TWI250813B - Field emission display featuring dual screen - Google Patents

Abstract

The present invention relates to a field emission display featuring dual screen, which comprises a three-layered structure formed of two anode plates sandwiching a cathode plate. The cathode plate has cathode units disposed on both surfaces symmetrically, the two anode plates have the anode units corresponding to the cathode units respectively on the side facing the cathode plate. A spacer is formed between the anode plate and cathode plate, or a fixed spacing formed by packaging edge stripes is between the anode plate and cathode plate. When applying proper voltages between the anode unit and cathode unit, the cathode units on both sides of the cathode plate emit electron beams toward the two anode plates respectively, so as to form image on the two anode plates respectively.

Description

1250813

[Technical Field] The present invention relates to a field emission display capable of double-sided display, and more particularly to a double-sided display comprising a single cathode plate and two anode plates, which is equivalent to a two-independent field emission display to share a cathode The form of the board is combined into an integrated double-sided display. [Prior Art] Press, Field Emission Display (FED) is one of the emerging flat-panel displays in recent years. The reason is that it has the effect of self-illumination, without the need to use a separate backlight source, compared to LCDs. In addition to better brightness performance, plus a wider range of viewing angles, low power consumption, fast response (no residual image retention) and a wide operating temperature range, and a - the image The enamel is very similar to the traditional cathode ray tube τ 曰 display, but its volume is much lighter and thinner than that of the cathode ray tube. Compared with the liquid enthalpy display (LCD), the viewing angle range is small, the reaction speed is insufficient, and the true Z. (especially in large size) and other shortcomings, as well as eDonkey display (pD / = :: electricity, high heat, not suitable for small-sized panels and all black, field emission display; j can be one by one, i field emission Display 2 Waiting: Deuterated LCD display:: f The plasma display of the alum star is really a good choice. Because of the rapid development of nanotechnology, it will be used for field emission display 8 The trend will further promote its development Mature product upon is first shown in FIG cross-sectional view of a typical, structure mainly comprises a plate (10) and the cathode plate (20) two anode-gate structure of a field emission display, the male

1250813 V. Description of the invention (2) A spacer (14) is disposed between the electrode plate (10) and the cathode plate (20),

Provided as a space between the anode plate (10) and the cathode plate (20), and as a support between the anode plate (10) and the cathode plate (20), the anode plate (1〇) comprises an anode substrate ( 1 1) an anode conductive layer (12) and a phosphor layer (i3); and the cathode plate (2) comprises a cathode substrate (21) and a cathode conductive layer (2) 2) an electron emission source layer (23), a dielectric layer (24) and a gate layer (25); wherein the interrogation layer (25) is provided with a potential difference to induce an electron emission source layer (2 3 The electron emission, by the 咼 voltage provided by the anode (1 2 ), provides the acceleration of the electron beam, so that the electron has sufficient kinetic energy to impinge the phosphor powder on the anode plate (1 〇) The bulk layer (13) is excited to cause it to emit light. Another simplified two-pole structure field emission display has only an anode plate (10) and a cathode plate (2〇), and no gate layer (25) is provided. However, under such a structure, the beam is The kinetic energy is lower, and the resulting surface is less bright, which is more suitable for occasions with lower shell requirements, such as aircraft or ship instruments, and is only used as a planar light source. ’

The advantages of the % emission display are as described above, but the conventional ones can be used for single-sided display, although it is suitable for family and general commercial use: 1:: and special occasions for dual display, such as exhibition, store and stadium. That is, it is necessary to use two stand-alone back-to-back settings to achieve double-sided display, but the single unit is completely independent, and the resources cannot be shared or shared (such as channel selector, signal processor and control circuit), which will inevitably result. Purchase, ^, increase and waste, and the need to use two sets of independent solids when installing, is not economical.

