Abstract: The present invention provides an image display device that forms an image with a display output that is a combination of quantities of backlight of at least three colors and sub-pixel transmittances of at least three colors, comprising: a memory means in which the light-emission wavelength distribution characteristics of the quantities of backlight and the transmission wavelength distribution characteristics of the sub-pixel transmittances are stored, wherein: the light-emission wavelength distribution characteristics and transmission wavelength distribution characteristics are read out from the memory means, and the sub-pixel transmittances based on the quantities of backlight are obtained.

Abstract: In a liquid crystal apparatus in which a white light of a fluorescent tube corresponding to a linear light source repeats plural times of diffusions and reflections between a reflection sheet and a diffusion plate, and is thereafter input as a back light to a liquid crystal panel corresponding to a display screen, an object of the invention is to make it possible to secure a brightness uniformity even if the liquid crystal apparatus is thinned. It is possible to prevent a brightness unevenness caused by a short distance from the reflection sheet to the diffusion plate, by preventing a deformation (a deformation which is convex toward the fluorescent tube) of the diffusion plate due to a thermal expansion of the diffusion plate caused by a heat generation of the fluorescent tube, by arranging at least one pin mold hold so as to support a portion near an approximately center of the diffusion plate.

Abstract: The present invention provides an illumination device capable of improving an efficiency of acquiring light emitted by light emitting diodes, which are provided in a light source module and used as a light source, and capable of achieving a uniform luminance distribution, and provides a liquid crystal display device using the illumination device. The illumination device includes a circuit board, red, green and blue light emitting diodes, and a lens body. Each red, green and blue light emitting diode is mounted on the circuit board and connected with a wiring pattern formed on the circuit board. The lens covers the red, green and blue light emitting diodes, and includes first portions each having two first side surfaces and second portions each having two second side surfaces. The first and second portions are alternately arranged. A distance between the first side surfaces is larger than a distance between the second side surfaces.

Abstract: A liquid crystal display apparatus that includes a liquid crystal display panel having a liquid crystal layer held between a pair of substrates, a light source whose brightness is controllable, and a normalization processing circuit that converts an image signal to a normalized signal and to a normalization coefficient. In addition, the display apparatus includes an LCD driving circuit that converts the normalized signal to an LCD driving signal for driving the liquid crystal display panel, and a light source driving circuit that converts the normalization coefficient to a light source driving signal for driving the light source. The normalization coefficient is used to set pixel values in a blanking interval of a display screen, and the normalized signal is used to set pixel values in a display area of the display screen.

Abstract: In a liquid crystal display device and a video display device using the same, for suppressing light unevenness at the end of a display region, the video display device is provided with a liquid crystal display device and a housing configured to support the liquid crystal display device, wherein the liquid crystal display device includes a liquid crystal panel, a first frame and a liquid crystal support member which interpose the liquid crystal panel therebetween, a light guide plate which is disposed at the liquid crystal support member on a side opposite to a side where the liquid crystal panel is disposed, and a light source which is disposed at a side surface of the light guide plate, and wherein a cushion member is disposed between the liquid crystal support member and the light guide plate.

Abstract: The liquid crystal display apparatus includes a liquid crystal panel and the back light device for emitting the light from a light source to the liquid crystal panel through a lens. The light source includes a first LED for emitting the light of a first color, a second LED for emitting the light of a second color, a third LED for emitting the light of a third color, a fourth LED for emitting the light of the third color, a fifth LED for emitting the light of the second color, and a sixth LED for emitting the light of the first color. The first, second, third, fourth, fifth and sixth LEDs are arranged on the wiring board in such a manner as to offset the deviation of the light distribution.

Abstract: The liquid crystal display apparatus includes a liquid crystal display, a backlight unit for emitting rays of light of three or more colors, the ray of each color being controlled, and applying these rays of light onto the liquid crystal display. A controller is further provided for controlling a change of display data of each color of the liquid crystal display and an emitted light quantity of each color of the backlight unit at a time, based on a video signal being inputted for displaying the corresponding image and an output signal sent from an ambient light sensor for sensing ambient light.

