KR950012834B1 - The device and method of compensating geomagnetic field on crt - Google Patents

Abstract

performing a demagnetizing operation in a state where first and second relay drive signals are high potential state and first to third earth magnetic field correction signals are low potential state when a power key is turned on and if a predetermined time elapses, completing the demagnetizing operation by making the second relay drive signal low potential and simultaneously performing first to fourth earth magnetic field correction modes previously established; if a forcibly demagnetizing key is turned on, performing the demagnetizing operation in a state where the second relay drive signal is high potential state and the first to third earth magnetic field correction signals are low potential state; if a predetermined time elapses, completing the demagnetizing operation by making the second relay drive signal low potential and simultaneously performing the first to fourth earth magnetic field correction modes; and if no forcibly demagnetizing key is inputted and an earth magnetic field set key is turned on, circulating by one step the first to fourth earth magnetic field correction modes and setting the circulated modes and performing the set first to fourth earth magnetic field correction modes.

Description

How to calibrate geomagnetic field of monitor and its device

1 is a block diagram of a geomagnetic field correction device of a conventional monitor.

2 is a block diagram of a geomagnetic field correction device of the monitor of the present invention.

3 is a signal waveform diagram of each part in FIG.

4 is a signal flow diagram in the geomagnetic field correction according to FIG.

* Explanation of symbols for main parts of the drawings

1,11: standby power supply part 2,12: device coil part

3,13: power supply unit 4,14: power supply control unit

5,15: microprocessor 6,16: key matrix

7,17: chroma unit 18: current switching unit

19: Geomagnetic field correction unit CPT: Color Brown tube

RY ₁ , RY ₁₁ , RY ₁₂ : Relay D ₁ , D ₁₁ , D ₁₂ : Diode

R ₁ , R ₁₂ -R ₁₈ : Resistance L ₁ , L ₁₁ , L ₁₂ Coil

C ₁ : Capacitor Q1, Q ₁₁ -Q ₁₇ : Transistor

Th: Dummyster

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the correction of a geomagnetic field of a monitor, and more particularly, to a geomagnetic field correction method and a device for minimizing the influence of a geomagnetic field by controlling currents of a device coil and a geomagnetic field correction coil in a large TV.

FIG. 1 is a block diagram of a geomagnetic field correction device of a conventional monitor. As shown in FIG. 1, a standby power supply unit 1 that outputs a rectified constant voltage Vcc when a power source AC is input, and output data of a screen. Operated by the key matrix 6 to be input and the output Vcc of the standby source unit 1, the output K ₁ of the key matrix 6 is checked and the relay drive signal S according to the inspection result. ₁ ) and a microswitch 5 for outputting a character display signal (OSD) and a relay switching for turning on and off the contacts (a) and (b) in accordance with the relay drive signal S ₁ of the microprocessor 5. When the unit 4 and the relay switching unit 4 are connected to (a) and (b), the element coil unit 2 for controlling the current flow and the contact point (a) of the relay switching unit 4 are connected. When (b) is connected, the power supply unit (3) for outputting the voltage (B ⁺ ) and the character display signal (OSD) of the microprocessor (5) are input to the color brown tube (CPT). The element coil part 2 is composed of a chroma part 7 for displaying a ruler. The element coil part 2 is configured by serially connecting a dummyster Th and a coil L ₁ and connecting both ends to a power line in parallel. (4) shows a transistor Q ₁ which is turned on by the relay drive signal S ₁ of the microprocessor 5 and the contacts a and b according to the turn-on of this transistor Q ₁ . The relay RY ₁ is turned on.

Referring to the operation of the conventional circuit configured as described above are as follows.

First, as the power source AC is input, the microprocessor 5 in which the voltage Vcc of the standby power supply unit 1 is inputted checks the output K ₁ of the key matrix 6.

At this time, when the power key is input to the key matrix 6, a high potential relay driving signal S ₁ is output from the microprocessor 5 to the relay switching unit 4, and a character display signal is displayed on the chroma unit 7. (OSD) is output. Accordingly, in the relay switching unit 4, the transistor Q ₁ is turned on to drive the relay RY ₁ , and the chroma unit 7 displays channel related data input through the key matrix 6 through the CPT. .

