Abstract: For dissolving ununiformity in the brightness of a projection image within a display image apparatus, obtaining an enlarged projection image through an oblique projection of image lights onto a rear-surface projection type screen, wherein an image from an image generating source 1 is projected through a projection optical system, having a projection lens 2, curved surface reflection mirrors 4 and 5, a reflection mirror 6, from a rear surface of the rear-surface projection type screen 3, within a housing 7 being narrow in depth thereof; the rear-surface projection type screen includes a Fresnel lens sheet 8, wherein the prism surfaces of the Fresnel lens making up the Fresnel lens sheet are formed in an aspheric configuration, thereby letting the light beams from the screen to exit at an exit angle of about zero (0) degree, almost all over the entire surface thereof.

Abstract: The present invention provides a technique suitable for making a set more compact by realizing reduction in height and reduction in depth. An image display apparatus of the present invention includes a reflecting mirror (4) for reflecting the image sent from a projection lens (2), and guiding the image to a transmissive screen (3). The reflecting-mirror (4) includes a planar mirror section (4a) for reflecting, of the entire image exiting the projection lens (2), only image portions projected onto the upper section of the transmissive screen (3), and a Fresnel mirror section (4b) with multiple reflective prisms for reflecting only image portions projected onto the lower section of the screen (3).

Abstract: The present invention provides a flat image display device having a support frame that is compatible with a large flat image display device and has a high bonding strength. The invention relates to a flat image display device including: a display substrate; a back substrate disposed opposite the display substrate with a specified clearance therebetween; and a frame glass disposed around the back substrate and the display substrate, for supporting the substrates with the specified clearance therebetween. The invention is characterized in that the frame glass includes frame glasses whose ends each have at least two steps and the stepped ends are in engagement with each other and bonded together.

Abstract: In order to obtain an image display device with ease and high reliability in which a space between a display panel and a rear panel opposite thereto is sealed with a frame spacer, in the present invention, a step is formed by partially cutting at least one inner wall of ends connected to each other of a plurality of glass members constituting the frame spacer, or the glass members are connected through a metal fitting which is inserted between ends connected to each other of the glass members.

Abstract: In an FED (Field Emission Display), lowering of a color temperature is suppressed which is caused by that light emission luminance of respective color phosphors is different from each other so as to achieve a better white balance. A display apparatus is equipped with a cathode substrate containing a plurality of electron emitter elements, and an anode substrate. The anode substrate is arranged opposite to the cathode substrate, and contains three colors of red, green, blue phosphors which are excited by electrons emitted from the electron emitter elements so as to emit light. Then, an area of either the red phosphor or an area of the blue phosphor is made smaller than an area of the green phosphor.

Abstract: This invention provides a flat-panel display apparatus adapted to reduce the electric charges stored into fluorescent materials, and to allow spacers to be arranged easily and accurately, and capable of displaying high-quality images by improving color purity of the colored light emitted toward the viewing side. The display apparatus according to this invention has a rear substrate 1 including an electrical insulating substrate 10 on which are formed a large number of cold-cathode elements 19 for emitting electrons, a display substrate 101 including a light-transmissive substrate 110 which is disposed facing the rear substrate 1 and on which are formed the fluorescent materials 111 that emit light when excited by the electron beams sent from the cold-cathode elements 19, and a frame member 116.

Abstract: Images that are bright even on the periphery of a transmissive screen are obtained by reducing reflection loss of the screen when the screen incident angle of the image light entering the upper left and right ends of the screen increases. Incident-side prisms (10), each having at least a plane-of-incidence (c) onto which light comes in, an exit face (d) from which the light that has come in from the plane-of-incidence exits after being refracted, and a refractive face (e) on which the light that has exited from the exit face is refracted and then guided to the image-viewing side of the Fresnel lens sheet (6), are provided in the range where the incident angle of the incoming light becomes equal to or greater than approximately 40 degrees.

Abstract: The present invention provides a screen suitable for reducing the longitudinal dimension of a set. The present invention includes two prism sections. One is a totally reflective prism section (10) provided at the image generation source side of a Fresnel lens sheet (6). The other is a refractive prism section (11) provided at the image-watching side of the Fresnel lens sheet. The refractive prism section (11) includes a refractive face (e) for refracting incident light and making the light exit toward the image-watching side, a plane (f) approximately parallel to the principal plane of the Fresnel lens sheet, and a connection face (g) for continuously forming the face (e) and the plane (f).

Abstract: A flat panel display apparatus includes a rear substrate in which a number of cold cathode devices for emitting electrons are formed on an insulative substrate; a display substrate in which phosphors are arranged in a matrix shape on a translucent substrate; supporting members which are arranged between the rear substrate and the display substrate and maintain intervals between them; and frame members, in which a space surrounded by the rear substrate, the display substrate, and the frame members is set to a vacuum atmosphere. It then becomes possible to provide an apparatus in which there is no remarkable change between a scanning line resistance value in the scanning line direction in a portion with spacers and that in a portion without a spacer, a luminance variation can be reduced, and the apparatus has a conduction connection structure of the spacers and the scanning lines.

Abstract: The present invention provides a technology that makes it possible to display high-quality images by reducing a reflection loss of the image light entering the upper left and right ends of a transmissive screen. At the image generation source side of the Fresnel lens sheet, a totally reflective prism section (10) is provided that totally reflects incident rays of light and causes the light to exit toward the image-watching side. At the image-watching side of the Fresnel lens sheet (6), a refractive prism section (11) is also provided that refracts the light entering from the totally reflective prism section (10) and causes the light to exit toward the image-watching side. The refractive prism section (11) has a roughed refractive face.

