摘要:
A light-emitting diode (“LED”) package and a backlight unit having the same are disclosed. The LED package includes a package substrate, at least two LED chips arranged on the package substrate spaced apart from each other and having different brightness characteristics, a plurality of electrodes mounted on the package substrate to supply electrical power to the LED chips, and electric wires connecting the electrodes to the LED chips.
摘要:
A light source device includes a light source module having a light-emitting block, an image analysis part, a duty ratio calculation part, a duty ratio determination part and a signal generation part. The image analysis part extracts representative luminance data of the light-emitting block based on pixel data. The duty ratio calculation part calculates duty ratio data of the light-emitting block based on the representative luminance data. The duty ratio determination part generates determined duty ratio data of the light-emitting block based on the duty ratio data from a first period, and the signal generation part generates a driving signal having a duty ratio corresponding to the determined duty ratio data to drive the light-emitting block.
摘要:
A method of driving a light source includes: determining a location of pixel data of a display relative to a plurality of light-emitting blocks of a light source, obtaining a plurality of luminance values of the light-emitting blocks corresponding to the location by using a lookup table (LUT) storing the luminance values of the light-emitting blocks, generating a plurality of histograms corresponding to the light-emitting blocks, determining a plurality of target luminance values of the light-emitting blocks using the histograms, and driving the light-emitting blocks using the determined target luminance values. The luminance values of the light-emitting blocks are based on the location of the pixel data within an image block of the display corresponding to each light-emitting block. Each of the histograms indicates a frequency of each of the luminance values of a respective one of the light-emitting blocks.
摘要:
A method of driving a light source includes; driving a plurality of light-emitting blocks included in a light source module at a uniform luminance during an initial period in response to a power-on signal, and subsequently driving the plurality of light-emitting blocks individually in accordance with respective luminances of a plurality of image blocks aligned with each of the plurality of light-emitting blocks after the initial period.
摘要:
A method of driving a light source includes; converting an externally supplied direct current voltage into a first alternating current voltage, boosting the first alternating current voltage to a second alternating current voltage having a higher voltage than the first alternating current voltage, turning on the light source using the second alternating current voltage, detecting an arc noise detection voltage by adding arc noise generated from a high voltage terminal of the light source and arc noise generated from a low voltage terminal of the light source, and blocking the high voltage from being provided to the light source based on the detected arc noise detection voltage.
摘要:
A method of driving a light source includes: determining a location of pixel data of a display relative to a plurality of light-emitting blocks of a light source, obtaining a plurality of luminance values of the light-emitting blocks corresponding to the location by using a lookup table (LUT) storing the luminance values of the light-emitting blocks, generating a plurality of histograms corresponding to the light-emitting blocks, determining a plurality of target luminance values of the light-emitting blocks using the histograms, and driving the light-emitting blocks using the determined target luminance values. The luminance values of the light-emitting blocks are based on the location of the pixel data within an image block of the display corresponding to each light-emitting block. Each of the histograms indicates a frequency of each of the luminance values of a respective one of the light-emitting blocks.
摘要:
A display apparatus includes a display panel, a transformer disposed under the display panel and including a primary winding and a secondary winding which are separated from each other and an insulating section between the primary winding and the secondary winding, and a lower housing member on which the display panel is placed and to which the transformer is fixed. A first region corresponding to the insulating section of the transformer is defined in the lower housing member, and at least one hole is disposed in the first region of the lower housing member.
摘要:
A liquid crystal display includes: a display panel, which displays an image corresponding to a primary image signal, which includes a first image signal, a second image signal and a third image signal; a light-emitting unit, which supplies light to the display panel; and a timing controller, which receives an input including the primary image signal, and outputs a converted image signal. The timing controller converts each of the first image signal, the second image signal and the third image signal on a basis of whichever one of the first image signal, the second image signal and the third image signal is selected, and outputs the converted image signal. The light-emitting unit determines a luminance of the light supplied to the display panel according to a reference grayscale of a reference image signal, the reference image signal being selected among the first image signal, the second image signal and the third image signal.
摘要:
A liquid crystal display includes: a display panel, which displays an image corresponding to a primary image signal, which includes a first image signal, a second image signal and a third image signal; a light-emitting unit, which supplies light to the display panel; and a timing controller, which receives an input including the primary image signal, and outputs a converted image signal. The timing controller converts each of the first image signal, the second image signal and the third image signal on a basis of whichever one of the first image signal, the second image signal and the third image signal is selected, and outputs the converted image signal. The light-emitting unit determines a luminance of the light supplied to the display panel according to a reference grayscale of a reference image signal, the reference image signal being selected among the first image signal, the second image signal and the third image signal.
摘要:
An impulsively driven liquid crystal display includes a display panel displaying an image in response to a gate signal and a data signal, a panel driving circuit providing the gate signal and the data signal to the display panel using an image signal and a control signal, a backlight unit including a plurality of light sources that blink at once to provide a light to the display panel, and a backlight control circuit. The backlight control circuit automatically detects an existence of text information from a received image signal, and if the text is detected to be present, adjusts the blinking timing of the light sources to correspond with the area on the display panel where the text will be displayed, the adjustment being a function of a liquid crystal response delay time of liquid crystals used in the display panel.