KR19980077099A - Apparatus for Implementing Peripheral Magnetic Field Information in Television Receiver and Its Operation Method - Google Patents

Abstract

The present invention relates to an apparatus and method for realizing surrounding magnetic field information in a television receiver (hereinafter referred to as TV). In order to achieve the above object, the memory unit 220, the character display device 500, The method further includes a Gaussian meter 230 for measuring magnetic flux density in a TV having a control device 200 for controlling various operations. In the second viewing process, the Gaussian meter measures the surrounding magnetic field and stores it in the memory unit 220, and when the user wants to know the geomagnetic information, the controller 200 In the first and second processes, if a method of implementing peripheral magnetic field information including a third process of displaying magnetic field information stored in a memory unit on a TV screen is provided, the user may perform an offset correction operation on the influence of the surrounding magnetic field. By checking the necessary information, it is possible to watch a clearer TV screen.

Description

Apparatus for Implementing Peripheral Magnetic Field Information in Television Receiver and Its Operation Method

The present invention relates to an apparatus and a method for implementing ambient magnetic field information in a television receiver (hereinafter referred to as a TV). The present invention relates to an apparatus and a method for implementing a function of a TV to identify a difference with an actual surrounding magnetic field.

In general, the main components of a TV include a microprocessor that generally controls the operation of the TV, a tuner that receives and tunes a broadcast signal from an antenna, an image processor that processes a video signal of a broadcast signal tuned by the tuner, and a processing unit. And a horizontal / vertical synchronization processor for biasing the video signal to be displayed on the screen of the CRT screen, and an OSD generator for separately displaying characters on the CRT screen.

In addition, the TV includes a voice processor for processing a voice signal of a broadcast signal, a voice amplifier for amplifying the voice signal processed by the voice processor to a predetermined level, and a speaker for outputting the amplified voice signal. And a key input unit, which is a means for inputting an operation mode of the TV, and a memory unit for storing data to be processed by the microprocessor.

Looking at the CRT in detail as follows.

Since color TVs reproduce various colors by combining three colors of red, green, and blue, the color CRT has a three-color fluorescent surface in which electrons protruding from three electron guns collide with each other. Red, green, and blue phosphors on the phosphor surface form a pixel in a pair (called a dot trio).

Inside the fluorescent surface, there is a shadow mask having holes penetrated by electrons, and the hole serves to only touch the red phosphor with the electron beam from the red electron gun. By the way, when the focus adjustment is good, the diameter of the electron beam is large enough to cover only about four holes of the mask, and the electron beam emitted from the electron gun emits four sets of phosphors at the same time.

That is, the focusing of the image is determined by how exactly the electron beam emits fewer phosphors at one time. Therefore, the function of canceling the influence of an external magnetic field (geomagnetism, etc.) affecting not only the diameter of the electron beam but also its path is an essential function in the CRT which emphasizes image quality.

By installing the coil around the CRT and flowing the current appropriately, the magnetic field generated by the coil cancels out the surrounding magnetism or degaussing the shadow mask or the like. Conventional TVs use standard geomagnetic values to set the current through the device coil.

In the case of mass production, it is assumed that the first-class standard geomagnetic values are as described above. The problem is that it is impossible to know which of the produced TVs will be sold out, so it is necessary to set the current value of the device coil corresponding to the local magnetism value again in the area where the TV is watched. However, there is a problem that a repairer who resets the current value to be supplied to the device coil in the field suffers a few trials and errors since the repairing TV does not know what standard value is set when the TV is manufactured in the factory.

In addition, since the magnetic field is a vector amount, the magnetic field has a different value depending on the latitude. This is especially true in Chile, which stretches long from north to south. Earth magnetism is not constant but is changing periodically and irregularly. Diurnal change of the geomagnetism occurs mainly by the current of the ionosphere, and there is a problem that the geomagnetism changes due to the increase and decrease of the solar wind.

Therefore, there is a need to inform the user (repairer) of the changing magnetic field information and the magnetic field information assumed at the time of manufacture of the TV.

The present invention for solving the above problems, in order to check the difference between the standard geomagnetism assumed to cancel the magnetic field affecting the path of electrons hitting the CRT screen and the actual surrounding magnetic field in the TV viewing site, To provide a device and method for embedding a magnetic measuring device capable of detecting magnetic flux density in a TV, storing measured magnetic field information in a memory unit, and displaying various magnetic field information on a CRT screen through a character display device. There is this.

1 is a block diagram of an apparatus for implementing magnetic field information in a television receiver according to an embodiment of the present invention.

2 is a flowchart for a method of implementing peripheral magnetic field information according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: tuner 200: microprocessor

210: key input unit 220: memory unit

230: Gauss meter 500: Character screen display (OSD) generator

700: Water Hall (CRT)

A feature of the present invention for achieving the above object is a Gaussian meter for measuring the magnetic flux density in a TV having a memory unit 220, a character display device 500, and a control device 200 for controlling various operations ( And a first process of storing a value assumed to be a standard geomagnetism in the memory unit 220 at the time of television production, and at the place where the television is watched, the magnetic measuring device generates a peripheral magnetic field. The control unit may measure the magnetic field information stored in the memory unit 220 in the first and second processes so that the user knows the magnetic field information. Including a third process of displaying on the screen.

An additional feature of the present invention for achieving the above object is that in the second process, the information of the peripheral magnetic field is repeatedly measured and stored at predetermined time intervals, and if the deviation of the repeatedly measured peripheral magnetic field values is within a predetermined error, The set value of the time interval to be repeatedly measured further includes the step (S43) of resetting to a predetermined value larger.

