KR970001926B1 - Dynamic/static checking system of a cathode-ray tube characteristic - Google Patents

Abstract

A characteristic testing apparatus of a braun tube having a dynamic/static characteristic reduces a overtime caused by a manual operation, a judgement error, and a model exchange loss, thereby enhancing a productivity. The apparatus includes: meter/display part(101) for displaying a resultant value after performing a test, and warning a defective state if the defective state is determined; a keyboard(107); a signal generator(109) for generating a video pattern; a video output part(102) for amplifying an output signal of the signal generator(109), and selecting a direct-coupling amplifier; a relay matrix part(103) adjacent to the CDT(106); a vertical deflection V-DEF part(110) for receiving a synchronous signal and a driving signal from the signal generator(109), and providing a vertical deflection power to V-DY(105); a vertical deflection part H-DEF part(111) for receiving a synchronous signal and a driving signal from the signal generator(109), amplifying a horizontal deflection power, and providing it to H-DY(105); EC3 and EC2(112) for providing a focus of the CDT(106) and a screen electrode voltage; CPM controller(113) for adjusting a voltage applied to a CPM(convergence purity magnetic) using a electronic magnetic; EB(114) for providing a high voltage(0V-40kV) to anode terminal of the DCT(106); SMPS(115) for providing a DC power-supply to each terminal of a system; and a power unit(16) for receiving AC input voltage, providing the AC input voltage to each terminal, and being automatically turned off in case of a system overload.

Description

Dynamic / Static CRT Tester

1 is a front view of a dynamic / static CRT tester according to the present invention.

2 is an overall block diagram of a system according to the present invention.

3 is a diagram showing the layout of a keyboard.

4 is a display panel.

5 is an external operation panel diagram according to the interface between the microcomputer and each control unit.

6 is a diagram of a convergence purity magnetic (CPM) controller that is an electronic magnetic adjustment unit.

7 is a diagram of a universal deflection system for supplying deflection yoke and cathode ray tube.

* Explanation of symbols for main parts of the drawings

1: infrared sensor 2: inspection CDT

3: machine control part 4: main drive part

5: Meter selector 6: Universal deflection system

7: power supply 8: display panel

9: high voltage section 101: meter and display section

102: video output unit 103: relay matrix unit

104: CPM 105: DY

106: CDT 107: keyboard

108: microcomputer and interface unit 109: signal generator

110: vertical deflection section V-DEF 111: vertical deflection section H-DEF

112: EC3 and EC2 part 113: CPM controller

114: EB 115: SMPS

116: power supply

[Industrial use]

The present invention relates to a system for comprehensive inspection of CRT, in particular, when mandatory electrical and static characteristics inspection of a CRT (Color Picture Tube) and CDT (Color Disply Tube) production plant is essential, an excessive requirement due to manual work is required. It is a dynamic / static CRT tester that can drastically improve stockout, productivity and workability by reducing work time, judgment error and loss of model exchange in production of various kinds.

[Traditional Technology and Problems]

Conventional CRT inspection system is not only to perform the entire inspection items manually one by one, but also the indication value of the measurement value is indicated by a simple analog measuring instrument, the determination of good or bad, the operator judged by reading the scale. In addition, when the type of CRT produced is different, the DY (Deflection Yoke) used is different, and since the signal and deflection amplification part for driving it are fixed, it is inconvenient to replace the driving deflection part when changing the model.

In addition, if a worker is mistaken while manually inspecting the CRT, the inspection item can be omitted, and if a busy work load is applied, the probability of passing the defect by simply processing without properly complying with the time required for inspection can be accepted. Will be higher.

Therefore, in order to solve such a problem, it is necessary to increase the automatic inspection items, and to display the judgment and indication values with the digital measurement system, and the whole operation needs to be progressed under the control of the microcomputer. In addition, the deflection amplifier must also be equipped with a universal impedance matching system. However, since there are currently no devices capable of satisfying such a requirement, many problems described above are exposed to the CRT test.

