Abstract: Disclosed is an organic light emitting display device and a method of driving the same that can improve compensation performance of degradation of a driving TFT. A method of driving an organic light emitting display device comprises generating an estimated degradation value of a driving TFT by using accumulated data through input data counting; compensating all the pixels of a display panel by using a first gain value, which is initially set, and the estimated degradation value; generating a sensing value by sensing all or some of the pixels of the display panel after driving is performed for a certain time; generating a second gain value by compensating the first gain value if an error between the estimated degradation value and the sensing value is more than a reference value; generating compensation data by compensating the estimated degradation value by using the second gain value; and compensating all the pixels of the display panel by using the compensation data.

Abstract: A backlight assembly is disclosed that is capable of enabling easy narrow bezel design and easily radiating heat generated from a light source, and a liquid crystal display device using the same. The backlight assembly includes a bottom cover, a light guide plate placed on the bottom cover, a printed circuit board having an L-shaped form and attached to a bottom surface and inner lateral surface of the bottom cover, and a plurality of Light Emitting Diode (LED) packages being mounted to the printed circuit board, wherein the printed circuit board includes a single metal layer having the L-shaped form and attached to the bottom surface and the inner lateral surface of the bottom cover; and a Resin Coated Copper (RCC) film attached to an inner lateral surface of the single metal layer.

Abstract: A signal driving circuit of a liquid crystal display device includes a column driver for converting video data input into analog signals and applying said analog signals to pixels of a liquid crystal panel, a gamma voltage circuit for applying a plurality of signal voltages to the column driver and an external voltage supplying unit for generating and adjusting signal voltages and a common voltage applied to the gamma voltage circuit and the common electrode, respectively.

Abstract: The present invention provides a color mixing lens which can improve color reproducibility, be made slim and adjust an emission pattern; and a liquid crystal display device having the same. The color mixing lens includes a light receiving portion having at least two light emission diodes positioned at a side for emitting color lights different from each other and light receiving recesses for placing the light emission diodes therein respectively, a color mixing portion formed on the light receiving portion for mixing the lights from the light emission diodes into a white color light, and a light emission portion formed on the color mixing portion for emitting the white light from the color mixing portion through a side thereof.

Abstract: Disclosed is an organic light emitting display device and a method of driving the same that can improve compensation performance of degradation of a driving TFT. A method of driving an organic light emitting display device comprises generating an estimated degradation value of a driving TFT by using accumulated data through input data counting; compensating all the pixels of a display panel by using a first gain value, which is initially set, and the estimated degradation value; generating a sensing value by sensing all or some of the pixels of the display panel after driving is performed for a certain time; generating a second gain value by compensating the first gain value if an error between the estimated degradation value and the sensing value is more than a reference value; generating compensation data by compensating the estimated degradation value by using the second gain value; and compensating all the pixels of the display panel by using the compensation data.

Abstract: A signal driving circuit of a liquid crystal display device includes a column driver for converting video data input into analog signals and applying said analog signals to pixels of a liquid crystal panel, a gamma voltage circuit for applying a plurality of signal voltages to the column driver and an external voltage supplying unit for generating and adjusting signal voltages and a common voltage applied to the gamma voltage circuit and the common electrode, respectively.

Abstract: A signal driving circuit of a liquid crystal display device includes a column driver for converting video data input into analog signals and applying said analog signals to pixels of a liquid crystal panel, a gamma voltage circuit for applying a plurality of signal voltages to the column driver and an external voltage supplying unit for generating and adjusting signal voltages and a common voltage applied to the gamma voltage circuit and the common electrode, respectively.

Abstract: A backlight assembly is disclosed that is capable of enabling easy narrow bezel design and easily radiating heat generated from a light source, and a liquid crystal display device using the same. The backlight assembly includes a bottom cover, a light guide plate placed on the bottom cover, a printed circuit board having an L-shaped form and attached to a bottom surface and inner lateral surface of the bottom cover, and a plurality of Light Emitting Diode (LED) packages being mounted to the printed circuit board, wherein the printed circuit board includes a single metal layer having the L-shaped form and attached to the bottom surface and the inner lateral surface of the bottom cover; and a Resin Coated Copper (RCC) film attached to an inner lateral surface of the single metal layer.

Abstract: The present invention provides a color mixing lens which can improve color reproducibility, be made slim and adjust an emission pattern; and a liquid crystal display device having the same. The color mixing lens includes a light receiving portion having light receiving recesses which respectively house light emission diodes formed at a side surface thereof for positioning at least two light emission diodes at the side surface for producing color lights different from each other, a color mixing portion formed on the light receiving portion for mixing the lights from the light emission diodes into a white color light, and a light emission portion formed on the color mixing portion for emitting the white light from the color mixing portion through a top surface thereof.

