WO2015024340A1

WO2015024340A1 - Detection apparatus, one drop filling system, and one drop filling control method

Info

Publication number: WO2015024340A1
Application number: PCT/CN2013/089493
Authority: WO
Inventors: 井杨坤
Original assignee: 合肥京东方光电科技有限公司; 京东方科技集团股份有限公司
Priority date: 2013-08-22
Filing date: 2013-12-16
Publication date: 2015-02-26
Also published as: CN103454790B; CN103454790A

Abstract

Provided are a detection apparatus (10), a one drop filling system, and a one drop filling control method. The one drop filling system comprises a dripping machine (01) and a drop detection device (02). The dripping machine (01) drips liquid crystal between an array substrate (40) and a color film substrate (41) which form a cell; and the drop detection device (02) detects the amount of the liquid crystal injected between the array substrate (40) and the color film substrate (41), so that a liquid crystal drop is adjusted according to the amount of the injected liquid crystal.

Description

Detection device, liquid crystal dropping system and liquid crystal dropping control method

Technical field

The present invention relates to the field of manufacturing liquid crystal panels, and in particular to a detecting device, a liquid crystal dropping system and a liquid crystal dropping control method. Background technique

A Thin Film Transistor Liquid Crystal Display (TFT-LCD) includes an array substrate and a color filter substrate. Using liquid crystal drip (One

The Drop Fi l l ing, 0DF) method fills a liquid crystal between an array substrate and a color filter substrate to fabricate a liquid crystal panel.

In the manufacturing process of the existing liquid crystal panel, it is necessary to determine the amount of liquid crystal filled between the array substrate and the color filter substrate in accordance with design requirements and fine adjustments in the actual process. During the processing, there are upper and lower limits for the filling amount of the liquid crystal, and the center values of the upper and lower limits are the standard filling values.

When the filling amount of the liquid crystal approaches or falls below the lower limit of the filling amount, the amount of liquid crystal between the substrates is small, and the supporting effect of the liquid crystal on the substrate is reduced, so that the array substrate and the color filter substrate are used for supporting purposes. The support force of the Photo Spacer (PS) increases, resulting in a larger amount of compression. In this case, if the panel is tapped or tapped by an external force, it will cause the position of the PS to shift. In addition, due to the large force of the PS, the resistance of the PS is increased at the same time, which causes the PS to fail to return to the original position quickly and effectively, eventually resulting in light leakage and white light.

On the other hand, when the filling amount of the liquid crystal approaches or is slightly higher than the upper limit of the filling amount, the supporting effect of the liquid crystal on the substrate is relatively large, so that the supporting force of the PS is reduced, the amount of compression becomes small, and thus the PS The resistance to recovery is reduced. However, in this case, when the liquid crystal panel is left for a while, due to the gravity factor of the liquid crystal itself and the flow of the liquid crystal, a state in which a liquid crystal is excessive in a partial region occurs, thereby causing a problem of a so-called gravity mark (Mura).

Whether it is light leakage or gravity marks, it will seriously affect the display device. Show the effect. Therefore, it is necessary to detect the amount of liquid crystal and to finely control the amount of liquid crystal filling so as to control the filling amount of the liquid crystal within an allowable range, thereby avoiding the occurrence of various undesirable phenomena.

The existing control method for the liquid crystal filling amount is a manual adjustment method or a liquid crystal dropping experiment for liquid crystal amount, and then the experimental results are applied to production processing. Therefore, it will consume a lot of manpower and material resources, reduce the production efficiency of the production line, and increase the production cost. Summary of the invention

Embodiments of the present invention provide a detecting device, a liquid crystal dropping system, and a liquid crystal dropping control method, which can realize real-time detection and drip control of liquid crystal filling amount, thereby improving product quality, production efficiency, and production cost.

In order to achieve the above object, an embodiment of the present invention adopts the following technical solution: According to an aspect of the present invention, a detecting apparatus is provided for detecting a liquid crystal amount of a liquid crystal panel, comprising: an acquiring unit, configured to collect incident Light passing through the ordinary light and the extraordinary light formed by the liquid crystal panel to obtain a distance between the light exiting point of the ordinary light and the light exiting point of the extraordinary light, the incident light and the liquid crystal in the liquid crystal panel The optical axis of the molecule has a preset angle; and a processing unit configured to obtain a thickness of the liquid crystal in the liquid crystal panel according to a distance between the respective light exiting points and the preset angle, and the thickness and the The set liquid crystal level difference data is compared to obtain the amount of liquid crystal in the liquid crystal panel.

