TWI353002B - A field emission device and a field emission displ - Google Patents

Description

1353002 Modified on March 18, 100, the following is a description of the invention: [Technical field] [0001] The present invention relates to a field emission device and a field emission display having the same [previous technique] [certification] field emission display Following the cathode ray tube (CRT) display and liquid crystal (LCD) display, the next generation of emerging displays with the most potential development. Compared with the existing display, the field emission display has the advantages of good display effect, large viewing angle, low power consumption and small volume, especially based on the field emission display of the carbon nanotubes, that is, the carbon nanotube field emission display (CNT-FED) In recent years, it has received more and more attention. [0003] Nano carbon tube is a new type of carbon material, which was discovered by the researcher I丨j丨ma.. ' ' . 1991 Found 'see "Helical Microtubules of Graphitic Carbon", Iijima, Nature, vol. 354, P56 C1991). The carbon nanotubes have excellent electrical conductivity, and the tip surface of the tip surface is almost close to the theoretical limit. The smaller the surface area, the larger the field strength factor, and the local electric field sound intensity:). Therefore, the carbon nanotube system is known. The best field emission material, which has a very low field emission on-state electric field (about 2 volts/micron), can transmit extremely large emission current density, and has extremely stable emission current, making it ideal for use as a field emission display emitter. [0004]

In general, the structure of a field emission display can be divided into a two-pole and three-pole sanctuary-polar type, that is, a field emission structure including an anode and a cathode. Please refer to the US Patent No. 6 published on September 1st, 2GQ2. , 448, 709. This, the structure is required to apply high voltage, and the uniformity and the cost of electron emission and manufacturing circuit are basically not suitable for high resolution. 093133748 Form No. A0101 Page 4 / Total 23 Page 1003091362-0 1353002 [0005] [ 0006] [0007] [0008] 093133748 | March 18, 100 ^^^| The practical application of the Jie. The tripolar structure is based on the improvement of the dipole type. The addition of the thumb pole to control the electron emission enables electrons to be emitted at a lower voltage and the electron emission is easily controlled by the gate. 4 Referring to the first figure, a three-pole field emission flat panel display as disclosed in U.S. Patent No. 6,617,798, issued on Sep. 9, 2003, which is incorporated herein by reference. The electron emitter μ, the grid 6 (the gate electrodes 20 and 34 are formed on the upper and lower surfaces), and the panel 1〇, wherein the back panel 8, the grid 6 and the panel 10 are supported by the barrier walls 2 and 4 and are separated by a certain distance. A plurality of through holes 6a are formed in the grid 6, and the panel 1 includes an anode layer and a county layer. The _ pole, the gate electrodes 20, 34 and the cathode 16 are electron-extracted and passed through the through hole 6a, and then accelerated to the anode and the phosphor layer by the electric field formed by the anode, and the excitation phosphor layer emits visible light. However, in the above-mentioned field emission display, the sinus is formed on the cathode layer 16 of the plane, and the phase (m) is near, and the field mask effect is very strong, so that the predetermined current is required to be emitted, and the intensity is large, which is disadvantageous for reducing the field emission. The cost of the display. SUMMARY OF THE INVENTION The first technical problem to be solved by the present invention is to provide a field emission device in which the field mask effect is weak between electron emitters. A second technical problem to be solved by the present invention is to provide a field emission display having the above field emission device. The technical solution of the present invention to solve the above first technical problem is to provide a form number A0101, a fifth page, a total of 23 pages, 1003091362-0 [0009] 1353002, a March 18th, 100th shuttle replacement page field transmitting device, including &gt a substrate, a plurality of cathodes formed on the substrate, and a plurality of electron emitters formed on the surface of the cathode, wherein a cathode surface on which the plurality of electron emitters are formed is a convex curved surface. [0010] Further, the cathode is a cylindrical wire fixed on the substrate. [0011] Further, a metal film is formed on both ends of the wire, and the wire is fixed on the metal film.

[0012] The first technical solution of the present invention to solve the above second technical problem is to provide a field emission display comprising a field emission device, an anode and a gate between the two, the field emission device comprising a substrate, a plurality of cathodes formed on the substrate and a plurality of electron emitters formed on the surface of the negative surface, wherein the cathode surface on which the plurality of electron emitters are formed is a convex curved surface. [0013] Further, the cathode is a cylindrical wire fixed on the substrate.

