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US-12623539-B2 - Vehicle display apparatus

US12623539B2US 12623539 B2US12623539 B2US 12623539B2US-12623539-B2

Abstract

A vehicle display apparatus includes a display device that emits display light toward a display surface of a vehicle, and a main housing. The display device includes a display including a display screen, a backlight including an LED substrate, and a device housing to which the LED substrate is assembled. The display screen is disposed to be inclined with respect to an optical axis of the emission light. The LED substrate is disposed to face the display screen. The plurality of LED chips are arranged along an inclination of the display screen to be shifted stepwise with respect to the optical axis direction along the optical axis.

Inventors

  • Junichi Ichikawa

Assignees

  • YAZAKI CORPORATION

Dates

Publication Date
20260512
Application Date
20250131
Priority Date
20221214

Claims (8)

  1. 1 . A vehicle display apparatus comprising: a display device that is mounted on a vehicle and emits, as display light, an image to be visually recognized as a virtual image by an occupant of the vehicle toward a display surface provided on the vehicle; and a main housing that accommodates the display device therein and has an opening through which the display light is emitted toward the display surface, wherein the display device includes a display including a display screen capable of displaying the display light, a backlight including an LED substrate having a plurality of LED chips mounted on a substrate, the backlight irradiating the display with emission light, and a device housing accommodating the backlight therein, the display screen is disposed to be inclined with respect to an optical axis of the emission light, the LED substrate is disposed facing the display screen, the plurality of LED chips are arranged along an inclination of the display screen to be shifted stepwise with respect to an optical axis direction along the optical axis, the substrate is formed of a metal material and includes alternately formed facing portions located to face the display screen and connecting portions located to intersect with the facing portions and connecting the facing portions to each other, and the display screen is disposed so as to be inclined with respect to an optical axis of the emission light such that reflected light reflected by the display screen is directed to a side opposite to a side where the opening is located when external light enters the main housing through the opening.
  2. 2 . The vehicle display apparatus according to claim 1 , wherein the substrate is formed in a stepwise shape along an inclination of the display screen, and each of the LED chips is disposed on a surface facing the display screen on the substrate formed in a stepped shape.
  3. 3 . The vehicle display apparatus according to claim 1 , wherein an external space portion formed on a side opposite to the display screen side across the LED substrate is formed stepwise along an inclination of the display screen, and a portion located on the opening side is located so as to protrude toward the display screen side in the optical axis direction with respect to a portion located on a side opposite to the opening side.
  4. 4 . The vehicle display apparatus according to claim 2 , wherein an external space portion formed on a side opposite to the display screen side across the LED substrate is formed stepwise along an inclination of the display screen, and a portion located on the opening side is located so as to protrude toward the display screen side in the optical axis direction with respect to a portion located on a side opposite to the opening side.
  5. 5 . A vehicle display apparatus comprising: a display device that is mounted on a vehicle and emits, as display light, an image to be visually recognized as a virtual image by an occupant of the vehicle toward a display surface provided on the vehicle; and a main housing that accommodates the display device therein and has an opening through which the display light is emitted toward the display surface, wherein the display device includes a display including a display screen capable of displaying the display light, a backlight including an LED substrate having a plurality of LED chips mounted on a substrate, the backlight irradiating the display with emission light, and a device housing accommodating the backlight therein, the display screen is disposed to be inclined with respect to an optical axis of the emission light, the LED substrate is disposed facing the display screen, the plurality of LED chips are arranged along an inclination of the display screen to be shifted stepwise with respect to an optical axis direction along the optical axis, the display device has a radiation plate made of a metal material and including alternately formed facing portions located to face the display screen and connecting portions located to intersect with the facing portions and connecting the facing portions to each other, and the display screen is disposed so as to be inclined with respect to an optical axis of the emission light such that reflected light reflected by the display screen is directed to a side opposite to a side where the opening is located when external light enters the main housing through the opening.
  6. 6 . The vehicle display apparatus according to claim 5 , wherein the radiation plate is formed in a stepwise shape along an inclination of the display screen, and each of the LED chips is disposed together with the substrate on a surface facing the display screen in the radiation plate formed in a stepwise shape.
