Curved Display Backlight Uniformity via Mixed LED Orientation
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Solution Overview
Problem
Curved display devices face challenges in providing uniform light distribution without causing bright spots or optical stains, which affect the display quality and user experience.
Innovation Solution
The design includes a backlight unit with a first light source, second and third light sources, and an optical member, where the optical distance between the top emitting diode package and the optical member is greater than between the side emitting diode packages and the optical member, and the light emitting diode packages have different densities in regions to prevent bright spots, ensuring uniform light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a curved display device uses a backlight unit with uniform light source arrangement, then the device structure is simple, but bright spots and optical stains occur affecting display quality
Solution Approach 1:
The patent applies local quality by arranging different types of light emitting diode packages (top-emitting and side-emitting) at different locations within the backlight unit. Specifically, top-emitting LED packages are positioned at the center region while side-emitting LED packages are positioned at the peripheral regions of the curved display panel. This localized differentiation in light source configuration optimizes light distribution to prevent bright spots and optical stains, thereby improving display quality without significantly complicating the overall manufacturing process.
2Manufacturing precision
If light emitting diode packages are arranged with different densities to prevent bright spots, then display quality improves, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the backlight unit into distinct regions (center and peripheral areas) and assigning different types of light emitting diode packages to each region. The light source arrangement is segmented into top-emitting LED packages for the center region and side-emitting LED packages for the peripheral regions. This segmented approach enables optimized light distribution across different areas of the curved display panel, preventing bright spots while maintaining a manageable level of device complexity through systematic regional differentiation.
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 display quality by preventing bright spots and optical stains, providing a uniform light distribution that maintains image brightness across the display surface, while reducing manufacturing costs through varying light emitting diode package densities.
Implementation Method 1
a first light source including a top emitting diode package, second and third light sources arranged in the first direction to allow the first light source to be disposed between the second and third light sources
Data Source
AI summary
A display device includes a display panel and a backlight unit providing the display panel with light. The backlight unit includes a first light source including a top emitting diode package and second and third light sources arranged in a first direction to allow the first light source to be disposed between the second and third light sources. Each of the second and third light sources includes a side emitting diode package. An optical distance between the top emitting diode package of the first light source and the optical member is greater than optical distances between the optical member and the side emitting diode packages of the second and third light sources.