TOUCH CONTROLLED DISPLAY DEVICE

• US 20110227873A1
• Filed: 11/15/2010
• Published: 09/22/2011
• Est. Priority Date: 03/17/2010
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Group)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Group)
• Inventors: Kang, Sung-Kee, Kim, Sang-Soo, Chung, Jin-Koo
• Granted Patent: US 9,141,233 B2
• Time in Patent Office: Days
• US Class Current: 345/175
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 2201/58 Arrangements comprising a monitoring photodetector
• CPC Class Codes: G06F 2203/04109 FTIR in optical digitiser, i.e. touch detection by frustrating the total internal reflection within an optical waveguide due to changes of optical properties or deformation at the touch location
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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

Abstract

A touch controlled display device is disclosed. The device comprises: a display panel including a display panel including a first surface, a second surface opposing the first surface and a plurality of pixels between the first and second surfaces, each pixel including a transmission area and a display area, the transmission area being configured to transmit light therethrough, an infrared source located on the side of the second surface of the display panel and configured to irradiate infrared light toward the first surface through the second surface, and an infrared sensor located on the side of the second surface of the display panel and configured to detect infrared light from the first surface through at least one transmission area of the plurality of pixels.

Claims

1. A touch controlled display device comprising:

a display panel comprising a first surface, a second surface opposing the first surface and a plurality of pixels between the first and second surfaces, each pixel comprising a transmission area and a display area, the transmission area being configured to transmit light therethrough;

an infrared source located on the side of the second surface of the display panel and configured to irradiate infrared light toward the first surface through the second surface; and

an infrared sensor located on the side of the second surface of the display panel and configured to detect infrared light from the first surface through at least one transmission area of the plurality of pixels.

2. The touch controlled display device of claim 1, further comprising an infrared transmission layer between the display panel and the infrared sensor, the infrared transmission layer being configured to transmit infrared light and to substantially block light of other wavelengths.

3. The touch controlled display device of claim 1, wherein the display area is least partially overlapping with the transmission area.

4. The touch controlled display device of claim 1, wherein the transmission area of each pixel is configured to transmit infrared light from the source directed to the first surface of the display panel.

5. The touch controlled display device of claim 1, further comprising a sensing plate provided over the second opposing surface, wherein the infrared sensor is provided on the sensing plate.

6. A touch controlled display device, comprising:

a display panel comprising a first surface, a second surface opposing the first surface and a plurality of pixels between the first and second surfaces, each pixel comprising a transmission area and a display area, the transmission area being configured to transmit light therethrough;

a total reflection plate over the first surface;

an infrared source configured to irradiate infrared light into the total reflection plate such that the infrared light travels along the first surface within the total reflection plate; and

an infrared sensor located on the side of the second surface of the display panel and configured to detect infrared light directed from the total reflection plate through at least one transmission area of the plurality of pixels in response to a touch on the total reflection plate.

7. The touch controlled display device of claim 6, further comprising an infrared transmission layer between the display panel and the infrared sensor, the infrared transmission layer being configured to transmit infrared light and to substantially block light of other wavelengths.

8. A touch controlled display device comprising:

a display panel comprising a first surface, a second surface opposing the first surface, and a pixel array interposed between the first and second surfaces, the first surface providing a touch control surface, the pixel array comprises a plurality of transmissive areas therein;

an infrared source for irradiating infrared light, wherein the infrared source is located on the side of the second surface of the display panel and configured to irradiate infrared light toward the first surface through at least part of the transmissive areas; and

an infrared sensor for detecting infrared light, wherein the infrared sensor is located on the side of the second surface of the display panel and configured to detect infrared light reflected by a touch of the first surface and directed toward the infrared sensor through at least part of the transmissive areas.

9. The device of claim 8, wherein the pixel array comprises a first electrode, a second electrode, and an organic emission layer between the first and second electrodes, the organic emission layer configured to emit light.

10. The device of claim 8, further comprising an infrared transmission layer between the display panel and the infrared sensor, the infrared transmission layer being configured to transmit infrared light and to substantially block light of other wavelengths.

11. The device of claim 8, wherein the pixel array comprises a pixel, which further comprises a display area neighboring the transmissive area and configured to emit light.

12. The device of claim 11, wherein the display area is least partially overlapping with the transmission area.

13. The device of claim 8, further comprising a sensing plate provided on the second surface, wherein the infrared sensor is provided on the sensing plate.