CN1409357A - Vacuum fluorescent display - Google Patents
Vacuum fluorescent display Download PDFInfo
- Publication number
- CN1409357A CN1409357A CN02105518A CN02105518A CN1409357A CN 1409357 A CN1409357 A CN 1409357A CN 02105518 A CN02105518 A CN 02105518A CN 02105518 A CN02105518 A CN 02105518A CN 1409357 A CN1409357 A CN 1409357A
- Authority
- CN
- China
- Prior art keywords
- phosphor powder
- powder layer
- fluorescent display
- layer
- anode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
- H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
- H01J31/15—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen with ray or beam selectively directed to luminescent anode segments
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2229/00—Details of cathode ray tubes or electron beam tubes
- H01J2229/92—Means providing or assisting electrical connection with or within the tube
- H01J2229/925—Means providing or assisting electrical connection with or within the tube associated with the high tension [HT], e.g. anode potentials
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
A vacuum fluorescent display is provided to reduce manufacturing costs by allowing for a wide variety of colors by using the reduced numbers of phosphors. A fluorescent display tube comprises a front substrate and a rear substrate which are joined with each other by a side glass so as to constitute a vacuum container; a filament fixed within the vacuum container, and which emits thermal electrons; a plurality of anode electrodes arranged at the surface of the front or rear substrate, and which are applied with a voltage through a wire layer; a control electrode for accelerating or cutting off the thermal electrons emitted from the filament; and a plurality of dot or segment type light emitting layers arranged at the surfaces of anode electrodes, and which emits light by the thermal electrons. The light emitting layers are partially formed by the fluorescent layers stacked into two or more layers.
Description
Technical field
The present invention relates to a kind of vacuum fluorescent display, more particularly, relate to a kind of following vacuum fluorescent display, wherein, the fluorescent material of different colours piles up with sandwich construction, thus combination that can be by different colours fluorescent material and real coloured image.
Background technology
In vacuum fluorescent display, in (VFD), by control, optionally clash into from the cathode electrode electrons emitted, and illuminate phosphor powder layer, thereby realize the reality of special pattern with phosphor powder layer by gate electrode and anode electrode.VFD provides the splendid definition and the visual angle of broad, and it can utilize low voltage drive, thereby adopts semiconductor device easily, and it is highly reliable.As a result, VFD is used for many purposes.
Have diode, triode and tetrode type VFD, and according to the structure of viewing area, have common, front lit and double deck type VFD.Yet triode, plain edition VFD are the most frequently used.This VFD comprises the almost parallel setting and has the preceding substrate and the back substrate of predetermined gap therebetween, and seal this to substrate to form the side glass of integrally formed vacuum subassembly; Be formed on the anode electrode on the back substrate and be formed on phosphor powder layer on the anode electrode with predetermined pattern; Be installed in a plurality of filaments between phosphor powder layer and the preceding substrate, this filament is launched hot electron applying under the voltage condition; And being installed in screen cloth type grid between anode electrode and the filament, grid act as and quickens or stop from the hot electron of filament emission.
In aforesaid VFD structure, might provide control electrode to replace gate electrode on the excircle of anode electrode.Control electrode forms by the insulation grid and the conductive layer of predetermined altitude.
Anode electrode is by being printed as the line segment structure with conductive film or a plurality of somes shapes form, and conductive film is made by the electric conducting material such as graphite.Only be applied to gate electrode and anode electrode on the two the time, just strike on the fluorescent material to realize predetermined picture from the hot electron of filament emission at positive voltage.
In addition, use various dissimilar fluorescent material to realize the demonstration of broad visible light from short blue light wavelength to long red light wavelength.Yet VFD generally is configured to great majority and comprises green ZnO: Zn fluorescent material, this fluorescent material is realized high-resolution with low-voltage, and in specific area, green emitting phosphor together uses with the fluorescent material that sends different colours.
In the VFD that constructs as mentioned above, because fluorescent material can only be launched independent a kind of particular color, the line segment of each printing or point also can only be launched independent a kind of color.So,, will provide the different fluorescent material of respective numbers if realize the demonstration of two or more colors.That is to say,, three kinds of different fluorescent material of emission required color must be provided, and, in VFD, must comprise the different fluorescent material of equal number in order to realize five kinds of colors in order to realize three kinds of colors.
Yet, at present, only have the fluorescent material of the limited quantity of emission different colours, thereby VFD only can realize a spot of color.If show different colors, must develop the fluorescent material that sends this color.Time of being utilized and investment cause the overall composition of VFD to rise for this purpose.
Summary of the invention
The present invention has worked hard to address the above problem.
