Display device and electronic apparatus

• US 10,128,320 B2
• Filed: 12/06/2017
• Issued: 11/13/2018
• Est. Priority Date: 03/22/2011
• Status: Active Grant

• Current Assignee: JDI Design and Development GK
• Original Assignee: JOLED Inc.
• Inventors: Teraguchi, Shinichi, Kodate, Manabu, Noh, Seonghee
• Primary Examiner(s): Karimi, Pegeman
• Application Number:
  US15/833,165
• Publication Number:
  US 20180108711A1
• Time in Patent Office: 342 Days
• CPC Class Codes: G06F 2203/04108 Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: H04N 13/305 using lenticular lenses, e.g. arrangements of cylindrical lenses
• CPC Class Codes: H04N 13/315 the parallax barriers being time-variant
• CPC Class Codes: H04N 13/356 having separate monoscopic and stereoscopic modes
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

A display device includes a pixel portion including a plurality of pixels; a display switching function portion that displays an image based on light emitted from the pixel portion, and is capable of switching a three-dimensional display and a two-dimensional display of the image; and a sensor portion that detects whether or not an object comes into contact with or approaches.

Claims

1. A display device comprising:

a pixel portion including a plurality of pixels;

a display switching function portion configured to display an image based on light emitted from the pixel portion, the display switching function portion is capable of switching between a three-dimensional display of the image and a two-dimensional display of the image; and

a sensor portion configured to detect whether or not an object comes into contact with the sensor portion or approaches the sensor portion,

wherein;

the pixel portion includes an organic electroluminescent layer and a common electrode in this order above a plurality of pixel electrodes,

the display switching function portion includes a function layer and a driving electrode in this order above a counter electrode, the function layer allows an emission angle or an emission area of a light beam to vary in response to an applied voltage, and

the sensor portion includes a detection electrode above the driving electrode, a capacitative element being between the driving electrode and the detection electrode,

a driving circuit is configured to output a sensor driving signal to the driving electrode during the three-dimensional display and during the two-dimensional display, the driving circuit is configured to output a 3D display driving signal to the driving electrode during the three-dimensional display at a pulse width that is longer than a pulse width of the sensor driving signal and to output a 2D display driving signal to the driving electrode during the two-dimensional display at a pulse width that is longer than the pulse width of the sensor driving signal.

2. The display device according to claim 1,

wherein the display switching function portion is configured by any one of a liquid crystal lens, a liquid lens, and a barrier parallax.

3. The display device according to claim 2,

wherein the sensor portion is an electrostatic capacitance type touch sensor.

4. The display device according to claim 1,

wherein the display switching function portion and the sensor portion are provided in this order from the pixel portion side.

5. The display device according to claim 1,

wherein the pixel portion is sealed between a first substrate and a second substrate,

the counter electrode is provided above the second substrate with a third substrate interposed therebetween, and

a fourth substrate is provided between the driving electrode for a sensor and the detection electrode.

6. The display device according to claim 1,

wherein the pixel portion is sealed between a first substrate and a second substrate,

the counter electrode is provided directly on the second substrate, and

a fourth substrate is provided between the driving electrode for a sensor and the detection electrode.

7. The display device according to claim 1,

the pixel portion and a protective layer are formed in this order above a first substrate,

the counter electrode is provided on the protective layer, and

a fourth substrate is provided between the driving electrode.

8. The display device according to claim 1,

wherein the common electrode in the pixel portion also serves as the counter electrode in the display switching function portion.

9. The display device according to claim 1,

wherein the common electrode in the pixel portion also serves as the counter electrode in the display switching function portion.

10. The display device according to claim 9,

the pixel portion is provided on a first substrate,

the function layer is provided on the common electrode of the pixel portion, and

a fourth substrate is provided between the driving electrode.

11. The display device according to claim 1,

wherein the driving electrode includes one or a plurality of strip-shaped driving electrodes,

the detection electrode includes one or a plurality of strip-shaped detection electrodes that extend in a direction intersecting the strip-shaped driving electrodes.

12. The display device according to claim 1,

wherein the display switching function portion is a liquid crystal lens, and

a liquid crystal layer in which a refraction index varies in response to an applied voltage is provided as the function layer.

13. The display device according to claim 1,

wherein the display switching function portion is a liquid lens, and

a polar liquid layer and a nonpolar liquid layer in which a shape of an interface therebetween varies in response to an applied voltage are provided as the function layer.

14. The display device according to claim 1,

wherein the display switching function portion is a liquid crystal barrier, and

a liquid crystal layer, which is capable of switching transmission and interception of a selective area in response to an applied voltage, is provided as the function layer.

15. The display device according to claim 1,

a detection circuit configured to perform an object detection process based on a detection signal obtained from the detection electrode, the sensor driving signal being transferred onto the detection electrode to become the detection signal.

16. The display device according to claim 1,

the plurality of pixels is to be driven by the 2D display driving signal during the two-dimensional display and by the 3D display driving signal during the three-dimensional display.

17. An electronic apparatus comprising:

the display device according to claim 1.