[Purpose of invention]

The present invention has been invented in view of the above points, and all of the positive / bad defects are determined by automatically processing all the static characteristic sections of the CRT and turning on the initial start in the unit by dividing into automatic I and automatic II in order of inspection priority. It is automatically handled and the operator only needs to take action by an alarm.The dynamic range must be judged by looking at the screen, so do manual work, but skip the items that can be omitted among the inspection items in the manual mode. It provides a dynamic / static CRT tester that can handle the working time efficiently by separately attaching RIGHT and LEFT switches that control the test switch in the manual unit sequentially. The purpose is.

In addition, the deflection drive unit is divided into units for quick maintenance and installed in a connector board type that can be easily attached and detached.Universal Impedance Matching unit allows for optimum matching of any Deflection Yoke. The purpose is to provide a copper / static characteristics CRT tester equipped with a.

[Configuration of Invention]

According to the present invention for achieving the above object, the result value is automatically memorized and displayed after the test is carried out in a state in which various conditions which are the criteria for determining the test item are preset, and if the defective value is displayed, the displayed predetermined value blinks to give a warning. A meter and a display unit 101 connected to the microcomputer and the interface unit 108 by a data bus while the memorized measurement values are displayed until the next test CDT starts, and exchange information; A keyboard 107 in which a key for manipulating each inspection order and a quantity / failure of the inspection are displayed in red and green on a separate keyboard; A signal generator 109 for generating a video pattern according to system driving; A video output unit 102 that amplifies the micro signal generated by the signal generator 109 into a signal that can be displayed on the DCT 106 and employs a direct coupling amplifier to realize high resolution; A relay matrix unit 103 arranged together with the CDT 106 while being configured together with the video output unit 102 unit board to realize high resolution; A vertical deflection unit V-DEF 110 receiving the synchronization signal and the driving signal applied from the signal generator 109 and supplying the vertical deflection power to the V-DY 105; A vertical deflection unit H-DEF 111 which receives the synchronization signal and the driving signal applied from the signal generator 109 and amplifies the horizontal deflection power and supplies the amplification to the H-DY 105; EC3 and EC2 unit 112 for supplying the focus of the CDT 106 and the voltage for the screen electrode; A CPM controller 113 for adjusting a voltage supplied to a CPM 104 using an electronic magnetic; An EB 114 for supplying a high voltage of 0V to 40KV to the anode terminal of the DCT 106; An SMPS 115 for supplying D.C power to each stage of the system; A.C input voltage is applied to each stage and distributed, and when the overload occurs in the system is characterized in that it comprises a power supply unit 16 that is automatically turned off.

[Action]

According to the present invention configured as described above, the touch I (Touch), the focus electrode leakage current (LIC3), the screen electrode leakage current (LIC2), the cathode heater leakage current (LIHK), the emission warm-up time (TEW) in the automatic I Auto check.

In Auto II, cathode cut-off voltage (EKCO), deviation between cathode cut-off voltage (ΔEKCO), CRT maximum current (MIB), time variation rate (MIB SLUMP) of anode maximum current, heater current (IF), Automatic check of the tube vacuum degree (GR).

In manual mode, the composite properties screen for cathode state (CC), static convergence (STC), independent screen state (SCN) by R (R), G (G) and non (B) electron guns, and two gun operation ), And the stary emission characteristics (SE3, SE2, and SE1) of the composite characteristic screen (White), the focusing range (Defocusing), the focus, the screen, and the control electrode of the three electron gun operations can be inspected and determined.

In addition, there is an under scan switching function for determining linearity, etc. during screen scanning in consideration of CPT and DCT characteristics, and scanning characteristics can be inspected by electronically varying the Depth Convergence Purity Magnetic (CPM). .

In particular, the inspected values and the determination results are automatically input to the microcomputer system so that data management is possible, transmission via computer communication, and management reports through a printer can be made.

