公开(公告)号：GB2145277A

公开(公告)日：1985-03-20

申请号：GB8420080

申请日：1984-08-07

Applicant: RCA CORP

Inventor： RAGLAND FRANK ROWLAND

IPC: H01J9/227

Abstract: The present invention is an improvement in a method of screening a line screen slit mask color picture tube. Such method includes coating a faceplate panel of the tube with a photosensitive material, inserting a slit shadow mask into the panel and exposing the photosensitive material by passing light from a line light source through the slits of the mask. The improvement comprises positioning a generally cylindrical shaped lens between the line light source and the faceplate panel during exposure of the photosensitive material. The longitudinal axis of the lens is oriented perpendicular to the longitudinal axis of the line light source. Because of the presence of the lens, the images of the line light source projected through the slits of the mask onto the photosensitive material at locations off the major and minor axes of the panel are rotated toward parallelism with the minor axis thereby resulting in exposure of straight smooth lines on the photosensitive material.

公开(公告)号：GB2136200A

公开(公告)日：1984-09-12

申请号：GB8404606

申请日：1984-02-22

Applicant: RCA CORP

Inventor： RAGLAND FRANK ROWLAND

IPC: H01J29/07 ,  H01J29/86 ,  H01J31/20

Abstract: A cathode-ray tube includes a shadow mask mounted therein. The mask has curvatures along its major and minor axes. The curvature along the major axis is greater at the sides of the mask than at the center of the mask.

公开(公告)号：IT8422355D0

公开(公告)日：1984-08-17

申请号：IT2235584

申请日：1984-08-17

Applicant: RCA CORP

Inventor： RAGLAND FRANK ROWLAND

IPC: H01J9/227 ,  H04N

Abstract: The present invention is an improvement in a method of screening a line screen slit mask color picture tube. Such method includes coating a faceplate panel of the tube with a photosensitive material, inserting a slit shadow mask into the panel and exposing the photosensitive material by passing light from a line light source through the slits of the mask. The improvement comprises positioning a generally cylindrical shaped lens between the line light source and the faceplate panel during exposure of the photosensitive material. The longitudinal axis of the lens is oriented perpendicular to the longitudinal axis of the line light source. Because of the presence of the lens, the images of the line light source projected through the slits of the mask onto the photosensitive material at locations off the major and minor axes of the panel are rotated toward parallelism with the minor axis thereby resulting in exposure of straight smooth lines on the photosensitive material.

公开(公告)号：GB2145277B

公开(公告)日：1987-09-03

申请号：GB8420080

申请日：1984-08-07

Applicant: RCA CORP

Inventor： RAGLAND FRANK ROWLAND

IPC: H01J9/227

Abstract: The present invention is an improvement in a method of screening a line screen slit mask color picture tube. Such method includes coating a faceplate panel of the tube with a photosensitive material, inserting a slit shadow mask into the panel and exposing the photosensitive material by passing light from a line light source through the slits of the mask. The improvement comprises positioning a generally cylindrical shaped lens between the line light source and the faceplate panel during exposure of the photosensitive material. The longitudinal axis of the lens is oriented perpendicular to the longitudinal axis of the line light source. Because of the presence of the lens, the images of the line light source projected through the slits of the mask onto the photosensitive material at locations off the major and minor axes of the panel are rotated toward parallelism with the minor axis thereby resulting in exposure of straight smooth lines on the photosensitive material.

公开(公告)号：IT1175610B

公开(公告)日：1987-07-15

申请号：IT2235584

申请日：1984-08-17

Applicant: RCA CORP

Inventor： RAGLAND FRANK ROWLAND

IPC: H01J9/227 ,  H04N

Abstract: The present invention is an improvement in a method of screening a line screen slit mask color picture tube. Such method includes coating a faceplate panel of the tube with a photosensitive material, inserting a slit shadow mask into the panel and exposing the photosensitive material by passing light from a line light source through the slits of the mask. The improvement comprises positioning a generally cylindrical shaped lens between the line light source and the faceplate panel during exposure of the photosensitive material. The longitudinal axis of the lens is oriented perpendicular to the longitudinal axis of the line light source. Because of the presence of the lens, the images of the line light source projected through the slits of the mask onto the photosensitive material at locations off the major and minor axes of the panel are rotated toward parallelism with the minor axis thereby resulting in exposure of straight smooth lines on the photosensitive material.

公开(公告)号：DE3517401A1

公开(公告)日：1985-11-21

申请号：DE3517401

申请日：1985-05-14

Applicant: RCA CORP

Inventor： RAGLAND FRANK ROWLAND

IPC: H01J29/07

Abstract: An improvement is made in a color picture tube that includes an evacuated envelope having a rectangualr faceplate panel with major and minor axes, wherein a central longitudinal axis of the tube passes through the center of the faceplate perpendicular to the major and minor axes. The faceplate panel includes a shadow mask welded at various points including its corners to a peripheral frame mounted therein. The frame is L-shaped having a first flange approximately paralleling the central longitudinal axis and a second flange extending toward and approximately perpendicular to the central longitudinal axis. The tube improvement comprises the frame having truncated corners wherein the first flange at each of the frame corners is straight, flat and acutely angled with respect to both the major axis and the minor axis. A peripheral portion of the shadow mask conforms to the shape of the first flange and is telescoped thereon. The corner welds attaching the shadow mask to the frame are located approximately at the centers of the straight and flat portions of the truncated corners.

公开(公告)号：DE3406786A1

公开(公告)日：1985-01-31

申请号：DE3406786

申请日：1984-02-24

Applicant: RCA CORP

Inventor： RAGLAND FRANK ROWLAND

IPC: H01J29/07 ,  H01J29/86 ,  H01J31/20

Abstract: A cathode-ray tube includes a shadow mask mounted therein. The mask has curvatures along its major and minor axes. The curvature along the major axis is greater at the sides of the mask than at the center of the mask.

公开(公告)号：GB2136198B

公开(公告)日：1987-03-04

申请号：GB8404604

申请日：1984-02-22

Applicant: RCA CORP

Inventor： RAGLAND FRANK ROWLAND

IPC: H01J29/86

Abstract: A cathode-ray tube includes a rectangular faceplate which has an exterior surface having curvature along both the minor and major axes. The exterior surface of the faceplate includes a rectangular contour near its periphery which substantially lies in a plane which is perpendicular to the central longitudinal axis of the tube.

公开(公告)号：GB2136200B

公开(公告)日：1986-09-24

申请号：GB8404606

申请日：1984-02-22

Applicant: RCA CORP

Inventor： RAGLAND FRANK ROWLAND

IPC: H01J29/07 ,  H01J29/86 ,  H01J31/20

Abstract: A cathode-ray tube includes a shadow mask mounted therein. The mask has curvatures along its major and minor axes. The curvature along the major axis is greater at the sides of the mask than at the center of the mask.

公开(公告)号：GB2136198A

公开(公告)日：1984-09-12

申请号：GB8404604

申请日：1984-02-22

Applicant: RCA CORP

Inventor： RAGLAND FRANK ROWLAND

IPC: H01J29/86

Abstract: A cathode-ray tube includes a rectangular faceplate which has an exterior surface having curvature along both the minor and major axes. The exterior surface of the faceplate includes a rectangular contour near its periphery which substantially lies in a plane which is perpendicular to the central longitudinal axis of the tube.