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41. 发明专利

JPH02152385A LANDING CORRECTION DEVICE 失效
公开(公告)号：JPH02152385A
公开(公告)日：1990-06-12
申请号：JP30647288
申请日：1988-12-02
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TSURUKI TAKAYUKI
IPC分类号： H04N9/24
摘要： PURPOSE:To obtain a device capable of correcting landing simply even with small size and even when the assembling accuracy of a picture display device is low by providing an index signal delay circuit, a nonvolatile delay time memory, a deviated data memory and a timing correction circuit. CONSTITUTION:An input picture signal 100 for each primary color is stored and read alternately to memories 102a, 102b via an A/D converter circuit 101. An index signal 110 sends a control signal of a delay time memory 104 from a variable delay circuit 103 to a timing correction circuit 105. The correction circuit 105 adds the delayed index signal 111 and the correction data of a data memory 106 set initially on a time axis to form a picture display clock 112. A picture display data is read in parallel from the memory 102 based on the clock 112 in response to number of divisions of the screen, an electronic gun 108 is driven via a D/A converter 107 to display a picture. Or the picture display clock may be generated directly from an index signal by a variable delay circuit controlled by the deviated time memory. Through the constitution above, the timing of the landing is corrected simply.

42. 发明专利

JPH0279578A BEAM INDEX TYPE COLOR TELEVISION RECEIVER 失效
公开(公告)号：JPH0279578A
公开(公告)日：1990-03-20
申请号：JP23114388
申请日：1988-09-14
申请人： SONY CORP
发明人： WAKITA SHINJI
IPC分类号： H04N9/24
摘要： PURPOSE:To prevent unstable operation of both horizontal size control and horizontal linearity correction by supplying a stable signal such as a gray level in place of a color signal for a period when an index signal is not stably detected and for a prescribed period after the signal is stably detected. CONSTITUTION:A control signal generating circuit 19 detects whether or not an index signal is stably obtained, and a DC voltage is supplied to a color picture tube 1 via a switch circuit 9 for a period when no index signal is stably obtained and for a prescribed period after the index signal is stably obtained, and when the index signal is stably obtained from the start of scanning, a control signal P10 controlling to supply a color signal from the start is generated. Thus, the time till the index servo is locked is not prolonged.

43. 发明专利

JPH0254692A BEAM INDEX TYPE COLOR TELEVISION RECEIVER 失效
公开(公告)号：JPH0254692A
公开(公告)日：1990-02-23
申请号：JP20620088
申请日：1988-08-19
申请人： SONY CORP
发明人： ONO SATORU
IPC分类号： H04N9/00 , H04N9/24
摘要： PURPOSE:To reduce change in a brightness caused between a character display period and in other period by varying the control variable of a color purity reduction prevention circuit depending on the character display period and the background display period. CONSTITUTION:Background three primary color signals R, G, B are supplied respectively to input terminals 1A, 1B, 1C. Moreover, character signals R, G, B are supplied respectively to input terminals 2A, 2B, 2C. Then a slice level VSL set by an integration circuit 11 is fed to slicers 3A-3C. Then a weighted slice level xVSL is given to slicers 4A-4C. Thus, the slice level of the background three primary color signals R, G, B is set higher than the character three primary color signals R, G, B. Thus, even if the pattern displaying the character is changed into the pattern with no character, no large brightness change is caused.

44. 发明专利

JPH0253391A TELEVISION DISPLAY DEVICE 失效
公开(公告)号：JPH0253391A
公开(公告)日：1990-02-22
申请号：JP20498388
申请日：1988-08-18
申请人： SONY CORP
发明人： IWAMA JUN , WAKITA SHINJI , ONO SATORU , HOSONO TAKASHI
IPC分类号： H04N9/00 , H04N9/24
摘要： PURPOSE:To eliminate dislocation for the display position of a character on a screen by forming a clock signal to set the display position based on an index signal from a color cathode ray tube when the character is displayed. CONSTITUTION:When the character is displayed in a part of the screen, the clock signal to set the display position is formed from an index signal SI which comes from an index system color cathode ray tube 1. Accordingly, when character display is designated, the character is displayed to the determined position on the screen of the cathode ray tube 1. In such a case, since the character display position is determined with the count value output of address counters 12 and 13 as reference and the address counter 12 counts the index signal SI as a clock, the position of the display character is not dislocated in a horizontal direction. Thus, the display position of the character is prevented from being dislocated according to a temperature characteristic or dispersion, etc., in the output of a clock oscillator.

45. 发明专利

JPH01297917A PLL CIRCUIT 失效
公开(公告)号：JPH01297917A
公开(公告)日：1989-12-01
申请号：JP12879088
申请日：1988-05-26
申请人： SONY CORP
发明人： AKAZAWA SUSUMU
IPC分类号： H04N9/24 , H03L7/08 , H03L7/093
摘要： PURPOSE:To reduce the phase error of an output signal by storing variation in the frequency of the input signal for a cycle period, and adding the storage output to the control signal of a VCO for control. CONSTITUTION:A signal of input frequency fi is supplied from an input terminal 1 to a phase comparator 2, the signal from which is supplied to the VCO 5 through an LPF 3 and an adder 4. The VCO 5 leads a signal of output frequency n.fi to an output terminal 6 and the signal is fed back to the comparator 2 through a 1/n frequency divider 7. Then the output signal of the LPF 3 is supplied to a storage circuit 8, the output signal of which is supplied to the adder 4. Thus, the phase error of the output signal can be reduced.

