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21. 发明专利

JPS55129971A RECORD PLAYER 失效
公开(公告)号：JPS55129971A
公开(公告)日：1980-10-08
申请号：JP3441879
申请日：1979-03-26
申请人： HITACHI LTD
发明人： ASADA AKIHIRO , TANAKA HIROMICHI , IMAMURA OSAMU
IPC分类号： G11B3/085 , G11B19/00 , G11B19/02
摘要： PURPOSE:To protect the stylus tip of a cartirdge and make a timer operation possible, by controlling operations of the tone arm and the turntable according to the program corresponding to the rotation position of the tone arm and the lifter position CONSTITUTION:When the rotation position of the tone arm and the vertical position of the lifter are detected by the optical system, etc., a program stored previously in a control unit is read out to perform processings, and required program control for the tone arm driving motor, the lifter motor, the turntable driving motor, etc., is performed. Consequently, the stage to cause damage of the stylus of the cartridge, for example, a case where the tone arm descends to the region other than the part where the record disc is mounted on the turntable to start rotation of the turntable can be prevented. Further, the timer operation, etc., can be performed easily by program control.

22. 发明专利

JPS55113169A RECORD SIZE DETECTOR 失效
公开(公告)号：JPS55113169A
公开(公告)日：1980-09-01
申请号：JP1837979
申请日：1979-02-21
申请人： HITACHI LTD
发明人： ASADA AKIHIRO , TANAKA HIROMICHI , IMAMURA OSAMU
IPC分类号： G11B19/12
摘要： PURPOSE:To make a secure measurement without influencing fitting accuracy of photo detection holes by setting the counting period of a counter, triggered by a photo detection pulse through a through hole provided in a turntable for record size detection, to a fixed value. CONSTITUTION:When one group of photo detection holes 104... on diameters of turnatable 101 differing in length and shifting in position is detected, FF506 is set to open gate 508, and fixed pulses are counted by counter 509. When this count value is shorter than time t0 until the other group of photo detection holes 104 is detected and longer than the time until one group of photo detection holes 104... is detected, FF506 and counter 509 are reset through comparator 510 to generate a record size detection signal by passing the count value of counter 503 through latch circuit 504, and even if any other photo detection hole than the initial hole is detected first, the record size is detected by the other group of photo detection holes without reference to the fitting accuracy of photo detection holes.

23. 发明专利

JPS54104872A WATER LEVEL DETECTING DEVICE 失效
公开(公告)号：JPS54104872A
公开(公告)日：1979-08-17
申请号：JP1150878
申请日：1978-02-06
申请人： HITACHI LTD
发明人： IMAMURA OSAMU , FUJITA NAOYA
IPC分类号： G01F23/26
摘要： PURPOSE:To detect the water level correctly, by providing a first electrode to detect the water level, and a second electrode to convert the change in the water level up to an arbitray set water level different from the first electrode into an electrostatic capacity. CONSTITUTION:The voltage transmitted to one end of each electrode, Cxo, Cy, Cz, appears in each integrating part 3 after passing through detecting parts 5, re-spectively. The output from the water level detecting electrode Cxo after passing through the integrating part 3 is inputted into the positive input terminal of a comparator 1, while the output from the reference voltage electrode Cy is inputted into the negative input terminal of the comparator 1 through a water level setting part 6, and the output from the lowest water level electrode Cz is inputted into the reset terminal of a latch 8 by way of a refill water setting part 7. And the output of the comparator 1 is inputted into the set terminal of the latch 8. Thus, the intersection between Vcy1, Vcy2, Vcy3 showing the output of each set water level of high, medium, and low level of the reference voltage electrode Cy and Vcxo showing the output of the water level detecting electrode may be judged by the comparator 1.

24. 发明专利

JPH11205654A IMAGE DISPLAY DEVICE 失效
公开(公告)号：JPH11205654A
公开(公告)日：1999-07-30
申请号：JP278598
申请日：1998-01-09
申请人： HITACHI LTD
发明人： IMAMURA OSAMU , TODAKA YOSHIHIRO
IPC分类号： H04N5/232 , G06T1/00 , G06T3/60 , G06T7/20 , H04N5/262
摘要： PROBLEM TO BE SOLVED: To correct the position of a rotated image by detecting the rotation deviating amount of the shape of an image between images in series of images of an image pickup device or input device. SOLUTION: This display device displays the erect image of a rotated image by correcting a coordinate to a reference coordinate corresponding to the rotation deviating amount of a first rotation deviating amount detecting means 7c for detecting the rotation deviating amount of a shape provided by tracing due to a first tracing means 7b based on the reference shape of a first reference designating means 7a for setting features such as the coordinate of the shape on a picture to extract the shape from the specified color information of picked-up image, the position of the center of gravity and direction as references for tracing.

