JPS59122284A - Deflecting device - Google Patents

Abstract

PURPOSE:To form electric circuits of a deflecting system as ICs and LSIs by constituting deflecting coils by multi-dividing coils and driving the deflecting coil by output signals from digital memories storing deflecting amount, correcting amount, etc. in accordance with the positions of the coils. CONSTITUTION:A synchronizing signal from a synchronizing separator circuit 4 is supplied to a processor 3 and also supplied to a clock signal generating circuit 5. The processor 3 reads out data in unit frame memories S1-S8 in nine digital memories M1-M9 repeatedly in every horizontal period in accordance with clock signals from the clock signal generating circuit 5. The read out one frame signal is supplied to matrix circuits 71-79 through decoders 61-69 and digitally processed by the matrix circuits 71-79 and signals including all the horizontal deflecting amount, miss convergence correcting amount, pin cushion correcting amount, etc. are supplied to coils L1-L9 through D/A converters 81-89 and driving circuits 91-99.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a deflection device applied to a color shadow Wia tube of a color television receiver.

Background technology and its problems In general, electric circuits in color television receivers are becoming integrated circuits and LSIs, but the deflection system uses high-power transistors because the deflection device requires high withstand voltage and large current. Therefore, it was difficult to convert it into an IC or LSI.

OBJECTS OF THE INVENTION In view of the above, an object of the present invention is to provide a deflection device in which the deflection system can be integrated into an IC or an LSI.

Summary of the Invention The present invention comprises a deflection coil made up of multi-divided coils, and a digital memory that stores the deflection amount, misconvergence correction amount, bin cushion distortion correction amount, etc. for each multi-divided coil according to its position. It is designed to be driven by a signal, and the electric circuit of the deflection system can be integrated into an IC or LSI.

Embodiment Hereinafter, one embodiment of the deflection device of the present invention will be described with reference to the drawings.

In Figure 1, (11 shows a color cathode ray tube, (2
) indicates a deflection coil arranged at the neck of this color cathode ray tube fi+.

In this example, there is a pair of upper and lower and symmetrical 4/'
A horizontal deflection coil (2H) consisting of (2Ha) (2Hb) (2Hc) and (2Hd) is
a) (2Hb) (2I-1c) and (2Hd) are multi-divided, for example, 9-divided coils Ll and L with exactly the same number of windings.
2...Constructed by L9.

Below this carp/' (2Ha) (2Hb) (2
The drive circuit for coils (2Hb) and (2Hd) will be explained with reference to FIG.
Since the configuration of each of the 2Hdn is similar to the configuration of the coil (2Ha), only the coil (2Ha) will be described below.

In FIG. 3, '1 + M2...M9 indicate digital memories provided corresponding to the coils L11L2...L9, respectively, and these digital memories M1. M2...M
9 is the sampling number of the horizontal period TH, for example, when it is "8", 8 unit frame memories 5ItS2...
S8, each unit frame memory S1. S2
. . . A frame signal as shown in FIG. 4 is stored in S8. This one frame signal is composed of, for example, 16 pits, the first bit is used as a signal to determine whether it is for horizontal use or vertical use, the next 3 bits are used as a coil number signal for the coil to be supplied, and the next The 3 bits are the deflection amount signal,
The next 3 bits are the misconvergence correction amount signal,
The next 3 bits are used as the bottle cushion distortion correction amount signal, and the last 3 bits are used as other correction amount signals. in this case,
These nine coils L1. Angle θ formed by the horizontal plane passing through the center of the neck of the color cathode ray tube (1) of L2...L9
When θ is θ, θ2...θ9, the current value In as an analog quantity of the deflection amount signal is I, := IoΣ(kn) 1" (21, -1) θ(
i=1.2 . . ) can be approximated by the coil L1. L2...
・The angular distribution of the electric current of L9 and the product of the number of turns N (arevea turn) is as shown in Fig. 5.
...Determined by the position of L9. Also, the amount of misconvergence correction and the amount of bottle cushion distortion correction are similarly determined by the position where the coils L1 * "2...L9 are arranged. Furthermore, the amount of deflection, the amount of misconvergence correction, and the amount of bottle cushion distortion correction are determined respectively. It goes without saying that the value differs depending on the sampling time in the THK period.Other correction amounts are also stored as necessary.

