Multiple-force, dynamically-adjusted, 3-D touch surface with feedback for human machine interface (HMI)

• US 9,372,538 B2
• Filed: 09/28/2012
• Issued: 06/21/2016
• Est. Priority Date: 09/28/2012
• Status: Active Grant

• Current Assignee: Denso International America Incorporated (DENSO Corporation)
• Original Assignee: Denso International America Incorporated (DENSO Corporation)
• Inventors: Pala, Silviu, Miyata, Manabu
• Primary Examiner(s): EURICE, MICHAEL
• Application Number:
  US13/630,283
• Publication Number:
  US 20140092025A1
• Time in Patent Office: 1,362 Days
• Field of Search: 345/206, 701/1, 715/702
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 2203/04809 Textured surface identifying touch areas, e.g. overlay structure for a virtual keyboard
• CPC Class Codes: G06F 3/016 Input arrangements with force or tactile feedback as computer generated output to the user
• CPC Class Codes: G06F 3/04144 using an array of force sensing means position sensing using the local deformation of sensor cells G06F3/0447

Abstract

A control interface system for a vehicle includes an input module, a feedback module, and a system controller. The input module has a touchscreen and a control icon arranged thereon. The feedback module includes a pressure sensor in communication with the input module. The pressure sensor provides a sensor signal to the input module indicative of an applied force on the touchscreen. The system controller is in communication with the pressure sensor through the input module. The system controller provides at least one of a haptic feedback, an audible feedback, and a visual feedback, where the feedback is indicative of one of a selection mode, a slow change mode, and a fast change mode.

Claims

1. A control interface system for a vehicle comprising:

a touchscreen and a selectable control icon arranged thereon, the touchscreen is a vehicle touchscreen and the control icon is configured for setting a target cabin temperature;

a pressure sensor configured to generate a sensor signal indicative of an applied force on the touchscreen; and

a system controller in communication with the pressure sensor to receive the sensor signal, wherein the system controller provides at least one of a haptic feedback, an audible feedback, and a visual feedback, wherein the feedback is indicative of one of a search mode, a selection mode, a slow change mode in which controlled features change slow, and a fast change mode in which controlled features change fast;

wherein;

the system controller provides feedback indicative of the search mode when the applied force is within a first predetermined force level range that is a tracking range, and the system controller displays on the touchscreen an image opposite to the applied force and moves the image about the touch screen to track movement of the applied force about the touch screen;

the system controller enters a target cabin temperature change mode when the applied force is within an active area of the display screen and within the first predetermined force level range, the target cabin temperature is not changed unless the applied force is greater than the first predetermined force level range;

the system controller provides the feedback indicative of the slow change mode when the applied force is greater than the first predetermined force level range and less than a second predetermined force level range, and changes the target cabin temperature at a first rate of speed;

the system controller provides the feedback indicative of the fast change mode when the applied force is greater than the second predetermined force level range and within a third predetermined force level range, and changes the target cabin temperature at a second rate of speed that is greater than the first rate of speed; and

the first predetermined force level range is less than the second predetermined force level range and the second predetermined force level range is less than the third predetermined force level range.

2. The control interface system of claim 1, wherein the pressure sensor further includes a plurality of inflatable cells in communication with the system controller for providing the haptic feedback.

3. The control interface system of claim 1, wherein a display is in communication with the system controller, the display providing indicia corresponds to the target cabin temperature change mode of the selected control icon when the system controller is in the selection mode.

4. The control interface system of claim 1, wherein the touchscreen includes at least one imbedded switch operable to generate the sensor signal upon actuation thereof.

5. The control interface system of claim 1, wherein the touchscreen is an electroactive polymer.

6. A method for controlling a function comprising:

depressing an inflatable cell on a touchscreen to generate depression force, the touchscreen is a vehicle touchscreen;

sending a sensor signal indicative of the depression force and position thereof on the touchscreen to a system controller;

evaluating the sensor signal;

determining if the depression force is within an active area of the touchscreen displaying control icons, including a control icon for setting a target cabin temperature;

determining if the sensor signal is within a first predetermined force range;

determining if the sensor signal is within a second predetermined force range greater than the first predetermined force range;

determining if the sensor signal is within a third predetermined force range greater than the second predetermined force range;

activating a search mode of a search module if the sensor signal is within the first predetermined force range, in the search mode;

(1) the control icons are displayed on the touchscreen, (2) the position of the depression force on the touch screen is determined by the system controller, (3) an image is displayed on the touch screen opposite to the depression force, the image moves along the touch screen to follow the depression force, and (4) movement of the depression force is tracked and displayed along the touchscreen;

activating a selection mode of a selection module subsequent to activation of the search mode if position of the depression force remains in the active area of the touch screen and the sensor signal is within the first predetermined force range, in the selection mode;

(1) position of the depression force relative to the control icons is determined to identify selection of the control icon for setting the target cabin temperature, (2) feedback is generated corresponding to selection of the control icon for setting the target cabin temperature, and (3) the target cabin temperature is not changed unless the sensor signal is in the second or third predetermined force ranges;

activating a slow change mode of a slow change module if the sensor signal is within the second predetermined force range, in the second predetermined force range the target cabin temperature is changed at a first rate of speed; and

activating a fast change mode of a fast change module if the sensor signal is within the third predetermined force range, in the third predetermined force range functionality controlled by the target cabin temperature is changed at a second rate of speed that is greater than the first rate of speed.

7. The method of claim 6, further comprising:

at least one imbedded switch operable to generate the sensor signal upon actuation thereof.

8. The method of claim 6, wherein the touchscreen is an electroactive polymer.

9. The method of claim 6, further comprising:

providing feedback indicative of the slow change mode when the applied force is within the second predetermined force range.

10. The method of claim 9, further comprising:

providing feedback indicative of the fast change mode when the applied force is within the third predetermined force range.

11. The method of claim 6, wherein the inflatable cell is in communication with the system controller for inflating the inflatable cell to provide a haptic feedback.

12. The method of claim 11, wherein a display and an audio system are in communication with the system controller, the display and audio providing an indicia of a selected control icon.

13. A method for controlling vehicle functions comprising:

identifying location and force of a touch on a touchscreen relative to icons displayed on the touchscreen when the force is in a first predetermined range of force, each icon is associated with a function available for control, the touchscreen is a vehicle touchscreen and the icons are configured for control of vehicle functions including cabin temperature setting;

displaying and tracking on the touchscreen the location of the touch as the touch moves along the touchscreen and is in the first predetermined range;

identifying a touched icon on the touchscreen as a control icon for setting a target cabin temperature when the force of the touch is in the first predetermined range, and not modifying the functionality associated with the selected icon unless the force of the touch exceeds the first predetermined range;

modifying the target cabin temperature at a first rate of speed when the force of the touch is in a second predetermined range greater than the first predetermined range and less than a third predetermined range; and

modifying the target cabin temperature at a second rate of speed that is greater than the first rate of speed when the force of the touch is in the third predetermined range greater than the second predetermined range.

14. The method of claim 13, further comprising generating at least one of haptic feedback and audible feedback when modifying the target cabin temperature.