KR0123834B1 - Choicing stress circuit of rgb signal - Google Patents

Abstract

The circuit for adjusting RGB signal selectively by controlling voltage of emitters of a number of drive Tr. includes a key input circuit(30) inputting R,G,and B signal selectively to control respective drive state, a RGB controller(40) generating PWM control signal for adjusting respective drive state of RGB, and an integration circuit(50) providing integrated PWM signal to control respective drive intensity of RGB signal driven by a number of Trs.(Q1-3).

Description

Selective emphasis circuit of RGB signal

1 is a diagram showing the configuration of main parts of a selective emphasis circuit of RGB signals according to the present invention;

2 is a diagram showing a remote control transmitter used in the present invention.

3 is a drive circuit of the current general RGB signal.

* Explanation of symbols for main parts of the drawings

10: image processing unit 20: CRT unit

30: key input unit 40: RGB control unit

50: Integral circuit part Q1 ~ Q3: Drive transistor

R1 ~ R3, R11 ~ R13: Resistance

The present invention relates to a selective enhancement circuit of RGB signals, and more particularly, to provide an integration means and an RGB control means for the RGB signal which can selectively adjust the color density of each RGB signal output from each RGB output port of the image processor. It relates to a selective emphasis circuit.

FIG. 3 shows a drive circuit of the current general RGB signal, and the circuit of the same drawing shows a plurality of base terminals connected to respective output ports (ie, R port, G port, and B port) of the image processing unit 10. First resistor groups R1, R2, R3, and second resistor groups R11, R12, which are connected in parallel to each of the transistors Q1, Q2, Q3 and the collector terminals of the plurality of transistors Q1, Q2, Q3, respectively. R13).

The operation of the circuit as described above is performed by the image processing unit 10, and then the RGB signals output from the respective output ports (R port, G port, and B port) are output to the respective output ports (R port, G port). The CRT section 20 is shown after being applied to each base terminal of the RGB signal drive transistors Q1 to Q3 having their base terminals connected to the port and port B, and driven by the transistors Q1 to Q3. Is applied to an unconnected cathode terminal to be displayed as an image on the screen.

By the way, in the above circuit, the color ratio of the RGB signal is normal (e.g., RGB concentration ratio) by a variable resistor (not shown) connected to the emitter terminals of the transistors Q1 to Q3 driving the respective RGB signals at the time of product shipment. 24: 30: 32), so that the user cannot adjust it artificially.

Accordingly, the present invention has been made in view of the above circumstances, and further provides RGB control means and integration means for adjusting the drive ratio of each of the RGB signals output from the image processing means to be applied to each emitter terminal of the plurality of drive transistors. It is an object of the present invention to provide a selective emphasis circuit for RGB signals, which is capable of selectively adjusting RGB signals from the image processing means by controlling potentials.

According to the selective enhancement circuit of the RGB signal of the present invention for achieving the above object, each base terminal is connected to each RGB output port of the image processing unit, and video power is supplied to each of the collector terminals via a resistor. And a CRT drive circuit having a plurality of drive transistors respectively supplying an RGB signal driven to the CRT side through a resistor connected between each collector terminal and a resistor terminal, wherein the drive for the RGB signal from the RGB output port is performed. A key input unit which performs key input for individually adjusting the states for the R signal, the G signal, and the B signal, and a drive for the drive transistor selected by the key input of the key input unit among the plurality of drive transistors. Generates PWM control signal to adjust the status from the RGB output port An RGB control unit that performs individual drive adjustment control for the R signal, the G signal, or the B signal, and its RGB terminal is connected between the emitter terminal and the resistance terminal of the plurality of drive transistors, and the PWM control signal from the RGB control unit And an integrated circuit unit for outputting an electric potential level signal obtained by integrating the integrated circuit so that the drive degree of the RGB signals driven by the plurality of drive transistors is individually adjusted.

In addition, the key input unit is further equipped with an R signal adjusting button, a G signal adjusting button, a B signal adjusting button and a normal button.

