KR20080032935A - System and method for measuring wobble of image display device - Google Patents

Abstract

A system for measuring wobble of an image display device and a control method thereof are provided to improve reliability of wobble measurement by using a wobble measurement system and measuring wobble of a screen module of the image display device quantitatively. A system for measuring wobble of an image display device comprises a wobble measuring unit(10) and a calculation processing device(100). The wobble measuring unit measures displacement of the wobble of a screen module when the screen module is wobbled. The calculation processing device acquires wobble variables showing a wobble state of the screen module on the bases of data measured by the wobble measuring unit, and judges wobble characteristics of the image display device according to the acquired wobble variables.

Description

System and Method for Measuring Shake of Image Display Device and Control Method thereof

1 is a view for explaining the appearance of the product and the shake measurement operation according to the prior art of the general video display device.

2 is a view showing the configuration of a shake measurement system according to the present invention.

3 is a diagram illustrating an example of attaching a tip to a measurement position searched using a laser pointer for the shaking measurement according to the present invention.

4 is a view showing an example of attaching the tip to the outside of the measurement object using the adhesive material according to the present invention.

5 is a diagram illustrating an example of applying a load to a measurement target using a push pull gauge according to the present invention.

6 is a block diagram of a shake measurement system according to the present invention.

7 is a view showing the exhaustion time and the maximum displacement of the shake calculated from the measurement data when measuring the shake using the shake measuring system according to the present invention.

8 is a view for evaluating the shake level of the previously prepared evaluation coordinates based on the exhaustion time and the maximum displacement of the shake calculated according to the present invention.

9 is a flowchart illustrating an operation of measuring shaking by using the shaking measuring system according to the present invention.

10 is a diagram showing an example of displaying the results of analyzing the data measured using the shake measuring system according to the present invention with an analysis program and information on the shake level.

* Description of symbols on the main parts of the drawings *

10: shake measurement unit

30: support

40: support plate

100: arithmetic processing unit

The present invention relates to a shake measuring system and method of a video display device, and more particularly, to a shake measuring system and method of a video display device capable of quantitatively measuring shake of a video display device.

Video display devices, such as televisions and monitors, tend to be thinner and have larger screen sizes, and the appearance of the product is changing. Such an image display device 1 is composed of a screen module 2 having a thin and wide screen as shown in FIG. 1 and a support plate 2 supporting the screen module. The display module (2) is supported on the support plate (3), the size of the support plate (3) is made more compact in order to meet the needs of users who want a beautiful product design. Since the size of the screen module 2 is relatively larger than the size of the support plate 3, when the operation panel provided on the outside of the screen module 2 is operated, the position of the screen module 2 is distorted or shaken, thereby reducing operability. There is a possibility of excessive shaking when carrying the product. For this reason, it is tested whether the shaking of the screen module 2 excessively occurs in the process of producing a video display apparatus.

According to the prior art, as shown in Figure 1, the operator shakes the screen module 2 by hand and emotionally judged to evaluate the level of shaking for the product.

Although the operator could roughly evaluate the shaking of the product by looking at the shaking state of the product, according to the prior art, the evaluation result of the shaking is often different according to the product model, and the reliability of the evaluation according to the skill of the operator Because of this decision, there is an urgent need for a measurement system that can ensure high reliability regardless of the product model.

An object of the present invention is to provide a shake measuring system and method for quantitatively testing the shake of an image display device.

Another object of the present invention is to provide a shake measuring system and method for quantitatively testing shake to ensure high reliability of an evaluation result of shaking of an image display apparatus regardless of a product model.

The present invention for achieving the above object, in the system for measuring the shaking of the video display device having a display module and a support plate for supporting the screen module, when the screen module is shaken, Shake measuring unit for measuring the displacement; And an arithmetic processing unit obtaining a shake variable indicating a shake state of the screen module based on the data measured by the shake measuring unit, and determining a shake characteristic of the image display device according to the obtained shake variable. .

The shake measuring unit and the operation processing device further includes a movable support plate that can move in the state.

Install the wheel on the bottom of the movable support plate.

The shake measuring unit includes a displacement measuring wire attached to the outside of the screen module, and a displacement sensor that receives the wire and converts the length change of the wire into an electrical signal and outputs the electrical signal.

The shake measuring unit further includes a tip suspended from one end of the displacement measuring wire, and a sensor holder for supporting the displacement sensor.

The tip is attached using an adhesive material.

The measuring system further includes a shelf on which the shake measuring unit is placed, a support for height adjustment of the shelf, and a position fixing handle for fixing the shelf to the support.