[0014] Further, a metal film is formed on both ends of the wire, and the wire is fixed on the metal film. [0015] The second technical solution of the present invention to solve the above second technical problem is to provide a field emission display comprising a field emission device, an anode and a gate, the field emission device comprising a substrate formed on one side of the substrate a plurality of cathodes on the surface and a plurality of electron emitters formed on the surface of the cathode, the anode being located on a side of the electron emitter and spaced apart therefrom, the gate being located on the back side of the substrate and insulated from the cathode, wherein a plurality of electrodes are formed The cathode surface of the electron emitter is a convex curved surface. [0016] Further, the cathode is a cylindrical wire fixed on the substrate. 093133748 Form No. A0101 Page 6 of 23 1003091362-0 1353002 - Corrected replacement page on March 18, 100 [0017] Further, a metal film is formed on both ends of the wire, and the wire is fixed on the metal film . [0018] Compared with the prior art, the present invention has the following advantages: the cathode surface is a convex curved surface, so that a plurality of electron emitters formed on the surface are distributed in a divergent manner, so that between the tips of adjacent electron emitters As the distance increases, the field mask effect is weakened, so that the electric field strength required to obtain the same current is reduced, and the driving cost can be reduced. [0019] A further advantage is that the wire is easy to realize mass production and the cost is reduced; the metal film is formed at both ends of the wire, which can better fix the wire and facilitate the extraction of the cathode from the device. [0020] [Embodiment] 4' The following description of the present invention provides an i field emission display in conjunction with the accompanying drawings: [0021] As shown in the second figure, an exploded view of the field emission display provided by the first embodiment of the present invention The field emission display device includes a field-emitting device 100, an anode plate 300, and a thumb-and-fork plate 20 0 therebetween, wherein the field emission device 100 includes an insulating glass substrate 101, and the metal film 102 formed on the substrate 101 The wire 103 fixed to the metal film 102 at both ends, and the electron emitter 104 standing substantially perpendicularly on the surface of the wire 103. The metal wire 103 is a cathode. The electron emitter 104 includes a carbon nanotube, a diamond, a nanowire, a metal tip, and the like. [0022] In this embodiment, the electron emitter 104 is a carbon nanotube. The carbon nanotube may be grown on the surface of the wire 103 by chemical vapor deposition, or may be formed on the surface of the wire 103 by electrophoresis or the like. The axial direction of the carbon nanotubes 093133748 Form No. A0101 Page 7 / Total 23 pages 1003091362-0 1353002 On March 18, 100, the shuttle replacement page is basically the same as the normal direction of the surface of the wire 103, ie nano carbon The tube is substantially perpendicular to the surface of the wire 103.

[0023] The wire 103 may be a wire such as a gold wire, a nickel wire or a stainless steel wire, and has a diameter of 10 micrometers to several hundreds micrometers, and may be specifically selected according to actual needs. In the present embodiment, a nickel wire was used, and the diameter was 50 μm. The wire 103 is cylindrical, and the surface on which the electron emitter 104 is formed refers to a cylindrical side surface, the surface is a curved surface, and the electron emitters 104 standing substantially perpendicularly on the surface are distributed in a divergent manner, adjacent thereto. The tips of the electron emitters 104 are separated from each other, and the field mask effect is weak, so that the electric field strength required to obtain the same current is lowered, thereby reducing the driving cost. [0024] The metal film 102 formed on the substrate 101 is the same material as the wire 103, and both ends of the wire 103 can be soldered to the metal film 102 by spot welding to fix the wire 103, and the metal film 102 also serves as a cathode. Wiring head · Take the cathode out of the device. [0025] In addition, a thin glass paste may be formed on the surface of the substrate 101.

The wire 103 is directly fixed on the substrate 〇1, and the ends of the wire 103 are extended to directly serve as a cathode lead. Of course, in the case where the wire 103 is fixed by the glass paste, the metal film 102 can be further provided with the both ends of the wire 103 fixed, and the wire 103 can be fixed more firmly. In addition, the substrate 101 is further provided with a barrier wall 105 composed of an insulating material distributed between adjacent wires for supporting the gate plate 200 and separating the gate plate 200 from the field emission device 100. Open a certain distance and insulation. The barrier wall 105 can be formed by a conventional screen printing method, and its shape can be a long strip as shown in the second figure, but it can also be a plurality of cylinders, and the shape is not 093133748. Form No. A0101 Page 8 of 23 Page 1003091362-0 1353002 __ Corrected the replacement page limit on March 18, 100. It consists of an insulating material that can support the grid plate and separate the grid plate from the field emission device by a certain distance. In the present embodiment, transparent glass is used as the barrier wall 1〇5. [0028] [0028]