In another aspect of the embodiments of the present invention, a liquid crystal dropping system is provided, comprising: a dripping machine for injecting liquid crystal between an array substrate formed by a pair of boxes and a color filter substrate, and the array substrate and Providing a spacer between the color filter substrates; and a drip detecting device for detecting an amount of liquid crystal injected between the array substrate and the color filter substrate, so as to be according to the amount of the injected liquid crystal Adjust the liquid crystal drip. The drip detecting device includes the above detecting device.

According to still another aspect of the embodiments of the present invention, a liquid crystal dropping control method includes the steps of: injecting liquid crystal between an array substrate and a color filter substrate formed on a pair of boxes, and the array substrate and the color filter substrate A spacer is disposed therebetween; and an amount of liquid crystal injected between the array substrate and the color filter substrate is detected to adjust liquid crystal dropping according to the amount of the injected liquid crystal. Detecting that liquid crystal has been injected between the array substrate and the color filter substrate The step of collecting the extraordinary light and the extraordinary light formed by the incident light passing through the liquid crystal panel to obtain the distance between the light exiting point of the ordinary light and the light exiting point of the extraordinary light, the incident light And having a predetermined angle with an optical axis of the liquid crystal molecules in the liquid crystal panel; and obtaining a thickness of the liquid crystal in the liquid crystal panel according to a distance between the respective light exiting points and the preset angle, and the The thickness is compared with a preset liquid crystal level difference data to obtain the amount of liquid crystal in the liquid crystal panel.

Embodiments of the present invention provide a detecting device, a liquid crystal dropping system, and a liquid crystal dropping control method. The liquid crystal drip system includes a drip chamber and a drip detecting device. The drip chamber drops liquid crystal between the array substrate formed by the cassette and the color filter substrate. The drip detecting device detects the amount of liquid crystal injected between the array substrate and the color filter substrate to adjust the liquid crystal dripping according to the amount of liquid crystal injected. Thereby, real-time detection and drip control of the liquid crystal filling amount can be realized, product quality and production efficiency can be improved, and production cost can be reduced. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. It will be apparent that the drawings in the following description are merely some embodiments of the invention. In the drawings: FIG. 1 is a schematic diagram of a detecting apparatus according to an embodiment of the present invention;

2 is a schematic structural diagram of a detecting device according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a liquid crystal birefringence according to an embodiment of the present invention;

4 is a schematic view of a pressurization principle of a pressurizing unit according to an embodiment of the present invention; FIG. 5 is a schematic structural view of a liquid crystal drip system according to an embodiment of the present invention; FIG. 7 is a detailed structural diagram of a liquid crystal dropping system according to an embodiment of the present invention;

8 is a schematic diagram of a column height calculation according to an embodiment of the present invention;

9 is a schematic flow chart of a liquid crystal dropping control method according to an embodiment of the present invention; FIG. 10 is a schematic diagram of a detecting process of a detecting device according to an embodiment of the present invention; FIG. 11 is a liquid crystal dropping system system according to an embodiment of the present invention. Note flow diagram; and FIG. 12 is a schematic diagram of a drip injection dripping process according to an embodiment of the invention. detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a schematic diagram of a detecting device 10 according to an embodiment of the invention. FIG. 2 is a detailed structural diagram of a detecting apparatus 10 according to an embodiment of the present invention. FIG. 3 is a schematic diagram of liquid crystal birefringence according to an embodiment of the invention. The detecting device 10 is for detecting the liquid crystal amount of the liquid crystal panel.

Referring to Figures 1 through 3, detection device 10 can include acquisition unit 101 and processing unit 102. The collecting unit 101 is configured to collect the ordinary light 0 and the extraordinary light E formed by the incident light L passing through the liquid crystal panel 20 to obtain the distance d between the light exiting point of the ordinary light 0 and the light exiting point of the extraordinary light E. The incident light L has a predetermined angle θ with the optical axis X of the liquid crystal molecules in the liquid crystal panel 20. The processing unit 102 is configured to obtain the thickness T of the liquid crystal 201 in the liquid crystal panel 20 according to the distance d between the respective light exiting points and the preset angle Θ, and compare the thickness Τ with the preset liquid crystal level difference data to obtain a liquid crystal panel. The amount of liquid crystal 201.

The detecting device 10 measures the thickness Τ of the liquid crystal 201 injected into the liquid crystal panel 20 by the principle of birefringence of liquid crystal. Fig. 3 schematically shows the principle of liquid crystal birefringence. Referring to FIG. 3, when the incident light L is at an angle Θ to the optical axis X of the liquid crystal molecule, due to the anisotropy of the liquid crystal molecules, the incident light L can be decomposed into a bundle of ordinary light 0 and a bundle that follow the refractive index. Follow the very light of the law of refraction. The distance between the light spots generated by the two beams of light passing through the liquid crystal 201 in the liquid crystal panel 20 is d. The processing unit 102 can convert the distance d into the thickness T of the liquid crystal 201 by the following formula:

Where η. It is the refractive index of ordinary light 0 in liquid crystal 201, and r is the refractive index of extraordinary light E in liquid crystal 201. FIG. 2 further shows the detailed structure of the detecting device 10. Referring to FIG. 2, the acquisition unit 101 may include a polarizer 1021, a diffusion plate 1022, and an LED backlight group 1023 for providing a light source to the liquid crystal panel 20. Further, although not shown in FIG. 2, the acquisition unit 101 may further include a Charge Coupled Device (CCD) camera or an infrared camera tube for implementing the acquisition function.

The operation of the acquisition unit 101 and the processing unit 102 will be described by taking a CCD camera as an example. The CCD camera collects the liquid crystal panel 20 in which birefringence occurs after the incident light L is irradiated, and converts the sampling result into an image signal. The converted image signal is transmitted to the processing unit 102. Unusual light 0 and extraordinary light E affect the pixel distribution, brightness, and color of the captured image. The processing unit 102 converts the acquired image signal into a digital signal according to the above parameters and performs various operations. Based on the distance d between the light exit point of the ordinary light 0 and the light exit point of the extraordinary light E, the thickness T of the liquid crystal 201 in the liquid crystal panel 20 can be obtained by the above calculation formula. Comparing the T thickness with the preset liquid crystal level difference data can be used to obtain the amount of the liquid crystal 201 in the liquid crystal panel. Although the operation principle of the acquisition unit 101 and the processing unit 102 is described by a CCD camera, the present invention is not limited thereto. Alternatively, the acquisition unit 101 may further include, for example, an infrared camera tube or other device having an acquisition function (for example, , ultrasound imaging equipment, etc.).

In addition, processing unit 102 may also have an alarm function. When the detecting device 101 cannot detect the liquid crystal panel 20, the processing unit 102 can automatically perform an alarm. As a result, the detection of faults can be prompted so that the staff can perform repairs and inspections in the first place.

According to an embodiment of the present invention, the detecting device 10 may further include a detecting chamber 103 for placing the liquid crystal panel 20 to be detected, as shown in FIG. The surface of the detection chamber 103 is provided with a detection window 110. The liquid crystal panel 20 can be observed through the detection window 110. The detection window 110 can include a low radiation protection glass cover.

According to an embodiment of the present invention, the detecting device 10 may further include a pressurizing unit 104 for performing a pressurization process on the liquid crystal panel 20 in the detecting chamber 103. The liquid crystal panel 20 can be subjected to a pressure treatment so that the injected liquid crystal in the liquid crystal panel functions as a support for the liquid crystal panel. Thereby, the liquid crystal in the liquid crystal cell is in a compressed state, which reduces the gap between the liquid crystal molecules, so as to more accurately measure the thickness of the liquid crystal, so that the pair has been injected The calculation of the amount of liquid crystal is more accurate.

4 is a schematic view showing the principle of pressurization of a pressurizing unit according to an embodiment of the present invention. Referring to FIG. 4, the pressurizing unit may include a Compressed Dry Air (CDA) jetting member 1041. As shown in FIG. 4, a vent hole 1010 is disposed in a lower portion of the detecting chamber, and the CDA ejecting member 1041 can eject a spiral gas to form an air cushion to lift the liquid crystal panel 20, so that the respective positions of the liquid crystal panel are uniformly pressed, thereby avoiding the liquid crystal panel. Bad phenomenon due to uneven pressure.

Although the pressurizing unit 104 has been described by taking the CDA ejecting member 1041 as an example, the present invention is not limited thereto. Other devices capable of pressurizing the liquid crystal panel should fall within the scope of the present invention.

