发明名称 |
Vehicle display device |
摘要 |
A vehicle display device such as a speed meter including indicators, many segments illuminated in two or more colors by plural LEDs and an indicator control circuit. The indicators dispose the segments so as to display a variable such as a car speed in a bar graph or in the form of a number. The indicator control circuit displays the variable by controlling the lighting of the LEDs and changes an emitted light color of indication based on a fixed color changing reference value in accordance with a value of the variable. The control circuit controls a duty ratio of a supply current or a current value in a predetermined set value range determined on the basis of the color changing reference value. Namely, brightness of the emitted light color before a color change is gradually decreased, while brightness of the emitted light color after the color change is gradually increased.
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申请公布号 |
US5815072(A) |
申请公布日期 |
1998.09.29 |
申请号 |
US19970890304 |
申请日期 |
1997.07.09 |
申请人 |
TOYODA GOSEI CO., LTD. |
发明人 |
YAMANAKA, OSAMU;TAMAKI, MAKOTO;YASUKAWA, TAKEMASA;SUGIHARA, HIROSHI;NODA, KAZUSHI;SANO, YOSHIO;TANABE, TETSUO |
分类号 |
B60K35/00;B60Q3/04;G01D1/18;G01D7/00;G01P1/08;(IPC1-7):B60Q1/00 |
主分类号 |
B60K35/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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