CN1805105A - Field emission display device in separated structure - Google Patents
Field emission display device in separated structure Download PDFInfo
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- CN1805105A CN1805105A CN 200510124584 CN200510124584A CN1805105A CN 1805105 A CN1805105 A CN 1805105A CN 200510124584 CN200510124584 CN 200510124584 CN 200510124584 A CN200510124584 A CN 200510124584A CN 1805105 A CN1805105 A CN 1805105A
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- glass substrate
- ito glass
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Abstract
The invention relates to a separated field emission display device, which comprises a glass basic plate and the three primary colors fluorescent powder and aluminum film mounted on the glass basic plate. Wherein, there is a sealed vacuum chamber between the glass basic plate and the ITO glass basic plate; the aluminum film and the ITO glass basic plate are individually connected to the anode and cathode of direct current and high voltage; the ITO glass basic plate is plated with a photo-electric cathode array; the liquid crystal light valve is mainly formed by a upper ITO glass basic plate with directional layer, a liquid crystal layer and a lower ITO glass basic plate with directional layer, while the lower end of said liquid crystal light valve has a negative light source of light-emitting diode. The invention uses the electric beam to impact the fluorescent powder, the liquid crystal light valve and the negative light source, therefore, it has the energy saving, portable and better display properties of CRT and plane display, and compared to the surface conductive electric emitting display, it can avoid the preparation of nanometer slit to reduce the difficulty of technique and process.
Description
Technical field
The invention belongs to the field emission display device in flat panel display field, be specifically related to a kind of field emission display device of separated structure.
Background technology
Along with the day by day raising of people to the vision requirement, Display Technique is also fast-developing thereupon, show that from cathode-ray tube display (CRT), liquid crystal display (LCD), plasma (PDP) shows (FED) to ORGANIC ELECTROLUMINESCENCE DISPLAYS (OLED) and electroluminescent, cathode-ray tube display (CRT) exists that volume is big, power consumption is high and the shortcoming of radiativity, loses the dominance in demonstration field gradually; And flat panel display is described as a kind of Chaoyang technology, is the main flow of 21st century Display Technique development, thereby has been subjected to people's extensive attention, and it not only will have perfect display quality, and needs at volume, aspect such as energy-conservation more improvement is arranged.LCD, PDP and OLED are three big main flows of flat panel display, but all can't satisfy simultaneously aspect threes such as color, contrast, brightness, power consumption, size and life-spans, so a kind of new technology of flat-surface conductive electronics lift-off technology (SED) has been born at this point.The SED demonstration is another the big rising flat panel display after liquid crystal display and plasma demonstration, is considered to one of present state-of-the-art Display Technique.
The SED Display Technique, it is a kind of Field Emission Display, it is in the same place by inserting fixedly the separator Vacuum Package betwixt by anode glass substrate and cathode glass substrate, conduction electron between the seam that forms by tunnel effect on the cathode base, under the anode voltage effect, some electronics can arrive anode substrate, because the interpolar accelerating voltage is very high, electronics has very high kinetic energy, the light-emitting phosphor on the bombardment anode substrate; It adopts electron bombard fluorescent material from main light emission and display image.The brightness of SED is suitable with the screen of high-end CRT TV, but required power consumption has only traditional C RT half, and its size is usually all more than 40 cun, and thinner than present flat-panel screens; Scientist thinks that SED is the final form of CRT at present.The key of SED display is the slit between the miniature electron emitters, this slit has only the width of several nanometers, have only and form such slit and just can produce tunnel effect applying under the voltage condition, thereby make the reflector emitting electrons, luminous thereby electronics clashes into fluorescent material under the effect of voltage.But the preparation technology of nano slit is not only complicated, and has certain technical difficulty, has restricted the promotion and application of Surface-conduction Electron-emitter Display to a great extent; Only arrive certain level in nano science and semiconductor technology evolves, this problem just can satisfactorily resolve.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of long service life is provided, operating voltage is low, energy consumption is little, and cost is low, the field emission display device of the separated structure of high brightness and high resolution degree.
