KR0159681B1 - Flicker auto control and checking system for tft-lcd module - Google Patents

Abstract

The present invention automatically adjusts the adjustment point of the TFT-LCD module to match the screen flicker of the TFT-LCD module, and automatically adjusts / inspects the flicker of the TFT-LCD module which automatically determines the pass / fail of the TFT-LCD module. A device and a method thereof, which automatically adjust the screen flicker of the TFT-LCD module by using the screen flicker measurement value of the TFT-LCD module, and automatically determine the pass / fail of the TFT-LCD module. By eliminating the judgment of the inspector, the reliability of the inspection is improved, and the optimal flicker adjustment can be performed.

Description

Automatic flicker / inspection apparatus for TFT-LCD module and its method

1 is a block diagram of a manual flicker adjustment / inspection apparatus of a TFT-LCD module according to the prior art.

2 is a block diagram of a flicker automatic adjustment / inspection apparatus of a TFT-LCD module according to the present invention.

3 is a block diagram showing the configuration of the automatic flicker adjustment / inspection apparatus of the TFT-LCD module according to the present invention.

4 is a flowchart showing one embodiment of an automatic flicker adjustment / inspection method of a TFT-LCD module according to the present invention.

5 is a flowchart showing still another embodiment of the automatic flicker adjustment / inspection method of the TFT-LCD module according to the present invention.

* Explanation of symbols for the main parts of the drawings

1: microcomputer 2: TFT-LCD module for A / V

3: pallet 4: screwdriver for adjustment

6: pattern generator 7: A / V image processor

9: illuminometer 10: A / D board

13, 14: X, Y side motor driver 15: CCD camera

Vcom: Adjustment Point

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flicker adjustment / inspection apparatus for a TFT-LCD module and a method thereof, and in particular, to automatically adjust an adjustment point of a TFT-LCD module to match the screen flicker of the TFT-LCD module, and automatically to the TFT-LCD A flicker automatic adjustment / inspection apparatus for a TFT-LCD module for determining the pass / fail of a module and a method thereof.

The flicker manual adjustment / inspection apparatus of the conventional TFT-LCD module includes a module fixing jig 51 in which the TFT-LCD module 50 is seated, and the module fixing jig 51 as shown in FIG. The illuminometer 52 for measuring the flicker of the screen 50a of the TFT-LCD module 50 seated on the panel, the illuminometer support 53 for supporting the illuminometer 52, and the illuminometer 52 measured by the illuminometer 52. TFT type R, G, and B signals using an oil scope 54 that displays flicker measurements as a waveform, a pattern generator 55 that generates a standard image pattern, and a standard image pattern generated by the pattern generator 55 The A / V video interface unit 57 is converted to the TFT-LCD module 50 through the flat cable 56.

The TFT-LCD module 50 also includes an adjustment point Vcom for flicker adjustment of the screen 50a.

The operation method of the manual flicker adjustment / inspection apparatus of the TFT-LCD module according to the related art configured as described above is as follows.

First, the inspector connects the flat cable 56 with the TFT-LCD module 50 to display a standard image pattern on the screen 50a of the TFT-LCD module 50, and then operates the pattern generator 55. A standard image pattern is displayed on the screen 50a of the TFT-LCD module 50.

After that, when the inspector operates the illuminometer 52 and the oscilloscope 54, the illuminometer 52 measures the flicker of the screen 50a of the TFT-LCD module 50 and outputs the measured value to the oscilloscope 54. In addition, the oscilloscope 54 displays the input flicker measurement value as a waveform.

In the above, when the waveform is displayed on the oscilloscope 54, the inspector observes the waveform while turning the adjustment point Vcom with the adjusting driver and the screen of the TFT-LCD module 50 is within a range where the amplitude of the waveform is minimum. (50a) If the flicker is not adjusted normally even after the flicker adjustment is completed and the adjustment point Vcom is turned one cycle, the TFT-LCD module 50 is determined to fail.

As described above, however, the inspector directly monitors the screen flicker adjustment and inspection of the TFT-LCD module by manually adjusting the adjustment point while observing the waveform displayed on the oscilloscope. Relying on the judgment, the reliability of the test is poor, it is difficult to meet the tact time (tact time) is not an experienced inspector.

