Optoelectronic Lighting Pixel Layout to Prevent Adhesive Creeping
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Solution Overview
Problem
Optoelectronic lighting devices integrated into motor vehicle interior elements face challenges in achieving a compact design while maintaining close spacing of lighting elements without adhesive material creeping and requiring complex grooves for excess adhesive.
Innovation Solution
The optoelectronic lighting device arranges LEDs on a carrier in a circular pattern around a central point, with each LED's center on an imaginary circular path, allowing for close proximity without adhesive creeping, using a flowable adhesive and defining the radius based on the diagonal length and safety distance to prevent collision, and optionally includes an optical fiber for efficient light coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If lighting elements are arranged closely together to achieve compact design, then device compactness is improved, but adhesive material creeps onto lighting elements causing manufacturing defects
Solution Approach 1:
The patent transitions from a conventional linear or grid arrangement to a circular arrangement of lighting elements around a central point. This dimensional reconfiguration allows elements to be positioned at equal radial distances from the center, creating uniform spacing that prevents adhesive creep while maintaining compactness. The circular geometry optimizes the use of available space compared to traditional rectangular layouts.
Solution Approach 2:
The patent specifies precise parameter relationships: the radius of the circular path is defined as at least half the diagonal length of the lighting element base surface, and a safety distance of 0-60 μm is maintained between adjacent elements. These parameter changes ensure that elements are closely spaced yet sufficiently separated to prevent adhesive interference, resolving the contradiction between compactness and manufacturing precision.
2Volume of moving object
If lighting elements are arranged in a circular pattern with specific radius, then compact arrangement is achieved, but manufacturing complexity increases due to precise positioning requirements
Solution Approach 1:
The patent defines specific parameter relationships that simplify manufacturing: the radius is set to at least half the diagonal length of the base surface, and a safety distance of 0-60 μm is specified. These standardized parameters provide clear manufacturing guidelines, reducing the complexity of precise positioning while ensuring the compact circular arrangement is achieved.
3Manufacturing precision
If safety distance is increased to prevent adhesive creeping, then manufacturing precision is improved, but device compactness deteriorates
Solution Approach 1:
The patent optimizes the safety distance parameter to a minimal effective range of 0-60 μm. This precise parameter setting provides just enough clearance to prevent adhesive creep between closely spaced elements while minimizing the space consumed, thereby maintaining device compactness. The parameter is tuned to the exact threshold needed to resolve the contradiction.
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
This configuration enables a compact, closely spaced arrangement of LEDs with reduced adhesive creeping and efficient light coupling into an optical fiber, enhancing the device's compactness and manufacturing precision.
Implementation Method 1
Each lighting element can be fixed to the upper surface of the carrier with an adhesive material that is initially flowable and then cures.
Data Source
AI summary
In an embodiment an optoelectronic lighting device includes a support and at least one pixel having three illuminating elements, wherein the illuminating elements of the pixel are arranged on an upper side of the support, each illuminating element having a center point, wherein the illuminating elements are arranged around a central point lying on the upper side of the support such that the center points of the illuminating elements lie on a circular path with a defined radius revolving around the central point, wherein each illuminating element includes a base body with a quadrangular base surface, a corner of the base body of each illuminating element lying at least approximately on a line which extends between the center point of the respective illuminating element and the central point, and/or wherein each illuminating element includes a base body with a square base surface, the illuminating elements being arranged on the upper side of the support such that mutually opposite side surfaces of the base body of adjacent illuminating elements extend non-parallel to one another.