KR970006401B1 - Device and method for deciding position of a cathode-ray tube screen - Google Patents

Abstract

None.

Description

Positioning device and positioning method of cathode ray tube screen

1 is a perspective view of a suspension darkroom system according to the present invention provided with a link system for performing automatic adjustment / positioning in the X direction (to simplify the drawing, the Y-direction automatic adjustment / positioning means is not shown).

FIG. 2 is a partially cutaway perspective view of the darkroom system of FIG. 1 with the slide opalbo revealing the link system being removed to perform automatic adjustment / positioning in the Y direction.

3a and 3b show the flatness of the darkroom system of FIG. 1 showing the jaws placed in the open and closed states, respectively.

4 is a perspective view of a suspension type darkroom system of Korean Patent Application No. 8042/1993.

* Explanation of symbols for main parts of the drawings

CX: Air Cylinder DB: Darkroom

J1, J2: Joe L1, L2, L3, L4, L5, L6: Link

Mn: Monitor STx, STy, STz: Stop

The present invention relates to a method and apparatus for performing positioning of a monitor to be inspected.

A patent application (US Patent Application No. 08 / 059,779 or Korean Patent Application No.8042 / 1993) filed by the same applicant as the applicant of the present application discloses a method and system for testing a series of monitors intermittently transported on a conveyor. It is. As shown in FIG. 4, the system according to Korean Patent Application No. 8042/1993 is composed of a dark room DB that supports an electronic camera CCD at one end. In order to inspect the monitor Mn transported in the first horizontal direction X on the conveyor, the dark room DB is pulled by the operator toward the monitor Mn, and the relative position between the dark room DB and the electronic camera CCD is Locking ensures accurate alignment between the lens of the camera and the center of the screen of the monitor and the exact distance between the lens and the center. This positioning operation is performed only by hand.

In the prior art, positioning means or stops STx, STy and STz are provided for positioning the darkroom relative to the monitor in all directions X, Y and Z. The positions of the stops STx and STy in the dark room are manually adjustable to accommodate different widths and heights of different monitors. In practice, it is not necessary to adjust the stop STz because the distance between the lens and the monitor is determined according to the size of the monitor and therefore fixed at a constant value. However, the stop part STz only prevents forward movement of the monitor to the dark room where the focus becomes inaccurate but does not prevent backward movement. For this reason, the dark room DB is preferably provided with a fixing means for ensuring the safety of positioning in the Z direction by actuating pneumatically and pushing the monitor towards the stop STz, in fact the dark room CB. Silver does not have a bottom at the front end (as shown in the embodiment of FIG. 1C of the prior art). This enables the operator to fit the dark room (DB) on the monitor (Mn) from the top while performing the positioning, making the positioning work easier. This reason is simple. That is, since the space under the monitor is occupied by the conveyor or by the rotary stand supporting the monitor, the freedom of movement for positioning is reduced. If the dark room is directly fitted to the monitor instead of being fitted on the monitor from above, the positioning becomes difficult because the degree of freedom in this space is small.

Positioning in the three directions X, Y, and Z as described above and adjustment of the corresponding positioning means STx, STy and STz are made completely manually. When inspecting a monitor with a dimension different from that previously examined, the operator shall manually adjust the stops (STx) and (STy) to the corresponding positions by measuring the size of the monitor before starting with positioning. Preliminary adjustments and subsequent positioning, which are done entirely by hand, are a large part of the overall inspection process.

Accordingly, it is an object of the present invention to improve the speed and efficiency of the inspection process by automating the above-mentioned positioning and adjustment as much as possible.

In the prior art, if necessary, adjustment work is performed by hand in advance. Then, by pulling the dark room close to the monitor, positioning in all directions X, Y, and Z is performed.

Even in the case of a monitor different in size from the preceding monitor, it is preferable that the preliminary adjustment work be omitted. It is desirable to be automated so that the adjustment of the stops STx, STy and STz and the positioning in the individual directions X, Y and Z can be performed automatically when the dark room is pulled close to the monitor. However, in these automatic adjustments / positioning, in some cases, they are actually unnecessary, impossible or economical. Thus, no specific automation in these parts is necessary.

