Display input device and vehicle-mounted information equipment

• US 8,890,819 B2
• Filed: 03/16/2010
• Issued: 11/18/2014
• Est. Priority Date: 03/31/2009
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Shimotani, Mitsuo, Matsubara, Tsutomu, Sadahiro, Takashi, Ohta, Masako, Okano, Yuichi, Sempuku, Tsuyoshi
• Primary Examiner(s): Yodichkas, Aneeta
• Application Number:
  US13/146,353
• Publication Number:
  US 20110285657A1
• Time in Patent Office: 1,708 Days
• Field of Search: 345/173
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04101 2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup
• CPC Class Codes: G06F 2203/04108 Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction
• CPC Class Codes: G06F 2203/04805 Virtual magnifying lens, i.e. window or frame movable on top of displayed information to enlarge it for better reading or selection
• CPC Class Codes: G06F 3/013 Eye tracking input arrangements G06F3/015 takes precedence
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures
• CPC Class Codes: G06F 3/04886 by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus

Abstract

A display input device includes a control unit for correcting horizontal coordinates of an object to be detected on an xy coordinate plane extending on a touch panel 1, which are acquired by a proximity sensor 12, according to an angle of elevation φ, an angle of deviation θ and a vertical distance z between the object to be detected and a surface of the touch panel, φ being the angle of a straight line OC with respect to the surface of the touch panel, the straight line OC extending between a predetermined point O positioned on the touch panel and a predetermined point C positioned outside the touch panel, and θ being the angle between a straight line which is an orthogonal projection of the line OC onto the xy coordinate plane, and an x axis on the xy coordinate plane.

Claims

1. A display input device comprising:

a touch panel having a proximity sensor for detecting coordinates of an object to be detected approaching to said touch panel in a non-contact manner, for carrying out a display of an image and an input of an image; and

a control unit for correcting x and y coordinates of said object to be detected which are acquired by said proximity sensor, according to predetermined functions each having, as variables, an angle of elevation φ

, an angle of deviation θ and

a z coordinate, a surface of said touch panel being defined as an xy coordinate plane and a direction perpendicular to said surface of said touch panel being defined as a z axis, said angle of elevation φ

being the one of a straight line OC with respect to said surface of said touch panel, the straight line OC extending between a predetermined point O positioned on said touch panel and a predetermined point C positioned outside said touch panel, and said angle of deviation θ

being the one between a straight line which is an orthogonal projection of said line OC onto said xy coordinate plane, and an x axis on said xy coordinate plane.

2. The display input device according to claim 1, wherein said control unit changes a display style of an object in a display area having a fixed range which is displayed on said touch panel, and displays the object in a vicinity of a position shown by the corrected x and y coordinates of said object to be detected.

3. The display input device according to claim 1, wherein said control unit enlarges or reduces an image in a display area having a fixed range which is displayed on said touch panel, and displays the image in a vicinity of a position shown by the corrected x and y coordinates of said object to be detected.

4. The display input device according to claim 1, wherein said control unit calculates the corrected x and y coordinates (x2, y2) of the object to be detected according to following operational expressions:

x2=x1−

f(z)·

cot φ

·

cos θ and

y2=y1−

g(z)·

cot φ

·

sin θ

, where the x and y coordinates of the object to be detected which are an orthogonal projection of the object to be detected onto said xy coordinate plane are expressed as (x1, y1) and said corrected x and y coordinates of the object to be detected are expressed as (x2, y2), and the functions f(z) and g(z) are i) constant that is equal to or smaller than a predetermined value Zref in a case in which the object to be detected is detectable at a detection distance that is set to the Zref in the z-direction, or ii) set to f(z)≦

z and g(z)≦

z, respectively, in a case in which the object to be detected is detectable at a variable distance z in the z-direction.

5. The display input device according to claim 1, wherein said control unit changes said correction amount according to said z coordinate.

6. The display input device according to claim 1, wherein said control unit measures a user'"'"'s view-point position with respect to said touch panel to correct a position of the predetermined point C.

7. The display input device according to claim 1, wherein said control unit detects from which one of leftward and rightward directions the object to be detected has approached to said touch panel with respect to a central axis of said touch panel, and can change a direction or a strength of said correction according to said direction detected thereby.

8. The display input device according to claim 1, wherein said control unit detects a tilt of said touch panel with respect to a central axis of said touch panel and can change an estimated direction or an estimated strength of an eye of said correction according to said tilt detected thereby.

9. The display input device according to claim 1, wherein said control unit can change an estimated direction or an estimated strength of an eye of said correction according to a user setting inputted via said touch panel.

