KR100190648B1 - Measurement apparatus for screen of braun tube with color signal switch - Google Patents

Abstract

An apparatus for adjusting a CRT screen, comprising: a camera for capturing a CRT screen and outputting a video signal, an analog / digital converter for receiving a video signal from the camera and converting the video signal into digital data; and the analog / digital converter A memory unit for receiving and storing digital data from the memory unit; a controller for reading and processing digital data from the memory unit; and outputting a screen adjustment control signal according to the processing result; and a screen adjustment control signal output from the controller. A deflection device for adjusting the CRT, and a color signal switching unit for automatically outputting a switching signal for each color signal by using a vertical deflection synchronous signal and a camera gate signal generated by the deflection device; Camera's Synchronized to Sync Signal By processing to save the image data of each color signal in each color signal to be automatically switched by using the gate signal, the faster the speed of the picture tube, can be measured precisely.

Description

CRT screen measuring device with color signal switching device

1 is a block diagram showing the configuration of the CRT screen automatic measuring device according to the present invention.

2 is a block diagram showing the configuration of the color signal switching unit according to the present invention.

3 is a timing chart of the green signal switching unit.

4 is a timing chart of a blue signal switching unit.

5 is a timing chart of a red signal switching unit.

6 is a timing chart of a signal generation unit during photographing.

7 is a timing chart of a storage signal generator.

8 is a timing chart of a photographing end signal generator.

* Explanation of symbols for main parts of the drawings

10: control unit 20: deflection device

40: camera 50: analog / digital conversion unit

60: memory unit 70: color signal switching unit

The present invention relates to a CRT screen measuring device having a color signal switching device. In particular, a CRT screen measuring device having a color signal switching device for supplying screen data obtained through a screen measuring camera to a deflection device of the CRT according to RGB signals. It is about.

The CRT screen inspection process is a process of inspecting and adjusting the color purity and color concentration of the CRT screen. In the conventional inspection process, because the human eye uses the CRT screen for a long time, it is difficult to secure the consistency of the inspection due to the change of the coordinator's fatigue and other psychological states, thereby causing a change in product quality. In addition, there is a problem in that the adjusted CRT shows a different quality distribution for each adjuster due to the difference in the judges' criterion.

Therefore, in order to overcome these problems, the automatic screen state measurement system, which can effectively replace the visual ability of the coordinator, takes images of the screen using a plurality of cameras, processes the images, and makes measurements. According to the measurement result, the deflector is controlled to adjust the CRT screen.

Since the camera used in the automatic screen state measurement system is a black and white camera, in order to obtain data of one screen, three measurements must be performed while turning on each signal of red, green, and blue one by one.

Therefore, a camera switching device is needed to switch the data of the screen output from the black and white cameras used in the automatic screen state measurement system to the deflection device by switching each signal of red, green, and blue signals.

The present invention is to solve the above problems, an object of the present invention is to switch the data of the screen output from the monochrome camera used in the automatic screen state measurement system for each signal of red, green, blue to supply to the deflection device It is to provide a CRT screen measuring device having a color signal switching device.

Another object of the present invention is to provide a CRT screen measuring apparatus having a color signal switching device which is automatically switched to screen data for each color signal by using a vertical deflection synchronization signal and a camera gate signal supplied from a deflection device. It is.

In order to achieve the above object, the device according to the present invention comprises a camera for capturing a picture of a CRT screen and outputting an image signal, an analog / digital converter for receiving an image signal from the camera and converting the image signal into digital data; A memory unit for receiving and storing digital data from the digital converter, a controller for reading and processing digital data from the memory unit, and outputting a screen adjustment control signal according to the processing result, and an adjustment control signal output from the controller. And a color signal switching unit for automatically outputting a switching signal for each color signal using a vertical deflection synchronous signal and a camera gate signal generated by the deflection apparatus.

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

1 is a block diagram showing the configuration of the CRT automatic measuring device according to the present invention.