Referring to the third figure, in the embodiment, the gate plate 200 includes a carrier plate 201 and a gate electrode 202 distributed on the surface of the carrier plate 201. The gate electrode 202 is a strip-shaped metal film. The carrier plate 201 and the gate electrode 202 are formed thereon. The plurality of through holes 203' are uniformly distributed in an array. The through hole 203 is a pixel hole of a field emission display. Electrons emitted from the electron emitter 104 can be emitted to the anode plate 300 through the through hole 203. When assembled, the grid plate 200 is distributed with one side of the gate 202 to be connected to the field emission device 10A, and the strip gate 202 is perpendicular to the wire 103 / \4 : ^$ Please refer to the fourth figure, in this embodiment i Yang: pole 1 'plate '3 〇 (Τ ® ® plate 301, anode 302 and fluorescent layer 303 formed on the surface of the anode 302, the fluorescent layer 303 is composed of a plurality of matrix blocks 'each small piece and grid plate The position of the through hole 2〇3 on the 〇〇2 corresponds to the position of the through hole 2〇3. When assembled, the 丨 屡 _ layer 3 is called the side of the butt grid plate 200, and the insulating barrier wall is used, and the anode plate is 3 〇〇 The distance between the anode plate 300 and the gate plate 2 is 间隔. ·=·- T- '•i...- ·.

[0029] Finally, as shown in the fifth figure, the side wall 600 and the side wall 7〇〇 connect, support and seal the field emission device 100, the grid plate 20Q and the anode plate 3 to form an internal vacuum space, thereby forming an internal vacuum space. Form the device. In use, different voltages are applied to the metal film 102 (ie, the cathode terminal), the gate 2〇2, and the anode 302. The electron emitters 1〇4 emit electrons, and the electrons pass through the through holes 203 and are bombarded by the electric field of the anode. To the fluorescent layer 3〇3 to make it emit light 1003091362-0 093133748 Form No. A0101 Page 9 / Total 23 Page 135302 [0030] 100 March 18th Nuclear replacement page as shown in the sixth figure, the second invention The field emission display exploded view of the embodiment includes a field emission device 110, an anode plate 300, and a gate plate 200 therebetween, wherein the field emission device 11 () includes an insulating glass substrate 101 formed on the substrate 101. A strip cathode 112, and an electron emitter 1〇4 formed on the surface of the strip cathode 112, the upper surface of the strip cathode Π2 is a convex curved surface 'electron emitter 1〇4 stands substantially perpendicularly to the surface. As can be seen from the figure, the both ends of the strip-shaped cathode U2 have a radial cross section which is curved. Of course, the sectional shape is not limited to the standard circular arc as long as the surface of the strip-shaped cathode 112 is curved and protrudes outward. The strip cathode 112 can be formed by a conventional method such as printing. Since the arc is convex toward the outside, the electron-emitting holes 104 formed perpendicularly on the surface thereof are distributed in a divergent manner, and the tips of the phase-neighboring electron emitters 104 are separated from each other, so that the electron emitter 1 〇 4 field mask effect is weaker' Obtaining the same current requires a reduction in the electric field/intensity of the cheese, which can reduce the driving cost. In addition, the substrate 101 is also provided with a barrier wall 11 5 composed of an insulating material, which is distributed between the adjacent wires, and is used to slap the plate 2 and make the grid plate 200 The field emission device 11:0 is separated by a certain distance and insulated. The resist, 'factory' partition 115 can be formed by a conventional screen printing method, and its shape is not limited. It is composed of an insulating material, can support the grid plate, and can separate the grid plate from the field emission device by a certain distance. In the embodiment, the material of the barrier wall 115 is transparent glass, and a plurality of columnar bodies are formed, which are distributed on the substrate 111 between the adjacent strip cathodes 112, as shown in the fourth figure. The gate plate 2 〇〇 and anode plate 3 〇〇 structure of the field emission display in this embodiment and its assembly are the same as in the first embodiment. Further, for the first embodiment and the second embodiment, the field emission display form number A0101 is 10 pages/total 23 pages.

