公开(公告)号：JP2002050219A

公开(公告)日：2002-02-15

申请号：JP2000223484

申请日：2000-07-25

Applicant: IBM ,  STANLEY ELECTRIC CO LTD

Inventor： KATSU YOSHIHIRO ,  OSHIMA MASAKI ,  SUZUKI MASARU ,  OKI YOJI ,  OKI YASUYUKI

IPC: F21V8/00 ,  F21Y103/00

Abstract: PROBLEM TO BE SOLVED: To solve problems associated with prior surface light source apparatus, that when a light guide plate is provided with a prism to achieve slimming sown and cost reduction, irregular light is generated to decrease its performance. SOLUTION: The surface light source apparatus 10 includes a lamp 18 and a light guide plate 22. A light emission face 26 or its opposed face 28 of the light guide plate 22 has plural convex and concave parts which extend in the direction facing a light incident face 25 and spread over the light guide plate 22. The convex and concave parts have flat faces 32 on the bottoms of the concave parts or on the tops of the convex parts. In this configuration, the surface, light source apparatus 10 can transmit light in the axis direction of the light 18 and the problem associated with prior prism cut light guide plate such as low light at both end parts can be solved.

公开(公告)号：JP2002324420A

公开(公告)日：2002-11-08

申请号：JP2001119574

申请日：2001-04-18

Applicant: IBM

Inventor： NOGUCHI MICHIKAZU ,  SUZUKI MASARU ,  KATSU YOSHIHIRO ,  SAIKAI SATOKO

IPC: G02B6/00 ,  F21V8/00 ,  F21Y103/00 ,  G02B5/00 ,  G02B5/02 ,  G02B5/08 ,  G02F1/13357

Abstract: PROBLEM TO BE SOLVED: To provide a backlight unit having a high front luminance, which can suppress the occurrence of luminance irregularities. SOLUTION: The backlight unit has a light guide plate 20 and a reflection sheet 206 on the rear face of the light guide plate. The rear face of the light guide plate has a plurality of recessed patterns, which reflect and transmit light. The reflection sheet is a silver reflection sheet and plural posts as spacers are formed on the reflection sheet. Even when the reflection sheet is depressed, the spacers maintain a certain clearance between the rear face of the light guide plate and the reflection sheet. By maintaining the clearance, the occurrence of luminance irregularities on the surface of the backlight unit can be suppressed.

公开(公告)号：JP2001033810A

公开(公告)日：2001-02-09

申请号：JP19189499

申请日：1999-07-06

Applicant: IBM

Inventor： KATSU YOSHIHIRO ,  YAMASHITA HIROSHI ,  KIMURA YASUHIRO ,  TSUJI SATOSHI

IPC: G06F3/041 ,  G02F1/13 ,  G02F1/133 ,  G02F1/136 ,  G02F1/1362 ,  G02F1/1368 ,  G06F3/03 ,  G06F3/033 ,  G02F1/1365

Abstract: PROBLEM TO BE SOLVED: To provide the device and method capable of effectively performing processing on pixel areas of a display device. SOLUTION: On each pixel area 41 on a liquid crystal TFT array substrate, an ITO transparent electrode 43, a gate line 48, a data line 46, a TFT active element 45, an identification mark 50, etc., are formed. The identification mark 50 is provided on the gate line 48 by forming a silver bar code. Since the identification mark is provided in the pixel area, it is possible to surely identify the transistor to be repaired, by detecting the identification mark, for instance, in repair processing of a TFT array substrate. Moreover, in an information processor for inputting graphics and characters onto a screen by using a laser pen, it is possible to accurately specify a locus of the pen by specifying a position of the pixel area from the identification mark detected by the pen, and to recognize inputted graphics, etc., in details.