The purpose of this invention is to provide a kind of vacuum fluorescent display, it can utilize the different fluorescent material of lesser amt and show various color, thereby can avoid developing the expensive process of different colours fluorescent material.
To achieve these goals, the invention provides a kind of vacuum fluorescent display, comprise by a pair of almost parallel setting and the vacuum subassembly that has the substrate of predetermined gap therebetween and place the side glass between each substrate to form; Be arranged in the vacuum subassembly in two substrates a plurality of anode electrodes at least one, anode electrode receives external drive voltage; Be formed on a plurality of cathode electrodes within the vacuum subassembly, cathode electrode heat of emission electronics; Be used to quicken and block the thermionic control electrode of launching from cathode electrode; And be formed on luminous component on the anode electrode, luminous component is luminous by interacting with the hot electron of launching from cathode electrode, wherein, at least one luminous component is formed by the two-layer at least phosphor powder layer that sends different colours, and one of described two-layer at least phosphor powder layer directly piles up on another.
According to feature of the present invention, the phosphor powder layer that piles up is measure-alike.
The phosphor powder layer size difference of piling up according to another characteristic of the invention.
According to a feature more of the present invention, the phosphor powder layer that piles up comprises following phosphor powder layer that is provided with in contact with anode electrode and the last phosphor powder layer that is stacked on down on the phosphor powder layer, and following phosphor powder layer is bigger than last phosphor powder layer.
The feature again according to the present invention, at least one luminous component forms by piling up three layers of phosphor powder layer that send different colours, but and remaining luminous component is made of one of the single layer structure of the phosphor powder layer that sends a kind of color and double-deck two kinds of selection schemes of the phosphor powder layer that sends different colours.
The feature again according to the present invention, control electrode is the grid grid between cathode electrode and the anode electrode.
The feature again according to the present invention, control electrode comprise on the substrate insulation grid wall that forms around anode and are formed on conductive layer on the insulation grid wall far-end that wherein anode electrode is formed on the substrate.
The feature again according to the present invention, control electrode are included in the single-layer metal grid wall that forms around anode on the formed substrate of anode.
Description of drawings
The accompanying drawing that is herein incorporated and constitutes the part of specification illustrates embodiments of the invention, and act as together in specification and to explain principle of the present invention:
Fig. 1 is the profile according to the vacuum fluorescent display of first preferred embodiment of the invention;
Fig. 2 is the profile according to the vacuum fluorescent display of second preferred embodiment of the invention;
Fig. 3 is the profile according to the vacuum fluorescent display of third preferred embodiment of the invention;
Fig. 4 is the profile according to the vacuum fluorescent display of four preferred embodiment of the invention; And
Fig. 5 is the profile according to the vacuum fluorescent display of fifth preferred embodiment of the invention.
Embodiment
Describe the preferred embodiment of the present invention with reference to the accompanying drawings in detail.
Fig. 1 illustrates the profile according to the vacuum fluorescent display of first preferred embodiment of the invention.The vacuum fluorescent display of first preferred embodiment of the invention (VFD) is triode, plain edition VFD.
The outside of VFD is limited by integrally formed vacuum subassembly 17, this vacuum subassembly is by the almost parallel setting and has the preceding substrate 14 and the back substrate 16 of predetermined gap therebetween, and before being positioned between substrate 14 and the back substrate 16 and at the side glass 12 of its apparent surface's outer circumferential edges part.
A plurality of filaments 18 that act as cathode electrode are arranged within the vacuum subassembly 17.Filament 18 is hung in the mode that is parallel to preceding and back substrate 14,16 by a strutting piece (not shown).Filament 18 is made as the thin tungsten filament of barium (Ba), strontium (Sr) and calcium (Ca) by depositing oxidation material.
In addition, anode unit is formed on the inner surface of the back substrate 16 within the vacuum subassembly 17, and this anode unit can make special pattern pass through to be realized from the hot electron of filament 18 emissions.Control electrode 20 is installed between anode unit and the filament 18, and act as acceleration or blocking-up hot electron.Control electrode 20 realizes that by the grid grid it is configured to the luminous pattern around anode unit (below will describe in detail).The grid grid is formed by following method, that is, the sheet metal as thin as a wafer by etching SUS material quality forms grid, around the grid circumference one strutting piece is set then.
Anode unit is included in the conductor layer 22 that forms specific pattern on the back substrate 16, be formed on the conductor layer 22 and comprise the insulating barrier 24 of a plurality of hole 24a, be formed on the some layer 26 among the hole 24a of insulating barrier 24, be formed on anode electrode 28 on the insulating barrier 24 with the state of contact point layer 26, and be formed on the luminous component 30 and 32 on the anode electrode.Luminous component 30 has single layer structure, and luminous component 32 has sandwich construction.
