Indicating instrument with a gear indicator

• US 20060216675A1
• Filed: 03/10/2006
• Published: 09/28/2006
• Est. Priority Date: 09/10/2003
• Status: Active Grant

• Current Assignee: PREH GmbH (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: PREH GmbH (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Nauth, Jurgen, Ruttiger, Anton
• Granted Patent: US 7,482,912 B2
• Time in Patent Office: Days
• US Class Current: 434/71
• CPC Class Codes: F16H 63/42 Ratio indicator devices
• CPC Class Codes: G09G 3/18 using liquid crystals
• CPC Class Codes: G09G 5/30 Control of display attribute

Abstract

An indicating instrument including at least one display unit including display segments that are used to represent a currently engaged gear and a background surrounding the display segments, and a control circuit configured to apply a first signal having a first polarity to the display segments and a second signal having a second polarity opposite to the first polarity to the background such that the display segments and the background have different contrasts to indicate the currently engaged gear.

Claims

1. An indicating instrument, comprising:

at least one display unit including display segments that are used to represent a currently engaged gear, and a background surrounding the display segments; and

a control circuit configured to apply a first signal having a first polarity to the display segments and a second signal having a second polarity opposite to the first polarity to the background such that the display segments and the background have different contrasts to indicate the currently engaged gear.

2. The indicating instrument according to claim 1, wherein the first polarity of the first signal is a positive polarity so the display segments are displayed as being dark, and the second polarity of the second signal is a negative polarity so the background is highlighted.

3. The indicating instrument according to claim 2, wherein the display unit is connected to a shift control device that determines an optimal shift time and sends a signal to the control circuit indicating the optimal shift time, and

wherein the control circuit reverses the first and second polarities of the first and second signals at or before the optimal shift time so the display segments are highlight and the background is displayed as being dark.

4. The indicating instrument according to claim 3, wherein the control circuit alternately reverses the first and second polarities of the first and second signals so the display unit flashes the currently engaged gear.

5. The indicating instrument according to claim 4, wherein the first and second signals comprise pulse-shaped signals, and the control circuit adjusts a pulse/pause ratio of the first and second signals so the display unit slowly or quickly flashes the currently engaged gear.

6. The indicating instrument according to claim 1, wherein the background includes a plurality of background segments and the second signal includes a plurality of signals each respectively applied to the plurality background segments, and

wherein the control circuit changes a polarity of a predetermined number of the plurality of signals applied to the plurality of background segments such that only a subsection of the display unit flashes.

7. The indicating instrument according to claim 1, wherein the background completely fills the at least one display unit.

8. The indicating instrument according to claim 1, wherein the display segments comprise seven display segments used to represent a numeral corresponding the currently engaged gear.

9. The indicating instrument according to claim 1, wherein the display segments represent a alphanumeric symbol corresponding to the currently engaged gear.

10. The indicating instrument according to claim 1, wherein the display segments represent a graphic symbol corresponding to the currently engaged gear.

11. The indicating instrument according to claim 1, wherein the display unit is part of an instrument cluster for a motorcycle.

12. The indicating instrument according to claim 11, wherein the display unit displays currently engaged gears for a manual transmission in the motorcycle.

13. A method for indicating an optimal shift time for a motor vehicle with a manual transmission, comprising:

determining the optimal shift time using a shift control device included in the motor vehicle;

transmitting a signal corresponding to the optimal shift time to a control circuit controlling an indicating instrument, said indicating instrument having at least one display unit including display segments that are used to represent a currently engaged gear, and a background surrounding the display segments;

applying, via the control circuit, a first signal having a first polarity to the display segments and a second signal having a second polarity opposite to the first polarity to the background such that the display segments and the background have different contrasts to indicate the currently engaged gear; and

alternately reversing, via the control circuit, the first and second polarities of the first and second signals so the display unit flashes the currently engaged gear to indicate the optimal shift time.

14. The method according to claim 13, wherein the first and second signals comprise pulse-shaped signals, and the control circuit adjusts a pulse/pause ratio of the first and second signals so the display unit slowly or quickly flashes the currently engaged gear.

15. An indicating instrument, comprising:

at least one display unit including a first display portion configured to indicate a currently engaged gear, and a second display portion surrounding the first display portion; and

a control circuit configured to apply a first signal to the first display portion and a second signal to the second display portion such that the first and display portions have a different illumination characteristic to thereby display the currently engaged gear.

16. The indicating instrument according to claim 15, wherein the first signal has a first polarity and the second signal has a second polarity that is opposite to the first polarity so the first display portion is displayed as being dark, and the second display portion is highlighted.

17. The indicating instrument according to claim 16, wherein the display unit is connected to a shift control device that determines an optimal shift time and sends a signal to the control circuit indicating the optimal shift time, and

wherein the control circuit reverses the first and second polarities of the first and second signals at or before the optimal shift time so the display segments appear bright and the background appears dark.

18. The indicating instrument according to claim 16, wherein the control circuit alternately reverses the first and second polarities of the first and second signals so the display unit flashes the currently engaged gear.

19. The indicating instrument according to claim 15, wherein the first and second signals comprise pulse-shaped signals having different polarities, and the control circuit adjusts a pulse/pause ratio of the first and second signals so the display unit slowly or quickly flashes the currently engaged gear.

20. The indicating instrument according to claim 15, wherein the first display portion includes at least one of display segments representing a numeral corresponding the currently engaged gear, an alphanumeric symbol corresponding to the currently engaged gear, or a graphic symbol corresponding to the currently engaged gear.

21. The indicating instrument according to claim 15, wherein the display unit is part of an instrument cluster for a motorcycle, and the display unit displays currently engaged gears for a manual transmission in the motorcycle.