TW200540908A - Two-sided viewable field emission display - Google Patents

Abstract

A two-sided viewable field emission display is disclosed in this invention, which includes two parallel fluorescence screens and an electron emission structure located between the fluorescence screens. The two fluorescence screens have an identical structure, and each of them includes a transparent substrate with an anode and a fluorescence layer formed on a surface of the substrate. The electron emission structure includes an opaque insulating substrate with a number of row electrodes, a number of electron emission assembles and a number of column electrodes formed respectively on both surfaces of the insulating substrate facing the two fluorescence screens. In addition, the field emission display includes an interconnection of the electrodes to achieve simultaneous display at the two fluorescence screens. The field emission display exhibits merits of low driving voltage, controllable display, simple structure and low cost, and can be utilized as traffic signal board, large-scale spectacle display and surround cinema and so on.

Description

200540908

[Technology to which the invention belongs] The present invention provides a surface field emission display. Field] A flat-type double-sided display particularly relates to a dual ’[previous technology] complicated circuit, which easily results in poor reliability of the display, which is not conducive to practical application. Generally, the front and back sides of a flat-type display are suspended, and the back side can also be used as a flat display. A flat-panel display that can be displayed on both sides is used to make full use of the display space and achieve the goal of saving costs and improving display reliability. In recent years, the development of flat panel displays is a major platform for computers, mobile communications and consumer electronics. At present, the applications are more common (LCD), electro-polymer display (pdp), and so on. Among them, the field emission display and its indicators with higher contrast, wider viewing angle, shorter brightness, and wider operating temperature are displayed on the front, and the back does not show applications, such as traffic signs, circular cinemas, etc. Need to use two single-sided display boards on both sides at the same time for the opposite purpose. However, such a setup requires two rapid speeds. It has been widely used in personal products and other fields. It has become a flat display for information technology. There are liquid crystal display and field emission display ( FED) Compared with other flat-type displays, it has the advantages of higher power consumption, lower energy consumption, and better response. At present most flat type displays. However, in the case of large-scale panels displaying information display panels and displays in large-scale occasions, the traditional method is to achieve a set of drive systems that can be viewed from the front and back, which is "cost too south" and to achieve double-sided display, the Chinese Academy of Sciences Electronics China Patent Application No. 00133684.3 from the Institute of Technology of China discloses a double-sided field emission cathode vacuum microelectronic light-emitting device. Please refer to the first figure. The light-emitting device includes an anode lead

200540908

One ... Eight 丨 Go to the front and back. Both sides emit electrons column 2. Through the silicon tip array 2 two: to achieve the purpose of double-sided display, the distance between the anodes is 2 ~ 30 microelectronics field emission display. However, it is difficult to control the images displayed on both sides of the light device when used to display images ^ It is said that the two-sided display is opposite and the images are independent of each other. Therefore, the vacuum line 1, the cathode field emission Shi Xijian array 2, and the labor line 5 are used. Among them, an electrode is set between the two fluorescent screens 3, and the emitter of the cathode uses the Shi Xijian array to emit electrons to bombard the fluorescent screen 3 in front of it. Among them, the silicon tip array 2 and the fluorescent screen 3 meters require a higher driving voltage to achieve, and this direct double-sided display structure should be grayscale and brightness. In addition, this image is different, and the two-sided display image is a chiral object. In addition, the two emission chambers of the device need to be processed separately, which is not conducive to preparation. In view of this, it is necessary to provide a double-sided field emission display with low driving voltage, controllable display image, simple structure and low cost. : ... [Content] In order to overcome the shortcomings of high driving voltage, uncontrollable display image, complicated structure and high cost of the prior art double-sided field emission display, the present invention provides a low driving voltage, controllable display image, and simple structure. And into a low double-sided field emission display. & ^ In order to achieve the above object, the present invention provides a double-sided field emission display, which includes two fluorescent screens parallel to each other; and an electron emission structure located between the two fluorescent screens; the fluorescent screens each include a transparent substrate And an anode and a fluorescent layer formed on the surface thereof, the electron emission structure divides the internal space of the display into two parts, and includes an opaque insulating substrate having two opposite surfaces, which respectively face the two phosphors Light screen, said absolutely

