DISPLAY DEVICE

• US 20160133200A1
• Filed: 04/07/2015
• Published: 05/12/2016
• Est. Priority Date: 11/10/2014
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: KIM, Tae Woo, LEE, Moongyu, CHEONG, Byoungho
• Application Number:
  US14/680,256
• Publication Number:
  US 20160133200A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2360/14 Detecting light within display terminals, e.g. using a single or a plurality of photosensors
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3688 suitable for active matrices only

Abstract

A display device includes a backlight unit generating a first light, a transparent light emitting sheet disposed on the backlight unit and including a light converting unit excited by the first light and generating a second light having a different wavelength from the first light, a display panel facing the backlight unit with the transparent light emitting sheet in-between and receiving the first and second lights, and a capturing unit provided between the transparent light emitting sheet and the backlight unit and capturing an image of a subject disposed on a front of the display panel.

Claims

1. A display device, comprising:

a backlight unit generating a first light;

a transparent light emitting sheet disposed on the backlight unit and including a light converting unit excited by the first light and generating a second light having a different wavelength from the first light;

a display panel facing the backlight unit with the transparent light emitting sheet in-between and receiving the first and second lights; and

a capturing unit provided between the transparent light emitting sheet and the backlight unit and capturing an image of a subject located at a front of the display panel.

2. The display device of claim 1, wherein the transparent light emitting sheet transmits a portion of the first light toward the display panel;

and

wherein the light converting unit is excited by another portion of the first light and converts said another portion of the first light into the second light.

3. The display device of claim 2, wherein the transparent light emitting sheet comprises a non-opening part and a plurality of opening parts.

4. The display device of claim 3, wherein an area of each of the plurality of opening parts is in a range of about 100 nm² to about 100 μ

m².

5. The display device of claim 4, wherein transmittance of the non-opening part is in a range of about 90% to 100%.

6. The display device of claim 1, wherein the first and second lights are mixed to generate a white light.

7. The display device of claim 6, wherein the first light is a blue light and the second light is a yellow light.

8. The display device of claim 1, wherein the light converting unit includes at least one of a quantum point and a fluorescent body.

9. The display device of claim 1, further comprising a controller generating a period control signal defining a capture period and a display period provided temporally alternately;

wherein the backlight unit provides the first light during the display period;

wherein the display panel operates in a display state during the display period and in a transmitting state during the capture period; and

wherein the capturing unit captures an image of the subject during the capture period.

10. The display device of claim 9, wherein the display panel is driven by a gate signal and a data voltage in the display state to display an image, and transmits the image of the subject disposed at the front of the display panel toward the capturing unit.

11. The display device of claim 1, wherein the display panel includes a display part displaying an image and a non-display part surrounding a display region, and the display part includes first and second parts;

and

wherein the capturing unit includes a first sub-capturing unit provided in correspondence to the first part and a second sub-capturing unit provided in correspondence to the second part.

12. The display device of claim 1, further comprising a tracking unit including a viewing line detecting unit detecting the viewing line of a user and a viewing line determining unit generating a viewing signal including viewing information on a part viewed by the user between the first and second parts on the basis of the detected viewing line of the user;

wherein the first and second sub-capturing units receive the viewing signal and are driven according to the viewing signal.

13. The display device of claim 12, wherein the first sub-capturing unit is driven in response to the viewing signal when the user views the first part, and the second sub-capturing unit is driven in response to the viewing signal when the user views the second part.

14. The display device of claim 1, wherein the backlight unit further comprises a diffusion plate disposed between the capturing unit and the backlight unit.

15. The display device of claim 14, further comprising an optical sheet between the capturing unit and the diffusion plate.

16. The display device of claim 14, wherein the backlight unit is disposed below the diffusion plate, generates the first light, and includes at least one light source providing the first light toward the diffusion plate.

17. The display device of claim 14, wherein the backlight unit includes at least one light source generating the first light and a light guide plate receiving the first light and guiding the first light to provide the first light to the diffusion plate.

18. The display device of claim 17, wherein the light guide plate includes an upper surface which faces the transparent light emitting sheet with the diffusion plate in-between and a side surface, and the at least one light source is disposed to face the side surface.

19. The display device of claim 1, further comprising a capture compensating unit compensating for the image of the subject captured by the capturing unit on the basis of predetermined transmission characteristic information on the transparent light emitting sheet.