Abstract: Discussed is an organic light emitting display device capable of sensing and compensating characteristics of light emitting elements thereof. The organic light emitting display device according to an embodiment includes a light emitting display panel including a plurality of pixels, each pixel having a light emitting element and a pixel driving circuit to drive the light emitting element; and a panel driving unit for supplying compensated data voltages to the plurality of pixels, respectively, sensing at least one characteristic of a driving point of the light emitting element in each of the pixels and a threshold voltage of the light emitting element during at least one of light emission and non-emission periods of the light emitting element, and generating compensated data for the light emitting element, using the sensed characteristic.

Abstract: Disclosed is an OLED display device capable of sensing and correcting a progressive bright point defect and a method of driving the same. The OLED display device includes a data driver for supplying an off-driving voltage to a driving transistor for driving a light emitting element in each sub-pixel, and sensing a voltage corresponding to a leakage current of the driving transistor, and a bright point estimator for estimating a progressive bright point of a sub-pixel by comparing a voltage value sensed through the data driver with a reference value, and darkening and correcting the sub-pixel estimated to have the progressive bright point.

Abstract: Disclosed is an OLED display device capable of sensing and correcting a progressive bright point defect and a method of driving the same. The OLED display device includes a data driver for supplying an off-driving voltage to a driving transistor for driving a light emitting element in each sub-pixel, and sensing a voltage corresponding to a leakage current of the driving transistor, and a bright point estimator for estimating a progressive bright point of a sub-pixel by comparing a voltage value sensed through the data driver with a reference value, and darkening and correcting the sub-pixel estimated to have the progressive bright point.

Abstract: Discussed is an organic light emitting display device capable of sensing and compensating characteristics of light emitting elements thereof. The organic light emitting display device according to an embodiment includes a light emitting display panel including a plurality of pixels, each pixel having a light emitting element and a pixel driving circuit to drive the light emitting element; and a panel driving unit for supplying compensated data voltages to the plurality of pixels, respectively, sensing at least one characteristic of a driving point of the light emitting element in each of the pixels and a threshold voltage of the light emitting element during at least one of light emission and non-emission periods of the light emitting element, and generating compensated data for the light emitting element, using the sensed characteristic.

Abstract: Optical modulator having wide bandwidth based on Fabry-Perot resonant reflection is disclosed. The optical modulator includes: a bottom Distributed Bragg Reflector (DBR) layer; a top DBR layer including at least one layer, and a modified layer; and an active layer disposed between bottom and top DBR layers, wherein the at least one layer includes at least one pair of a first refractive index layer having a first refractive index and a second refractive index layer having a second refractive index, the modified layer includes at least one pair of a third refractive index layer having a third refractive index and a fourth refractive index layer having a fourth refractive index, the third and the fourth refractive indexes being different, and at least one of the third and the fourth refractive index layers has a second optical thickness that is not ?/4 or that is not an odd multiple thereof.

Abstract: Optical modulator having wide bandwidth based on Fabry-Perot resonant reflection is disclosed. The optical modulator includes: a bottom Distributed Bragg Reflector (DBR) layer; a top DBR layer including at least one layer, and a modified layer; and an active layer disposed between bottom and top DBR layers, wherein the at least one layer includes at least one pair of a first refractive index layer having a first refractive index and a second refractive index layer having a second refractive index, the modified layer includes at least one pair of a third refractive index layer having a third refractive index and a fourth refractive index layer having a fourth refractive index, the third and the fourth refractive indexes being different, and at least one of the third and the fourth refractive index layers has a second optical thickness that is not ?/4 or that is not an odd multiple thereof.