KR100260706B1 - Apparatus removing akb line of monitor received broadcasting - Google Patents

Abstract

PURPOSE: An apparatus for eliminating an automatic kinetic bias(AKB) line is to prevent lines of red(R), green(G) and blue(B) of an AKB signal from being produced by checking an output timing of the AKB signal. CONSTITUTION: A controller(20) is connected to an output terminal of a key input(10) to control an interrupter(30), an AKB signal generator(40), and a memory(50). An output terminal of the AKB signal generator is connected to a comparator(60). The comparator compares the AKB signal with a signal feedback from a CRT amp(80), and outputs a voltage value to a CRT driving unit(70) and the memory. An input terminal of the CRT driving unit is connected to the comparator and the memory, and an output thereof is connected to the CRT amp and a CRT. The CRT driving unit is driven by a constant voltage value output from the memory to output an RGB signal for outputting a picture wanted by a user to a CRT(90).

Description

AM line removal device of broadcasting reception monitor

The present invention relates to an apparatus for automatically adjusting the white balance through the AKB (Automatic Kinetic Bias) signal, which is a signal for preventing the white balance of the TV receiver from being distorted, and more particularly, immediately before the AKB signal is blocked. The AKB line removal device of a broadcast reception monitor which removes the AKB line appearing on the screen due to continuous AKB signal generation during 16: 9 screen mode conversion by adjusting the white balance with the voltage value obtained by outputting the AKB signal.

In general, white balance refers to reproducing an achromatic image in an additive mixture of red (R), green (G), and blue (B) colors. When three electron gun receiver tubes are used, the luminous efficiency of the phosphors is different, so the operation of the R, G and B electron guns or the magnitude of the video signal to be applied are adjusted. If this adjustment is incomplete, the color image will not be reproduced beautifully. Therefore, the key factor in determining image quality in the market is accurate white balance value. The white balance described above is adjusted to the characteristics of the original factory production line, but depends on the characteristics of the CRT (Cathod Ray Tube) and the circuit of the RGB driving amplifier as the user uses the TV. At this time, in order to adjust the misaligned white balance, the AKB signal is continuously output to the signal generated from the IC of the RGB matrix in the vertical blanking period, and the voltage fed back from the driving amplifier is detected through the normal process, and then compared with the AKB signal. The white balance has been adjusted automatically.

However, in the above characteristics adjustment, if the AKB signal is continuously output to adjust the white balance, when switching from 4: 3 screen mode to 16: 9 screen mode, the AKB signal is displayed on the upper part of the screen. There was a problem that occurred.

Accordingly, an object of the present invention is to check the output timing of the AKB signal, which is a signal for adjusting the white balance, to prevent the RGB three lines of the AKB signal from appearing on the monitor. A line removal device is provided.

1 is a block diagram illustrating a structure of an apparatus according to an embodiment of the present invention.

※ Explanation of code for main part of drawing

10: key input unit 20: control unit

30: interrupt unit 40: AKB signal generating unit

50: memory 60: comparator

70: CRT driving unit 80: CRT amplifier

90: CRT

The apparatus according to the present invention for achieving the above object is to control to suppress the AKB signal by controlling the interruption unit in accordance with the key input, and a key input unit for inputting the switching key and the switching time setting key to the 16: 9 screen mode A control unit, an interrupt unit for outputting an interrupt signal for suppressing the generation of the AKB signal to the AKB signal generation unit during the switching time set according to the control signal of the control unit, a comparator for comparing the AKB signal with the feedback signal, and an AKB signal from the comparator Outputs and continuously stores the AKB signal generator that does not generate the AKB signal for a predetermined time according to the interrupt signal of the interrupt unit, and the voltage value output from the comparator, and immediately before the control signal of the controller, It includes a memory unit for outputting.

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

1 is a block diagram illustrating the structure of an apparatus according to an embodiment of the present invention, and includes a key input unit 10 having a mode switching key and a time setting key. The control unit 20 is connected to an output terminal of the key input unit 10, and the control unit 20 is connected to control the interrupt unit 30, the AKB signal generation unit 40, and the memory unit 50. The comparator 60 is connected to the output terminal of the AKB signal generator 40, and the voltage value obtained by comparing the AKB signal and the signal fed back from the CRT amplifier 80 by the comparator 60 is the CRT driver 70 and the memory unit ( 50). The comparator 60 and the memory unit 50 are connected to the input terminal of the CRT driving unit 70, and the CRT amplifier 80 and the CRT 90 are sequentially connected to the output terminal.

The operation of the AKB line removal apparatus of the broadcast reception monitor according to the embodiment of the present invention configured as described above will be described in detail.

In Fig. 1, in order to adjust the white balance in the 4: 3 picture mode, which is a normal mode, the controller 20 applies a control command to the AKB signal generator 40 to continuously generate an AKB signal. The AKB signal generated from the AKB signal generator 40 is signal-processed together with the image signal in the vertical blanking section in the RGB matrix (not shown) via the comparator 60, and is output together with the RGB signal from the CRT driver 70 by the CRT. The feedback is fed back to the comparator 60 via the amplifier 80. The comparator 60 continuously compares the voltage fed back from the output terminal of the CRT amplifier 80 with the AKB signal output from the AKB signal generator 40 to convert the constant voltage value into the CRT driver 70 and the memory 50. Output The CRT driver 70 is driven by a constant voltage value output from the comparator 60 and outputs an RGB signal to output the screen desired by the user to the CRT 90. On the other hand, the memory unit 50 continuously stores a constant voltage value output from the comparator 60. Since the AKB signal is continuously fed back and compared with the AKB signal, the white balance is automatically adjusted by outputting a constant voltage value. At this time, if the user wants to view the screen in 16: 9 mode, the user inputs the 16: 9 mode switch key and the time setting key through the key input unit 10. The control unit 20 applies an interrupt command for a time set by the interrupt unit 30 according to the key input of the key input unit 10. The interrupter 30 outputs an interrupt signal corresponding to the corresponding time to the AKB signal generator 40 under the control of the controller 20. Therefore, the AKB signal generator 40 stops outputting the AKB signal for a set time. Meanwhile, the controller 20 controls the memory 50 to output the final voltage value output from the comparator 60. The memory unit 50 outputs the voltage value obtained by comparing the final AKB signal generated by the AKB signal generator 40 in the normal 4: 3 mode with the value fed back from the CRT amplifier 80 to the CRT driver 70. do. The CRT driving unit 70 is driven by a constant voltage value output from the memory unit 50 and outputs an RGB signal to output the screen desired by the user to the CRT 90. At this time, the white balance has a constant adjustment value since the AKB signal is not generated during the 16: 9 mode and is driven at the same voltage value.

As described above, the present invention provides an effect of removing three lines of R.G.B according to an AKB signal appearing as the screen is distorted when the broadcast receiver is converted to 16: 9 mode.

Claims (1)

In the automatic white balance adjustment device of the TV receiver, A key input unit for inputting a switch key to a 16: 9 screen mode and a switch time setting key; A control unit controlling the interrupt unit to suppress the AKB signal according to the key input; An interrupt unit for outputting an interrupt signal for suppressing generation of the AKB signal to the AKB signal generator during a switching time set according to the control signal of the controller; A comparator for comparing the AKB signal with a feedback signal; An AKB signal generation unit for outputting an AKB signal from the comparator and not generating the AKB signal for a predetermined time according to the interrupt signal of the interrupt unit; And And a memory unit for continuously storing the voltage value output from the comparator and outputting a voltage value input from the comparator immediately before a control signal of the controller.

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