Light emitting display panel and light emitting display apparatus using the same

1 . A light emitting display panel comprising:

a display area including subpixels and a non-display area outside of the display area,

wherein each of the subpixels includes:

a driving transistor configured to supply a driving current;

a first light emitting unit configured to be driven by a first viewing angle control transistor; and

a second light emitting unit configured to be driven by a second viewing angle control transistor,

wherein a shape of a first lens included in the first light emitting unit is different than a shape of a second lens included in the second light emitting unit,

wherein a polarity type of the first viewing angle control transistor is different than a polarity type of the second viewing angle control transistor,

wherein a first gate of the first viewing angle control transistor and a second gate of the second viewing angle control transistor are configured to receive a same viewing angle control signal to selectively control the supply of the driving current from the driving transistor to the first and second light emitting units, respectively, by turning one of the first and second viewing angle control transistors on while another one of the first and second viewing angle control transistors is turned off,

wherein the display area is divided into a first portion and a second portion,

wherein a first group of subpixels corresponding to the first portion are configured to display a first image with a wide viewing angle while a second group of subpixels corresponding to the second portion are configured to display a second image with a narrow viewing angle,

wherein at least three sides of the first portion displaying the first image with the wide viewing angle are surrounded by the second portion displaying the second image with the narrow viewing angle, and

wherein first image displayed in the first portion corresponds to a warning or notification while the second image displayed in the second portion corresponds to entertainment content.

2 . The light emitting display panel of claim 1 , wherein the first viewing angle control transistor is an N-type transistor, and the second viewing angle control transistor is a P-type transistor, or

wherein the first viewing angle control transistor is a P-type transistor, and the second viewing angle control transistor is an N-type transistor.

3 . The light emitting display panel of claim 1 , wherein the first viewing angle control transistor is connected between the first light emitting unit and the driving transistor configured to control a magnitude of the driving current supplied to the first light emitting unit or the second light emitting unit, and

wherein the second viewing angle control transistor is connected between the driving transistor and the second light emitting unit.

4 . The light emitting display panel of claim 1 , wherein the first light emitting unit includes:

a first light emitting device configured to be driven by the first viewing angle control transistor; and

the first lens disposed on the first light emitting device, and

wherein the second light emitting unit includes:

a second light emitting device configured to be driven by the second viewing angle control transistor; and

the second lens disposed on the second light emitting device.

5 . The light emitting display panel of claim 1 , wherein the display area is divided into light emitting areas including at least two light emitting areas disposed along a first direction and at least two light emitting areas disposed along a second direction different than the first direction,

wherein gates of first viewing angle control transistors and second viewing angle control transistors in an sth light emitting area among the light emitting areas are connected to an sth viewing angle control line configured to receive an sth viewing angle control signal, wherein s is a natural number less than a number of the light emitting areas, and

wherein gates of first viewing angle control transistors and second viewing angle control transistors in an s+1th light emitting area among the light emitting areas are connected to an s+1th viewing angle control line configured to receive an s+1th viewing angle control signal.

6 . The light emitting display panel of claim 5 , wherein the sth viewing angle control line and the s+1th viewing angle control line are connected to a control driver configured to generate the sth viewing angle control signal and the s+1th viewing angle control signal.

7 . A light emitting display apparatus comprising:

a display area including subpixels and a non-display area outside of the display area,

wherein each of the subpixels includes:

a driving transistor configured to supply a driving current;

a first light emitting unit configured to be driven by a first viewing angle control transistor; and

a second light emitting unit configured to be driven by a second viewing angle control transistor,

wherein a first viewing angle of a light output from the first light emitting unit is different than a second viewing angle of a light output from the second light emitting unit,

wherein the display area is divided into light emitting areas including at least two light emitting areas disposed along a first direction and at least two light emitting areas disposed along a second direction different than the first direction,

wherein the light emitting areas are configured to selectively emit light via only first light emitting units or via only second light emitting units,

wherein a polarity type of the first viewing angle control transistor is different than a polarity type of the second viewing angle control transistor,

wherein a first gate of the first viewing angle control transistor and a second gate of the second viewing angle control transistor are configured to receive a same viewing angle control signal to selectively control the supply of the driving current from the driving transistor to the first and second light emitting units, respectively, by turning one of the first and second viewing angle control transistors on while another one of the first and second viewing angle control transistors is turned off,

wherein the display area is divided into a first portion and a second portion,

wherein a first group of subpixels corresponding to the first portion are configured to display a first image with a wide viewing angle while a second group of subpixels corresponding to the second portion are configured to display a second image with a narrow viewing angle,

wherein at least three sides of the first portion displaying the first image with the wide viewing angle are surrounded by the second portion displaying the second image with the narrow viewing angle, and

wherein first image displayed in the first portion corresponds to a warning or notification while the second image displayed in the second portion corresponds to entertainment content.

8 . The light emitting display apparatus of claim 7 , wherein the first viewing angle control transistor is connected between the first light emitting unit and the driving transistor configured to control a magnitude of the driving current supplied to the first light emitting unit or the second light emitting unit, and

wherein the second viewing angle control transistor is connected between the driving transistor and the second light emitting unit.

