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1. 发明专利

JPH06153126A PROJECTION TYPE TELEVISION RECEIVER 失效
公开(公告)号：JPH06153126A
公开(公告)日：1994-05-31
申请号：JP29156192
申请日：1992-10-29
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： MATSUMURA YOSHINORI , KOMATSU YASUHIKO , OZEKI KOUSUKE , KITAMURA MAKOTO , NAKAGAWA KAZUNARI , URUMA SHINICHI , YOSHIKI IKUO , TAGO SHUICHI
IPC分类号： H04N5/74 , H04N5/46
摘要： PURPOSE:To minimize the height and the depth of a case by approaching a picture tube and a projection lens to an optical path between a mirror and a screen to the utmost. CONSTITUTION:A screen 2 is fitted to an upper side of a front face of a case 1, and a mirror 3 is fitted downward at a prescribed tilt angle to an inner rear face of the case 1 opposite to the screen 2. A picture tube 4 and a projection lens 5 are fitted upward at a prescribed angle to a bottom face of the case 1 so as to oppose to the mirror 3 at an inner downward direction of the case 1. A single focus type picture tube is adopted for the picture tube 4, the picture tube 4 and the projection lens 5 are set closer to an optical path from the mirror 3 to the screen 2 to the utmost and closer to the front side of the case 1, then a center height (h) of the display pattern is set lower and the depth D of the entire receiver is decreased.

2. 发明专利

JPH07245735A REAR PROJECTION IMAGE DISPLAY DEVICE 失效
公开(公告)号：JPH07245735A
公开(公告)日：1995-09-19
申请号：JP377395
申请日：1995-01-13
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： YOSHIKAWA HIROKI , YOSHIDA TAKAHIKO , WADA KIYOSHI , MORI SHIGERU , OSAWA ATSUO , HIRATA KOJI , OISHI SATORU , WATANABE TOSHIMITSU , SUSO HIROSHI , YOKOYAMA YOSHIMASA , TAKAHASHI AKIRA , KOMATSU YASUHIKO , MATSUMURA YOSHINORI , NAKAGAWA KAZUNARI , OZEKI KOUSUKE , FURUI MAKI , KUBO NAOKO , SHIMADA TSUTOMU
IPC分类号： G02B13/18 , G03B21/10 , G03B21/16 , G03B21/28 , G03B21/62 , H04N5/64 , H04N5/74
摘要： PURPOSE:To install a display device while its rear side is closely in contact with a wall face by specifying an aspect ratio of a transmissive screen, a screen size and a depth of a case so as to reduce a space for installation. CONSTITUTION:This device is provided with a rear projection image display device 1 and a transmissive screen 7 being a screen of the rear projection image display device 1. The aspect ratio of the transmissive screen 7 is nearly 16:9 and the screen size is 33 inches or over and 40 inches or below, or the aspect ratio of the transmissive screen 7 is selected to be nearly 4:3 and the screen size is 36 inches or over and 40 inches or below and the depth of the case is selected to be 400mm or below. Moreover, vent holes for heat dissipation provided on the rear of the case of the device are formed to be inside a maximum depth of the case. Furthermore, the heat generating parts of the device are divided into parts cooled by natural convection and parts cooled by forced convection.

3. 发明专利

JPH06189321A DIGITAL CONVERGENCE CORRECTING DEVICE 失效
公开(公告)号：JPH06189321A
公开(公告)日：1994-07-08
申请号：JP34048792
申请日：1992-12-21
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： OZEKI KOUSUKE , MATSUMI KUNINORI
IPC分类号： H04N9/28
摘要： PURPOSE:To generate a convergence adjustment pattern to the television receivers having each specification without revision of circuit configuration. CONSTITUTION:A pattern ROM 14 stores an adjustment pattern such as data of various cross hatch pattern data and cursor pattern data in advance and the data are read. A cross hatch section 15 generates a cross hatch signal and a cursor generating section 16 generates a cursor signal receiver based on the data and the signals are fed to a video signal processing circuit 4 via a changeover switch 17. A CPU 18 and an AND gate 19 generate a window signal WD in a timing to the designation of the adjustment person on a key board 20 and a changeover switch 17 selects the cursor signal only for the timing of the window signal. Thus, a cross hatch pattern and a cursor at a designated position are displayed on the screen of a CRT 1.