In addition, as the relays RY ₁ contacts a and b of the relay watching part 4 driven by the relay driving signal S ₁ are connected, and the power source AC is input to the power supply unit 3. The element coil portion 2 controls the current flow. That is, when the power is turned on, current flows through the dummy coil Th and the coil L _{1 of} the element coil part 2 and the resistance value of the dummy coil Th increases with temperature as time passes. As a result, almost no current flows in the element coil portion ₂ , and resistance is generated when the current flows through the coil L ₁ , thereby demagnetizing the magnetic field of the monitor.

However, such a conventional circuit has a problem in that the color of the screen is not clear in the case of a large size TV because the power is turned on and the resistance of the thermistor is large so that the current is not open even though little current flows.

In view of the above problems, the present invention adds a relay to the element coil and controls the geomagnetic field correction circuit composed of transistors with a microprocessor, thereby minimizing the influence of the geomagnetic field due to current flow and displaying a clear screen of the monitor for displaying a clear screen. The invention is a calibration method and an apparatus thereof, which will be described below with reference to the accompanying drawings.

2 is a block diagram of the geomagnetic field correction device of the monitor of the present invention, as shown therein, the standby power supply unit 11 for outputting a constant voltage (Vcc) in response to the input of the power (AC), and controls the state of the TV system The key matrix 16 for selecting a key to be operated and the output Vcc of the standby power supply unit 11 are driven to check the output K ₁ of the key material 16. When turning on the relay driving signal (S ₁₎ and a certain time sikimyeo on a relay drive signal (S _2), the mode signal the microprocessor 15, the microprocessor 15 to output a (S ₃ -S ₅₎ The chroma unit 17 which displays the selection state of the key matrix 16 in the CPT according to the output (OSD) of the control unit, and the AC power source unit 13 in accordance with the relay drive signal S ₁ other than the microprocessor 15. (AC) power supply control unit 14 for switching the supply and the relay mechanism of the microprocessor 15 Signal (S ₂₎ according to the direction of current in accordance with the turn-on current, a switching unit 18 for the current flow in the coil element 12, the mode signal (S ₃ -S ₅₎ of the microprocessor (15) And the magnitude of the geomagnetic field correction unit 19 to minimize the influence of the geomagnetic field. The current switching unit 18 has a relay drive signal S2 of the microprocessor 15 through a resistor R11. The transistors (Qu) that turn on and off as input to the base and the outputs of the transistor (Q11) and other outputs of the transistor (D11) connected in parallel to the coil are gradually turned on (c) and (d). The power supply switching unit 14 includes a transistor Q ₂ , a letter box R ₂ , a diode D ₁₂ , and a relay RY for controlling the current flow of the element coil part ₁₂ . ₁₂ ) is connected in the same manner as the current switching unit 18 so as to turn on and on the supply of power AC to the power supply unit 13.

The geomagnetic field correction unit 19 connects the bases of the transistors Q ₁₃ , Q ₁₄ and Q _1s and Q ₁₆ to which the emitters are commonly connected, respectively, and connects the other connection points to the resistors R ₁₃ , The transistor connected to the output terminals S ₃ and S ₅ of the microprocessor 15 through R ₁₇ and connected in parallel between the emitters with a coil L ₁₂ and a capacitor C ₁ connected thereto. Q _13), by a common connection to the collector of the (Q _1s) belonging to point to the jeoham the connection point (R _l8) voltage (B ⁺⁾ through the common connecting the emitter of said transistor _{(Q 14), (Q 16} ) a transistor (Q ₁₇₎ connected to the output terminal (S ₄₎ of the microprocessor (15) baeyiseu the through jeoham (R ₁₆₎ over the ground also as well as a resistance (R ₁₅₎ via a resistor (R _4), the connection points The emitter of transistor Q ₁₇ is grounded.

