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Image projection device and vehicle lamp

An image projection and pattern technology, applied in projection devices, optics, instruments, etc., can solve the problems of reducing the wiring pattern on the circuit board, increasing the number of electrostatic protection elements 3, and reducing the miniaturization of the circuit board. the effect of

Pending Publication Date: 2022-01-14
KOITO MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, since the number of wiring patterns for driving the digital micromirror device is large in the image projection device, the number of electrostatic protection elements 3 mounted therein also increases.
Therefore, it is necessary to reduce the density of the wiring pattern on the circuit board and ensure the area where the electrostatic protection device 3 is mounted, so that the miniaturization of the circuit board becomes difficult.

Method used

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  • Image projection device and vehicle lamp
  • Image projection device and vehicle lamp
  • Image projection device and vehicle lamp

Examples

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no. 1 approach

[0063] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or equivalent components, members, and processes shown in the drawings are assigned the same reference numerals, and redundant descriptions are appropriately omitted. figure 1 It is a schematic perspective view showing a configuration example of the vehicle lamp 100 according to the present embodiment. figure 1 The illustrated vehicle lamp 100 includes an image projection device 10 , a light source unit 20 , a reflector 30 , a projection lens 40 , and a heat sink 50 , and projects an image onto a projection surface 60 .

[0064]The image projection device 10 is a device that controls the reflection direction of in-plane light based on ON information and OFF information included in projected image information, and reflects light irradiated from the light source unit 20 as projection light Lon and shielding light Loff. The projection light Lon is irrad...

no. 2 approach

[0119] Next, use Figure 8 A second embodiment of the present invention will be described. Explanation of content overlapping with the first embodiment will be omitted. Figure 8 is a diagram showing the image projection device 10 of the present embodiment, Figure 8 (a) is a partially enlarged photograph showing a state where the mirror mounting substrate 101a and the power supply mounting substrate 101b are connected by a flexible cable 108, Figure 8 (b) is Figure 8 Partial enlarged view around the electrostatic protection element 122 in (a).

[0120] exist Figure 8 In the example shown in (a), the flexible cable 108 includes 39 single-ended wirings 108b and 108d, and 30 signal wiring patterns 121b and 121d are formed on the mirror mounting substrate 101a and the power supply mounting substrate 101b, respectively. Used as ESD protection element 122 Figure 7 In the shown element, since the electrostatic protection elements 122 are mounted on each of the four wiring ...

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Abstract

The invention provides an image projection device and a vehicle lamp, which can protect electronic components from static electricity even when a flexible cable is connected, and can realize miniaturization of a circuit board. The image projection apparatus projects an image by reflecting light from a digital micromirror device provided with a plurality of minute mirrors, and is provided with: a mirror mounting substrate (101a) on which the digital micromirror device is mounted; a power source mounting substrate (101b) formed separately from the mirror mounting substrate (101a); a flexible cable (108) that electrically connects the mirror mounting substrate (101a) and the power supply mounting substrate (101b); signal wiring patterns (121b, 121d) electrically connected to the flexible cable (108) are formed on the mirror mounting substrate (101a) and the power supply mounting substrate (101b), and an electrostatic protection element (122) connected to the plurality of signal wiring patterns (121b, 121d) together is provided.

Description

technical field [0001] The present invention relates to an image projection device and a vehicle lamp, and more particularly to an image projection device and a vehicle lamp that project an image by reflecting light using a digital micromirror device provided with a tiny mirror. Background technique [0002] In recent years, with the development of driving assistance technology and automatic driving technology for vehicles, the need to transmit predetermined actions or information of the vehicle to the outside of the vehicle has also been discussed. As a method of presenting information to the outside of a vehicle, a method has been proposed in which an image projection device is mounted on a vehicle lamp to project an image onto a road surface or the like (for example, refer to Patent Document 1). In the image projection device and vehicle lamp described in Patent Document 1, an image is projected by reflecting light by a digital micromirror device (DMD: Digital Mirror Devi...

Claims

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Application Information

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IPC IPC(8): G03B21/00G03B21/14
CPCG03B21/008G03B21/14
Inventor 斋藤一树门胁崇弘
Owner KOITO MFG CO LTD
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