1250813 —------ V. INSTRUCTIONS (3) [Summary of the Invention] The main purpose of this document is to provide a field display that can be displayed on both sides, ", the staff member can provide a single body to provide the opposite direction. The two-sided screen display and the shared part are integrated, the manufacturing cost is lower than the one side of the rain table, and only one set of fixing frames is required to be fixed in the ampoule, that is, the purchase is completed. The cost and the installation cost need to be effectively reduced. In order to achieve the above object, the present invention mainly comprises a cathode plate sandwiching between two anode plates, γ, a cathode unit is disposed on both sides of the cathode plate, and an anode unit on the two anode plates. Corresponding to the second embodiment of the present invention, the first embodiment of the present invention is a side view of the first embodiment of the present invention. It can be seen that the present invention mainly consists of a cathode plate. (3) and the second anode plate), wherein the cathode plate (3) is sandwiched between the two anode plates (4, and the cathode plates (3) are symmetrically arranged with the cathode conductive sounds respectively) and % Sub-source layer (32) to form a common cathode plate (3) The two sets: U: L plate (4 '5) facing the cathode plate (8) - side respectively 5 ^ Λ π with the package side strip (6) to form a support to maintain the fixed space" 5 can be equipped with a plurality of supports ( Spacer), the two sides of your board (3) form a corresponding set of anode and cathode units ~, and the pole group shares the cathode field (3) of the two-pole structure of the independent field emission: - cathode conductive layer (7) And the anode conductive layer (4) '(1) is applied 'suitable - when electricity · located at !25〇813

5. In the invention description (4), the symmetrical structure of the two anode plates (4, 5) can be divided into two, and one of the two sides of the cathode plate (3) is oriented in the direction of the anode. Single-early 7L can be double-displayed after the other (4,5) is formed, and the second scorpion beam is used, and the two anode plates are respectively imaged to obtain a simplified common cathode plate (3). It can also be applied to a three-pole or four-pole junction, such as a third HI gp A - industry--one, each ♦ green page does not have a '4, 5) additional gate layer (7), U% plate (3 (71) 5 The gate layer (7) is provided with a plurality of through holes ^ each corresponding to each group of corresponding anode and cathode units, and the electron beam emitted by the mother and cathode is passed through the anode plate of the idle pole 11 ( 4) The anode unit. It is also possible to add a convergent electrode, ς(7) and % plate or focusing effect between the gates (' (4) to avoid excessive production of a convergent emission display. The field of the quadrupole structure is as far as the manufacturing method of the present invention, the anode plate (4, 5 = re-stated. The cathode plate (4) part can be based on the glass plate and the surface thereof is sputtered and sprayed. Or evaporating a layer of conductive material to form an electric layer (3 1 ), or a metal plate as a substrate, directly to the surface, the cathode conductive layer (1), that is, the cathode plate (7) and the cathode surface σ are one, as for the electron The emission source layer (32) is made of nano-b曰n nanotubd, which is provided with two ways, the _ 2 meter carbon tube is immersed in a kind of volatile solvent' and the bead fixing agent is added. Adding agent to form a low viscosity spray solution, and then spraying it on the surface of the *polar conductive layer (3 1 ) with high pressure air. For details, please refer to the applicant's application.

