公开(公告)号：EP1042780A2

公开(公告)日：2000-10-11

申请号：EP99921062.8

申请日：1999-05-31

申请人： Koninklijke Philips Electronics N.V.

发明人： TEULING, Dirk, J., A. ,  MISDOM, Johannes, A., C. ,  VANEERDEWEGH, Franky, M., M., E. ,  VERHEES, Johannes, L., M. ,  KENNIS, Roger, P., H.

IPC分类号： H01J29/70

CPC分类号： H04N3/233

摘要： A deflection circuit comprises a deflection correction circuit (Vs) with a controllable active voltage source (Vs) arranged in a loop formed by a deflection coil (Ld), an S-capacitor (Cs), and a flyback capacitor (Cf). The voltage source (Vs) receives a further power supply voltage (Vb2) and a modulating signal (M) to supply a modulating voltage (Vm) varying in response to the modulating signal (M). The active voltage source (Vs) comprises a switching element (S2) which is switched on and off with a frequency which is substantially higher than the deflection frequency to possibilitate waveforms of the modulating voltage (Vm) with a frequency content which is substantially higher than the deflection frequency such that any desired waveform can be generated within the deflection period (Td).

公开(公告)号：EP1518396A1

公开(公告)日：2005-03-30

申请号：EP03727849.6

申请日：2003-05-27

申请人： Koninklijke Philips Electronics N.V.

发明人： VERHEES, Johannes, L., M. ,  GROOT HULZE, Hendrikus, W. ,  KOVACEVIC, Vedran

IPC分类号： H04N3/185

CPC分类号： H04N3/185

摘要： The invention relates to a control circuit (2) for controlling an electrical signal (4) over a load (6) such as a deflection circuit of a Cathode Ray Tube, comprising a first transistor (8) for switching the electrical signal (4) over the load (6), wherein the load (6) is coupled to a collector (10) and an emitter (12) of the first transistor (8), and wherein the control circuit (2) also comprises a resonance circuit (14) which is coupled to a basis (16) and the emitter (12) of the first transistor (8) for driving the first transistor (8), a power supply (18) which is coupled to the resonance circuit (14) for driving the resonance circuit (14), a pulse generating circuit (20) which is coupled to the power supply (18) and the resonance circuit (14), and a processing unit (24) with a memory unit (26). Furthermore the invention relates to a method for adjusting a control circuit according to the invention.

公开(公告)号：EP1210770A1

公开(公告)日：2002-06-05

申请号：EP01969525.3

申请日：2001-07-26

申请人： Koninklijke Philips Electronics N.V.

发明人： MISDOM, Johannes, A., C. ,  VERHEES, Johannes, L., M. ,  HULSHOF, Jozef, J., M. ,  VAN RENS, Frank, J., P.

IPC分类号： H03K17/06 ,  B60Q1/38

CPC分类号： H03K3/0231 ,  B60Q1/382 ,  H03K17/063 ,  H03K17/284 ,  H03K17/302

摘要： A two-terminal switch circuit (1) for inclusion in series with a load (20) across a voltage supply (63) for periodically energizing the load (20) from the supply (63) comprises a controllable switch (4) connected between the terminals (2,3), a resistance (8) and a capacitor (9) connected in series between the terminals (2,3), and a voltage threshold responsive arrangement (26) the output signal/input signal characteristic of which exhibits hysteresis. The voltage threshold responsive arrangement (26) has a signal input (27) connected to the common point (12) of the resistance (8) and the capacitor (9), and a signal output (28) connected to a control input (13) of the controllable switch (4). A power supply input (29) of the voltage threshold responsive arrangement (26) is also connected to the common point (12) of the resistance (8) and the capacitor (9) so that the voltage threshold responsive arrangement (26) is powered from across the capacitor (9). In operation the threshold responsive arrangement (26) closes the switch (4) when the capacitor (9) has charged to above a first threshold voltage and opens the switch (4) when the capacitor (9) has thereafter discharged to below a second threshold voltage which is lower than the first threshold voltage. The cycle then repeats. The part of the switch circuit (1) which excludes the capacitor (9) may be constructed as a unitary circuit component having three terminals. The load (20) may comprise direction indicator lamps (21, 22, 23, 24) of a road vehicle.

公开(公告)号：EP1042780B1

公开(公告)日：2004-08-04

申请号：EP99921062.8

申请日：1999-05-31

申请人： Koninklijke Philips Electronics N.V.

发明人： TEULING, Dirk, J., A. ,  MISDOM, Johannes, A., C. ,  VANEERDEWEGH, Franky, M., M., E. ,  VERHEES, Johannes, L., M. ,  KENNIS, Roger, P., H.

IPC分类号： H01J29/70

CPC分类号： H04N3/233

摘要： A deflection circuit comprises a deflection correction circuit (Vs) with a controllable active voltage source (Vs) arranged in a loop formed by a deflection coil (Ld), an S-capacitor (Cs), and a flyback capacitor (Cf). The voltage source (Vs) receives a further power supply voltage (Vb2) and a modulating signal (M) to supply a modulating voltage (Vm) varying in response to the modulating signal (M). The active voltage source (Vs) comprises a switching element (S2) which is switched on and off with a frequency which is substantially higher than the deflection frequency to possibilitate waveforms of the modulating voltage (Vm) with a frequency content which is substantially higher than the deflection frequency such that any desired waveform can be generated within the deflection period (Td).

公开(公告)号：EP1163722A1

公开(公告)日：2001-12-19

申请号：EP00992071.1

申请日：2000-12-18

申请人： Koninklijke Philips Electronics N.V.

发明人： VERHEES, Johannes, L., M.

IPC分类号： H03K4/64 ,  H03K17/042 ,  H03K17/14

CPC分类号： H03K17/08126 ,  H03K4/64 ,  H03K2217/0036

摘要： An electronic circuit for switching an inductive load (10) by means of a bipolar transistor (1) whereby a switching signal is supplied to the base (5) of a switching transistor (1) via an LRC circuit (6, 7, 9). During switching off the LRC circuit (6, 7, 9) causes a peak voltage at the base (5) of the switching transistor (1). The value of the peak voltage is a maximum when the power dissipation of the switching transistor (1) is a minimum. A regulator circuit (12-17) regulates a current source (18) in a primary winding of a switched transformer (22) in such a way that the peak voltage (Vp) is maximized.

公开(公告)号：EP1332611A1

公开(公告)日：2003-08-06

申请号：EP01969810.9

申请日：2001-10-10

申请人： Koninklijke Philips Electronics N.V.

发明人： MISDOM, Johannes, A., C. ,  DEN OUDEN, Josephus, A., A. ,  SIEREVELD, Adriaan, H. ,  VERHEES, Johannes, L., M.

IPC分类号： H04N3/20

CPC分类号： H04N3/20

摘要： A method and device are described for detecting whether a flash (F) has occurred in the high voltage part of a combined high voltage and horizontal deflection circuit (100) in an apparatus comprising a cathode ray tube (CRT), such as for instance a television set, a monitor, etc. The possible flash is detected by checking the fly-back pulse (70) of the horizontal deflection circuit (16) for deviations that reflect the occurrence of a flash. One possible distortion indicative for the occurrence of a flash is bouncing of the fly-back pulse. Another possible distortion indicative for the occurrence of a flash is collapse of the fly-back pulse. Another possible deviation indicative for the occurrence of a flash is a substantial decrease of the storage time (τS)) of the line deflection transistor (30).