MXPA97005089A - Cat structure of ca emission exhibitor - Google Patents

Abstract

The present invention relates to a cathode structure for a field emission display. In the cathode structure for a display or field emission panel. In the auxiliary electrical path structure is provided to a cathode and / or a gate electrode. According to this, even when an arbitrary pixel is destroyed due to local or abnormal discharge that causes part of the main conductor path to open, the conduction as a whole can be maintained through the auxiliary electric paths, to avoid generating it a poor pixel line

Description

STRUCTURE OF CÁTODO DB mTBTnOR DK BfTSTQIf DK FIELD TO iTRCEDNrRAs DK TWVm »CTOII The present invention relates to a cathode structure for a display or field emission panel. B? A cathode structure for an exhibitor or shell of a cathode unlike a cathode structure for a vacuum tube, where an aatrial gives emission ßlactronas sa heated to generate tsrsoiónicoß, when a strong electric field is formed in a Conical tip gives emission of metallic electrons or gives silicon, the electrons can be emitted when the tip of aalaión gives electrons dabido to the phenomenon gives formation of tunnel of quantum mechanics.One example gives the structure of cathode for a field emission exhibitor sa illustrates schematically in FIGS. 1 and 2. FIG. 1 is a schematic plan view of the cathode structure for a field ammunition display and FIG. 2 shows a schematic sectional view taken over the line shown in FIG. 1. Referring to FIGS. 1 and 2, a plurality of cathodes 3 s provide parallels between a substrate 2 and a plurality of gate electrodes 4 s disposed per pendular to the cathodes 3. Read cathodes 3 and the gate electrodes 4 are isolated from each other by a layer of the material of the intercept 5 interspersed between them. The intersections of the cathodes 3 with the gate electrodes REF: 25074 4 correspond to pixels 6 of the field emission display. Each pixel 6 includes a plurality of conical electron emission tips 3a disposed between the layers of insulating material 5 at the cathode 3 and an orifice 4 disposed at a position corresponding to each of the electron emission tips 3a and formed at the gate electrode 4 to expose the electron emission tip 3a. The cathode 3 acts as an electrical path to apply current, to compensate electrons to the electron emission tips 3a, and the gate electrode 4 acts as an electrical path to apply voltages, to form an electric field such that electrons are emitted from the electron emission tips 3a of the cathode 3. The cathode structure is disposed under an anode (not shown) coated with luminescent material. When a sufficient voltage is applied to the anode, an arbitrary electron emission tip 3a and gate electrode 4 under vacuum atmosphere, a strong electric field is formed, which causes emission of electrons from the electron emission tip 3a. The electrons emitted from the electron emission tip 3a collide or collide with the luminescent material of the anode corresponding to the electron emission tip 3a to emit light from the luminescent material. However, in the conventional anterior cathode structure for a field emission display, due to abnormal discharge generated during operation, the cathode 3 or the gate electrode 4 can electrically open to an arbritic pixel and thus may not act as the electric path previously described. At this time, the electrons can not be emitted from the electron emission tips in all the pixels following the electrically open pixel. Accordingly, a linearly deficient pixel is generated where the positive luminescent material of the corresponding anode can not be emitted. In order to solve the above problem, an object of the present invention is to provide a cathode structure for a field emission display having an improved structure, to apply current to the other pixels arranged at a cathode, even in the case when a main electrical path of the cathode has been electrically opened due to local or abnormal discharge. Another object of the present invention is to provide a cathode structure for a field emission display having an improved structure for applying voltage to the "" * b € roß pixels arranged in a gate electrode, even in the case when a The main electrical path of the gate electrode has opened electrically due to local or abnormal discharge.

To achieve the above objective of the present invention, a cathode structure for a field emission display is provided, which co-learns: a plurality of cathodes arranged in a band pattern, parallel to each other on a substrate; a plurality of gate electrodes arranged with a band pattern at and perpendicular to the cathodes such that the intercepting portions of the gate electrodes with the cathodes form pixels; a plurality of electron emission tips formed at the cathode in the pixel and exposed through holes formed in the gate electrodes; and at least one auxiliary electrical path formed at the cathode such that a current flowing through the cathode can deviate around each pixel. It is preferable that at least one auxiliary electrical path be formed at the gate electrode, such that a voltage that is applied across the gate electrode can deviate around each pixel. To achieve the second objective of the present invention, there is provided a cathode structure for a field emission display, comprising: a plurality of cathodes arranged with a band pattern parallel to each other on a substrate; a plurality of gate electrodes arranged in a band pattern at and perpendicular to the cathodes, such that the intercepting portions of the gate electrodes with the cathodes form pixels; a plurality of electron emission tips formed at the cathode in the pixel and exposed through holes formed in the gate electrodes; and at least one auxiliary electrical path formed in the gate electrode, such that a voltage that is applied across the gate electrode can deviate around each pixel. HRKYB fíKSCRIP IQH DB THE PSBWPS The above objects and advantages of the present invention will be more apparent when describing in detail a preferred embodiment thereof with reference to the accompanying drawings in which: Figure 1 is a schematic plan view of a structure of conventional cathode for a field emission display; Figure 2 is a schematic sectional view taken on line II-II of Figure 1; Figure 3 is a schematic plan view of a cathode structure for a field emission display according to an embodiment of the present invention; Figure 4 is a schematic sectional view taken on line IV-IV of Figure 3; and Figure 3 is a schematic plan view of a cathode structure for a field emission display according to another embodiment of the present invention.