The present invention has been made to solve the above problems, by automatically adjusting the adjustment point by using the screen flicker measurement value of the TFT-LCD module, the inspection by automatically determining the pass / fail of the TFT-LCD module SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic flicker adjustment / inspection apparatus and method for a TFT-LCD module that improves the reliability of the TFT-LCD module and enables optimum flicker adjustment.

Automatic flicker adjustment / inspection device of the TFT-LCD module according to the present invention for achieving the above object is a microcomputer; A module transfer unit controlled by the microcomputer to transfer the TFT-LCD module to an inspection position; An image pattern supply unit controlled by the microcomputer to supply an image pattern to the TFT-LCD module; A flicker measurement unit which measures a screen flicker of the TFT-LCD module and then outputs the measured value to the microcomputer; A flicker adjustment unit for adjusting an adjustment point for adjusting the screen flicker of the TFT-LCD module; An axis drive unit controlled by the microcomputer to move the flicker adjustment unit left, right, and forward and backward; And a screen photographing unit which photographs the screen of the TFT-LCD module and then outputs the video signal to the microcomputer.

In addition, the automatic flicker adjustment / inspection method of the TFT-LCD module according to the present invention includes a first process of loading the TFT-LCD module to an audit position; A second process of aligning the TFT-LCD module; Measuring a screen flicker of the TFT-LCD module; A fourth step of adjusting the adjustment point included in the TFT-LCD module by using the screen flicker measurement value of the TFT-LCD module and determining the pass / fail of the TFT-LCD module; And a fifth process of unloading the TFT-LCD module.

Hereinafter, with reference to the accompanying drawings an embodiment of the automatic flicker automatic adjustment / inspection apparatus and method of the TFT-LCD module according to the present invention will be described in detail.

The automatic flicker adjustment / inspection apparatus of the TFT-LCD module according to the present invention includes a microcomputer 1 as shown in FIGS. 2 and 3; A module transfer part controlled by the microcomputer 1 to transfer the TFT-LCD module 2 to the inspection position; An image pattern supply unit controlled by the microcomputer 1 to supply an image pattern to the TFT-LCD module 2; A flicker measurement unit which measures flicker of the screen 2a of the TFT-LCD module 2 and then outputs the measured value to the microcomputer 1; A flicker adjustment unit for adjusting an adjustment point Vcom for flicker adjustment of the screen 2a of the TFT-LCD module 2; An axis drive unit controlled by the microcomputer (1) to move the flicker adjustment unit left, right and before and after; And a screen photographing unit which photographs the screen 2a of the TFT-LCD module 2 and then outputs the video signal to the microcomputer 1.

In the above, the module conveying part is a pallet 3 and the flicker adjusting part is an adjusting driver 4.

The image pattern supply unit is controlled by the microcomputer 1 to supply a video pattern to an OA TFT-LCD module (not shown), and a pattern generator for generating an A / V standard video pattern. 6) and A / V for converting A / V standard image patterns generated by the pattern generator 6 into TFT type R, G, B signals and outputting them to the A / V TFT-LCD module 2 It consists of an image processor 7 and a GPIB board 8 for communication between the pattern generator 6 and the microcomputer 1.

The flicker measuring unit measures the flicker of the screen 2a of the TFT-LCD module 2 and then outputs the measured value, and digitizes the measured value output from the illuminometer 9 to the microcomputer 1. It consists of the A / D board 10 to output.

The shaft drive part includes an X-axis motor (not shown) for moving the adjusting driver 4 to the left and right, that is, the X side 11, and the front and rear of the adjusting driver 4, that is, the Y side 12. Y-axis motor (not shown) to move on the ()) and X, Y-axis motor drivers (13, 14) controlled by the microcomputer (1) to drive the X, Y-axis motor, respectively.

The screen photographing unit photographs the screen 2a of the TFT-LCD module 2 and outputs an image signal to the microcomputer 1 by processing the image signal output from the CCD camera 15. And an image processing board 16 for outputting.

One embodiment of the automatic flicker adjustment / inspection method using the automatic flicker adjustment / inspection apparatus of the TFT-LCD module according to the present invention configured as described above is as follows.

