CN1402301A - Field emission display board and driving method thereof - Google Patents
Field emission display board and driving method thereof Download PDFInfo
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- CN1402301A CN1402301A CN 02131144 CN02131144A CN1402301A CN 1402301 A CN1402301 A CN 1402301A CN 02131144 CN02131144 CN 02131144 CN 02131144 A CN02131144 A CN 02131144A CN 1402301 A CN1402301 A CN 1402301A
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Abstract
A field emitting display panel and its drive method is characterized by that the high voltage on anode makes the cathode generate field emission of electronic and the voltage of strip grid under cathode is modulated to control the field emission of cathode, so displaying the image. Its advantages are high definition and brightness, and low cost.
Description
(1) technical field:
The present invention relates to a kind of field emission display board, relate in particular to the triode type field emission display board.
(2) background of invention:
Conventional triode type field emission display board structure is assembled by prebasal plate 1a, metacoxal plate 2a subtend as shown in Figure 1, the distance that is maintained fixed by supporter 3a array.Prebasal plate 1a goes up and makes bar shaped anode 4a, fluorescent material 5a, be followed successively by the bar shaped negative electrode 6a vertical on the metacoxal plate 2a with bar shaped anode 4a, the dielectric layer 7a of opening exposed portions serve negative electrode is with corresponding with bar shaped anode 4a, the strip gab grid 8a of vertical and bar shaped negative electrode 4a.Wherein make the material 9a that can produce the field-causing electron emission, the little point of for example various conductions, diamond thin, graphite or CNT (carbon nano-tube) etc. on the negative electrode with on the crosspoint of bar shaped anode and bar shaped gate openings.The field emitted electron that negative electrode produces passes gate openings and flows to anode.The shortcoming of this structure is that grid and negative electrode are made relatively difficulty in manufacture process.
Another kind of triode type field emission display board structure is that grid 8b is embedded under the negative electrode 6a as shown in Figure 2, utilize the highfield of grid and cathode edge, make cathode edge produce the field-causing electron emission, because grid is produced on before the negative electrode, and do not influence the making of negative electrode, therefore solved the making difficult problem of said structure.But therefore this structure can not improve anode voltage owing to lost the shielding action of grid antianode, otherwise can directly make negative electrode produce the field-causing electron emission; Mainly concentrate on cathode side edge and grid infall because field-causing electron is launched on the other hand, so cathode side is bigger along current density, is unfavorable for improving the life-span; This structure electron scattering simultaneously is serious, and the bundle spot is bigger, so brightness is low, must dwindle the distance between negative electrode and the anode in order to prevent to crosstalk, and has equally also limited anode voltage, is unfavorable for improving luminous efficiency.
(3) summary of the invention:
The objective of the invention is to provide a kind of triode type field emission display board and driving method thereof, it is characterized in that this display panel directly makes negative electrode produce the field-causing electron emission by anode, and stop negative electrode to produce field-causing electron to launch and show required image by on the grid that is embedded under the negative electrode, applying the voltage that is lower than negative electrode.This display panel has higher resolution and luminosity, more uniform demonstration, higher rate of finished products, lower manufacturing cost.
Field emission display board structure among the present invention is assembled by prebasal plate glass 1, metacoxal plate glass 2 subtends as shown in Figure 4, the distance that is maintained fixed by supporter 3 arrays.Make anode 4, fluorescent material 5 on the prebasal plate glass 1, be followed successively by bar shaped grid 6 on the metacoxal plate glass 2, thickness is the local of 0.1-50 micron or the dielectric layer 7 that all covers bar shaped grid 6, makes the bar shaped negative electrode 8 of the width vertical with bar shaped grid 6 less than its adjacent spacing on dielectric layer 7.Wherein 8 on bar shaped negative electrode is as the material that can produce the field-causing electron emission, or makes the material that can produce the field-causing electron emission with place, bar shaped grid crosspoint or its all surfaces thereon.To carry out hermetic seal with low-melting glass around above-mentioned prebasal plate 1 and the metacoxal plate 2,, just formed field emission display board provided by the present invention through vacuumizing the back sealed-off.The working method of this display panel is as follows: establishing the negative electrode low level is Vcl, (being generally 0V), high level is Vco, the grid low level is Vgl, and high level is Vgh, applies fixedly high pressure Va on anode, be generally hundreds of to several ten thousand volts, its voltage amplitude requires to when grid being (grid potential is high level Vgh usually, and identical or close with negative electrode low level Vcl) when allowing the negative electrode field emission, and negative electrode field-causing electron emission reaches and shows required peak value; And work as grid for forbidding negative electrode field emission (grid potential is low level Vgl usually, is lower than negative electrode low level Vcl), the emission of negative electrode field-causing electron ends.Grid is carried out addressing line by line, and selected line applies high level Vgh remaining row and applies low level Vgl, applies on the negative electrode and the corresponding pulse of required display image, and when needing to show on institute's respective column, corresponding negative electrode is low level Vcl; And the negative electrode of correspondence is high level Vch when not having demonstration on institute's respective column; Width or number by pulse on the control cathode realize that gray scale shows.So line by line, circulation can realize that video shows frame by frame.
