Optical Dome Bat-Wing Profile for Display Contrast
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display apparatuses face challenges in maintaining the optical profile of light sources, especially when an optical dome is included, which can alter the light distribution and constrain the enhancement of contrast ratios due to limited local dimming blocks.
Innovation Solution
The display apparatus incorporates a light source with a bat-wing shaped optical profile and an optical dome specifically designed to maintain this profile, allowing for reduced optical distance or number of light sources while ensuring consistent light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light-transmitting resin layer is used to protect the light source, then the light source is protected, but the optical profile of the light source is changed
Solution Approach 1:
The optical dome is designed with a specific curvature radius that creates a bat-wing shaped light distribution pattern, transforming the uniform light profile into a targeted local quality distribution that enhances contrast ratios while maintaining source protection
Solution Approach 2:
By optimizing the curvature radius parameter of the optical dome relative to the LED chip size, the patent achieves a specific bat-wing optical profile that maintains source protection while controlling light distribution characteristics
2Area of stationary object
If lenses are used to widen the optical diffusion area, then the light diffusion area is expanded, but the number of blocks for local dimming is limited
Solution Approach 1:
The patent divides the backlight unit into multiple independently controllable light sources arranged in a matrix pattern, enabling local dimming control of individual regions without requiring lenses, thus maintaining both wide diffusion area and high device complexity for precise local control
3Shape
If the optical dome is designed to maintain the bat-wing shaped optical profile, then the optical profile is maintained, but the design complexity increases
Solution Approach 1:
The optical dome integrates multiple functions: it protects the LED chip, shapes the light distribution into a bat-wing profile, and enables local dimming control, combining several components into one that reduces overall design complexity despite the sophisticated optical profile requirement
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 the uniformity of surface light and improves contrast ratios by maintaining the bat-wing shaped optical profile, even with the optical dome, thereby reducing the thickness and cost of the display apparatus.
Implementation Method 1
an optical film arranged between the LED chip and the liquid crystal panel, wherein the optical film comprises a quantum dot sheet formed to enhance color reproducibility by making a change in wavelength of light
Implementation Method 2
an optical dome disposed over and enclosing the LED chip
Implementation Method 3
a distributed Bragg reflector (DBR) layer arranged on an upper surface of the LED chip
Data Source
AI summary
A display apparatus is provided that includes: a printed circuit board (PCB); a light emitting diode (LED) chip mounted on the PCB and configured to emit light; an optical dome disposed over and enclosing the LED chip; a distributed Bragg reflector (DBR) layer arranged on an upper surface of the LED chip; a liquid crystal panel configured to block or pass light output from the LED chip; an optical film arranged between the LED chip and the liquid crystal panel, wherein the optical film comprises a quantum dot sheet formed to enhance color reproducibility by making a change in wavelength of light.