Abstract: A work table is provided for mounting a PCB substrate. A cutting tool for cutting the PCB substrates a pin dispenser for inserting a pin into a hole formed in the PCB substrate, and a solder applicator for applying solder on the PCB substrate are attached on a work head. X, Y and Z axes driving means are provided for moving the work head in a horizontal direction and in a vertical direction. A control unit responds to data signals for operating the cutting tool, pin dispenser and solder applicator for controlling operations of the X, Y and Z axes driving means, cutting tool, pin dispenser, and solder applicator. Thus, the PCB substrate is made into a printed circuit board.

Abstract: A printed circuit board working machine includes a working table on which a printed circuit board substrate is positioned and fixed, a spindle which is disposed above the working table to be movable horizontally and vertically and to which a predetermined cutting tool is detachably mounted, a controlling unit for controlling the movement of the spindle in accordance with a predetermined cutting data and a data processing unit operatively connected to the controlling unit.

Abstract: A liquid crystal projector projects an image based on video data inputted from the external.

Abstract: A cooling device has a container filled with a coolant. A front side and a rear side of the container are transparent. A heatsink is provided for cooling the container. A liquid crystal panel is attached to one of the sides. Convection enhancing means is provided for enchancing convection of the coolant in the container.

Abstract: Illuminating light from a light source is reflected by a reflector and collimated by a condenser lens and then applied onto the back of a liquid crystal cell. The liquid crystall cell has attached on its light source side an optical sheet which consists of a large number of optical elements such as convex or concave lenses aligned with picture elements or pixels of the liquid crystal cell. The optical elements each converge the rays of light from the light source onto each of the pixels, so that the rays that would otherwise strike a matrix circuit section and a black matrix layer will be focused on and passed through the pixels. This enhances the brightness of an image formed on the front of the liquid crystal cell and also prevents temperature rise in the liquid crystal cell because the black matrix layer and the matrix circuit section, components of the liquid crystal cell, are not struck and heated by the incoming light rays.

Abstract: A coupler contains cooling liquid between the front face of a projection tube and a lens that forms the screen of a projection television receiver. The coupler has a multiplicity of large and small fins extending into the cooling liquid and parallel to the center line of the tube to dissipate heat. The fins are closely spaced from each other.