KR950004380B1 - Automatic testing device of lcd - Google Patents

Abstract

To improve the quality control and to reduce the inspection time, an automatic system examines the quality of liquid crystal displays during manufacturing by a CCD camera and vision system. This system consists of a vision system including a CCD camera, a LCD operating system, the first motor and its driving system to load the LCD displays to fix to the table, the second motor and its driving system to control the focus of the CCD camera, a sensor system to estimate whether the LCD is fixed or loaded, and a micro processor to control the above systems.

Description

Liquid crystal display automatic inspection device

1 is a device diagram of the present invention.

2 (a) to (d) are flowcharts of the present invention.

* Explanation of symbols for the main parts of the drawings

10: CCD camera 20: Vision system part

30: LCD driver 3l: water receiver

32: LCD 40: first motor drive unit

41: first motor unit 50: second motor drive unit

60: sensor unit 61: hand-to-body sensor

62: load sensor 70: key input unit

80: display unit 90: microcomputer unit

M1: Loading Motor M2: Fixed Motor

M3: Sort Motor M4: Outline Focusing Motor

The present invention relates to an automatic liquid crystal display (LCD) automatic inspection apparatus which can automatically check whether a liquid crystal display (Liquid Crystal Dlsplay; LCD) is defective using a CCD (Charge Coupled Device) camera and a vision system. .

In general, the LCD has been produced and the human body has been visually inspected for normal operation by connecting the LCD driver or the microcomputer port through a separate jig. Therefore, the working time between skilled and non-skilled person is different, so the tester is required to master, and even a skilled person has a disadvantage such as an error in weighted seeker test when the long-term test is performed.

The present invention is to solve this problem by using the CCD camera and vision system exemplified in the applicant's patent application Nos. 92-10422 and 92-11644 used in the automatic inspection of the monitor, etc., the motor to suit the inspection of the LCD It is equipped with a driving part and a sensor part to automate the inspection of the LCD so that the production process can be performed in-line. That is, the vision system part which inspects vision data by a CCD camera, LCD driver for driving the LCD placed, a first motor driver for selecting and driving the first motor part for loading and fixing the LCD, a second motor driver for driving a coarse focusing motor of the CCD camera, and an LCD fixed to the receiver Control the LCD driver, the first motor driver and the second motor driver according to the sensor system for determining whether the controller is being loaded or loaded, the vision system unit, the key input unit, the display operation, and the input of the sensor unit. It will be constructed as part microcomputer.

When described in detail with reference to the drawings as follows.

The present invention includes a vision system unit 20 for inspecting vision data by the CCD camera 10; An LCD driver 30 for driving the LCD 32 placed on the male portion 31; A first motor driver 40 for selectively driving the first motor part 41 for loading and fixing the LCD 32; A second motor driver 50 for driving the roughly focusing motor M4 of the CCD camera 10; A sensor unit 60 for determining whether the LCD 32 is being fixed or loaded to the water receiver 31; The LCD driver 30 according to the operation of the vision system 1 unit 20 and the key input unit 70, the display unit 80, and the input of the sensor unit 60; The microcomputer unit 90 controls the first and second motor driving units 40 and 50.

The sensor unit 60 detects whether the LCD unit 32 is fixed to the receiver unit 31 and detects whether the LCD 32 is loading or ejecting. It comprises a load sensor 62. The first motor unit 41 includes a sort motor NI3 for separating the defective LCD 32; A loading motor Ml for driving the loading and ejecting of the LCD 32 and a fixed motor M2 for driving the fixed (Open / C1ose) operation of the LCD 32.

The operation of the present invention configured as described above will be described with the flowchart of FIG.

