CN100399496C - Field emission display board and driving method - Google Patents
Field emission display board and driving method Download PDFInfo
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- CN100399496C CN100399496C CNB031496695A CN03149669A CN100399496C CN 100399496 C CN100399496 C CN 100399496C CN B031496695 A CNB031496695 A CN B031496695A CN 03149669 A CN03149669 A CN 03149669A CN 100399496 C CN100399496 C CN 100399496C
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Abstract
The present invention discloses a field emission display board and a driving method thereof. The present invention is mainly characterized in that a bar-shaped grid is positioned under a cathode, and the high voltage of an anode and the voltage of a modulating grid are used for enabling the cathode to generate field electron emission, and thus, the electron emission of each display unit is controlled to display an image. A plane auxiliary focusing electrode is used for preventing an electron beam from diffusing so as to enlarge the anode distance and increase the working voltage of the anode. Compared with the existing field emission display board, the present invention has the advantages of high resolution and luminous brightness and low manufacturing cost.
Description
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.
Background technology
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 go up to make anode 4a, fluorescent material 5a, is followed successively by bar shaped negative electrode 6a on the metacoxal plate 2a, the dielectric layer 7a of opening exposed portions serve negative electrode and perpendicular to the strip gab grid 8a of bar shaped negative electrode 6a.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 dielectric layer 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 6b 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, and loses the modulating action of grid; 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.
Summary of the invention
The invention discloses a kind of field emission display board and driving method thereof.Its principal character is that the bar shaped grid is positioned at the below of negative electrode, and high pressure by anode and modulation grid voltage make negative electrode produce the field-causing electron emission to launch display image with the electronics of controlling each display unit.Prevent the electron beam diffusion by the assisted focused electrode in plane, thereby can increase the anode distance, improve anode working voltage.The existing relatively field emission display board of the present invention has higher resolution and luminosity, 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 3, 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 0.1～50 micron local or the dielectric layer 7 that all covers bar shaped grid 6, makes bar shaped negative electrode 8 and the bar shaped assisted focused electrode 9 vertical with bar shaped grid 6 on dielectric layer 7 at interval.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 Vch, the grid low level is Vgl, high level is Vgh, applies fixedly high pressure Va on anode, is generally hundreds of to several ten thousand volts, its voltage amplitude requires to when grid being (grid potential is high level Vgh usually) when allowing the negative electrode field emission, and negative electrode field-causing electron emission reaches and shows required peak value; And when grid (grid potential is low level Vgl usually, is lower than negative electrode low level Vcl) when forbidding the negative electrode field emission, the emission of negative electrode field-causing electron ends.The assisted focused utmost point applies the level Vf that is lower than Vcl, and it act as: when negative electrode is emission state, prevent the electron beam diffusion; When negative electrode when forbidding emission state, cut off the anticathode influence of anode high voltage.Grid is carried out addressing line by line, and selected line applies high level Vgh, and remaining row 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. compare with traditional audion because negative electrode is made after grid, so field emission material is not subjected to the influence of grid technology, manufacturing process is simple, therefore, the present invention is suitable for producing in enormous quantities, improves rate of finished products, reduces production costs.2. 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.3. because the effect of the assisted focused utmost point in the field emission display board of the present invention has reduced the characteristic that electron beam defocuses in the back grid structure, therefore can increase the distance between the front-back baseboard and can not increase hot spot.Help improving anode working voltage and increase this distance, thereby allow to adopt the high high-pressure fluorescence powder of luminous efficiency to improve the luminous efficiency of device.
Description of drawings
Accompanying drawing 1 is traditional triode field emission display panel structure generalized section
Accompanying drawing 2 is an existing back grid triode field emission display panel structure profile
Accompanying drawing 3 is field emission display board structure chart of the present invention
Accompanying drawing 4 is the embodiment of the invention one sectional arrangement drawing
Accompanying drawing 5 is the embodiment of the invention two sectional arrangement drawings
Accompanying drawing 6 is the embodiment of the invention three metacoxal plate sectional arrangement drawings
Accompanying drawing 7 is field emission display board fundamental diagram of the present invention
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 prebasal plate glass 1c, metacoxal plate glass 2c subtend assembling as shown in Figure 4, the distance that is maintained fixed by supporter 3c array.Prebasal plate glass 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 0.1～50 micron part or the dielectric layer 7c that all covers bar shaped grid 6c, makes bar shaped negative electrode 8c and the bar shaped assisted focused utmost point 9c vertical with bar shaped grid 6c on dielectric layer 7c at interval.Wherein bar shaped negative electrode 8c is originally as the material that can produce the field-causing electron emission, or make the material 10c 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 7: apply fixedly high pressure on anode, be generally hundreds of to several ten thousand volts, its voltage amplitude requires to being (grid potential is higher than cathode potential) 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.The assisted focused utmost point applies the level Vf that is lower than Vcl, and it act as: when negative electrode is emission state, prevent the electron beam diffusion; When negative electrode when forbidding emission state, cut off the anticathode influence of anode high voltage.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 negative electrode is a low level; And the negative electrode of correspondence is a high level 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.
