Backlight Reflective Component for Edge Color and Brightness Uniformity
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Solution Overview
Problem
Existing backlight modules using mini LEDs as light sources suffer from chromatic aberration and darkening issues in the edge area due to incomplete light conversion and uneven light reflections, which are not effectively addressed by prior solutions suitable for narrow bezel designs or cost-effective production.
Innovation Solution
A backlight module design incorporating a reflective component with specific brightness and chromaticity parameters between the side wall and light emitting units, which reflects light to reduce chromatic aberration and improve edge brightness without additional coatings, enhancing optical quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If yellow ink is arranged inside the backlight module to reduce bluishness, then chromatic aberration is mitigated, but the edge area becomes dark or yellowish at specific viewing angles
Solution Approach 1:
A reflective component with specific optical parameters (brightness 70-100, chromaticity between -10 and 10) is introduced as an intermediary element between the light emitting units and the display panel. This reflective component mediates the light reflection process, correcting chromatic aberration while maintaining proper brightness and color rendering in the edge area, avoiding the darkening and yellowing issues caused by yellow ink.
2Object-affected harmful factors
If film spacing or back frame color is adjusted to mitigate edge darkening, then optical quality improves, but the design is not suitable for narrow bezels
Solution Approach 1:
The reflective component is positioned specifically in the edge area of the backlight module, with its first surface facing the light emitting units and second surface facing the display panel. This localized placement allows optical parameter correction specifically where needed (edge area) without affecting the overall module design, making it compatible with narrow bezel configurations.
3Object-affected harmful factors
If lamp board design is adjusted to solve edge darkening, then optical quality improves, but production cost increases significantly
Solution Approach 1:
The reflective component is designed as a cost-effective solution that can be easily manufactured and integrated into the backlight module. Rather than requiring complex lamp board redesigns, this component provides the necessary optical correction at a lower production cost, making it economically viable for mass production.
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 reflective component effectively mitigates chromatic aberration and darkening in the edge area, improving optical quality and maintaining brightness across viewing angles, suitable for narrow bezel designs without increasing production costs.
Implementation Method 1
a reflective component arranged between the side wall and the at least one optical film, and surrounding the wavelength conversion film and the at least one optical film
Implementation Method 2
a wavelength conversion film arranged on the light emitting units
Data Source
AI summary
An electronic device includes a back board, plurality of light emitting units arranged on the base, an optical film arranged on the plurality of light emitting units, and a reflective component arranged on the base and including a first surface. The back board includes a base, a side portion, and a top portion, wherein in a cross section view, an extension direction of the side portion is different from an extension direction of the base and an extension direction of the top portion; wherein an end of the side portion is connected to the base and another end of the side portion is connected to the top portion. Wherein in a normal direction of the electronic device, a distance between a top surface of the top portion to a top surface of the base is greater than a distance between a top surface of the optical film to the top surface of the base, and a thickness of the reflective component is less than or equal to a thickness of the side portion; wherein a color measurement according to the CIE, the first surface of the reflective component has a brightness ranging from 70 to 100, a first chromaticity ranging from −10 to 10, and a second chromaticity ranging from −10 to 10.