In more detail, point or the line segment type first phosphor powder layer 30a are formed on each anode electrode 28, and the second phosphor powder layer 30b that sends with the first phosphor powder layer 30a different colours is formed on the selected first phosphor powder layer 30a.The second phosphor powder layer 30b forms with the first phosphor powder layer 30a measure-alike.In Fig. 1, show the luminous component of realizing by the first phosphor powder layer 30a single layer structure 30, and show the luminous component of realizing by the first phosphor powder layer 30a and the second phosphor powder layer 30b double-decker 32.
The first and second phosphor powder layer 30a and 30b can utilize green ZnO respectively: Zn fluorescent material and blue ZnS: Zn fluorescent material forms, or utilizes green ZnO respectively: Zn fluorescent material and red Y
2O
2S: Eu fluorescent material forms.In addition, the first and second phosphor powder layer 30a and 30b can be respectively by using white fluorescent powder and fluorescent orange powder to form.In Fig. 1, though luminous component 30 is illustrated as single layer structure, and 32 double-deckers of luminous component might all form double-decker with luminous component 30 and 32.
In the VFD of first preferred embodiment of the invention, 34 voltages that are applied on the conductor layer 22 are transferred to each anode electrode 28 by a layer 26 by going between.By the control of gate electrode 20, the hot electron of launching from filament 18 (that is, anode electrode) strikes on luminous component 30 and 32, and illuminates the latter, thereby shows specific image.
At the first and second phosphor powder layer 30a and 30b respectively by green ZnO: Zn fluorescent material and blue ZnS: under the situation that Zn fluorescent material forms, luminous component 30 sends green, and luminous component 32 is by mixing the green and blue cyan of sending.On the other hand, if the first phosphor powder layer 30a is green ZnO: Zn fluorescent material, and the second phosphor powder layer 30b is red Y
2O
2X: Eu fluorescent material, send yellow from luminous component 32 so.As another example,, can send apricot from luminous component 32 if the first phosphor powder layer 30a is a white fluorescent powder and the second phosphor powder layer 30b is the fluorescent orange powder.
Following table 1 is the VFD of first preferred embodiment of the invention and the contrast between the prior art VFD.Promptly, table 1 relatively utilizes single layer structure fluorescent material with the quantity that the prior art VFD that is used for luminous component realizes the fluorescent material that the color of realization equal number among the required fluorescent material quantity of one to six kind of different colours and the VFD in the first preferred embodiment of the invention is required, utilizes double-decker to be used at least some luminous components in the VFD of the preferred embodiment of the present invention.
Table 1: the comparison of the present invention and fluorescent material quantity needed in the art
| Prior art | First preferred embodiment of the invention | |
| The fluorescent material quantity that shows a kind of color | ????1 | ????1 |
| The fluorescent material quantity that shows two kinds of colors | ????2 | ????2 |
| The fluorescent material quantity that shows three kinds of colors | ????3 | ????2 |
| The fluorescent material quantity that shows four kinds of colors | ????4 | ????3 |
| The fluorescent material quantity that shows five kinds of colors | ????5 | ????3 |
| The fluorescent material quantity that shows six kinds of colors | ????6 | ????3 |
Can find out obviously that from table 1 in traditional VFD, every kind of Show Color needs the fluorescent material of this color.Therefore, if will show six kinds of colors, just need six kinds of different fluorescent material.Yet in first preferred embodiment of the invention, Fig. 1 is described as reference, because fluorescent material is used in combination, and only needs the fluorescent material of lesser amt.
Fig. 2 illustrates the profile according to the vacuum fluorescent display of second preferred embodiment of the invention.Similar Reference numeral will be used for the VFD components identical with first preferred embodiment of the invention.Equally, suppose that not the element of describing is identical with structure and operation principle in the first preferred embodiment of the invention.
With reference to Fig. 2, in the VFD of second preferred embodiment of the invention, the three-decker of luminous component 32 ' by first, second and the 3rd phosphor powder layer 30a, 30b and 30c realizes.On the other hand, luminous component 30 is realized by a kind of single layer structure among first, second or the 3rd phosphor powder layer 30a, 30b or the 30c.For luminous component 30, also might by from constitute luminous component 32 ' three kinds of phosphor powder layer 30a, 30b and 30c select two kinds double-decker and realize.
