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1. 发明专利

JP2002107716A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JP2002107716A
公开(公告)日：2002-04-10
申请号：JP2000254964
申请日：2000-08-25
申请人： HITACHI LTD , HITACHI ELECTRONIC DEVICES CO
发明人： KAWADA TOMOAKI , TEZUKA AKIO , HIRAYAMA TOSHIO , MIYAWAKI TOSHITSUGU , NATORI MASATAKA
IPC分类号： G02B6/00 , F21V8/00 , F21Y103/00 , G02F1/1335 , G02F1/13357 , G09F9/00
摘要： PROBLEM TO BE SOLVED: To improve the use efficiency of light by resolving the unevenness of luminance on a picture accompanying the frame narrowing of a liquid crystal display device. SOLUTION: A light emission control pattern THR, consisting of plural grooves the extension directions of which are inclined to a side (light incidence face) where a linear lamp LP of a light transmission plate GLB is set, is provided on the surface of a corner part of the side. The light emission control pattern THR is obtained by forming these grooves in the corner part on the light incidence face of a stamper balanced in the face by a method like cutting.

2. 发明专利

JPH05200444A SHADOW MASK FORMING DEVICE 失效
公开(公告)号：JPH05200444A
公开(公告)日：1993-08-10
申请号：JP1374592
申请日：1992-01-29
申请人： HITACHI LTD
发明人： ITO MASAHIRO , MIYAWAKI TOSHITSUGU
IPC分类号： B21D22/26 , B21D24/00 , H01J9/14 , H01J29/07
摘要： PURPOSE:To prevent the peripheral part of a sheet metal from being deformed by forming the abutting surface between a die and a pressure pad to the imaginary extending surface outside the abutting surface between a knockout and a punch so that it is more inclined toward the die side from the extending surface between the inside surface and the outside surface. CONSTITUTION:The die 15 and a pressure pad 17 are provided to press the periphery of the sheet metal 13 respectively at its surface and back face. The knockout 14 and the punch 16 are prepared to press and form a part located between the die 15 and the pressure pad 17 respectively from its surface and back face excluding the periphery of the sheet metal material 13. The abutting surface between the die 15 and the pressure pad 17 is formed to the imaginary extending surface outside the abutting surface between the knockout 14 and the punch 16 so that it is more inclined to the die side than to the extended surface between the inside end and the outside end. In this way, generation of deformation can be avoided on the peripheral part of a shadow mask curved surface formed.

3. 发明专利

JPS6477824A MANUFACTURE OF SHADOW MASK FRAMING 失效
公开(公告)号：JPS6477824A
公开(公告)日：1989-03-23
申请号：JP23216487
申请日：1987-09-18
申请人： HITACHI LTD
发明人： TANABE HIDEO , SHINODA MASAKI , KAWAMURA TAKAO , IKEDA MAMORU , MIYAWAKI TOSHITSUGU
IPC分类号： H01J9/14
摘要： PURPOSE:To suppress generation of wrinkles on a shadow mask by placing thereon a metal sheet in approx. the same shape as the weld surface of a frame, and putting an electrode having a tip in the same shape as the desired welding line on the metal sheet in pressurization and close contact, followed by supply of current. CONSTITUTION:A shadow mask 2 is heated from above by a heater 7 to approx. 120 deg.C. When the temp. of this shadow mask 2 has become constant, a table 4 is moved, and a frame 1 is moved and fixed to a specified position under the shadow mask 2. Simultaneously with movement and fixation of the frame 1 to the specified position, an aluminum sheet 8 in approx. the same shape as the top 1a of the frame 1 is placed on the welds of the shadow mask 2. An electrode 9 of Cu or Cu alloy, which is in the same shape as the welds 1b shown by a two-dotted chain line connecting approx. the center of the frame top 1a and has a tip with sharp profile, is put on the sheet 8 in pressurization and close contact, followed by supply of current. According to this arrangement the shadow mask 2 is welded momentarily throughout the outside circumference of the frame 1.