EXAMPLE

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

1 is a front view of a dynamic / static CRT tester according to the present invention. In the drawing, reference numeral 1 denotes that an operator's hand approaches a high-pressure part during operation of the apparatus to automatically detect the off state. It is a functioning infrared sensor, 2 is a mechanically maintained inspection CDT, 3 is a mechanical control unit for controlling the exact position of the inspection CDT, 4 is a function to operate all the functions of the inspection and display the status of the result. 5 is the main operation unit, and 5 is a selector for indicating the voltages of Rk, Gk, Bk and Ef in the Universal Deflection System system of Clause 6, and 6 is a signal for driving the CDT. Universal deflection system to universally handle the deflection power to be supplied to the DY, 7 is a power supply for supplying AC input power to each block, 8 is a CDT inspection A display panel that displays preset values according to the test, and 9 is a high voltage section for applying a high voltage to the CDT anode, and 10 amplifies the video signal to be supplied to the CDT. The video amplifier and relay boxes for wiring the correct circuits, 11 are optional boxes that can be installed as additional functionality is required.

2 is a block diagram of the entire system according to the present invention. The meter and the display unit 101 automatically display and display the result value after the test is executed in a state in which various conditions which are the criteria for the inspection item are preset. In particular, in case of failure, the displayed measurement value blinks to give a warning, and the memorized measurement value is displayed until the next inspection CDT starts. In addition, the meter and the display unit 101 are connected to the microcomputer and the interface unit 108 by a data bus to exchange information related to each other. At this time, by completely removing the PLC unit of the conventional method is driven by its own cost-saving microcomputer it is possible to expand the versatility of the speed and interface. And, because the frequency of use is large, it is operated by a computer keyboard, and provides information to the relay matrix unit 103 to be connected to the electron gun electrode of the inspection conditions for each item, and at this time A / D, Perform D / A processing.

The keyboard 107 is displayed in red and green on a separate keyboard to determine the key for manipulating each inspection order and the quantity / failure of the inspection by a double LED.

The signal generator 109 generates a video pattern according to the driving of the system, and includes a built-in mark cross hatchi pattern, which is an essential signal for determining the DY shape, and a raster for grasping the entire electron gun screen. It generates a (Raster) signal and responds by replacing only the card each time it is upgraded with the built-in 15.75kHz mode for television and 31.5kHz mode for monitor.

The video output unit 102 amplifies the small signal generated by the signal generator 109 into a signal that can be displayed on the CDT 106, and employs a direct coupling amplifier to implement high resolution.

The relay matrix unit 103 is configured together with the video output unit 102 unit board in order to realize high resolution, and then disposed close to the CDT 106.

The vertical deflection unit V-DEF 110 receives the synchronization signal and the driving signal applied from the signal generator 109 and supplies the vertical deflection power to the V-DY 105. In this case, when the DY 105 is changed, a matching circuit for deflection according to the intrinsic impedance is embedded.

The vertical deflection unit H-DEF 111 receives the synchronization signal and the driving signal applied from the signal generator 109, amplifies the horizontal deflection power, and supplies the amplified horizontal deflection power to the H-DY 105. In this case, when the DY 105 is changed, a universal impedance matching circuit is built in order to prevent an unbalanced deflection due to the natural impedance.

The EC3 and EC2 units 112 detect the supply of the CDT focus and the screen electrode voltage. The screen voltage EC2 is supplied to the electrodes of the CDT 106 through the relay matrix 103 and the focus voltage ( EC3) is supplied directly to the focusing electrode of the CDT 106.

In addition, the CPM controller 113 is supplied to the CPM 104 using an electronic magnetic to eliminate the inconvenience of mechanically driving the color purity adjustment stimulus and the electron convergence stimulus of the CDT 106. To adjust the voltage.

EB 114 is to supply a high voltage of 0V to 40KV to the anode terminal of the CDT 106, SMPS (Switching Mode Power Supply) is to supply DC power to each stage of the system, the power supply unit 116 Is distributed to each stage by receiving AC input voltage and automatically turns off when overload occurs in the system.