25. 发明专利

JPH10285452A IMAGE-PICKUP DEVICE 失效
公开(公告)号：JPH10285452A
公开(公告)日：1998-10-23
申请号：JP8483397
申请日：1997-04-03
申请人： HITACHI LTD
发明人： IMAMURA OSAMU
IPC分类号： H04N5/232 , H04N5/91
摘要： PROBLEM TO BE SOLVED: To display a laterally/longitudinally long image as an erected image by providing a pixel number conversion section that converts number of longitudinal/lateral pixels of the image, based on an output of the aspect selector to a device. SOLUTION: A digital video signal S8 outputted from a camera signal- processing section 5 is given to a pixel number conversion section 54 and stored in a RAM 6a. The video signal S8 is read from the RAM 6a by a prescribed method, with a memory address signal 60 being outputted from a read address generating circuit 57 and a video signal S9 for an erected image of a longitudinally long image for laterally long indication is obtained. The video signal S9 is given to a terminal 62 and given to a color liquid crystal display section 75, through the control of switches 65, 69 by a control signal S37 from an RISC- CPU 7 by an aspect selector 16. On the other hand, a digital video signal S8 (erected image of a longitudinally long image for longitudinally long indication) is given to a display memory 68, and an output signal S10 from the memory 68 is given to a display section 75 via the switch 69.

26. 发明专利

JPH04176275A IMAGE SYNTHESIZING DEVICE 失效
公开(公告)号：JPH04176275A
公开(公告)日：1992-06-23
申请号：JP30233990
申请日：1990-11-09
申请人： HITACHI LTD
发明人： IMAMURA OSAMU , AYUSAWA IWAO
IPC分类号： H04N5/265 , H04N9/74
摘要： PURPOSE:To obtain various kinds of image synthesizing effects by providing two switch means selecting either of an input video signal or the output picture signal of a picture signal generation circuit and adding the output picture signal of these switch-means by means of an adder where an addition rate varies. CONSTITUTION:A picture signal (c) is supplied to a B side of a switch 1, and an output picture signal (d) of a picture signal generation circuit 4 to the B side of a switch 2. The switch 1 selects either of picture signals (a) or (c) by means of a control signal (g). The switch 2 selects either of picture signals (b) or (d) by means of a control signal (h). The output picture signals (e) and (f) of the switches 1 and 2 are supplied to an adder 5. Then, for example, the picture signals (a) and (b) are respectively inputted from input terminals 6 and 7, and when the addition rate of the adder 5 is successively changed while the switches 1 and 2 are respectively closed to the A side, the screen obtained in an output terminal 8 is gradually changed from a moving image to a title, or the picture is changed in reverse, and the CF(cross fade) effect can be obtained.

27. 发明专利

JPH03157065A SYNCHRONIZING SIGNAL GENERATOR 失效
公开(公告)号：JPH03157065A
公开(公告)日：1991-07-05
申请号：JP29502889
申请日：1989-11-15
申请人： HITACHI LTD
发明人： IMAMURA OSAMU , AYUSAWA IWAO
IPC分类号： H04N5/06 , H04N5/95
摘要： PURPOSE:To prevent malfunction due to noise of a frequency divider by discriminating whether or not a pulse width of an input synchronizing signal for a pre-hold period represents a regular width or noise, detecting the noise depending on a discrimination signal and initializing the frequency divider with a regular signal. CONSTITUTION:A period signal generator 10 inputs an initial synchronizing signal J and outputs a command signal K applying preholding to a skew and a period scheduling in the vicinity of skew jump production period and operates a discrimination device 9 by using an output L for a period estimating skew and a period after skew jump in the period of the output K. A recovered horizontal synchronizing signal A is inputted to the discrimination device 9, in which the signal is compared with a pulse width in the inside and when the pulse width is regular, it is regarded to be a normal signal and no output is caused, and when the pulse width is not normal, it is regarded as noise and an output I is generated and an output of a delay device 7 is reset. Thus, malfunction of initial operation due to noise is prevented and the phase of a frequency divider 2 is transferred momentarily to the phase of the recovered horizontal synchronizing signal A.

