emits a light beam to the slim-type light guide element, the light beam is transferred through the slim-type light guide element. Consequently, a luminance gradient region is formed on the surface of the covering member.