Optical Chamber Light Path Adjusting Element Uniformity
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Solution Overview
Problem
Display devices face issues with non-uniform brightness due to limited light emission angles, leading to hotspots on light-guiding plates.
Innovation Solution
An optical chamber with a light path adjusting element and sidewalls that reflect light uniformly, utilizing a compound lens with a refractive index between 1.41 and 1.8, and a diffuse reflection structure to ensure even light distribution, connected with a display module to irradiate light onto a light incidence surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional light source is used in display devices, then the light emission angle is limited, but non-uniform brightness and hotspots occur on the light-guiding plate
Solution Approach 1:
The patent introduces an optical chamber as an intermediary component between the light source and the light-guiding plate. This optical chamber contains a light path adjusting element that mediates the light transmission process, transforming the limited-angle light from the conventional light source into uniformly distributed light, thereby eliminating hotspots while maintaining the benefits of conventional light sources
Solution Approach 2:
The patent changes the light emission parameters by using a light path adjusting element with specific optical properties (refractive index between 1.41 and 1.8). This element modifies the light emission angle and distribution characteristics, transforming concentrated light into uniformly distributed light across the light-guiding plate surface
2Illumination intensity
If a light path adjusting element with compound lens is used to uniformize light emission, then brightness uniformity is improved, but the device complexity increases
Solution Approach 1:
The optical chamber is designed to perform multiple functions simultaneously: it houses the light path adjusting element, provides structural support, defines the light emission geometry through its sidewalls, and works with the bent section to control light direction. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity
Solution Approach 2:
The patent applies local quality by using a diffuse reflection structure specifically on the inner surfaces of the sidewalls and bent section, while other parts of the optical chamber may use different materials or surface treatments. This localized approach optimizes light distribution where needed without unnecessarily complicating the entire device structure
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 solution effectively eliminates hotspots on light-guiding plates by uniformly emitting light, enhancing brightness uniformity and improving display performance.
Implementation Method 1
a plurality of sidewalls, including a first sidewall having at least one opening, the plurality of sidewalls being configured to reflect light in the optical chamber
Implementation Method 2
the light path adjusting element includes a compound lens with a refractive index ranging from 1.41 to 1.8
Implementation Method 3
a diffuse reflection structure is on inner surfaces of the plurality of sidewalls and the bent section
Data Source
AI summary
An optical chamber, an optical system, and a display device are provided. The optical chamber includes: a plurality of sidewalls, including a first sidewall having at least one opening, configured to reflect light in the optical chamber; and a light path adjusting element connected with the first sidewall, wherein the orthographic projection of the light path adjusting element onto the plane where the first sidewall lies at least partially lies in the area where the opening is located, and the light path adjusting element is configured to uniformly emit the light reflected by the plurality of sidewalls to the outside.