Abstract: An LED lighting device can compensate a brightness change and a color change caused by a temperature change and exhibit an in-plane uniform luminance and color. A lighting device includes: at least one line connected in parallel, a constant voltage source for applying a constant voltage to the line, an ON/OFF controller, and a current detector for measuring a value of current flowing in the line. The line is formed by one or more light-emitting diodes and a switch for turning ON/OFF the current flowing in the light emitting diodes connected in series. According to the current value of each of the lines measured by the current detector, the ON/OFF controller controls the ON/OFF period of the switch of each of the lines.

Abstract: An object of the present invention is to provide a liquid crystal display appliance for controlling a plurality of divided area in the display screen. In order to achieve the above object, the liquid crystal display appliance according to the present invention includes a lighting apparatus which includes a light source, and an light guide plate to diffuse lights from the light source to obtain a surface light source; and a liquid crystal panel which is placed opposed to the lighting apparatus and includes a liquid crystal layer. The light guide plate is made by bonding a plurality of transparent light guide members each of which has a different refractive index greater than 1.

Abstract: In a liquid crystal display equipped with a side edge backlight device, visualization of “a dot provided to a light guide plate” in the vicinity of the light source while keeping the luminance of the display screen. The shapes and the arrangement of the light diffusing dots (dots) provided to the principal surface of the light guide plate of the backlight device are made different between the area of the principal surface in the vicinity of the light source and the other areas, thereby adjusting the whiteness of the light guide plate in the vicinity of the light source. The plurality of dots formed in the vicinity of the light source are each composed of a first section for diffusing the light propagating the light guide plate, and a second section surrounded by the first section and less capable of diffusing the light, and are disposed in the vicinity of the light source in a zigzag manner.

Abstract: An object is to provide a liquid crystal display device having a thin structure with a backlight device appropriate for illuminating a liquid crystal panel where there is no area in band form where the brightness is inconsistent. The size of the diffusion plate 103b that forms the optical sheet 134 of the backlight device 103 is made smaller than the opening for illumination Do in the diffusion region D, and the diffusion plate 103b is not provided in the vicinity of the end portions of the opening for illumination Do in the configuration. In this configuration, the reflection properties are different between in the vicinity of the end portions and the center portion of the opening for illumination Do, and the brightness increases in the vicinity of the end portions of the backlight device 103, so that an area in band form where the brightness is inconsistent can be prevented from being created in the end portions of the liquid crystal display device.

Abstract: To provide a liquid crystal display device having excellent uniformity in the brightness so that the performance of displays of liquid crystal can be increased. A liquid crystal display device is provided with: a support member: a heat releasing member provided on this support member; a light guiding plate 121 provided on a rear surface of a liquid crystal panel; and a light source module 124 which is thermally secured to the heat releasing member so as to face an entrance surface 121a formed on one or two sides in the direction of the length of the light guiding plate 121 and has a light source for emitting a light beam toward the entrance surface 121a, wherein the light source is covered with a lens 124c in the light source module 124, and the distance D between the lens 124c and the entrance surface 121a when the light source module 124 is not driven is set within a certain range.

Abstract: The present invention provides a liquid crystal display appliance in which portions of a liquid crystal display panel over luminescent lamps are not seen extraordinarily brighter and brightness of the liquid crystal display panel does not lower significantly at portions in the vicinity of the vertical direction edge of the liquid crystal display panel if a lighting system becomes thinner than 20 mm. This liquid crystal display appliance comprises a lighting system, in which a distance D between light reflector sheet 5 and a light diffuser plate 11 is between 7 and 13 mm, the distance D and an interval p between 2 adjacent luminescent lamps satisfy an inequality, p?1.34×D+9, and the distance D and a length e between a boundary between an upper edge surface 6a and an inclined surface 5b of the light diffuser plate 11 and a nearest luminescent lamp from the boundary satisfy another inequality, e?1.6×D+4.

Abstract: An LED lighting device can compensate a brightness change and a color change caused by a temperature change and exhibit an in-plane uniform luminance and color. A lighting device includes: at least one line connected in parallel, a constant voltage source for applying a constant voltage to the line, an ON/OFF controller, and a current detector for measuring a value of current flowing in the line. The line is formed by one or more light-emitting diodes and a switch for turning ON/OFF the current flowing in the light emitting diodes connected in series. According to the current value of each of the lines measured by the current detector, the ON/OFF controller controls the ON/OFF period of the switch of each of the lines.