The signals stored in the unit frame memories 51g52, . . ., S8 of the digital memories M1, M2, . Also, the synchronization separation circuit of color television receivers (
4) is supplied to this processor (3), this synchronizing signal is supplied to the clock signal generation circuit (5), and the clock signal from this clock signal generation circuit # (5) is supplied to the processor (3) K. supply This processor (3) is synchronized with the horizontal synchronization signal and has nine digital memories M1. M2... Pigeon's unit frame memory is simultaneously changed from S1 to S2 at predetermined time intervals according to the clock signal.
→ S3 → s4 → s5 → S6 → S7 → S8 → S1, etc. are read out repeatedly in the horizontal period cycle. The signals of one frame read from this digital memory M1 + Kusunoki...M9 are sent to decoders (61) (62)...'I
(,69). This decoder (61
), (6z)...(69) are supplied to matrix circuits (71)(72)...(79)K.

This matrix circuit (71) (72)...(79)
In this case, the symmetric horizontal deflection is fH(t), the asymmetrical component is gH(t), and the left and right pincushion distortion correction is pv(
t), M(t) = NIoΣ(kn) 1ona (21-1
, ) σ・fH(t) 'gH(t) % (.

is performed, and a signal M(t
) is supplied to the D-A conversion circuit (81) (82)...(89) K for converting the digital signal to an analog signal, and the D-4 conversion circuit (81) (82)...(89) Drive circuits (91) (92) respectively drive the deflection current obtained on the output side.
...(99) to coil L1 + "2...L
9 respectively. In this case, since the deflection coils that supply the deflection current are divided into a large number of parts, for example, 9×4=36, the current in each of the drive circuits (91), (92), ... (99) is extremely small, and this drive circuit is It is possible to convert it into an LSI.

In FIG. 3, the unit frame memory S1 of the digital memories M1, M2...M9 is synchronized with the horizontal synchronizing signal pressure.
．． Read S2...S8, digital memo IJ
The horizontal deflection current corresponding to the contents stored in Ml, M2...M9 is applied to the coil L1. Since it is supplied to L2...L9, horizontal deflection can be performed. In this case, misconvergence correction, bin cushion distortion correction, etc. can also be performed at the same time based on pre-stored contents.

As described above, according to the above embodiment, horizontal deflection can be performed based on the contents stored in advance in the digital memory, so that horizontal deflection can be performed digitally. In this case, since the horizontal deflection coil is divided into multiple sections, for example, 36, the drive current for each one can be extremely small, and the electric circuit of this deflection device can be integrated into an IC.
It can be made into LSI.

In the above embodiment, the present invention was applied to a horizontal deflection device, but 1. Of course, the present invention can also be applied to vertical deflection devices in the same way. Moreover, it goes without saying that the present invention is not limited to the above-described embodiments, and can take various other configurations without departing from the gist of the present invention.

Effects of the Invention According to the present invention, a deflection system can be integrated into an IC or an LSI, and a deflection device that can be driven digitally can be obtained.

[Brief explanation of drawings]

1, 4, and 5 are diagrams for explaining the present invention, FIG. 2 is a sectional view showing a main part of an embodiment of the #J deflection device of the present invention, and FIG. 3 is a diagram of the present invention. FIG. 2 is a configuration diagram showing an example of a deflection arm; (1) is a color cathode ray tube, (2H) is a horizontal deflection coil,
(3) is a processor, (81), (8z)...(89
) are D-A conversion circuits, (91), (92)...(
99) is a drive circuit, Ll, L2...L9 are each a coil, Ml, M2...M9 are each a digital memory,
511S2...S8 are unit frame memories, respectively.

Claims (1)

[Claims] The deflection coil is composed of multi-divided coils, and each multi-divided coil is driven by an output signal from a digital memory that stores the deflection amount, misconvergence correction amount, bin cushion distortion correction amount, etc. according to its position. A deflection device characterized by: