Abstract: An organic electroluminescent display device, includes: a gray level extractor that extracts gray levels of frame data signals for a frame image; an image type determiner that determines a type of the frame image using a distribution of the gray levels of the frame data signals, the type of the frame image being one of a low-gray-level type, a medium-gray-level type and a high-gray-level type; a gamma reference voltage generator that selects a set of gamma reference voltages based upon the image type; a data driver converting the frame data signals into frame data voltages using the selected set of gamma reference voltages; a timing controller that supplies the frame data signals to the data driver; and a display area including pixels having an organic light emitting diode that display the frame image.

Abstract: A disclosed display device capable of detecting bonding defects includes: a display panel having an active area used to display images and a pad area in which pads are formed; driver IC (Integrated Circuit) chip mounted on a pad region of the display panel; a flexible printed circuit board bonded to the pad region of the display panel; and a bonding resistance detection circuit disposed in the driver IC chip. The display panel includes: first and second bonding portions formed in a mounting region of the driver IC chip within the pad area of the display panel; and third and fourth bonding portions formed in a bonding region of the flexible printed circuit board within the pad area of the display panel. The first through fourth bonding portions are electrically connected to one another, and the first and second bonding portions are connected to the bonding resistance detection circuit.

Abstract: Disclosed is a flexible display device. The flexible display device includes a display panel configured to include a first substrate that includes a plurality of pixels and a second substrate that is facing-coupled to the first substrate, and a first flexible circuit board connected to the first substrate. A driving IC which supplies a driving signal to the display panel is mounted on the first flexible circuit board. The first substrate includes a display part covered by the second substrate and configured to include the plurality of pixels, a non-display part provided near the display part and coupled to the second substrate, a bending part configured to extend from one side of the non-display part, and bent at a certain curvature, and a pad part connected to one side of the first flexible circuit board.

Abstract: An organic light emitting diode (OLED) display device and a method for driving the same, are capable of achieving an enhancement in response characteristics of OLEDs and an enhancement in display picture quality through application of an overdriving (or accelerated driving) method taking into consideration intrinsic response characteristics of OLEDs. The OLED display device includes an image display panel including a plurality of pixel regions, and a driving integrated circuit for converting digital image data into an analog image signal, generating a plurality of gamma voltage levels through modulation, for overdriving or accelerated driving of the analog image signal, and modulating gray levels of the digital image data such that the modulated gray levels correspond to the modulated gamma voltage levels, for display of an image according to the modulated image data on the image display panel.

Abstract: Disclosed is a flexible display device. The flexible display device includes a display panel configured to include a first substrate that includes a plurality of pixels and a second substrate that is facing-coupled to the first substrate, and a first flexible circuit board connected to the first substrate. A driving IC which supplies a driving signal to the display panel is mounted on the first flexible circuit board. The first substrate includes a display part covered by the second substrate and configured to include the plurality of pixels, a non-display part provided near the display part and coupled to the second substrate, a bending part configured to extend from one side of the non-display part, and bent at a certain curvature, and a pad part connected to one side of the first flexible circuit board.

Abstract: A bonding-defect-detectable display device is disclosed which includes: a display panel defined into an active area used to display images and a pad area in which pads is formed; driver IC (Integrated Circuit) chip loaded on a pad region of the display panel; a flexible printed circuit board mounted to the pad region of the display panel; and a bonding resistance detection unit disposed into the driver IC chip. The display panel includes: first and second bonding portions formed in an occupation region of the driver IC chip within the pad area of the display panel; and third and fourth bonding portions formed in an occupation region of the flexible printed circuit board with the pad area of the display panel.

Abstract: An organic light emitting diode (OLED) display device and a method for driving the same, are capable of achieving an enhancement in response characteristics of OLEDs and an enhancement in display picture quality through application of an overdriving (or accelerated driving) method taking into consideration intrinsic response characteristics of OLEDs. The OLED display device includes an image display panel including a plurality of pixel regions, and a driving integrated circuit for converting digital image data into an analog image signal, generating a plurality of gamma voltage levels through modulation, for overdriving or accelerated driving of the analog image signal, and modulating gray levels of the digital image data such that the modulated gray levels correspond to the modulated gamma voltage levels, for display of an image according to the modulated image data on the image display panel.

Abstract: An organic electroluminescent display device, includes: a gray level extractor that extracts gray levels of frame data signals for a frame image; an image type determiner that determines a type of the frame image using a distribution of the gray levels of the frame data signals, the type of the frame image being one of a low-gray-level type, a medium-gray-level type and a high-gray-level type; a gamma reference voltage generator that selects a set of gamma reference voltages based upon the image type; a data driver converting the frame data signals into frame data voltages using the selected set of gamma reference voltages; a timing controller that supplies the frame data signals to the data driver; and a display area including pixels having an organic light emitting diode that display the frame image.