200540908 V. Description of the invention (3) Two of the edge base and a plurality of columns are formed on the insulating surface or cathode; the micro-pointed body is exactly the same as that of the present invention, the insulation and the insulating base are driven by a set of holes, Convenient for display compared to the electrodes. The display surfaces of the electrodes are separated from each other. The electrodes of each row of the substrate can be further emitted from the field of the electron emission structure. The further substrate faces the bottom central axis system to realize the prior art screen structure inside the insulated indicator. The structure of the electrode is further reduced, and the same set of driving system is displayed on the screen [simple diagram, the first diagram, the second diagram, and the third diagram. The symmetrical electrode and the material include a cathode body selected from the light layer of the emitter. The improvement is that the two sides are symmetrical and the two-sided display substrate is drawn at the same time. The present invention is sufficient to reduce the field and column electricity, and there is an insulation layer between the multiple row electrodes and the electron emitter column electrodes. Ceramic material; two tables or grids of the insulating substrate, and the column electrodes are grid carbon nanotube arrays, silicon-tip arrays, or materials thereof, and electrons on each cathode are emitted from the dual row column electrodes, showing the same non-field Send a vacuum. The display of the dual-use display is connected to the emitter electrode via the shared image; the same cost. Explanation] The double-sided field emission display of the prior art is the field emission display of the present invention. Each electrode in the surface field emission display is electrically connected to each other, and each pair is electrically connected to each other, so that images can be acquired. A two-sided space with a three-screen display is formed in the emission edge area; coupled with the driving voltage, the result is that a two-sided display set driving system can be realized, saving a schematic diagram of the structure of the display unit. Schematic diagram of electrode connection of double-sided field emission display of the present invention

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The fourth figure is a column electrode diagram of a double-sided field emission display of the present invention.疋 "Small thoughts 5. Explanation of the invention (4) Figures; [Embodiment] The present invention will be described in further detail below with reference to the drawings.

A clear picture is shown in the second picture. The second picture is a display unit of the field emission display cry of the present invention, that is, a schematic diagram of a pixel structure including three primary colors (RGB). The entire display structure is composed of a large number of these pixel arrangements. This society has two axisymmetric glare screens 10 and 10; and an electron emission structure 20 which can emit electrons on both sides between the two phosphor screens σ. The fluorescent screen 10 includes a transparent substrate 11 (such as glass), an anode 12 formed on the surface of the transparent substrate 11, a fluorescent layer 13 formed on the anode 12, and an aluminum film 14 covering the fluorescent layer 13, and the fluorescent layer 13 There are three types, which respectively represent the three primary colors, namely red (Red), green (Green), blue (Biue) three fluorescent layers (not shown separately), each three fluorescent layers as a group, through their combination can be Various colors are displayed. The structure of the fluorescent screen 10 ′ is the same as that of the fluorescent screen, including a transparent substrate, an anode 12, a fluorescent layer 13 ', and an aluminum film 14. The electron emission structure 20 includes an opaque insulating substrate 28, and the material of the insulating substrate 28 includes a ceramic material, which has a first surface 281 and an opposite second surface 282, and faces the first surface 2 8 1 of the fluorescent screen 10 A plurality of cathodes 26 and a plurality of insulating layers 251 interposed therebetween are formed. An emitter 27 is formed on the cathode 26, and a gate 25 is formed on the insulating layer 251. Similarly, the same structure is formed symmetrically on the second surface 2 8 2 of the insulating substrate 28 facing the fluorescent screen 10, including the cathode 26, the emitter 27 ', the insulating layer 251', and the gate 25 '. Among them, the emitters 27, 27,

Page 11 200540908 V. Description of the invention (5) 'Don't face the fluorescent layer 1 3, 1 3' of the corresponding primary color, the emitters 2 7, 2 7 can use carbon nanotube array, silicon tip array, metal tip or Other field-emission materials with micro-tip structures, and the smaller tip of the disk nanotube array are more conducive to tip discharge, reduce the driving voltage of electron emission, and improve the accuracy of field emission. In addition, the 'electron emission structure 20 divides the internal space of the double-sided field emission display of the present invention into two parts, which are the front and rear emission cavities 3 1, 31'. On the edges of the emission cavities 31, 31, a sidewall 30 and 30. It and the front and rear fluorescent screens 10 and 10 ′ constitute the casing of the display. Here, the insulating substrate 28 plays a role of blocking light, and can eliminate the mutual influence of the front and back fluorescent layers 13, ι3, thereby forming two field emission regions that do not interfere with each other. Through-holes 29 are formed in the non-emission edge area of the insulating substrate 28. The through-holes 29 can be used to connect the two emission cavities 3 1 and 3 1 ′. Thus, during the preparation process, the two The launching cavities 3 1 and 3 1 ′ are evacuated, which does not need to be evacuated separately, reducing the complexity of the process. In addition, the through-holes 29 provided in the non-field emission edge region 'will not adversely affect the field emission and display effects. When the display is in operation, different voltages are applied simultaneously between the grid 25 and the cathode 26 and between the grid 25 and the cathode 26 ', so that the emitters 27 and 27 emit electrons respectively, and the electrons bombard the fluorescent light under the action of the electric field. The light layers 13 and 2 emit light, and the light emitted therethrough passes through the transparent insulating layer 11 ′ 11 to generate a picture ^ ′, which can achieve the effect of displaying images on both sides. Because the grid 25 ,, ==, can realize precise control of electron emission, and the emitter 27, can emit electrons at a lower voltage, thereby reducing the driving voltage of the electron emission and reducing energy consumption and cost Reduced accordingly.