The operation and effects of the geomagnetic field correction device of the monitor according to the present invention configured as described above will be described in detail with reference to the signal waveform diagram of FIG. 3 and the FIG. 4 signal correction diagram of the geomagnetic field.

First, as the power source AC is input, the standby power supply unit 11 outputs a constant voltage Vcc to the microprocessor 15, and thus the microprocessor 15, which is in a standby state, is output from the key matrix 16. Check (K ₁ ) and output relay drive signals (S ₁ ), (S ₂ ) and geomagnetic field correction signals (S ₃ ), (S ₄ ), (S ₅₁ ) according to this output (K ₁ ). In addition, the character display signal OSD is output in accordance with the setting mode.

At this time, the output (K ₁ ) of the key matrix 16 is checked and if the power key is turned off when the power control signal is turned on, the microprocessor 15 may relay the drive signals S ₁ , S ₂ and the geomagnetic field correction signal ( S ₃ -S ₅ ) outputs a low potential to turn off the system, and when the power key is on, the microprocessor 11 sets the relay drive signal S ₁ to high potential as shown in FIG. 3 (e). In addition, as shown in FIG. 3 (d), the relay drive signal S ₂ is output at a constant time (element time) with high potential, and the geomagnetic field correction signals S ₃ -S _{5 are} shown in FIGS. As shown in FIG. 3 (c), the output is performed at a low potential, and the chroma unit 17 processes the character display signal OSD to display channel-related data as characters in the color-brown tube CPT.

Accordingly, the power supply control unit 14 to which the high-potential relay driving signal S ₁ is input is driven by the relay RY ₁₂ , in which the transistor Q ₁₂ is turned on and the voltage B + is input, and accordingly the relay RY ₁₂ ) The contacts (a) and (b) are connected and the power source (AC) is input to the power supply unit 13, so the TV system is turned on, and a high potential relay drive signal (S relay drive signal) is input for a predetermined time. Since the transistor Q _u is turned on and the currents c and d of the relay RY _u are connected to each other, the current switching unit 18 is connected to the coil L ₁₁ of the element coil unit 12. Flow. The 3 (d) relay driving signal as shown in Fig. In yiettara coil (L _u) to sikimyeo element to the magnetic field generated in the color bra branches (CPT) and the magnetic field is generated, by a certain period of time the microprocessor 15 When (S ₂ ) outputs at a low potential, the transistor Q ₁₁ of the current switching unit 18 turns on, so that gradually (c) and (d) of the relay RY ₁₁ are turned off so that the element coil unit 12 Cut off the current flow in the coil (L _u ).

At this time, according to the geomagnetic field correction mode (Mode _O- Mode ₄ ) previously set by the viewer as shown in Table 1, the microprocessor 15 performs the geomagnetic field as shown in FIGS. 3 (a) to 3 (c). The correction signals S ₃ , S ₄ , and S ₅ are output to the geomagnetic field correction unit 19.

That is, when the geomagnetic field correction mode (Mode _O ), the microprocessor 15 outputs all of the geomagnetic field correction signals S ₃ , S ₄ , and S ₅ at low potential so that the transistors of the geomagnetic field correction unit 19 When (Q ₁₃ -Q ₁₇ ) is turned on and no current flows to the geomagnetic field correction coil L ₁₂ , and the geomagnetic field correction mode (Mode ₁ ), the microprocessor 15 generates the geomagnetic field correction signal S ₃ . only to the output to the high potential the transistor _{(Q 13), (Q 16} ) is, by turning-on the direction a _{^{(B + → R 18 → L}} 12 → Q 16 → R 14) is a small current flows into corrects the device state.

At this time, when the geomagnetic field correction mode (Mode ₂ ) is set and the geomagnetic field correction signals S ₃ and S ₄ of the microprocessor 15 are output at high potential, the transistor Q ₁₃ of the geomagnetic field correction unit 19 is output. (Q ₁₆ ), (Q ₁₇ ) turns on and flows into the low (R ₁₄ ) flows through the resistor (R ₁₅ ) and the transistor ₁₇ to increase the amount of current (current flow; B ⁺ → R ₁₈ → Q ₁₃ → L ₁₂ → Q ₁₆ → R ₁₅ -Q ₁₇ ).

