公开(公告)号：JPH1068826A

公开(公告)日：1998-03-10

申请号：JP19329096

申请日：1996-07-23

Applicant: IBM ,  STANLEY ELECTRIC CO LTD

Inventor： KURIHARA MIKIO ,  HANZAWA FUMIHISA ,  OKI YOJI ,  OTA KAZUSHIGE ,  NOMA TAKU ,  SASAYA HIDEAKI ,  FUKUI TATSUO

IPC: G02B6/00 ,  F21V8/00 ,  G02F1/13 ,  G02F1/1333 ,  G02F1/1335 ,  G02F1/13357

Abstract: PROBLEM TO BE SOLVED: To reduce the size and weight of an apparatus by integrally molding a light transmission plate and a frame by providing both with deformation relieving means. SOLUTION: The light transmission plate 2 and the frame 3 are formed by integrating both by means, such as, for example, two-color molding. The coeffts. of linear expansion and water absorptivity of the members constituting the light transmission plate 2 and the members constituting the frame 3 are so set that their respective values are in a range within ±50%, by which the occurrence of the deformation by a difference between dimensional changes is prevented. An acrylic resin is optimum in terms of optical characteristics, such as transparency, as the members which may be adopted for the light transmission plate 2. Then, the dimensional shapes by the ambient temp. and humidity are made exactly the same with both 2, 3 and the occurrence of the deformation is averted if the acrylic resin colored to, for example, white, is adopted for the frame 3 as well. The use of universal resin materials for the frame 3 is made possible as the second deformation relieving means and ABS resins, etc., are adopted.

公开(公告)号：JP2000089008A

公开(公告)日：2000-03-31

申请号：JP26523699

申请日：1999-09-20

Applicant: IBM

Inventor： HANZAWA FUMIHISA ,  MOGI MANABU ,  SUZUKI MASARU

IPC: G02B6/00 ,  G02B5/02 ,  G02B5/04 ,  G02F1/1335 ,  G02F1/13357

Abstract: PROBLEM TO BE SOLVED: To make increasable the luminance within the visual angle of an liquid crystal display(LCD) device. SOLUTION: The optical film 9 which has a first surface having a waveform structure in which plural pieces of triangle prisms are arranged side by side and has a second surface having a ruggedness structure performing an optical diffuse transmission is used in the LCD device. Top angles of the triangle prisms can be made to be 95 to 120 degree. Moreover, the distances among peaks of the triangle prisms can be made to be

公开(公告)号：JP2001075092A

公开(公告)日：2001-03-23

申请号：JP23391999

申请日：1999-08-20

Applicant: IBM

Inventor： SUZUKI MASARU ,  HANZAWA FUMIHISA

IPC: G09F9/00 ,  F21V8/00 ,  G02F1/1335 ,  G02F1/13357

Abstract: PROBLEM TO BE SOLVED: To decrease deterioration in the luminance caused in a back light of a liquid crystal display panel. SOLUTION: The display device is equipped with a light guide plate 2 disposed on the back face of the liquid crystal display panel 1, first fluorescent tube 3 disposed along at least one side of the light guide plate 2, second fluorescent tube 4 disposed adjacent to the first fluorescent tube 3, and light shielding member 5 which cuts the light directly entering from the second fluorescent tube 4 to the first fluorescent tube 3.

公开(公告)号：JPH06109925A

公开(公告)日：1994-04-22

申请号：JP24622592

申请日：1992-09-16

Applicant: IBM

Inventor： HANZAWA FUMIHISA ,  MOGI MANABU ,  SUZUKI MASARU

IPC: F21V5/02 ,  F21V8/00 ,  G02B5/02 ,  G02B6/00 ,  G02F1/1335 ,  G02F1/13357

Abstract: PURPOSE: To increase luminance within a visual field angle by providing the first surface of a corrugated structure provided with the plural pieces of isosceles triangle prisms and a second surface provided with an optical projected and recessed structure for performing duffusion and transmission. CONSTITUTION: This optical film 9 is constituted of polymethyl metacrylate or polycarbonate and the lower side surface, that is the first surface, is provided with the optical protruded and recessed structure similar to frosted glass. The protruded and recessed structure is required so as to diffuse light in all directions by the same luminance and to generate diffusion and transmission. Also, an upper side surface, that is the second surface, is provided with the corrugated structure. It is provided with the plural pieces of the isosceles triangle prisms arranged side by side with each other. The peak and bottom of the prisms are mutually parallelly arranged and the direction is aligned along the polarization axis of a polarization plate 5 so as to reduce the loss of light sent to an LCD panel 1.

公开(公告)号：JP2002258770A

公开(公告)日：2002-09-11

申请号：JP2001039321

申请日：2001-02-16

Applicant: IBM

Inventor： HIRATSUKA KOJI ,  HANZAWA FUMIHISA

IPC: G02F1/1333 ,  F21S2/00 ,  F21Y103/00 ,  G02F1/13 ,  G02F1/1335 ,  G02F1/13357 ,  G09F9/00

Abstract: PROBLEM TO BE SOLVED: To make a liquid crystal display device cope with design of frame narrowing by surely and easily attaching and detaching a rear frame and a lamp to and from a front frame. SOLUTION: The liquid crystal display device is provided with a front frame 41, a rear frame 42, a diffusing plate 43 set between the front frame and the rear frame, and a lamp 424 which is stored in the rear frame and is set so as to face the diffusing plate, and the front frame 41 and the rear frame 42 have side faces fixed by an attachable and detachable fixing tool 5.