The present invention has the following advantages: 1. because negative electrode is made grid after, so field emission material can not influence grid, and manufacturing process is simple, and therefore, the present invention is suitable for production in enormous quantities, the raising rate of finished products reduces production costs.2. in field emission display board of the present invention, the anticathode effect of grid is launched and is realized controlling by the restriction cathode electronics, and the electronics emission is directly to be produced by anode high voltage and cathodic process, therefore makes negative electrode produce the good uniformity of field-causing electron emission than traditional grid voltage that passes through.3. compare with existing back grid audion, cathode emissive area of the present invention increases greatly, so the required current density minimizing of negative electrode, helps improving device lifetime.4. owing to grid in the field emission display board of the present invention is near apart from negative electrode, therefore anticathode control action is greater than anode, therefore compare with existing back grid audion, can improve anode working voltage, thereby allow to adopt the high high-pressure fluorescence powder of luminous efficiency to improve the luminous efficiency of device.5. compare with existing back grid audion, the electron beam that negative electrode produces among the present invention defocusing effect in the process of anode motion is little, therefore can increase the distance between the front-back baseboard and can not influence hot spot.Help improving anode working voltage equally and increase this distance.
(4) description of drawings:
Fig. 1 causes reflective display panel structural profile schematic diagram for traditional triode field
Fig. 2 causes the reflective display panel section of structure for grid triode field, existing back
Fig. 3 causes reflective display panel structure working principle figure for grid triode field, existing back
Fig. 4 causes the reflective display panel structure chart for grid triode field behind the present invention
Fig. 5 is the embodiment of the invention one sectional arrangement drawing
Fig. 6 is the embodiment of the invention two sectional arrangement drawings
Fig. 7 is the embodiment of the invention three metacoxal plate sectional arrangement drawings
Fig. 8 is grid triode field emission display panel fundamental diagram behind the present invention
(5) embodiment:
On the basis of foregoing invention, further consider concrete structure, propose following various embodiment, and, further specify the distinctive advantage of each embodiment by specific embodiment.1. first kind of embodiment of the present invention comprise by front glass substrate 1c, back glass substrate 2c subtend assembling as shown in Figure 5, the distance that is maintained fixed by supporter 3c array.Front glass substrate 1c goes up and makes anode 4c, fluorescent material 5c, be followed successively by bar shaped grid 6c on the metacoxal plate glass 2c, thickness is the local of 0.1-50 micron or the dielectric layer 7c that all covers bar shaped grid 6c, makes the bar shaped negative electrode 8c of the width vertical with bar shaped grid 6c less than spacing on dielectric layer 7c.Wherein bar shaped negative electrode 8c is originally as the material that can produce the field-causing electron emission, or make the material 9c that can produce the field-causing electron emission, the little point of for example various conductions, diamond thin, graphite or CNT (carbon nano-tube) etc. with place, bar shaped grid crosspoint or its all surfaces thereon.To carry out hermetic seal with low-melting glass around above-mentioned prebasal plate glass 1c and the metacoxal plate glass 2c,, just formed field emission display board provided by the present invention through vacuumizing the back sealed-off.The working method of this display panel is as shown in Figure 8: apply fixedly high pressure on anode, be generally hundreds of to several ten thousand volts, its voltage amplitude requires to being (grid is identical with cathode potential or close) when allowing negative electrode (row electrode) field emission when grid (column electrode), and negative electrode field-causing electron emission reaches and shows required peak value; And work as grid for forbidding negative electrode field emission (grid potential is lower than cathode potential), the emission of negative electrode field-causing electron ends.Grid is carried out addressing line by line, and selected line applies the high potential remaining row and applies electronegative potential, applies on the negative electrode and the corresponding pulse of required display image, and when needing to show on institute's respective column, corresponding cathode potential is identical with the grid high potential or close; And the cathode potential of correspondence is higher than the grid high potential negative electrode field emission is ended when do not have showing on institute's respective column; Width or number by pulse on the control cathode realize that gray scale shows.So line by line, circulation can realize that video shows frame by frame.
2. second kind of embodiment of the present invention assembled by prebasal plate glass 1e, metacoxal plate glass 2e subtend as shown in Figure 6, the distance that is maintained fixed by supporter 3e array.Front glass substrate 1e goes up and makes fluorescent material 5e, and thickness is the aluminium anodes 4e of 0.01-1 micron, and when anode voltage surpassed 5000V, the aluminium film can be protected fluorescent material, prevents that high pressure is saturated; Be followed successively by bar shaped grid 6e on the metacoxal plate glass 2e, thickness is the local of 0.1-50 micron or the dielectric layer 7e that all covers bar shaped grid 6e, makes the bar shaped negative electrode 8e of the width vertical with bar shaped grid e6 less than spacing on dielectric layer 7e.Wherein bar shaped negative electrode 8e is originally as the material that can produce the field-causing electron emission, or make the material 9e that can produce the field-causing electron emission, the little point of for example various conductions, diamond thin, graphite or CNT (carbon nano-tube) etc. with place, bar shaped grid crosspoint or its all surfaces thereon.To carry out hermetic seal with low-melting glass around above-mentioned prebasal plate glass 1e and the metacoxal plate glass 2e,, just formed field emission display board provided by the present invention through vacuumizing the back sealed-off.The working method of this display panel is with embodiment 1.