The CRT display automatic measuring device is a camera 40 for taking a picture of the CRT 30 and outputting the video signal, and an analog / digital conversion part for converting and outputting the video signal output from the camera 40 into digital data. 50, a memory unit 60 for receiving and storing digital data from the analog / digital conversion unit 50, and reading and processing digital data from the memory unit 60 and adjusting the screen according to the processing result. A control unit 10 for outputting a control signal, a deflection device 20 for receiving the screen adjustment control signal output from the control unit 10 to adjust the CRT, and a vertical deflection synchronizer generated by the deflection device 20. The color signal switching unit 70 automatically outputs a conversion signal for each color signal using the signal and the camera gate signal.

Initially, the control unit 10 outputs a control signal to the deflector 20 to turn on the red beam. The shift gate signal SH, which is applied to the measurement start command color signal switching unit 70 and synchronized with the vertical synchronization signal of the deflection device 20, is applied to the color signal switching unit 70. The red beam image signal of the CRT screen captured by the camera 40 during one period of the shift gate signal SH is input to the analog / digital converter 50, converted into digital data, and stored in the memory unit. At the falling edge of the next shift gate signal, the green switching signal SWG is generated and applied to the deflection device 20. The deflection device 20 receiving the green switching signal SWG turns on the green beam in the CRT. At this time, the camera 40 takes a picture of the CRT screen and is stored in the memory unit 60 through the above process. During the next period of the shift gate signal SH, the blue switching signal SWB is generated and stored in the same memory unit 60.

2 is a block diagram showing the configuration of the color signal switching unit according to the present invention.

The color signal switching unit 70 according to the present invention receives an address signal BU and BL, a write / read control signal W / R, and an operation command signal output from the controller 10, and outputs an operation execution signal. The decoding unit 700 receives the operation execution signal from the address decoding unit 700, receives the shift gate signal SH and the data bus D0 signal output from the control unit 10, and receives a green switching signal. A green signal generator 710 for outputting and a blue signal generator for receiving a green switch signal output from the green signal generator 710 and performing a logical operation with a shift gate signal SH to output a blue switch signal ( 720, a photographing signal generator 750 for receiving a blue switching signal output from the blue signal generator 720 and performing a logical operation with a shift gate signal SH to output a photographing signal; From the signal generator 750 A measurement completion signal generator 740 which receives a signal during recording and outputs a measurement completion signal by performing a logical operation on the shift gate signal SH and the reset signal, and the green switching signal, the blue switching signal, and the camera switching signal. To a storage signal generator 730 for outputting a camera photographing signal by a logical operation, and a red switching signal generator 760 for outputting a red switching signal by performing a logical operation on the green switching signal, the blue switching signal, and the shift gate signal. It is composed.

Hereinafter, the operation and effects of the present invention will be described.

When the measurement start command is initially input to the control unit 10, the control unit 10 transmits the shift gate signal SH synchronized with the vertical deflection synchronizing signal VSYNC output from the deflection device 20 to the color signal switching unit 70. Type in The shift gate signal SH is input to the green signal switching unit 710, inverted at the NOT gate 714, and clocked to the flip-flop 711.

Meanwhile, the address signals BU and BL, the write / read control signal W / R, and the operation command signal are input to the address decoding unit 700, so that the address signals BU and BL and the write / read control signal W / R is subjected to a Noah operation at the NOR gate 701 and then input to the AND gate 703. The operation command signal CR is inverted at the nat gate 702 and input to the AND gate 703 to perform an AND operation with the output of the NOR gate 701.

The output of the AND gate 703 of the address decoding unit 700 is input to the flip-flop 713 of the green signal switching unit 710 by clicking, and the lowest data D0 of the data bus is input of the flip-flop 713. It is input to the terminal D and its output is input to the input terminal D of the flip-flop 711.

3 is a timing chart of the green signal switching unit.

When the output signal G1 of the flip-flop 713 becomes "1" and the output signal G2 of the nat gate 714 is rising edge, the output signal G4 of the flip-flop 711 becomes "1". It becomes The output signal G4 of the flip-flop 711 is output as the green switching signal SWG and is input to the input terminal D of the flip-flop 712. At the rising edge of the third shift gate signal SH, the output signal G5 of the flip-flop 712 becomes " 1 ", and the output signal G6 of the inverter 715 becomes " 0 " Is entered. The AND gate 716 receiving the input of "0" outputs a signal of "0" to the clear terminal of the flip-flop 711, and the output of the flip-flop 711 becomes "0".