DESCRIPTION OF THE INVENTION With reference to FIGS. 3 and 4, a cathode structure for a field emission display according to one embodiment of the present invention, such as the above conventional cathode structure for a broadcast broadcasting display. field, includes a plurality of cathodes 30 arranged with a band pattern parallel to each other on a substrate 20, and a plurality of gate electrodes 40 disposed at and perpendicular to the cathodes 30. The cathodes 30 and the gate electrodes 40 are insulated each other by a layer of insulating material 50 sandwiched between them. The portions where each of the cathodes 30 intersect with each of the gate electrodes 40 correspond to pixel 60. Also, like the conventional cathode structure for a field emission display, each pixel 60 includes a plurality of pixel tips. electrode emission 31 disposed between the layer of insulating material 50 at the cathode 30 and the holes 41 formed in the gate electrode 40 to expose the electron emission tip 31. The cathode 30 acts as an electrical path to apply current to compensate electrons to the electron emission tips 31 and the gate electrode 40 acts as an electrical path to apply voltages to form an electric field such that the electrons are emitted from the electron emission tips 31.

With reference to Figure 3, in the cathode structure according to the present invention, unlike the conventional cathode structure described with reference to Figures 1 and 2, each cathode includes an auxiliary electrical path 32 around one side of the cathode. each pixel 60, and each gate electrode 40 includes an auxiliary electrical path 42 around one side of each pixel 60. In the cathode structure of the present embodiment, as described above, the auxiliary electrical paths 32, 42 are provided to the cathode 30 and the gate electrode 40, respectively. Accordingly, even if an arbritely pixel 60 in a main conduction path of the cathode 30 opens electrically due to local or abnormal discharge that may be generated during operation of the field emission carrier, the cathode conducting path 30 as a whole may be retained. through the auxiliary electrical paths 32 formed on one side of the main conductor path. Also, even if the arbitary pixel 60 in a main conduction path of the gate electrode 40 is electrically opened, the conductive path of the gate electrode 40 as a whole can be preserved through the auxiliary electrical paths 42. Accordingly, even when the main conductive paths of the cathode 30 and / or the gate electrode 40 are partially opened, a plurality of pixels 60 can emit electrons, in order to avoid a linear deficient pixel where the luminescent materials that are coated in the anode and correspond to pixels arranged on the cathode or the gate electrode that has electrically open main conducting paths can not emit totally light. According to the embodiment of the present invention, the cathode 30 and the gate electrode 440 include auxiliary electrical paths 32, 42, however any of the cathode 40 or the gate electrode 40 may include the auxiliary electrical paths 32 or 42. , according to the embodiment of the present invention, the auxiliary electrical paths 32 are formed on only one side of each cathode 30 and the auxiliary electrical paths 42 are formed on only one side of each gate electrode 40. Here, the electrical paths auxiliaries 42 are configured in the shape of a circular arc. However, as illustrated in Figure 5, the auxiliary electrical paths 32 'can be formed on both sides of each cathode pixel 30. At this time, the auxiliary electrical paths 32' can be formed to be linear. Also, the auxiliary electrical paths (not shown) in a straight line can be formed on both of the gate electrodes 40 (see Figure 3).

In accordance with the cathode structure for a field emission display of the present invention, the auxiliary electrical sectors are provided to the cathode and / or the gate electrode. According to this, even when an arbitrary pixel destroyed due to local or abnormal discharge causes part of the main conductor path to open, the conduction as a whole can be maintained through the auxiliary electrical paths to avoid generating a poor pixel. linear. It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects to which it relates. Having described the invention as above, the content of the following is claimed as property:

Claims (3)

1. RBIVIHDICACIPHES 1 • - Cathode structure for an exhibition or field emission panel, characterized in that it comprises: a plurality of cathodes arranged with a band pattern, parallel to each other in a substrate; a plurality of gate electrodes arranged with a band pattern at and perpendicular to the cathodes, such that the intercepting portions of the gate electrodes with the cathodes form pixels; a plurality of electron emission tips formed at the cathode in the pixel and exposed through holes formed in the gate electrodes; and at least one auxiliary electrical path formed in the gate electrode such that a voltage that is applied across the gate electrode can deviate around each pixel.
2. 2. Cathode structure for a field emission display according to claim 1, characterized in that at least one auxiliary electrical path is formed in the gate electrode in such a way that a voltage is applied through the gate electrode. it can deviate around each pixl.
3. 3. Cathode structure for a field emission display, characterized in that it comprises: a plurality of cathodes arranged with a band pattern, parallel to each other in a substrate; a plurality of gate electrodes arranged with a band pattern at and perpendicular to the cathodes, such that the intercepting portions of the gate electrodes with the cathodes form pixel; a plurality of electron emission tips formed at the cathode in the pixel and exposed through holes formed in the gate electrodes; and at least one auxiliary electrical path formed in the gate electrode such that a voltage that is applied across the gate electrode can deviate around each pixel. RBSTJMBH DB LA IBVBHCIQH The present invention relates to a cathode structure for a field emission display. In the cathode structure for a display or field emission panel. In the auxiliary electrical path structure is provided to a cathode and / or a gate electrode. According to this, even when an arbitrary pixel is destroyed due to local or abnormal discharge that causes part of the main conductor path to open, the conduction as a whole can be maintained through the auxiliary electric paths, to avoid generating it a linear deficient pixel.