[0033] [0033] 093133748 gate 1003091362-0 1353002 March 18, 100 can be further improved by replacing the page plate: [0034] Referring to the seventh figure, the grid plate 400 includes The carrier plate 201 has a first gate 202 distributed on a first surface of the carrier plate 201 and a second gate 4〇1 formed on a second surface opposite to the first surface. The first gate 2〇2 is a strip-shaped metal film, which is the same as that shown in the third figure. When installed, the first gate 202 is close to the field emission device. In use, the first gate 202 provides a potential to excite electrons; The pole 401 is an integral thin metal layer which is mounted close to the anode when it is used to control the direction of electron emission, and has a focusing effect to improve the brightness and resolution of the field emission display. Similarly, a plurality of through holes 203 are formed in the carrier plate 201, the gate electrode 202, and the second gate electrode 401, and the through holes 2〇3 are evenly distributed in an array. The sputum is for the pixel of the read emission display. The electron emitter emits the via 2 〇 3 and is emitted onto the anode plate 300. '... [0035] In addition, as shown in the eighth figure, the second gate 501 of the gate plate 500 is a strip-shaped metal thin film. The strip-shaped second gate hetero 2 2 is distributed perpendicularly or parallel to each other. The second grid 5〇1 is the same as the _•. 梓 梓 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党 党[0036] The field emission device of the present invention is also applicable to a back-gate field emission display, which includes a field emission device, an anode, and a gate, the field emission device including a substrate and a plurality of cathodes formed on one surface of the substrate. And a plurality of electron emitters formed on the surface of the cathode. The anode is located on a side of the electron emitter and spaced apart therefrom. The gate is located on the back side of the substrate and is insulated from the cathode. The cathode of the plurality of electron emitters is formed therein. Surface. It is a convex surface. 093133748 Form nickname A0101 Page 11 of 23 1003091362-0 1353002 100 years of July I8 correction replacement acres [0037] The back gate type field emission display and the first embodiment and the second embodiment described above Compared with the remote control gate field emission display, the difference is that the gate is a metal film formed on the back side of the field emission device substrate, and there is no need to form a pixel hole, and the anode structure and the field emission device structure are not substantially different. In summary, the field emission display field mask effect provided by the present invention is weakened, so that the electric field strength required to obtain the same current is reduced, the driving cost can be reduced, the resolution is high, and mass production can be performed, which is suitable for practical applications.

BRIEF DESCRIPTION OF THE DRAWINGS [0039] The first figure is an exploded view of a prior art three-pole field emission display. [0040] The second drawing is an exploded view of the field emission display of the first embodiment of the present invention. [0041] The third figure is a schematic diagram of a grid plate in a field emission display of the present invention. [0042] The fourth figure is a perspective view of the anode plate of the field emission display of the present invention. [0043] The fifth figure is a stereoscopic display of the field emission display package of the first embodiment of the present invention.

t map. :r: m: -.- [0044] The sixth figure is the second embodiment of the present invention. [0045] The seventh figure is a perspective view of a second type of grid plate of the present invention. [0046] The eighth figure is a perspective view of a third type of grid plate of the present invention. [Main component symbol description] [0047] Field emission device 100 Insulating glass substrate 101 [0048] Metal film 102 wire 103 093133748 Form number Α 0101 Page 12 of 23 1003091362-0 1353002

Modified replacement page [0049] electron emitter 104 barrier wall 105 [0050] field emission device 110 substrate 111 [0051] strip cathode 112 barrier wall 115 [0052] grid plate 200 carrier plate 201 [0053] First Gate 202 Through Hole 203 [0054] Anode Plate 300 Panel 301 [0055] Anode 302 Camp Light Layer 303 [0056] Gate Plate 400 Second Gate 401 Second*; '- [0057] Gate Plate 5 0 0 Bridge 501 & Shout /:, '-.Τ: ?ί!·Λ/?· Continued [0058] Sidewall 600 Sidewall 700

093133748 Form No. A0101 Page 13 of 23 1003091362-0

Claims (1)