Abstract: A backlight unit for a liquid crystal display device includes a plurality of white LEDs on a PCB, along a length direction of the PCB, and emitting white lights, the plurality of white LEDs including first and second LEDs alternately arranged; and a plurality of optical sheets on a path of the white lights from the plurality of white LEDs to a liquid crystal panel, wherein the white light from the first LED and the white light from the second LED are substantially complementary in color to each other with respect to a target white light.

Abstract: The present invention provides a color mixing lens which can improve color reproducibility, be made slim and adjust an emission pattern; and a liquid crystal display device having the same. The color mixing lens includes a light receiving portion having light receiving recesses which respectively house light emission diodes formed at a side surface thereof for positioning at least two light emission diodes at the side surface for producing color lights different from each other, a color mixing portion formed on the light receiving portion for mixing the lights from the light emission diodes into a white color light, and a light emission portion formed on the color mixing portion for emitting the white light from the color mixing portion through a top surface thereof.

Abstract: The present invention provides a color mixing lens which can improve color reproducibility, be made slim and adjust an emission pattern; and a liquid crystal display device having the same. The color mixing lens includes a light receiving portion having at least two light emission diodes positioned at a side for emitting color lights different from each other and light receiving recesses for placing the light emission diodes therein respectively, a color mixing portion formed on the light receiving portion for mixing the lights from the light emission diodes into a white color light, and a light emission portion formed on the color mixing portion for emitting the white light from the color mixing portion through a side thereof.

Abstract: A backlight unit for a liquid crystal display device includes a plurality of white LEDs on a PCB, along a length direction of the PCB, and emitting white lights, the plurality of white LEDs including first and second LEDs alternately arranged; and a plurality of optical sheets on a path of the white lights from the plurality of white LEDs to a liquid crystal panel, wherein the white light from the first LED and the white light from the second LED are substantially complementary in color to each other with respect to a target white light.

Abstract: A liquid crystal display that is capable of improving a display quality of the LCD is disclosed, wherein gamma data for controlling the gamma voltage is stored for each of at least two modes. The gamma data for each mode is accessed in response to a selected mode, and n gamma voltages (wherein n is an integer), each having a different voltage level, indicated by the gamma data in the selected mode are generated. A lookup table is provided in which a color temperature correction data for correcting a color temperature characteristic of an input image is set in correspondence with a gray level value of the input image. The lookup table is accessed to read out color temperature correction data corresponding to the gray level value of the input image. The data lines are driven by the color temperature correction data.

Abstract: A signal driving circuit of a liquid crystal display device includes a column driver for converting video data input into analog signals and applying said analog signals to pixels of a liquid crystal panel, a gamma voltage circuit for applying a plurality of signal voltages to the column driver and an external voltage supplying unit for generating and adjusting signal voltages and a common voltage applied to the gamma voltage circuit and the common electrode, respectively.

Abstract: A system and method for preventing a white-screen error in a liquid crystal display (LCD) device operates by detecting an output voltage signal from a DC/DC converter and reducing a time delay between the output voltage signal and a data signal for the LCD gradually by a fixed value until a timing problem between the output voltage signal and the data signal is overcome. A software reset is executed when the time interval between the output voltage signal and the data signal is too great, causing the output voltage signal to shut down before the data signal is turned on. The process is repeated until the timing is proper such that the output voltage signal is detected to remain when the data signal is output. If the time delay is reduced to a predetermined threshold, then it is determined that a malfunction has occurred, and an alert is provided to a user.

Abstract: A gamma voltage and video data correcting apparatus and method in a liquid crystal display that is capable of improving a display quality of the LCD, wherein gamma data for controlling the gamma voltage is stored for each of at least two modes. The gamma data for each mode is accessed in response to an instruction from a user to select any one of the gamma data for each mode. In response to the gamma data for the selected mode, n gamma voltages (wherein n is an integer), each having a different voltage level, indicated by the gamma data in the selected mode are generated. In the video data correcting method, a lookup table is provided in which a color temperature correction data for correcting a color temperature characteristic of an input image is set in correspondence with a gray level value of the input image. The lookup table is accessed in accordance with the gray level value of the input image to read out color temperature correction data corresponding to the gray level value of the input image.

Abstract: A system and method for preventing a white-screen error in a liquid crystal display (LCD) device operates by detecting an output voltage signal from a DC/DC converter and reducing a time delay between the output voltage signal and a data signal for the LCD gradually by a fixed value until a timing problem between the output voltage signal and the data signal is overcome. A software reset is executed when the time interval between the output voltage signal and the data signal is too great, causing the output voltage signal to shut down before the data signal is turned on. The process is repeated until the timing is proper such that the output voltage signal is detected to remain when the data signal is output. If the time delay is reduced to a predetermined threshold, then it is determined that a malfunction has occurred, and an alert is provided to a user.