3. among above-mentioned first and second embodiment, as shown in Figure 7, the bar shaped negative electrode 8d of metacoxal plate goes up and makes bar resistor layer 10d, this resistive layer can limit the cathode emission electric current, to improve the consistency of whole screen emission, on bar resistor layer 10d, make the material 9d that can produce the field-causing electron emission, the little point of for example various conductions, diamond thin, graphite or CNT (carbon nano-tube) etc. with place, bar shaped grid crosspoint or its all surfaces.To carry out hermetic seal with low-melting glass around above-mentioned prebasal plate glass 1d and the metacoxal plate glass 2d, through vacuumizing the back sealed-off, just formed field emission display board provided by the present invention, the working method of this display panel is with embodiment 1.
Claims (6)
1. a field emission display board is assembled by front glass substrate (1), back glass substrate (2) subtend; The distance that is maintained fixed by supporter (3) array; Be followed successively by anode (4), fluorescent material (5) on the front glass substrate (1); Be followed successively by bar shaped grid (6) on the metacoxal plate glass (2), thickness is the local of 0.1-50 micron or the dielectric layer (7) that all covers bar shaped grid (6), goes up at dielectric layer (7) and makes the bar shaped negative electrode (8) vertical with bar shaped grid (6); The width that it is characterized in that bar shaped negative electrode (8) is less than its adjacent spacing.
2. field emission display board according to claim 1 also can be earlier fluorescent material (5) on the described front glass substrate (1), and the back is that anode and this anode are the aluminium of thickness 0.01-1 micron.
3. field emission display board according to claim 1 and 2, bar shaped negative electrode (8) is originally as the material that can produce the field-causing electron emission, or with place, bar shaped grid crosspoint or its all surfaces the material that can produce the field-causing electron emission is arranged thereon, comprise the little point of various conductions, diamond thin, graphite or CNT (carbon nano-tube).
4. field emission display board according to claim 1 is followed successively by bar resistor layer (10) and emission layer (9) on the bar shaped negative electrode (8); Resistive layer (10) can limit the cathode emission electric current, to improve the consistency of whole screen emission; Emission layer (9) comprises the little point of various conductions, diamond thin, graphite or CNT (carbon nano-tube) for producing the material of field-causing electron emission.
5. field emission display board driving method, it is characterized in that: the high pressure by anode makes negative electrode produce the field-causing electron emission, and stops negative electrode to produce field-causing electron to launch and show required image by apply the voltage that is lower than negative electrode on the grid that is embedded under the negative electrode.
6. a kind of field emission display board driving method as claimed in claim 5, its working method is as follows: apply fixedly high pressure on anode, be generally hundreds of to several ten thousand volts, it is when grid is the field emission of permission negative electrode that its voltage amplitude requires, usually grid is identical with cathode potential or close, and negative electrode field-causing electron emission reaches and shows required peak value; And work as grid for forbidding the negative electrode field emission, and grid potential is lower than cathode potential usually, and the emission of negative electrode field-causing electron ends.Grid is carried out addressing line by line, and the grid of selected line correspondence applies the high potential remaining row and applies electronegative potential, applies on the negative electrode and the corresponding pulse of required display image, and when needing to show on institute's respective column, corresponding cathode potential is identical with the grid high potential or close; And the cathode potential of correspondence is higher than the grid high potential negative electrode field emission is ended when do not have showing on institute's respective column; Width or number by pulse on the control cathode realize that gray scale shows.So line by line, circulation can realize that video shows frame by frame.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02131144 CN1402301A (en) | 2002-10-11 | 2002-10-11 | Field emission display board and driving method thereof |
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| CN 02131144 CN1402301A (en) | 2002-10-11 | 2002-10-11 | Field emission display board and driving method thereof |
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| CN1402301A true CN1402301A (en) | 2003-03-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387102C (en) * | 2004-04-20 | 2008-05-07 | 东元奈米应材股份有限公司 | Field emission display having luminance compensation structure and manufacturing method thereof |
| CN100399496C (en) * | 2003-08-05 | 2008-07-02 | 东南大学 | Field emission display board and driving method |
| CN102074441A (en) * | 2010-12-22 | 2011-05-25 | 清华大学 | Field-emission cathode device and field-emission display |
-
2002
- 2002-10-11 CN CN 02131144 patent/CN1402301A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100399496C (en) * | 2003-08-05 | 2008-07-02 | 东南大学 | Field emission display board and driving method |
| CN100387102C (en) * | 2004-04-20 | 2008-05-07 | 东元奈米应材股份有限公司 | Field emission display having luminance compensation structure and manufacturing method thereof |
| CN102074441A (en) * | 2010-12-22 | 2011-05-25 | 清华大学 | Field-emission cathode device and field-emission display |
| CN102074441B (en) * | 2010-12-22 | 2012-11-21 | 清华大学 | Field-emission cathode device and field-emission display |
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