According to an embodiment of the present invention, the detecting device 10 may further include a temperature control unit 105 for controlling the detected temperature in the detecting chamber 103, as shown in FIG. The temperature control unit 105 can adjust the temperature in the detection chamber to test the liquid crystal amount of the liquid crystal panel at different temperatures. The temperature control unit 105 can control the temperature in the detection chamber 103 to, for example, 65 ° C, because the operating temperature of the backlight of the liquid crystal panel is about 65 ° C, so that the environment and actual operation of the liquid crystal panel under test The liquid crystal panels in the environment are close to each other to ensure more accurate test results. In addition, in order to better simulate the actual working environment of the liquid crystal panel, the temperature of the detection chamber can be adjusted according to different regional environmental temperatures.

By adopting such a detecting device, the amount of liquid crystal injected between the array substrate formed by the box and the color filter substrate can be detected, thereby performing feedback adjustment on the amount of liquid crystal to be dripped according to the amount of liquid crystal injected. Real-time detection of the amount of liquid crystal filling to optimize the production line and improve product quality.

FIG. 5 is a schematic structural diagram of a liquid crystal dropping system according to an embodiment of the present invention. As shown in Fig. 5, the liquid crystal drip system may include a drip chamber 01 and a drip detecting device 02. FIG. 6 is a schematic structural diagram of a liquid crystal panel according to an embodiment of the invention.

Referring to FIGS. 5 and 6, the drip filling machine 01 is for injecting liquid crystal between the array substrate 40 and the color filter substrate 41, and a spacer 42 is disposed between the array substrate 40 and the color filter substrate 41. The drip detecting device 02 is for detecting the amount of liquid crystal injected between the array substrate 40 and the color filter substrate 41 to adjust the liquid crystal dripping according to the amount of liquid crystal injected. Instillation The detecting device 02 can include the above-described detecting device 10.

According to an embodiment of the present invention, the drip detecting device 02 may further include a gravity spot detecting machine 11, a box thickness detecting machine 12, and/or an initial detecting machine including the column height detecting machine 13, as shown in Fig. 7.

The gravity mark detecting machine 11 is for detecting a bad phenomenon of gravity marks based on the amount of liquid crystal injected between the array substrate 40 and the color filter substrate 41. The following is a brief description of the causes of gravity scratches.

The liquid crystal panel of the liquid crystal display is generally in an upright state during use. Due to the gravity factor of the liquid crystal itself, the amount of liquid crystal at the bottom of the liquid crystal panel relative to other regions is large. In addition, since the operating temperature of the backlight of the liquid crystal panel is about 65 ° C, the liquid crystal in the liquid crystal panel is inflated by the influence of temperature, causing a serious change in the thickness of the cell at the bottom of the liquid crystal panel. This causes color unevenness at the bottom of the liquid crystal panel, which is called a gravity mark phenomenon. Such an undesirable phenomenon can reduce the display effect of the display device and the quality of the product.

By using the gravity mark detecting machine 11, the gravity mark phenomenon can be detected according to the amount of liquid crystal injected between the array substrate 40 and the color filter substrate 41, thereby avoiding the adverse effect on the display effect of the display device due to the occurrence of the gravity mark phenomenon. .

The cell thickness detecting machine 12 is for detecting the cell thickness parameter based on the amount of liquid crystal injected between the array substrate 40 and the color filter substrate 41. The amount of liquid crystal injected can be further detected by the box thickness parameter, thereby improving the precision of the liquid crystal dropping system.

The initial detector is used to detect the amount of pre-injected liquid crystal between the array substrate 40 and the color filter substrate 41. Wherein, the initial detecting machine may include a column height detecting machine 13 for detecting the height of the spacer 42 to detect the amount of liquid crystal pre-injected between the array substrate 40 and the color filter substrate 41 according to the height of the spacer 42. . In this way, the detection before the array of the array substrate 40 and the color filter substrate 41 can be added during the manufacturing process of the display panel, thereby screening out the array substrate having the spacers 42 that do not meet the specified threshold range, so as to reduce Defective rate. Further, it is also possible to determine the amount of liquid crystal pre-injected into the liquid crystal cell by detecting the change in height having the spacer 42 within the threshold range.

FIG. 8 is a schematic diagram of a column height calculation according to an embodiment of the invention. As shown in Fig. 8, the height of the spacer 42 is calculated as: H = CG + Dcf - Dtft;

H is the height of the spacer, that is, the height of the column;

CG is the cell thickness of the array substrate 40 and the color filter substrate 41 after the box is closed; Dcf is the height difference between the color filter structure 410 on the color filter substrate 41 and the black matrix 411;

Dtft is the step difference of the array substrate 40.

