Head-up display with magnetic field speed detecting means

• US 4,988,976 A
• Filed: 09/06/1989
• Issued: 01/29/1991
• Est. Priority Date: 09/06/1989
• Status: Expired due to Term

• Current Assignee: Ching-Piao Hu
• Original Assignee: Hsing-Tseng Lu
• Inventors: Lu, Hsing-Tseng
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US07/403,756
• Time in Patent Office: 510 Days
• Field of Search: 350/174, 340/705, 340/980, 340/461, 324/174
• US Class Current: 340/461
• CPC Class Codes: B60K 2360/334 Projection means
• CPC Class Codes: B60K 2370/334 Projection means
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60Y 2200/12 Motorcycles, Trikes; Quads; Scooters
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 2027/012 comprising devices for attenuating parasitic image effects
• CPC Class Codes: G02B 2027/014 comprising information/image processing systems
• CPC Class Codes: G02B 2027/0169 Supporting or connecting means other than the external walls
• CPC Class Codes: G02B 27/0018 with means for preventing ghost images anti-reflection coatings G02B1/11
• CPC Class Codes: G02B 27/01 Head-up displays
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G02B 27/0149 characterised by mechanical features G02B27/0176 takes precedence

Abstract

A head-up display (HUD) for automobile or motorcycle use. By using a vacuum fluorscent display and through the double refraction effected by a special lens, the desired instant information values such the speed, time, etc. are enlarged and projected and then accurately displayed on the windshield of an automobile or on the safety helmet worn by a motorcycle rider for fast direct readout. The present invention further comprises an electromagnetic inducer disposed on the tire which correctly calculates the speed of the vehicle regardless of the tire size.

Claims

1. A vehicle head-up display for correctly displaying instant information values at an area visible to the driver in the central portion on the windshield of a vehicle, said display comprising:

an electromagnetic inducer for detecting the changes of magnetic field generated by a plurality of magnetic force generators so as to sense an electromagnetic signal;

the magnetic force generators secured on the wheel transmission shaft of the wheels for measuring the speed of the vehicle in conjunction with the sensing by the electromagnetic inducer;

a counting circuit device comprising microprocessor IC and an interface circuit, which receives the electromagnetic signal via a signal line so as to calculate the speed of the vehicle;

a projection display comprising a transmissive lens of a particular magnification, a fluorescent display lamp, a colored film having a transmissivity of only 70%, a dark colored transparent shield, a housing, a base, and an angle adjustment knob wherein the horizontal image displayed on the fluorescent display lamp is double-refracted by said transmissive lens and projected onto the windshield through said colored film and then reflected to form into the correct image;

a function control box connecting to said projection display via a control function line for transferring the control signal to said counting circuit device, said function control box having a control panel with touch control keys for setting the contents of the informations to be displayed; and

a light colored transparent displaying film having coated with hydrogel for displaying the image while preventing double images and the interference by the light rays coming from outside the vehicle.

2. A vehicle head-up display according to claim 1, wherein the vehicle is an automobile.

3. A vehicle head-up display according to claim 1, wherein said fluorescent display is a displaying lamp having a brightness of at least 600 lux.

4. A vehicle head-up display according to claim 1, wherein said angle adjustment knob can adjust said projection display in the front, rear, up, and down directions.

5. A vehicle head-up display according to claim 1, wherein said counting circuit device can calculate instant information values of the rpm, time, fuel level, temperature, and humidity which are to be displayed.

6. A vehicle head-up display according to claim 1, further comprising:

a thin, light colored transparent displaying board secured above said projection display for preventing the occurrence of double images and the interfering light rays coming from outside the car.

7. A vehicle head-up display according to claim 1, wherein the vehicle is a motorcycle.

8. A vehicle head-up display according to claim 7, further comprising:

a signal converter for transmitting the magnetic signal representing the speed, in wired manner, to a signal receiver provided on a safety helmet; and

a thick, transparent windshield shade provided on said helmet for direct display of the image signal projected thereon.

9. A vehicle head-up display according to claim 8, wherein the magnetic signal transmitted by the signal converter is in wireless manner.