CN2544412Y

CN2544412Y - Cold cathode fluorescent display device

Info

Publication number: CN2544412Y
Application number: CN 01276910
Authority: CN
Inventors: 葛世潮
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-12-11
Filing date: 2001-12-11
Publication date: 2003-04-09
Anticipated expiration: 2011-12-11

Abstract

A cold cathode fluorescence display comprises a plurality of cold cathode fluorescence displaying units; every unit includes at least one cold cathode fluorescence lamp, a lucent container, and a fixed base; the electrodes at the two ends of the lamp are connected with drivers, and at least one trigger electrode is arranged outside of the lamp near at least one of the electrodes, and the trigger electrode is connected with the trigger driver, so initial electron with enough quantity can be generated near the lamp electrode, thus ensuring the lamp lightening instantaneously on the lightening signal, namely the luminescence brightness is stable in low duty cycle; therefore the utility model is characterized by instantaneous lightening, stable luminescence brightness in low duty cycle, no flash and that a higher image quality with primary colors of 8 bits or more gray scales can be acquired.

Description

The cold-cathode fluorescent display

Technical field

The utility model relates to a kind of cold-cathode gas discharge fluorescence display, is used to make super large screen displaying, shows monochrome, polychrome and panchromatic character, figure and image etc.

Background technology

The cold-cathode fluorescent display of prior art is when being used for the image demonstration, because it is relevant with initiating electron quantity in the fluorescent tube that fluorescent tube plays the bright time, and the quantity of initiating electron has randomness, thereby fluorescent tube plays bright time length instability, thereby brightness flicker shakiness when causing low duty ratio promptly is difficult to obtain the high quality graphic of stable every primary colors 8 bit gradation.

Summary of the invention

The purpose of this utility model is the deficiency that will overcome above-mentioned existence, and instantaneous of a kind of energy is bright, luminosity is stable when low duty ratio and provide, thereby can obtain the cold-cathode fluorescent display of the high quality graphic of every primary colors 8 bits or more gray scales.It is achieved by the following technical solution: it includes a plurality of cold-cathode fluorescent display units, each unit comprises at least one cathode fluorescent tube, a light transmission container, a firm banking, a driver, the output of driver links to each other with the electrode of fluorescent tube two ends, is used to light fluorescent tube; Its input links to each other with external voltage, on near the tube outer wall of described at least one electrode at least one trigger electrode is arranged, this trigger electrode links to each other with the triggering driver, be used to make near the initiating electron that sufficient amount is arranged the electrode in the fluorescent tube before drive signal is come, bright to guarantee instantaneous of fluorescent tube, a plurality of display units can a public triggering driver.

Described fluorescent tube is list or Double-spiral, " U " shape or many " U " shapes or other shapes.Described fluorescent tube (2) be identical illuminant colour or different colors, as fluorescent tubes red, blue, green three primary colors.

Described light transmission container is the shape or the face of cylinder flute profile of various bulbs, and they latter half of has the reflector, makes the fluorescent tube issued light can concentrate emission forward, to improve light utilization efficiency or to obtain the required photodistributed smooth angle of emergence.

Described trigger electrode is arranged near the tube outer wall of lamp tube electrode, or is arranged on the base of fixed lamp tube, has fixing glue to fix between trigger electrode and the fluorescent tube, and the trigger electrode of a plurality of display units can interconnect, and public one is triggered driver.

Described driver can be DC/AC converter or AC/AC converter, and the high-frequency high-voltage with the DC or the AC voltage transition of input becomes to be suitable for driving cathode fluorescent tube is used to drive fluorescent tube.

Described trigger electrode and triggering driver have constituted trigger equipment, trigger driver and can be a DC/AC or AC/AC converter, DC or AC voltage or the pulse voltage of input are transformed into high-frequency high-voltage, make trigger electrode through glass-tube and lamp tube electrode discharge, in glass-tube, produce sufficient amount near the electrode initiating electron bright with instantaneous of fluorescent tube of assurance.

Cold-cathode fluorescent display of the present utility model compared with prior art, when having can instantaneous bright, low duty ratio luminous stable, do not glimmer, can obtain the high quality graphic of every primary colors 8 bits or more gray scales.

Description of drawings

Fig. 1 is structure of the present utility model and driving method schematic diagram.

Fig. 2 is the voltage oscillogram of driving method shown in Figure 1.

