Vehicle Pointer Light Leakage Suppression
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Solution Overview
Problem
Existing vehicle display device pointers face challenges in suppressing light leakage to the dial plate, which affects visibility and design quality.
Innovation Solution
A vehicle display device pointer design featuring a translucent pointer with a light guide, a lightproof first shielding member covering the pointer and light guide from the front and lateral sides, and a lightproof second shielding member covering the pointer and light guide from the back side, with protrusions that engage with the first shielding member to close gaps and prevent light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light source is disposed on the back side of the dial plate to illuminate the pointer, then the visibility of the pointer is improved, but light leaks to the dial plate causing reduced visibility and design quality
Solution Approach 1:
The patent introduces light-shielding members as intermediary elements between the light source and the dial plate. These members (first light-shielding member covering the proximal end portion and light guide from the front side, and second light-shielding member covering them from the back side) act as mediators that block harmful light leakage while allowing the light to reach the pointer for illumination, thus resolving the contradiction between improving pointer visibility and preventing light leakage to the dial plate.
2Object-generated harmful factors
If shielding members are added to prevent light leakage, then light leakage to the dial plate is suppressed, but the device complexity increases
Solution Approach 1:
The patent merges multiple functions into the light-shielding members. These members simultaneously serve as light shields to prevent light leakage, structural supports to hold the pointer and light guide in position, and gap-closing elements to seal the space between the pointer and housing. By combining these functions into single components rather than using separate elements for each function, the patent reduces overall device complexity while still achieving effective light leakage suppression.
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
Effectively suppresses light leakage to the dial plate, enhancing visibility and design aesthetics by ensuring that light emission is contained within the pointer's structure.
Implementation Method 1
a light guide connecting the pointer main body and the shaft; the pointer main body emits light by light emitted from a light source disposed on a back side of the dial plate and incident on the shaft
Implementation Method 2
a lightproof first shielding member that covers a proximal end portion of the pointer main body and the light guide from a front side and a lateral side; and a lightproof second shielding member that covers the proximal end portion of the pointer main body and the light guide from a back side
Data Source
AI summary
A vehicle display device pointer includes a translucent pointer that has a pointer main body disposed on a front side of a dial plate having a penetration hole and extending along the dial plate, a shaft protruding toward the penetration hole, and a light guide connecting the pointer main body and the shaft; a lightproof first shielding member that covers a proximal end portion of the pointer main body and the light guide from a front side and a lateral side; and a lightproof second shielding member that covers the proximal end portion of the pointer main body and the light guide from the back side. The pointer main body emits light by light emitted from a light source and incident on the shaft, and the second shielding member has protrusions that protrude toward the front side, and close gaps.