Display device and driving method of the same

• US 8,994,763 B2
• Filed: 03/15/2012
• Issued: 03/31/2015
• Est. Priority Date: 03/25/2011
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Miyake, Hiroyuki
• Primary Examiner(s): Haley, Joseph
• Assistant Examiner(s): ILUYOMADE, IFEDAYO B
• Application Number:
  US13/421,165
• Publication Number:
  US 20120242723A1
• Time in Patent Office: 1,111 Days
• Field of Search: None
• US Class Current: 345/694
• CPC Class Codes: G02F 1/13 based on liquid crystals, e.g. single liquid crystal display cells
• CPC Class Codes: G09G 2300/023 Display panel composed of stacked panels
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2300/0804 Sub-multiplexed active matrix panel, i.e. wherein one active driving circuit is used at pixel level for multiple image producing elements
• CPC Class Codes: G09G 2300/0861 with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 5/10 Intensity circuits
• CPC Class Codes: H04N 13/315 the parallax barriers being time-variant
• CPC Class Codes: H04N 13/378 for tracking rotational head movements around an axis perpendicular to the screen
• CPC Class Codes: H04N 2213/001 Constructional or mechanical details

Abstract

In a display device in which a shape of a parallax barrier is changed depending on the relative positional relation to the viewer, the occurrence of crosstalk is suppressed. Images are displayed in a part of a plurality of sub-pixels included in each pixel, and images are not displayed in the other sub-pixels. That is, a display area in the pixel is reduced. Thus, the occurrence of crosstalk can be suppressed. Further, sub-pixels have a square shape or a substantially square shape. Thus, even when sub-pixels which display images are selected depending on the relative positional relation to the viewer, the shape of the display area in the pixel does not change greatly. Therefore, even in the case where the positional relationship is changed (in the case where the arranged parallax barrier is changed), the occurrence of crosstalk can be suppressed without respect to the positional relationship.

Claims

1. A driving method of a display device, the display device comprising a display panel comprising a plurality of pixels arranged in matrix, each one of the plurality of pixels comprising A×

B sub-pixels arranged in A rows and B columns wherein A and B are natural numbers of 3 or more, the driving method comprising;

emitting light in A sub-pixels arranged in one specific column and not emitting light in A×

(B−

1) sub-pixels arranged in (B−

1) columns other than the one specific column in a first display state; and

emitting light in B sub-pixels arranged in one specific row and not emitting light in (A−

1)×

B sub-pixels arranged in (A−

1) rows other than the one specific row in a second display state,

wherein the display device further comprises a shutter panel comprising a plurality of optical shutters arranged in a matrix, the driving method further comprising the steps of;

arranging a first parallax barrier by bringing a first part of the plurality of optical shutters into a light-shielding state and bringing a second part of the plurality of optical shutters into a light-transmitting state in the first display state; and

arranging a second parallax barrier by bringing a third part of the plurality of optical shutters into a light-shielding state and bringing a fourth part of the plurality of optical shutters into a light-transmitting state in the second display state.

2. The driving method of a display device according to claim 1, wherein:

the A sub-pixels each emit a different color of light from each other;

the B sub-pixels each emit a different color of light from each other;

a white light can be obtained when lights emitted from the A sub-pixels are mixed; and

a white light can be obtained when lights emitted from the B sub-pixels are mixed.

3. The driving method of a display device according to claim 1, wherein:

a first stripe-shaped parallax barrier is arranged in the first display state;

the first stripe-shaped parallax barrier has a long axis in a direction in which the A sub-pixels arranged in the one specific column are aligned;

a second stripe-shaped parallax barrier is arranged in the second display state; and

the second stripe-shaped parallax barrier has a long axis in a direction in which the B sub-pixels arranged in the one specific row are aligned.

4. The driving method of a display device according to claim 1, wherein:

the first parallax barrier is arranged in a first checkered pattern in the first display state; and

the second parallax barrier is arranged in a second checkered pattern in the second display state.