The shelf is moved along the guide groove formed in the support, and the shelf is fixed using the handle so that the height of the shelf is aligned with the measurement position of the screen module.

The apparatus further includes a measuring position guide unit for guiding a measuring position of the screen for measuring using the shake measuring unit.

The measurement position guide unit includes a laser pointer that emits a laser to indicate a mark corresponding to the measurement position on the outside of the screen module.

The measurement position guide portion includes a pointer holder for supporting the laser pointer.

The apparatus further includes a load adding device for applying a load to the screen module.

The load adding device includes a push pull gauge for advancing and retracting the piston to add and remove loads.

The arithmetic processing unit includes an AD converter for converting the displacement measured by the shake measuring unit into digital data, a shake variable calculating unit for calculating the shake variable from the converted measurement data, the calculated shake variable and a preset evaluation. And a determination unit for matching the data to determine whether the shaking is successful.

The apparatus may further include a signal analyzer configured to mount an analysis program for graphically processing the shake variable from the measured data.

The display unit further includes a display unit for displaying information on the determination result of the shake of the analysis result graphically processed by the signal analysis unit.

The shake variable calculation unit calculates the exhaustion time and the maximum displacement of the shake as the shake variable.

The determination unit uses evaluation coordinates, which are created in advance by at least two shaking variables, as evaluation data.

The determination unit sets a part of the evaluation coordinates as an effective area, and if the shake variable belongs to the valid area, determines that the shake characteristic is good.

The present invention for achieving the above object is a system for measuring the shaking of the video display device having a screen module and a support plate for supporting the screen module, comprising: a displacement measuring wire attached to the outside of the screen module; A displacement sensor for converting a change in the length of the wire corresponding to the shaking of the screen module into an electrical signal and outputting the electrical signal; An AD converter for converting the measurement signal output by the displacement sensor into digital data; A shake variable calculator configured to calculate a shake variable indicating a shake state of the screen module from the converted measurement data; A determination unit which matches the calculated shake parameter with preset evaluation data to determine whether the shake is unchanged; And a display unit for displaying the evaluation result.

It further includes a push-pull gauge for retracting the piston to add and remove the load to add a load to the display module.

The apparatus further includes a movable support plate which is movable in a state where each component of the measuring system is placed.

It further comprises a laser pointer for displaying a mark on the outside of the screen module to guide the measurement position of the displacement sensor.

The present invention for achieving the above object, in the method for measuring the shake of the video display device having a screen module and a support plate for supporting the screen module, using a displacement sensor to measure the measurement position Searching; Adding a load to the screen module; Removing the loading load; Measuring shaking of the screen module from which the load is removed using the displacement sensor; Calculating a shake parameter indicating a shake state of the screen module based on the measured output of the sensor; Determining the shaking characteristic of the screen module according to the calculated shaking parameter; And displaying the determination result.

The searching of the measurement position may include emitting a laser to display a mark corresponding to the measurement position on the outside of the screen module.

Searching the measurement position includes adjusting the height of the shelf on which the displacement sensor is placed, and attaching one end of the wire accommodated in the displacement sensor to the measurement position after completing the height adjustment of the shelf. do.

The step of adding a load to the display module is a step of advancing the piston of the push-pull gauge to add a load to the display module, wherein the added load is continued until the target value is set to the display module according to the appearance It includes.

The calculating of the shaking parameter may include converting the measurement signal into digital data, and calculating an exhaustion time and a maximum displacement of the shaking of the screen module from the measurement data.

The determining of the shake characteristic of the screen module may be performed according to whether the at least two shake variables are matched with preset evaluation coordinates and belong to an effective area of the evaluation coordinates.

And graphically processing the shake variable using the analysis program mounted from the measured data, and displaying the graphically analyzed analysis result.

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

As shown in FIG. 1, the external appearance of the video display device 1 has a structure in which the screen module 2 is supported on a support plate 3 placed on the lower side, so that the upper end of the screen module 2 is moved. It is desirable to make the degree a measure of shaking.

As shown in FIG. 2, the shake measuring system according to the present invention includes a shake measuring unit 10 and a shaking measuring unit 10 that convert and output a displacement to an electrical signal when the image display apparatus shakes. And an arithmetic processing unit 100 for evaluating and displaying the level of the shaking by inputting and analyzing the signal measured through the signal cable 11 and calculating a predetermined shaking parameter.

The operation processing apparatus 100 may be implemented by software installed in a computer or the like, or may be implemented through peripheral hardware including a computer.

The measurement result is displayed through the display unit 109 and the keyboard 11 included in the arithmetic processing apparatus 100, or the measurement command and input are set by the user.

