Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
  • H01J61/00—Gas-discharge or vapour-discharge lamps
  • H01J61/92—Lamps with more than one main discharge path
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
  • H05B41/14—Circuit arrangements
  • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
• • G—PHYSICS
  • G02—OPTICS
  • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
  • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
  • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
  • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
  • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
  • G02F1/1333—Constructional arrangements; Manufacturing methods
  • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
  • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
  • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
  • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
  • G09G3/3406—Control of illumination source
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
  • H01J61/00—Gas-discharge or vapour-discharge lamps
  • H01J61/02—Details
  • H01J61/30—Vessels; Containers
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
  • H01J61/00—Gas-discharge or vapour-discharge lamps
  • H01J61/02—Details
  • H01J61/30—Vessels; Containers
  • H01J61/305—Flat vessels or containers
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
  • H05B41/14—Circuit arrangements
  • H05B41/36—Controlling
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
  • G09G2310/00—Command of the display device
  • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
  • G09G2310/0237—Switching ON and OFF the backlight within one frame
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
  • G09G2320/00—Control of display operating conditions
  • G09G2320/02—Improving the quality of display appearance
  • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes

Definitions

• the present invention relates to a flat fluorescent lamp for a backlight, which is mounted on a back surface of a liquid crystal display and irradiates the back surface of the liquid crystal display to generate luminance on a display surface of the liquid crystal display that does not emit light.
• the present invention relates to a light lamp, and more particularly, to a method of lighting a flat fluorescent lamp for a large backlight for a large liquid crystal television or the like.
• Patent Document 1 # 112003-436375
• Patent Document 2 Japanese Patent Application No. 2003-428313
• Patent Document 3 Japanese Patent Application No. 2003-420114
• the problem to be solved by the present invention is that a plurality of rows of glass substrate reinforcing grooves are formed in parallel in a range excluding a welded portion on the outer periphery and a portion for attaching a member such as a cylindrical electrode, and a welded portion on the inner surface is formed.
• the rectangular front glass substrate on which the phosphor coating is formed and the rear glass substrate are overlapped with each other, and the outer peripheral portion is welded to the outside of the lamp frame by sandwiching the glass frame in which the exhaust pipe and other members are sealed in advance.
• the exhaust pipe is sealed to the glass frame on the upper side of the installation, and a plurality of sets of cylindrical electric A flat surface with a structure in which the lighting lead wires with the welded poles are sealed so as to face each other, and a heater lead wire in which a heater wire is connected via a leaf spring to the lower glass frame of the installation.
• discharge interference disurbance of fluorescent discharge
• the flat fluorescent lamp described above is lit by applying an AC voltage to a plurality of sets of cylindrical electrodes through a lighting introduction line using a lighting device.
• One or two sets of cylindrical electrodes are set so that one or two sets of cylindrical electrodes adjacent to the set of lit cylindrical electrodes are always turned off, and an AC voltage is applied.
• time-division lighting is used to sequentially switch the set of electrodes and the set of cylindrical electrodes to which no AC voltage is applied, at a speed that does not cause flickering of lighting. This is to prevent the occurrence and solve the problem.
• FIG. 1 is an explanatory view showing an embodiment of a lighting method of a flat fluorescent lamp according to the present invention.
• a groove (not shown) for reinforcing a glass substrate is parallel to a region excluding a welded portion on an outer periphery and a portion where a member such as a cylindrical electrode is attached.
• a rectangular front glass substrate 1 and a rear glass substrate 2 on which a phosphor coating (not shown) is formed in a range excluding the welded portion on the inner surface side are overlapped with each other, and the exhaust pipe and other members are previously formed.
• the outer peripheral portion is welded to sandwich the sealed glass frame 3 to form a lamp envelope.When the lamp envelope is installed upright, the exhaust pipe 4 is sealed to the glass frame 3 on the upper side of the installation.
• a plurality of sets of cylindrical electrodes 6 are welded to the opposing glass frame 3 on the opposite side of the glass frame 3 and the lighting lead-in 5 is sealed so as to oppose the heater glass 8 to the lower glass frame 3 on the installation side.
• a flat fluorescent lamp with a structure in which the heater lead-in wire 7 connected via a spring 9 is sealed is sealed. Then, the lighting device 10 is lit by applying an AC voltage to the plurality of sets of cylindrical electrodes 6 through the lighting lead-in line 5, and the set of cylindrical electrodes for applying the AC voltage is set to one set or two sets.
• One or two sets of cylindrical electrodes adjacent to the set of cylindrical electrodes in the normal state are always turned off, and a set of cylindrical electrodes capable of reducing AC voltage and a set of cylindrical electrodes capable of reducing AC voltage are not provided.
• time-division lighting in which the lighting is sequentially switched at a speed that does not cause flickering.
• the frequency of the AC voltage for lighting is usually around 50 kilohertz, and among them, a time-division lighting that switches on and off sequentially at a short interval of, for example, approximately 100 Hz, is used as a flat fluorescent lamp. Does not cause a flicker in the luminance of the liquid crystal display surface, which is a problem for liquid crystal backlights.
• a lighting device 10 shown in FIG. 1 shows an embodiment of a lighting method of a flat fluorescent lamp according to the present invention, and includes a built-in lighting AC voltage generating circuit and a time-division lighting circuit.
• an AC voltage is applied to a plurality of sets of cylindrical electrodes 6 through a lighting introduction line 5 of a flat fluorescent lamp so as to form a time-division lighting.
• the lighting device 10 uses a time-division lighting circuit to set every other set of cylindrical electrodes capable of controlling the AC voltage so that one set of cylindrical electrodes adjacent to the set of turned-on cylindrical electrodes is always turned off.
• the lighting method of the flat fluorescent lamp according to the present invention can be commercialized as a lighting device, it is considered that it will be greatly used together with the flat fluorescent lamp.

Landscapes

• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• General Physics & Mathematics (AREA)
• Theoretical Computer Science (AREA)
• Computer Hardware Design (AREA)
• Nonlinear Science (AREA)
• Crystallography & Structural Chemistry (AREA)
• Optics & Photonics (AREA)
• Chemical & Material Sciences (AREA)
• Mathematical Physics (AREA)
• Vessels And Coating Films For Discharge Lamps (AREA)
• Planar Illumination Modules (AREA)
• Liquid Crystal (AREA)
• Discharge Lamps And Accessories Thereof (AREA)
• Circuit Arrangements For Discharge Lamps (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34805961

Family Applications (1)

Country Status (4)

Cited By (1)

Families Citing this family (1)

Citations (2)

Family Cites Families (16)

• 2004
  • 2004-01-26 JP JP2004047085A patent/JP4545453B2/ja not_active Expired - Lifetime
• 2005
  • 2005-01-26 US US10/550,739 patent/US7683547B2/en not_active Expired - Lifetime
  • 2005-01-26 WO PCT/JP2005/001004 patent/WO2005072022A1/ja not_active Ceased
  • 2005-01-26 KR KR1020057013761A patent/KR101085127B1/ko not_active Expired - Lifetime

Patent Citations (2)

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