3 is a layout view of the main operation unit 4, in which, reference numeral 201 denotes an AUTO 1 start switch for automatically checking TOUCH, LIC3, and LIC2 TEW, and 202 denotes whether there is contact between electrodes of each part. TOUCH switch to check whether 203 is a LIC3 switch to check G3 leakage current, 204 is a LIC2 switch to check G2 leakage current, 205 a TEW switch to check the initial emission radiation (Emission Worm-up Time), 206 is KS switch to check the state of K surface (K- 不, SPOT, HALO), 207 is STC switch to check OVC, CCV, encapsulation angle, etc., 208 is PS, LE, HRS, M block, M deformation, etc. SCN.S switch to check 209, SCN.M switch to check color purity, SCN.W switch to check color purity, 211 to DF switch to check DEFOCUS, 212 to check G3-based stray S.E3 switch, 213 is G2 stray S.E2 switch, 214 is G1 stray S.E1 switch to check this, 215 is the RIGHT KEY to check the movement to the right in manual mode, 216 is the LEFT KEY to check the movement to the left in manual mode, 217 is EKCO, AUTOII start switch to check MIB automatically, 218 is R, G, B EKCO test and EKCO switch to test EKEK, 219 is MIB switch to check EM IK, 220 is high voltage part, focus, Power off switch for turning off the screen deflector and preparing for bulb inspection. 221 is a READY switch that lights up when the contact between the bulb and the socket holder is good and prepares for bulb inspection. 223 is the G raster selection switch, 224 is the B raster selection switch, 225 is the UNDER / OVER switch to adjust the screen size (80%, 120%), 226 is the EC2 VR, the G2 volume for K-side inspection, and 227 is the equipment start-up. For the safety of this worker, EB ON switch, which must be turned ON together to enable operation, 228 is an MS switch that measures the slump of the initial measured value of the MIB and the measured value after 10 seconds, and 229 is the leakage current between the heater and the cathode. LIHK, 230, is used to measure the gas ratio of the CDT (GR), 231 is IF, which measures the current flowing in the heater.

The operation of the main operation section 4 configured as described above is as follows.

First, when the CRT is normally inserted in the initial condition, the READY switch 221 is lighted on, and only in this condition, all the keys are operated.

The initial operation starts when the EB ON switch 227 and each key are pressed simultaneously for safety considerations. When the AUTO I start switch 201 is pressed, the TOUCH switch 202, the LIC3 switch 203, and the LIC2 switch 204 are pressed. , TEW switch 205 and LIHK switch 229 are automatically checked.

After each inspection item progress, if the good quality LED 32 lights up in green and is automatically transferred to the next process, if it is defective, the LED 32 lights up in red and voice alarm sound is generated and the inspection progress is stopped. At this time, when the indication value on the display panel shown in FIG. 4 is also bad, the measured value is displayed as it is, and a warning message is sent in a continuous flashing state, and when it is normal, only the measured value is displayed.

In case of single unit inspection of AUTO I unit, press EB ON switch 227 and one of the corresponding keys at the same time to stop and wait after manual inspection without automatic inspection.

If the entire AUTO I is passed, it is automatically passed to the manual mode K-S switch 206 (Cathode Condition), and from this time, the sequential screen can be inspected by one operation of the RIGHT KEY. If it is necessary to reconfirm the past function, the left key switch (215; LEFT KEY SW) is used, and manual keys that do not require inspection items are skipped by a controlled program to improve productivity, and the light key function selects only the input key. It is done. At this time, if reconfirmation is required, press each key to operate.

Inspections to be carried out after sufficient heating are carried out in AUTO II.

EKCO and DELTA EKCO are simultaneously measured by pressing the AUTO II start switch 217, and then the measurement is completed by the same method as the AUTO I function in the order of MIB switch 219 and MS switch 228 (MIB SLUMP SW). Once passed, the system will automatically remove the bulb easily with the OFF door.

The power off switch 220 is used when an emergency stop is required even during an inspection, and an infrared sensor is attached as shown in FIG. 1 for safety. Is sensed and immediately passed to the power off switch 220 to allow the system to stop.

