-
公开(公告)号：EP1104186B1
公开(公告)日：2005-02-02
申请号：EP00402854.4
申请日：2000-10-16
-
-
公开(公告)号：EP1294180A2
公开(公告)日：2003-03-19
申请号：EP02292049.0
申请日：2002-08-16
摘要： A cathode ray tube video display comprises a cathode ray tube (CRT) for displaying a video signal (Vin) coupled thereto. A cathode ray tube electron beam blanker (201) is coupled to the cathode ray tube (CRT) and is responsive to a blanking trigger signal (GK) for blanking an electron beam (e) within the cathode ray tube (CRT). A blanking controller (200) is coupled to the cathode ray tube electron beam blanker (201) and generates the blanking trigger signal (Gk) for controlling electron beam blanking, wherein the electron beam (e) is blanked for different durations in accordance with one of a hot and cold start condition.
摘要翻译： 阴极射线管视频显示器包括用于显示与其耦合的视频信号（Vin）的阴极射线管（CRT）。 阴极射线管电子束消除器（201）耦合到阴极射线管（CRT），并且响应于消隐触发信号（GK）以消除阴极射线管（CRT）内的电子束（e）。 消隐控制器（200）耦合到阴极射线管电子束消除器（201）并产生用于控制电子束消隐的消隐触发信号（Gk），其中电子束（e）根据一个消隐不同的持续时间 的冷启动条件。
-
4.发明公开SCHALTUNGSANORDNUNG ZUM STEUERN DER SPEISESPANNUNG EINER BILDSIGNAL-ABLENKUNGSEINHEIT 有权电路，用于控制图像信号偏转装置的电源
公开(公告)号：EP1230790A1
公开(公告)日：2002-08-14
申请号：EP00979558.4
申请日：2000-11-14
申请人： Micronas Munich GmbH
发明人： JESCHKE, Alfred
摘要： The invention relates to a circuit arrangement for controlling the supply voltage (Ubvar) of a video signal deflection unit, especially a horizontal deflection unit (1) pertaining to a television apparatus or a monitor. The inventive arrangement comprises a control device (7) that receives a measured frequency signal (A) corresponding to the current frequency value of an input frequency (HSYNC) and a measured voltage signal (B) corresponding to the current voltage value of the supply voltage (Ubvar). The control device can adjust the operating frequency (D) of the video signal deflection unit (1) and the supply voltage (Ubvar) in an interdependent manner, according to said two measured signals (A, B) and in such a way that malfunctioning of the video signal deflection unit (1) is reliably prevented, whereby said operating frequency depends on the input frequency (HSYNC).
-
公开(公告)号：EP1118209A1
公开(公告)日：2001-07-25
申请号：EP99951666.9
申请日：1999-09-29
摘要： An apparatus and a method for protecting a video display device, having an anode and a cathode, against excessive beam current conditions. In particular, the present invention protects the video display device against zero-biasing of the device, wherein the cathode driver circuit is supplied by a plurality of power supplies and the loss of anyone of the power supplies causes zero-biasing of the cathode. The invention provides, in a video display device (100) having an anode (112) and a cathode (102) for generating and controlling beam currents in the display device, a protection circuit comprising: a source of video signals (36); a driver circuit (40) coupled to the source of video signals and the cathode (102), the driver circuit coupled to a driver circuit power supply (+ 12V, + 215V), the driver circuit causing a cathode voltage to be generated on the cathode in response to the video signals and the driver circuit power supply; a high voltage power supply (X1) coupled to the anode (112) for providing high voltage accelerating potential in the display device; and a shutdown circuit (44) coupled to the driver circuit power supply and the high voltage power supply, the shutdown circuit disabling the high voltage power supply if the driver circuit power supply voltage decreases below a threshold level.
-
公开(公告)号：EP0810785A3
公开(公告)日：1999-07-28
申请号：EP97401131.4
申请日：1997-05-23
申请人： THOMSON multimedia
发明人： Hsu, Flame , Wu, Chun Sing , Ng, Seng Huat
IPC分类号： H04N5/63
CPC分类号： H04N3/20 , H01J2229/0015 , H04N5/63
摘要： The most popular method for reducing stray emission effects in a cathode ray tube is to install a bleeder resistor at the flyback transformer of the tube. Such a bleeder resistor is, however, quite expensive. Therefore, the stray emission reduction circuit according to the invention differentiates the H pulse when the TV set is switched from "on" to "standby" which results in a higher duty cycle of the control transistor, implying a lower duty cycle of the horizontal output transistor HOT. This results in a lower voltage at the tuning capacitor and hence lowers the flyback peak voltage at the anode. This results in a drop of the EHT voltage.
摘要翻译： 在阴极射线管中减少杂散发射效应的最流行的方法是在管的反激式变压器上安装泄放电阻器。 然而，这样的泄放电阻器是非常昂贵的。 因此，根据本发明的杂散发射减少电路在电视机从“接通”切换到“待机”时区分H脉冲，这导致控制晶体管的占空比更高，这意味着水平输出的占空比较小 晶体管HOT。 这导致调谐电容器处的电压较低，因此降低了阳极处的反激峰值电压。 这导致EHT电压下降。
-
公开(公告)号：EP0749660A1
公开(公告)日：1996-12-27
申请号：EP95936709.0
申请日：1995-11-27
摘要： Method of discharging a picture display tube (3) in a picture display device, and picture display device provided with a picture display tube discharge circuit, in which the picture display tube (3) is discharged by switching off a generation (20; 23) of an anode voltage (Va) of the picture display tube (3) and by controlling (4) a defined electron current in the picture display tube (3). Prior to generating (4) the defined electron current, the deflection (2) of the electron beam is displaced to beyond a visible part of a display screen (32) of the picture display tube (3). In this way, the picture display tube (3) is discharged without this being accompanied with bright light phenomena visible on the display screen (32). The anode voltage (Va) decreases to a safe value and there is no cold emission and no phosphor burn-in on the display screen (32).
-
8.发明授权Television receiver with provisions for spot burn protection and after-glow suppression 失效以防止光点烧毁设备电视和显像管的抑制余辉
公开(公告)号：EP0521378B1
公开(公告)日：1996-04-17
申请号：EP92110605.0
申请日：1992-06-24
申请人： THOMSON multimedia
发明人： Heidebroek, Wolfgang , Wu, Zeith
CPC分类号： H04N3/20 , H02M2001/0032 , H04N5/63 , Y02B70/16
-
公开(公告)号：EP0449875B1
公开(公告)日：1993-06-09
申请号：EP90900303.0
申请日：1989-12-22
申请人： RANK CINTEL LIMITED
CPC分类号： H04N3/20 , H04N5/257 , H04N17/002
摘要： A signal produced by a telecine suffers from losses and defects caused by difference in response to incident light of different areas of the screen area scanned. These differences may arise from burning of the screen, blemishes, dirt in the system, differences in grain size of phosphor particles, missing particles and losses in the internal optical system of the machine. The invention divides the scanning area into a correction map and devises for each area a correction factor based on the response of that area to incident illumination, where a defect is detected, video data from an adjacent area is substituted. Correction factors are held in a look-up RAM (50) and output to a multiplier (53) where they are multiplied with video data. The video data input to the multiplier (53) may be suppressed and a test pattern may be loaded into the multiplier. Burn at the ends of video lines may be reduced by reducing the intensity and/or dwell time of the scanning spot on any one area of the screen in the vicinity of the line end.
-
-
-
-
-
-
-
-
搜索结果
108 条记录 (耗时 0.016 秒)