Abstract: In a liquid crystal apparatus in which a white light of a fluorescent tube corresponding to a linear light source repeats plural times of diffusions and reflections between a reflection sheet and a diffusion plate, and is thereafter input as a back light to a liquid crystal panel corresponding to a display screen, an object of the invention is to make it possible to secure a brightness uniformity even if the liquid crystal apparatus is thinned. It is possible to prevent a brightness unevenness caused by a short distance from the reflection sheet to the diffusion plate, by preventing a deformation (a deformation which is convex toward the fluorescent tube) of the diffusion plate due to a thermal expansion of the diffusion plate caused by a heat generation of the fluorescent tube, by arranging at least one pin mold hold so as to support a portion near an approximately center of the diffusion plate.

Abstract: An illumination device has at least one fluorescent tube, a lower frame supporting the fluorescent tube, a light diffusion plate which opposes the lower frame with the fluorescent tube being interposed therebetween for forward diffusion of output light of the fluorescent tube, a reflection sheet disposed along the fluorescent tube side of the lower frame for reflecting the fluorescent light toward the light diffuser plate, and an upside reflector covering an electrode of the fluorescent tube for reflecting the light toward the light diffuser. When letting a direction along a length of the fluorescent tube be a horizontal direction, a distance between the fluorescent tube and the reflection sheet at at least one of nearby portions of right and left ends of the illuminator is greater than such distance at a central portion thereof. A liquid crystal display (LCD) apparatus using the illuminator is also disclosed.

Abstract: A thin light source unit employs a plurality of light emitting diode chips in multiple colors to generate highly uniform white light at a low cost and with a high light utilization efficiency. The light source unit has light emitting diode chips, lead frames, and a transparent sealer. A plurality of the light emitting diode chips in the same color are connected in series to three or more sets of the lead frames. The light emitting diode chips in at least three different colors are integrally sealed with the transparent sealer. An illuminating apparatus using the light source units, and a display apparatus using the illuminating apparatus are also provided.

Abstract: The present invention provides an illumination device capable of improving an efficiency of acquiring light emitted by light emitting diodes, which are provided in a light source module and used as a light source, and capable of achieving a uniform luminance distribution, and provides a liquid crystal display device using the illumination device. The illumination device includes a circuit board, red, green and blue light emitting diodes, and a lens body. Each red, green and blue light emitting diode is mounted on the circuit board and connected with a wiring pattern formed on the circuit board. The lens covers the red, green and blue light emitting diodes, and includes first portions each having two first side surfaces and second portions each having two second side surfaces. The first and second portions are alternately arranged. A distance between the first side surfaces is larger than a distance between the second side surfaces.

Abstract: An object of the present invention is to provide a liquid crystal display device having a light guide plate that is capable of providing improved liquid crystal display performance without generating a striped image. The liquid crystal display device includes a light guide plate, which illuminates a liquid crystal panel from its rear surface, and light sources, which shed a light ray on the light guide plate. The rear surface of the light guide plate is separated into a plurality of rear surface divisions by concave grooves. The light sources can adjust the brightness of each rear surface division. The display performance of the liquid crystal panel is improved by individually managing a plurality of regions of the liquid crystal panel, which correspond to the rear surface divisions, and darkening a rear surface division that corresponds to a region where the black color is predominant.

Abstract: The video display apparatus has a light modulation device for forming a picture in accordance with a video signal and a lighting unit for irradiating, on the light modulation device, illumination light necessary to cause it to display the picture. In the apparatus, the lighting unit irradiates the illumination light in sequence of individual plural illumination light source partitive areas, a luminance distribution calculating unit calculates luminance distributions of video signals corresponding to the plural partitive areas to determine illumination light luminance levels of the individual partitive areas, an illumination controller controls rays of the illumination light of individual areas of the lighting unit on the basis of determination by the luminance distribution calculating unit, and a video corrector corrects the video signal inputted to the light modulation device on the basis of the determination by the luminance distribution calculating unit.