Display system, input device, display device, and display method

• US 10,606,381 B2
• Filed: 10/10/2014
• Issued: 03/31/2020
• Est. Priority Date: 10/10/2014
• Status: Active Grant

• Current Assignee: Sharp NEC Display Solutions, Ltd.
• Original Assignee: NEC Display Solutions, Ltd. (NEC Corporation)
• Inventors: Kato, Hiroshi
• Primary Examiner(s): Mandeville, Jason M
• Application Number:
  US15/517,138
• Publication Number:
  US 20170308184A1
• Time in Patent Office: 1,999 Days
• Field of Search: 345173, 345179
• CPC Class Codes: G06F 2203/04104 Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
• 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 3/033 Pointing devices displaced or positioned by the user , e.g. mice, trackballs, pens or joysticks; Accessories therefor digitisers characterised by the transducing means G06F3/041
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/0383 Signal control means within the pointing device
• CPC Class Codes: G06F 3/0386 for light pen
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0425 using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected tracking a projected light spot to determine a position on a display surface G06F3/0386
• CPC Class Codes: G06F 3/04847 Interaction techniques to control parameter settings, e.g. interaction with sliders or dials
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

A display system includes a display device and an input device. The display device includes a display for displaying images, an image signal processor for displaying images on the display, and a receiver for receiving signals from the input device. The input device includes a detector that detects a target color at a partial area of the display so as to acquire target color information, a storage unit for storing registered color information, a color determination processor that carries out a color determination process for determining whether or not the target color information matches the registered color information so as to generate a color determination signal, and a transmitter for transmitting the color determination signal. The image signal processor carries out a color change process of sequentially changing target colors but suspends the color change process when the receiver receives the color determination signal.

Claims

1. A display system comprising a display device and an input device configured to communicate with the display device, wherein the display device includes a display configured to draw an image using the input device having a casing, and an image signal processor configured to display the image on the display,

wherein the casing of the input device includes a detector configured to acquire target color information representing a target color at a touched area touched by the input device on the display,

a storage unit configured to store registered color information representing a predetermined color, and

a color determination processor configured to carry out a color determination process to generate a color determination signal when the target color information matches the registered color information,

wherein the image signal processor carries out a color change process to change the target color in a predetermined order of colors as long as the input device touches the touched area on the display, and wherein the image signal processor suspends the color change process upon receiving the color determination signal from the input device.

2. The display system according to claim 1, further comprising a position detection device coupled with the display device, which is configured to detect positional information representing an input position of the input device touched on the display.

3. The display system according to claim 2, further comprising an information processing device coupled with the display device, which is configured to generate an image signal based on the positional information from the position detection device, thus sending the image signal to the display device.

4. The display system according to claim 1, wherein the image signal processor carries out the color change process after displaying the target color, and

wherein the storage unit of the input device stores trigger color information representing a trigger color such that the color determination processor starts the color determination process when the target color information matches the trigger color information.

5. The display system according to claim 1, wherein the image displayed on the display comprises a time series of images correlated to frames, and wherein the touched area includes an area having pixels displayed in a different manner among pixels of the image between two images corresponding to two frames.

6. The display system according to claim 1, wherein the input device carries out a registration process to store the registered color information on the storage unit.

7. The display system according to claim 6, wherein the input device is further configured to notify completion of the registration process of the registered color information on the storage unit.

8. The display system according to claim 1, wherein the image signal processor stores color-changed image information, representing an image displayed on the display when suspending the color change process, on non-volatile memory or outputs the color-changed image information to another device.

9. A display device connectible to an input device, comprising:

a display configured to draw an image using the input device having a casing; and

an image signal processor configured to display the image on the display;

wherein the image signal processor carries out a color change process to change a target color at a touched area touched by the input device on the display, and wherein the image signal processor suspends the color change process upon receiving a color determination signal, which is generated by the input device when the target color at the touched area matches a registered color which is determined in advance.

12. The display device according to claim 9, wherein the display has a touch panel responsive to a touch made by the input device.

13. The display device according to claim 9, wherein the image signal processor carries out the color change process at the touched area on the display, which includes a touched point touched by the input device and its peripheral area, or the position of the image drawn by the input device before defining its color.

10. An input device connectible to a display device configured to draw an image using the input device having a casing, comprising:

a detector configured to acquire target color information representing a target color at a touched area touched by the input device on a display of the display device;

a storage unit configured to store registered color information representing a predetermined color; and

a color determination processor configured to carry out a color determination process to generate a color determination signal when the target color information matches the registered color information, thus sending the color determination signal to the display device,

wherein the detector, the storage unit and the color determination processor are included in the casing.

14. The input device according to claim 10, wherein the detector is a color sensor configured to detect the target color upon detecting a light beam emitted from the touched area of the display.

11. A display method adapted to a display system including an input device and a display device configured to draw an image using the input device having a casing, the display method comprising:

a first step for the display device to carry out a color change process to change a target color at a touched area touched by the input device on a display of the display;

a second step for the input device to acquire target color information representing the target color;

a third step for the input device to carry out a color determination process to generate a color determination signal when the target color information matches registered color information representing a predetermined color;

a fourth step for the input device to transmit the color determination signal to the display device;

a fifth step for the display device to suspend the color change process when receiving the color determination signal from the input device; and

a sixth step for the display device to display on the display an image having the target color when suspending the color change process in the fifth step.