For example, as mentioned above, the stop part STz can hardly be adjusted in practice by hand, and therefore a method of automatically adjusting should be taken. Automation in the Z direction only involves positioning in this direction. Positioning in the Z direction is very simple. There is a need to provide only a power driver (preferably using an air cylinder) to push the darkroom in the Z direction until the stop STz contacts the front edge of the monitor.

Automation in the X and Y directions involves adjustment of the stops STx and STy and positioning in the X and Y directions, which is much more complicated than automation in the Z direction.

As mentioned above, the degree of freedom is reduced by the complex space under the monitor. Therefore, automatic adjustment / positioning in the Y direction is different from that in the X direction. The automatic adjustment / positioning in the X direction will be discussed first. The automatic adjustment of the stop part STx and the automatic positioning in the X direction include the stop part STx (in this case, they are not fixed in the dark room and movable relative to the dark room) at both sides of the dark room and the left and right sides of the monitor. It can be achieved simultaneously when moving inwards towards the monitor until each contact (such as two jaws of a clamp of a pair of forceps). Then, the adjustment of the stop part STx and the positioning in the X direction are realized by the corresponding both stop parts STx approaching each other.

To carry out such automatic adjustment / positioning in the X direction, two requirements must be met. First, an automatic control drive / motor means must be provided to move the stop STx to various corresponding appropriate positions of different monitors. In practice, the stop STx is moved until it comes into contact with both sides (left and right sides) of the monitor to be inspected.

Next, no matter which way the still part STx moves, the electronic camera CCD should always keep its center aligned (that is, it should be coaxial with the center of the screen of the inspected monitor). .

To meet the second requirement, the stops STx at both sides of the darkroom DB must divide the darkroom symmetrically (parallel to the XY plane or perpendicular to the X side) and always maintain a constant distance from the intermediate vertical plane. do. From this, the lens can aim exactly at the middle of the screen after performing in the X direction without slight left and right deviation.

The fact that the stops STx at both sides of the dark room DB should not preferably be arranged in pairs symmetrically to the intermediate vertical plane (ie it should not be arranged mirror-symmetrically with respect to this plane). It is worth noting. In other words, the cooperating stop STx may be located at a different height. However, the corresponding (or acting) stops STx at both sides of the intermediate vertical plane should always be located in an arrow-like plane parallel to the XY plane (or perpendicular to the Z axis). Only in such coplanar action the opposing forces (components in the X direction) exerted on both sides of the monitor by the stop (STx) are balanced without causing a force around the vertical axis that the monitor can turn left or right. Can be maintained.

In order to always keep the stops STx at both sides of the darkroom at the same distance from the intermediate vertical plane, but to keep these stops STx in an adjustable state, they must be cooperative at both sides of the darkroom. The movement of the stationary part STx always has the same components, but the orientation of the stationary part STx must be made such that its orientation is opposite to the X direction (where the azimuth is moved in the positive X direction or the negative X direction). Also, to ensure that the corresponding stop (STx) is always in the arrow-shaped plane, but in an adjustable position, the movement of the corresponding stop on both sides of the darkroom is always Z Transmission of the stop part STx must be made to have the same direction and the same direction in the direction.

In order to satisfy both requirements, various types of transmissions have been conventionally employed. However, of many transmissions, the music rack type link system is the simplest and most desirable. This will be described in detail below.