In order to stably measure the shaking of the upper end of the screen module 2, the shaking measuring unit 10 and the measuring position guide unit 20 are provided on the shelf 32.

One side of the shelf 32 is installed in the guide groove 31 formed in the vertical direction of the support 30 to enable height adjustment, and to fix the height of the shelf 32 using the position fixing knob 33. It is. According to the rotation direction of the handle 33, the shelf 32 is in close contact with or loosen the support 30 can adjust the height of the shelf (32).

The moving support plate 40 includes a power supply device 50 for supplying power to the calculation processing apparatus 100 through the shake measuring unit 10, the processing processing apparatus 100, the support 30, and the power cable 51. ) Is provided.

The wheel 41 is installed at the bottom of the movable support plate 40 to move the measurement system, which is difficult to carry a large product to be measured and may be damaged during transportation. For sake.

Referring to FIG. 3, the shake measuring unit 10 accommodates a wire 14 whose length can be adjusted according to the displacement of the shake, and outputs an electrical signal corresponding to a change in the length of the wire 14. ) And a sensor holder 12 for fixing the displacement sensor 13.

At one end of the wire 14 is suspended a tip 15 for attaching to the measurement position of the display module 2. When the screen module 2 is shaken, the length of the wire 14 drawn out from the displacement sensor 13 and fixed to the screen module 2 by the tip 15 is changed.

In order for the displacement of the shake to be precisely represented by the change in the length of the wire 14, it is required not to be resisted by friction with the peripheral device when the length of the wire is increased and decreased.

In addition, since the measurement position of the screen module 2 to measure the shake is different according to the model of the product, when adjusting the height of the shelf 32 according to the measurement position, the position of the displacement sensor 13 is the screen module ( It becomes higher or lower than the height of 2), in this case the length of the wire in the displacement sensor 13 can not be stretched smoothly in the horizontal direction.

The measurement position guide unit 20 is for guiding an operation of aligning the height of the displacement sensor 13 in accordance with the measurement position of the screen module 2, and the laser pointer 21 and the laser pointer which emit the laser in a linear direction. A pointer holder 22 for supporting 21 is provided.

 The laser pointer 21 is fitted into a fixing groove formed at the upper end of the pointer holder 22 to be fixed. When the pointer switch 23 is operated, a laser beam is emitted from the laser pointer 21 in parallel with a wire drawn out from the displacement sensor 13, and a dot-shaped mark P for recognizing a position outside the screen module 2 is provided. Is displayed.

The tip 15 is attached by the operator with reference to the mark P displayed on the screen module 2. The screen module 2 is formed by the adhesive material 16 attached to one end of the tip 15 as shown in FIG. 4. Easily adhered to the outside of the). The adhesive material should be a member with adhesive force, but use a member with adhesive strength that can be reused, that is, after the measurement is completed, remove the tip and adhesive material together and use it again.

After attaching the tip 15 suspended on the wire 14 to the measurement position of the display module 2, the operator applies a load to the display module 2 using a push pull gauge. As shown in FIG. 5, the push pull gauge 60 is configured to include a piston 61 which is installed to be retractable, an operation switch 62 for operating the piston, and a load display portion 63 indicating a load. do. That is, when the forward command is input using the operation switch 62, the piston 61 moves forward in the forward direction A while being in close contact with the outside of the screen module 2, and the load is gradually increased. do. The increased load may be confirmed through the load display unit 63. When the increased load reaches a predetermined target value corresponding to the measurement object, the operator who confirms this inputs a retraction command using the operation switch 62. In response to this retraction command, the piston 61 in close contact with the outside of the screen module 2 suddenly retreats in the rearward direction B. As shown in FIG. Accordingly, the screen module 2 shakes forward and backward as the load applied is abruptly removed, and as the length of the wire 14 expands and contracts, the screen module 2 is converted into an electrical signal by the displacement sensor 13. To print.

The processing unit 100 receives the output of the displacement sensor 13 through the signal cable 11 to determine the level of shaking.

As shown in FIG. 6, the arithmetic processing unit 100 includes an AD converter 101, a signal analysis unit 103, a shake variable calculation unit 105, a determination unit 107, a display unit 109, and a keyboard 111. ).

The AD converter 101 converts an electric signal output from the displacement sensor 13 into digital data and outputs the digital data. The AD converter 101 is mounted as a PCI card in the processing unit.

The signal analysis unit 103 includes an analysis program for graphically implementing a pattern of shaking measured on the basis of the digitally converted measurement data provided from the AD converter 101, and the graphic analyzed using this analysis program. To be displayed through the display unit 109. In this case, the analysis program may be programmed and applied using Labview software. The measurement signal graphically processed by the analysis program is displayed via the display unit 109, an example of which is shown on the left side in FIG. 10.

