OLED QLED Luminous Module Edge Appearance Homogeneity
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Solution Overview
Problem
Existing lighting modules with plate-shaped active elements and protruding carrier elements have an impaired appearance due to visible edge regions, which can detract from the uniformity of the active and passive areas, especially when not in use.
Innovation Solution
A screen covers the edge area, and a light decoupling element with a microstructure is used to blend the passive area with the active area, along with a transparent spacer and circularly polarizing film to achieve a uniform appearance, ensuring the module looks homogeneous both in the switched-off and switched-on states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protruding edge region is provided on the carrier element, then the active element can be properly mounted and electrically connected, but the appearance of the lighting module is impaired due to visible passive area components
Solution Approach 1:
The patent extracts the problematic passive area components (adhesive seams, electrical connections, passivation layers) from view by using a screen that covers the edge region of the carrier element. This allows the functional edge region to remain for mounting and connection while hiding its visually disturbing components, thus resolving the contradiction between mounting reliability and appearance uniformity.
Solution Approach 2:
The patent introduces a screen as an intermediary element between the viewer and the passive area components. This screen serves as a visual barrier that mediates the appearance by blocking the view of adhesive seams, electrical connections, and passivation layers, while allowing the active element to function normally through the screen's opening.
2Ease of manufacture
If the edge area is made visible, then manufacturing and assembly are simplified, but the passive area appears non-homogeneous and detracts from the overall appearance
Solution Approach 1:
The patent extracts the visually disturbing passive area components from the viewer's perspective by covering the edge region with a screen. This allows the manufacturing and assembly to remain simple with visible edge structures, while the screen hides the adhesive seams, electrical connections, and passivation layers that would otherwise appear non-homogeneous.
3Shape
If a screen covers the edge area, then appearance uniformity is improved, but light output may be reduced
Solution Approach 1:
The patent applies local quality by making the screen partially transparent or by providing openings in the screen at positions corresponding to the active element's light emission areas. This allows the screen to cover and hide the passive area components for improved appearance uniformity, while simultaneously allowing light to pass through from the active element, thus maintaining light output efficiency.
Solution Approach 2:
The patent applies partial action by covering only the edge region with the screen while leaving the central active area exposed or partially exposed. This partial coverage is sufficient to hide the disturbing passive area components and improve appearance uniformity, while not excessively blocking the light output from the active element.
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 results in a significantly improved appearance by making the passive area appear homogeneous with the active area, allowing approximately 50% of generated light to exit while maintaining efficiency and uniformity.
Implementation Method 1
a circularly polarizing film arranged above or after the diaphragm, with a quarter-wave retardation layer arranged on the side facing the diaphragm. As a result, light incident from outside, ie 'ambient light' can be circularly polarized before it strikes the reflective surface of the cathode or the active element or the diaphragm. The phase jump during reflection rotates or changes the direction of rotation of the circular polarization and the light reflected in this way is no longer let through to the outside by the polarizing film.
Implementation Method 2
light incident from outside, ie 'ambient light' can be circularly polarized before it strikes the reflective surface of the cathode or the active element or the diaphragm. The phase jump during reflection rotates or changes the direction of rotation of the circular polarization
Implementation Method 3
a light decoupling element with a microstructure in the form of a microprism or microlens structure
Data Source
Figure 1a~1b
Figure 2a~3
Figure 4~5
AI summary
The invention relates to a luminous module comprising a plate-shaped active element (12), and a plate-shaped carrier element (22) having a surface (221) on which the active element (12) is arranged. In this case the carrier element (22) has an edge region (222) projecting with respect to the active element (12). Furthermore, the luminous module comprises a screen (21) covering the edge region (222). Said screen can have the effect that, in a plan view of the luminous module, the projecting edge region (22) is discernable less clearly. In particular, it is possible to bring about the effect that components of the luminous module are apparent or discernable to a lesser extent, or not at all. Moreover, it is also possible to achieve the effect that the appearance of the edge region (222) can be adapted particularly well to that of the active element (12). A particularly homogeneous and thus improved appearance of the luminous module can be achieved as a result.