As mentioned above, since the space under the monitor Mn has a relatively small degree of freedom, the clamping type automatic adjustment positioning, which was well performed in the X direction, is not performed well in the Y direction. Due to the small degree of freedom of the space under the monitor, and due to the fact that the darkroom has no bottom at its shortest part, the maintenance part STx is provided only at the top (not the bottom) of the darkroom and will come into contact with the top of the monitor. Until it is pushed down. However, since the corresponding stop portion STx at the bottom of the dark room cannot approach symmetrically from the opposite side (from below) and cannot center the monitor Mn with respect to the lens of the electronic camera, The adjustment cannot be made completely automatically due to the centering problem. In order to solve this problem, the electronic camera is not fixed in the darkroom, but is mounted on a slide cantilever slidably mounted in the darkroom. The slide cantilever is slidable perpendicularly to the darkroom and supports the stop STy and the electronic camera CCD mounted on the upper portion of the darkroom in the present application. The height difference between the lens of the camera and the stationary part STy may be manually adjusted. Before inspecting the monitor, the distance between the center of the screen and the top thereof is first measured, and the distance difference between the camera and the stop STy is adjusted accordingly. Thus, when the slide cantilever is pressed and the stop STy comes in contact with the top of the monitor, the lens of the camera is exactly aligned with the center of the screen.

Another problem that arises in automatic adjustment / positioning is the simultaneous adjustment / positioning in three directions X, Y and Z. In Korean Patent Application No. 8042/1993, adjustment of the stop parts STx, STy and STz and positioning in the three directions X, Y and Z are made separately. First, the stops STx and STy are manually adjusted to move to an appropriate position according to the size of the monitor to be inspected. The monitor and darkroom are then manually pulled together and forcedly positioned relative to each other by the stops STx, STy and STz. Here, forcible positioning in the X, Y and Z directions is performed at about the same time. Since the positioning is done manually, it is not difficult to perform some sensitive and complicated operations to carefully fit the monitor into the frames of the stops STx, STy and STz. There is no problem in the adjustment of simultaneous positioning of three directions X, Y and Z. In other words, movement in (e.g., X direction) does not interfere or interfere with each other, since the operator minimizes resistance in all directions by smoothly moving the darkroom with his highly sensitive hand. However, such a method of paying close attention is not possible in the case where automatic positioning is performed, especially if the stop in one direction, that is, the stop in one direction or the stop in multiple directions should be adjusted automatically. In the case of actual automatic adjustment / positioning, the automatic machine should not be complicated in consideration of economic aspects. Thus, the automatic machine only performs a few simple operations. When adjustment / positioning in all directions X, Y and Z is performed simultaneously, when adjustment / positioning in one direction (for example, X) is performed simultaneously, the adjustment / positioning in one direction (for example, X) is mutually Because of the obstruction, automatic machines that perform only a few simple movements will not be able to perform complex operations (which can be easily performed by hand) to eliminate mutual interference. As a result, positioning in one direction is also impossible due to incorrect adjustment of the adjustment / positioning in the other direction.

Accordingly, another object of the present invention is to provide a method for solving the problem that the adjustment of the adjustment / positioning in various directions X, Y and Z becomes poor when the adjustment / positioning is automatically performed.

According to the method of the present invention, the solution is simple. The automatic adjustment / positioning in three directions can be performed separately in three steps, not at the same time. It is preferable to perform positioning in the Z direction first. Then, positioning in the X direction is preferably performed. Then, automatic adjustment / positioning in the X direction is performed, and finally automatic adjustment / positioning in the Y direction is performed (however, the order need not necessarily be the order of Z-X-Y). For example, it is also possible to perform in the order X-Y-Z or Y-X-Z. Importantly, the automatic adjustment / positioning in the three directions X, Y and Z is performed separately in three steps. In each step, there is no problem of inaccurate adjustment between adjustment / positioning in the other direction since only adjustment / positioning is made in one direction.

[According to the present invention, only the positioning is automatically performed in the Z direction and no automatic adjustment is made. In the X and Y directions, automatic adjustment and automatic positioning are performed at the same time. Here, in order to avoid confusion, it is judged that a clear and clear explanation of so-called adjustment and positioning is necessary.

The adjustment in the X, Y and Z directions refers to positioning the stops STx, STy and STz relative to the darkroom DB in the appropriate places for various different sizes of the monitor.

Positioning in the X, Y and Z directions means that X, Y is in contact with the inspected monitor until the monitor can no longer move (so-called forced positioning) relative to the dark room in the X, Y and Z directions. And moving the stops STx, STy, and STz in the Z direction.

