Patent application number | Description | Published |
20080284946 | Lighting System and Liquid Crystal Display Using the Same - A lighting system has light-emitting diodes as light sources mounted on a circuit board, in which the light-emitting diodes include a red light-emitting diode, blue light-emitting diode and a green light-emitting diode, the light-emitting diodes are constituted of one single unit including one for each of the red, blue and green light-emitting diodes, and the one single unit is repeatedly arranged as plural pieces on the same circuit board, and each of the red, blue and green light-emitting diodes is individually connected electrically to emit a light. | 11-20-2008 |
20080297695 | Liquid Crystal Display Device - 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. | 12-04-2008 |
20080298055 | Illumination device and liquid crystal display device using the same - 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. The three red, green and blue light emitting diodes are provided in each first portion of the lens. | 12-04-2008 |
20090059121 | Illumination Unit and Display Unit Incorporating the Same - 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. | 03-05-2009 |
20090066874 | LIQUID CRYSTAL DISPLAY APPARATUS - 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. | 03-12-2009 |
20090096951 | Liquid Crystal Display Device - 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. | 04-16-2009 |
20090096955 | Liquid Crystal Display Appliance and Lighting System - 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 | 04-16-2009 |
20090109373 | Liquid Crystal Display - 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. | 04-30-2009 |
20090167990 | Liquid Crystal Display Appliance - 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. | 07-02-2009 |
20090190065 | LED Lighting Device And LCD Device Using The Same - 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. | 07-30-2009 |
20100066943 | BACK LIGHT DEVICE, LIQUID CRYSTAL DISPLAY APPARATUS AND IMAGE DISPLAY APPARATUS USING THE SAME - 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. | 03-18-2010 |
20100073582 | LIQUID CRYSTAL DISPLAY DEVICE AND VIDEO DISPLAY DEVICE USING THE SAME - 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. | 03-25-2010 |
20110128306 | Liquid Crystal Display Apparatus Capable of Maintaining High Color Purity - A liquid crystal display apparatus includes a white color light source and a coloring light source, a detection circuit which detects a brightness of an input image signal, an image quality processing calculation circuit, a light source control circuit, and an image control circuit. The coloring light source includes a blue light source. The image quality processing calculation circuit outputs to the light source control circuit a light source control signal for (1) increasing a light intensity of the coloring light source when an average luminance of the input image signal is detected to be higher than a predetermined luminance based on a detection result of the detection circuit, and for (2) turning-on only the white color light source without turning-on the coloring light source when the average luminance of the input image signal is detected to be lower than the predetermined luminance. | 06-02-2011 |
20110147777 | ORGANIC LIGHT-EMITTING DIODE AND LIGHT SOURCE DEVICE INCLUDING SAME - An organic light-emitting diode in accordance with the present invention includes: a reflective electrode; an organic layer formed on the reflective electrode; a transparent electrode formed on the organic layer; a transparent resin layer formed on the transparent electrode; and an encapsulation glass formed on the transparent resin layer. The organic layer includes a light-emitting point. Cone- or pyramid-shaped transparent resin structures are provided in the transparent resin layer in such a manner that each of the cone- or pyramid-shaped transparent resin structures splays from the transparent resin layer toward the encapsulation glass in a normal direction of the encapsulation glass. A refractive index of the transparent resin layer is 1.3 times or more to 1.6 times or less as high as that of the cone- or pyramid-shaped transparent resin structures. | 06-23-2011 |
20110278557 | ORGANIC LIGHT EMITTING DIODE AND LIGHT SOURCE DEVICE INCLUDING THE SAME - An organic light emitting diode has a reflection electrode, an organic layer with a luminous point, a transparent electrode, an output-side substrate, and a light scattering layer in contact with the output-side substrate. The light scattering layer is made of a base material and particles contained therein. These particles are higher in refractive index than the base material and the output-side substrate. The luminous point emits light at an emission peak wavelength λ (nm). Letting a height from an interface between the electrode and the organic layer to the luminous point be “a×d” (where d (nm) is the thickness of the organic layer, | 11-17-2011 |
20130015496 | Power Semiconductor DeviceAANM Konno; AkitoyoAACI HitachiAACO JPAAGP Konno; Akitoyo Hitachi JPAANM Azuma; KatsunoriAACI HitachiAACO JPAAGP Azuma; Katsunori Hitachi JPAANM Ando; TakashiAACI HitachiAACO JPAAGP Ando; Takashi Hitachi JP - A power semiconductor device is provided in which reliability can be improved when the parallel number of semiconductor devices increases. When a bonding face on collector electrode is on an upper side, and a bonding face on emitter electrode is on a lower side, a collector electrode joint region as a joint region between a collector trace and a collector electrode on a chip mounted substrate and an emitter electrode joint region as a joint region between an emitter trace and an emitter electrode are located at a same position in an up-and-down direction and are adjacent in a right-and-left direction at an interval of 2 mm or more and 4 mm or less. | 01-17-2013 |
20130056717 | ORGANIC LIGHT-EMITTING DEVICE AND LIGHT SOURCE APPARATUS USING SAME - An organic light-emitting device including a first substrate, a second substrate, a light drawing-out layer disposed between the first substrate and the second substrate, a transparent electrode disposed between the light drawing-out layer and the first substrate, a reflection electrode disposed between the transparent electrode and the first substrate, and a first light-emitting unit disposed between the transparent electrode and the reflection electrode. The first light-emitting unit includes a first light-emitting layer that emits a first light-emitting color. In the organic light-emitting device, relations of the equation L | 03-07-2013 |
20130154473 | ADHESIVE SHEET, AS WELL AS OPTICAL MEMBER AND ORGANIC LIGHT EMISSION DEVICE USING THE SAME - An adhesive sheet | 06-20-2013 |
20130285039 | Organic Light-Emitting Device and Light Source Device Using the Same - In order to improve an external quantum efficiency of an organic light-emitting element, a first light extraction layer is formed over the surface of a second substrate on the side where the second substrate is present, a second light extraction layer is formed over the surface of the second substrate on the other side, the first and second light extraction layers contain fine particles and a binder, the average particle diameter of the fine particles contained in the first and second light extraction layers are 0.05 μm or more and 2 μm or less and 1 μm or more and 10 μm or less, respectively, and an optical length L | 10-31-2013 |