Therefore, according to the present invention configured as described above, when the user presses any one of the RGB up / down buttons of the key input unit 30 to adjust the chromaticity ratio of the RGB signal, the RGB control unit according to the key input signal corresponding to the pressed key A predetermined PWM control signal is outputted from the 40, and the outputted PWM control signal is integrated to the DC level by the integrating circuit section 50, and among the plurality of drive transistors Q1, Q2, Q3 at a predetermined potential level. The RGB signal output from the image processing unit 10 by being applied to the emitter terminal of the selected drive transistor is displayed on the screen of the CRT unit 20 by adjusting the drive degree according to the applied all positions, so that the user It can be confirmed visually.

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

FIG. 1 shows the configuration of the main part of the selective enhancement circuit of the RGB signal according to the present invention. In FIG. 3, components corresponding to those of FIG. 3 are denoted by the same reference numerals, and detailed description thereof will be omitted.

The circuit of FIG. 1 includes a plurality of drive transistors Q1, each having its base terminal connected to an image processing unit 10 and each output port (i.e., R port, G port, and B port) of the image processing unit 10. Q2, Q3) and the first resistor group R1, R2, R3 and the second resistor group R11, R12, R13 and the respective resistor terminals connected in parallel to the respective collector terminals of the plurality of drive transistors Q1, Q2, and Q3, respectively. And a CRT drive circuit having third resistor groups R21, R22, and R23 connected between the emitter terminal and the ground terminal.

In addition, according to the circuit of the present invention shown in the figure, the RGB control unit 40 for outputting different predetermined PWM control signals in accordance with the key input signal from the key input unit 30 to the respective RGB control signal output ports; Emitters of the plurality of drive transistors Q1, Q2, and Q3 are integrated through the RGB terminals by integrating the PWM signals output from the respective output ports (R port, G port, and B port) of the RGB controller 40. An integrating circuit section 50 for outputting a predetermined DC potential level signal between the terminal and the third resistor groups R21, R22, and R23, and a key input section 30 used as an adjusting means of the RGB signal.

Here, R terminal of the plurality of output terminals of the integrated circuit unit 50 is connected to the emitter terminal of the first drive transistor (Q1), G terminal is connected to the emitter terminal of the second drive transistor (Q2), Terminal B is connected to the emitter terminal of the third drive transistor Q3.

In addition, the key input 30 is further equipped with an R signal control button, G signal control button, B signal control button and a normal button.

Next, the operation of the present invention configured as described above will be described in more detail with reference to FIGS. 1 and 2.

First, RGB signals outputted from the image processor 10 shown in FIG. 1 through a predetermined image processing process are output to respective output ports (R port, G port, and B port) of the image processor 10. Each base terminal is driven by a plurality of drive transistors Q1, Q2, and Q3 connected to each other, and is output on the screen of the CRT unit 20. In this case, the driving degree is normally NORMAL (ie, RGB). The chromaticity ratio of the signal is set by a variable resistor connected to each emitter terminal of the drive transistors Q1, Q2 and Q3, which are not shown in the state of 24:30:32.

Subsequently, when the viewer presses the R signal control button of the remote control transmitter shown in FIG. 2 in the up direction, the RGB control unit 40 recognizes the key input signal of the remote control transmitter in which the RGB controller 40 becomes the key input unit 30 in proportion to the pressed time. And outputs a predetermined PWM control signal corresponding to the key input signal from the R control signal output point, and the PWM control signal is applied to the integrated circuit section 50 to form the predetermined pulse. The drive is driven by the first drive transistor Q1 so that the chromaticity of the R signal output from the image processor 10 is increased by integrating the signal to a DC potential level and applying the signal to the emitter terminal of the first drive transistor Q1. After that, the R signal is highlighted and displayed on the screen of the CRT unit 20.

Herein, the chromaticity levels of the RGB signals are each composed of 0 to 64 steps.

