Display device with stepwise display scale control, stepwise control method of the display scale on a display device, and computer program for stepwise control of the display scale of a display device

• US 8,942,833 B2
• Filed: 11/09/2011
• Issued: 01/27/2015
• Est. Priority Date: 11/23/2010
• Status: Expired due to Fees

• Current Assignee: Aisin AW Company Limited (Aisin Corp.)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.)
• Inventors: Nagasaka, Hidenori
• Primary Examiner(s): JARRETT, RYAN A
• Application Number:
  US13/292,631
• Publication Number:
  US 20120130510A1
• Time in Patent Office: 1,175 Days
• Field of Search: None
• US Class Current: 700/83
• CPC Class Codes: G01C 21/3664 Details of the user input interface, e.g. buttons, knobs or sliders, including those provided on a touch screen; remote controllers; input using gestures

Abstract

Control devices, methods, and programs set a final control value by smoothly shifting from the control value to a final control value. The devices, methods, and programs specify an operation amount of a user operation with respect to a prescribed control value, and access a pre-change control value that is a value of the control value before a completed change. Based on the accessed pre-change control value and the specified operation amount of the user operation, devices, methods, and programs set a final control value by changing the control value in a stepwise manner from the pre-change control value to the final control value within a prescribed control value range.

Claims

1. A control device, comprising:

a memory that stores;

a pre-change scale; and

a computer-executable scale change program;

a display device that displays a map; and

a processor that, when executing the stored scale change program;

specifies an operation amount of a user operation that changes a scale of the displayed map;

accesses the stored pre-change scale that is a scale of the displayed map before the user operation; and

based on the accessed pre-change scale and the specified operation amount of the user operation, sets a final scale that is a value of the scale after the user operation by

changing the scale of the displayed map in a stepwise manner from the pre-change scale to the final scale within a prescribed scale range, a number of steps of the stepwise change being based on a difference between the pre-change scale and the final scale, the final scale being set by;

specifying a tentative final scale that is shifted from the pre-change scale by a shift amount that is based on the specified operation amount of the user;

comparing the tentative final scale and a scale limit, the scale limit comprising at least one of an upper limit and a lower limit;

setting the final scale equal to the scale limit when the tentative final scale exceeds the scale limit; and

setting the final scale equal to the tentative final scale when the tentative final scale does not exceed the scale limit;

identifying a plurality of settable scales between the upper limit and the lower limit;

calculating a number of the settable scales included between the pre-change scale and the final scale, the number of steps being set in proportion to the calculated number of the settable scales;

while changing the scale, calculating a number of the settable scales included between a current scale and the final scale; and

repeatedly changing the scale by a shift amount corresponding to a number that multiplies the number of settable scales included between a current scale and the final scale by a prescribed percent to change the scale in a stepwise manner until the final scale is reached.

2. The control device according to claim 1, further comprising:

a touch panel that is disposed in a display area of the display device and receives a touch operation from the user, the display area including a scale changing area for changing the scale;

wherein the controller;

detects touch coordinates touched by the user in the touch panel; and

specifies the operation amount of the user operation with respect to the scale changing area.

3. The control device according to claim 2, wherein the controller:

when a touch-off event occurs after the touch coordinates move in a direction that changes the scale, specifies the operation amount of the user operation with respect to the scale changing area based on a shift speed of the touch coordinates immediately before the touch-off event.

4. A navigation device comprising the control device according to claim 1.

5. A control method of a control device, comprising:

displaying a map on a display device;

specifying, with a processor, an operation amount of a user operation that changes a scale of the displayed map;

accessing, with the processor, a pre-change scale that is a scale of the displayed map before the user operation; and

based on the accessed pre-change scale and the specified operation amount of the user operation, setting, with the processor, a final scale that is a value of the scale after the user operation, the by

changing, with the processor, the scale in a stepwise manner from the pre-change scale to the final scale within a prescribed scale range, a number of steps of the stepwise change being based on a difference between the pre-change scale and the final scale, the final scale being set by;

specifying, with the processor, a tentative final scale that is shifted from the pre-change scale by a shift amount that is based on the specified operation amount of the user;

comparing, with the processor, the tentative final scale and a scale limit, the scale limit comprising at least one of an upper limit and a lower limit;

setting, with the processor, the final scale equal to the scale limit when the tentative final scale exceeds the scale limit;

setting, with the processor, the final scale equal to the tentative final scale when the tentative final scale does not exceed the scale limit;

identifying, with the processor, a plurality of settable scales between the upper limit and the lower limit;

calculating, with the processor, a number of the settable scales included between the pre-change scale and the final scale, the number of steps being set in proportion to the calculated number of the settable scales;

while changing the scale, calculating, with the processor, a number of the settable scales included between a current scale and the final scale; and

repeatedly changing, with the processor, the scale by a shift amount corresponding to a number that multiplies the number of settable scales included between a current scale and the final scale by a prescribed percent to change the scale in a stepwise manner until the final scale is reached.

6. The control method according to claim 5, further comprising:

providing a touch panel that is disposed in a display area of the display device and receives a touch operation from the user, the display area including a scale changing area for changing the scale;

detecting, with the processor, touch coordinates touched by the user in the touch panel; and

specifying, with the processor, the operation amount of the user operation with respect to the scale changing area.

7. The control method according to claim 6, further comprising:

when a touch-off event occurs after the touch coordinates move in a direction that changes the scale, specifying, with the processor, the operation amount of the user operation with respect to the scale changing area based on a shift speed of the touch coordinates immediately before the touch-off event.

8. A non-transitory computer-readable storage medium storing a computer-executable control program, the program comprising:

instructions for displaying a map on a display device;

instructions for specifying an operation amount of a user operation that changes a scale of the displayed map;

instructions for accessing a pre-change scale that is a scale of the displayed map before the user operation; and

instructions for, based on the accessed pre-change scale and the specified operation amount of the user operation, setting a final scale that is a value of the scale after the user operation by

changing the scale in a stepwise manner from the pre-change scale to the final scale within a prescribed scale range, a number of steps of the stepwise change being based on a difference between the pre-change scale and the final scale, the final scale being set by;

specifying a tentative final scale that is shifted from the pre-change scale by a shift amount that is based on the specified operation amount of the user;

comparing the tentative final scale and a scale limit, the scale limit comprising at least one of an upper limit and a lower limit;

setting the final scale equal to the scale limit when the tentative final scale exceeds the scale limit;

setting the final scale equal to the tentative final scale when the tentative final control scale does not exceed the scale limit;

identifying a plurality of settable scales between the upper limit and the lower limit;

calculating a number of the settable scales included between the pre-change scale and the final scale the number of steps being set in proportion to the calculated number of the settable scales;

while changing the scale, calculating a number of the settable scales included between a current scale and the final scale; and

repeatedly changing the scale by a shift amount corresponding to a number that multiplies the number of settable scales included between a current scale and the final scale by a prescribed percent to change the scale in a stepwise manner until the final scale is reached.