Display device and transportation vehicle display system

Abstract

The display device includes a display panel, a backlight module, a fogging element, an optical element, and an optical sensor. The backlight module is disposed on one side of the display panel and includes a light source unit and a light guide plate. The light guide plate guides light of a first wavelength range emitted by the light source unit toward the display panel and has an area that allows light of a second wavelength range to pass through. The fogging element is disposed in the area of ​​the light guide plate. The optical element is disposed corresponding to the area of ​​the light guide plate and is farther away from the display panel than the fogging element. The optical element substantially reflects light of the first wavelength range toward the area of ​​the light guide plate and substantially allows light of the second wavelength range to pass through. The optical sensor is disposed corresponding to the area of ​​the light guide plate and is used to sense light of the second wavelength range that passes through the optical element.

Claims

1. A display device, comprising: a display panel; a backlight module disposed on one side of the display panel, the backlight module comprising: a light source unit for emitting light in a first wavelength range; and a light guide plate disposed corresponding to the light source unit for guiding the light in the first wavelength range toward the display panel, the light guide plate having a region allowing light in a second wavelength range to pass through; a fogging element disposed in the region of the light guide plate; an optical element disposed corresponding to the region of the light guide plate and farther from the display panel than the fogging element, the optical element for substantially reflecting the light in the first wavelength range toward the region of the light guide plate and substantially allowing the light in the second wavelength range to pass through; and an optical sensor disposed corresponding to the region of the light guide plate, the optical sensor for sensing the light in the second wavelength range passing through the optical element.

2. The display device as claimed in claim 1, wherein the light in the first wavelength range includes visible light and the light in the second wavelength range includes infrared light.

3. The display device as claimed in claim 1, wherein the haze of the atomizing element for light in the second wavelength range is less than or equal to 50%.

4. The display device as claimed in claim 1, wherein the atomizing element includes an atomizing film attached to the light guide plate, and the atomizing film has a haze of 40% or greater than or equal to that of light in the first wavelength range.

5. The display device as claimed in claim 1, wherein the atomizing element comprises diffusing particles coated on the light guide plate.

6. The display device as claimed in claim 1, wherein the atomizing element comprises diffusing particles coated on the optical element.

7. The display device as claimed in claim 6, wherein the optical element is attached to the light guide plate.

8. The display device as described in claim 5 or 6, wherein the diffused particles are nanoparticles.

9. The display device as claimed in claim 1, wherein the atomizing element comprises a nanostructured film attached to the light guide plate.

10. The display device as claimed in claim 1, wherein the atomizing element comprises a nanostructure formed on the light guide plate.

11. The display device as claimed in claim 1, wherein the optical element is a multilayer specular reflector, and the haze of the multilayer specular reflector for light in the second wavelength range is less than or equal to 10%.

12. The display device as claimed in claim 1 further includes an atomizing layer, wherein the atomizing layer is disposed between the display panel and the backlight module, and the vertical projection of the area of ​​the light guide plate falls within the atomizing layer.

13. The display device as claimed in claim 1 further includes an optical film, wherein the optical film is disposed on one side of the light guide plate, the optical film has an opening corresponding to the area of ​​the light guide plate, and the atomizing element is located within the vertical projection of the opening of the optical film.

14. A vehicle display system comprising: a display device disposed within a vehicle, the display device comprising: a display panel; a backlight module disposed on one side of the display panel, the backlight module comprising: a light source unit for emitting light in a first wavelength range; and a light guide plate disposed corresponding to the light source unit for guiding the light in the first wavelength range toward the display panel, the light guide plate having a region allowing light in a second wavelength range to pass through; a fogging element disposed in the region of the light guide plate; an optical element disposed corresponding to the region of the light guide plate and further away from the display panel than the fogging element, the optical element substantially reflecting the light in the first wavelength range toward the region of the light guide plate and substantially allowing the light in the second wavelength range to pass through; and an optical sensor disposed corresponding to the region of the light guide plate, wherein the optical sensor is used to sense the light in the second wavelength range passing through the optical element to image an image inside the vehicle.

15. The vehicle display system as claimed in claim 14, wherein the light in the first wavelength range includes visible light and the light in the second wavelength range includes infrared light.

16. The vehicle display system as claimed in claim 14, wherein the fogging element has a fogging degree of less than or equal to 50% for light in the second wavelength range.

17. The vehicle display system as claimed in claim 14, wherein the atomizing element includes an atomizing film attached to the light guide plate, and the atomizing film has a haze of 40% or greater than or equal to that of light in the first wavelength range.

18. The vehicle display system as claimed in claim 14, wherein the atomizing element comprises diffusing particles coated on the light guide plate or the optical element.

19. The vehicle display system as claimed in claim 14, wherein the atomizing element comprises a nanostructured film attached to the light guide plate.

20. The vehicle display system as claimed in claim 14, wherein the atomizing element comprises a nanostructure formed on the light guide plate.

21. The vehicle display system as claimed in claim 14, wherein the optical element is a multilayer specular reflector, and the haze of the multilayer specular reflector for light in the second wavelength range is less than or equal to 10%.

22. The vehicle display system as claimed in claim 14 further includes a fogging layer, wherein the fogging layer is disposed between the display panel and the backlight module, and the vertical projection of the area of ​​the light guide plate falls within the fogging layer.

23. The vehicle display system as claimed in claim 14 further includes an optical film, wherein the optical film is disposed on one side of the light guide plate, the optical film has an opening corresponding to the area of ​​the light guide plate, and the atomizing element is located within the vertical projection of the opening of the optical film.

Images