4. 发明专利

JPS6450338A MANUFACTURE OF SHADOW MASK FRAME 失效
公开(公告)号：JPS6450338A
公开(公告)日：1989-02-27
申请号：JP20627787
申请日：1987-08-21
申请人： HITACHI LTD
发明人： KAWAMURA TAKAO , TANABE HIDEO , SHINODA MASAKI , IKEDA MAMORU , MIYAWAKI TOSHITSUGU
IPC分类号： H01J9/14
摘要： PURPOSE:To improve reliability of a shadow mask with a uniform tension and less wrinkles by placing the shadow mask on a frame, pressing the shadow mask with another frame to make the shadow mask adhere to the frame, and welding the portions of the shadow mask inside or outside the other frame. CONSTITUTION:A frame 1, placed on a table 4 made of a material of good conductivity connected to one of electrodes 3 of a welding power source, is electrically connected to the electrode 3. A shadow mask 2 is flatly held with its several positions stretched in radial directions from the center by means of springs 6 attached to a holding jig 5. Upon moving and fixing the frame 1 to a specified position, a frame 8 is lowered to be pressed in close contact the shadow mask 2. The thermally expanded shadow mask 2 is pressed and brought into close contact with the frame 1 by means of the frame 8 and welding positions of both of the components are fixed. Another electrode 9 for seam welding is rotated while in contact with the frame 8 to perform the seam welding. Since the thermal capacity of the frame 1 is large, temperature rise due to the welding is small. On the other hand, since the shadow mask 2 is fixed to the frame 1 while being heated and expanded, tensile forces are produced on the entire surface when cooled to the room temperature.

5. 发明专利

JPS58161232A COLOR PICTURE TUBE ELECTRON GUN AND MANUFACTURING METHOD THEREOF 失效
公开(公告)号：JPS58161232A
公开(公告)日：1983-09-24
申请号：JP4277382
申请日：1982-03-19
申请人： HITACHI LTD
发明人： MIYAWAKI TOSHITSUGU , MATSUDA KENICHI , YABE MINORU , MAJIMA KAZUO
IPC分类号： H01J9/14 , H01J29/50
摘要： PURPOSE:To secure such a focusing electrode that is no fear of any slippage occurrence in its focusing point in an easy manner and in a way of highly assembling accuracy, by forming the electrode in a state of what a burring die, a burring bottom hole and a burning punch are all being decentered one another, while providing a cylindrical tilting part with a curved concave part. CONSTITUTION:For example, an opening 122a at the side of a high potential side electrode 12 is concentrically provided with a cylindrical screening plate 123a having an almost equal inner diameter with the diameter of this opening 122a, and this screening plate 123a is made up in a shape being cut after forming a curved concave part 124a by making a cylinder slant so as to cause the length of its side wall to be successively increased toward a beam's focusing direction. Like this, each of curved concave parts 114a, 114c, 124a and 124c are set up, by making the cylinder slant to each of center axes 4a and 4c, on screening plates 113a and 113c of a low potential side electrode 11 and screening plates 123a and 123c of the said high potential side electrode 12. With this, unevenness in a focusing point converged defectively at one point on an electron beam's shadow mask can be checked to the extent of almost nothing.

6. 发明专利

JPS54157466A FORMING METHOD OF DIRECTTHEATED CATHODE FOR CATHODEERAY TUBE 失效
公开(公告)号：JPS54157466A
公开(公告)日：1979-12-12
申请号：JP6582778
申请日：1978-06-02
申请人： HITACHI LTD
发明人： MIYAWAKI TOSHITSUGU , IKEDA MAMORU , SHIMOMURA SHIGEO , TAKEMOTO TAKEO
IPC分类号： H01J9/04
摘要： PURPOSE:To obtain the products of a high accuracy with no drift nor warp by inserting the part parallel to the area where the reinforcement bead of the tab is provided for the crosspiece which connects the outer frame and the tab of the cathode via the plane plate at the press processing time. CONSTITUTION:In the press processing of the direct-heated cathode on the plane plate, crosspiece 7 is provided in parallel to area 5 where the reinforcement bead of tab 2 is provided. As a result, both the reduction of area of cup 4 and the drift caused by formation of bead 5 are absorbed by the malformation of part 7 of the crosspiece. This results in elimination of the warp for outer frame 3, thus ensuring the cathode processing in a high accuracy. In other words, a miniature direct-heated cathode for the cathode-ray tube using the thin material can be formed through the press processing in a high accuracy and high efficiency.

7. 发明专利

JP2000314882A LIQUID CRYSTAL DISPLAY DEVICE, LIGHT GUIDING PLATE AND MANUFACTURE OF LIGHT GUIDING PLATE 失效
公开(公告)号：JP2000314882A
公开(公告)日：2000-11-14
申请号：JP12441199
申请日：1999-04-30
申请人： HITACHI LTD , HITACHI ELECTRONIC DEVICES CO , NITTO DENKO CORP
发明人： HIYOSHI YASUO , TANIGUCHI HITOSHI , MIYAWAKI TOSHITSUGU , YANO SHUJI
IPC分类号： G09F9/00 , F21V8/00 , G02B6/00 , G02F1/1335 , G02F1/13357
摘要： PROBLEM TO BE SOLVED: To provide a light guiding plate which improves brightness of a backlight or a frontlight without heightening brightness of a light source, and a liquid crystal display device utilizing the same. SOLUTION: The light guiding plate comprises many dotted small recessed parts 9 for reflecting incident light from a light source 1 in the direction of a light emitting plane formed on the surface of the light guiding plate 2 opposite to the plane 16 which emits light to a liquid crystal cell. The sectional shape of the dotted small recessed part 9 is made triangular and, at the same time, its sectionally inclined angle is made to be 50-60 deg., and besides the planar shape of the dotted small recessed part 9, seen from a direction vertical to the plane of the light guiding plate, is made to be nearly rectangular or square, and simultaneously a longer side of the nearly rectangular shape or a side of the nearly square shape is arranged almost parallel with the longitudinal direction of the light source.

