US 8,289,237 C1 (121st)
Pixel and organic light emitting display using the same
Sang-moo Choi, Suwon-si (KR); Wang-jo Lee, Suwon-si (KR); and Bo-yong Chung, Suwon-si (KR)
Filed by Sang-moo Choi, Suwon-si (KR); Wang-jo Lee, Suwon-si (KR); and Bo-yong Chung, Suwon-si (KR)
Assigned to Samsung Display Co., Ltd.
Supplemental Examination Request No. 96/000,113, Dec. 1, 2015.
Reexamination Certificate for Patent 8,289,237, issued Oct. 16, 2012, Appl. No. 12/004,282, Dec. 19, 2007.
Claims priority of application No. 10-2006-0130112 (KR), filed on Dec. 19, 2006.
Ex Parte Reexamination Certificate from Reexamination Ordered under 35 U.S.C. 257 issued on May 8, 2018.
Int. Cl. G09G 3/30 (2006.01); G09G 3/3233 (2016.01)
CPC G09G 3/3233 (2013.01)
OG exemplary drawing
AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT:
Claims 5, 13 and 16-22 are cancelled.
Claims 1-4, 6-12, 14 and 15 are determined to be patentable as amended.
New claims 23-25 are added and determined to be patentable.
1. An organic light emitting display, comprising:
a scan driver configured to sequentially supply a scan signal [ signals ] to a plurality of scan lines during a plurality of subframe periods during [ of ] one frame and to supply a reset signal [ signals ] to a plurality of reset lines;
a data driver configured to apply [ supply ] data signals to a plurality of data lines such that the data signal is [ signals are ] synchronized with the scan signal [ signals] ;
[ a plurality of pixels connected to the scan lines and the reset lines, wherein the pixels include ] a plurality of [ red ] pixels configured to emit red light each connected to the scan lines and the reset lines;
a plurality of [ green ] pixels configured to emit green light each connected to the scan lines and the reset lines; and
a plurality of [ blue ] pixels configured to emit blue light each connected to the scan lines and the reset lines; [ , ]
wherein the scan driver is configured to control the duration of [ a ] light emission periods [ period] , and the duration of the [ light ] emission period for each of the pixels is based on the color of the light emitted by [ each of ] the pixel [ pixels] , and
wherein each of the pixels comprises:
an organic light emitting diode,
a first transistor having a gate electrode connected to a scan line and a first electrode connected to a data line, the first transistor configured to be turned on when a scan signal is supplied to the scan line,
a second transistor having a gate electrode connected to a second electrode of the first transistor, a first electrode connected to a first power source and a second electrode connected to the organic light emitting diode, the second transistor configured to control an electric current flowing from the first power source to a second power source through the organic light emitting diode according to a data voltage from the data line, and
a storage capacitor having one terminal connected to the second electrode of the first transistor and the gate electrode of the second transistor, and another terminal connected to a reset line,
wherein if a reset signal is supplied to the reset line, the storage capacitor couples the reset signal to the second transistor, and in response to the coupled reset signal, the second transistor is turned off [ ,
wherein the duration of the light emission period of each of the blue pixels is shorter than the duration of the light emission period of each of the red pixels,
wherein the duration of the light emission period of each of the green pixels is longer than the duration of the light emission period of each of the red pixels, and
wherein the scan driver is configured to supply a corresponding one of the reset signals to a corresponding one of the reset lines a plurality of times during one frame to turn off a corresponding one of the second transistors a plurality of times during the one frame] .
2. The organic light emitting display according to claim 1, wherein the scan driver is configured to control the duration of [ a ] reset signal periods [ period] , and the duration of the reset signal period for each of the pixels is based on the color of the light emitted by [ each of ] the pixel [ pixels] .
3. The organic light emitting display according to claim 1 [ 2] , wherein durations [ the duration ] of the light emission periods [ period ] of [ each of ] the pixels correspond [ corresponds ] to the durations [ duration ] of the reset periods [ signal period ] of [ each of ] the pixels.