  7. 7 . The vehicle display apparatus according to claim 5 , wherein an external space portion formed on a side opposite to the display screen side across the LED substrate is formed stepwise along an inclination of the display screen, and a portion located on the opening side is located so as to protrude toward the display screen side in the optical axis direction with respect to a portion located on a side opposite to the opening side.
  8. 8 . The vehicle display apparatus according to claim 6 , wherein an external space portion formed on a side opposite to the display screen side across the LED substrate is formed stepwise along an inclination of the display screen, and a portion located on the opening side is located so as to protrude toward the display screen side in the optical axis direction with respect to a portion located on a side opposite to the opening side.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is a continuation application of International Application No. PCT/JP2023/040353 filed on Nov. 9, 2023 which claims the benefit of priority from Japanese Patent Application No. 2022-199114 filed on Dec. 14, 2022 and designating the U.S., the entire contents of which are incorporated herein by reference. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle display apparatus. 2. Description of the Related Art For example, Japanese Patent No. JP 6 027 727 B2 discloses a vehicle display apparatus including an indicator, a light source that illuminates the indicator, and a retardation plate (λ/4 plate or λ/2 plate) provided for display light emitted by the indicator. Meanwhile, in the vehicle display apparatus described in Japanese Patent No. JP 6 027 727 B2 described above, when external light enters a housing of the device, in a case where the display surface is disposed to be inclined with respect to the optical axis in order to prevent light reflected by the display surface of the indicator mounted in the housing from returning to the eyes of the occupant, there is a possibility that the housing of the indicator becomes large according to the inclination and the entire vehicle display apparatus becomes large. Therefore, there is room for further improvement in terms of mountability to the vehicle. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide a vehicle display apparatus capable of realizing space saving. In order to achieve the above mentioned object, a vehicle display apparatus according to one aspect of the present invention includes: a display device that is mounted on a vehicle and emits, as display light, an image to be visually recognized as a virtual image by an occupant of the vehicle toward a display surface provided on the vehicle; and a main housing that accommodates the display device therein and has an opening through which the display light is emitted toward the display surface, wherein the display device includes a display including a display screen capable of displaying the display light, a backlight including an LED substrate which a plurality of LED chips are mounted on a substrate, the backlight irradiating the display with emission light, and a device housing accommodating the backlight therein, the display screen is disposed to be inclined with respect to an optical axis of the emission light, the LED substrate is disposed facing the display screen, and the plurality of LED chips are arranged along an inclination of the display screen to be shifted stepwise with respect to an optical axis direction along the optical axis. The above and other objects, features, advantages and technical and industrial significance of this invention will be better understood by reading the following detailed description of presently preferred embodiments of the invention, when considered in connection with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating a schematic configuration of a vehicle display apparatus according to an embodiment; FIG. 2 is a diagram illustrating a schematic configuration of a display device constituting the vehicle display apparatus according to the embodiment; and FIG. 3 is a diagram illustrating a schematic configuration of a display device constituting a vehicle display apparatus according to a modification of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment according to the present invention will be described in detail with reference to the drawings. Note that the invention is not limited by the embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same. Embodiment A vehicle display apparatus 1 is applied to a vehicle 400 such as an automobile, and is a head-up display apparatus mounted in an instrument panel (not illustrated) provided on a dashboard of the vehicle 400. As illustrated in FIGS. 1 and 2, the vehicle display apparatus 1 includes an indicator 10 and a control unit (not illustrated), and the indicator 10 includes a display device 100, a mirror 200, and a main housing 300. In addition, the display device 100 includes a display 110 including a display screen 111 capable of displaying display light L2, a backlight 120 including an LED substrate 121 as a light source, and a device housing 130. The vehicle display apparatus 1 reflects the display light L2, which is emitted from the display device 100 toward a display surface 410 provided in the front portion of the vehicle 400, toward the eye point (viewing position) EP side, so that the image reflected on the display surface 410 can be visually recognized as a virtual image Vi viewed overlapping a scene viewed from the eye p