According to this definition, the adjustment in the X and Y directions in Korean Patent Application No. 8042/1993 is first performed manually. Then, positioning in the X, Y and Z directions is performed manually. In the present invention, the stop STy is manually adjusted with respect to the electronic camera, but automatically with the dark room. Therefore, the adjustment in the Y direction is performed completely automatically as described above. This will be described in detail later.]

As described above, it is preferable that the adjustment / positioning in the Z direction is performed first, and since it is unnecessary to adjust the stop part STz according to various sizes of the monitor to be inspected, the driving means in this direction Z Positioning in the Z direction is completed by causing CZ (preferably an air cylinder) to push the dark chamber DB out of the monitor group until the stop STz comes in contact with the front of the monitor. Then, automatic adjustment / positioning in the X direction can be started using the above-described music stand-shaped link system. After the automatic adjustment / positioning in the X direction is completed, the automatic adjustment / positioning in the Y direction can be performed by pressing down the slide cantilever until its stop STy comes in contact with the top of the monitor ( Needless to say, the height difference between the STy and the lens of the camera must be manually adjusted to an appropriate value in advance.)

The slide cantilever is driven by a drive means CY (preferably an air cylinder) to move vertically. For positioning in the Y direction, it is necessary to slightly lower the top of the stop STy monitor. The pressure required to stabilize the monitor is so small that even though there is no opposing lower stop STy to support the monitor from below, the monitor can be tilted forward by this pressure and balance the downward pressure. There is no risk of aligning the center alignment with the lens of the camera.

As described above, after the height difference between the stationary part STy and the electronic camera is fixed, it also moves vertically in synchronization with the sliding cantilever. In order to move the slide cantilever vertically, a drive means CY, which is preferably made of an air cylinder, is provided.

From the above description, it can be seen that most of the adjustment / positioning in all directions X, Y and Z in the present invention is achieved automatically (and preferably driven by air pressure). The adjustment by means only measures in advance the distance from the top of the monitor to the center of the skin, and manually adjusts the height difference between the stop STy and the lens of the electronic camera according to this value. If all monitors are the same size, in the continuous inspection of the monitors, this manual adjustment is unnecessary.

Hereinafter, the basic principle to the present invention through the preferred embodiment illustrated in the accompanying drawings will be described in detail.

In FIG. 1, as mentioned above, the transmission means for automatic adjustment / positioning in the X direction includes two side-by-side links L1, L2 and L3, each of which its free end is long. Music stand shape is composed of a pair of claw jaw (J1) (J2) rotatably connected to the end of L4), the base of which is pivotally connected to the seat (S) fixed to the upper portion of the dark room (DB), respectively. It is preferable that it is a link system. In addition, two short links L5 and L6 are provided, the base being pivotally connected to one end of the air cylinder CX and the other end fixed to the seat S. The end of each of the shorter links L5 and L6 is pivotally connected to the middle portion of each of the long links L1 and L2.

Therefore, when pressure is applied to the air cylinder CX, the jaws J1 and J2 are tightened inwardly (and forwardly) to create a compressive force of the X-direction component, so that the sideways movement is no longer possible. The monitors are fixed on both sides to prevent damage (see also part 3B).

The stops STx and STy are provided at or near the free end of the jaws J1 and J2. The link system is arranged symmetrically in the middle vertical plane (not shown) of the darkroom DB. Therefore, no matter where the jaws J1 and J2 are located, the paired stops STx or STy always maintain the same distance from the intermediate vertical plane and in an arrow-shaped plane parallel to the XY plane. Note: Two stops STx co-operating in both jaws J1 and J2 are located in the first arrow-shaped plane, and the other two stops STx ' It is positioned in the plane of the arrow. Thus, the two non-cooperative stops STx STx 'do not lie in the same arrow-like plane.]