As shown in FIG. 4, when the pallet 3 first moves to the right in the drawing and the A / V TFT-LCD module 2 seated on the pallet 3 is loaded to the inspection position, the microcomputer 1 The pattern generator 6 is controlled through the GPIB board 8 to display a standard image pattern on the A / V TFT-LCD module 2, and the screen of the A / V TFT-LCD module 2 2a) When the standard image pattern is displayed, the CCD camera 15 controlled by the microcomputer 1 moves to the measurement coordinate value to accurately align the A / V TFT-LCD module 2 and the A / V When the TFT-LCD module 2 is correctly aligned, the illuminometer 9 controlled by the microcomputer 1 measures the flicker of the screen 2a of the TFT-LCD module 2 for A / V. (1st, 2nd, 3rd course)

Then, the flicker measurement value of the screen 2a of the A / V TFT-LCD module 2 measured by the illuminometer 9 is digitized by the A / D board 10 and input to the microcomputer 1. The microcomputer 1 determines whether the flicker measurement value is within a preset reference value range. (Step 1)

In the first step, the microcomputer 1 determines the A / V TFT-LCD module 2 as the pass when the flicker measurement value is within the reference value range, and when the flicker measurement value is outside the reference value range, the X and Y axis motors. Control the drivers 13 and 14 to operate the adjustment driver 4 to adjust the adjustment point Vcom included in the A / V TFT-LCD module 2 by a preset offset amount, and then adjust the adjustment point ( It is determined whether the adjustment amount of Vcom) exceeds one cycle. (Steps 2 and 3)

In the third step, the microcomputer 1 determines that the A / V TFT-LCD module 2 fails if the adjustment amount of the adjustment point Vcom exceeds one cycle, and the adjustment amount of the adjustment point Vcom is 1. If the cycle has not been exceeded, the flicker of the screen 2a of the A / V TFT-LCD module 2 adjusted in the third step is measured and then repeated from the first step. (Completed Steps 4, 5 and 4)

After that, when the pallet 3 moves to the left in the drawing and the A / V TFT-LCD module 2 for which the pass / fail determination is completed is unloaded, the flicker adjustment of the A / V TFT-LCD module 2 is performed. And inspection is complete. (5th course)

Another embodiment of the automatic flicker adjustment / inspection method of the TFT-LCD module according to the present invention is as follows.

As shown in FIG. 5, when the pallet 3 first moves to the right in the drawing and the A / V TFT-LCD module 2 seated on the pallet 3 is loaded to the inspection position, the microcomputer 1 The pattern generator 6 is controlled through the GPIB board 8 to display a standard image pattern on the A / V TFT-LCD module 2, and the screen of the A / V TFT-LCD module 2 When the standard image pattern is displayed in 2a), the CCD camera 15 controlled by the microcomputer 1 moves to the measurement coordinate value to accurately align the A / V TFT-LCD module 2 and the A / V. When the TFT-LCD module 2 is correctly aligned, the illuminometer 9 controlled by the microcomputer 1 measures the flicker of the screen 2a of the A / V TFT-LCD module 2. (1st, 2nd, 3rd course)

Then, the flicker measurement value of the screen 2a of the A / V TFT-LCD module 2 measured by the illuminometer 9 is digitized by the A / D board 10 and input to the microcomputer 1. The microcomputer 1 stores the flicker measurement value and then controls the X and Y axis motor drivers 13 and 14 to operate the adjustment driver 4 to adjust the adjustment point Vcom by a preset offset amount. The illuminometer 9 is again controlled to read flicker measurement values of the screen 2a of the A / V TFT-LCD module 2 from the A / D board 10, and then stored with the current flicker measurement values. Determine if the previous flicker measurement is the smallest peak area that increases with the decrease.

In the same manner as described above, the microcomputer 1 operates the adjustment driver 4 to adjust the adjustment point Vcom by a preset offset amount, and any N-th flicker measurement value inputted through the A / D board 10 may be used. By comparing the N-1 th flicker measurement, one peak value is determined as the minimum value by finding the minimum peak area where the flicker measurement increases from decrease during one cycle of the adjustment point Vcom. (Step 1)

When the minimum value is determined in the first step, the microcomputer 1 determines whether the determined minimum value is within a preset reference value range. If the minimum value is within the reference value range, the microcomputer 1 determines that the A / V TFT-LCD module 2 passes. If it is outside the reference value range, the A / V TFT-LCD module 2 is determined to fail. (Complete steps 2, 3 and 4)

After that, when the pallet 3 moves to the left in the drawing and the A / V TFT-LCD module 2 for which the pass / fail determination is completed is unloaded, the flicker adjustment of the A / V TFT-LCD module 2 is performed. And inspection is complete. (5th course)

As described above, the apparatus for automatically adjusting / checking the flicker of the TFT-LCD module and the method thereof automatically adjust the screen flicker of the TFT-LCD module using the screen flicker measurement value of the TFT-LCD module, and automatically Since the pass / fail of the TFT-LCD module is determined, the judgment of the inspector is eliminated, so that the reliability of the inspection can be improved and the optimum flicker adjustment can be performed.

