Display Device Attenuation Layer for Brightness and Perceivability
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Solution Overview
Problem
Existing display devices struggle to render the presence of a light-transmitting portion hard to perceive for a viewer when not emitting light, especially under intense extraneous light conditions, without decreasing light transmittance, which affects the visibility of unilluminated displays and requires adjustments in transmittance that complicate brightness enhancement.
Innovation Solution
A display device comprising an outer surface panel with an attenuation portion, a display element, and a display forming member with a light-blocking layer and an attenuation layer that attenuates light from a light source, ensuring the light-transmitting portion is not perceivable even under intense extraneous light without lowering the transmittance of the attenuation portion, maintaining high brightness and simplicity in configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If transmittance of the attenuation portion is decreased to make the light-transmitting portion hard to perceive under intense extraneous light, then the light-transmitting portion becomes less perceivable, but brightness of light exiting from the display must be enhanced further which complicates the system
Solution Approach 1:
The patent divides the attenuation function into two separate components: the attenuation portion in the outer surface panel and the attenuation layer in the display forming member. This segmentation allows each component to contribute partially to the overall light attenuation, enabling the system to maintain low perceivability of the light-transmitting portion under extraneous light while avoiding the need to excessively enhance display brightness, thus reducing system complexity
Solution Approach 2:
The patent employs a composite structure combining the attenuation portion (made of light-transmitting resin with attenuating properties) and the attenuation layer (made of resin with light-transmitting or light-blocking properties). This composite material approach enables effective light attenuation without requiring extreme adjustments to single-component transmittance, thereby maintaining brightness requirements while solving the perceivability issue
2Illumination intensity
If transmittance of the attenuation portion is maintained high to ensure bright display, then the light-transmitting portion becomes more perceivable under intense extraneous light, but the display brightness is maintained
Solution Approach 1:
By segmenting the attenuation function between the attenuation portion and the attenuation layer, the patent allows the attenuation portion to maintain high transmittance for bright display while the attenuation layer provides additional attenuation to reduce the perceivability of the light-transmitting portion under extraneous light, thus resolving the contradiction between brightness and perceivability
Solution Approach 2:
The patent applies different optical properties to different regions: the attenuation portion maintains high transmittance for bright display areas, while the attenuation layer provides localized attenuation specifically for the light-transmitting portion shapes. This local quality differentiation allows simultaneous achievement of high display brightness and reduced perceivability of inactive elements
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 maintains high light transmittance in the attenuation portion, allowing for high-brightness indication of display objects without increasing the number of light sources or adding cooling structures, while preventing the perception of the light-transmitting portion when not emitting light, thus enhancing the device's sophistication and reducing costs.
Implementation Method 1
an attenuation layer, which covers the light-blocking layer from a side where the display region is present to attenuate light irradiated from the light source and passing through the light-transmitting portion
Implementation Method 2
an outer surface panel including an attenuation portion, which is to illuminate and indicate the display objects while attenuating light
Data Source
AI summary
An attenuation portion is to illuminate first and second display objects while attenuating light. A display element causes light to enter the attenuation portion to illuminate the first display object in a display region. A light source irradiates light to illuminate the second display object in the display region. A display forming member has a light-blocking layer and an attenuation layer. The light-blocking layer has a light-transmitting portion defining a shape of the second display object. The attenuation layer covers the light-blocking layer from a display region side to attenuate light, which is from the light source and passes through the light-transmitting portion. The display forming member indicates the second display object in the display region with emission of light which is attenuated through the attenuation layer and enters the attenuation portion.