Page 9 1250813 V. Inventive Note (5) China's invention patent application No. 9 2 1 3 1 5 9 0, after spraying, and then sintering and shaping by a vacuum sintering technology, the carbon nanotube cloth can be The vacuum sintering technique is applied to the two sides of the cathode plate (3). The glass cover is used to make the inside of the sintering furnace 'closed state, one by diffusion pump (D iffusi ο η Pump) and oil pumping. The low pressure generating module composed of (Oil Pump) maintains the sintering furnace at a low pressure near the vacuum, and the low temperature generating module composed of the infrared ceramic heating plate and the ceramic thin plate heats the cathode plate (3) to a predetermined temperature change rate. For details, please refer to the application in our patent No. 932060 92, which is also applied for by the applicant of this case. Another method for laying a carbon nanotube is electrophoretic plating, which mainly involves a solution or suspension containing a nano tube, and adding a chemical as a charge to the solution. And then, the two electrodes are immersed in the solution, wherein one of the electrodes is a substrate for generating a carbon nanotube (ie, a cathode plate), and an alternating current or a direct current electric field is applied between the two electrodes to make the solution The carbon nanotubes are attached to the substrate, and the carbon nanotubes (ie, the electron emission source layer (32)) can be smoothly formed on both sides of the cathode plate (3). The details of the method can be seen in the United States. Patent application publication No. 2 〇〇 3 / 〇 1 〇 2 2 2 2 . In summary, the present invention achieves the function of double-sided display by sharing the symmetrical structure of the cathode plate (3), and the manufacturing cost of the two single-sided display single machines is improved. In the past, it was inconvenient and uneconomical to use two single-sided display machines. For users who need double-sided display, the cost of installation and installation cost can be effectively reduced. However, the above description is only a specific description of the preferred embodiment of the present invention,

Page 10 1250813 V. INSTRUCTIONS (6) To limit the scope of the patent of the present invention. (Page 11_:_11 1250813 Schematic description of the first figure: a partial side cross-sectional view of a field emission display with a conventional three-pole structure on one side. Second figure: a side view of the second pole structure of the present invention Fig. 3 is a side cross-sectional view of the three-pole structure of the present invention. [Component symbol] Conventional part: 10.. • Anode plate 11 · · Anode substrate 12 · · Anode conductive layer 13. • Fluorescent powder layer 14 · · Supporter 20 · · • Cathode plate 21.., Cathode substrate 22 · · Cathode conductive layer 23.. Electron emission source layer 24 · · • Dielectric layer 25 · • Gate layer part of the invention: 3... cathode plate 31 ... cathode conductive layer 3 2 ... electron emission source layer 4, 5 ... anode plate 41, 51 ... anode conductive layer 42. ..Fluorescent powder layer 6 ... package side strip 7 ... noisy layer 7 1 · through hole

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Claims (1)

1250813 6. Patent application scope 1 · A field emission display capable of double-sided display, comprising: a cathode plate, which is a glass plate, on both sides of which are respectively provided with a cathode conductive layer, and are respectively arranged on the two cathode conductive layers Electron emission source layer; Two anode plates are respectively symmetrically disposed on two sides of the cathode plate, and an anode conductive layer is disposed on one side of the anode plate facing the cathode plate, and the anode conductive layer is provided with fluorescent light corresponding to the electron emission source layer The powder layer; wherein the cathode plate and the anode plate form a specific gap by using a package strip or a support, and when an appropriate potential is applied to the cathode conductive layer and the anode conductive layer, the electron emission source layer on both sides of the cathode plate can be formed. The electron beams are respectively emitted, and the corresponding phosphor powder layers are struck to be imaged on the two anode plates. A 2σ1 field-emitting display device capable of double-sided display as described in claim 1 wherein the electron emission source layer is composed of a carbon nanotube. ... 3 · A field emission display that can be displayed on both sides, including: The cathode plate is a metal plate, and the cathode guide layer L is directly formed on both sides thereof, and the electron emission source layer is respectively disposed on the two cathode conductive layers; the two anode plates are respectively symmetrically disposed on both sides of the cathode plate An anode conductive layer is disposed on one side of the anode plate facing the cathode plate, and the anode conductive layer on the anode is further provided with a phosphor powder layer corresponding to the electron emission source layer; And the anode plate is formed by the package strip or the supporter. When the appropriate potential is applied to the cathode plate and the anode conductive layer, the electron emission source layers on both sides of the plate respectively emit the electron glory powder layer. For imaging on the two anode plates. ¥ corresponds to the factory, 4 crying as shown in the third paragraph of the patent application scope, the double-sided display field emission is not obvious, wherein the electron emission source layer is composed of carbon nanotubes. Page 13