Surface-Emitting Unit Dimming Surface for Luminance Uniformity
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Solution Overview
Problem
Surface-emitting units with multiple panels experience non-uniform luminance due to gaps between panels, leading to dark portions and variations in brightness, which are not effectively addressed by existing technologies.
Innovation Solution
A surface-emitting unit design featuring two-dimensionally aligned panels with a transmissive member and a scattering member, where the transmissive member has a dimming surface with varying light transmittance to address the non-light-emitting regions, and a scattering member is used to diffuse light, ensuring more even luminance across the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If surface-emitting panels are arranged without contact to achieve large light source area, then the light source area is increased, but gaps are produced between panels causing luminance non-uniformity and dark portions
Solution Approach 1:
The patent applies local quality by providing a light-emitting film specifically in the gap regions between panels. This film has different properties (light-emitting capability) compared to the panel regions, creating a localized solution that addresses the luminance non-uniformity in specific areas (gaps) without affecting the overall panel structure. The light-emitting film is positioned only where needed to compensate for the dark portions.
Solution Approach 2:
The patent merges the function of multiple components: the light-emitting films on adjacent panels and the light-emitting film in the gap work together as an integrated light source system. By combining these light-emitting elements, the patent achieves continuous light emission across the entire surface including gaps, thereby improving luminance uniformity while maintaining the large area light source configuration.
2Reliability
If non-light-emitting regions are provided around panel edges for sealing and connection, then panel functionality is ensured, but luminance variation and dark portions appear in front direction
Solution Approach 1:
The patent applies local quality by placing light-emitting films specifically in the non-light-emitting regions (sealing and connection areas) between panels. These localized light-emitting films compensate for the darkness caused by sealing structures, maintaining both the reliability of panel sealing and the uniformity of overall luminance. The light-emitting property is applied only where needed to offset the functional non-light-emitting areas.
Solution Approach 2:
The patent converts the harmful effect of non-light-emitting sealing regions into a beneficial outcome by placing light-emitting films in these same regions. The sealing structures that originally caused dark portions and luminance variation are now accompanied by light-emitting films that illuminate these areas, transforming the disadvantage into an advantage where the sealing regions no longer appear as dark portions.
3Area of stationary object
If multiple surface-emitting panels are arranged to form large area light source, then light source area is increased, but gaps between panels produce non-uniform luminance distribution
Solution Approach 1:
The patent applies local quality by providing light-emitting films specifically in the gap regions between adjacent panels. This localized light emission compensates for the luminance deficiency in gap areas, ensuring uniform luminance distribution across the entire large-area light source. The light-emitting property is selectively applied only in the gap regions where it is needed to maintain compositional stability of luminance distribution.
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 significantly reduces luminance non-uniformity and makes non-light-emitting portions less noticeable, achieving a more uniform and consistent light distribution by guiding light from the transmissive member and scattering it to improve front-direction luminance.
Implementation Method 1
a transmissive member which is arranged to face the light-emitting surfaces of adjacent surface-emitting panels, propagates light emitted from the surface-emitting panels as being reflected in the transmissive member
Implementation Method 2
a scattering member which is provided to face the light exit surface of the transmissive member and scatters the light emitted from the plurality of surface-emitting panels
Data Source
AI summary
A surface-emitting unit includes a surface-emitting panel which emits light, a transmissive member which is arranged to face a light-emitting surface, propagates light emitted from the surface-emitting panel as being reflected therein, and allows light to exit from a light exit surface, and a scattering sheet which is provided to face a light exit surface of the transmissive member and scatters light. The transmissive member has a dimming surface provided between a light incident surface on which light emitted from the surface-emitting panel is incident and the light exit surface. The light-emitting surface has a light-emitting region which emits light and a non-light-emitting region which does not emit light. The dimming surface is configured such that a region facing the non-light-emitting region is different in transmittance of light from a region facing the light-emitting region, in accordance with a distribution of light emitted from each of the surface-emitting panels.