Flat panel display having a random spacer arrangement

Details Flat panel display having a random spacer arrangement Flat panel display having a random spacer arrangement

1997-12-15

2000-04-04

Patel, Nimeshkumar D.

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

313292, 313482, 313258, H01J 188, H01J 1942

Patent

active

060465417

ABSTRACT:
A flat panel display (12) includes a backplate (14) and a faceplate (16) attached to the backplate (14) defining a vacuum enclosure (18) therebetween. A spacer (46, 62, 64, 78, 80, 90) is positioned between the backplate (14) and the faceplate (16). The spacer geometry is anti-symmetrical and non-integral with respect to an array of electron emitters (30, 48, 76) on a cathode plate (22) overlying the backplate (14). The spacers have a curved surface (52, 78, 82) that is characterized by a radius r, or by a length d.sub.3 of a unit shape having bend angles .alpha. and .beta., whereas the electron emitter arrays are characterized by orthogonally arranged rows (32) and columns (34). The anti-symmetrical and non-integral relationship between the spacers (46, 62, 64, 78, 80, 90) and the electron emitters reduces the number of electron emitters and pixels (49, 77, 86) that are occluded by the spacers. Additionally, the anti-symmetrical and non-integral relationship permits the spacers (46, 62, 64, 78, 80, 90) to be randomly distributed between the backplate (14) and the faceplate (16) of the flat panel display (12). A spacer processing method includes the step of cutting ribbons from a thin spacer sheet, placing the ribbons into cavities within a mold, and heating the mold to below the annealing point of the spacer material.

REFERENCES:
patent: 5589731 (1996-12-01), Fahlen et al.
patent: 5859497 (1999-01-01), Anderson et al.
patent: 5889363 (1999-03-01), Beetson et al.

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