Backlight Stepped Reflection Member for Uniform Luminance
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Solution Overview
Problem
Display devices with linear or point light sources face challenges in achieving uniform luminance across the display area, leading to suboptimal display quality due to non-uniform light distribution.
Innovation Solution
Incorporating a side-emitting lens and a reflection member with stepped parts in the backlight unit, which directs light emitted from the light sources in a way that prevents concentration at edges, ensuring even light distribution across the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a linear light source or point light source is used in the backlight unit, then the device complexity is reduced, but the luminance uniformity across the display area deteriorates
Solution Approach 1:
The supporting member is divided into multiple stepped parts with different heights, creating multiple reflection surfaces at different positions. This segmentation allows light to be reflected from various levels, distributing the light more uniformly across the display area and preventing concentration at edges.
Solution Approach 2:
The invention introduces a vertical dimension by creating stepped parts with different heights rather than using a flat supporting member. This multi-level structure adds depth to the light reflection path, enabling light to bounce between different elevation levels and achieve more uniform lateral distribution across the display panel.
2Productivity
If light sources are positioned close to the edges of the display panel, then the productivity and light generation efficiency are improved, but light concentration at edges occurs causing bright lines
Solution Approach 1:
By creating stepped parts with varying heights, the invention transforms the light reflection from a single-plane operation to a multi-level vertical structure. Light emitted near edges is reflected multiple times between stepped surfaces at different elevations, redistributing the light energy laterally and preventing concentration at the display panel edges.
Solution Approach 2:
The stepped parts are strategically positioned and sized to create localized reflection zones. Each stepped part provides specific reflection characteristics for light in its vicinity, with the collective arrangement ensuring that edge-emitted light is redistributed to achieve uniform overall illumination without bright lines.
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 reduces the occurrence of bright lines at the edges of the display area, enhancing overall display quality by ensuring uniform luminance and preventing light concentration issues.
Implementation Method 1
the plurality of stepped parts extended toward the light source has a light reflecting characteristic
Data Source
AI summary
A display device includes a display panel which displays an image, a backlight unit which generates light and emits the light toward the display panel, a supporting member which supports edge parts of the display panel, and an accommodation member defining an accommodation space in which the backlight unit and the supporting member are disposed. In the accommodation space, the backlight unit includes a light source which generates the light, and a side-emitting lens which covers the light source and through which the light generated by the light source is emitted. In the accommodation space, the supporting member defines a plurality of stepped parts, where the plurality of stepped parts extended toward the light source has a light reflecting characteristic.