Another feature of the present invention for achieving the above object is, if the deviation of the peripheral magnetic field values repeatedly measured in the second process is larger than a predetermined error, storing the detection time corresponding to the magnetic field value in the memory unit ( S44) is further included, and the set value of the time interval for repeatedly measuring the information of the magnetic field is further included in the step S45 of resetting to a value smaller than a predetermined value.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of a TV receiver according to an embodiment of the present invention. When describing only the characteristic parts thereof, a Gaussian meter 230 for detecting a peripheral magnetic field (magnetic flux density) such as a magnetic field, and the Gaussian meter The apparatus 231 for converting the numerical value measured in the digital form to the form that can be stored in the memory unit 220, the microprocessor 200 for controlling the point of time when the Gaussian meter 230 detects the surrounding magnetic field, OSD control unit 500 for displaying the magnetic field information on the screen of the CRT (700) under the control of the microprocessor.

The Gaussian meter 230 measures the magnetic flux density using the Hall effect of a semiconductor such as germanium. When a magnetic field to be measured at right angles is applied to the surface of the Hall element, a Hall voltage appears in the element, and the Hall voltage is proportional to the magnetic flux density. Some instruments use a magnetic force to detect a magnetic field, but more preferred is a Gaussian meter that detects the magnetic field by converting it into an accurate voltage.

Hereinafter, with reference to the accompanying drawings, Figure 2 looks at a preferred embodiment of the operation method according to the present invention.

2 is a flowchart for a method of implementing peripheral magnetic field information according to an embodiment of the present invention.

If the TV is connected to a power source, the microprocessor determines whether the user has turned on the self-measurement function through the key input unit 210 (S10). If the determination is not turned on (No), the function provided by the present invention does not operate.

If it is turned on (YES), the microprocessor 200 sends a control signal to the Gaussian meter 230 to measure the surrounding magnetic field (S20). The value measured by the Gaussian meter is input to the microprocessor 200 via the A / D conversion 231 and stored in the memory unit 220 as a variable called a local reference value (S21).

Then, the microprocessor 200 determines whether the user has turned on a function of displaying the magnetic field information through the key input unit 210 (S30). If the determination result is turned on (Yes), the peripheral magnetic field information data such as the standard geomagnetic value at the time of manufacture and the local reference value, which are stored in the memory unit 210, are accessed, and the OSD generation unit 500 is used. The CRT 700 is displayed on the screen (S31).

If the text display function is not turned on (No), the microprocessor 200 determines whether it is time to measure the surrounding magnetic field again, that is, whether the time of the repeated measurement interval has elapsed (S40). This time interval may be, for example, three hours. Of course, this value can be set by the user through the key input unit. Also, if you do not want to repeat the measurement, you do not have to turn on the self-measurement function at first.

If time elapses, i.e., reaches (Yes), the peripheral magnetic field is measured as described above (S41), and the microprocessor 200 determines whether the difference between this measured value and the previously measured reference value is smaller than a predetermined error ( S42).

This step is to check whether the surrounding magnetic field has changed significantly during the measurement interval from the reference value, which can be seen as an average value. The predetermined error value is preferably a change value of magnetic flux density that causes a change in focus that the viewer cannot feel.

As a result of the determination, if the difference between the two values is smaller than the predetermined error (Yes), the microprocessor 200 resets the measurement time interval to be larger by the predetermined value (S43). This means that if there is no change in the magnetic field, it is not necessary to measure the magnetic field to adjust the focus. Any number that increases the time interval will usually be 1.5 times the previous number.

As a result of the determination step (S42), if the measured magnetic field value is different from the previously measured magnetic field value (reference value or average group value, etc.) by more than a predetermined error (or predetermined limit) (No), the numerical value of the measured magnetic field And store the measurement time (S44). In this way, the user can know the time zone during which the magnetic field is greatly changed by the text display function, so that appropriate actions can be taken.

Then, the time interval for repeated measurement is reduced by a predetermined value and reset (S45). This is because it is necessary to further identify the time zone in which the external magnetic field is generated.

In order to achieve the object of the present invention, a method of repeating the measurement of the peripheral magnetic field according to the user's function key on setting has been mainly described. However, the present invention is not limited thereto, and many applications will be possible.

The present invention, which operates as described above, provides a function of displaying a standard geomagnetic value set at the time of manufacture and a measured value of the surrounding magnetic field in the local area of TV viewing on a CRT screen, thereby adjusting the focus on the influence of the magnetic field. It has a very beneficial effect, and also provides a function to store and inform the time when the surrounding magnetic field is changed significantly than usual, so that the user has a beneficial effect on investigating and taking action on the surrounding cause of the time zone.

Claims (2)

In a television equipped with a storage unit 220 for storing magnetic field information, a character display device 500 for displaying characters on a screen of the water pipe 700, and a control device for controlling various operations, the surrounding magnetic field at a viewing place is provided. And a magnetic measuring device for measuring the magnetic flux density to continuously measure, store, and display on the screen. A method of realizing information in a television having a magnetic measuring device for measuring magnetic flux density: A first process of storing a value assumed to be a standard geomagnetism in a specific storage means at the time of television production; A second process of storing the data in a specific area of the storage means 220 in which the magnetic measuring device measures the surrounding magnetic field and stores the data at the place where the television is watched; And a third process of displaying the magnetic field information stored in the first and second processes on the receiving tube (700) screen so that the user knows the magnetic field information.