2. second kind of embodiment of the present invention assembled by prebasal plate glass 1d, metacoxal plate glass 2d subtend as shown in Figure 5, the distance that is maintained fixed by supporter 3d array.Prebasal plate glass 1d goes up and makes fluorescent material 5d, and thickness is 0.01～1 micron aluminium anodes 4d, 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 6d on the metacoxal plate glass 2d, thickness is 0.1～50 micron part or the dielectric layer 7d that all covers bar shaped grid 6d, makes bar shaped negative electrode 8d and the bar shaped assisted focused utmost point 9d vertical with bar shaped grid 6d on dielectric layer 7d at interval.Wherein bar shaped negative electrode 8d is originally as the material that can produce the field-causing electron emission, or make the material 10d 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 1d and the metacoxal plate glass 2d,, 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 6, the bar shaped negative electrode 8e of metacoxal plate goes up and makes bar resistor layer 11e, this resistive layer can limit the cathode emission electric current, to improve the consistency of whole screen emission, on bar resistor layer 11e, make the material 10e 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 1e and the metacoxal plate glass 2e, 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 (4)
1. a field emission display board is assembled by prebasal plate glass (1), metacoxal plate glass (2) subtend; The distance that is maintained fixed by supporter (3) array; Be followed successively by 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 0.1～50 micron part or the dielectric layer (7) that all covers bar shaped grid (6), goes up at dielectric layer (7) and makes bar shaped negative electrode (8) and the bar shaped focusing electrode (9) vertical with bar shaped grid (6) at interval; Bar shaped negative electrode (8) this as the material that can produce 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).
2. a field emission display board is assembled by prebasal plate glass (1), metacoxal plate glass (2) subtend; The distance that is maintained fixed by supporter (3) array; Be followed successively by fluorescent material (5) on the prebasal plate glass (1), thickness is that 0.01～1 micron aluminium anodes (4) covers fluorescent material (5); Be followed successively by bar shaped grid (6) on the metacoxal plate glass (2), thickness is 0.1～50 micron part or the dielectric layer (7) that all covers bar shaped grid (6), goes up at dielectric layer (7) and makes bar shaped negative electrode (8) and the bar shaped focusing electrode (9) vertical with bar shaped grid (6) at interval; Bar shaped negative electrode (8) this as the material that can produce 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).
3. field emission display board according to claim 1 and 2 is followed successively by bar resistor layer (11) and emission layer (10) on the bar shaped negative electrode (8); Resistive layer (11) can limit the cathode emission electric current, to improve the consistency of whole screen emission; Emission layer (10) is for producing the material of field-causing electron emission.
4. field emission display board according to claim 1 and 2, its working method is as follows: apply fixedly high pressure on anode, its amplitude is that hundreds of arrives several ten thousand volts, its voltage amplitude requires to being when allowing the negative electrode field emission when grid, 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, and the emission of negative electrode field-causing electron ends; The assisted focused utmost point applies the assisted focused voltage that is lower than cathode voltage; 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 negative electrode is a low level; And the negative electrode of correspondence is a high level when not having demonstration on institute's respective column, and the negative electrode field emission is ended; 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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| CNB031496695A CN100399496C (en) | 2003-08-05 | 2003-08-05 | Field emission display board and driving method |
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| CNB031496695A CN100399496C (en) | 2003-08-05 | 2003-08-05 | Field emission display board and driving method |
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| CN1481200A CN1481200A (en) | 2004-03-10 |
| CN100399496C true CN100399496C (en) | 2008-07-02 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102064071B (en) * | 2010-12-16 | 2012-07-18 | 清华大学 | Field emission display device |
| CN102074441B (en) * | 2010-12-22 | 2012-11-21 | 清华大学 | Field-emission cathode device and field-emission display |
| CN102262995B (en) * | 2011-06-27 | 2013-07-03 | 福州大学 | Planar grid surface conduction field emission cathode structure and manufacturing method thereof |
| US8519618B2 (en) * | 2011-08-30 | 2013-08-27 | Htc Corporation | Display |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1073090A2 (en) * | 1999-07-27 | 2001-01-31 | Iljin Nanotech Co., Ltd. | Field emission display device using carbon nanotubes and manufacturing method thereof |
| CN1402301A (en) * | 2002-10-11 | 2003-03-12 | 东南大学 | Field emission display board and driving method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1073090A2 (en) * | 1999-07-27 | 2001-01-31 | Iljin Nanotech Co., Ltd. | Field emission display device using carbon nanotubes and manufacturing method thereof |
| CN1402301A (en) * | 2002-10-11 | 2003-03-12 | 东南大学 | Field emission display board and driving method thereof |
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Granted publication date: 20080702 Termination date: 20120805 |