28. 发明专利

JPH031695A VIDEO SIGNAL RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH031695A
公开(公告)日：1991-01-08
申请号：JP13466189
申请日：1989-05-30
申请人： HITACHI LTD
发明人： TAKAHASHI SUSUMU , OKU MASUO , ABE HIROCHIKA , FUJII YUKIO , IMAMURA OSAMU
IPC分类号： H04N9/896 , H04N9/84 , H04N9/89
摘要： PURPOSE:To attain high picture quality for a picture even when the picture is reproduced on an IDTV (high quality TV receiver) by providing a time base fluctuation correction device (TBC) provided with a luminance signal correction means and with a color signal correction means or the like and a color signal filter means or the like. CONSTITUTION:A reproducing signal from a switcher 5 supplied to a luminance signal reproducing circuit 6 and a color signal reproducing circuit 7 is inputted to a TBC 13. Then the TBC 13 generates and outputs a luminance signal Y and a chrominance carrier signal C' whose time base fluctuation is corrected via a write control circuit 9, a readout control circuit 10, a decoder 11, an encoder 12 and line memories 8, 8''. Then the signal C, is supplied to a C type frame correlation comb-line filter 16, the signal is retarded by one frame at a frame memory 14, subtracted by a subtraction circuit 15 to eliminate the component not inverted for each frame and to extract the component inverted for each frame. Then the chrominance carrier signal C from which a disturbing signal is eliminated is outputted from the filter 16 and added to a signal Y at an adder circuit 17 and a color video signal with high quality is outputted from an output terminal 18.

29. 发明专利

JPH02272882A FRAME SYNCHRONIZER WITH NOISE REDUCTION CIRCUIT 失效
公开(公告)号：JPH02272882A
公开(公告)日：1990-11-07
申请号：JP9283489
申请日：1989-04-14
申请人： HITACHI LTD
发明人： OKU MASUO , ABE HIROCHIKA , FUJII YUKIO , TAKAHASHI SUSUMU , IMAMURA OSAMU
IPC分类号： H04N5/21
摘要： PURPOSE:To realize a frame synchronizer provided with a noise reduction circuit whose memory capacity is reduced by providing a memory means provided with two pieces of filed memories. CONSTITUTION:A frame memory 1 consists of two pieces of the field memories 11, 12, and subtracters 31, 32 and a non-linear coefficient circuit 4 constitute the noise reduction circuit. A video signal of every field is stored alternately in two pieces of the field memories 11, 12 the one with phase difference of just one field is stored in the same address according to the phase of an input video signal, and the video signal with the phase difference of one field similarly is outputted to two output terminals according to the phase of an external video signal, and the presence of correlation is detected according to their difference, and a noise component is extracted from the signal having no correlation, and the noise is reduced. Besides, two field memories 11, 12 as a whole cancel the phase difference between the input video signal and the video signal to be the synchronizing standard of an external part, and function as the frame synchronizer.

30. 发明专利

JPH02264574A NOISE REDUCER 失效
公开(公告)号：JPH02264574A
公开(公告)日：1990-10-29
申请号：JP8472289
申请日：1989-04-05
申请人： HITACHI LTD
发明人： OKU MASUO , ABE HIROCHIKA , FUJII YUKIO , TAKAHASHI SUSUMU , IMAMURA OSAMU
IPC分类号： H04N5/21 , H04N5/93
摘要： PURPOSE:To simultaneously attain the satisfactory noise reduction effect and the suppression of afterimages by subtracting the output signal from the difference signal with a subtraction circuit and attenuating the component changing slowly out of the difference signal. CONSTITUTION:A noise component (e) given from a nonlinear circuit 6 is subtracted from an input video signal (a) with a subtraction circuit 2. Thus the signal (a) is outputted as a video signal (b). The signal (b) is delayed by the delay circuits 4a and 4b and supplied to a subtraction circuit 7. Then the output video signal (f) of the circuit 4b is subtracted from the signal (a) to produce a difference signal (g). The signal (g) is multiplied by a coefficient L with a coefficient device 9 (0

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