Embodiments disclosed herein relate to a heads-up display visor for a vehicle, such as an automobile, to provide driver assistance information to the driver. Features include a display screen that is sized and positioned relative to the driver's conventional sun visor, so as to eliminate the need to project images onto the windshield and/or to have a projector located on the vehicle dashboard. In certain embodiments, the heads-up display visor is portable, and is affixed to the driver's conventional sun visor by a clip, thereby allowing a driver to move the device from one vehicle to another.

A light emitting device emitting an output light includes a light adjustment structure. A sub light is defined as the output light corresponding to an azimuth angle, a first value L1 is a sum of a luminance of the sub light corresponding to a polar angle from 115 to 125 degrees, a second value L2 is a sum of a luminance of the sub light corresponding to a polar angle from 95 to 105 degrees, a third value L3 is a sum of a luminance of the sub light corresponding to a polar angle from 75 to 85 degrees, a fourth value L4 is a sum of a luminance of the sub light corresponding to a polar angle from 55 to 65 degrees. The first value L1, the second value L2, the third value L3 and the fourth value L4 satisfy L3<L2, and 1.23(L1*L3)/(L2*L4)2.92.

The information display apparatus has a housing with an opening and a transparent cover formed on the opening, the includes image-light generating means configured to housing generate image light that displays the image information and an optical system configured to allow a driver of the vehicle to recognize image information based on the image light from the image-light generating means as a virtual image in front of the windshield. When S-polarized light on the windshield is assumed to be a first polarized wave while polarized light that orthogonally crosses the S-polarized light in a polarizing direction is assumed to be a second polarized wave, the image-light generating means is configured to generate the image light made of the first polarized wave, and a transmittance/reflectance control means blocks a part of the first polarized wave and the second polarized wave of incident external light entering the housing from the opening.

A method for improving readability of a display inside a motorized object comprises applying a polarization means on a side window of a motorized object, wherein an ambient incident light ray comes through the side window and is reflected by a surface of a display inside the motorized object to form a reflected light ray, and substantially filtering out display incident light S-polarization and allowing display incident light P-polarization to pass through. The polarization means has a linear polarization reflecting or absorbing direction that is substantially parallel to the plane of the surface of the display. A display readability enhancing system comprises the polarization means. When ambient light passes through the window and shines onto the interior display, the dominant light polarization is p-polarization for the interior display with minimum surface reflectivity upon reflecting from the interior display, resulting in good display visibility under strong ambient light conditions.

A display device includes a housing, an electro-optic layer, a display to display at least a portion of a rearward image, and an actuator to switch the electro-optic layer between first and second postures. In the first posture, the display displays the portion of the rearward image. In the second posture, the reflectivity of the incident light varies between at least first and second values based on at least one of a first illuminance or a second illuminance, and the second value is larger than the first value. In the first posture, the reflectivity of the incident light is equal to or more than the second value. The first illuminance indicates brightness around a vehicle and is detected by a sensor. The second illuminance indicates intensity of light emitted on a front surface of the display device and is detected by another sensor.

A windscreen display system for a motor vehicle includes a head-up display device. The head-up display device includes a projection device for emitting a projection light beam with a first item of image information towards a first display region of a windscreen so that it is reflected there and can be perceived in an eye region, and a transparent covering for protecting the projection device, the covering having a cover pane and a first polarization filter, the first polarization filter transmitting light with a first polarization direction and fully reflecting light with a second polarization direction.

A display device is configured to be installed in a vehicle. The display device includes: a display on which a rear image of the vehicle is configured to be displayed; a reflectance control device configured to change a reflectance of incident light; and a control circuit configured to control the reflectance. The reflectance control device includes a first part and a second part, with the first part being positioned in a first region overlapping a display surface of the display when viewed in a normal direction, and the second part being positioned in a second region surrounding the first region when viewed in the normal direction. When the rear image of the vehicle is not displayed, the control circuit controls the reflectance control device such that a second reflectance of the second part is lower than a first reflectance of the first part.

A light emitting device emitting an output light includes an optical structure. A sub light is defined as the output light corresponding to an azimuth angle, a first value L1 is a sum of a luminance of the sub light corresponding to a polar angle from 115 to 125 degrees, a second value L2 is a sum of a luminance of the sub light corresponding to a polar angle from 95 to 105 degrees, a third value L3 is a sum of a luminance of the sub light corresponding to a polar angle from 75 to 85 degrees, a fourth value L4 is a sum of a luminance of the sub light corresponding to a polar angle from 55 to 65 degrees. The first value L1, the second value L2, the third value L3 and the fourth value L4 satisfy L3L2, and (L2+L3)>(L1+L4).

According to one embodiment, a display system includes an external light sensor, a display panel, a viewing angle control panel including a liquid crystal layer containing liquid crystal molecules twist-aligned, configured such that a drive voltage applied to the liquid crystal layer is controlled based on an external light intensity detected by the external light sensor, and a polarization axis rotation element disposed between the viewing angle control panel and the display panel. The drive voltage when the external light intensity is less than a threshold value is greater than the drive voltage when the external light intensity is greater or equal to than the threshold value.

A reflectance/transmittance of an optical device disposed at a position through which image light emitted from a liquid crystal display displaying an icon passes is changed according to an anti-glare level to achieve anti-glare of the reflected image. A color of the icon displayed on the liquid crystal display is adjusted such that the higher the transmittance of the optical device is, the lower the lightness is, so that the icon of a similar color is visually recognized regardless of the reflectance/transmittance of the optical device.