As shown in FIG. 7, the shake variable calculation unit 105 calculates the maximum displacement having the maximum value of the exhaustion time from the shake occurrence until the shake is eliminated and the displacement of the shake during the shake.

The determination unit 107 matches the calculated shake parameter, that is, the exhaustion time and the maximum displacement of the shake obtained by the measurement with the previously prepared evaluation coordinates, and performs the determination of the shake of the product, and the information on the result of the determination of the shake. To be displayed through the display unit 109. Here, as shown in FIG. 8, the evaluation coordinate is determined to be good if the measured value m corresponding to the measured exhaust time and the maximum displacement belongs to the preset effective area G, and the measured value m corresponds to the effective area ( If it belongs to another area NG except for G), a defect is determined. In this case, the effective area G is limited to an area in which a dot pattern is excluded except for a part of a range that does not exceed the limit exhaust time T1 and does not exceed the limit maximum displacement D1. The setting of the effective area G is preferably set based on the evaluation of a plurality of users who use the product. The result of the positive determination using the evaluation coordinates and the measured exhaustion time and the maximum displacement value are displayed on the display unit 109, an example of which is shown on the right side of FIG. 10.

Hereinafter, a shake measurement method according to the present invention configured as described above will be described according to the accompanying drawings.

Referring to FIG. 9, the operator approximates the height of the shelf 32 on the top of the screen module 2 of the image display apparatus 1, which is the measurement target, and supports the shelf 32 by using the handle 33. ). Then, the operator operates the switch 23 to search for the measurement position by referring to the mark P displayed by the laser (201).

In view of the retrieved measurement position as shown in FIG. 3, the worker attaches the tip 15 of the wire 14 to the top of the screen module 2 of the video display device 1 (203).

Thereafter, the load is applied to the display module 2 by using the push-pull gauge 60. The amount of load to be added must be preset according to the product model, and the setting of the load size is performed by a large number of users who use the product. It is desirable to reflect the evaluation of (205).

When the load added to the screen module 2 is abruptly removed, the screen module 2 is shaken. The length of the wire 14 accommodated in the displacement sensor 13 changes according to the displacement of the shake, and the electrical signal is transmitted to the AD converter 101 of the processing unit 100 through the signal cable 11. Provide (207).

The AD converter 101 converts the provided measured electrical signal into digital data and provides the signal to the signal analyzer 103 (209).

The signal analysis unit 103 analyzes the converted measurement data using the on-board analysis program, and graphically processes the analysis result accordingly and displays the result on the display unit 109, and displays the measurement data in the shake variable calculation unit 105. Provided by (211).

The shake variable calculator 105 calculates the burnout time and the maximum displacement of the shake using the measured data, and provides the calculated burnout burnout time and the maximum displacement to the determination unit 107 (213).

The determination unit 107 matches the exhaustion time and the maximum displacement of the measured shaking provided from the shaking variable calculating unit 105 with a predetermined evaluation coordinate to perform the determination of the shaking of the product. At this time, if the measured value of the shaking time and the maximum displacement m correspond to the effective area G as shown in Fig. 8, a good judgment is made, otherwise a bad judgment is made (215).

The display unit 109 displays the evaluation result for the shaking level so that the operator can check (217).

As described above, according to the present invention, the shake of the screen module of the image display apparatus can be quantitatively measured using the shake measuring system, thereby improving the reliability of the shake measuring. In addition, the height adjustment function can be applied regardless of the appearance of the product model, so that the shake measurement system can be universally applied without being bound to a specific product model.

In addition, the measuring system can be placed on the base plate and moved, so it can be easily applied to shake measurement for large products that are difficult to carry.

Claims (30)