Similarly, even if the viewer presses the G signal adjusting button or the B signal adjusting button of the remote control transmitter shown in FIG. 2 in the up direction, the same operation as that of the R signal is performed.

On the other hand, when the viewer presses the R signal control button of the remote control transmitter shown in FIG. 2 in the down direction, the RGB controller 40 recognizes the key input signal of the remote control transmitter which becomes the key input unit 30 in proportion to the time pressed. And outputs a predetermined PWM control signal corresponding to the key input signal from the R control signal output point. The PWM control signal is applied to the integrated circuit section 50 to form a predetermined pulse. Is driven by the first drive transistor Q1 so that the chromaticity of the R signal output from the image processor 10 is increased by integrating the DC potential level and applying the same to the emitter terminal of the first drive transistor Q1. Thereafter, the color of the R signal is reduced and displayed on the screen of the CRT unit 20.

Similarly, even if the viewer presses the G signal control button or the B signal control button of the remote control transmitter shown in FIG. 2 in the down direction, the same operation as that of the R signal is performed.

Accordingly, when the up button of the remote control transmitter is pressed, the DC potential level output from the integrating circuit section 50 to the emitter terminals of the drive transistors Q1, Q2, and Q3 is controlled to be low, thereby driving the drive for any one of the RGB signals. When the down button of the remote control transmitter is pressed, the DC potential level output from the integrating circuit unit 50 to the emitter terminals of the drive transistors Q1, Q2, and Q3 is controlled to be high, so that any one of the RGB signals is pressed. Drive will become smaller.

Then, when the user presses the normal button of the remote control transmitter in order to watch in the initial normal state, the RGB control unit 40 receives the corresponding key input signal corresponding to the respective output port R. From the port, G port, and B port, a predetermined PWM control signal corresponding to the initial normal setting state (chroma ratio of RGB signal: 24: 30: 32) is outputted, and accordingly, the respective drive transistors Q1, The emitter terminals of Q2 and Q3 are subjected to the corresponding DC potential level integrated by the integrating circuit section 50, and the CRT after the RGB signal from the image processing section 10 is driven in the first normal state and then driven. To be displayed on the screen of the unit 20.

Therefore, the viewer can selectively adjust the RGB signal from the image processing means by controlling the potential applied to each emitter terminal of the plurality of drive transistors.

Claims (2)

While each base terminal is brought into contact with each RGB output port of the image processor 10, video power is supplied to each of the collector terminals via resistors R11, R12, and R13, and each collector terminal and resistor ( CRT drive having a plurality of drive transistors (Q1, Q2, Q3) for supplying RGB signals driven to the CRT 20 side via the resistors R1, R2, R3 connected between the R11, R12, and R13 stages. A circuit, comprising: a key input section 30 for performing key input for individually adjusting drive states for RGB signals from the RGB output port for the R signal, the G signal, and the B signal, respectively; Generates a PWM control signal for adjusting the drive state of the drive transistor selected by the key input of the key input unit 30 among the four drive transistors Q1, Q2, and Q3, and outputs an R signal or a G signal from the RGB output port. Or B An RGB control unit 40 for performing individual drive adjustment control for the call and its RGB terminal are connected between the emitter terminals of the plurality of drive transistors Q1, Q2, and Q3 and the resistors R21, R22, and R23. And outputting a potential level signal integrating the PWM control signal from the RGB controller 40 so that the drive accuracy of the RGB signals driven by the plurality of drive transistors Q1, Q2, and Q3 are individually adjusted. Selective emphasis circuit of the RGB signal, characterized in that it further comprises an integration circuit section (50). 2. The key input unit (30) according to claim 1, wherein the key input unit (30) includes an R signal control button and a G signal control button which are responsible for key input for each individual adjustment of a drive state for the plurality of drive transistors Q1, Q2, and Q3. And a B signal saving button, and a normal button for performing key input for integrally setting the RGB signal to a normal state.