公开(公告)号：JP2002244127A

公开(公告)日：2002-08-28

申请号：JP2001024758

申请日：2001-01-31

Applicant: IBM

Inventor： KATSU YOSHIHIRO ,  SUZUKI MASARU ,  NOGUCHI MICHIKAZU ,  SAIKAI SATOKO

IPC: G02B5/02 ,  F21V8/00 ,  F21Y103/00 ,  G02B5/08 ,  G02F1/1335 ,  G02F1/13357 ,  G09F9/00

Abstract: PROBLEM TO BE SOLVED: To provide a liquid crystal display device in which production of bright lines can be decreased or prevented. SOLUTION: A light reflecting layer 82 made of Ag or the like and a transparent protective layer 83 for protecting the light reflecting layer 82 are formed on a reflector body 81. The transparent protective layer 83 is formed to

公开(公告)号：JP2002062434A

公开(公告)日：2002-02-28

申请号：JP2000239779

申请日：2000-08-08

Applicant: IBM ,  INT MFG & ENG SERVICES CO LTD

Inventor： ONO MASAKI ,  KIYOOKA FUMITOSHI ,  KATSU YOSHIHIRO ,  SUZUKI MIKIO ,  TSUGANE KOJI

IPC: G02B6/00 ,  F21V5/00 ,  F21V8/00 ,  F21Y103/00 ,  G02F1/1335 ,  G02F1/13357 ,  G09F9/00

Abstract: PROBLEM TO BE SOLVED: To provide a side light type light source device heightening light quantity on a corner part of a light transmission plate at a low cost while responding to a requirement to narrow a picture frame. SOLUTION: A second incident surface 11a2 is formed at an end part in a width direction of the light transmission plate 11 and further the second incident surface 11a2 regresses taking a first incident surface 11a1 as reference. Consequently a light transmission route R is formed between the second incident surface 11a2 and a rubber block 4 and light emitted from a fluorescent lamp 2 and made to pass through the light transmission route R is directly made incident on the light transmission plate 11 from the second incident surface 11a2.

公开(公告)号：JP2001312213A

公开(公告)日：2001-11-09

申请号：JP2000126706

申请日：2000-04-26

Applicant: IBM

Inventor： SUZUKI MASARU ,  KATSU YOSHIHIRO

IPC: G02B6/00 ,  F21V8/00 ,  F21Y103/00 ,  G02B5/02 ,  G02F1/1335 ,  G02F1/13357 ,  G09F9/00

Abstract: PROBLEM TO BE SOLVED: To provide a back light unit, a liquid crystal display device and a method for manufacturing a light guide plate which can decrease generation of bright lines. SOLUTION: The face 11a of a transparent light guide plate 11 where light enters is subjected to machining to form a smooth surface S of the face 11a so that the manufacture error during injection molding is corrected to obtain an edge part E in the form as designed. In order to effectively decrease the generation of bright lines, the radius of curvature or chamfering dimension of the edge part E is preferably controlled to

公开(公告)号：JP2001290601A

公开(公告)日：2001-10-19

申请号：JP2000104053

申请日：2000-04-05

Applicant: IBM

Inventor： NATSUYAMA YOSHIBUMI ,  TAKATSUJI HIROSHI ,  KATSU YOSHIHIRO

IPC: G06F3/041 ,  G06F3/033 ,  G06F3/03

Abstract: PROBLEM TO BE SOLVED: To provide an input pen for touch panel and an input pen, improved in convenience and which does not damage a display. SOLUTION: A touch ball 3 composed of an acetal resin, for example, is provided on a tip part 12 of the input pen, and this touch ball 3 is held via a first spring 15 and a second spring 20. Further, the spring constants of the first spring 15 and the second spring 20 are set so as to establish the condition of (displacement of the first spring 15)>(displacement of the second spring 20)>(deformation quantity of the touch ball 3) when force pressing the touch ball 3 to the side of a main body rod part 1 is operated. Thus, even if the input pen is strongly pressed to a touch panel surface 100 or the like, the deformation of the soft touch ball 3 can be suppressed.