9 . The light emitting display apparatus of claim 7 , wherein each of the light emitting areas is configured to be independently driven.

10 . The light emitting display apparatus of claim 7 , wherein the first viewing angle control transistor is an N-type transistor, and the second viewing angle control transistor is a P-type transistor, or

wherein the first viewing angle control transistor is a P-type transistor, and the second viewing angle control transistor is an N-type transistor.

11 . The light emitting display apparatus of claim 7 , wherein when the first viewing angle control transistor is turned on, the second viewing angle control transistor is turned off, and

wherein when the first viewing angle control transistor is turned off, the second viewing angle control transistor is turned on.

12 . The light emitting display apparatus of claim 7 , wherein the first light emitting unit includes:

a first light emitting device configured to be driven by the first viewing angle control transistor; and

a first lens disposed on the first light emitting device, and

wherein the second light emitting unit includes:

a second light emitting device configured to be driven by the second viewing angle control transistor; and

a second lens disposed on the second light emitting device.

13 . The light emitting display apparatus of claim 12 , wherein a viewing angle of a light output from the first light emitting device through the first lens and a viewing angle of a light output from the second light emitting device through the second lens are different from each other.

14 . The light emitting display apparatus of claim 7 , wherein gates of first viewing angle control transistors and second viewing angle control transistors in an sth light emitting area among the light emitting areas are connected to an sth viewing angle control line configured to receive an sth viewing angle control signal, wherein s is a natural number less than the number of the light emitting areas, and

wherein gates of first viewing angle control transistors and second viewing angle control transistors in an s+1th light emitting area among the light emitting areas are connected to an s+1th viewing angle control line configured to receive an s+1th viewing angle control signal.

15 . The light emitting display apparatus of claim 14 , wherein the sth viewing angle control line and the s+1th viewing angle control line are connected to a control driver configured to generate the sth viewing angle control signal and the s+1th viewing angle control signal.

16 . A display device comprising:

a display panel divided into a plurality of light emitting areas, each of the plurality of light emitting areas including a plurality of first type subpixels each including a first light emitting element configured to emit a color light with a wide viewing angle based on control by a first viewing angle control transistor, and a plurality of second type subpixels each including a second light emitting element configured to emit the color light with a narrow viewing angle smaller than the wide viewing angle based on control by a second viewing angle control transistor, the first light emitting element and the second light emitting element being configured to receive a driving current from a same driving transistor; and

a controller configured to:

activate the plurality of second type subpixels within at least one of the plurality of light emitting areas to display first content with the narrow viewing angle while the plurality of first type subpixels within the at least one of the plurality of light emitting areas remain off based on a same viewing angle control signal,

activate the plurality of first type subpixels within remaining light emitting areas among the plurality of light emitting areas to display second content with the wide viewing angle while the plurality of second type subpixels within the remaining light emitting areas remain off based on the same viewing angle control signal,

wherein a first gate of the first viewing angle control transistor and a second gate of the viewing angle control transistor are configured to receive the same viewing angle control signal to selectively control supply of the driving current from the same driving transistor to the first and second light emitting elements, respectively, by turning one of the first and second viewing angle control transistors on and another one of the first and second viewing angle control transistors off,

wherein the display panel is divided into a first portion and a second portion,

wherein a first group of subpixels corresponding to the first portion are configured to display a first image with a wide viewing angle while a second group of subpixels corresponding to the second portion are configured to display a second image with a narrow viewing angle,

wherein at least three sides of the first portion displaying the first image with the wide viewing angle are surrounded by the second portion displaying the second image with the narrow viewing angle, and

wherein first image displayed in the first portion corresponds to a warning or notification while the second image displayed in the second portion corresponds to entertainment content.

17 . The display device of claim 16 , further comprising:

a plurality of semi-cylindrical shaped lenses respectively disposed on the plurality of first type subpixels in each of the plurality of light emitting areas; and

a plurality of hemispherical shaped lenses respectively disposed on the plurality of second type subpixels in each of the plurality of light emitting areas.

18 . The display device of claim 16 , further comprising:

a first viewing angle control transistor connected to the first light emitting element; and

a second viewing angle control transistor connected to the second light emitting element,

wherein a gate of the first viewing angle control transistor and a gate of second viewing angle control transistor are both connected to a same viewing angle control line.

19 . The display device of claim 16 , wherein the controller is further configured to:

selectively control the plurality of light emitting areas to operate in a share mode corresponding to the wide viewing angle or a privacy mode corresponding to the narrow viewing angle on a light emitting area by light emitting area basis.

20 . The display device of claim 19 , wherein the plurality of light emitting areas are arranged in a grid including at least two rows and at least two columns.

21 . The display device of claim 19 , wherein the controller is further configured to:

in response to a user input, transition one of the plurality of light emitting areas from displaying content in the share mode with the wide viewing angle to displaying content in the privacy mode with the narrow viewing angle.