Below table 2 be the contrast of the VFD and the prior art VFD of second preferred embodiment of the invention.That is, table 2 relatively utilizes the fluorescent material single layer structure to realize the quantity of the fluorescent material that the color of realization equal number among the required fluorescent material quantity of one to six kind of different colours and the VFD in the second preferred embodiment of the invention is required with the prior art VFD that is used for luminous component.
Table 2: in the contrast of the quantity of the present invention and fluorescent material needed in the art
| Prior art | Second preferred embodiment of the invention | |
| The fluorescent material quantity that shows three kinds of colors | ????3 | ????3 |
| The fluorescent material quantity that shows four kinds of colors | ????4 | ????3 |
| The fluorescent material quantity that shows five kinds of colors | ????5 | ????3 |
| The fluorescent material quantity that shows six kinds of colors | ????6 | ????3 |
| The fluorescent material quantity that shows seven kinds of colors | ????7 | ????3 |
| The fluorescent material quantity that shows eight kinds of colors | ????8 | ????4 |
In the present invention's first and second preferred embodiments, the measure-alike structure of phosphor powder layer that constitutes luminous component has been described.Yet in third preferred embodiment of the invention, as shown in Figure 3, the first and second phosphor powder layer 30a have different width with 30b.Equally, similar Reference numeral is used for the VFD components identical with first preferred embodiment of the invention, and the element do not described of hypothesis is identical with structure and operation principle in the first preferred embodiment of the invention.
In the VFD according to third preferred embodiment of the invention, luminous component 32 realizes that by double-decker wherein the first phosphor powder layer 30a is greater than the second phosphor powder layer 30b that is arranged on the first phosphor powder layer 30a.By this structure, when utilizing typography or other this class technology to form the first and second phosphor powder layer 30a and 30b, because the first phosphor powder layer 30a size is greater than the second phosphor powder layer 30b, the second phosphor powder layer 30b just might be eccentric a little on the first phosphor powder layer 30a.So,, can not too accurately carry out typography for first and second phosphor powder layer 30a that will realize and the color combination of 30b.
Figure 4 and 5 illustrate the profile of the vacuum fluorescent display of the 4th and the 5th preferred embodiment according to the present invention respectively.Equally, similar Reference numeral is used for and the first preferred embodiment of the invention components identical, and also the element do not described of hypothesis is identical with structure and operation principle in the first preferred embodiment of the invention.
With reference to accompanying drawing, in the VFD of the 4th and the 5th preferred embodiment, used the control electrode 20 that is different from the used grid electrode structure of first, second and the 3rd preferred embodiment according to the present invention.
At first, in four preferred embodiment of the invention as shown in Figure 4, insulation grid wall 36 is printed onto on anode electrode 28 predetermined altitude all around, and insulating barrier 38 is printed onto on the upper surface of insulation grid wall 36.
In fifth preferred embodiment of the invention shown in Figure 5, control electrode 20 is realized by metallic grid wall 40, and metallic grid wall 40 is single-layer metal material (one-tenth predetermined pattern) formation by the etched height conduction.Metallic grid wall 40 has with anode electrode 28 regional same widths by preparation and has the metal material that can realize electronically controlled predetermined thickness (t), utilizes traditional this metal of photoetching process etching to be formed to remove selected part then.
When comparing with the grid grid, above-mentioned control electrode does not almost have design constraint.So, freer in the master-plan of VFD, thus can realize various display device structures.
In the VFD of the invention described above, the sandwich construction of the phosphor powder layer of two or three layers of different colours is used to selected luminous component, thereby, can realize shades of colour by the combination of each phosphor powder layer.So, can not having development to show this color under corresponding to the prerequisite of the new phosphors of required Show Color, and be less than traditional VFD for the quantity of the required different colours fluorescent material of the color that realizes equal number, manufacturing cost reduces as a result.
Though described the preferred embodiment of the present invention above in detail, be understood that by those skilled in the art can realize in the multiple change of the basic inventive concept of this instruction and/or revise and will fall among the marrow of the present invention and scope that appended claims limits.
Claims (8)
1. vacuum fluorescent display comprises:
By a pair of almost parallel setting and the vacuum subassembly that has the substrate of predetermined gap therebetween and place the side glass between each substrate to form;
Be arranged in the vacuum subassembly in two substrates a plurality of anode electrodes at least one, anode electrode receives external drive voltage;
Be formed on a plurality of cathode electrodes within the vacuum subassembly, cathode electrode heat of emission electronics;
Be used to quicken and block the thermionic control electrode of launching from cathode electrode; And
Be formed on the luminous component on the anode electrode, luminous component is luminous by interacting with the hot electron of launching from cathode electrode,
Wherein, at least one luminous component is formed by the two-layer at least phosphor powder layer that sends different colours, and one of described two-layer at least phosphor powder layer directly piles up on another.