4 is a display panel, the biggest feature of which is that each indicator is digital, and when the value is not good, the value itself blinks continuously and the program is continuously This is an alarm system. This is a cost saving and spaced display method because a separate LED is not used for a large number of displays. In addition, the measured values are memorized immediately, so that the entire value is displayed until it is turned off after the test is completed. Moreover, the measurement data is automatically memorized even if the system is turned off.

In order to easily set the determination reference value in the automatic mode, after each display, a digital BCD switch 303 is mounted so that anyone can easily input when changing specifications.

The function of each unit will be described below.

First, the state of supply electrode voltages Eb, EC3, EC2 is displayed on the unit 325 during the measurement, the electrode leakage current is measured at the unit 326, and measured at the TEW SEC 313 which measures the radiation capability of the electron gun. do. In addition, when the radiation current amount is set in the TEW-IK 314, the indicator lamp 311 is turned on, and the value flowing through each of the electron guns R, G, and B display units 308, 309, and 310 is measured in 0.1 second units, and the set time is 0.1 seconds in units. It is indicated by, and the set time is indicated by 0.1 second unit, and it is completed automatically if the R, G, B radiation current value passes even before the set time. In addition, during the MIB measurement, the lamp 312 is turned on and the set values automatically set on the display units 308, 309, 310 are displayed, and the maximum anode current of the electron guns R, G, and B is measured by the display units 305, 306, 307, respectively. At this time, the basis of the set value is calculated by substituting the values of the electron guns R, G, and B display units 315, 316 and 317 measured by EKCO.

The lower limit value of the set voltage of the EKCO is set on the display unit 320, the upper limit value is set on the display unit 319, and each electron gun deviation value is set on the digital switch, and then R, G, and B measured values are displayed on the display units 315, 316, and 317. Based on the data, the EKCO value is automatically calculated and displayed on the display unit 318.

The above has described only the basic functions, and other additional inspection functions can be displayed as well as being selected by using the existing keys repeatedly.

5 is an external operation panel diagram at the interface between the microcomputer and each control unit. First, the reset switch 401 is a switch having a self-diagnosis function when calibrating the system. The indication of the display panel should be reset to 0, and the state of the indicator is changed by changing the BDC switch indicator 303,304,313,314,315,320,321 to facilitate calibration by starting operation from applying the set BCD switch indicator 303,304,313,314,315,320,321 to 0000. After the observation, the diagnosis is performed. This function is called modified self mode, and the BCD switch and the display value can be correlated with each other for convenient calibration.

For a clear self-mode calibration, the internal system incorporates an ultra-precision reference voltage source, and this value is measured after A / D conversion and offset adjustment is made in case of error. In addition, the measurement supply voltage that is changed for each inspection item is classified into a high voltage 402, a focus voltage 403, and a screen voltage 404, and installed in SEMI VR to be easily preset.

6 shows a Convergence Purity Magnetic (CPM) controller, which is an electronic magnetic adjustment unit. First, a volume group 501 for presetting a variable range of a magnetic field, an adjustment volume group 502 for supplying an actual voltage, and a required magnetic field. It consists of the ON switch group 503 used when only operating.

FIG. 7 is a diagram showing the Universal Deflection System supplied to DY (Deflection Yoke) and CRT. First of all, the system has a CRT inspection function as a whole system when it is mounted, and an ITC ( It functions as Interal Tube Componet (YA) and DY YAM (Yoke Asembly Mashine). Therefore, since the use is diverse and the maintenance is difficult, the function is clearly separated and manufactured by unit so that defects can be easily repaired by replacing the board during operation. In particular, in the case of upgrading the deflection system, only some units can be used.

The power stage 624 is applied to the SMPS system to supply power to the entire system, and lower the power consumption.

The signal generator 625 generates a synchronization signal between the image driver and the deflection stage, and the basic pattern generates and supplies a cross hatch and a raster pattern.

The cross hatch must be inserted with a box marker in the left corner to check the polarity of the DY.

