The present invention provides a heterocyclic compound and an organic light-emitting device including the heterocyclic compound. The organic light-emitting devices using the heterocyclic compounds have high-efficiency, low driving voltage, high luminance and long lifespan.

Organic light-emitting device

An LED component comprising an array of LED chips mounted on a planar surface of a submount with the LED chips capable of emitting light in response to an electrical signal. The LED chips comprise respective groups emitting at different colors of light, with each of the groups interconnected in a series circuit. A lens is included over the LED chips. Other embodiments can comprise thermal spreading structures included integral to the submount and arranged to dissipate heat from the LED chips.

Solid state lighting component

To provide a semiconductor display device capable of displaying an image having clarity and a desired color, even when the speed of deterioration of an EL layer is influenced by its environment. Display pixels and sensor pixels of an EL display each have an EL element, and the sensor pixels each have a diode. The luminance of the EL elements of each in the display pixels is controlled in accordance with the amount of electric current flowing in each of the diodes.

Semiconductor display device

A backlight assembly includes a light guide plate (LGP) having a stepped portion formed at a corner of the LGP, an optical sheet disposed over the LGP and a receiving container receiving the LGP and the optical sheet. The receiving container includes a bottom plate, first through fourth sidewalls and a first LGP fixing portion. The second sidewall is adjacent to the first sidewall. The third sidewall faces the first sidewall. The fourth sidewall faces the second sidewall. The first through fourth sidewalls are extended upwardly from edge portions of the bottom plate. The first LGP fixing portion is formed at the first sidewall such that the LGP fixing portion corresponds to the stepped portion of the LGP. Therefore, a display device is easily assembled. Furthermore, a defilement that may occur during an assembling process may be reduced to enhance productivity.

Backlight assembly and display device having the same

A light emitting diode (LED) package includes a substrate, a first electrode and a second electrode embedded in the substrate and spaced from each other, an LED die mounted on a top surface of the substrate and electrically connected to the first and the second electrodes. Both the first and the second electrodes include a top face and a bottom face, with the top face and the bottom face of each of the first and the second electrodes being exposed at the top surface and a bottom surface of the substrate, respectively. The top face of the first electrode defines a first groove corresponding to a positive bonding pad (p-pad) of the LED die. The p-pad is partially inserted into the first groove. An oxidation-resistant metal coating layer is filled between an insertion portion of the p-pad and an inner surface of the first groove.

Light emitting diode package

PROBLEM TO BE SOLVED: To perform refresh of an image by refreshing an image signal at about 1 Hz frame frequency, without the occurrence of a flicker to adversely affect the display in an image display device of a memory built-in pixel system of a single-channel transistor configuration SOLUTION: A reference voltage line 108 is scanned synchronously with scanning of a scanning signal line 109; the voltage of the reference voltage line is set to be the voltage of a common electrode 120; the second transistor is set to off state during the reference voltage line is set in the common voltage for a pixel, wherein a node 125 between an image signal memory 124 and the second transistor is set in a voltage so that the second transistor becomes off, and the voltage of the image signal line is set to be high voltage level, when the voltage of the scanning signal line changes from a low voltage level to a high voltage level for the pixel, wherein the node between the image signal memory; and the second transistor is set in a voltage so that the second transistor becomes on In this pixel, the voltage of the scanning line 110 is set to be at a high level, when at least the voltage of the scanning line switches from a high level to a low level The display device, having the printed matter and ultra-high fineness display performance by a single transistor configuration and the low power consumption performance by low-frequency driving, can be realized COPYRIGHT: (C)2008,JPO&INPIT

Display device, and method of driving the same

PROBLEM TO BE SOLVED: To provide a lighting system capable of improving light extraction efficiency of a light source module using a light emitting diode as a light source, capable of improving coupling efficiency to a light guide plate as a sidelight light source, capable of having highly uniform luminance distribution, and also capable of line control with a small number of light emitting diodes, and a liquid crystal display device using the lighting system. SOLUTION: In this lighting system KI, a plurality of the light emitting diodes 124r, 124b, 124g mounted on a circuit board 123 and connected to a wiring pattern formed in the circuit board 123 are sealed by a divided or separated lens body 19, and as to the radiation angle distribution of light emitted from the lens body 19 of a plurality of the light emitting diodes 124r, 124b, 124g, light is guided to desired directions depending on the shape of the divided or separated lens body 19. COPYRIGHT: (C)2009,JPO&INPIT

Lighting system and liquid crystal display device using it

PROBLEM TO BE SOLVED: To provide a directional reflection screen capable of preventing the lowering of a reflectance when incident light from an image projecting means is made incident on the screen with a tilt in a horizontal direction. SOLUTION: As for the directional reflection screen 10 with a mated mirror group 11 constituted of plural mated mirrors, in the cutting plane which is obtained by cutting a plane crossed with the ridge lines of all the mated mirrors of the mated mirror group, the screen includes the mated mirrors where the bisector (LAB) of an acute angle(θAB) formed by one mirror surface and the other mirror surface constituting the mated mirror may intersect a perpendicular which passes through the center of the mated mirror group and which is perpendicular to a straight line linking two ridge lines of the mirrors which are placed on both closest sides of the center of the mated mirror group on an image projecting means side. Besides, as for each mated mirror of the mated mirror group, an angle formed by the bisector and the perpendicular is successively made larger as it comes closer to the both end parts from the center of the mated mirror group. COPYRIGHT: (C)2000,JPO

Directional reflection screen and an image display device

PROBLEM TO BE SOLVED: To provide a white light source unit having a high light utilization efficiency at a low cost, being thin and having a high uniformity by using a plurality of light-emitting diode chips having multicolors, a lighting system using the light source unit, and a display device using the lighting system. SOLUTION: The light source unit is constituted with the light-emitting diode chips 1, lead frames 2 and transparent sealants 3. A plurality of the light-emitting diode chips 1 having the same color are connected in series with three pairs or more of the lead frame. The light-emitting diode chips 1 having at least three different colors or more are sealed integrally with a transparent resin. COPYRIGHT: (C)2006,JPO&NCIPI

Light source unit, lighting system using it and display device using lighting system

A sealing film (30), which has both a light extraction function and a moisture absorption function that are necessary for organic light emitting diodes and the like, is composed of an organic resin film (31) wherein first particles (32) for light diffusion and second particles (33) for moisture absorption are dispersed. The first particles (32) are formed from a substance that has a higher refractive index than the organic resin film (31) and is capable of transmitting visible light (for example, ZrO 2 , BaTiO 2 , TiO 2 , ZnO x , Y 2 O 3 or Al 2 O 3 ), and the second particles (33) are formed from a substance that combines with water and is capable of transmitting visible light (for example, an alkaline earth metal oxide, an alkali metal oxide, a metal halide, a metal sulfate or a metal perchlorate).

Hironori Kaneko

Papers

Display device, and method of driving the same

Lighting system and liquid crystal display device using it

Directional reflection screen and an image display device

Light source unit, lighting system using it and display device using lighting system

Sealing film and organic light-emitting diode using the same