Abstract: A projection-type display apparatus is improved in contrast by an overlap between a band of light to be cut off by a notch filter and a band of light wavelengths to which the polarization converting efficiencies of first and second specific-wavelength converter elements are 50%, respectively.

Abstract: Image disturbance called speckle noise occurs when an image generator has a small effective screen size and a projection lens has a small effective diameter. The present invention is intended to reduce speckle noise. In an optical projector, a viewing angle enlarging ember (60) for enlarging viewing angle or a scattering member (28) for scattering image light is disposed near an image display. device (18), such as a liquid crystal panel. Speckle noise can be reduced, suppressing the deterioration of resolution and contrast.

Abstract: A flat type display device is provided which is capable of accurately and easily assembling a spacer when arranging the spacer while reducing the danger of damaging the metal back. In the display device, a plurality of fine holes each having a fluorescent materials are formed on a light transparency substrate and a metal sheet is arranged by a black oxide film formed on the surface of the light transparency substrate side so as to obtain a light absorbing layer. A plurality of concave portions are provided on a surface of the metal sheet of the rear substrate side. A metal back having an openings corresponding to predetermined areas containing each of the concave portions is superimposed on the metal sheet, thereby constituting an acceleration electrode of two-layer structure. The spacer is inserted into the concave portion on the metal sheet exposed in the opening of the metal back.

Abstract: A total reflecting prism portion is formed on an image generation source side of a Fresnel lens sheet which constitutes a rear projection type screen. The total reflecting prism portion is formed in an area in which the angle of incidence of a projection image projected from an optical part on the Fresnel lens sheet is at least about 40°. The total reflecting prism portion causes incident light to be outputted as output light at a predetermined output angle by a total reflection phenomenon after a first refraction phenomenon. A refracting prism portion is formed on an image monitoring side of the Fresnel lens sheet. The refracting prism portion is formed in an area opposed to the portion where the total reflecting prism portion is not formed. The refracting prism portion causes incident light to be outputted as output light at a predetermined output angle by a second refraction phenomenon.

Abstract: A back substrate has a plurality of electron emission elements. A display substrate comprises an optically transparent substrate disposed opposite to the back substrate; an accelerating electrode formed on the inner face of the optically transparent substrate for accelerating electron beams emitted from the electron emission elements; and luminescent materials excited by the electron beams to emit light toward the outer face of the optically transparent substrate. A frame member supports the back substrate and display substrate on their peripheries. A vacuum chamber is defined by the back substrate, display substrate, and frame member. A conductor electrically connected to the accelerating electrode is drawn out to the outside of the vacuum chamber. A high voltage connector for supplying an accelerating voltage to the conductor is removably connected to the conductor.

Abstract: The present invention provides a bright and high-resolution display apparatus having a dynamic range exceeding the number of gray-scale voltage (or current) outputs, which a signal driver is capable of generating. In accordance with the present invention, a select period, in which a group of pixels on each row is driven, is divided into a plurality of sub-periods. The signal driver supplies a voltage output varying from sub-period to sub-period to selected pixels through a signal electrode. The pixel is capable of expressing various values of a gray scale, the size of which is at least approximately equal to (the number of gray-scale voltage outputs, which the signal driver is capable of generating)×(the number of sub-periods). By changing the ratio of the length of a sub-period to the length of another sub-period or the range of the driving voltage (or current), the dynamic range of the display can be further increased.

Abstract: A projection type image display apparatus includes a light axis moving unit for moving a direction of a light from a light source substantially in parallel periodically at a predetermined rate, a light separating unit for separating the light from the light axis moving unit into a plurality of color light components of predetermined wavelength bands, and a radiation unit for radiating the color light components from the light separating unit on an image display device, projecting an optical image corresponding to the image signal in enlarge form.

Abstract: There is disclosed a flat panel display device capable of reducing charging of phosphors and disposing spacers easily and accurately. The flat panel display device has a rear substrate 1 including an insulating substrate 10 provided with many cold cathode elements 19 for emitting electrons, a display substrate 101 including a light-transmissive substrate 110 disposed to face the rear substrate 1, and phosphors 111 disposed on the light-transmissive substrate for generating light when excited by electron beams from the cold cathode elements 19, and a peripheral frame member 116. A space enclosed by the rear substrate 1, the display substrate 101 and the peripheral frame member 116 is made vacuum tight. Provided on the light-transmissive substrate 110 is a metal sheet 120 perforated with plural fine holes 122 arranged in a matrix configuration and having the phosphors 111 disposed therewithin to form a light-emissive region.

Abstract: A projection-type display apparatus is improved in contrast by an overlap between a band of light to be cut off by a notch filter and a band of light wavelengths to which the polarization converting efficiencies of first and second specific-wavelength converter elements are 50%, respectively.

Abstract: A projection type image display apparatus includes a light axis moving unit for moving a direction of a light from a light source substantially in parallel periodically at a predetermined rate, a light separating unit for separating the light from the light axis moving unit into a plurality of color light components of predetermined wavelength bands, and a radiation unit for radiating the color light components from the light separating unit on an image display device, projecting an optical image corresponding to the image signal in enlarge form.