Abstract: A liquid crystal display that includes a plurality of pixels configured to display four colors, and a color gamut mapping unit configured to convert three color input image signals into four color image signals, wherein when the three color input image signals include yellow, the color gamut mapping unit converts the three color input image signals based on a hue shift of the yellow.

Abstract: There is provided a method of boosting a local dimming signal. In the method, it is determined whether or not local dimming signals, which are applied for individually driving light source blocks per frame, satisfy boosting conditions. Then, a predetermined local dimming signal corresponding to at least one of the light source blocks is boosted to a reference luminance value when the local dimming signals continuously satisfy the boosting conditions, and the boosting luminance of the predetermined local dimming signal at the reference luminance value is gradually decreased after a light adaptation time of an observer's eye. When the luminance of light source blocks that are boosted is gradually decreased before the light adaptation time or luminance of light source blocks that will be boosted is gradually increased to the light adaptation time, power consumption required to boost the light source blocks may be decreased.

Abstract: A display panel test apparatus includes: an image pickup part which picks up an image from a target display panel; a jig including a receiving part which receives the target display panel, a fixing part which fixes the image pickup part, and an adjusting part which adjusts an image pickup angle of the image pickup part; a pattern generating part which provides the target display panel with a test pattern; a defect extracting part which analyzes test image data provided from the image pickup part using a defect extracting algorithm and extracts display defect information, where the defect extracting algorithm includes different settings corresponding to different types of display defects; and a control part which generates evaluated data corresponding to a viewing angle of the target display panel using the image pickup angle of the image pickup part and the display defect information.

Abstract: A liquid crystal display that includes a plurality of pixels configured to display four colors, and a color gamut mapping unit configured to convert three color input image signals into four color image signals, wherein when the three color input image signals include yellow, the color gamut mapping unit converts the three color input image signals based on a hue shift of the yellow.

Abstract: A method of driving a light source includes converting a reference luminance value of the light source to a first just noticeable difference (JND) value. The JND value represents a minimum noticeable difference between two stimuli. A target luminance value lower than the reference luminance value is determined using the first JND value. A first driving signal applied to the light source is generated using the target luminance value so that a user may not notice a luminance change when a luminance value of a light source is decreased in order to decrease power consumption of a display apparatus.

Abstract: A display panel test apparatus includes: an image pickup part which picks up an image from a target display panel; a jig including a receiving part which receives the target display panel, a fixing part which fixes the image pickup part, and an adjusting part which adjusts an image pickup angle of the image pickup part; a pattern generating part which provides the target display panel with a test pattern; a defect extracting part which analyzes test image data provided from the image pickup part using a defect extracting algorithm and extracts display defect information, where the defect extracting algorithm includes different settings corresponding to different types of display defects; and a control part which generates evaluated data corresponding to a viewing angle of the target display panel using the image pickup angle of the image pickup part and the display defect information.

Abstract: A method of driving a light source includes converting a reference luminance value of the light source to a first just noticeable difference (JND) value. The JND value represents a minimum noticeable difference between two stimuli. A target luminance value lower than the reference luminance value is determined using the first JND value. A first driving signal applied to the light source is generated using the target luminance value so that a user may not notice a luminance change when a luminance value of a light source is decreased in order to decrease power consumption of a display apparatus.

Abstract: There is provided a method of boosting a local dimming signal. In the method, it is determined whether or not local dimming signals, which are applied for individually driving light source blocks per frame, satisfy boosting conditions. Then, a predetermined local dimming signal corresponding to at least one of the light source blocks is boosted to a reference luminance value when the local dimming signals continuously satisfy the boosting conditions, and the boosting luminance of the predetermined local dimming signal at the reference luminance value is gradually decreased after a light adaptation time of an observer's eye. When the luminance of light source blocks that are boosted is gradually decreased before the light adaptation time or luminance of light source blocks that will be boosted is gradually increased to the light adaptation time, power consumption required to boost the light source blocks may be decreased.

Abstract: A device for controlling operation of lamps is provided. The device includes a power outputting part to provide a power voltage to a lamp array having at least one lamp; a temperature sensing part to detect a temperature of the lamp and to generate a temperature signal; and a controlling part to compare the temperature of the lamp with a threshold temperature to generate a first switching signal, in response to the temperature signal, and to output the first switching signal to the power outputting part to feedback control the temperature of the lamp.

Abstract: A surface light source device having improved electrical and mechanical characteristics is provided. The surface light source device includes a light source body including a discharge space to generate a light source, at least one external electrode, which is disposed on an outer surface of one end of the light source body, is extended in a first direction, and applies a discharge voltage to the discharge space, and at least one power transfer unit, combined with the at least one external electrode, to apply the discharge voltage to the at least one external electrode. The at least one power transfer unit is a clip-shaped and clips on the at least one electrode disposed on the outer surface of the light source body.

Abstract: A surface light source device includes a body, a partition member and a visible light generating unit. The body includes first and second substrates. The first substrate has a first discharge region, a first space diving region alternately formed with the first discharge region and a light transmission portion protruded from the first space dividing region. The second substrate faces the first substrate. The partition member is interposed between the first and second substrates to form a discharge space between the first and second substrates. The visible light generating unit disposed at the body generates a visible light. Therefore, dark lines displayed in a conventional display apparatus due to partition members are converted into bright lines, and the bright lines are diffused by the light diffusing patterns or the light diffusing part. Therefore, a luminance and a uniformity of the luminance are enhanced.

Abstract: A device for controlling operation of lamps is provided. The device includes a power outputting part to provide a power voltage to a lamp array having at least one lamp; a temperature sensing part to detect a temperature of the lamp and to generate a temperature signal; and a controlling part to compare the temperature of the lamp with a threshold temperature to generate a first switching signal, in response to the temperature signal, and to output the first switching signal to the power outputting part to feedback control the temperature of the lamp.