The stop part STx rotates slightly when it comes in contact with the monitor to ensure frictionless contact and non-abrasion contact with the surface of the monitor and the portion absorbing the impact energy between the jaws J1, J2 and the monitor Mn. It is preferred to be configured in the form of a vertical roller that provides an effect. A pair of stops STx cooperating is sufficient to perform stable positioning in the X direction, but if a pair of stops STx 'are provided, a pair of stops STx is treated. In the case where the monitor is very large or very special case which is difficult to do, it is possible to securely fix the monitor in this direction (X) without being scratched. Due to the separate pair of stops STx ', the contact between each jaw J1 (J2) and the monitor is not linear (line defined by a single roller STx) but flat (two rollers STx). ) Is a plane defined by (STx ').

The lengths of the long links L1-L4 are the same, the links L1 are always parallel to the link L3, the links L2 are always configured parallel to the link L4, so that each two parallel By defining the quadrilateral, the cooperating paired stops STx (STx ') always remain in the same plane as the same arrow-like plane parallel to the YZ plane.

In Korean Patent Application No. 8042/1993, a clamping means for pressing the monitor from the back is provided to prevent the rearward movement of the monitor, thereby ensuring positioning in the Z direction. In the present invention, the necessary clamping means may be configured in the form of an extended arm (not shown) and may be provided on the outside of each jaw. The operation and of auto-adjustment / positioning in this embodiment will be described.

As mentioned above, the stop portion STz requires little adjustment when used in practice. As in Korean Patent Application No. 8042/1993, the stop part STz may be fixed to the inner wall of the dark room. In order to perform automatic positioning in the Z direction, the air cylinder CZ may contact the dark chamber DB with the front edge of the monitor Mn until the stop STz contacts the front edge of the monitor Mn. Push the dark room (DB) toward the monitor (Mn) until

As in the case of Korean Patent Application No. 8042/1993, a limit switch LS may be provided near the stop part STz. Before (or when) the stopper STz contacts the monitor Mn, the limit switch LS is contacted before (or at the same time) and actuated, thereby essentially operating with Korean Patent Application No. 8042/1993. A similar series of control or operating steps will begin. Detailed description thereof will be omitted.

Then, automatic adjustment / positioning in the X direction is performed. After the positioning in the Z direction is completed, power is supplied to the cylinder CX so that the cylinder is moved inward to the jaw J1 (J2) until the jaws J1 and J2 come into contact with both sides of the monitor Mn. ) Closes the automatic adjustment / positioning in the X direction.

Finally, automatic adjustment / positioning is reached. As described above, the stationary part STy and the electronic camera CCD are settled on the slide cantilever SR symmetric to the middle vertical plane of the darkroom, so that the lenses of the stationary part STy and the camera CCD are on this plane. Will be located. The air cylinder CY moves the whole slide cantilever SR perpendicularly to the dark room DB. The slide cantilever has a substantially inverted L shape (uppercase gamma shape), and has a vertical arm on which the camera CCD is fixedly adjustable, and a horizontal arm (beam) on which the free end supports the stop STy. . As soon as the automatic adjustment / positioning in the X direction is completed, the slide wa palbo SR is pressed by the air cylinder CY until the stop STy contacts the upper part of the monitor. This completes the automatic adjustment / positioning in all directions X, Y and Z. [Of course, the monitor being inspected is in the proper position on the vertical arm of the sliding cantilever SR before the previous automatic positioning begins. It must be adjusted to set.]

The slide cantilever does not necessarily have to be mounted to move along the middle vertical plane of the darkroom (DB). It may be mounted to move in the X direction to the left or right of the intermediate vertical surface. This variant audits some special motels of eccentric (asymmetric) monitors in which the screen is not symmetrically designed and the center of the screen is not exactly positioned at the center of its front but is moved slightly right or left from the center of the front of the monitor. Can be used to

In addition, if the sliding cantilever SR is slightly deformed, the centering of the lens of the electronic camera is incorrect. For this reason, a known guide means (not shown) may be provided at the front end of the horizontal arm of the slide cantilever SR (to correct, if necessary) to prevent deformation of the slide cantilever SR.

