An object is to provide a semiconductor device of which a manufacturing process is not complicated and by which cost can be suppressed, by forming a thin film transistor using an oxide semiconductor film typified by zinc oxide, and a manufacturing method thereof. For the semiconductor device, a gate electrode is formed over a substrate; a gate insulating film is formed covering the gate electrode; an oxide semiconductor film is formed over the gate insulating film; and a first conductive film and a second conductive film are formed over the oxide semiconductor film. The oxide semiconductor film has at least a crystallized region in a channel region.

Semiconductor device, and manufacturing method thereof

A light source device includes: a light emitting plate that has a plurality of segment regions including a transmissive portion that transmits light and a reflective portion on which a fluorescent substance layer; a light source that irradiates the fluorescent substance layer of the light emitting plate with the excitation light; a dichroic mirror that is disposed between the light source and the light emitting plate to transmit the excitation light and reflect fluorescent light from fluorescent substances of the fluorescent substance layer; and an optical device that condenses the excitation light transmitted by the transmissive portion of the light emitting plate and the fluorescent light reflected by the dichroic mirror on a single optical path to form a condensed light and radiate the condensed light toward the same direction.

Light source device and projector

By doping an organic compound functioning as an electron donor (hereinafter referred to as donor molecules) into an organic compound layer contacting a cathode, donor levels can be formed between respective LUMO (lowest unoccupied molecular orbital) levels between the cathode and the organic compound layer, and therefore electrons can be injected from the cathode, and transmission of the injected electrons can be performed with good efficiency. Further, there are no problems such as excessive energy loss, deterioration of the organic compound layer itself, and the like accompanying electron movement, and therefore an increase in the electron injecting characteristics and a decrease in the driver voltage can both be achieved without depending on the work function of the cathode material.

Light Emitting Device

A backlight assembly includes a light source unit, a reflective element, a receiving container and a diffusion plate. The light source unit has at least one point light source, and the point light source emits light toward a side surface direction. The reflective element has a reflective surface, and the reflective surface is separated from the point light source toward the side surface direction by a predetermined distance for reflecting the light from the point light source toward an upper direction. The receiving container has a bottom plate and a side wall, for receiving the light source unit and the reflective element. A diffusion plate is disposed over the light source unit and the reflective element. Thus, uniform brightness may be enhanced, and the thickness of a display apparatus may be reduced.

Backlight assembly and display apparatus having the same

A fluorescent light tube retrofit with light emitting diodes (LEDs) that evenly distribute light to avoid bright spots is disclosed. One tube in the form of a conventional fluorescent tube includes two LEDs mounted to the tube on opposite sides of a single circumference of the tube. The LEDs can face the center of the tube, or the LEDs can be offset facing relative to the center of the tube. A reflecting surface can be disposed inside the tube to reflect light evenly toward an arc of the tube. Alternatively, at least one LED can be oriented to direct light into a light pipe that curves around the interior of the tube.

Light distribution using a light emitting diode assembly

An object is to obtain a planar light source which is free from brightness variations or chromaticity variations by using a point light source having a high directivity for emitted light, and another object is to provide a liquid crystal display device capable of obtaining superior display characteristics by using this planar light source device. A planar light source device having an opening in the upper surface comprises a hollow box, a diffusion plate disposed in the opening, a reflecting plate disposed on the bottom of the hollow region of the box, and a plurality of point light sources disposed in a row along at least one side surface of the box. This planar light source device is characterized by including a refracting element disposed parallel to the row of point light sources and between the point light sources and the hollow region for refracting the light from the point light sources, whereby the light at an incident angle at which the brightness is greatest in the luminous intensity distribution of the light radiated to the irradiation subject surface of the refracting element is refracted to the bottom surface of the box by the refracting element.

Planar light source device and display device using the same

To obtain a planar light source which is free from brightness variations or chromaticity variations by using a point light source having a high directivity for emitted light, and to provide a liquid crystal display device capable of obtaining superior display characteristics by using this planar light source device. A planar light source device having an opening in the upper surface comprises a hollow box, a diffusion plate disposed in the opening, a reflecting plate disposed on the bottom of the hollow region of the box, and a plurality of point light sources disposed in a row along at least one side surface of the box. This planar light sources device is characterized by including a refracting element disposed parallel to the row of point light sources and between the point light sources and the hollow region for refracting the light from the point light sources, whereby the light at an incident angle at which the brightness is greatest in the luminous intensity distribution of the light radiated to the irradiation subject surface of the refracting element is refracted to the bottom surface of the box by the refracting element.

Planar light source device and display device using the same device

The goal of the invention targets at no illumination change and color quality change from using the point light source with high directive irradiating light and the LCD device capable of acquiring superior display characteristics by using the same. A area light device comprises the frame with hollow area and opening atop, the scatter installed at the opening, the reflector installed on the bottom of the hollow area of the frame, and a plurality of point lights installed along at least one side row of the frame, and is characterized by the refractive component located between the point lights and the hollow area and installed in parallel with the installed multiple rows of point lights so that the emitting light of the point lights is refracted and the luminosity in light distribution of the irradiating light of the irradiated surface of the refractive component is set up in a way that the light with the maximum incident angle is refracted to the bottom side of the frame.

Takashi Yamaguchi

Papers

Planar light source device and display device using the same

Planar light source device and display device using the same device

Area light device and display device using the device