4 is a timing chart of the blue signal switching unit.

The green switching signal SWG output from the green signal switching unit 710 is input as a clock signal to the flip-flop 721 of the blue signal switching unit 720 to generate the blue switching signal SWB.

In the flip-flop 721, the data input terminal D is connected to the Vcc power supply so that the output signal B1 becomes "1" at the rising edge of the blue switching signal SWB. On the rising edge of the next shift gate signal SH, the blue switching signal SWB becomes " 0 " for the reasons described above, but the output signal of the flip-flop 721 is kept at " 1 ".

The output signal B2 of the flip-flop 721 is simultaneously input to the input terminal D of the flip-flops 722 and 723. The flip-flop 723 receives the shift gate signal SH inverted by the inverter 724 as a clock signal while the " 1 " is still applied to the input terminal D, and outputs the output signal B4 at its rising edge. ) Is kept at "1". The output signal "1" is inverted by the inverter 725 and input to the clear terminal of the flip-flop 721, so that the output signal B1 of the flip-flop 721 becomes "0".

On the other hand, the flip-flop 722 receives the second shift gate signal SH as a clock signal, and the output signal B4 becomes "1" at its falling edge. This is because the output signal B1 of the flip-flop 721 is still maintained at "1" at the falling edge of the second shift gate signal SH.

The output signal B4 of the flip-flop 722 and the shift gate signal SH inverted by the inverter 726 are ANDed at the AND gate 727 to be output as a blue switching signal. The blue switching signal SWB is input to the switching signal generator 750 together with the green switching signal SWG to generate the red switching signal SWR.

5 is a timing chart of a red signal switching unit.

When the blue switching signal SWB and the green switching signal SWG are both " 0 " together, the two signals are subjected to NOR operation at the NOR gate 761 to output "1", and the output signal of the NOR gate 761 is output. The shift gate signal SH inverted by the R1 and the inverter 762 is ANDed at the AND gate 763, and is output as the red switching signal SWR.

When the blue switching signal SWB and the green switching signal SWG are both "0" so that the output signal R1 of the NOR gate 761 is "1", but the inverted shift gate signal R2 is "0", The red switching signal SWR becomes " 0 " (t51 section in Fig. 5). When the inverted shift gate signal 2 is "1", since the green switching signal is "1" and the blue switching signal SWB is "0", the output signal of the NOR gate 761 becomes "0" and the red color is red. The switching signal SWR holds " 0 " (t52 section in Fig. 5).

When the inverted shift gate signal becomes "0" again and the green switching signal SWG "0" and the blue switching signal SWB "0", the red switching signal SWR remains "0" (Fig. 5). section t53).

When the inverted shift gate signal SH becomes "1" again and the green switching signal SWG "0" and the blue switching signal SWB "1", the red switching signal SWR remains "0" ( Section t54 of FIG. 5).

When the green switching signal SWG is "0" and the blue switching signal SWB is "0", the inverted shift gate signal becomes "0" again, and the red switching signal SWR remains "0" (Fig. 5). section t55).

When the inverted shift gate signal becomes "1" again, the green switching signal SWG "0" and the blue switching signal SWB "0", the red switching signal SWR becomes "1" and the red switching signal SWR. ) Is output (t56 section in Fig. 5).

Meanwhile, the blue switching signal SWB is input to the signal generation unit 750 during shooting to generate a signal TT during shooting. 6 shows a timing chart of the signal generator during imaging.

The blue switching signal SWB is input as the claw signal of the flip-flop 751, and since the input terminal D of the flip-flop 751 is connected to the Vcc power supply, the blue switching signal SWB is flipped at the rising edge of the blue switching signal SWB. The output signal T1 of the flop 751 becomes "1".