4. The organic light emitting display according to claim 3, wherein the sums of the duration of the light emission period and the duration of the reset [ signal ] period of each of the pixels is [ are ] substantially the same.
6. The organic light emitting display according to claim 1, wherein the duration of the light emission period of each of the pixels is based on an expected lifetime of the pixels [ thereof] .
7. The organic light emitting display according to claim 1, wherein the reset signal is [ signals are ] capacitively coupled to each of the pixels.
8. The organic light emitting display according to claim 1, wherein the storage capacitor [ of each pixel ] is configured to store a [ one of the ] data signal [ signals ] which controls the light emission of the [ each ] pixel.
9. An organic light emitting display, comprising:
a scan driver configured to sequentially supply a scan signal [ signals ] to a plurality of scan lines during a plurality of subframe periods during [ of ] one frame and to supply a reset signal [ signals ] to a plurality of reset lines;
a data driver configured to apply [ supply ] data signals to a plurality of data lines such that the data signal is [ signals are ] synchronized with the scan signal [ signals] ;
[ a plurality of pixels connected to the scan lines and the reset lines, wherein the pixels include ] a plurality of [ red ] pixels configured to emit red light each connected to the scan lines and the reset lines;
a plurality of [ green ] pixels configured to emit green light each connected to the scan lines and the reset lines; and
a plurality of [ blue ] pixels configured to emit blue light each connected to the scan lines and the reset lines; [ ,]
wherein the scan driver is configured to control the duration of [ a ] light emission periods [ period] , and the duration of the [ light ] emission period for each of the pixels is based on the color of the light emitted by [ each of ] the pixel [ pixels, ] and
wherein each of the pixels comprises:
an organic light emitting diode,
a transistor, configured to control an electric current flowing through the organic light emitting diode according to a data voltage, and
a storage capacitor having one terminal connected to the transistor, and another terminal connected to a reset line,
wherein if a reset signal is supplied to the reset line, the storage capacitor couples the reset signal to the transistor, and in response to the coupled reset signal, the transistor is turned off [ ,
wherein the duration of the light emission period of each of the blue pixels is shorter than the duration of the light emission period of each of the red pixels,
wherein the duration of the light emission period of each of the green pixels is longer than the duration of the light emission period of each of the red pixels, and
wherein the scan driver is configured to supply a corresponding one of the reset signals to a corresponding one of the reset lines a plurality of times during one frame to turn off a corresponding one of the transistors a plurality of times during the one frame] .
10. The organic light emitting display according to claim 9, wherein the scan driver is configured to control the duration of [ a ] reset signal periods [ period] , and the duration of the reset signal period for each of the pixels is based on the color of the light emitted by [ each of ] the pixel [ pixels] .
11. The organic light emitting display according to claim 9 [ 10] , wherein durations [ the duration ] of the light emission periods [ period ] of [ each of ] the pixels correspond [ corresponds ] to the durations [ duration ] of the reset periods [ signal period ] of [ each of ] the pixels.
12. The organic light emitting display according to claim 11, wherein the sums of the duration of the light emission period and the duration of the reset [ signal ] period of each of the pixels is are substantially the same.
14. The organic light emitting display according to claim 9, wherein the duration of the light emission period of each of the pixels is based on an expected lifetime of the pixels [ thereof] .
15. The organic light emitting display according to claim 9, wherein the reset signal is [ signals are ] capacitively coupled to each of the pixels.
[ 23. The organic light emitting display according to claim 1, wherein the first power source is configured to provide a first power, wherein the second power source is configured to provide a second power less than the first power, and wherein the organic light emitting diode is interposed between and directly connected to the second power source and the second transistor.]
[ 24. The organic light emitting display according to claim 23, wherein the second power is a ground voltage.]
[ 25. The organic light emitting display according to claim 24, wherein an anode of the organic light emitting diode is connected to the second transistor, and a cathode of the organic light emitting diode is connected to the ground voltage of the second power source.]