Tachometer device having rotation speed indicative projection light source

• US 20040154394A1
• Filed: 02/05/2004
• Published: 08/12/2004
• Est. Priority Date: 03/04/2002
• Status: Abandoned Application

• Current Assignee: Jui-Yang Lo
• Original Assignee: Jui-Yang Lo
• Inventors: Lo, Jui-Yang
• Application Number:
  US10/771,442
• Publication Number:
  US 20040154394A1
• Time in Patent Office: Days
• US Class Current: 73/491
• CPC Class Codes: B60K 2360/188 Displaying information using colour changes
• CPC Class Codes: B60K 2370/188 Displaying information using colour changes
• CPC Class Codes: B60K 35/29 Instruments characterised by the way in which information is handled, e.g. showing information on plural displays or prioritising information according to driving conditions
• CPC Class Codes: G01P 1/08 Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers

Abstract

A tachometer with a projection light source generating light of a color corresponding to an instant rotational speed of the car engine to indicate to a racer the best time for gear shift switching by changing the color of the generated light. The device includes a micro-processor, a memory device where a color corresponding to a respective speed segment, as well as speed value critical for shift switch are recorded, and a light source device including a switch device, an electric-control loop and a RGB illumination device set. The light source device is controlled by the microprocessor to change the color of the generated light when the speed reaches the critical value pre-set by a user.

Claims

1. A tachometer device with a projection light source changing the color of a generated light according to a rotational speed of an engine. Said light source being provided in an electric circuit included in the meter body, said light source comprising:

a switch device outputting a switch signal or a present signal to an electronic control circuit;

said electronic control circuit receiving a control signal outputted from a microprocessor included in said electric circuit of said tachometer, or receiving said switch signal or said preset signal outputted form switch device, and being capable of collaborating all memory signals with a functional mode and outputting a driving signal to actuate an RGB illumination device set;

an RGB illumination device set appropriately disposed in the inner portion of said tachometer, namely beneath the graduation board of said tachometer for receiving said driving signal outputted from said electronic control circuit;

by outputting from said microprocessor the colors of said light source corresponding to the engine rotational speed which have been preset in a memory, and driving said RGB illumination device set with a synchronizing color mixing version by said electronic control circuit, the color of the projected light may be changed in order according to the preset speed segments thereby the driver is able to be reminded of the present state of his/her car by watching the color change displayed on said graduation board.

2. The tachometer device as claimed in claim 1, wherein said RGB illumination device set is installed on the circuit board behind said graduation board.

3. The tachometer device as claimed in claim 1, wherein said RGB illumination device generates the light of a plurality of colors, at least including red, green, blue, yellow, indigo-blue, purple, and white colors.