The synchronization and vertical section 26 (SYNC VERTICAL) generates a vertical deflection output to be supplied to the oscillator at the vertical and horizontal stages. In addition, by generating and processing the synchronous control signal, impedance matching is automatically fed back without a selection switch, and a high output linear amplifier corresponding thereto is designed. In particular, the vertical and horizontal variable volumes 614 and 615 were installed to preset the screen size according to the OVER UNDER SCAN, and the V linearity adjustment switch 617 and the vertical horizontal deflection off switch 613 were configured.

The horizontal deflection unit 627 generates a stable horizontal deflection output through the H synchronization signal supplied from the synchronization unit and the vertical unit 626.

H-CENTER unit 619 for adjusting the H-CENTER is made of a VR that can be changed, the ON, OFF switch 618 to control this function ON, OFF, and SIDE PCC volume 620 to correct the peripheral portion Is provided, and the H-LIN section 621 which adjusts the horizontal linearity is comprised by the hexadecimal BIN switch. The DY impedance matching switch 622, which is the core of such a unit, uses a hexadecimal digital method and the following method, which has not been solved even by a foreign product (MECC).

In the conventional method, after measuring the DY and horizontal impedance to be used first, the matching switch was set to the marked position of the system, and then the power was supplied. In the application method, the LED 630 is automatically turned on most brightly when the power is supplied without measuring the impedance value and normal matching is performed. In the case of a mismatch, the LED 630 is turned off, and thus the fine tuning point can be easily found when the switch 622 is continuously changed while the power is supplied.

The high voltage unit 628 generates the high voltage EB, the focus voltage, and the screen voltage, and the panel indicator 29 measures the heater voltage and the cathode voltage of each of the R, G, and B signals through the selector 602 to measure the digital meter 601. ).

The H. position volume 603 adjusts the horizontal movement of the arc, and the V. position volume 604 adjusts the vertical movement of the screen.

If the selection switch 602 is changed, the heater voltage and the applied voltages of RK, GK, and BK are displayed on the digital meter 601.

[Effects of the Invention]

As described above, according to the present invention, the dynamic / static characteristics of CPT and CDT can be quickly and accurately performed within 30 seconds, minimizing the loss due to model changes when producing small quantities of various types of tubes, and promptly in case of failure of inspection equipment. Not only can it be repaired, but it is also easy to classify the data through PC-to-PC transfer of inspection data, and it can greatly contribute to the improvement of CRT productivity.

Claims (1)

After the test is executed in the condition that the test item is set as the criterion for the test, the result is automatically memorized and displayed. If the test result is defective, the displayed measured value blinks and a warning is issued. The meter and the display unit 101 connected to the microcomputer and the interface unit 108 and the data bus while exchanging information to exchange information; A keyboard 107 in which a key for manipulating each inspection order and a quantity / failure of the inspection are displayed in red and green on a separate keyboard; A signal generator 109 for generating a video pattern according to system driving; A video output unit 102 which amplifies the micro signal generated by the signal generator 109 into a signal that can be displayed on the CDT 106 and employs a direct coupling amplifier to realize high resolution; A relay matrix unit 103 arranged in the video output unit 102 unit board and arranged close to the CDT 106 to realize high resolution; A vertical deflection unit V-DEF 110 that receives the driving signal of the synchronization signal applied from the signal generator 109 and supplies vertical deflection power to the V-DY 105; A vertical deflection unit H-DEF 111 for amplifying a horizontal deflection power after receiving the synchronization signal and the driving signal applied from the signal generator 109 and supplying the H-DY 105 to the focusing point of the CDT 106; An EC3 and EC2 unit 112 for supplying a voltage for the screen electrode; A CPM controller 113 for adjusting a voltage supplied to a CPM 104 using an electronic magnetic; An EB 114 for supplying a high voltage of 0V to 40KV to the anode terminal of the CDT 106; An SMPS 115 for supplying D.C power to each stage of the system; A. C. Dynamic / positive CRT characteristic inspector, characterized in that it comprises a power supply unit 16 that is applied to the input voltage and distributed to each stage, and is automatically turned off when overload occurs in the system.