KR970007474B1 - Television system equipped with channel switching function - Google Patents

Abstract

A television having a screen image change function is disclosed. An image processing unit extracts an image signal from a broadcast signal. A key input unit(18) provides a screen image change signal according to a user's command signal. A change data memory(20) stores a number of change data according to the screen image change signal. A microcomputer(24) provides a screen image change control signal based on the change data if the screen image change signal is inputted. A screen image change unit(26) operates a switch in order to change the screen image according to the screen image change control signal. Thereby, when a repairman is under repair of a television set, the repairman can easily watch the screen of the television set through a mirror by changing the screen image.

Description

TV with screen switching function

1 is a block diagram showing the configuration of a general deflection circuit and a deflection yoke;

FIG. 2 is a diagram showing an example of a screen displayed on a CRT as a current is applied to the deflection yoke shown in FIG.

3 is a block diagram of a television having a screen switching function according to an embodiment of the present invention.

4 is a circuit diagram showing an example of the screen switching means shown in FIG.

5A to 5D show an example of a screen switching state displayed on the CRT according to the switch connection state of the screen switching means shown in FIG.

* Explanation of symbols for main parts of the drawings

10: vertical deflection portion 12: deflection yoke

14: horizontal deflection portion 16: horizontal position adjustment portion

18: key input means 20: switching data storage unit

22: receiver 24: microcomputer

26: screen switching means

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television having a screen switching function. More particularly, the present invention relates to a television having a screen switching function in which a single screen can be switched to various screens at various angles by changing the scanning direction of the television in a plurality of directions.

Currently, the CRT (Cathod Ray Tube) of the commercialized and sold television hits a predetermined phosphor with three electron beams radiated from the electron gun, and the red (R), green (G), and blue (B) 3 It is a structure that reproduces an arbitrary screen by emitting light accurately at a predetermined ratio.

In this way, for the screen reproduction, any one screen is reproduced as the electron beam radiated from the electron gun is scanned from the corner of the screen to the corner by the deflection yoke of the deflection circuit. As shown in FIG. 1, as the vertical synchronization signal is input, the output terminal of the vertical deflection portion 10 for outputting a predetermined vertical deflection signal is deflected by a straight electron beam radiated from the electron gun to impinge on the phosphor. One end of the vertical deflection coil of the deflection yoke 12, and the other end of the vertical deflection coil is connected to the input end of the vertical deflection section 10, while the horizontal deflection of the deflection yoke 12 One end of the coil is connected to an output end of the horizontal deflection portion 14 for outputting a predetermined horizontal deflection signal as the vertical synchronous signal is inputted, and the other end of the horizontal deflection coil. Appropriately moving the position of the raster by subtraction a direct current to the horizontal deflection coil is configured to be the horizontal position adjusting section 16 is connected to to hold a center.

Operation by the above configuration is as follows.

First, the direction of the current output from the vertical deflection portion 10 and flowing in the vertical deflection coil of the deflection yoke 12 is fixed in the 'ga' direction, and is output from the horizontal deflection portion 14 to output the deflection yoke ( Since the direction of the current flowing in the horizontal deflection coil of 12) is always fixed in the 'I' direction, it is always displayed on the CRT only in a certain type of screen, that is, a screen shape as shown in FIG.

For this reason, for example, if you need to adjust the screen status on the rear of the television or if you need to repair the television, install a mirror on the front of the television and watch the screen on the mirror to see if the repair is correct. However, the screen reflected on the mirror is symmetrical with the screen displayed on the CRT, which may cause confusion for the repairman.

In addition, in the case of constructing a plurality of television monitors in the interior, it is inconvenient to move the television monitor directly in a desired direction in order to watch the television in another direction (for example, in a direction divided from the current forward direction to the left or right). have. In addition, when photographing works of art using a video camera should be viewed only from a single angle at the time of playback, because it is very monotonous, you will immediately feel the demonstration and can not watch for a long time.

Accordingly, the present invention has been made in view of the above circumstances, and an object thereof is to provide a television with a screen switching function so that a screen displayed on a CRT can be switched to a screen state in various directions by changing the scanning direction of the television in various directions. In providing.

In order to achieve the above object, a television having a screen switching function according to an embodiment of the present invention is provided with a video processing means for extracting an image signal from a broadcast signal selected by a tutor, and then displaying the image signal on a CRT. In the revision, key input means for outputting a predetermined screen switching signal so that the screen can be switched in the direction that the viewer wants to watch with a predetermined screen switching key, and corresponding to the screen switching signal output from the key input means A switching data storage unit having a plurality of switching data stored therein; a microcomputer for outputting a screen switching control signal in a corresponding switching direction based on the switching data of the switching data storage unit when a screen switching signal is input from the key input unit; In accordance with the screen switching control signal from the microcomputer, the screen displayed on the CRT is moved in a predetermined direction. It is configured to further provide a screen switching means for switching driving to switch to.

