Head-Up Display Local Dimming with Biconic Lens Array
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Solution Overview
Problem
Current head-up displays (HUDs) consume excessive energy and lack improved clarity, necessitating a more efficient and clearer solution for vehicular and non-vehicular applications.
Innovation Solution
A head-up display assembly featuring a printed circuit board with light emitting elements and a biconic lens array, where each biconic lens has a first and second aspheric portion with customized radii and thickness, aligned with LEDs to enhance light collimation and reduce power consumption through local dimming capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional HUDs use standard lighting elements and optics, then the display is visible, but energy consumption is excessive
Solution Approach 1:
The HUD divides the display into multiple independently controllable zones corresponding to individual LED elements. Each zone can be independently dimmed or activated based on display requirements, allowing selective illumination rather than full-screen lighting, thereby reducing overall energy consumption while maintaining necessary visibility.
Solution Approach 2:
The patent implements local dimming capability where different regions of the HUD display have different illumination levels. Areas requiring high visibility can maintain full brightness while other areas can be dimmed, creating non-uniform illumination patterns that reduce total energy consumption without compromising critical display information.
2Measurement precision
If conventional HUDs use standard optics, then the display is visible, but image clarity is insufficient
Solution Approach 1:
The patent employs biconic lenses with curved surfaces instead of flat or simple spherical optics. The biconic shape provides superior light collimation and focuses light more precisely onto the display elements, enhancing image clarity and sharpness while managing the complexity through a systematic lens array configuration.
Solution Approach 2:
The patent replaces conventional mechanical optical systems with a distributed array of biconic lenses, each precisely aligned with corresponding LED elements. This substitution of the optical system achieves improved light distribution and image clarity through a modular approach that manages system complexity.
3Loss of energy
If individual LED control is implemented for local dimming, then energy efficiency improves, but device complexity increases
Solution Approach 1:
The HUD control system is segmented to match the LED element arrangement, with each LED or small group of LEDs controllable as an independent zone. This segmentation allows granular control for local dimming while using a modular control architecture that reduces overall system complexity compared to full individual element control.
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 provides improved image clarity and reduced power consumption by optimizing light collimation and allowing individual control of LEDs, resulting in enhanced display contrast and energy efficiency.
Implementation Method 1
Each one of the plurality of biconic lenses is aligned with a different one of the plurality of light emitting elements. Light emitted by the plurality of light emitting elements passes through the plurality of biconic lenses and illuminates the display.
Data Source
AI summary
A head-up display assembly including a printed circuit board with a plurality of light emitting elements. A display is illuminated by the plurality of light emitting elements. A biconic lens array is between the printed circuit board and the display. The biconic lens array includes a plurality of biconic lenses. Each one of the plurality of biconic lenses is aligned with a different one of the plurality of light emitting elements. Light emitted by the plurality of light emitting elements passes through the plurality of biconic lenses and illuminates the display.