Abstract:
A semiconductor device includes a semiconductor layer stack 13 formed on a substrate 11 and having a channel region, a first electrode 16A and a second electrode 16B formed spaced apart from each other on the semiconductor layer stack 13, a first gate electrode 18A formed between the first electrode 16A and the second electrode 16B, and a second gate electrode 18B formed between the first gate electrode 18A and the second electrode 16B. A first control layer 19A having a p-type conductivity is formed between the semiconductor layer stack 13 and the first gate electrode 18A.
Abstract:
A bidirectional switch includes a field-effect transistor having a first ohmic electrode, a second ohmic electrode and a gate electrode, and a control circuit for controlling between a conduction state and a cut-off state by applying a bias voltage to the gate electrode. The control circuit applies the bias voltage from the first ohmic electrode as a reference when a potential of the second ohmic electrode is higher than the potential of the first ohmic electrode, and applies the bias voltage from the second ohmic electrode as a reference when the potential of the second electrode is lower than the potential of the first ohmic electrode.
Abstract:
A liquid crystal display device in which light from a light source enters a liquid crystal panel and exits therefrom for projection of an image and includes a heat conducting member and a cooling unit. The heat conducting member is contacted with at least one of a light incident surface and a light outgoing surface of the liquid crystal panel, is light-transmissive, and has a larger area than a light transmitting area of the liquid crystal panel. The cooling jacket, which comprises a flow channel for a cooling medium in its inside, is provided around the heat conducting member so that the flow channel exists only outside of the light transmitting area in a surface direction of the liquid crystal panel.
Abstract:
An image pickup apparatus includes: an image pickup portion for picking up a subject image to generate image data and reading out the generated one frame image data that is divided into plural fields; a storage portion for temporarily storing the image data obtained by performing predetermined processing on the image data that has been read out; and an image processing portion for generating record image data and auxiliary image data for a use other than recording, based on the image data that has been stored in the storage portion. The record image data is generated using image data of all of the fields of the one frame of the image data, and the auxiliary image data is generated using image data of a subset of the fields of the one frame of the image data. The variation of the amount of compressed data is reduced, the processing time is reduced, and the capacity requirement of the buffer memory is reduced.
Abstract:
The present invention provides a liquid crystal display device and a liquid crystal cooling unit, which are reduced in noise and have high cooling capability, and in which air is not directly blown on a liquid crystal panel module or a polarizing plate. A cooling jacket having an internal flow channel is formed by being adhered to a periphery of a light-transmissive, highly heat-conducting sapphire plate larger than a light transmitting area to which a polarizing film is applied or attached, by means of a highly heat-conducting adhesive. A liquid crystal cooling unit is formed by clamping the liquid crystal panel module by inserting a light-transmissive, highly heat-conducting substance. Further, the liquid crystal panel module and the polarizing film are cooled by circulating a cooling medium in the internal flow channel of the cooling jacket.
Abstract:
A projector having an image display element for modulating light on the basis of an image signal and a projection lens for projecting light emitted from the image display element on a screen, includes: a lamp which has a light emitting source for emitting light; a reflector which reflects light emitted from the light emitting source; a cover glass which covers an emission surface of light from the reflector; a cooling fan disposed outside the reflector; and an air direction changing unit which changes a direction of cooling air caused by the cooling fan. The air direction changing unit is disposed within a space surrounded by the reflector and the cover glass, and outside an emitted light path of light reflected by the reflector. Cooling air within the space is exhausted outside the projector through the cooling fan.
Abstract:
A film formation apparatus for plasma CVD and etching methods making use of inductive coupling plasma generators. The apparatus comprises a plurality of plasma generators for inductive coupling methods, one or more film formation gas discharge pipes, and a substrate setting table facing the plurality of plasma generators via a reaction zone. The film formation gas discharge pipes are included in each of two movable members capable of performing reciprocating motions along a substrate surface on the substrate setting table, while intersecting each other. Thereby, a plasma with a relatively high density can be uniformly created over a large area, the film formation gas excited by free radicals in the plasma can uniformly spread over the film formation target, and a film can be formed with a high deposition rate. Consequently, a large-sized substrate with a good quality of thin film can be provided.
Abstract:
A display optical unit and apparatus in which the optical axis of a projection lens is shifted from the optical axis of an illumination unit and light splitter. The projection lens is attachable and detachable in a direction in which the optical axes are shifted from each other. A light valve or a polarizer is cooled by cooling winds blown by a cooling device to the light valve or polarizer through a plurality of wind supply openings are arranged in directions different from one another and within the range of 45 degrees to 315 degrees so as to enable cooling of the display optical unit.
Abstract:
An active matrix display device comprising an integrated peripheral driver circuit improved in image quality, provided in such a constitution that the feed through voltage &Dgr;Vs is set lower than the voltage Vgr necessary for realizing a single gradation. In this manner, a stable gradation display is obtained without being influenced by the feed through voltage &Dgr;Vs even when the fluctuation in the characteristics of the thin-film transistors provided in active matrix circuit may fluctuate the &Dgr;Vs.
Abstract:
In an active matrix type liquid-crystal display device, in a peripheral circuit portion, there is arranged a TFT having a high mobility and capable of allowing a large amount of on-state current to flow. In a pixel portion, there is arranged a TFT having a small off-state current. These TFTs having different characteristics are constituted by using crystalline silicon film whose crystal has grown in a direction parallel with a substrate. That is, an angle formed between a crystal growing direction and a carrier moving direction are made different from each other, thereby to control a resistance imposed on the carriers when moving to determine the characteristics of the TFT. For example, when the crystal growing direction coincides with the carrier moving direction, high mobility can be given to the carriers. Further, when the crystal growing direction is arranged perpendicular to the carrier moving direction, the off-state current can be lowered.