Meanwhile, when the geomagnetic field correction mode (Mode ₃ ) is jetted and only the geomagnetic field correction signal S ₅ is output at high potential from the microprocessor l5, the transistors Q ₄ and Q _{15 of} the geomagnetic field correction unit 19 are output. When turned on, a small amount of current flows in the B direction (B ⁺ → R ₁₈ → Q ₁₅ → L ₁₂ → Q ₁₄ → R ₁₄₎ to correct the device state.

In this case, when the microprocessor 15 outputs the geomagnetic field correction signals S ₄ and S _{5 at high potential} by setting the geomagnetic field correction diagram MOde ₃ , the transistors Q ₁₄ , Q ₁₅ , and Q ₁₇ ) is turned on and a large amount of current flows in the B direction (B ⁺ → R ₁₈ → Q ₁₅ → L ₁₂ → Q ₁₄ → R ₁₅ → Q ₁₇ ) to correct the device state.

Therefore, when the state of the geomagnetic field correction unit 19 according to the output (S ₃ -S ₅ ) of the microprocessor 15 is displayed as shown in Table 1 below.

TABLE 1

If the microprocessor 15 checks the output K _{1 of} the key matrix 16 and inputs a forced element key to the key matrix 16 when there is no power control signal, the microprocessor 15 causes the third process to be performed. (a) As shown in FIGS. 3 to 3 (d), the geomagnetic field correction signals S ₃ -S ₅ are output at low potential and the relay drive signal S ₂ is output at high potential for a predetermined time.

At this time, the current switching unit 18 has transistors (Q _l1) is turned-on by the relay current to the contact point (c), (d) a coil (L _u) of the element coil 12 by the connection of the (RY _u) Flows to generate an electric field to perform a device operation for a predetermined time, and the geomagnetic field correction unit 19 is turned on and the transistor (Q ₁₃ -Q ₁₇ ) does not flow current to the coil (L ₁₂ ).

Accordingly, after a predetermined time has elapsed, the microprocessor 15 outputs a low-potential relay drive signal S ₅ to the current switching unit 18 to complete the device operation, and the user sets the geomagnetic field correction unit 19. Table 1 and the transistors Q ₁₃₁ Q ₁₇ are turned on and off in accordance with the geomagnetic field correction mode to perform the device state correction operation.

In addition, if there is no input of the forced element key, the earth magnetic field setting key input is checked. If there is no earth magnetic field setting key input, the earth magnetic field correction is completed. If there is an earth magnetic field setting key input, the microprocessor 15 switches the earth magnetic field correction mode to 1. Set by step by step (Mode _O → Mode ₁ Mode ₂ → Mode ₃ → Mode ₄ → Mode ₅ → ··) and set the geomagnetic field correction signal (S ₃ −) according to the corresponding mode as shown in [Table 1]. S ₅ ) is output to the geomagnetic field correction unit 19 to change the current amount of the coil L ₁₂ to correct the device state.

As described in detail above, the geomagnetic field correction method and apparatus of the present invention control the element coil and the geomagnetic field correction circuit to correct the influence of the magnetic field not completely demagnetized by the element coil, thereby minimizing the influence of the geomagnetic field It has the effect of providing the color quality.

Claims (5)