In the system for measuring the shake of the video display device having a display module and a support plate for supporting the display module, A shake measuring unit for measuring a displacement of a shake of the screen module when the screen module is shaken; And An image processing unit including a processing unit for acquiring a shaking parameter indicating a shaking state of the screen module based on the data measured by the shaking measuring unit, and determining a shaking characteristic of the image display apparatus according to the obtained shaking parameter System for measuring the shaking of the display device. The method of claim 1, And a moving support plate capable of moving in a state where the shake measuring unit and the arithmetic processing unit are placed on the shake display unit. The method of claim 2, System for measuring the shaking of the video display device for installing a wheel on the bottom of the movable support plate. The method of claim 1, The shake measuring unit includes a displacement measuring wire attached to an outer side of the screen module, and a displacement sensor for receiving the wire and converting a length change of the wire into an electrical signal and outputting the shake measurement unit. system. The method of claim 4, wherein The shake measuring unit further comprises a tip suspended from one end of the wire for measuring displacement, and a sensor holder for supporting the displacement sensor. The method of claim 5, And the tip is used to measure the shaking of the video display device attached using an adhesive material. The method of claim 1, The measuring system further comprises a shelf on which the shake measuring unit is placed, a support for adjusting the height of the shelf, and a position fixing handle for fixing the shelf to the support. The method of claim 7, wherein Moving the shelf along a guide groove formed in the support, and measuring the shaking of the image display device using the handle to fix the shelf so that the height of the shelf is aligned with the measurement position of the screen module. The method of claim 1, And a measurement position guide unit for guiding a measurement position of the screen for measurement using the shake measurement unit. The method of claim 9, The measuring position guide unit is a system for measuring the shaking of the image display device including a laser pointer for emitting a laser for indicating a mark corresponding to the measuring position on the outside of the screen module. The method of claim 10, And the measuring position guide portion comprises a pointer holder for supporting the laser pointer. The method of claim 1, And a load adding device for applying a load to the screen module. The method of claim 12, The load adding device includes a push pull gauge for advancing and retracting the piston to add and remove loads. The method of claim 1, The arithmetic processing unit includes an AD converter for converting the displacement measured by the shake measuring unit into digital data, a shake variable calculating unit for calculating the shake variable from the converted measurement data, the calculated shake variable and a preset evaluation. And a determination unit for matching the data to determine whether the shake is successful. The method of claim 14, And a signal analyzer configured to mount an analysis program for graphically processing the shake variable from the measured data. The method of claim 15, And a display unit for displaying the information on the determination result of the shake on the analysis result graphically processed by the signal analyzer. 15. The system of claim 14, wherein the shake variable calculator calculates burnout time and maximum displacement of the shake as a variable of the shake. The method of claim 14, And the determining unit measures the shaking of the video display device using the evaluation coordinates previously prepared by the at least two shaking variables as the evaluation data. The method of claim 18, And the determining unit sets a part of the evaluation coordinates as an effective area, and if the shake variable belongs to the valid area, determine that the shake characteristic is good for the shake characteristic. In the system for measuring the shake of the video display device having a display module and a support plate for supporting the display module, A displacement measuring wire attached to an outside of the screen module; A displacement sensor for converting a change in the length of the wire corresponding to the shaking of the screen module into an electrical signal and outputting the electrical signal; An AD converter for converting the measurement signal output by the displacement sensor into digital data; A shake variable calculator configured to calculate a shake variable indicating a shake state of the screen module from the converted measurement data; A determination unit which matches the calculated shake parameter with preset evaluation data to determine whether the shake is unchanged; And And a display unit for displaying the evaluation result. The method of claim 20, And a push-pull gauge that retracts and adds and removes a piston to apply a load to the display module. The method of claim 20, And a moving support plate which is movable with the respective components of the measuring system placed on top of each other. The method of claim 20, And a laser pointer for indicating a mark on the outside of the screen module to guide the measurement position of the displacement sensor. In the method for measuring the shaking of the video display device having a screen module and a support plate for supporting the screen module, Retrieving a measurement position for measuring the shake using the displacement sensor; Adding a load to the screen module; Removing the loading load; Measuring shaking of the screen module from which the load is removed using the displacement sensor; Calculating a shake parameter indicating a shake state of the screen module based on the measured output of the sensor; Determining the shaking characteristic of the screen module according to the calculated shaking parameter; And Displaying the determination result; measuring a shake of the video display device. The method of claim 24, The retrieving of the measurement position may include: emitting a laser to display a mark corresponding to the measurement position on the outside of the screen module. The method of claim 24, Searching the measurement position includes adjusting the height of the shelf on which the displacement sensor is placed, and attaching one end of the wire accommodated in the displacement sensor to the measurement position after completing the height adjustment of the shelf. Method for measuring the shaking of the video display device. The method of claim 24, The step of adding a load to the display module is a step of advancing the piston of the push-pull gauge to add a load to the display module, wherein the added load is continued until the target value is set to the display module according to the appearance Method for measuring the shaking of the video display device comprising a. The method of claim 24, The calculating of the shaking variable may include converting the measurement signal into digital data, and calculating an exhaustion time and a maximum displacement of the shaking of the screen module from the measuring data. One way. The method of claim 24, The determining of the shaking characteristic of the screen module And matching the at least two shake variables with preset evaluation coordinates to determine whether the shake variable belongs to an effective area of the evaluation coordinates. The method of claim 28, And graphically processing the shake variable using the analysis program loaded from the measured data, and displaying the analyzed result of the graphic processing.

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