The output signal T1 of the flip-flop 751 is simultaneously input to the flip-flop 752 and the input terminal D of the flip-flop 753. The flip-flop 752 receives a shift gate signal SH as a clock signal, and the flip-flop 753 receives an inverted shift gate signal SH as a clock signal. After the blue switching signal SWB becomes " 1 ", the output signal of the flip-flop 753 becomes " 1 " and the output of the flip-flop 752 at the rising edge of the inverted shift gate signal SH. The signal T4 becomes "1". The output signal of the flip-flop 753 is inverted by the inverter 755 and input to the clear terminal of the flip-flop 751 so that the output signal T1 of the flip-flop 751 becomes "0".

After the blue switching signal SWB becomes " 0 " again, the shift gate signal SH inverted by the inverter 756 and the output signal T4 of the flip-flop 752 are ANDed in the subsequent shift gate signal SH. It is input to the gate 757 and is ANDed.

The photographing signal output from the AND gate 757 is input to the storage signal generator 730 and the measurement completion signal generator 740.

7 shows a timing chart of the storage signal generator.

The green switching signal SWG, the blue switching signal SWB, and the photographing signal TT are orally calculated at the OR gate 731 to generate a storage signal VENA, and output the stored signal VENA to the controller 10. When the red switching signal SWR and the blue switching signal SWB are "0", and the green switching signal SWG is "1", the storage signal VENA is generated at the falling edge of the shift gate signal SH. An image of the CRT screen captured by the camera 40 is stored in the memory unit 60. The blue switching signal SWB and the red switching signal SWR are stored in the memory unit 60 in the same manner as described above.

8 shows a timing chart of the measurement completion signal generator.

The photographing signal TT is inverted by the inverter 742 and input as a clock signal of the flip-flop 741. Since the input terminal D of the flip-flop 741 is connected to the Vcc power supply, the output hinge Q2 of the flip-flop 741 becomes "1" at the rising edge of the inverted imaging signal Q1.

The output signal Q2 and the shift gate signal SH of the flip-flop 741 are AND-operated at the AND gate 743, and the output signal Q3 is inverted at the inverter 744 to be reset with the reset signal RESET. The AND operation is performed together with the AND gate 745 to output the measurement completion signal TTT. Since the reset signal RESET is normally " 1 ", the measurement completion signal TTT is generated whenever the color switching signal is generated.

As described above, according to the present invention, each color signal is automatically switched by using a camera and a shift gate signal synchronized to a vertical deflection synchronizing signal supplied to the CRT in a deflection apparatus, thereby storing and processing image data of each color signal. The measuring speed of is faster and can be measured accurately.

Claims (3)

A CRT screen measuring apparatus comprising: a camera for photographing a CRT screen and outputting an image signal, an analog / digital converter for receiving an image signal from the camera and converting the image signal into digital data, and digital data from the analog / digital converter A memory unit for receiving and storing a digital signal, a controller for reading and processing digital data from the memory unit, and outputting a screen adjustment control signal according to the processing result, and receiving the screen adjustment control signal outputted from the controller. CRT screen having a color signal switching device including a deflection device for adjusting and a color signal switching unit for automatically outputting a switching signal for each color signal by using a vertical deflection synchronous signal and a camera gate signal generated by the deflection device. Measuring device. The display device of claim 1, wherein the color signal switching unit receives an address signal, a write / read control signal, and an operation command signal output from the control unit, and outputs an operation execution signal, and outputs an operation execution signal from the address decoding unit. A green signal generator for receiving a shift gate signal and a data bus signal output from the controller and outputting a green switch signal, and a green gate signal output from the green signal generator for receiving a shift gate signal and logic; A blue signal generating unit for calculating and outputting a blue switching signal, a shooting signal generating unit for receiving a blue switching signal output from the blue signal generating unit and performing a logical operation with a shift gate signal to output a shooting signal; Shift gate signal by receiving the signal during shooting output from the signal generator And a measurement completion signal generator for performing a logic operation with a reset signal and outputting a measurement completion signal, a storage signal generator for outputting a storage signal by performing a logical operation on the green switching signal, the blue switching signal, and the camera switching signal, and the green And a red switching signal generator for logically operating the switching signal, the blue switching signal, and the shift gate signal to output a red switching signal. The CRT screen measuring apparatus according to claim 1 or 2, wherein the shift gate signal is synchronized with a vertical synchronous signal output from the deflection apparatus.