Claims (8)

A microcomputer; A module transfer unit controlled by the microcomputer to transfer the TFT-LCD module to an inspection position; An image pattern supply unit controlled by the microcomputer to supply an image pattern to the TFT-LCD module; A flicker measurement unit which measures a screen flicker of the TFT-LCD module and then outputs the measured value to the microcomputer; A flicker adjustment unit for adjusting an adjustment point for adjusting the screen flicker of the TFT-LCD module; An axis drive unit controlled by the microcomputer to move the flicker adjustment unit left, right, and forward and backward; And a screen photographing unit which photographs the screen of the TFT-LCD module and then outputs the video signal to the microcomputer. The apparatus of claim 1, wherein the image pattern supply unit is controlled by the microcomputer to supply an image pattern to an OA TFT-LCD module, a pattern generator for generating an A / V standard image pattern, and the pattern generator. The A / V image processor converts the A / V standard image pattern generated from the TFT type R, G, and B signals to the A / V TFT-LCD module, and communicates between the pattern generator and the microcomputer. Flicker automatic adjustment / inspection device of the TFT-LCD module, characterized in that consisting of a GPIB board for. The A / D board according to claim 1, wherein the flicker measuring unit measures a screen flicker of the TFT-LCD module and then outputs the measured value, and an A / D board for digitizing the measured value output from the illuminometer and outputting the measured value to the microcomputer. Flicker automatic adjustment / inspection device of the TFT-LCD module, characterized in that consisting of. The X- and Y-axis motors of claim 1, wherein the shaft drive unit comprises an X-axis motor for moving the flicker adjustment unit left and right, a Y-axis motor for moving the flicker adjustment unit forward and backward, and controlled by the microcomputer. Flicker automatic adjustment / inspection device of the TFT-LCD module, characterized in that consisting of X, Y axis motor driver for driving each. The board of claim 1, wherein the screen photographing unit is a CCD camera for capturing a screen of the TFT-LCD module and outputs an image signal, and an image processing board for processing and outputting the image signal output from the CCD camera to the microcomputer. Flicker automatic adjustment / inspection device of the TFT-LCD module, characterized in that configured. A first step of loading the TFT-LCD module to the inspection position; A second process of aligning the TFT-LCD module; Measuring a screen flicker of the TFT-LCD module; A fourth step of adjusting an adjustment point included in the TFT-LCD module by using the screen flicker measurement value of the TFT-LCD module, and determining the pass / fail of the TFT-LCD module; And a fifth process of unloading the TFT-LCD module. 7. The method of claim 6, wherein the fourth process comprises: a first step of determining whether a screen flicker measurement value of the TFT-LCD module is within a preset reference value range; A second step of judging the TFT-LCD module as a pass if the flicker measurement value is within the reference value range in the first step; A third step of adjusting the adjustment point of the TFT-LCD module by a preset offset amount if the flicker measurement value is outside the reference value range in the first step, and then determining whether the adjustment amount of the adjustment point exceeds one cycle; A fourth step of determining that the TFT-LCD module fails if the adjustment amount of the adjustment point exceeds one cycle in the third step; In the third step, if the adjustment amount of the adjustment point does not exceed one cycle, a fifth step of measuring the screen flicker of the TFT-LCD module adjusted in the third step and then repeatedly executing the first step is performed. Flicker automatic adjustment / inspection device of the TFT-LCD module. 7. The method of claim 6, wherein the fourth process compares an arbitrary N-th flicker measurement value with an N-1 th-flicker measurement value by adjusting an adjustment point of the TFT-LCD module by a preset offset amount, thereby determining 1 of the adjustment point. Finding a minimum peak area where the flicker measurement increases at a decrease during the cycle and determining the peak value as the minimum value; A second step of determining whether the minimum value determined in the first step is within a preset reference value range; And a third step of determining that the TFT-LCD module passes if the minimum value is within the reference value range in the second step, and rejecting the TFT-LCD module if the minimum value is outside the reference value range. Automatic flicker / check method of LCD module.