According to a preferred embodiment of the present invention, the screen switching means is installed at the vertical deflection coil end of the deflection yoke and switched according to the screen switching control signal of the microcomputer to perform the screen switching operation in the vertical direction. A first switching unit for changing the current flow, and installed at the horizontal deflection coil end of the deflection yoke and switched in accordance with the screen switching control signal of the microcomputer to perform the screen switching operation in the horizontal direction. It is composed of a second switching unit for changing the.

In addition, there are four screen states that can be switched by the screen switching operation of the screen switching means, and the screen is switched horizontally and / or vertically by 180 ° C.

According to an embodiment of the present invention configured as described above, when the viewer manipulates the screen switching key on the key input means to switch the screen displayed on the CRT in a predetermined direction, the microcomputer based on the switching data of the switching data storage unit. The screen switching control signal is output, and the screen switching means switches the screen in a predetermined direction accordingly.

Hereinafter, with reference to the accompanying drawings will be described the present invention in more detail.

3 is a block diagram of a television having a screen switching function according to an embodiment of the present invention, reference numeral 18 has a predetermined screen switching key and it is desirable to switch the screen currently displayed on the CRT in a predetermined direction. In this case, the screen switching key is operated to select a desired switching direction.

In this case, the screen switching key may be configured as a toggle switch.

On the other hand, the key input means 18 can be used to output not only a normal screen switching signal but also a volume control signal, a channel selection signal, a power on / off signal, and the like.

20 shows switching data for switching direction recognition so that when a predetermined screen switching signal is output from the key input means 18, the microcomputer 24 can determine which direction the switching direction means by the screen switching signal is. A switching data storage section, which is stored in plural numbers, is composed of, for example, an EEPROM.

22 is a receiving unit for receiving a screen switching signal and other function selection signals for the viewer to operate by outputting the screen switching key of the key input means 18.

24 determines whether the screen switching signal according to the screen switching key operation of the key input means 18 is inputted to the receiving unit 22 while controlling the operation of the entire apparatus. It is a microcomputer that recognizes which direction should be switched based on the switching data stored in the unit 20 and outputs a screen switching control signal accordingly.

Reference numeral 26 denotes screen switching means for switching the current screen displayed on the CRT in a predetermined direction according to the screen switching control signal output from the microcomputer 24.

Here, as an example of the screen switching means 26, a terminal A is formed at one end of the vertical deflection coil of the deflection yoke 12, and the other end of the vertical deflection coil as shown in FIG. B) is formed, and terminals C and D are formed at predetermined positions of the input and output terminals of the vertical deflection portion 10 while maintaining a predetermined distance from the terminals A and B. Switching unit (S1) for switching the driving so that the screen on the CRT is switched 180 degrees or not in the vertical direction in accordance with the connection form of, D); A terminal E is formed at one end of the horizontal deflection coil of the deflection yoke 12, and a terminal F is formed at the other end of the life deflection coil, and is horizontally maintained with a predetermined distance from the terminals E and F. The terminal G is formed at the input end of the position adjusting part 16 and the terminal H is formed at the output end of the horizontal deflection part 14, and according to the connection form of the terminals E, F, G, H, CRT The upper screen is composed of a second switching unit S2 which is switched to be switched or not switched by about 180 degrees in the horizontal direction.

In addition, when the terminal A and the terminal C are connected in the first switching unit S1 and the terminal B and the terminal D are connected, the screen switching in the vertical direction does not occur, whereas the terminal ( When A) and terminal D are connected, and terminal B and terminal C are connected, screen switching of about 180 ° occurs in the vertical direction.

In addition, when the terminal E and the terminal G are connected in the second switching unit S2 and the terminal F and the terminal H are connected, the screen switching in the horizontal direction does not occur, whereas the terminal ( When E) and terminal H are connected and terminal F and terminal G are connected, screen switching of about 180 ° occurs in the horizontal direction.

Referring to the screen switching operation in a television with a screen switching function according to an embodiment of the present invention configured as described above are as follows.

In FIG. 3, the initial screen state currently being displayed on the CRT (i.e., terminal A of the first switching unit S1 shown in FIG. 4 is terminal C and terminal B is terminal). (D) is connected, the terminal E of the second switching unit (S2) is a normal number as shown in Fig. 5 (a) as the terminal (G) and the terminal (F) is connected to the terminal (H) If you want to switch the screen state displayed on the CRT 180 degrees horizontally, the viewer operates the screen switching key on the key input means 18 to output the screen switching signal accordingly. Subsequently, the microcomputer 24 determines the content of the screen switching signal by the toggle method received by the receiver 22 based on the switching data for the switching direction recognition stored in the switching data memory 20.