When the potential key is on when the power control key is input, the relay drive signals (S ₁ ) and (S ₂ ) have a high potential and the earth magnetic field correction signals (S ₃ -S ₅ ) have a low potential to perform device operation. When the elapsed time, the relay drive signal (S ₂ ) to the low potential to complete the operation of the device and perform the set geomagnetic field correction mode (Mode _O- Mode ₄ ), and when there is no power control key input forced device key on If the state, the relay drive signal (S ₂ ) is a high potential, the geomagnetic field correction signal (S _3- S ₅ ) is a low potential to perform the device operation and after a certain time the relay drive signal (S ₂ ) to a low potential device operation and also the complete addition prophet set based correction mode (mode _O -Mode ₄₎ step, and a force element based key correction mode setting earth magnetic prophet key is turned on when there is no input for performing (mode _O -Mode ₄₎ 1 step-by settings and perform a system calibration mode (mode _O -Mode ₄₎ prophet set circulation Correction method is characterized by the monitored prophet outer phase system. The method of claim 1, wherein in the geomagnetic field correction mode (Mode _O ), all of the geomagnetic field correction signals S ₃ -S ₅ are set to a low potential to block current flow, and the geomagnetic field correction in the geomagnetic field correction mode (Mode ₁ ). signal (S ₃₎ only with high potential coil (L ₁₂₎ in one direction (a direction) and generate a current flow in a small amount, prophet when earth magnetic correction mode (mode ₂₎ based bojeom signal (S _3), (S ₄ of ) the classic up and generates a single direction (a direction), the current flow of a large amount of the coil (L _12), earth magnetic beujeong mode (mode ₃₎ message field correction signal (S _5), only the high potential coil (L ₁₂ ) the other one direction (B direction) and generate a current flow in a small amount, earth magnetic correction mode (mode ₄₎ during earth magnetic compensation signal _{(S 4), (S 5} ) the classic up and other of the coil (L ₁₂₎ of the A method of compensating a geomagnetic field of a monitor that performs a geomagnetic field correction of an element state by generating a large amount of current flow in one direction (B direction). Standby power supply unit 11 for outputting a positive voltage (Vcc) according to the input power (AC), a key matrix 16 for selecting a key for setting the operating state of the TV system, and the standby power supply unit 11 Check the output (K ₁ ) of the key matrix 16 by receiving the output (Vcc) of the key, and if the power key is on or there is a forced element key input or a magnetic field setting key input, the setting mode (Mode _O- Mode ₄ ) In addition to the output of the relay drive signal (S ₁ ), (S ₂ ) and geomagnetic field correction signal (S _3- S ₅ ), the microprocessor (15) for outputting the character display signal (OSD) of the corresponding mode, and A chroma unit 17 for processing the character display signal OSD of the microprocessor 15 to display characters on the color brown tube CPT, and a power supply unit according to the relay drive signal S ₁ of the microprocessor 11. 13 is a power supply control unit 14 for controlling the supply of power (AC) to the relay, and the relay drive signal of the microprocessor 15 The current switching unit 18 controls the current flow of the element coil unit 12 according to (S ₂ ), and the amount of current according to the geomagnetic field correction signal (S ₃ -S ₅ ) of the microprocessor 15. The geomagnetic field correction device of the monitor, characterized in that consisting of a geomagnetic field correction unit 19 for correcting the geomagnetic field of the device state. 4. The transistor according to claim 3, wherein the current switching unit 18 includes a transistor Q _{11 which} is turned on and off in accordance with the relay drive signal S ₂ of the microprocessor 15, and a turn on / turn of this transistor Q ₁₁ . And a relay (RY ₁₁ ) for controlling the current flow of the element coil portion 12 by switching the connections of the contacts (c) and (d) upon off. 4. The geomagnetic field correction unit 19 of claim 3 is connected to the output terminals S ₃ and S ₅ of the microprocessor 15 through the storages R ₁₃ and R ₁₇ by common connection between the bases. The emitters of the connected transistors Q ₁₃ , Q ₁₄ and Q ₁₅ and Q ₁₆ are commonly connected, and a coil L ₁₂ and a capacitor C ₁ connected in parallel between the connection points are connected to each other. Q ₁₃ ), the collector of (Q ₁₅ ) is connected in common and its connection point is connected to the voltage (B ⁺ ) through the resistor (R ₁₈ ), and the collector of the transistors (Q ₁₄ ), (Q ₁₆ ) is connected in common to ground the collector of one transistor (Q ₁₇₎ connected to the base via a resistor (R ₁₆₎ via the junction box and the well resistance (R ₁₅₎ to the resistor (R ₁₄₎ to the output terminal (S ₄₎ of the microprocessor (15) And the emitter of the transistor (Q ₁₇ ) connected to ground.