4. 发明专利

JPH07222278A PROJECTION TYPE IMAGE DISPLAY DEVICE 失效
公开(公告)号：JPH07222278A
公开(公告)日：1995-08-18
申请号：JP1238094
申请日：1994-02-04
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： WATANABE TOSHIMITSU , MORI TORU , ISHIZUKA SATOSHI , OZEKI KOUSUKE
IPC分类号： H04N5/64 , H04R1/02 , H04R5/02
摘要： PURPOSE:To compatibly reproduce rich low sounds, to provide high sharpness and to reduce the cost even when the sufficient internal volume of an enclosure can not be secured as an acoustic reproducing device built in a cabinet at a television device provided with a compact cabinet. CONSTITUTION:The internal volume of two pairs of left and right enclosures 3 and 4 built in a cabinet 1 are made different for left and right sides, and difference is provided in low pitch sound characteristics (the sound pressure output characteristics of a low pitch sound area). When plural speaker units consist of a pair of acoustic reproducing devices, unit arrangement is provided to separate the speaker unit for reproducing the basic middle sound area from the floor. Since sound pressure discharged from both the speakers 5 and 6 is synthesized at an audience position, rich low pitch sounds can be reproduced. Especially since the low pitch sound area reduces the direction feeling of sounds, a stereo feeling is not damaged. Further, by separating the speaker unit for reproducing middle pitch sounds from the floor, reflected sounds from the floor can be reduced, and high-sharpness sounds can be reproduced.

5. 发明专利

JPH03285485A DIGITAL CONVERGENCE CORRECTOR 失效
公开(公告)号：JPH03285485A
公开(公告)日：1991-12-16
申请号：JP8485990
申请日：1990-04-02
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： MATSUMI KUNINORI , KAWAGISHI TADAHIRO , KAME MASAHIRO , SHIOMI MAKOTO , OZEKI KOUSUKE , OSAWA MICHITAKA
IPC分类号： H04N9/28
摘要： PURPOSE:To exert D/A conversion upon a correction data train of multiple channels by the small number of D/A converters by multiplexing the correction data train for driving convergence more than two channels stored in a memory to one correction data train by a multiplexer while sharing time. CONSTITUTION:According to a pulse to be generated by a 6-channel time division pulse generation circuit 18, a multiplexer 9 periodically selects correction data trains 11-16 and obtains a multiplexed data train 17. Then, the data train is inputted to sample-and-hold circuits 21, 22 and 26 to be driven by sample/hold pulses 31, 32 and 36 of respectively various phases after being inputted to a D/A converter 10. The outputs of the sample/hold circuits 21, 22 and 26 are extracted as analog processings 41, 42 and 46 and inputted to sample-and-hold circuits 51, 52 and 56 for timing control (adjustment) to be driven by a pulse 67 for timing control (adjustment). Then, respective CY 91, 92 and 96 are driven through LPF 71, 72 and 76 and CY amplifiers 81, 82 and 86 and convergence correction is executed.

6. 发明专利

JPH0310587A DIGITAL CONVERGENCE CORRECTION DEVICE 失效
公开(公告)号：JPH0310587A
公开(公告)日：1991-01-18
申请号：JP14422089
申请日：1989-06-08
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： OZEKI KOUSUKE , YOSHIKI IKUO , OHATA NAOHIKO , SHIOMI MAKOTO , MATSUMI KUNINORI , YOKOYAMA NORIYUKI
IPC分类号： H04N9/28
摘要： PURPOSE:To improve the efficiency of convergence adjustment process by detecting a defect of a digital convergence circuit at an initial stage and especially the defect of writing to a memory for a convergence correction data and detecting the defect for the plural number of times. CONSTITUTION:Horizontal vertical address counters 261, 262 in an adjustment section 200 generate same readout address signal as that of horizontal vertical address counters 109, 110 in a waveform generating section 100 to input an adjustment correction data memory 204 via an address switch 203. As a result, convergence correction according to a convergence correction data in the memory 204 is implemented. Then a personnel adjusting the device observes the pattern subjected to correction and confirms the convergence state to send an instruction how to adjust the convergence by a keyboard 202. Then a CPU 201 rewrites the convergence correction data to match the convergence.

7. 发明专利

JPH0217783A DIGITAL CONVERGENCE CORRECTION DEVICE 失效
公开(公告)号：JPH0217783A
公开(公告)日：1990-01-22
申请号：JP16668288
申请日：1988-07-06
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： OZEKI KOUSUKE , SHIOMI MAKOTO , OSAWA MICHITAKA , MATSUMI KUNINORI , KAWAGISHI TADAHIRO
IPC分类号： H04N9/28
摘要： PURPOSE:To regenerate the DC level of a correction signal at the succeeding stage of a D/A converter by substituting another constant data for correction data only in a vertical fly-back period, and inputting it to the D/A converter. CONSTITUTION:The corrected data read out of a memory 5 is substituted to another constant data separately from the correction data only in the vertical fly-back period in raster scan by a data switching circuit 6, and is inputted to the D/A converter 8. The correction signal converted to an analog signal at the D/A converter 8 is inputted to a clamping circuit 11 via an S/H circuit 9 and a low-pass filter 10, and the vertical fly-back period where the data is substituted to the constant data is pulse-clamped.

