Reflective Display Light Guide for White Fog Reduction
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Solution Overview
Problem
Existing reflective displays suffer from white fog phenomena and reduced display frame definition due to uneven light distribution, affecting display quality.
Innovation Solution
The electronic device incorporates a light guide plate with distinct brightness distributions on its surfaces, where the first surface has a higher maximum brightness than the second surface, and the brightness distribution is optimized to reduce white fog and enhance frame clarity by adjusting the density, distribution, and shape of dots on the light guide plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide plate with side light source is used in reflective display, then the display can be used in dark rooms or weak light environments, but white fog phenomenon occurs and display frame definition is reduced
Solution Approach 1:
The patent applies local quality by creating different brightness characteristics at different locations on the light guide plate. Specifically, the light guide plate is designed to emit first light from a first surface area with higher brightness and second light from a second surface area with lower brightness. This non-uniform brightness distribution allows the display to be visible in dark environments while preventing white fog phenomenon in specific regions, thereby resolving the contradiction between overall brightness and localized harmful effects.
2Illumination intensity
If a light guide plate with side light source is used in reflective display, then the display can be used in dark rooms or weak light environments, but the definition of the display frame is reduced
Solution Approach 1:
The patent improves display frame definition by applying local quality principles to the light guide plate design. Different regions of the light guide plate are engineered to provide different brightness levels - the first surface area provides higher brightness for general visibility while the second surface area provides lower brightness to maintain frame definition. This spatial differentiation of brightness characteristics allows the display to function in dark environments without sacrificing frame clarity.
3Device complexity
If uniform light distribution is provided across the light guide plate, then the display structure is simple, but white fog phenomenon occurs and frame clarity is affected
Solution Approach 1:
The patent resolves the contradiction between structural simplicity and harmful effects by implementing local quality through a differentiated light guide plate design. Rather than using a completely complex system, the patent modifies the light guide plate to have distinct first and second surface areas with different brightness characteristics. This approach maintains relative structural simplicity while effectively preventing white fog phenomenon through localized brightness control.
Solution Approach 2:
The patent applies segmentation by dividing the light guide plate into at least two distinct surface areas: a first surface area and a second surface area. Each area is designed to emit light with different characteristics - the first area provides higher brightness while the second area provides lower brightness. This segmentation allows the system to achieve uniform overall illumination while preventing white fog in specific regions, resolving the contradiction between simplicity and harmful effects.
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 optimized brightness distribution reduces white fog and improves the clarity of the display frame by concentrating light emission where it is most effective, thereby enhancing the overall display quality.
Implementation Method 1
a light guide plate arranged on the reflective panel... when light emitted from the light source passes through the light guide plate
Data Source
AI summary
An electronic device includes a reflective element, a light guide plate and a light source. The light guide plate is arranged on the reflective element, and has a first surface, a second surface and a side surface connected between the first surface and the second surface, wherein the first surface is disposed between the reflective element and the second surface. The light source is adjacent to the side surface of the light guide plate. When light emitted from the light source passes through the light guide plate, a light shape diagram is emitted from the second surface. Wherein, the light shape diagram has an inclination angle and an orientation angle ranging from 0 to 360 degrees. Wherein, in a position far away from the light source is defined as the orientation angle of 90 degrees, and a direction parallel to the normal of the first surface is defined as the inclination angle of 0 degrees, and wherein, when the orientation angle is 90 degrees and the inclination angle is smaller than 40 degrees, a corresponding brightness is greater than 50% of a maximum brightness in the brightness distribution.