2. vacuum fluorescent display as claimed in claim 1 is characterized in that the phosphor powder layer that piles up is measure-alike.
3. vacuum fluorescent display as claimed in claim 1 is characterized in that, the phosphor powder layer size difference of piling up.
4. vacuum fluorescent display as claimed in claim 3 is characterized in that, the phosphor powder layer that piles up comprises following phosphor powder layer that is provided with in contact with anode electrode and the last phosphor powder layer that is stacked on down on the phosphor powder layer, and following phosphor powder layer is bigger than last phosphor powder layer.
5. vacuum fluorescent display as claimed in claim 1, it is characterized in that, at least one luminous component forms by piling up three layers of phosphor powder layer that send different colours, but and remaining luminous component is made of one of the single layer structure of the phosphor powder layer that sends a kind of color and double-deck two kinds of selection schemes of the phosphor powder layer that sends different colours.
6. vacuum fluorescent display as claimed in claim 1 is characterized in that, control electrode is the grid grid between cathode electrode and the anode electrode.
7. vacuum fluorescent display as claimed in claim 1 is characterized in that, control electrode comprises insulation grid wall that centers on anode formation on the substrate and the conductive layer that is formed on the insulation grid wall far-end, and wherein anode electrode is formed on the substrate.
8. vacuum fluorescent display as claimed in claim 1 is characterized in that, control electrode is included in the single-layer metal grid wall that forms around anode on the formed substrate of anode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010060266A KR100814839B1 (en) | 2001-09-27 | 2001-09-27 | Vacuum fluorescent display |
| KR0060266/2001 | 2001-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1409357A true CN1409357A (en) | 2003-04-09 |
Family
ID=19714771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02105518A Pending CN1409357A (en) | 2001-09-27 | 2002-04-12 | Vacuum fluorescent display |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100814839B1 (en) |
| CN (1) | CN1409357A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392712C (en) * | 2003-03-26 | 2008-06-04 | 三洋电机株式会社 | Driving circuit of vacuum fluorescent display |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5289382B2 (en) * | 2010-05-17 | 2013-09-11 | ノリタケ伊勢電子株式会社 | Fluorescent display tube with built-in IC for driving |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100274240B1 (en) * | 1993-11-19 | 2000-12-15 | 김순택 | Vacuum fluorescent display |
-
2001
- 2001-09-27 KR KR1020010060266A patent/KR100814839B1/en not_active IP Right Cessation
-
2002
- 2002-04-12 CN CN02105518A patent/CN1409357A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392712C (en) * | 2003-03-26 | 2008-06-04 | 三洋电机株式会社 | Driving circuit of vacuum fluorescent display |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20030028247A (en) | 2003-04-08 |
| KR100814839B1 (en) | 2008-03-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2028251B1 (en) | White phosphor, light emission device including the same, and display device | |
| US7839468B2 (en) | White phosphor, light emission device including the same, and liquid crystal display device including the light emission device as backlight unit | |
| KR100187376B1 (en) | Fluorescent display device with blue filter | |
| CN1249774C (en) | Panel display and method for mfg. panel display cathode | |
| JP3057338B2 (en) | Color recording device | |
| JP2937086B2 (en) | Phosphor and fluorescent display device | |
| CN101075543B (en) | Light emission device and display device | |
| CN1409357A (en) | Vacuum fluorescent display | |
| EP1758147A2 (en) | Electron emission element, electron emission display, and method of manufacturing electron emission unit for the electron emission display | |
| KR100533512B1 (en) | Phosphor of warm luminous colors and fluorescent display device | |
| CN1896835A (en) | Display device | |
| CN100385604C (en) | Electron emission device and method of manufacturing the same | |
| JP3063644B2 (en) | Fluorescent display tube | |
| EP1727114A1 (en) | Electronic emission display device and method of controlling brightness thereof | |
| KR0170447B1 (en) | Plasma display device | |
| JP3178823B2 (en) | Display device | |
| US20020140340A1 (en) | Fluorescent display tube having provision for preventing short-circuit therein, and method of manufacturing the same | |
| CN101183637B (en) | Light emission device and display device using the light emission device as a light source | |
| CN1959921A (en) | Electron emission display | |
| JPH10321170A (en) | Color luminescence display element | |
| KR800000296B1 (en) | Flat panel display apparatus | |
| KR20050051830A (en) | Flat panel display device | |
| JP2513389B2 (en) | Color shift fluorescent display tube | |
| KR20070053486A (en) | Electron emission display device | |
| KR20070046511A (en) | Electron emission display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |