Illumination device and head-up display device

Abstract

The invention provides an illumination device and a head-up display device. The illumination device (100) comprises a plurality of light sources (10), which are arranged in a two dimensional matrix and give off illumination light (L1) to an opposite direction; a condensing lens (20), which is arranged on the exit surface of the light sources (10) and comprises multiple convex lens parts (22) corresponding to the light sources (10) respectively, wherein the convex lens parts (22) converge the illumination light (L1) emitted by the light sources (10); and a collimating lens array (30), which isarranged on the exit surface of the condensing lens (20) and is provided with multiple protruded light exiting surfaces (32) corresponding to the convex lens parts (22). Through the collimating lens array (30), the illumination light (L1) from neighbored convex lens parts (22) is emitted from the protruded light exiting surfaces (32) in parallel light that is not overlapped with each other.

Description

technical field [0001] The present invention relates to a lighting device having a plurality of light sources and a head-up display device including the lighting device. Background technique [0002] Conventionally, there is known a head-up display device (Head Up Display; hereinafter also referred to as a HUD device) in which an original display image formed by transmitting illumination light through a projection member such as a transmissive liquid crystal panel (LCD) is A display image shaped by magnification or the like by a predetermined optical system is projected on a display member such as a windshield of a moving body (for example, a vehicle) for display. The HUD device is mounted on a vehicle such as an automobile, and projects the above-mentioned display image in the field of view of the driver or passenger as an observer during driving. The projection part displays the flat LCD data showing the original image, and the illumination light The display original imag...

AI Technical Summary

Problems solved by technology

In the case of high-output LEDs using a small number of lamps, the amount of lost light increases, which leads to an increase in heat dissipation, an increase in the size of the heat sink, and an increase in the size of the backlight unit. In the case of low-output LEDs using many lamps In the case of LEDs, the number of locations where light loss occurs increases, so if a structure that does not reduce the generation of light loss itself as in the prior art of Patent Documents 1 to 4 is adopted, the number of LED lamps will further increase, and as a result Yes, it leads to an increase in heat dissipation, an increase in the size of the heat sink, and an increase in the size of the backlight unit

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