Other

Hitachi, Ltd.

Panasonic Liquid Crystal Display Co., Ltd.

Hitachi Displays, Ltd.

Hitachi Device Engineering Co., Ltd.

Hitachi Electronic Devices Co., Ltd.

Atsushi Tsuruoka

Masayoshi Misono

Satoru Miyamoto

Hisao Nakamura

Yasuhisa Shiraishi

Shigeki Nishizawa

Sakae Ishii

Akiyoshi Tobe

Toshihiro Yajima

A light guide plate is for reflecting incident light from an end surface thereof in an inside to obtain surface emission from a front surface thereof. The light guide plate includes protrusions and recesses formed on one of the front surface and a rear surface on an opposite side of the front surface. The protrusions and recesses are formed of a shape in which first mountain-range shapes each including a first ridge continuing along a first direction, which is a direction toward the inside from the end surface, and second mountain-range shapes each including a second ridge continuing along a second direction intersecting with the first direction are combined. Each first mountain-range shape includes a pair of first side surfaces on both sides of the first ridge. Each second mountain-range shape includes a pair of second side surfaces on both sides of the second ridge.

Liquid crystal display device using light guide plate

A liquid crystal display device which can make the surface brightness of an edge-light-type backlight uniform is provided. The liquid crystal display device includes a liquid crystal display panel and a backlight which radiates light to the liquid crystal display panel. The backlight includes a light guide plate which is arranged on a back side of the liquid crystal display panel, a light source arranged on an outer peripheral portion of a first main surface of the light guide plate which faces the liquid crystal display panel in an opposed manner, and a reflection sheet which is arranged on a back side of the light guide plate as viewed from the liquid crystal display panel. The light guide plate is made of a transparent resin having a refractive index of 1.53 or less. On a surface of the light guide plate opposite to the first main surface, a second main surface which is substantially parallel to the first main surface and a plurality of inclined surfaces which are inclined at a preset angle with respect to the second main surface are formed. An angle of the inclined surface positioned near a position at which light from the light source is incident and an angle of the inclined surface positioned remote from the position at which the light from the light source from the light source is incident differ from each other.

Liquid crystal display device

A cathode ray tube includes an electron gun having plural focus electrodes and an anode in its neck portion, a voltage-dividing resistor for producing an intermediate voltage applied to a first one of the focus electrodes adjacent to the anode by dividing an anode voltage, a metal conductor attached to a second one of the focus electrodes to surround the voltage-dividing resistor, and a metal film on an insulating substrate of the voltage-dividing resistor between the metal conductor and an intermediate-voltage terminal of the voltage-dividing resistor. The second one of the focus electrodes is disposed upstream of the first one of the focus electrodes, and the metal film extends at least 1 mm axially and is spaced at least 1 mm from the metal conductor.

Cathode ray tube having an internal voltage-dividing resistor

A cathode ray tube includes an evacuated envelope having a panel portion having a phosphor screen, a neck portion and a funnel portion connecting the panel portion and the neck portion; an electron gun housed in the neck portion having a cathode, a first grid electrode, a second grid electrode, plural focus electrodes and an anode arranged in the order named and fixed in predetermined axially spaced relationship by two glass beads; a voltage-dividing resistor attached to one of the two glass beads for producing an intermediate voltage to be applied to a first one of the plural focus electrodes adjacent to the anode by dividing a voltage applied to the anode; and a metal conductor facing and attached to a second one of the plural focus electrodes to surround the voltage-dividing resistor and the one of the two glass beads, the second one of the plural focus electrodes being disposed upstream of the first one of the plural focus electrodes. The voltage-dividing resistor includes a first overcoat insulating film, a resistance element, an insulating substrate and a second overcoat insulating film stacked in the order named from the first overcoat insulating film facing the one of the two glass beads, and a portion of the second overcoat insulating film containing a region thereof facing the metal conductor is made locally thicker than a remainder of the second overcoat insulating film.

A color cathode ray tube is provided with an electron gun having a voltage-dividing resistor having a stable and good voltage supplying function. The voltage-dividing resistor has an insulating substrate on which a resistor pattern and a terminal-connecting conductive film are formed, and a terminal having a first flange portion, a connecting portion, a tubular portion and a second flange portion. The first flange portion partly has a convex portion for electrical connection to the terminal-connecting conductive film, and the second flange portion is doubled. This construction provides reliable electrical connection between the terminal and the terminal-connecting conductive film.

Cathode ray tube

A cathode ray tube includes an evacuated envelope having a panel portion carrying a phosphor screen, a neck portion housing an electron gun and a funnel portion for connecting the panel portion and neck portion, the electron gun housed in the neck portion and a deflection device mounted in a transition region between the funnel portion and neck portion. The electron gun is provided with an electrode having a single opening common to the three electron beams and having correction electrodes disposed in vicinities of both edges of the single opening in the inline direction and extending substantially parallel with a cathode ray tube axis into a region downstream of an end surface of an anode electrode forming a main lens on a cathode side thereof and provided with electric field produced by the main lens, and the electrode having the single opening is electrically connected to the anode electrode.

Cathode ray tube having improved beam convergence

A color cathode ray tube includes a vacuum envelope including a panel portion, a neck portion accommodating an electron gun, and a funnel portion connecting the panel portion and the neck portion, and aperture electrodes having apertures for passing center and side electron beams, respectively, located in a main lens electrode including two opposing cylindrical electrodes having racetrack-shaped sections. At least one of the apertures is not circular. The apertures of at least one aperture electrode for the center electron beam and for the side electron beams are displaced with respect to each other to provide a step in the direction in which the electron beams pass.

Color cathode ray tube with improved main lens

In an electron gun wherein an electric field which is established between the axially opposed parts of a pair of electrodes forming a main lens has a rotationally-asymmetric distribution; electric-field correcting plates (54, 65 in FIG. 1B) are provided in the respective electrodes (5, 6) so as to render a lens action on electron beams substantially rotationally symmetric. The electron beams form smaller spots on the fluorescent screen of a cathode-ray tube than in the prior art.

Growing community of inventors

Mobara, Japan

Atsushi Tsuruoka