Organic light emitting display having an onscreen display area controlled differently responsive to an external light, and driving method thereof

1. An organic light emitting display including an organic light emitting display panel, the organic light emitting display comprising:

an emission control driver of the organic light emitting display panel;

a sensor unit for outputting an electrical output signal by sensing an external light;

a signal processing unit for determining an indoor mode or an outdoor mode in accordance with the output signal outputted from the sensor unit;

an onscreen display control unit electrically connected to the signal processing unit and for controlling the emission control driver of the organic light emitting display panel;

a first display area comprising a plurality of first pixels electrically connected to the emission control driver through a plurality of first emission control lines; and

a second display area comprising a plurality of second pixels electrically connected to the emission control driver through at least one second emission control line,

wherein at least two of the second pixels are immediately adjacent each other and are electrically connected to one of the at least one second emission control line and the first pixels coupled to a portion of a same scan line as the at least two of the second pixels are electrically connected to one of the first emission control lines, such that light emission of the at least one of the second pixels is controlled according to the external light independently of the first pixels coupled to the same scan line, and

wherein the second display area is smaller than the first display area.

2. The organic light emitting display as claimed in claim 1 , wherein the sensor unit is on the organic light emitting display panel, and wherein the organic light emitting display panel comprises the second pixels of the second display area and the first pixels of the first display area.

3. The organic light emitting display as claimed in claim 1 , wherein the sensor unit comprises at least one photo-diode.

4. The organic light emitting display as claimed in claim 1 , wherein the signal processing unit comprises:

a signal converting unit electrically connected to the sensor unit and for converting the output signal of the sensor unit into a digital signal; and

a signal determining unit electrically connected to the signal converting unit and for determining the indoor mode or the outdoor mode.

5. The organic light emitting display as claimed in claim 4 , wherein the signal converting unit is adapted to convert the output signal of the sensor unit into a square wave signal, and to eliminate a noise of the output signal of the sensor unit.

6. The organic light emitting display as claimed in claim 1 , wherein the onscreen display control unit is adapted to select at least one of the second pixels of the second display area for controlling emission in accordance with a signal outputted from the signal processing unit.

7. The organic light emitting display as claimed in claim 1 , wherein the onscreen display control unit is adapted to output an electrical signal for allowing the emission control driver to control an emission time of the second display area.

8. The organic light emitting display as claimed in claim 1 , wherein the second pixels of the second display area comprise:

an object pixel on which real information is displayed; and

an outline pixel serving as a boundary line of the object pixel.

9. The organic light emitting display as claimed in claim 8 , wherein, when the object pixel is emitting light, the outline pixel is adapted to display the boundary line of the object pixel by emitting a complementary color of the object pixel or by emitting no light at all.

10. A driving method of an organic light emitting display, the method comprising:

sensing an external light by a sensor unit to output an electrical output signal in accordance with the sensing of the external light by the sensor unit;

processing the output signal of the sensor unit received by a signal processing unit to determine an indoor mode or an outdoor mode and to output a processed output signal;

onscreen display controlling an emission control driver of an organic light emitting display panel by an onscreen display control unit in accordance with the output signal of the signal processing unit received by the onscreen display control unit, the organic light emitting display panel comprising a first display area and a second display area, the first display area comprising a plurality of first pixels; and

emitting light in the second display area comprising second pixels electrically connected to the emission control driver and controlled by the emission control driver, such that light emission of at least two of the second pixels, which are immediately adjacent each other, are controlled according to the external light during the outdoor mode independently of the first pixels coupled to a portion of a same scan line as the at least two of the second pixels,

wherein the second display area is smaller than the first display area.

11. The driving method as claimed in claim 10 , wherein the sensor unit is on the organic light emitting display panel.

12. The driving method as claimed in claim 10 , wherein the sensor unit comprises at least one photo-diode.

13. The driving method as claimed in claim 10 , wherein the processing the output signal comprises:

converting the output signal of the sensor unit into a digital signal by a signal converting unit electrically connected to the sensor unit; and

determining the indoor mode or the outdoor mode with a signal determining unit electrically connected to the signal converting unit.

14. The driving method as claimed in claim 13 , wherein the converting the output signal comprises:

converting the output signal of the sensor unit into a square wave signal by the signal converting unit; and

eliminating a noise component of the output signal of the sensor unit.

15. The driving method as claimed in claim 10 , wherein the onscreen display controlling comprises selecting at least one of the second pixels for controlling emission in accordance with the output signal received from the signal processing unit.

16. The driving method as claimed in claim 10 , wherein the onscreen display controlling comprises outputting an electrical signal by the onscreen display control unit to allow the emission control driver to control an emission time of the display area.

17. The driving method as claimed in claim 10 , wherein the second pixels of the second display area comprise:

an object pixel on which real information is displayed; and

an outline pixel for outlining the object pixel.

18. The driving method as claimed in claim 17 , further comprising:

displaying a boundary line of the object pixel by the outline pixel when the object pixel is emitting light.

19. The driving method as claimed in claim 18 , wherein the displaying the boundary line comprises emitting a complementary color of the object pixel by the outline pixel.

20. The driving method as claimed in claim 18 , wherein the displaying the boundary line comprises emitting no light at all by the outline pixel.