5. The driving method of a display device according to claim 4, wherein the first checkered pattern is a same pattern as the second checkered pattern.

6. A driving method of a display device, the display device comprising a pixel comprising a first sub-pixel, a second sub-pixel arranged in a first direction with respect to the first sub-pixel, and a third sub-pixel arranged in a second direction with respect to the first sub-pixel, the second direction being a different direction from the first direction, the driving method comprising the steps of:

emitting light in the first sub-pixel and the second sub-pixel, and not emitting light in the third sub-pixel in a first display state; and

emitting light in the first sub-pixel and the third sub-pixel, and not emitting light in the second sub-pixel in a second display state,

wherein the display device further comprises a shutter panel comprising a plurality of optical shutters arranged in a matrix, the driving method further comprising the steps of;

arranging a first parallax barrier by bringing a first part of the plurality of optical shutters into a light-shielding state and bringing a second part of the plurality of optical shutters into a light-transmitting state in the first display state; and

arranging a second parallax barrier by bringing a third part of the plurality of optical shutters into a light-shielding state and bringing a fourth part of the plurality of optical shutters into a light-transmitting state in the second display state.

7. The driving method of a display device according to claim 6, wherein:

the second sub-pixel emits a different color of light from the first sub-pixel; and

the third sub-pixel emits a different color of light from the first sub-pixel.

8. The driving method of a display device according to claim 6, wherein:

a first stripe-shaped parallax barrier having a long axis in the first direction, is arranged in the first display state; and

a second stripe-shaped parallax barrier including a long axis in the second direction, is arranged in the second display state.

9. The driving method of a display device according to claim 6, wherein:

the first parallax barrier is arranged in a first checkered pattern in the first display state; and

the second parallax barrier is arranged in a second checkered pattern in the second display state.

10. The driving method of a display device according to claim 9, wherein the first checkered pattern is a same pattern as the second checkered pattern.

11. A display device comprising:

a display panel comprising a plurality of pixels arranged in a matrix, each one of the plurality of pixels comprising A×

B sub-pixels arranged in A rows and B columns wherein A and B are natural numbers of 3 or more; and

a shutter panel comprising a plurality of optical shutters arranged in a matrix,

wherein;

A sub-pixels arranged in one specific column are configured to emit light in a first display state;

A×

(B−

1) sub-pixels arranged in (B−

1) columns other than the one specific column are configured not to emit light in the first display state;

B sub-pixels arranged in one specific row are configured to emit light in a second display state;

(A−

1)×

B sub-pixels arranged in (A−

1) rows other than the one specific row are configured not to emit light in the second display state;

each one of the A sub-pixels is configured to emit a different color of light with each other;

each one of the B sub-pixels is configured to emit a different color of light with each other;

a white light can be obtained when lights emitted from the A sub-pixels are mixed;

a white light can be obtained when lights emitted from the B sub-pixels are mixed;

the shutter panel is configured to arrange a first parallax barrier by bringing a first part of the plurality of optical shutters into a light-shielding state and bringing a second part of the plurality of optical shutters into a light-transmitting state in the first display state; and

the shutter panel is configured to arrange a second parallax barrier by bringing a third part of the plurality of optical shutters into a light-shielding state and bringing a fourth part of the plurality of optical shutters into a light-transmitting state in the second display state.

12. The display device according to claim 11 further comprising a control portion configured to control a display using the plurality of pixels in the display panel and an arrangement of a parallax barrier using the plurality of optical shutters in the shutter panel.

13. The display device according to claim 11, wherein a shape of each one of the plurality of pixels is one of a square shape and a substantially square shape.

14. The display device according to claim 11, wherein each one of the A×

B sub-pixels comprises an organic electroluminescence element.

15. The display device according to claim 14, wherein a shape of each one of the A×

B sub-pixels comprises an element configured to supply current corresponding to an image signal to the organic electroluminescence element.

16. An electronic device comprising the display device according to claim 11.