Integrated Automotive Lamp Optical Element for Compact Stray-Light Control
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Solution Overview
Problem
Existing automotive lamp modules are large in size, complex in structure, difficult to install, require high manufacturing costs, and suffer from optical system inaccuracies and stray light due to the distance and alignment requirements between primary and secondary optical elements.
Innovation Solution
An automotive lamp optical element with a light-incident portion, transmission portion, and light-emitting portion, where the transmission portion's cross-section area increases, and side surfaces are coated with a light-absorbing layer, with the light-emitting portion featuring a convex surface for total reflection, eliminating stray light and simplifying installation and manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a primary optical element and a secondary optical element are used in combination, then the light distribution performance is improved, but the size of the automotive lamp module increases
Solution Approach 1:
The patent merges the primary optical element (reflector) and secondary optical element (lens) into a single integrated optical element. The reflector and lens are formed as one piece with a reflective portion and a light-transmitting portion, eliminating the need for separate components and reducing the overall module size while maintaining optical performance
Solution Approach 2:
The integrated optical element is segmented into different functional regions: a reflective portion with a reflective layer for reflecting light, and a light-transmitting portion without the reflective layer for transmitting light. This segmentation allows different optical functions to be performed within a single compact component
2Manufacturing precision
If multiple optical elements are positioned and installed with accessories, then the optical function is achieved, but the installation complexity increases
Solution Approach 1:
The patent combines multiple optical elements (reflector and lens) into a single integrated optical element, eliminating the need for mounting brackets and positioning accessories. This reduces installation complexity while ensuring accurate relative positioning through the integrated structure itself
3Manufacturing precision
If the distance between primary optical element and secondary optical element is increased, then the light distribution performance is improved, but the module size increases
Solution Approach 1:
The patent merges the reflector and lens into a single integrated optical element, eliminating the gap or distance that would exist between separate components. The light reflects off the reflective portion and immediately passes through the light-transmitting portion of the same element, achieving optical functionality without requiring additional space
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 compact, easy-to-install automotive lamp module with high optical accuracy, low dimming difficulty, reduced manufacturing costs, and no stray light, enhancing driving safety and aesthetics.
Implementation Method 1
the side surfaces of the transmission portion each are coated with a light absorbing layer
Implementation Method 2
the left and right side surfaces of the light-emitting portion are gradually converged toward the optical axis direction in the light transmission direction, so that light emitted to the left and right side surfaces of the light-emitting portion can be totally reflected
Data Source
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Figure 5
AI summary
Provided are an automotive lamp optical element, an automotive lamp module and a vehicle. The automotive lamp optical element includes a light-incident portion (1), a transmission portion (2) and a light-emitting portion (3) connected in sequence. The light-incident portion (1) is provided with at least one light-incident structure (11) configured to converge light. An area of a cross section of the transmission portion (2) gradually increases in a light transmission direction. A light-emitting convex surface (31) is formed on one end of the light-emitting portion (3) facing away from the transmission portion (2). The automotive lamp module includes the above automotive lamp optical element, and further includes at least one light source (200). The at least one light source is disposed in one-to-one correspondence with the at least one light-incident structure (11).