The following is a detailed explanation of the compensation principle of the liquid crystal amount in the liquid crystal dropping system: In the process of manufacturing the liquid crystal panel by the One Drop Fill (0DF) method, the main factors affecting the change of the thickness of the cell are the total amount of the liquid crystal and the column. high. Assuming that the total amount of liquid crystal is P, the actual volume in the plane of the liquid crystal panel is Pv.

Through a plurality of experimental tests, the data of the test sample is linearly analyzed, and the actual amount of the liquid drop can make the total amount of the liquid crystal a linear equation within a certain range. Therefore, the actual volume in the plane of the LCD panel is:

Pv = A * P + B, where A and B are each a constant.

According to the above linear analysis of multiple sets of experimental test data sets, the in-plane ideal volume of the liquid crystal panel has the following formula:

The ideal volume = C * CG * E + D , where C and D are each a constant, CG is the thickness of the box, and E is the area of the enclosed area of the main sealant area.

Theoretically, the actual volume Pv in the plane of the liquid crystal panel should be equal to the ideal volume in the plane of the liquid crystal panel. Therefore, A * P + B = C * CG * E + D. Thus, you can export:

P = (C * CG * E + D - B) / A

Assume that the total amount of liquid crystal currently instilled is by first dropping a fixed amount of liquid crystal X, and then instilling the fine-tuned liquid crystal amount Y, BP, P = X + Y according to the corrected data. Therefore, the target variable is the amount of fine-tuning liquid crystal to be corrected. At this point, the following formula is obtained:

Υ = Ρ - X = (C * CG * E + D - B) / A - X

The principle of detecting the column height by the above column height detecting machine shows that the column height of the spacer 42 is: H = CG + Dcf - Dtft;

Therefore, the box thickness CG = H - Dcf + Dtft;

The calculation formula for bringing the CG into the above-mentioned fine adjustment liquid crystal amount Y can be obtained:

Y = (C * CG * E + D - B) / A - X = (C * (H - Dcf + Dtft) * E + D - B) / A - X.

From the ideal volume in the plane of the liquid crystal panel, the liquid crystal correction value of each liquid crystal panel can be obtained, thereby controlling the variation of the thickness of the box and avoiding the generation of gravity marks.

FIG. 9 is a schematic flow chart of a liquid crystal dropping control method according to an embodiment of the invention. Referring to FIGS. 6 and 9, a liquid crystal dropping control method according to an embodiment of the present invention includes the steps of: dropping a liquid crystal between a pair of array-formed array substrates 40 and a color filter substrate 41, wherein the array substrate 40 and the color filter substrate are A spacer 42 is disposed between 41 (S101); and an amount of liquid crystal injected between the array substrate 40 and the color filter substrate 41 is detected to adjust the liquid crystal dripping according to the amount of liquid crystal injected (S102).

The step of detecting the amount of liquid crystal injected between the array substrate 40 and the color filter substrate 41 may include:

The ordinary light and the extraordinary light formed by the incident light passing through the liquid crystal panel are collected to obtain a distance between the light exiting point of the ordinary light and the light exiting point of the extraordinary light, and the incident light and the optical axis of the liquid crystal molecule in the liquid crystal panel have a preset clip. Angle; and

The thickness of the liquid crystal in the liquid crystal panel is obtained according to the distance between the respective light exiting points and the predetermined angle, and the thickness is compared with the preset liquid crystal level difference data to obtain the amount of liquid crystal in the liquid crystal panel.

FIG. 10 is a schematic diagram of a detection process of a detecting apparatus according to an embodiment of the present invention. Referring to Figure 2, Figure 3, Figure 4 and Figure 10, the detection process includes the steps:

Loading the detected liquid crystal panel 20 into the detection chamber 103 (S201);

Light up the LED backlight group 1023, and adjust the LED backlight group 1023 to achieve the best brightness state (S202);

The CDA ejecting member 1041 of the pressurizing unit 104 pressurizes the liquid crystal panel 20 in the detecting chamber 103, so that the injected liquid crystal in the liquid crystal panel 20 supports the liquid crystal panel (S203);

The temperature control unit 105 controls the temperature in the detection chamber 103 to 65 ° C (S204); the acquisition unit 101 collects the liquid crystal panel 20 that has undergone birefringence after the incident light L is irradiated, and converts the sampling result into an image signal. Image signal is transmitted to the processing unit 102 (S205);

The processing unit 102 converts the acquired image signal into a digital signal and performs various In the calculation, the thickness T of the liquid crystal in the liquid crystal panel 20 is obtained from the distance d between the light-emitting points, and the thickness of the liquid crystal is compared with the predetermined liquid crystal level difference data to obtain the amount of the liquid crystal 201 in the liquid crystal panel (S206).

