TOUCH DRAWING DISPLAY APPARATUS AND OPERATION METHOD THEREOF, IMAGE DISPLAY APPARATUS ALLOWING TOUCH-INPUT, AND CONTROLLER FOR THE DISPLAY APPARATUS

• US 20150346945A1
• Filed: 08/11/2015
• Published: 12/03/2015
• 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
• Granted Patent: US 10,191,648 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 the 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 detects, after the plurality of touch inputs are detected by said touch detecting unit, decrease in the number of touch inputs from an output of said touch detecting unit and, depending on whether an amount of movement of the touch inputs is not larger than a first threshold value, selectively executes a process of returning the image on said display screen to a state before scrolling and a process of switching the image on said display screen by one page in accordance with the direction of movement of said plurality of touch inputs.

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 the 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; and

a page switching unit that detects, after the plurality of touch inputs are detected by said display apparatus, decrease in the number of touch inputs from an output of said display apparatus, depending on whether an amount of movement of the touch inputs is not larger than a first threshold value, selectively executes a process of generating page image data for returning the image on said display screen to a state before scrolling and a process of generating page image data for switching the image on said display screen by one page in accordance with the direction of movement of said plurality of touch inputs, and transmits the generated page image data to said display apparatus.

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 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 page switching unit that switches, in response to an amount of movement of said plurality of touch inputs exceeding a threshold value during scrolling of the image by said scroll unit, the image on said display screen by one page in accordance with the direction of movement of said plurality of touch inputs; and

a returning unit that detects, from an output of said touch detecting unit, decrease of the number of said plurality of touch inputs before page switching by said page switching unit during scrolling of the image by said scroll unit, and returns scrolling of the image by said scroll unit to a state before scrolling.

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 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 page switching unit that switches, in response to an amount of movement of said plurality of touch inputs exceeding a threshold value during scrolling of the image by said scroll unit, the image on said display screen by one page in accordance with the direction of movement of said plurality of touch inputs; and

a returning unit that detects, from an output of said display apparatus, decrease of the number of said plurality of touch inputs before page switching by said page switching unit during scrolling of the image by said scroll unit, and returns scrolling of the image by said scroll unit to a state before scrolling.