10. A display input device comprising:

a touch panel having a proximity sensor for detecting coordinates of an object to be detected approaching to said touch panel in a non-contact manner, for carrying out a display of an image and an input of an image; and

a control unit for correcting x and y coordinates of said object to be detected which are acquired by said proximity sensor, according in predetermined functions each having, as variables, an angle of elevation φ

, an angle of deviation θ and

a z coordinate, a surface of said touch panel being defined as an xy coordinate plane and a direction perpendicular to said surface of said touch panel being defined as a z axis, said angle of elevation φ

being the one of a straight line L connecting between a point A which is a position of said object to be detected and a predetermined point C positioned outside said touch panel with respect to a point of intersection B of said straight line and said surface of said touch panel, and said angle of deviation θ

being the one between a straight line M connecting between a projected point which is an orthogonal projection of the object to be detected onto said xy coordinate plane and said point of intersection B, and an x axis on said xy coordinate plane.

11. The display input device according to claim 10, wherein said control unit changes a display style of an object in a display area having a fixed range which is displayed on said touch panel, and displays the object in a vicinity of a point shown by the corrected x and y coordinates of said object to be detected.

12. The display input device according to claim 10, wherein said control unit enlarges or reduces an image in a display area having a fixed range which is displayed on said touch panel, and displays the image in a vicinity of a position shown by the corrected x and y coordinates of said object to be detected.

13. The display input device according to claim 10, wherein said control unit calculates the corrected x and y coordinates (x2, y2) of the object to be detected according to following operational expressions:

x2=x1−

f(z)·

cot φ

·

cos θ and

y2=y1−

g(z)·

cot φ

·

sin θ

, where the x and y coordinates of the object to be detected which are an orthogonal projection of the object to be detected onto said xy coordinate plane are expressed as (x1, y1) and said corrected x and y coordinates of the object to be detected are expressed as (x2, y2) and the functions f(z) and g(z) are i) constant that is equal to or smaller than a predetermined value Zref in a case in which the object to be detected is detectable at a detection distance that is set to the Zref in the z-direction, or ii) set to f(z)≦

z and g(z)≦

z, respectively, in a case in which the object to be detected is detectable at a variable distance z in the z-direction.

14. The display input device according to claim 10, wherein said control unit changes said correction amount according to said z coordinate.

15. The display input device according to claim 10, wherein said control unit measures a users view-point position with respect to said touch panel to correct a position the predetermined point C.

16. The display input device according to claim 10, wherein said control unit detects from which one of leftward and rightward directions the object to be detected has approached to said touch panel with respect to a central axis of said touch panel, and can change a direction or a strength of said correction according to said direction detected thereby.

17. The display input device according to claim 10, wherein said control unit detects a tilt of said touch panel with respect to a central axis of said touch panel and can change an estimated direction or an estimated strength of an eye of said correction according to said tilt detected thereby.

18. The display input device according to claim 10, wherein said control unit can change an estimated direction or an estimated strength of an eye of said correction according to a user setting inputted via said touch panel.

19. Vehicle-mounted information equipment which can be connected to a touch panel having a proximity sensor for detecting coordinates of an object to be detected approaching to said touch panel in a non-contact manner, for carrying out a display of an image and an input of an image, said vehicle-mounted information equipment comprising:

a control unit for receiving the coordinates of said object to be detected inputted thereto from said proximity sensor to correct x and y coordinates of said object to be detected, which are acquired by said proximity sensor, according to predetermined functions each having, as variables, an angle of elevation φ

, an angel of device θ and

a z coordinate, a surface of said touch panel being defined as an xy coordinate plane and a direction perpendicular to said surface of said touch panel being defined as a z axis, said angle of elevation φ

being the one of a straight line OC with respect to said surface of said touch panel, the straight line OC extending between a predetermined point O positioned on said touch panel and a predetermined point C positioned outside said touch panel, and said angle of deviation θ

being the one between a straight line which is on orthogonal projection of said line OC onto said xy coordinate plane, and an x axis on said xy coordinate plane.

21. The vehicle-mounted information equipment according to claim 19 or 20, wherein said touch panel has a touch sensor for detecting coordinates of a touch of the object to be detected onto said touch panel, and said control unit performs a navigation process on a basis of the coordinates inputted thereto from said touch sensor.

20. Vehicle-mounted information equipment which can be connected to a touch panel having a proximity sensor for detecting coordinates of an object to be detected approaching to said touch panel in a non-contact manner, for carrying out a display of an image and an input of an image, said vehicle-mounted information equipment comprising:

a control unit for receding the coordinates of said object to be detected inputted thereto from said proximity sensor to correct x and y coordinates of said object to be detected, which are acquired by said proximity sensor, according to predetermined functions each having, as variables, an angle of elevation φ

, an angle of deviation θ and

a z coordinate, a surface of said touch panel being defined as an xy coordinate plane and a direction perpendicular to said surface of said touch panel being defined as a z axis, said angle of elevation φ

being the one of a straight line L connecting between a point A which is a position of said object to be detected and a predetermined point C positioned outside said touch panel with respect to a point of intersection B of said straight line and said surface of said touch panel, and said angle of deviation θ

being the one between a straight line M connecting between a projected point which is an orthogonal projection of the object to be detected onto said xy coordinate plane and said point of intersection B, and an x axis on said xy coordinate plane.