Embodiments of the present invention provide a liquid crystal dropping control method for real-time monitoring and drip control of a liquid crystal amount between an array substrate and a color filter substrate formed by a liquid crystal dropping system. The liquid crystal drip system includes a drip chamber and a drip detecting device. The drip chamber drops liquid crystal between the array substrate formed by the pair of boxes and the color filter substrate. The drip detecting device detects the amount of liquid crystal dripped to adjust the liquid crystal dripping according to the detection result. Real-time detection and drip control of liquid crystal filling amount is realized, thereby improving product quality and production efficiency, and reducing production cost.

According to an embodiment of the present invention, the control method may further include the steps of: detecting a defect of the gravity mark according to the amount of liquid crystal injected between the array substrate 40 and the color filter substrate 41; and/or

The cell thickness parameter is detected based on the amount of liquid crystal injected between the array substrate 40 and the color filter substrate 41.

By using the gravity mark detecting machine 11, the gravity mark phenomenon can be detected according to the amount of liquid crystal injected between the array substrate 40 and the color filter substrate 41, thereby avoiding the adverse effect on the display effect of the display device due to the occurrence of the gravity spot phenomenon. In addition, the amount of liquid crystal injected can be further detected by the box thickness parameter, thereby improving the accuracy of the liquid crystal dropping system.

According to an embodiment of the present invention, the control method may further include the step of: detecting the amount of pre-injected liquid crystal between the array substrate 40 and the color filter substrate 41 before the cassette is applied. Wherein, the amount of liquid crystal pre-injected between the array substrate and the color filter substrate is detected according to the height of the spacer.

The initial detecting machine may include a column height detecting machine 13 for detecting the height of the spacer 42 to detect the amount of pre-injected liquid crystal between the array substrate 40 and the color filter substrate 41 in accordance with the height of the spacer 42. In this way, the detection before the array of the array substrate 40 and the color filter substrate 41 can be added during the manufacturing process of the display panel, thereby screening the array substrate having the spacers 42 that do not meet the specified threshold range, thereby reducing Small defect rate. Further, it is also possible to change the height of the spacer 42 having a range within a threshold range. The detection is performed to determine the amount of liquid crystal pre-injected into the liquid crystal cell.

FIG. 11 is a schematic diagram of a drip flow of a liquid crystal drip system according to an embodiment of the present invention, and FIG. 12 is a schematic diagram of a drip flow of a drip dispenser according to an embodiment of the present invention. Referring to Fig. 1 1 and Fig. 12, the linkage process between the column height detecting machine 13 and the drip chamber 01 and the working process of the drip machine 01 will be described in detail.

The column height detecting machine 13 measures the height of the spacer substrate 40 of the array substrate 40, and determines whether the height of the spacer 42 is within a predetermined threshold (S301);

If the result of the determination in step S301 is YES, the design value of the instillation liquid crystal amount and the height data of the compensated PS spacer 42 are subjected to data processing, and liquid crystal instillation is performed according to the compensated liquid crystal amount (S302). ;

If the result of the determination in step S301 is negative, the array substrate 40 is subjected to the failure processing (S303);

The liquid crystal dropping detection is performed to detect whether the amount of the pre-drop liquid crystal is correct (S304); if the determination result in the step S304 is YES, the pair of the substrate 40 and the color film substrate 41 are forwarded to the cassette (S305);

If the result of the determination in step S304 is negative, it is detected whether the amount of the pre-drip liquid crystal passes the compensation process (S306);

If the result of the determination in step S306 is no, the uncompensated pre-drip liquid crystal amount is compensated (S307);

If the result of the determination in the step S306 is YES, the amount of the pre-drip liquid crystal which is excessively dripped is subjected to the defective processing (S308).

