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Lamp unit

A technology for lamps, spatial light modulators, used in headlights, lighting and heating equipment, transportation and packaging, etc., to solve the problem of shadows or glare being less pronounced, blurry, etc.

Inactive Publication Date: 2020-07-07
KOITO MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In addition, in the spatial light modulator described in the above-mentioned "Patent Document 1", even if a foreign matter adheres to the light-transmitting plate, the position of the light-transmitting plate is displaced from the rear focal point of the projection lens to the front side of the unit. The image of foreign objects projected by the part becomes a blurred image with less pronounced shadows or glare

Method used

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Examples

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Embodiment Construction

[0135] Hereinafter, embodiments of the invention of the present application will be described using the drawings.

[0136] figure 1 Is a perspective view showing a lamp unit 10 according to an embodiment of the invention of the present application, figure 2 Yes figure 1 The view in the direction of II. In addition, image 3 Yes figure 2 The section of line III-III, Figure 4 Yes figure 2 The view in the IV direction. In addition, Figure 5 Yes Figure 4 The V direction view, Image 6 Yes Figure 4 The VI direction of the view, Figure 7 Yes Figure 4 VII direction view.

[0137] In these figures, the direction denoted by X is the "front of the unit", the direction denoted by Y is the "left" orthogonal to the "front of the unit" ("right" in the front view unit), and it is denoted by Z The direction is "above". It is the same in other figures.

[0138] The lamp unit 10 of this embodiment is installed in Figure 14 It is used in the state of the vehicle lamp 100 shown in a side se...

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Abstract

The invention provides a lamp unit with a reflective spatial light modulator, which can effectively inhibit unexpected shadows or glare in a light distribution pattern. An opening (40Aa) that surrounds a light-transmitting plate (30C) of the spatial light modulator is formed in a vertical surface section (40A) of a holder (40) that supports the spatial light modulator on the front side of the unitfrom the spatial light modulator (30), and a light-transmitting cover (36) that covers the opening from the front side of the unit is supported on the vertical surface section. As a result, foreign matter is prevented from adhering to the light-transmitting plate of the spatial light modulator in advance. On the other hand, even if foreign matter adheres to the light-transmitting cover, the light-transmitting cover is located at a position farther from the reflection control unit (30A) toward the front side of the cell than the light-transmitting plate, so that the image of the foreign matterprojected by the projection lens (72) becomes a substantially blurred image, thereby effectively suppressing the occurrence of unintended shadows or glare in the light distribution pattern.

Description

Technical field [0001] The present invention relates to a lamp unit equipped with a reflective spatial light modulator. Background technique [0002] Currently, as an in-vehicle lamp unit, there is known a lamp unit constructed in such a way that light from a light source reflected by a spatial light modulator is irradiated to the front of the unit via optical components such as a projection lens. [0003] In "Patent Document 1", as a spatial light modulator of such a lamp unit, the following spatial light modulator is described, which is provided with a plurality of reflecting elements (micromirrors 31) arranged in order to reflect light from a light source The reflection control section (display section 32) and the light-transmitting plate (transparent member 33) arranged on the front side of the unit than the reflection control section. [0004] At this time, the spatial light modulator described in the "Patent Document 1" is configured to seal the space between the reflection co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S41/25F21S41/39F21S45/42F21S43/31F21S43/20F21W107/10
CPCF21S41/25F21S41/39F21S45/42F21S43/31F21S43/20F21W2107/10
Inventor 佐藤隆芳本多贵彦
Owner KOITO MFG CO LTD