Touch drawing display apparatus and operation method thereof, image display apparatus allowing touch-input, and controller for the display apparatus

• US 10,191,648 B2
• Filed: 08/11/2015
• Issued: 01/29/2019
• Est. Priority Date: 02/10/2011
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Kanki, Noriyoshi
• Primary Examiner(s): Edouard, Patrick
• Assistant Examiner(s): Shen, Peijie
• Application Number:
  US14/823,681
• Publication Number:
  US 20150346945A1
• Time in Patent Office: 1,267 Days
• Field of Search: None
• CPC Class Codes: G06F 2203/04808 Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/0485 Scrolling or panning
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

An electronic blackboard includes a display panel and a touch-panel, draws a line corresponding to a track formed by movement of the touched position on the displayed image, and erases an erroneously drawn line corresponding to a track specifying an operation other than drawing. In another aspect, an electronic blackboard includes a touch screen, a scroll unit for scrolling an image on the display screen when positions of multi-touch move in one same direction, and a page switching unit for detecting, after detection of multi-touch input, that a finger is moved away, and executing a process of returning the image on the display screen to a state before scrolling or a process of switching the image by one page in accordance with the moving direction of multi-touch positions, depending on whether the amount of movement of touch inputs is equal to or smaller than a threshold value.

Claims

1. An image display apparatus allowing touch-input, comprising:

a touch detecting unit that has a display screen, displays page images page by page on the display screen, and detects positions and a number of touch inputs that designate positions on said display screen;

a scroll unit that scrolls, when a plurality of touch inputs are detected by said touch detecting unit and their positions on the display screen move in one same direction, an image displayed on said display screen along with movement of positions of said plurality of touch inputs; and

a first page switching unit that switches the image on said display screen by one page in accordance with the direction of movement of said plurality of touch inputs in response to an amount of movement of the touch inputs becomes larger than a first threshold value after the plurality of touch inputs are detected by said touch detecting unit;

wherein the first page switching unit detects, after the plurality of touch inputs are detected by said touch detecting unit, whether the number of touch inputs being decreased to zero, from an output of said touch detecting unit, and at a time when the number of touch inputs is decreased to zero;

if an amount of movement of the touch inputs is not larger than a second threshold value smaller than the first threshold value, executes a process of returning the image on said display screen to a state before scrolling, and if an amount of movement of the touch inputs is equal to or greater than the second threshold value and equal to or smaller than the first threshold value, executes a process of switching the image by one page in accordance with the direction of movement of the plurality of touch inputs, and

wherein after the plurality of touch inputs are detected by said touch detecting unit, when decrease in the number of touch inputs is detected from an output of said touch detecting unit, even if an amount of movement of the touch inputs is not larger than the first threshold value, scrolling is maintained as long as at least one touch input is maintained.

2. A controller for a display apparatus, used for the display apparatus that has a display screen, displays an image received from outside on the display screen and detects and outputs, to the outside, positions and a number of touch inputs that designate positions on said display screen, comprising:

a scroll unit that generates, when it is detected that a plurality of touch inputs are detected by said display apparatus and their positions on the display screen move in one same direction, an image by scrolling the image displayed on said display screen along with the movement of positions of said plurality of touch positions, and applies the generated image to said display apparatus;

a page switching unit that switches the image on said display screen by one page in accordance with the direction of movement of said plurality of touch inputs in response to an amount of movement of the touch inputs becomes larger than a first threshold value after the plurality of touch inputs are detected by said display apparatus;

the page switching unit detects, after the plurality of touch inputs are detected by said display apparatus, whether the number of touch inputs being decreased to zero, from an output of said display apparatus, and at a time when the number of touch inputs is decreased to zero;

if an amount of movement of the touch inputs is not larger than a second threshold value smaller than the first threshold value, executes a process of generating page image data for returning the image on said display screen to a state before scrolling, and if an amount of movement of the touch inputs is equal to or greater than the second threshold value and equal to or smaller than the first threshold value, executes a process of switching the image by one page in accordance with the direction of movement of the plurality of touch inputs, and transmits the generated page image data to said display apparatus,

wherein after the plurality of touch inputs are detected by said display apparatus, when decrease in the number of touch inputs is detected from an output of said display apparatus even if an amount of movement of the touch inputs is not larger than the first threshold value, scrolling is maintained as long as at least one touch input is maintained.