As a result of the determination, the microcomputer 24 determines that the content of the screen switching signal is a signal to switch the initial screen state 180 degrees in the horizontal direction, and outputs a screen switching control preference (eg, '01') accordingly. do. Accordingly, the first switching unit S1 constituting the screen switching means 26 maintains the connection state at the initial screen, and the terminal E of the second switching unit S2 is the terminal H and the terminal. (F) is connected to the terminal G. Accordingly, when a current flows through the deflection yoke 12, the screen state is turned 180 ° in the horizontal direction as shown in FIG.

When the viewer outputs a screen switching signal corresponding to 180 ° of switching the initial screen in the vertical direction by using the key input means 18, the microcomputer 24 switches the data storage unit 20. ) Determines the contents of the screen switching signal according to the toggle method received by the receiving unit 22 based on the switching data for the switching direction recognition, and the microcomputer 24 determines the contents of the screen switching signal. It is determined that the initial screen state is a signal to switch 180 ° in the vertical direction, and a screen switching control signal (eg, '10') is outputted accordingly. Accordingly, the terminal A of the first switching unit S1 constituting the screen switching means 26 is connected to the terminal D and the terminal B is connected to the terminal C, while the second switching unit is connected. (S2) maintains the connection state at the initial screen. Accordingly, when a current flows through the deflection yoke 12, the screen state is turned 180 degrees in the vertical direction as shown in FIG.

When the viewer outputs a screen switching signal corresponding to 180 ° of switching the initial screen in the vertical direction and the horizontal direction using the key input means 18, the microcomputer 24 switches the switching data. On the basis of the switching data for switching direction recognition stored in the storage unit 20, the contents of the screen switching signal by the toggle method received by the receiving unit 22 are determined. As a result of the determination, the microcomputer 24 determines the screen. It is determined that the content of the switching signal is a signal for switching the initial screen state 180 degrees in the vertical direction and the horizontal direction, respectively, and outputs a screen switching control signal (eg, '11') accordingly. Accordingly, the terminal A of the first switching unit S1 is connected to the terminal D, the terminal B is connected to the terminal C, and the terminal E of the second switching unit S2 is The terminal H and the terminal F are connected to the terminal G. FIG. As a result, when the current flows through the deflection yoke 12, as shown in FIG. 5 (d), the screen state is turned 180 degrees in the vertical and horizontal directions with respect to the initial screen.

In addition, this invention is not limited only to the said Example, It can implement by a deformation | transformation and correction within the range which does not deviate from the summary of this invention. For example, in the embodiment of the present invention, the present invention is limited to a television, but may be applied to an A / V device such as a laser disc player using a television receiver as a dedicated monitor.

According to the present invention as described above, when the viewer operates the screen switching key on the key input means to switch the screen displayed on the CRT in a predetermined direction, the screen is switched in a predetermined direction and displayed, Even in the case of repair work, it is possible not only to perform repair work while viewing the right screen but also to produce various screens when constructing an interior.

Claims (3)

In a television equipped with image processing means for extracting an image signal from a broadcast signal tuned by a tuner and then processing the image and displaying the image on a CRT, the screen may be switched in a direction desired by the viewer with a predetermined screen switching key. A switching data storage unit storing a plurality of key input means 18 for outputting a predetermined screen switching signal and a plurality of switching data for switching direction recognition corresponding to the screen switching signal outputted from the key input means 18; 20) when the screen switching signal is input from the key input means 18, the microcomputer 24 for judging based on the switching data of the switching data memory unit 20 and outputting the screen switching control signal in the corresponding switching direction; And screen switching means 26 for switching and switching the screen displayed on the CRT in a predetermined direction according to the screen switching control signal from the microcomputer 24. TV with a screen switching function, characterized in that the configuration is further provided. 2. The screen switching means (26) according to claim 1, wherein the screen switching means (26) is installed at the end of the vertical deflection coil of the deflection yoke (12) and switched according to the screen switching control signal of the microcomputer (24) to perform the screen switching operation in the vertical direction. The first switching unit (S1) to change the current flow in the vertical deflection coil as possible, and is installed in the horizontal deflection coil end of the deflection yoke 12 is switched in accordance with the screen switching control signal of the microcomputer 24 to the horizontal direction And a second switching unit (S2) for changing a current flow in the horizontal deflection coil so as to perform a screen switching operation. 3. The screen switching means of claim 2, wherein the screen can be switched by the screen switching operation of the screen switching means 26, characterized in that configured to switch in the horizontal and / or vertical direction by 180 ° in the screen switching TV with screen switching function.