Abstract:
A color filter (19) is provided to be used in a transmissive color liquid crystal display panel of a color liquid crystal display. The color filter (19) is composed of a three-primary-color filter which selectively transmits red light, green light and blue light by wavelength, and prevents color mixing by preventing the transmitting wavelength range of a red color filter (CFR) from substantially overlapping that of a blue color filter (CFB).
Abstract:
There is provided a backlight device used in a color liquid crystal display device (LCD). The backlight device generates white light by mixing red light, green light, and blue light generated from a light source including a red color light emitting diode (21R) emitting red color light having a half value width hwr: 15 nm ≤ hwr ≤ 30 nm, a green color light emitting diode (21G) emitting green color light having a half value width hwg: 25 nm ≤ hwg ≤ 50 nm, and a blue color light emitting diode (21B) emitting blue color light having a half value width hwb: 15 nm ≤ hwb ≤ 30 nm. The white color light is applied from the rear side of a transmittance type color liquid crystal display panel (10) including a color filter (19) having three primary color filters for wavelength-selectively transmitting red color light, green color light, and blue color light.
Abstract:
A backlight device for illuminating a transmission color liquid crystal display panel with white light from the back side comprising, as a light source, a plurality of main light emitting diode units 21mn (m, n are natural numbers) consisting of a plurality of light emitting diodes (21) arranged in columns and emitting white light with a predetermined chromaticity, and sub-light emitting diode units 21mn, smaller in number than the main light emitting diode units 21mn, consisting of a plurality of light emitting diodes (21) arranged in columns and emitting white light with chromaticity in the vicinity of the predetermined chromaticity. When the sub-light emitting diode units 21mn are arranged in two-dimensional matrix, they are not arranged side by side on the same row, and the sub-light emitting diode units 21mn being arranged in the central column of the two-dimensional matrix are arranged on the central side of a color liquid crystal display panel (110).
Abstract:
PURPOSE:To obtain an electron gun, in which a large bore of an electron lens is provided further influence to the electron lens due to a bead glass can be effectively avoided, in the neck of small diameter of a cathode-ray tube body. CONSTITUTION:After embedding external edns of supporting pins 4 and forming recessed parts 10 for protruding parts 9a of spacers 9 in bead glasses 3, the glass 3 is cooled and solidified, and then each pair of jigs 7 and supporters 11 of the glass 3 are removed, further the spacer 9 is removed in the spreading direction of its width from between a grid G3 and grid G4. In a case that the spacer 9 is constituted by superimposing three sheets of plate shaped bodies, the central plate shaped body is firstly removed and then said bodies in both sides are removed to enable the easy removal of the spacer 9. In this way, an electron gun, in which each electrode G1-G4 is supported by paired bead glasses 3 and the parts 10 are provided in an area located at a face-to-face position between electrodes constituting a main electron lens of each bead glass 3, that is, between the 3rd grid G3 and the 4th grid G4, is constituted.
Abstract:
PURPOSE:To prevent the deterioration of cathode image without the use of any special facility by supplying power only to the heater of an electron gun cathode until the degree of vacuum drops to or below the predetermined value in a cathode-ray tube, and then activating the cathode with current. CONSTITUTION:At an aging process, current activity begins 50 minutes after the start of power supply to a heater 9 in a cathode 8, and activation with current ends in 70 minutes thereafter, as shown in the schedule. This schedule is because the deterioration of the cathode 8 due to ion bombardment does not appear, when the degree of vacuum is equal to or below 9X10 Torr at the start of the current activity. In addition, such a vacuum degree can be generated by supplying power at least for 50 minutes or longer, even when exhaust temperature is as low as 270 deg.C. Also, current activity causes the cathode 8 to be grounded, and applies the predetermined voltage (V1=+10V, V2=+200V) to the first and second grids G1 and G2. Electrons are thereby emitted from the surface of the cathode 8 to activate the surface thereof.
Abstract:
PURPOSE:To stably obtain an electron beam with high current density and enable changes in the cut-off voltage occurring with the passing of time to be reduced by adjusting the diameter of the electron-beam-admitting hole of the first grid electrode, the thickness of the plate section of the first grid electrode and the distance between the electron-emitting surface and the plate section of the first grid electrode according to a specific formula. CONSTITUTION:An electron gun structure has an impregnated cathode (K) and a grid electrode group including a first grid electrode (G1) which has an electron-beam-admitting hole (O1) and a plate section facing the electron-emitting surface of the impregnated cathode (K). The diameter (D1) of the hole (O1) in the plate section of the first grid electrode (G1), the thickness (T) of the above plate section and the distance (S) between the electron-emitting surface of the impregnated cathode (K) and the plate section of the first grid electrode (G1) are adjusted according to the formula 0.855XD1 XT -2.0 XT +2.0. As a result, changes in the cathode cut-off voltage of the electron gun structure occurring with the passing of time are restricted to, for example, 5% or below.
Abstract:
PROBLEM TO BE SOLVED: To provide a high-pressure discharge lamp capable of lowering a lamp current even if mercury is not used, and of optimizing a light emission spectrum of the discharge lamp to match the balance of light after passing through a liquid crystal device. SOLUTION: The high-pressure lamp is provided with a fire-resistant and transparent airtight vessel and electrodes sealed to the airtight vessel, and is filled with light-emitting materials and a rare gas. The high-pressure discharge lamp is structured such that one or more kinds of halides selected from dysprosium halide, thulium halide, yttrium halide, holmium halide, ruthenium halide, erbium halide and terbium halide, and a second halide having vapor pressure higher than that of the first halide are added as the light-emitting materials; and the rare gas is filled at a pressure of 15 to 30 atmospheres. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PURPOSE:To prevent the damage to a cathode and provide a good cathode characteristic without using a special facility and without increasing the exhaust temperature by dispensing with current activation during the aging process. CONSTITUTION:The heater of a cathode 8 is heated only by excitation during the aging process of the cathode 8, and no current activation is performed. During exhaust or electron gun sealing/getter flash processes after the disassembly/activation of the cathode 8, the cleaning of the surface of the cathode 8 is not required if the surface of the cathode 8 is not re-polluted by the residual gas in a tube. No current activation is required when an electron beam is squeezed and fed to a fluorescent screen from the through hole of an electron gun electrode like in a cathode-ray tube. Aging is performed only by heater excitation with no current activation, and the damage to the cathode 8 is prevented and a good cathode characteristic can be obtained without increasing the exhaust temperature.
Abstract:
PROBLEM TO BE SOLVED: To allow to reduce deterioration in the lifetime due to defection of electron emission materials even when a thermionic cathode fluorescent tube is used as a backlight. SOLUTION: A thermionic cathode fluorescent tube 3 that is used as a backlight for a liquid crystal panel comprises a thermionic cathode filament 11 of a double helical structure, a cylindrical sleeve 12 covering the whole thermionic cathode filament 11, a sleeve tab 13 that fixes a front edge of the thermionic cathode filament 11 and one end of the sleeve 12, while assuring the conduction between the fixed edge and the one end, and a pair of electrode leads 14 for applying the voltage across a two-footed part of the thermionic cathode filament 11 and for applying the voltage across the front edge of the thermionic cathode filament 11 through the sleeve 12 and the sleeve tab 13. COPYRIGHT: (C)2010,JPO&INPIT