Head-up display device and method for controlling a head-up display device
The head-up display device optimizes light distribution by controlling light source areas and intensities for virtual and real images, addressing light waste and brightness inconsistencies.
DE102025106431A1Pending Publication Date: 2025-08-28NIPPON SEIKI CO LTD
Patent Information
- Application Number
- DE102025106431
- Authority / Receiving Office
- DE · DE
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-02-26
- Filing Date
- 2025-02-20
- Publication Date
- 2025-08-28
AI Technical Summary
Technical Problem
Existing head-up display devices waste light when displaying both virtual and real images due to inefficient light orientation, leading to reduced light utilization and brightness differences between image types.
Method used
A head-up display device with a control unit that adjusts the area and intensity of light sources to optimize light distribution for both virtual and real images, ensuring that light is directed only where it is needed and minimizing waste.
Benefits of technology
The solution prevents light waste and maintains consistent brightness between virtual and real images, improving overall light efficiency and user experience.
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Smart Images
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Abstract
[Task] To avoid wasting the light emitted by the pixels when displaying one of the real image or the virtual image for the other image. [Solution] A backlight 11, a display device 12, a polarization control element 122 that switches the polarization state of the display light, an imaging optical system 13 that, on the one hand, forms a virtual image VI by radiating a first display light L1 in a first polarization state from an emission opening 17 along a first optical path OP1 having a first optical path length, and, on the other hand, forms a real image RI by radiating a second display light L2 in a second polarization state along a second optical path OP2 having a second optical path length longer than the first optical path length (see Fig.2) emitted from the emission opening, and a control unit 15 which controls the polarization state of the display light by the polarization control element and the switching on and off of each of the light sources, wherein the control unit controls the area of those light sources which are illuminated more than a predetermined intensity when the real image RI is displayed, to make it larger than the area of those light sources which are illuminated more than a predetermined intensity when the virtual image VI is displayed.
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Citation Information
Patent Citations
2023-148856