8. 发明专利

JPS61288354A DEFLECTION YOKE 失效
公开(公告)号：JPS61288354A
公开(公告)日：1986-12-18
申请号：JP12976685
申请日：1985-06-17
申请人： HITACHI LTD
发明人： OKUYAMA NORITAKA , SHIMIZU TOSHIHARU , OZEKI KOUSUKE , OGURO HIROKI
IPC分类号： H01J29/76
摘要： PURPOSE:To enhance the accuracy of dimensions and winding, by integrally providing winding guide claws around both the open ends of a funnel-shaped bobbin, and filling a magnetic fluid or the like in the internal opening of the bobbin to constitute a magnetic core. CONSTITUTION:Grooves 2a and projections 2b are provided on the inside surface of a funnel-shaped bobbin 2. A vertical and a horizontal deflection coils are wound in an overlaid manner in the grooves 2a. An internal opening 2c is provided in the thick portion of the circumferential body of the bobbin 2. A magnetic fluid or powder is filled in the internal opening 2c to constitute a magnetic core 6. Winding guide claws 2d are integrally provided around both the open ends of the bobbin 2. The transferred portions 3a, 4a of both the deflection coils are housed between the claws 2d. A deflection yoke 1 for a cathode-ray tube is thus constructed so as to enhance the accuracy of dimensions of the inside surface of the core 6 and that of the winding of the coils to much reduce a convergence defect etc.

9. 发明专利

JPS61230244A CONVERGENCE CORRECTION DEVICE 失效
公开(公告)号：JPS61230244A
公开(公告)日：1986-10-14
申请号：JP7085785
申请日：1985-04-05
申请人： HITACHI LTD
发明人： OZEKI KOUSUKE , SHIMIZU TOSHIHARU
IPC分类号： H04N9/28 , H01J29/51 , H01J29/70 , H01J29/76
摘要： PURPOSE:To make it possible to independently correct misconvergence on the screen corner parts by providing the four corner parts in the diagonal directions while having a neck part behind a deflection yoke with the nearly U-shaped magnetic substances having an auxiliary coil on one leg respectively. CONSTITUTION:The nearly U-shaped magnetic substances 8, 11, 14 and 17 are arranged on the four corners in the diagonal directions while having a neck part 30 between behind a deflection yoke 35 of an inline system color cathode- ray tube. And each magnetic substance is so formed as to have two legs 9 and 10, whereby the outside leg is made longer than the inside leg, while the auxiliary coils 4-7 are wound round the long legs respectively. Further, when the electron beams 1B, 1G and 1R are deflected on the corner parts, the misconvergence due to the electron beams 1B and 1R on both ends is corrected by a difference in the strength of the correction magnetic fields 21 and 22. Accordingly, merely the convergence on the screen corner parts can be independently regulated without changing a construction of the deflection yoke.

10. 发明专利

JP2003270722A Rear projection type image display apparatus 有权
标题翻译：后投影类型图像显示设备
公开(公告)号：JP2003270722A
公开(公告)日：2003-09-25
申请号：JP2003016871
申请日：2003-01-27
申请人： Hitachi Advanced Digital Inc , Hitachi Ltd , 株式会社日立アドバンストデジタル , 株式会社日立製作所
发明人： YOSHIKAWA HIROKI , YOSHIDA TAKAHIKO , WADA KIYOSHI , MORI SHIGERU , OSAWA ATSUO , HIRATA KOJI , OISHI SATORU , WATANABE TOSHIMITSU , SUSO HIROSHI , YOKOYAMA YOSHIMASA , TAKAHASHI AKIRA , KOMATSU YASUHIKO , MATSUMURA YOSHINORI , NAKAGAWA KAZUNARI , OZEKI KOUSUKE , FURUI MAKI , KUBO NAOKO , SHIMADA TSUTOMU
IPC分类号： G02F1/13 , G02F1/1335 , G03B21/00 , G03B21/10 , G03B21/14 , G03B21/16 , H04N5/74
摘要： PROBLEM TO BE SOLVED: To provide a rear projection type display apparatus which requires only a narrow space for installation and can be installed on a wall surface without a gap when being installed along the wall and can be received deep into a corner as the whole when being installed at the corner. SOLUTION: In the rear projection type image display apparatus, the projection distance of a projection lens is shortened, and a density of mounting of parts relating an optical system and an electric system is made higher. Furthermore, a width of a rear portion of a housing is reduced rearwards at any portion from the upper portion to the lower portion thereof, and the lower portion of a back cover is depressed inwards. COPYRIGHT: (C)2003,JPO

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