Page 12 200540908 V. Description of the invention (6) Launch ‘-t ^ See the second and fourth figures, which are schematic diagrams of the double-sided field row and column connection of the present invention, respectively. Connection methods of the electrodes: Condition: One row electrode is the cathode, and the "pole is the grid: another :::: pole is the grid, and the column electrode is the cathode." In both cases, go to f: @ ， Here, the first case is taken as an example to explain in detail. 28 * 二 Τ 阴极 The cathode phase connection 'is about to be located in the row of the cathode 2 6 1 and the cathode 2 6 1 respectively, which are connected to the 2R through the line 3 2 ?, 4 Ϊ 2 Connect the two cathodes 262 in the second row on both surfaces of the insulating substrate 28, and then place the basins on the two surfaces of the insulating substrate 28 in order.

Connection (as shown in the third picture). As for the column gate, since people are used to press the left to right when viewing the image, the connection of the column gate = should connect the column poles on the two surfaces of the insulating substrate 28 about its central axis 2 'The gates 2 50 and 250 which are respectively located on the two sheets Z of the opaque insulating substrate 28 are connected through the line 3 2. Similarly, the gates are also connected in the same way (as shown in the fourth figure). . Then, the row 2 poles are connected in such a way that the same image can be displayed on both sides. % In addition, in order to display different images on both sides, two sets of drive systems can be used. The charging pole connection method uses independent front and back connection methods. The through-set drive system controls them separately to achieve positive and negative J display = Figure image. 1 different

‘·’ Not mentioned above ’The present invention complies with the requirements of the invention patent, and the patent is cleared according to law. However, the above is only a preferred embodiment of the present invention. Any modification or change made by those who know the skills of the present case in accordance with the spirit of the present invention should be included in the scope of patent application below. ,

Page 13 200540908 Brief description of the diagram The first diagram is a schematic diagram of the structure of a conventional double-sided field emission display in the prior art; the second diagram is a schematic diagram of the structure of a display unit of the field emission display of the present invention; Schematic diagram of row electrode connection of a display; FIG. 4 is a diagram of row electrode connection of a double-sided field emission display of the present invention. [Description of main component symbols]

Fluorescent screens 10, 10, transparent substrates 11, 11, anodes 12, 12, fluorescent layers 13, 13, aluminum films 14, 14, electron emission structures 20, thumb electrodes 25, 25, cathodes 26, 26, emitters 27, 27, insulating substrates 28, 28, through holes 2 9, 2 9, sidewalls 30, 30, emission cavities 31, 31, lines 32, 32, insulating layers 251, 251, insulating substrate first surface 281 insulating substrate second surface 282

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Claims (1)

200540908 VI. Scope of patent application1. A double-sided field emission display, which includes two glare screens parallel to each other; and an electron emission structure located between two phosphor screens; the phosphor screens each include a transparent substrate and formed on the phosphor screen. The anode and the fluorescent layer on the surface; the electron emission structure divides the internal space of the display into two parts, which includes an opaque insulating substrate having two opposite surfaces facing the two fluorescent screens, respectively : A plurality of row electrodes, electron emitters and a plurality of column electrodes are formed symmetrically on both surfaces of the insulating substrate, and an insulation layer is separated between each row electrode and the column electrode. 2 · The double-sided field emission display as described in item 1 of the scope of patent application, wherein each pair of the same row electrodes of the double-sided field emission display are symmetrically connected to each other about the insulating substrate, and each pair is about the central axis of the insulating substrate The symmetrical array of electrodes are electrically connected to each other. 3. The double-sided field emission display according to item 2 of the scope of the patent application, wherein the row electrode is a cathode, the column electrode is a grid, and the electron emitter is formed on the cathode. 4 · The double-sided field emission display according to item 2 of the scope of patent application, wherein the row electrode is a grid electrode, the column electrode is a cathode electrode, and the electron emitter is formed on the cathode electrode. 5. The double-sided field emission display according to item 3 or 4 of the scope of the patent application, wherein the cathode and the grid are formed at a distance from each other. 6. The double-sided field emission display according to item 1 of the scope of patent application, wherein a non-field emission edge region of the insulating substrate is formed with a through hole. 7. The double-sided field emission display as described in item 1 of the patent application scope, wherein the electron emitter is selected from a carbon nanotube array, a silicon tip array, or a metal micro 200540908 6. Scope of Patent Application Sharp-emitting materials. 8 · The double-sided field emission display as described in item 1 of the scope of patent application, the electron emitter on the mother cathode is corresponding to the corresponding fluorescent 9 · If the scope of patent application, the sign lies in the insulating substrate ^ i ^ ^ It is obvious that I η 1 person & Qin base materials include ceramic materials. 0 · As described in the patent application ^ ^ ^ ^ ^. The double-sided field of hair described by the member is ten-mouth mouth, and the marginal base is divided into 5 卩 卩 显 显 显 Ί, ^ ^ ^ ^ knife 丨The two parts of Yang Kai are Zhineng Zhuangneng II · If the patent application scope i is the king of resentment. The double-sided% emission display cryo-pi-amp display is known to use a drive system. Where its special where among Page 16