专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH0576020A CONVERGENCE DEVICE 失效
公开(公告)号：JPH0576020A
公开(公告)日：1993-03-26
申请号：JP23280191
申请日：1991-09-12
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SUZUMURA MASAKI , OKADA KAZUO , MITSUDA KATSUMI , MASUDA MITSUYA
IPC分类号： H04N9/28
摘要： PURPOSE:To provide a compact and high efficient convergence device. CONSTITUTION:This device is two pairs of four-pole magnetic filed generating auxiliary dynamic convergence device in which a pair of picture compensating coil 20 and a eight-divided air-core coil 8 are arranged at the lower part of the three sets of static magnetic field generating purity magnet 4, four-pole magnet 5, and six-pole magnet 6 mounted on a cylindrical holder 1. The convergence by which an exact picture compensation at a large screen can be attained can be realized only by adding a simple circuit to the four-pole magnetic field generating auxiliary dynamic convergence coil.

6. 发明专利

JPS55163988A DIGITAL CONVERGENCE UNIT 失效
公开(公告)号：JPS55163988A
公开(公告)日：1980-12-20
申请号：JP7208079
申请日：1979-06-07
申请人： JAPAN BROADCASTING CORP , MATSUSHITA ELECTRIC IND CO LTD
发明人： KAWAMOTO TAROU , KUBO TOKUJI , MOTOTANI KUNIHIKO , MORITA KATSUMI , MITSUDA KATSUMI , TSUJIHARA SUSUMU , TAKEDA MINORU
IPC分类号： H04N9/28
摘要： PURPOSE:To lessen a color shift at the circumference of a screen by storing a convergence correction value, obtained by extrapolation, of the outside of an adjustment point. CONSTITUTION:The convergence correction value of each adjustment point is written in one-frame memory 37 via data reversible counter 2. Next, the contents of memory 37 are sequentially read out and processed by subtracting circuit 32 and adding circuit 33 to find the correction value of the further outside of an adjustment point by extrapolation. Then, the extrapolation value obtained as mentioned above is written at a fixed address in memory 37. Then, the contents of memory 37 are read out and interpolated to generate the correction value of each scanning line, which is D/A-converted 9 to output convergence signal via LPF10. Thus, corrections of high precision can be made on the entire screen by lessening a shift in convergence at the circumference of the screen.

7. 发明专利

JPS5489523A HIGH VOLTAGE GENERATOR 失效
公开(公告)号：JPS5489523A
公开(公告)日：1979-07-16
申请号：JP15905277
申请日：1977-12-27
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： ADACHI KATSUMI , MITSUDA KATSUMI
IPC分类号： H04N3/20 , H04N3/18
摘要： PURPOSE:To economize a picture tube as well as the prevention of its fluorescent screen from burning by obtaining a high voltage from a pulse voltage of horizontal period developed across the secondary winding of a transformer with the primary winding connected in series to a horizontal deflecting coil. CONSTITUTION:The primary winding of pulse transformer 15a is connected in series to horizontal deflecting coil 10, and its secondary winding is to the base of transistor Tr16 via base resistane 17. A pulse signal of horizontal period appearing at the secondary side of transformer 15a allows Tr16 to switch and is applied to high-voltage output Tr39 by way of Trs 21 and 22 and Trs 32 and 35 constituting the monostable multivibrator. Next, Tr39 and coil 43 operate, in the same way as the horizontal deflection circuit, to generate fly-back pulses of horizontal period, which are boosted by fly-back transformer 45 and rectified by double-voltage rectifier circuits 46 to 50, thereby obtaining the anode voltage of picture tube 14.

8. 发明专利

JPS53149715A CORRECTING DEVICE FOR CONTOUR 失效
公开(公告)号：JPS53149715A
公开(公告)日：1978-12-27
申请号：JP6500977
申请日：1977-06-01
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MITSUDA KATSUMI , YAMAMOTO KATSUHIKO , ADACHI KATSUMI , TSUJIHARA SUSUMU , TAKEDA MINORU , SAEKI TAIICHI
IPC分类号： H04N3/32 , H04N5/68
摘要： PURPOSE:To improve the state on a screen, by eliminating over-correction in a large-amplitude signal time by an amplifier with saturation characteristics and by enabling a provided gain control part to suppress the increase in current consumption of an output amplification part due to a signal containing much noise.

你已经成功收藏专利！

检索式保存成功!

IPRDB