First, the LCD 32 is placed on the receiver 31 and power is applied. In this state, as shown in FIG. 2A, the microcomputer unit 90 checks whether the current mode is automotor, whether the inspection standard LCD data has been input, or the state of the receiver unit sensor 61 in the receiver unit 31 in order. (A1 simple). That is, the microcomputer unit 90 checks whether there is an auto mode input through the key input unit 70, and then checks whether reference data according to the LCD 32 specification is input from the key input unit 70, The sensor 61 checks to see if the LCD 32 is fixed to the water receiver 31.

In the microcomputer unit 90, the microcomputer unit 90 determines whether the LCD 32 is fixed (step Al-1). If it is determined in the above step (Al-1 step) that the LCD 32 is fixed to the receiver 31, the microcomputer unit 90 drives the rough focusing motor M4 through the second motor driver 50 to generate a vision. It is possible to save time of LCD 32 inspection by making rough focusing before the system unit 20 performs focusing (step A2).

If the current mode is not the haute mode or there is no reference LCD data input in step A1, the microcomputer unit 90 indicates that the display unit 80 is in manual mode (step A1-2). As shown in (b), the vision system unit 20 checks whether the focal point is corrected by making the CCD camber 10 achieve precise focusing, and reads the LCD 32 from the CCD camera 10. The display state of the data is processed by 2 bits, and the data is transmitted to the my inspection unit 90 (step A3).

In this case, the microcomputer unit 90 drives the LCD 32 to control the LCD driving unit 30 in advance when the vision system unit 20 is operated, thereby operating the vision system unit through the CCD camera 10. In 20, inspection can be performed, and inspection data from the vision system unit 20 is transmitted. If the focus of the CCD camera 10 is not corrected in the step A3, the step A2 is performed again. Subsequently, the microcomputer unit 90 determines whether there is an abnormality of the LCD 32 based on the received data (step A4). In this case, when the LCD 32 is determined to be in a normal state, the microcomputer unit 90 first motor driver 40. To rotate the fixed motor (M2) to release the fixed state (step A4), and then also rotate the loading motor (Ml) to reverse the LCD 32 to a later process step (Ejecting), and the new LCD ( 32) is loaded on the water bag 31 by forward rotation of the loading mode Ml.

At this time, the load sensor 62 detects whether the LCD 32 is being loaded or is being discharged, and the microcomputer unit 90 judges that the loading is completed. When the loading is completed, the load sensor 62 returns to the above step (Al-1 step) to repeat the process. Step A6) If the LCD 32 falls short of the inspection criteria in the step A4, the microcomputer unit 90 rotates the fixed motor M2 by rotating the fixed motor M2 by driving the first motor driver 40. The state is released (step A5-1), and then the sort motor (M3) is driven to a separate defective LCD storage and then the step (Al-1) is performed to repeat the inspection of the LCD 32 ( Step A5-2).

On the other hand, when it is determined that the LCD 32 is not fixed in the step A1-1 as shown in FIG. 2C, the microcomputer unit 90 checks the load sensor 10 and the LCD 32 If it is determined that the LCD 32 is loaded (step A1-11) by detecting whether it is being loaded or not, the loading motor M1 is driven to allow the LCD unit 32 to display the LCD unit 32. Check whether it is fixed in step 2), and perform the step (step Al-1) (step Al-12).

If it is determined in step (Al-11) that the LCD 32 is not loaded, the microcomputer unit 90 causes the display unit 80 to display no LCD 32 (LCD BLANK) and stops the inspection operation. (Steps A1-l3). At this time, the microcomputer unit 90 performs a key read operation from the key input unit 70 and detects whether there is a separate key input (step Al-14). Perform step (A1) from the beginning (step Al-15). On the contrary, if the manual mode is input, the above step (Al-2 step) is performed (Al-16 step). If the manual mode input is not input in the above step (step A1-16) and the key input is stopped, the operation is regarded as finished and the power is cut off and the job is terminated (steps A1-17).