3. An image display apparatus allowing touch input, comprising:

a touch detecting unit that has a display screen, displays page images page by page on the display screen, and detects positions and a number of touch inputs that designate positions on said display screen;

a scroll unit that scrolls, when a plurality of touch inputs are detected by said touch detecting unit and their positions on the display screen move in one same direction, an image displayed on said display screen along with movement of positions of said plurality of touch inputs;

a first page switching unit that switches the image on said display screen by one page in accordance with the direction of movement of said plurality of touch inputs in response to an amount of movement of the touch inputs becomes larger than a first threshold value after the plurality of touch inputs are detected by said touch detecting unit;

a returning unit that detects, from an output of said touch detecting unit, whether the number of said plurality of touch inputs being decreased to zero, and at a time when the number of touch inputs is decreased to zero;

if an amount of movement of the touch inputs is not larger than a second threshold value smaller than the first threshold value, returns scrolling of the image by said scroll unit to a state before scrolling, and if an amount of movement of the touch inputs is equal to or greater than the second threshold value and equal to or smaller than the first threshold value, executes a process of switching the image by one page in accordance with the direction of movement of the plurality of touch inputs,

wherein after the plurality of touch inputs are detected by said touch detecting unit, when decrease in the number of touch inputs is detected from an output of said touch detecting unit and, even if an amount of movement of the touch inputs is not larger than the first threshold value, scrolling is maintained as long as at least one touch input is maintained.

4. A controller for a display apparatus, used for the display apparatus that has a display screen, displays an image received from outside on the display screen and detects and outputs, to the outside, positions and a number of touch inputs that designate a position on said display screen, comprising:

a scroll unit that generates, when it is detected that a plurality of touch inputs are detected by said display apparatus and their positions on the display screen move in one same direction, an image by scrolling the image displayed on said display screen along with the movement of positions of said plurality of touch positions, and applies the generated image to said display apparatus;

a first page switching unit that switches the image on said display screen by one page in accordance with the direction of movement of said plurality of touch inputs in response to an amount of movement of the touch inputs becomes larger than a first threshold value after the plurality of touch inputs are detected by said display apparatus; and

a returning unit that detects, from an output of said display apparatus, whether the number of said plurality of touch inputs being decreased to zero, and at a time when the number of touch inputs is decreased to zero;

if an amount of movement of the touch inputs is not larger than a second threshold value smaller than the first threshold value, returns scrolling of the image by said scroll unit to a state before scrolling, and if an amount of movement of the touch inputs is equal to or greater than the second threshold value and equal to or smaller than the first threshold value, executes a process of switching the image by one page in accordance with the direction of movement of the plurality of touch inputs,

wherein after the plurality of touch inputs are detected by said display apparatus, when decrease in the number of touch inputs is detected from an output of said display apparatus and, even if an amount of movement of the touch inputs is not larger than the first threshold value, scrolling is maintained as long as at least one touch input is maintained.

5. A display control method of an image display apparatus that allows touch-input, comprising:

displaying page images page by page on a display screen, and detecting positions and a number of touch inputs that designate positions on said display screen;

scrolling, when a plurality of touch inputs are detected and their positions on the display screen move in one same direction, an image displayed on said display screen along with movement of positions of said plurality of touch inputs;

after the plurality of touch inputs are detected, in response to an amount of movement of the touch inputs becomes larger than a first threshold value, switching the image on said display screen by one page in accordance with the direction of movement of said plurality of touch inputs; and

detecting, after the plurality of touch inputs are detected, whether the number of touch inputs being decreased to zero, and at a time when the number of touch inputs is decreased to zero;

if an amount of movement of the touch inputs is not larger than a second threshold value smaller than the first threshold value, executes a process of returning the image on said display screen to a state before scrolling, and if an amount of movement of the touch inputs is equal to or greater than the second threshold value and equal to or smaller than the first threshold value, executes a process of switching the image by one page in accordance with the direction of movement of the plurality of touch inputs,

wherein when a decrease in the number of touch inputs is detected after the plurality of touch inputs are detected, even if an amount of movement of the touch inputs is not larger than the first threshold value, scrolling is maintained as long as at least one touch input is maintained.

6. A display control method of an image display apparatus that allows touch-input, comprising:

displaying page images page by page on a display screen, and detecting positions and a number of touch inputs that designate positions on said display screen;

scrolling, when a plurality of touch inputs are detected and their positions on the display screen move in one same direction, an image displayed on said display screen along with movement of positions of said plurality of touch inputs;

after the plurality of touch inputs are detected, in response to an amount of movement of the touch inputs becomes larger than a first threshold value, switching the image on said display screen by one page in accordance with the direction of movement of said plurality of touch inputs;

detecting, from the detected plurality of touch inputs, whether the number of said plurality of touch inputs being decreased to zero, and at a time when the number of touch inputs is decreased to zero;

if an amount of movement of the touch inputs not larger than a second threshold value smaller than the first threshold value, returning scrolling of the image to a state before scrolling, and if an amount of movement of the touch inputs is equal to or greater than the second threshold value and equal to or smaller than the first threshold value, executes a process of switching the image by one page in accordance with the direction of movement of the plurality of touch inputs,

wherein when a decrease in the number of touch inputs is detected after the plurality of touch inputs are detected, even if an amount of movement of the touch inputs is not larger than the first threshold value, scrolling is maintained as long as at least one touch input is maintained.