PCB Backlight Module Layout for Uniform Display Luminance
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Solution Overview
Problem
Existing display devices face challenges in achieving uniform luminance across different regions, leading to non-uniform image quality and inefficient energy consumption.
Innovation Solution
A light emitting apparatus with a frame and a light emitting module comprising a printed circuit board, light sources, lenses, and a reflective sheet with holes, designed to emit light with varying luminance levels across different regions to maintain uniformity and improve energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light sources are uniformly distributed across the display region, then the structure is simple and easy to manufacture, but the luminance uniformity across different regions deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the arrangement and luminance characteristics of light sources in different regions of the display panel. Specifically, the light sources in the vertex region are configured with different spacing or luminance characteristics compared to those in the central region, allowing each region to have optimized luminance properties tailored to its specific requirements rather than applying a uniform configuration across the entire display area.
2Illumination intensity
If higher luminance is emitted across the entire display region, then the image quality improves, but the energy consumption increases
Solution Approach 1:
The patent implements local quality by adjusting luminance levels according to regional requirements. The vertex region, which typically requires lower luminance due to viewing angle characteristics, is configured with different luminance output compared to the central region. This regional differentiation ensures that each area receives appropriate luminance for optimal image quality while avoiding excessive energy consumption that would result from uniformly high luminance across the entire display.
3Illumination intensity
If more light sources are added to improve luminance uniformity, then the luminance distribution improves, but the device complexity and heat dissipation burden increase
Solution Approach 1:
The patent applies local quality by optimizing the number and arrangement of light sources in different regions rather than uniformly increasing the total number of light sources. The vertex region is configured with a specific number of light sources optimized for that area's luminance requirements, while the central region has a different configuration suited to its needs. This regional optimization achieves improved luminance uniformity without the excessive device complexity and heat dissipation burden that would result from simply adding more light sources uniformly across the entire display.
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 apparatus achieves uniform luminance and high image quality while reducing energy consumption by optimizing luminance levels in each region, enhancing heat dissipation and light extraction efficiency.
Implementation Method 1
a reflective sheet disposed on the PCB and including a plurality of holes configured to expose the light sources
Implementation Method 2
a plurality of lenses disposed on the light sources
Implementation Method 3
A light emitting diode is an inorganic semiconductor device that emits light generated through recombination of electrons and holes
Data Source
AI summary
A light emitting apparatus is provided to include a frame and a light emitting module disposed on the frame. The light emitting module includes a printed circuit board (PCB), light sources disposed on the PCB, a plurality of lenses disposed on the light sources, and a reflective sheet disposed on the PCB and including a plurality of holes configured to expose the light sources. A light is emitted from the light emitting module to a display region including a central region, a vertex region, a first intermediate region between the central region and the vertex region, and the first intermediate region has a first luminance lower than a second luminance in the central region of the display region.