If the manual mode is displayed in step A1-2, as shown in FIG. 2D, the microcomputer unit 90 performs a key read operation from the key input unit 70 to display the LCD. It is determined whether the inspection standard data according to the specification in (32) is input (step Al-21). If there is no input of the reference data in the above step (A1-2l), the microcomputer unit 90 checks whether the sorting motor (M3) driving instruction has been entered (steps A1-22), and contains the sorting motor (M3) driving instruction. If the motor is driven, the motor (S3) is driven and then the above steps (steps A1-21) are performed (steps A-221), and if it is determined that the sort motor (M3) driving instruction is not entered, the loading motor (Ml) driving instruction key It is determined whether the operation (Al-23). At this time, if it is determined that there is a driving motor Ml driving instruction, the microcomputer unit 90 drives the loading motor Ml through the first motor driving unit 40 to perform the above step (Al-21 step) (A1). -231 step).

If there is a reference data input in the above steps (A1-21), the vision system data is transmitted (steps A1-211), the data is stored in the microcomputer unit 90 and the steps (steps A1-21) are performed. (Step Al-212). On the other hand, if there is no loading motor (Ml) driving stop input in the step (Al-23 step), it is determined whether the input of the fixed motor (M2) drive stop input (step Al-24), the fixed motor (M2) drive When the input is received, the fixed motor (M2) is driven to perform the above steps (A1-21). On the contrary, if the fixed motor (M2) drive stop input is not input, it is determined whether the input of the rough focusing motor (M4) drive stop input is input (step Al-25), and if the input of the rough focusing motor (M4) drive stop input is received. The microcomputer unit 90 drives the rough focusing motor M4 through the second motor driving unit 50 to perform the step (Al-21 step) (step Al-251). On the contrary, if the rough focusing motor key input is not input, it is determined whether the auto mode key input is input, and if the auto mode key input is input, the above steps (step A1) are performed from the beginning (steps A1-26).

On the contrary, if the auto mode key input has not been entered, it is determined whether the manual mode key input has been entered. If not, perform the above step (Al-21 step). The key read in the step (Al-21) is performed in parallel with the operation performed according to the key read in the step (A1-14). Manual mode can be changed, and each operation is performed by checking by the sensor unit 60 so that no error occurs and can automatically check the LCD.

As described above, the present invention uses a CCD camera and a vision system unit to load and drive the LCD to several units so that the output state is inspected using a CCD camera, and the LCD is loaded by the first motor unit and the roughly focusing motor. Ejected and fixed, the sensor unit can be automated by eliminating its operational errors, thereby reducing the uniform inspection quality and inspection time.

Claims (3)

Loading and fixing the vision system unit 20 for inspecting the vision data by the CCD camera 10, the LCD driving unit 30 for driving the LCD 32 placed on the water unit 31, and the LCD 32 A first motor driving part 40 for selectively driving the first motor part 41, a second motor driving part 50 for driving a roughly focusing motor M4 of the CCD camera 10, and the above-described large part 3l. The sensor unit 60 for determining whether the LCD 32 is being fixed or being loaded, the operation of the vision system unit 20, the key input unit 70, the display unit 80, and the input of the sensor unit 60. Liquid crystal display (LCD) automatic inspection device, characterized in that the LCD driver 30, the microcomputer unit 90 for controlling the first and second motor driver (40, 50) automatically determine whether the LCD is defective. . 2. The sensor unit 60 according to claim 1, wherein the sensor unit 60 includes a water unit sensor 61 for detecting whether the LCD 32 is fixed to the water unit 31, and ejecting whether the LCD 32 is being loaded. Liquid crystal display (LCD) automatic inspection device, characterized in that comprises a load sensor (62) for detecting whether. The method of claim 1, wherein the first motor unit 41 is a sort motor (.M3) for separating the defective LCD 32, a loading motor (Ml) for driving the loading and ejecting of the LCD 32, Liquid crystal display (LCD) automatic inspection device comprising a fixed motor (M2) for driving the fixed (Open / C1ose) operation of the LCD (32).