For achieving the above object, the technical solution used in the present invention is: comprise glass substrate and be arranged on three primary colors fluorescent powder array and aluminium film on the glass substrate inner surface, be characterized in, lower end at glass substrate is provided with ito glass substrate, form the vacuum chamber of a sealing between glass substrate and the ito glass substrate, aluminium film and ito glass substrate respectively with high direct voltage just, negative pole links to each other, go back evaporation on the ito glass substrate photocathode array is arranged, the downside of ito glass substrate is disposed with by the last ito glass substrate that has oriented layer, liquid crystal layer and the liquid crystal light valve that the following ito glass substrate that has oriented layer constitutes also are provided with backlight in the lower end of this liquid crystal light valve.
Another characteristics of the present invention are: the thickness of vacuum chamber is 1～6 millimeter; The thickness of aluminium film is 1～1000 nanometer; The photocathode array is corresponding one by one with the position of three primary colors fluorescent powder array; Backlight is made of light-emitting diode, and the light wavelength that this diode sent is gone into the material energy gap E that is adopted with the photocathode array
gBetween must satisfy following relation: λ≤1.24/E
g(μ m).
The present invention combines the principle and the structure of cathode-ray tube display (CRT) and liquid crystal display (LCD), structure, liquid crystal light valve and the back light source in LED of beam bombardment fluorescent material have been adopted, therefore this device is in the display quality of having inherited the CRT excellence and the light energy-conservation advantage of flat-panel display device, abandoned also that the CRT volume is big, the not good shortcoming of intense radiation and LCD luminosity, contrast and visual angle; With respect to surface-conduction-electron emission display, there is not the preparation problem of nano slit in it, and this greatly reduces technology and technologic difficulty to a great extent.
Description of drawings
Accompanying drawing is an overall structure schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to accompanying drawing, the present invention includes glass substrate 1 and be arranged on three primary colors fluorescent powder array 2 on glass substrate 1 inner surface and aluminium film 3 that thickness is 1～1000 nanometer, be provided with ito glass substrate 6 in the lower end of glass substrate 1, thickness of formation is 1～6 millimeter vacuum chamber 4 between glass substrate 1 and the ito glass substrate 6, aluminium film 3 and ito glass substrate 6 respectively with high direct voltage just, negative pole links to each other, go back evaporation on the ito glass substrate 6 photocathode array 5 is arranged, photocathode array 5 is corresponding one by one with the position of three primary colors fluorescent powder array 2, the downside of ito glass substrate 6 is disposed with by the last ito glass substrate 7 that has oriented layer, the liquid crystal light valve of liquid crystal layer 8 and following ito glass substrate 9 formations that have oriented layer, also be provided with the backlight 10 that constitutes by light-emitting diode in the lower end of this liquid crystal light valve, and the material energy gap E that adopted of the light wavelength λ that this diode sent and photocathode array 5
gBetween must satisfy following relation: λ≤1.24/E
g(μ m).
Its displaying principle is: back light source in LED 10 sends the light of certain wavelength, the exiting side luminous flux phi is subjected to the modulation of liquid crystal light valve in the transmission course of light, the final photon bombardment photocathode array 5 that arrives vacuum chamber 4 lower glass substrate 6 places is because photon wavelength λ satisfies: λ≤1.24/E
g(μ m), wherein E
gBe the photocathode energy gap, thereby meet the photoelectric emission condition, the electron beam outgoing of certain intensity is arranged at the opposite side of photocathode array 5, electron beam intensity i=S Φ, wherein S is the optical responsivity of photoelectric material, and Φ is a luminous flux, owing to be added with high direct voltage between the upper and lower glass substrate of vacuum chamber 4, electronics penetrates the three primary colors fluorescent powder array 2 of very thin aluminium film 3 bombardment glass substrates 1 under the highfield effect, thereby realizes luminous demonstration.