The working process of the drip machine 01 is as follows:

The digital-to-analog conversion (D/A) module of the dripper main control unit outputs a control signal to the corresponding servo width (S401);

Connecting the servo shaft mechanism to drive the drip needle (S402);

Adjusting the amount of liquid crystal dripping (S403);

The current position of the piston is fed back by the displacement sensor, and it is judged whether the adjustment position is reached (S404);

If the result of the determination in step S404 is YES, the new liquid crystal drip center value data is uploaded (S405); Initializing the drip part of the drip chamber to perform liquid crystal dripping (S406);

If the decision result in the step S404 is NO, the process returns to the step S401.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The steps of the foregoing method embodiments are included; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

Rights request

1. A detection device for detecting the amount of liquid crystal in a liquid crystal panel, which includes: a collection unit for collecting ordinary light and extraordinary light formed by incident light passing through the liquid crystal panel to obtain the ordinary light The distance between the light emitting point and the extraordinary light emitting point, the incident light has a preset angle with the optical axis of the liquid crystal molecules in the liquid crystal panel; and

A processing unit configured to obtain the thickness of the liquid crystal in the liquid crystal panel based on the distance between the light emitting points and the preset included angle, and compare the thickness with the preset liquid crystal level difference data to obtain the result. Describes the amount of liquid crystal in the LCD panel.

2. The detection device according to claim 1, further comprising:

Detection cavity, used to place the liquid crystal panel to be detected; and

A pressurizing unit is used to pressurize the liquid crystal panel in the detection chamber.

3. The detection device according to claim 2, wherein the pressurizing unit includes a compressed dry air injection component.

4. The detection device according to claim 2, further comprising:

A temperature control unit is used to control the detection temperature in the detection chamber.

5. A liquid crystal dripping system, which includes:

A dripping machine for dripping liquid crystal between the array substrate and the color filter substrate formed in a box, with a spacer provided between the array substrate and the color filter substrate; and

Dripping detection equipment, used to detect the amount of liquid crystal injected between the array substrate and the color filter substrate, so as to adjust the liquid crystal dripping according to the amount of injected liquid crystal, wherein the dripping detection equipment includes The detection device according to any one of claims 1-4.

6. The liquid crystal dripping system according to claim 5, wherein the dripping detection Equipment also includes:

A gravity mark detection machine, used to detect the undesirable phenomenon of gravity marks based on the amount of liquid crystal injected between the array substrate and the color filter substrate; and/or

A cell thickness detector, used to detect cell thickness parameters based on the amount of liquid crystal injected between the array substrate and the color filter substrate.

7. The liquid crystal dripping system according to claim 5, wherein the dripping detection device further includes:

An initial detection machine, used to detect the amount of liquid crystal pre-injected between the array substrate and the color filter substrate before the box is assembled,

Wherein, the initial detection machine includes:

A column height detector is used to detect the height of the spacer, so as to detect the amount of liquid crystal pre-injected between the array substrate and the color filter substrate according to the height of the spacer.

8. A liquid crystal drip control method, including the steps:

Liquid crystal is dripped between the array substrate and the color filter substrate formed in the box, and a spacer is provided between the array substrate and the color filter substrate; and

Detecting the amount of liquid crystal injected between the array substrate and the color filter substrate, so as to adjust the liquid crystal dripping according to the amount of injected liquid crystal,

Wherein, the step of detecting the amount of liquid crystal injected between the array substrate and the color filter substrate includes:

Collect the ordinary light and the extraordinary light formed by the incident light passing through the liquid crystal panel to obtain the distance between the light exit point of the ordinary light and the light exit point of the extraordinary light. The incident light and the light emitting point in the liquid crystal panel are The optical axes of the liquid crystal molecules have a preset angle; and

The thickness of the liquid crystal in the liquid crystal panel is obtained according to the distance between the light emitting points and the preset angle, and the thickness is compared with the preset liquid crystal level difference data to obtain the liquid crystal in the liquid crystal panel. amount.

9. The control method according to claim 8, further comprising the steps: Detect the undesirable phenomenon of gravity spots based on the amount of liquid crystal injected between the array substrate and the color filter substrate; and/or

The cell thickness parameter is detected based on the amount of liquid crystal injected between the array substrate and the color filter substrate.

10. The control method according to claim 8, further comprising the steps:

Before assembling the box, the amount of liquid crystal pre-injected between the array substrate and the color filter substrate is detected,

Wherein, the amount of liquid crystal pre-injected between the array substrate and the color filter substrate is detected based on the height of the spacer.