If the distance difference between the stop STy and the lens of the camera CCD is manually given, all other adjustment / positioning can be performed completely automatically without any manual work.

Claims (11)

An inspection apparatus for inspecting consecutive cathode ray tube screens moving intermittently on a conveyor moving in a first horizontal direction X, comprising an elongated dark room DB extending in a second horizontal direction Z perpendicular to the direction X, wherein The dark room DB is supported so as to be able to move freely in all directions X, Y and vertical direction Z, the front end of the dark room engages the screen during the inspection, and the dark room in the directions X, Y and Z In the inspection apparatus in which fixing means STx, STy, and STz for forcibly determining the position of the screen with respect to DB are provided, an upper portion of the dark chamber DB is provided with the stop means STx. Drive means Cx and a transmission means, and the transmission means has a corresponding stop means STx at both sides of the dark chamber DB on a vertical surface YZ defined by the Y and Z directions. Minutes of the darkroom parallel The drive means Cx are located in a common arrow-shaped plane of the dark chamber DB parallel to the vertical plane XY defined by the X and Y directions, so that the distance to the intermediate vertical plane is always kept the same. Is operated, the baby corresponding stop means STx at both sides of the dark chamber DB are moved in the same direction in the opposite direction in the X direction, and the same component in the same direction in the Y direction. Inspection device characterized in that the movement is made. According to claim 1, wherein the transmission means is provided in the upper part of the dark room (DB) is a link system in the form of a music rest defined by a link symmetrical to the intermediate vertical plane of the dark room (DB) Characterized in that the inspection device. 3. The link system according to claim 2, wherein the link system consists of at least two pairs of opposing long links L1, L2 and L3, L4 and a pair of opposing short links L5, L6. The driving means Cx is a reciprocating means extending in the Z direction, one end of which is fixed to an upper end of the dark chamber, and a base of the long links L1 to L4 is formed of the dark chamber DE. It is pivotally connected at the top, and its ends are pivotally connected to two jaws J1 and J2 respectively supporting the stop means STx, and the short links L5 and L6 are respectively. Each base is pivotally connected to another end of the drive means Cx opposite its fixed end, and the ends of the short links L5, L6 are connected to the long links. Inspection device, characterized in that the pivot between the two front link (L1), (L2) respectively. 4. An inspection apparatus according to claim 3, wherein the reciprocating means (Cx) is an air cylinder acting in the Z direction. The driving means (CZ) according to claim 1, wherein the inspection device performs positioning in the Z direction to move the dark chamber DB in the Z direction until the stop means STz contacts the edge of the screen. Inspection apparatus comprising a. 6. The inspection apparatus according to claim 5, wherein the driving means (CZ) is an air cylinder acting in the Z direction, and one end thereof is fixed to one end of the dark chamber (DB) away from the screen. The method of claim 1, wherein the inspection device is composed of an L-shaped sliding cantilever SR which is movable vertically with respect to the dark room DB and extends in the divided intermediate vertical plane of the dark room DB in the Y direction. And positioning means for performing positioning, wherein the sliding cantilever SR comprises a horizontal arm on which the stop means STy is mounted, and a vertical arm on which the electronic camera is adjustable. Characterized in that the inspection device. 8. The inspection apparatus according to claim 7, wherein the inspection apparatus includes the sliding cantilever SR until the stationary means STy contacts the upper portion of the screen. 9. The inspection apparatus according to claim 8, wherein the driving means (CY) is an air cylinder fixed to an upper portion of the dark chamber and acting in the Y direction. An inspection method for inspecting a series of cathode ray tube screens intermittently moving in a first horizontal direction X using an elongated dark room (DB) extending in a second horizontal direction Z perpendicular to the direction X, each screen being inspected. The screen is characterized in that the positioning of the screen relative to the dark room (DB) in the direction X, Z and vertical direction Y is performed separately in three steps. The inspection method according to claim 10, wherein positioning in the Z direction is performed first, then positioning in the X direction is performed, and then positioning in the Y direction is finally performed.