8. 发明专利

JP2000171641A BACK LIGHT DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE AS WELL AS PRODUCTION OF LIGHT TRANSMISSION PLATE 失效
公开(公告)号：JP2000171641A
公开(公告)日：2000-06-23
申请号：JP35058998
申请日：1998-12-10
申请人： HITACHI LTD , HITACHI ELECTRONIC DEVICES CO , NITTO DENKO CORP
发明人： HIYOSHI YASUO , TANIGUCHI HITOSHI , MIYAWAKI TOSHITSUGU , YANO SHUJI
IPC分类号： G02B6/00 , F21V8/00 , G02F1/1335 , G02F1/13357
摘要： PROBLEM TO BE SOLVED: To provide a back light device which makes it possible to improve light utilization efficiency and to obtain a large-sized back light having high luminance and a liquid crystal display device as well as a process for producing a light transmission plate. SOLUTION: The back light device and liquid crystal display device have a pair of light sources 1 and 1' which emit fine belt-like luminous fluxes, two sheets of light transmission plates 2 and 2' which have incident surfaces to allow the incidence of the fine belt-like luminous fluxes from each of the light sources 1 and 1', light transparent surfaces for emitting the guided light and base surfaces corresponding to these light transparent surfaces and are formed with plural microrods for reflecting or scattering the guided light progressing deep in the direction of the transparent surfaces by repeating the reflection of the incident light from the incident surfaces at the base surfaces and the light transparent surfaces at least on the base surfaces so as to increase the density thereof with a deeper progression from the incident surfaces and a refractive index member 7 which is installed to face the base surface of these light transmission plates 2 and 2'.

9. 发明专利

JP2000131690A LIGHT TRANSMISSION PLATE AND LIQUID CRYSTAL DISPLAY DEVICE USING IT 失效
公开(公告)号：JP2000131690A
公开(公告)日：2000-05-12
申请号：JP30664298
申请日：1998-10-28
申请人： HITACHI LTD , HITACHI ELECTRONIC DEVICES CO , NITTO DENKO CORP
发明人： TANIGUCHI HITOSHI , HIYOSHI YASUO , MIYAWAKI TOSHITSUGU , YANO SHUJI
IPC分类号： G09F9/35 , G02F1/1335 , G02F1/13357
摘要： PROBLEM TO BE SOLVED: To improve a control property of light, to reduce an optical loss and to improve luminance without increasing the luminance of a light source in a light transmission plate of a rear illumination part used for a liquid crystal display device. SOLUTION: Dots 10 consisting of plural partial nearly columns are formed for changing the light from the light transmission plate 2 incident surface to a prescribed angle in the transmission surface direction, and the total value of the whole dots of the area of the dots 10 is made so as to exist within the range of 4 to 12% of the area of the light transmission plate 2 lower surface (dot forming surface 3) of the light transmission plate 2. Further, the arrangement, the sectional tilt angle are provided properly. Thus, a display element is irradiated by the illumination light having a proper angular distribution from a light emission surface.

10. 发明专利

JPH11311778A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH11311778A
公开(公告)日：1999-11-09
申请号：JP8548498
申请日：1998-03-31
申请人： HITACHI LTD , HITACHI ELECTRONIC DEVICES CO
发明人： TANIGUCHI HITOSHI , HIYOSHI YASUO , MORI YUJI , HIRAYAMA TOSHIO , MIYAWAKI TOSHITSUGU
IPC分类号： G09F9/35 , G02B6/00 , G02F1/133 , G02F1/1335 , G02F1/13357 , G09F9/00
摘要： PROBLEM TO BE SOLVED: To provide a liquid crystal display device with high luminance. SOLUTION: This display device is enabled to irradiate a display element with illumination light having a proper angle distribution from a light-emitting surface by forming dots consisting of small recessed parts for varying the light from a light transmission plate incidence surface to a specific angle to a light transmission surface direction on a light transmission plate 2 and properly controlling the arrangement, size, and sectional tilt angle of the dots. Further, a diffusion sheet, a cholesteric liquid crystal film, and a 1/4-phase plate can be combined when necessary.

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