A vehicular display device includes: a display board for displaying a scale; a liquid crystal display panel including an image display surface for displaying an image, and having an overlapping region in which the image display surface overlaps the display board further rearward than the display board; a light source for illuminating the liquid crystal display panel; and a first light guide body for receiving light from the light source via the liquid crystal display panel and emitting the light. The first light guide body includes: a light receiving part disposed between the overlapping region of the image display surface and the display board, for receiving the light from the light source via the liquid crystal display panel; and a light-emitting part exposed outwardly from the display board as viewed by a viewer, for emitting light from the first light guide body that is received by the light-receiving part.

A control apparatus includes a switch that operates a device, the switch being attached to a vehicle ceiling part, wherein a display able to transmit light from a light source is provided on an operation surface of an operation element of a switch, and in the operation element, an inclined part inclined with an upward slope from a vehicle front toward a vehicle rear is provided, the slope being inclined at an angle at which light radiated from the light source is not visually recognized by an occupant when the light radiated from the light source is reflected on a rearview mirror.

A lighting device includes a light guide that propagates incoming light, and a lighting panel including a lighting region. A front side of the lighting panel excluding the lighting region is configured to prevent transmission of light, the light guide is covered by the lighting panel, the lighting device is configured such that the light emitted from the light guide passes through the lighting region of the lighting panel for illumination, and surfaces of the lighting panel surrounding the light guide are white in color.

A meter ECU changes a display color of a meter display item without changing a luminance of a first backlight of a first display and a display color of a first lamp display item, between when an illuminance detected by an optical sensor is higher than a certain threshold value (step S2, step S3) and when the illuminance is lower than the certain threshold value (step S7, step S8).

An input device is provided which includes: a first light source which emits light to cause a first design to be displayed on a display region: a second light source which emits light to cause a second design different from the first design to be displayed on the display region; a switch which receives an input from a user; and a control circuit which, according to the input received by the switch, (i) controls displaying of a design on the display region, by controlling a lighting state of the first light source and a lighting state of the second light source, and (ii) outputs a control signal corresponding to the input received by the switch, to an external device.

Uniform illumination is provided to a ring-shaped or round instrument panel guage by a light-conducting ring made the exterior surface of which is roughened. The ring is formed to have a light inlet tab that receives illuminating light from a bulb or LED. The ring can have any odd or even-number of light inlet tabs.

A dial plate is provided with a mark layer having translucency, the mark layer including numbers of linear grooves formed on a surface of the mark layer, and a reflective layer that is arranged on a back face side of the mark layer, and reflects light incident from the mark layer side. The reflective layer includes a light transmission area that allows the light emitted from a light source arranged on the back face side to transmit therethrough to a front face side, and displays a display design by the light transmitting through the light transmission area when the light source is turned on. In the reflective layer, at least the light transmission area is composed of pearl ink.

A vehicular display device includes: a display board (25) for displaying a scale; a liquid crystal display panel (53a) including an image display surface (53c) for displaying an image, and having an overlapping region (53d) in which the image display surface (53c) overlaps the display board (25) further rearward than the display board (25); a light source for illuminating the liquid crystal display panel (53a); and a first light guide body (23) for receiving light from the light source via the liquid crystal display panel (53a) and emitting the light.

The first light guide body (23) includes: a light receiving part (23i) disposed between the overlapping region (53d) of the image display surface (53c) and the display board (25), for receiving the light from the light source via the liquid crystal display panel (53a); and

a light-emitting part (23o) exposed outwardly from the display board (25) in a radial direction of the display board (25) as viewed by a viewer, for outputting from the first light guide body (23) the light received by the light-receiving part (23i).

Two separate and differently-colored light sources provide correspondingly-colored light into corresponding light guides that extend part way around the perimeter of a gauge, such as a tachometer dial and adjacent to numerals or digits that correspond to a measured quantity, such as a too-high engine speed range and an energy-saving or eco speed range.

A vehicular display device is to be mounted on a vehicle. The vehicular display device displays information. The vehicular display device may emits near-infrared light including light having an upper-bound wavelength of visible light to a viewing side. The vehicular display device may disguise the light having the upper-bound wavelength of the visible light.