Abstract in simplified Chinese:本发明揭露了一种显示器用之间隔件结构,其具有符合或极接近高品质且令人满意玻璃之热膨胀系数之一热膨胀系数以用于制造如皮肤之其他显示结构。此间隔件结构系为具有于一定热膨胀系数范围内可经修改以接近符合跨越数种容易得到之高品质且令人满意玻璃之材料以用于制造如皮肤之其他显示结构。于本发明中所揭露之间隔件结构具有可达成前述品质之热膨胀系数且保留其于显示器使用中所需之所有特征与特质。此外,当选择其他显示器组件时,本发明所揭露之间隔件结构具有极佳弹性并无须改变现今制造技术。此外,于本发明中揭露了可极小化零电流偏移之一种间隔件结构。
Abstract:
A spacer structure for a display is disclosed that has a CTE whichmatches or very closely approximates the CTE of a high quality, desirable glassfrom which other display structures such as faceplates can be fabricated. Thespacer structure is composed of a material that has a CTE that is tailorable within a range that closely matches the CTE range spanned by a variety of readilyavailable high quality, desirable glass from which other display structures such as faceplates can be fabricated. The spacer structure disclosed has a CTE thatachieves the foregoing qualities and retains all other properties characterizing requirements for use in displays. Further, the spacer structure disclosed has aCTE that enables great flexibility in the selection of other display components, without having to revamp existing fabrication techniques. Further still, a spacerstructure is disclosed that minimizes zero current shift.
Abstract:
A circuit and method for displaying both interlaced and non-interlaced video information on a flat panel display. The flat panel display is a field emission display (FED) screen. Within the FED screen, a matrix of rows and columns is provided and emitters are situated within each row-column intersection. Rows are activated (e.g., enabled) sequentially and separate gray scale information (voltages) is presented to the columns. When the proper voltage is applied across the cathode and anode of the emitters, they release electrons toward a phosphor spot, e.g., red, green, blue, causing an illumination point. The present invention includes circuitry for enabling the rows in one of two different modes. In a first mode, the rows are enabled sequentially with each pulse width o the sufficient duration ("long pulse") to perceptively energize the row for displaying image data thereon. In this mode, the rows are enabled for the display of non-interlaced video information. In the second mode, an interlaced mode, every other row driving pulse has a width that is insufficient ("short pulse") to energize the row such that it does not perceptively display of information. By alternating pulse widths in this manner, an interlaced display mode is allowed wherein every other row is energized. Interlaced video can therefore be displayed using the same row enable and driver circuitry that is used for non-interlaced display. By providing n short pulses, per long pulse, every nth row can be energized for realizing alternate interlaced display modes.
Abstract:
Methods for compensating for brightness variations in a field emission device. In one embodiment, a method and system are described for measuring therelative brightness of rows of a field emission display (FED) device, storinginformation representing the measured brightness into a correction table and using the correction table to provide uniform row brightness in the display by adjustingrow voltages and/or row on-time periods. A special measurement process is described for providing accurate current measurements on the rows. This embodiment compensates for brightness variations of the rows, e.g., for rows nearthe spacer walls. In another embodiment, a periodic signal, e.g., a high frequencynoise signal, is added to the row on-time pulse in order to camouflage brightnessvariations in the rows near the spacer walls. In another embodiment, the areaunder the row on-time pulse is adjusted to provide row-by-row brightnesscompensation based on correction values stored in a memory resident correctiontable. In another embodiment, the brightness of each row is measured and compiled into a data profile for the FED. The data profile is used to control cathodeburn-in processes so that brightness variations are corrected by physically altering the characteristics of the emitters of the rows.
Abstract:
A flat-panel device is fabricated by a process in which a pair of plate structures (40 and 42) are sealed along their interior surfaces (40A and 42B) to opposite edges (44A and 44B) of an outer wall (44) to form a compartment. Subsequently, exterior support structure (64) is attached to the exterior surface of one of the plate structures (40) to significantly increase resistance of the compartment to bending. Exterior support structure (66) is normally likewise attached to the exterior surface of the other plate structure (42) after the sealing operation. The compartment is then typically pumped down to a high vacuum through a suitable pump-out port (46) and closed. By providing the exterior support structure at such a relatively late stage in the fabrication process, the need for using spacers to support the device against external forces is eliminated or substantially reduced while simultaneously avoiding severe fabrication difficulties that arise in attaching the exterior support structure before the sealing operation.
Abstract:
A getter (50 or 74) situated in a cavity of a hollow structure, such as a flat-panel device, is activated by directing light energy locally through part of the hollow structure and onto the getter. The light energy is typically provided by a laser beam (60). The getter, typically of the non-evaporable type, is usually inserted as a single piece of gettering material into the cavity. The getter normally can be activated/re-activated multiple times in this manner, typically during the sealing of different parts of the structure together. The getter-containing cavity can be formed by a pair of plate structures (40 and 42) sandwiched around and outer wall (44), or by an auxiliary compartment (72) connected to a larger main compartment (70) typically constituted by the plate structures and outer wall.
Abstract:
Portions (40 and 44) of a structure, such as a flat-panel display, are positioned such that a sealing area (40S) of one portion is at least partially separated from a corresponding sealing area (44S) of another portion such that a gap (48) at least partially separates the two sealing areas, typically by height of 25 microns or more. Energy is applied in a "gap jumping technique" to locally heat material of at least one portion along the sealing area such that the material bridges the gap and seals the portions (40 and 44) together. A laser is typically employed to locally melt and draw the material into the gap by a combination of factors such as surface tension and capillary action. A first part of the gap jumping technique may be performed in a non-vacuum environment to tack the portions together, but the gap jumping technique is typically completed in a vacuum to form an evacuated panel.
Abstract:
A flat panel display (300) having a faceplate structure (320), a backplate structure (330), a focusing structure (333a), and a plurality of spacers (340). The backplate structure includes an electron emitting structure (332) which faces the faceplate structure. The focusing structure has a first surface which is located on the electron emitting structure, and a second surface which extends away from the electron emitting structure. The electrical end of the combination of the focusing structure and the electron emitting structure is located at an imaginary plane located intermediate the first and second surfaces of the focusing structure. The spacers are located between the focusing structure and the light emitting structure. Each spacer is located within a corresponding groove in the focusing structure such that the electrical end of each spacer is located coincident with the electrical end of the combination of the focusing structure and the electron emitting structure.
Abstract:
A gated electron-emitter is fabricated by a process in which particles (26) are deposited over an insulating layer (24). Gate material is provided over the insulating layer in the space between the particles after which the particles and any overlying material are removed. The remaining gate material forms a gate layer (28A or 48A) through which gate openings (30 or 50) extend at the locations of the removed particles. When the gate material deposition is performed so that part of the gate material extends into the spaces below the particles, the gate openings are beveled. The insulating layer is etched through the gate openings to form dielectric openings (32 or 52). Electron-emissive elements (36A or 56A) are formed in the dielectric openings. This typically involves introducing emitter material through the gate openings into the dielectric openings and using a lift-off layer (34), or an electrochemical technique, to remove excess emitter material.
Abstract:
The present invention is a system and method for monitoring FEDperformance and compensating for adverse impacts associated with displayemission generation. A present invention FED adjustment system and methodis capable of providing real time emission characteristic monitoring duringretrace periods. In one present emission compensation method a feedback typeprocess is utilized that drives a constant level on dummy pixels not included in the active viewing area and compares the results (e.g., the current that isassociated with the emission) to an expected certain predetermined amount. If the current is too high then the voltage supply is reduced to the drive level or ifthe current is too low the voltage is increased.