Fig. 3 is the voltage oscillogram of another driving method shown in Figure 1.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in detail: Figure 1 shows that the structure of an embodiment of the present utility model and the schematic diagram of driving method.1, one display of two cold-cathode fluorescent display units that only draws among Fig. 1 in the display can have a plurality of display units of arranging by certain figure or X-Y rectangular.Each display unit includes at least one cathode fluorescent tube 2, and it can be spirality, " U " shape, many U-shapeds or other shape; Printing opacity cell-shell 3, it can be taper shape or other shape, and it is latter half of reflector 4, makes the fluorescent tube issued light can concentrate emission forward, to improve light utilization efficiency or to obtain the required photodistributed smooth angle of emergence.Fluorescent tube 2 and cell-shell 3 are fixed on the base 5, and this base 5 also can be designed to other shape, as lamp holder shape etc.Screw hole 7 that promising fixedly display unit uses also is set and for putting the groove 8 of sealing ring on the base, screw hole 7 and the groove 8 of putting sealing ring are used for being fixed on the display system display unit and waterproof sealing.Two ends of described every tubes 2 have at least one electrode 9, and they link to each other with the output 11 of driver 10.One end ground connection of this output; The input 12 of driver 10 links to each other with DC or AC external power 13.The picture signal input 14 of driver 10 is used for operating time of Control Driver 10, promptly controls the brightness of fluorescent tube 2.Described driver can be DC/AC converter or AC/AC converter, and the high-frequency high-voltage with the DC or the AC voltage transition of input becomes to be suitable for driving cathode fluorescent tube is used to drive fluorescent tube.On near the tube outer wall at least one electrode 9 of fluorescent tube trigger electrode 15 is arranged, this trigger electrode 15 links to each other with the output that triggers driver 16, and the formation trigger equipment; Trigger driver and can be a DC/AC or AC/AC converter, DC or AC voltage or the pulse voltage of input are transformed into high-frequency high-voltage, make trigger electrode through glass-tube and lamp tube electrode discharge, in glass-tube, produce sufficient amount near the electrode initiating electron bright with instantaneous of fluorescent tube of assurance.Trigger an end ground connection of driver 16 outputs, control voltage 17 is sent out in its input contact.Described trigger electrode 15 can directly be produced on the glass-tube outer wall of fluorescent tube 2, also can be produced on the base 5 of fixed lamp tube, and 2 of trigger electrode 15 and fluorescent tubes have fixing glue (6).Every tubes 2 has a trigger electrode 15 at least, and the trigger electrode of many tubes can interconnect public one and trigger driver 16.

Fig. 2 is the operating voltage oscillogram of circuit shown in Figure 1.18a, 18b among Fig. 2 ... be the control voltage of each display unit drive circuit 10, i.e. luminance signal pulse, different pulse durations are different brightness, each luminance signal pulse has identical zero-time, shown in t among Fig. 2.19a and 19b ... output high-frequency and high-voltage voltage for each driver 10 is used to light each fluorescent tube 2.The control impuls 20 that triggers driver 17 be positioned at before the bright pulse zero-time t or preceding and after.The output high-frequency and high-voltage voltage 21 that triggers driver 16 links to each other with trigger electrode 15, it promptly was added between electrode 15 and the lamp tube electrode 9 before bright pulse arrives, produce enough initiating electrons near making electrode, fluorescent tube 2 is can instantaneous bright when guaranteeing that bright pulse arrives, shinny degree is also very stable when making low duty ratio, thereby can get the high quality graphic of every primary colors 8 bits or more gray scales.

Described trigger impulse 21 also can be continuous, and the input 17 that promptly triggers driver 16 is normal opens.At this moment not necessarily will align in the forward position of luminance signal, as shown in Figure 3.

Described driver can be installed on the substrate of display system, also can constitute an integral body with fluorescent tube 2, cell-shell 3 and base 5, forms a unit, is installed in then on the display system substrate.

Described fluorescent tube 2 can be mutually homochromy and not homochromy, and example is red, blue, green three primary colors, and one group of red bluish-green three-basic-colour lamp is formed each pixel.Thereby can show monochrome, polychrome and panchromatic character, figure and image etc.

Each embodiment that the claimed scope of the utility model is not limited to introduce herein, the know-how that relates to is that the general personnel of this specialty are familiar with, and therefore as long as understand content of the present utility model, can do various forms of conversion and replacement.

Claims

1, a kind of cold-cathode fluorescent display, it includes a plurality of cold-cathode fluorescent display units, each unit comprises at least one cathode fluorescent tube, a light transmission container, a firm banking, a driver, the output of driver links to each other with the electrode of fluorescent tube two ends, its input links to each other with external voltage, it is characterized in that near the tube outer wall of described at least one electrode (9) at least one trigger electrode (15) being arranged, this trigger electrode (15) links to each other with triggering driver (16), and a plurality of display units can a public triggering driver (16).

2, a kind of cold-cathode fluorescent display as claimed in claim 1, its feature with described fluorescent tube (2) be list or Double-spiral, " U " shape or many " U " shapes or other shapes.

3, a kind of cold-cathode fluorescent display as claimed in claim 1 or 2, it is characterized in that described fluorescent tube (2) for identical illuminant colour or different colors, as fluorescent tubes red, blue, green three primary colors.

4, a kind of cold-cathode fluorescent display as claimed in claim 1 is characterized in that described light transmission container is the shape or the face of cylinder flute profile of various bulbs, and they latter half of has reflector (4).

5, a kind of cold-cathode fluorescent display as claimed in claim 1, it is characterized in that described trigger electrode (15) is arranged near the tube outer wall of fluorescent tube (2) electrode (9), or be arranged on the base (5) of fixed lamp tube, between trigger electrode (15) and the fluorescent tube (2) fixing glue (6) is arranged, the trigger electrode of a plurality of display units (15) can interconnect, and public one is triggered driver (16).

6, a kind of cold-cathode fluorescent display as claimed in claim 1 is characterized in that described driver can be DC that will input or high-frequency high-voltage DC/AC converter or the AC/AC converter that the AC voltage transition becomes to be suitable for driving cathode fluorescent tube.

7, a kind of cold-cathode fluorescent display as claimed in claim 1, it is characterized in that described trigger electrode and trigger driver having constituted trigger equipment, trigger driver can be will input DC or AC voltage or the pulse voltage DC/AC or the AC/AC converter that are transformed into high-frequency high-voltage.