1353002 ι__ Amendment to the vibration page on March 18, 2010. Patent application scope: 1. A field emission device comprising: a substrate; a plurality of cathodes formed on the substrate; and a plurality of electron emission formed on the surface of the cathode Body, the improvement is that the cathode surface on which the plurality of electron emitters are formed is a convex curved surface 2. The field emission device of claim 1, wherein the plurality of electron emitters are substantially perpendicular to the surface of the cathode and are distributed in a divergent manner. 3. The field as recited in claim 1 The launching device is modified in that the cathode is a cylindrical wire. 4. The field emission device of claim 3, wherein the wire comprises gold wire, stainless steel wire or nickel wire. 5. The field emission device of claim 3, wherein the wire is from 10 micrometers to hundreds of meters in diameter. 6 is as described in claim 3 of the patent field. Metal iridium is formed on both ends of the wire and on the surface of the substrate, and both ends of the wire are fixed on the metal film. 7. The field emission device according to any one of claims 3 to 6, wherein the substrate is formed with a layer of glass material, and the wire is fixed to the substrate through the glass paste. 8. The field emission device of claim 1, wherein the cathode is a strip-shaped metal film having a curved cross section in a radial shape. 9. The field emission device according to item 1 of the patent application, the improvement is that the 093133748 form number A0101 page 14 / 23 pages 1003091362-0 1353002 - 100 years of March 18th nuclear replacement page - multiple Electron emitters include carbon nanotubes, diamonds, Shih Nylon or metal! 10. A field emission display, comprising: a field emission device comprising a substrate, a plurality of cathodes formed on the substrate, and a plurality of electron emitters formed on the surface of the cathode; an anode; and one of the two Gate, • the improvement is that the cathode surface on which a plurality of electron emitters are formed is a convex curve Face 11 The field emission display as described in claim 10 of the patent application section. The plurality of electron emitters substantially check the stomach 12 cloth.改善 The improvement described in the patent application scope is in the form of a divergence. The improvement is that the cathode is a cylindrical wire. 13. The field emission display of claim 12, wherein the wire comprises a gold wire, a non-mineral W鲧13⁄4 feeling 14. The apparatus of claim 12, wherein the wire has a diameter of from 10 micrometers to a number of hundred and fifteen. The field emission display of claim 12, wherein The improvement is that both ends of the wire and a metal film are formed on the surface of the substrate, and both ends of the wire are fixed to the metal film. The field emission display according to any one of claims 12 to 15, wherein the glass substrate is formed with a glass paste, and the wire is fixed to the substrate through the glass paste. 17. The field emission display of claim 10, wherein the cathode is a strip-shaped metal film having a curved arcuate cross section. 093133748 Form No. A0101 Page 15 of 23 1003091362-0 1353002 On March 18, 100, the shuttle is replacing the mu 18. The field emission display of claim 10 is improved in the plurality of electron emitters. Including carbon nanotubes, diamonds, Shinai nanowires or metal tips. 19. The field emission display of claim 10, wherein the gate comprises a carrier plate, and the gate is formed on the surface of the carrier plate adjacent to the field emission device. 20. The field emission display of claim 19, wherein the carrier plate is formed with a second gate adjacent to the surface of the anode. 21. The field emission display of claim 20, wherein the second gate is a strip metal film or an integral metal film overlying the carrier plate. 22. A field emission display, comprising: a field emission device comprising: a substrate, a plurality of cathodes formed on one surface of the substrate; and a plurality of electron emitters formed on the surface of the cathode; an anode located at the electron emission One side of the body is spaced apart from it by a distance; /SL. A gate, which is located on the back side of the substrate, is provided with a cathode, and the improvement is that the surface of the cathode on which the plurality of electron emitters are formed is a convex curved surface. A field emission display according to claim 22, wherein the plurality of electron emitters are disposed substantially perpendicularly to the surface of the cathode and are distributed in a divergent manner. 24. The field emission display of claim 22, wherein the cathode is a cylindrical wire. 25. The field emission display of claim 24, wherein the wire comprises a gold wire, a stainless steel wire or a nickel wire. 093133748 Form No. Α0101 Page 16 of 23 1003091362-0 1353002 » · 26 . 29 . The correction of the field of the field emission display of claim 24, wherein the wire has a diameter of from 10 micrometers to several hundred micrometers. The field emission display according to claim 24 is characterized in that both ends of the wire and a metal film are formed on the surface of the substrate, and both ends of the wire are fixed to the metal film. The field emission display of any one of claims 24 to 27, wherein the substrate is formed with a layer of glass paste through which the wire is fixed to the substrate. The field emission display of claim 22, wherein the cathode is a strip-shaped metal film having a curved cross section in a radial shape. 30. The field emission as described in claim 22, wherein the improvement is that the plurality of electron emitters comprises a nano-Heng/tube, a singular, a s. /V is a tip. , ' 093133748 Form Number Α0101 Page 17 of 23 1003091362-0