Basic display principles of the present invention is identical with CRT, all is luminous by the electronic impact fluorescent material, but the mode of electronics emission, bombardment is different.The CRT picture tube is that the electron beam that the hot-cathode electric rifle penetrates is departed from original direction under the strong magnetic field of deflecting coil, removes the impact fluorescence material successively; The present invention will scribble the glass substrate 1 of three primary colors fluorescent powder array 2 and ito glass substrate 6 laid parallels that evaporation has photocathode array 5, and a large amount of micro photo electric cathode electronics emission sources is just as the pixel of liquid crystal or plasma display.The key of this display is that photocathode array 5 can be launched electron beam under the bombardment of the certain wavelength photon that is subjected to the liquid crystal light valve modulation, liquid crystal light valve is modulated the luminous flux that back light source in LED 10 sends under the control of picture intelligence, and then obtain desired impact fluorescence powder electron beam intensity, reach good display effect.Structurally, the present invention is different fully with CRT again; CRT is the demonstration of being responsible for whole screen with one group of electron gun, so electron gun must could generate a complete picture in the mode of scanning; And the present invention is actually the electron gun microminiaturization, and making each pixel is photocathode to three miniature electronic rifles should be arranged all, realizes dynamic demonstration by the matrix addressing mode.
Claims (5)
1, a kind of field emission display device of separated structure, comprise glass substrate [1] and be arranged on three primary colors fluorescent powder array [2] and aluminium film [3] on glass substrate [1] inner surface, it is characterized in that: be provided with ito glass substrate [6] in the lower end of glass substrate [1], form the vacuum chamber [4] of a sealing between glass substrate [1] and the ito glass substrate [6], aluminium film [3] and ito glass substrate [6] respectively with high direct voltage just, negative pole links to each other, go back evaporation on the ito glass substrate [6] photocathode array [5] is arranged, the downside of ito glass substrate [6] is disposed with by the last ito glass substrate [7] that has oriented layer, liquid crystal layer [8] and have the liquid crystal light valve that the following ito glass substrate [9] of oriented layer constitutes also is provided with backlight [10] in the lower end of this liquid crystal light valve.
2, the field emission display device of separated structure according to claim 1 is characterized in that: the thickness of said vacuum chamber [4] is 1～6 millimeter.
3, the field emission display device of separated structure according to claim 1 is characterized in that: the thickness of said aluminium film [3] is 1～1000 nanometer.
4, the field emission display device of separated structure according to claim 1 is characterized in that: said photocathode array [5] is corresponding one by one with the position of three primary colors fluorescent powder array [2].
5, the field emission display device of separated structure according to claim 1, it is characterized in that: said backlight [10] is made of light-emitting diode, and the material energy gap E that adopted of the light wavelength λ that this diode sent and photocathode array [5]
gBetween must satisfy following relation: λ≤1.24/E
k(μ m).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101245844A CN100433235C (en) | 2005-12-20 | 2005-12-20 | Field emission display device in separated structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101245844A CN100433235C (en) | 2005-12-20 | 2005-12-20 | Field emission display device in separated structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1805105A true CN1805105A (en) | 2006-07-19 |
| CN100433235C CN100433235C (en) | 2008-11-12 |
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| CNB2005101245844A Expired - Fee Related CN100433235C (en) | 2005-12-20 | 2005-12-20 | Field emission display device in separated structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4343412A1 (en) * | 1993-12-18 | 1995-06-22 | Basf Ag | Electroluminescent devices |
| JP2005071705A (en) * | 2003-08-21 | 2005-03-17 | Toshiba Corp | Image display device |
| CN2852379Y (en) * | 2005-12-20 | 2006-12-27 | 陕西科技大学 | Field-emission display with separating type structure |
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2005
- 2005-12-20 CN CNB2005101245844A patent/CN100433235C/en not_active Expired - Fee Related
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