公开(公告)号：JP2002111261A

公开(公告)日：2002-04-12

申请号：JP2000300720

申请日：2000-09-29

Applicant: IBM

Inventor： KURIHARA MIKIO ,  YAMADA YOSHIHISA ,  HANZAWA FUMIHISA

IPC: G02F1/1345 ,  G02F1/13 ,  G02F1/133 ,  G09F9/00 ,  H01L23/36 ,  H01L23/433 ,  H05K7/20

Abstract: PROBLEM TO BE SOLVED: To provide a radiation structure of an IC which is capable of effectively dispersing heat radiated from the IC. SOLUTION: A first heat conductive rubber 83 is laid on the opposite surface of a printed wiring film 42 to a driver IC 43, a second heat conductive rubber 84 is laid on the opposite surface of the driver IC 43 to the printed wiring film 42, and the first rubber 82 is made harder than the second rubber 84. A heat conductive grease is applied to the contact surface of the first rubber 82 with the wiring film 42 and the contact surface of the second rubber 84 with the driver IC 43.

公开(公告)号：DE69317184T2

公开(公告)日：1998-10-29

申请号：DE69317184

申请日：1993-08-18

Applicant: IBM

Inventor： SUZUKI MASARU ,  HANZAWA FUMIHISA ,  MOGI MANABU

IPC: F21V5/02 ,  F21V8/00 ,  G02B5/02 ,  G02B6/00 ,  G02F1/1335 ,  G02F1/13357

Abstract: A backlight device for use in a liquid crystal display (LCD) device (1) includes an optical film (9) of transparent material positioned adjacent light guide means (8) of the backlight device the optical film comprising a first surface having a waved or grooved structure including a plurality of isosceles triangle prisms arranged side-by-side, and second surface having an optically rugged structure for performing diffuse transmission. A backlight device incorporating such an optical film serves to increase the overall luminance within the desired viewing angle of the LCD device by reducing the luminance outside the viewing angle.

公开(公告)号：DE69317184D1

公开(公告)日：1998-04-09

申请号：DE69317184

申请日：1993-08-18

Applicant: IBM

Inventor： SUZUKI MASARU ,  HANZAWA FUMIHISA ,  MOGI MANABU

IPC: F21V5/02 ,  F21V8/00 ,  G02B5/02 ,  G02B6/00 ,  G02F1/1335 ,  G02F1/13357

Abstract: A backlight device for use in a liquid crystal display (LCD) device (1) includes an optical film (9) of transparent material positioned adjacent light guide means (8) of the backlight device the optical film comprising a first surface having a waved or grooved structure including a plurality of isosceles triangle prisms arranged side-by-side, and second surface having an optically rugged structure for performing diffuse transmission. A backlight device incorporating such an optical film serves to increase the overall luminance within the desired viewing angle of the LCD device by reducing the luminance outside the viewing angle.

公开(公告)号：AT163772T

公开(公告)日：1998-03-15

申请号：AT93306536

申请日：1993-08-18

Applicant: IBM

Inventor： SUZUKI MASARU ,  HANZAWA FUMIHISA ,  MOGI MANABU

IPC: F21V5/02 ,  F21V8/00 ,  G02B5/02 ,  G02B6/00 ,  G02F1/1335 ,  G02F1/13357

Abstract: A backlight device for use in a liquid crystal display (LCD) device (1) includes an optical film (9) of transparent material positioned adjacent light guide means (8) of the backlight device the optical film comprising a first surface having a waved or grooved structure including a plurality of isosceles triangle prisms arranged side-by-side, and second surface having an optically rugged structure for performing diffuse transmission. A backlight device incorporating such an optical film serves to increase the overall luminance within the desired viewing angle of the LCD device by reducing the luminance outside the viewing angle.

公开(公告)号：CA2105053A1

公开(公告)日：1994-03-17

申请号：CA2105053

申请日：1993-08-27

Applicant: IBM

Inventor： SUZUKI MASARU ,  HANZAWA FUMIHISA ,  MOGI MANABU

IPC: F21V5/02 ,  F21V8/00 ,  G02B5/02 ,  G02B6/00 ,  G02F1/1335 ,  G02F1/13357 ,  G02B5/124 ,  G02F1/133

Abstract: A backlight device for use in a liquid crystal display (LCD) device (1) includes an optical film (9) of transparent material positioned adjacent light guide means (8) of the backlight device the optical film comprising a first surface having a waved or grooved structure including a plurality of isosceles triangle prisms arranged side-by-side, and second surface having an optically rugged structure for performing diffuse transmission. A backlight device incorporating such an optical film serves to increase the overall luminance within the desired viewing angle of the LCD device by reducing the luminance outside the viewing angle.