HEAD UP DISPLAY, VEHICLE AND CONTROLLING METHOD OF HEAD UP DISPLAY

• US 20130181887A1
• Filed: 01/12/2012
• Published: 07/18/2013
• Est. Priority Date: 01/12/2012
• Status: Active Grant

• Current Assignee: HTC Corporation
• Original Assignee: HTC Corporation
• Inventors: Yang, Shu-Hsiang, Lee, Bing-Yen
• Granted Patent: US 9,372,343 B2
• Time in Patent Office: Days
• US Class Current: 345/7
• CPC Class Codes: B60K 2370/1529 Head-up displays
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60K 35/23 Head-up displays [HUD] optical aspects of head-up displays G02B27/01
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 27/01 Head-up displays
• CPC Class Codes: G02F 1/133331 Cover glasses
• CPC Class Codes: G02F 2203/62 Switchable arrangements whereby the element being usually not switchable

Abstract

A head up display including a casing, a control circuit board, a display panel, and a plate is provided. The control circuit board is disposed in the casing. The display panel is disposed in the casing and electrically connected to the control circuit board. The plate is fixed to the casing and covers the display panel. The transmittance of the plate is capable of being changed, so that an image displayed on the display panel is projected out through the plate, or external light is stopped from illuminating the display panel through the plate. Besides, a vehicle having the head up display and a controlling method of the head up display are provided as well.

Claims

1. A head up display comprising:

a casing;

a control circuit board disposed in the casing;

a display panel disposed in the casing and electrically connected to the control circuit board; and

a plate fixed to the casing and covering the display panel, wherein transmittance of the plate is capable of being changed, such that an image displayed on the display panel is projected out through the plate, or external light is stopped from illuminating the display panel through the plate.

2. The head up display as recited in claim 1, wherein the plate is a liquid crystal panel.

3. The head up display as recited in claim 1, wherein when the plate is supplied with power, the transmittance of the plate increases, and when the plate stops being supplied with the power, the transmittance of the plate decreases.

4. The head up display as recited in claim 1, wherein the plate is electrically connected to the control circuit board, and the control circuit board is capable of transmitting a control signal to the plate, so as to change the transmittance of the plate.

5. The head up display as recited in claim 1, wherein the plate has a light emitting surface, the light emitting surface is a convex surface, and the image displayed on the display panel is projected out through the light emitting surface and is enlarged.

6. The head up display as recited in claim 1, wherein the plate is fixed into the casing, the casing has an opening, and the opening exposes the plate.

7. The head up display as recited in claim 1, wherein the casing has an opening, the opening exposes the display panel, and the plate is fixed onto the casing and covers the opening.

8. The head up display as recited in claim 1, wherein transmittance of one region of the plate increases relative to transmittance of the other region of the plate, such that light emitted from the display panel is projected out through the region of the plate and forms patterns or letters.

9. A vehicle comprising:

a body having a windshield; and

an electronic system comprising;

a head up display comprising;

a casing fixed into the body;

a control circuit board disposed in the casing;

a display panel disposed in the casing and electrically connected to the control circuit board; and

a plate fixed to the casing and covering the display panel, wherein transmittance of the plate is capable of being changed, such that an image displayed on the display panel is projected to the windshield through the plate, or external light is stopped from illuminating the display panel through the plate.

10. The vehicle as recited in claim 9, wherein the display is a liquid crystal display.

11. The vehicle as recited in claim 9, wherein when the plate is supplied with power, the transmittance of the plate increases, and when the plate stops being supplied with the power, the transmittance of the plate decreases.

12. The vehicle as recited in claim 9, wherein the plate is electrically connected to the control circuit board, and the control circuit board is capable of driving the plate, so as to change the transmittance of the plate.

13. The vehicle as recited in claim 12, wherein the electronic system further comprises:

a vehicle bus disposed in the body; and

a brightness sensing module disposed in the body and electrically connected to the vehicle bus, wherein the brightness sensing module is capable of uploading a brightness value sensed by the brightness sensing module to the vehicle bus, and the control circuit board is capable of driving the plate according to the brightness value downloaded from the vehicle bus, so as to change the transmittance of the plate.

14. The vehicle as recited in claim 12, wherein the electronic system further comprises:

a vehicle bus disposed in the body; and

a temperature sensing module disposed in the body and electrically connected to the vehicle bus, wherein the temperature sensing module is capable of uploading temperature sensed by the temperature sensing module to the vehicle bus, and the control circuit board is capable of driving the plate according to the temperature downloaded from the vehicle bus, so as to change the transmittance of the plate.

15. The vehicle as recited in claim 9, wherein the plate has a light emitting surface, the light emitting surface is a convex surface, and the image displayed on the display panel is projected out through the light emitting surface and is enlarged.

16. The vehicle as recited in claim 9, wherein the plate is disposed into the casing, the casing has an opening, and the opening exposes the plate.

17. The vehicle as recited in claim 9, wherein the casing has an opening, the opening exposes the display panel, and the plate is disposed onto the casing and covers the opening.

18. The vehicle as recited in claim 9, wherein transmittance of one region of the plate increases relative to transmittance of the other region of the plate, such that light emitted from the display panel is projected out through the region of the plate and forms patterns or letters.

19. A controlling method of a head up display suitable for a head up display, the head up display comprising a display panel and a plate, the plate covering the display panel, the controlling method comprising:

changing transmittance of the plate, such that an image displayed on the display panel is projected out through the plate, or external light is stopped from illuminating the display panel through the plate.

20. The controlling method of the head up display as recited in claim 19, wherein the step of changing the transmittance of the plate comprises:

supplying power to the plate to increase the transmittance of the plate, or stop supplying the power to the plate to decrease the transmittance of the plate.

21. The controlling method of the head up display as recited in claim 19, wherein the step of changing the transmittance of the plate comprises:

driving the plate through a control circuit board, so as to change the transmittance of the plate, wherein the control circuit board is electrically connected to the plate and the display panel.

22. The controlling method of the head up display as recited in claim 19, wherein the step of changing the transmittance of the plate comprises:

changing the transmittance of the plate according to a brightness value sensed by a brightness sensing module.

23. The controlling method of the head up display as recited in claim 19, wherein the step of changing the transmittance of the plate comprises:

changing the transmittance of the plate according to temperature sensed by a temperature sensing module.