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1. 发明专利

JPH08101658A CRT DISPLAY DEVICE 失效
公开(公告)号：JPH08101658A
公开(公告)日：1996-04-16
申请号：JP19945195
申请日：1995-08-04
申请人： HITACHI LTD
发明人： YOSHIDA MORITOSHI , DOKEN TOMOHIKO , ANTOKU HIDEFUMI
IPC分类号： H04N3/27 , G09G1/04 , G09G1/16
摘要： PURPOSE: To always and properly low band-adjust moire in many synchronizing frequencies by setting moire adjustment amounts proportional to respective sizes of a horizontal synchronizing frequency and a vertical synchronizing frequency on the CRT display device side. CONSTITUTION: A horizontal deflection frequency fH is converted into voltage by an f/V converter 15-1, and is multiplied by constant (a) in a multiplication circuit 16-1, and the voltage in proportion to afH is outputted. Similarly, a vertical deflection frequency fV is converted into voltage by a f/V converter 15-2, and is multiplied by constant (b) in a multiplication circuit 16-2, and the voltage in proportion to bfV is outputted. An addition circuit 17 adds the voltages in proportion to the afH and bfV to generate an output (afH+bfV), and a moire adjustment VR (volume) 9 adjusts the level of the (afH+bfV). That is, when the moire adjustment VR is moved, the voltage is varied within the range from minimum 0 to maximum (afH+bfV).

2. 发明专利

JPH06276461A PICTURE DISPLAY DEVICE 失效
公开(公告)号：JPH06276461A
公开(公告)日：1994-09-30
申请号：JP6031693
申请日：1993-03-19
申请人： HITACHI LTD
发明人： YOSHIDA MORITOSHI , TOMITA KIKUO , SASAKI KAZUYOSHI , DOKEN TOMOHIKO , USU MASAKI
IPC分类号： H04N5/64
摘要： PURPOSE:To easily replace a CRT or a circuit driving the CRT. CONSTITUTION:A CRT section 21 and a circuit section 22 driving the CRT section 21 are formed separately. That is, a CRT 20 is contained in the CRT section 21 and a circuit driving the CRT (not shown) is contained in the circuit section 22. Moreover, the CRT section 21 and the circuit section 22 are connected by a cable having removable connection sections, and a pin connection at a rear part of the CRT 20 is inserted to an insert hole 23 formed to the circuit section 22. Then the CRT section 21 and the circuit section 22 are coupled together by a fixing screw 26.

3. 发明专利

JPH0638059A CRT DISPLAY DEVICE AND POWER SOURCE CONTROL METHOD FOR THE DEVICE 失效
公开(公告)号：JPH0638059A
公开(公告)日：1994-02-10
申请号：JP18812792
申请日：1992-07-15
申请人： HITACHI LTD
发明人： YOSHIDA MORITOSHI , ISOBE AKIO , SASAKI KAZUYOSHI
IPC分类号： H04N3/18
摘要： PURPOSE:To eliminate the disturbance of a picture by stably controlling a high voltage generating circuit in the case of switching the frequency of a horizontal synchronizing signal at the multiscanning system CRT display device. CONSTITUTION:When inputting a control voltage from a picture size switching circuit 12 to an output variable power supply circuit 14 for setting the output voltage at the time of switching a picture size, the output of the output variable power supply circuit 14 is smoothed by connecting an integration circuit 13 between both of circuits, and the output of a high voltage generating circuit 16 is stablized by supplying the output to the high voltage generating circuit 16. Therefore, the disturbance of the picture is eliminated by eliminating the malfunction of a high voltage protection circuit at the time of switching the horizontal frequency.

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