46. 发明专利

JPH01217235A APPARATUS FOR EVALUATING CONDENSING PLATE 失效
公开(公告)号：JPH01217235A
公开(公告)日：1989-08-30
申请号：JP4318288
申请日：1988-02-25
申请人： SONY CORP
发明人： HAYASHI MASAYASU
IPC分类号： G01M11/00 , H01L21/66 , H04N9/24
摘要： PURPOSE:To achieve an easy and efficient evaluation of a condensing plate in a short time, by using a monitor to be driven synchronizing a cathode-ray tube coated with a short-afterglow fluorescent substance. CONSTITUTION:A short-afterglow fluorescent substance such as Y2SiO5 and Ce is applied inside the surface of a cathode ray tube 1. A condensing plate 5 to be measured is put tight on the front of the surface of the cathode ray tube 1. A photodetector 6 is mounted at a specified position of the condensing plate 5 to display an output signal on a monitor 11 through a detection circuit 9. A synchronous signal from a synchronous signal generation circuit 12 is supplied to a driving circuit 4 and the monitor 11 to make the cathode-ray tube 1 synchronize the monitor 11. An electron beam is modulated with a modulation source 2 to draw a raster on the surface of the tube. This enables direct inspection of a part of better condensing and that of less according to the position of the condensing plate, thereby achieving easy and efficient selection of the shape of the condensing plate, a processing method, mounting position of the photo detector and the like in a short space of time.

47. 发明专利

JPH01119192A AUTOMATIC CONVERGENCE CORRECTING CIRCUIT 失效
公开(公告)号：JPH01119192A
公开(公告)日：1989-05-11
申请号：JP27678787
申请日：1987-10-31
申请人： SONY CORP
发明人： ICHIGAYA KOJI , ISHIKAWA YOSHIRO , HOSOKAWA HIROSHI
IPC分类号： H04N9/24 , H04N9/28 , H04N17/04
摘要： PURPOSE:To correct a convergence with a high accuracy by addition-operating detecting signals obtained from plural scanning lines as to one index pattern and obtaining convergence error information. CONSTITUTION:By causing an electron beam 4 to scan so as to cross plural scanning lines SCN1-SCN4 to one index pattern, plural detecting signals S11 as to the plural scanning lines SCN1-SCN4 are obtained, plural detecting signals S11 are addition-operated, and convergence error information S15 is obtained based on an arithmetic result. Namely, the detecting signals S11 to contain noises are detected as to plural scanning lines SCN1-SCN4 as to an index pattern 3, simultaneously, the detecting signals S11 are addition-operated, and the convergence error information S15 is obtained. in such a way, by offsetting noise components against each other, the convergence can be corrected in a short time and, simultaneously, with the high accuracy.

48. 发明专利

JPH01115288A BEAM INDEX TYPE COLOR PICTURE RECEIVER 失效
公开(公告)号：JPH01115288A
公开(公告)日：1989-05-08
申请号：JP27182887
申请日：1987-10-29
申请人： SONY CORP
发明人： MATSUO TOSHIMITSU , TOMINAGA KIYONORI
IPC分类号： H04N9/24
摘要： PURPOSE:To prevent an index error when a wide frequency band video signal is inputted by providing a filter of specific characteristic in a video signal processing circuit before a color switching circuit. CONSTITUTION:An index signal component in a prescribed frequency fi present in an index beam detection signal from an index phosphor strip 65 is taken out by scanning with an electron beam; the chrominance signal switching circuit part 10 is controlled with this signal component in order to sequentially switch three primary colors. In the video signal processing circuit before this part 10, the comb-line filters 2R, 2G, 2B of such a characteristic that at least frequency components of f1/3 and fi are eliminated and others are passed are provided. By these filters 2R, 2G, 2B, such frequency components that disorder the phase of an index signal can be eliminated.

49. 发明专利

JPS6361833B2 失效
公开(公告)号：JPS6361833B2
公开(公告)日：1988-11-30
申请号：JP4570279
申请日：1979-04-13
IPC分类号： H04N9/24

50. 发明专利

JPS63267088A METHOD FOR DRIVING COLOR CATHODE RAY TUBE 失效
公开(公告)号：JPS63267088A
公开(公告)日：1988-11-04
申请号：JP10225587
申请日：1987-04-24
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TOMII KAORU , MIYAMA HIROSHI , KAWACHI YOSHIKAZU , NISHIDA JUN
IPC分类号： G09G1/28 , G09G1/00 , G09G5/04 , H04N9/24
摘要： PURPOSE:To faithfully display a color image by frequency dividing an index signal to 1/n to transform to the index signal of (n) phases and measuring a time difference between the index signal and a B phosphor scanning timing signal obtained by beam scanning the color phosphor. CONSTITUTION:A light from an index signal generating part 2 is received in a photodetector 4 to transform to an electric signal, the frequency of the index signal shaped in a waveform shaping circuit 7 is frequency divided to 1/n (n: integer) in a 1/n frequency dividing circuit 12, the signal of the (n) phases in which the phases are mutually dislocated by 2pi/n is defined to be the index signal to measure an error between the respective index signals and a signal corresponding to the B timing signal. In such a way the error between the index signal and the B timing signal can be allowed to nXp (p is repeated pitch of color phosphor of R, G, B). Thereby, the faithful reproduction of the color picture can be attained by reducing the assembling accuracy of a planar cathode ray tube and parts accuracy.

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