Device and method for measuring liquid crystal filling amount of display, and display device

Abstract

The embodiments of the present invention provide a device and method for determining the amount of liquid crystal filling in a display, and a display device. The device for determining the amount of liquid crystal filling in a display comprises a measuring unit and a processing unit; the measuring unit comprises a water tank and a water level measuring device arranged in the water tank, the water tank is used to accommodate a film structure of a liquid crystal display panel in a display area; the water level measuring device is used to measure the water level value of the liquid in the water tank after the water tank accommodates the film structure; the processing unit is connected to the measuring unit, the processing unit compares the water level value measured by the measuring unit with a preset water level value to obtain the water level change value, and then obtains the volume of the film structure according to the water level change value, thereby improving the accuracy of determining the amount of liquid crystal filling in the display.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a device and method for measuring the liquid crystal filling amount of a display, and a display device. Background Art

[0002] With the continuous innovation of LCD screen technology and processes, the size of LCD motherboard glass has increased from generation to generation and has developed to 2290mm x3370mm. It is expected that the next generation of LCD screens will continue to increase, which puts higher requirements on the manufacturing process. The manufacturing process of TIT-LCD LCD screen is to bond two pieces of motherboard glass sprayed with evenly spaced materials. The distance between the two glasses is 3 to 5μm, which is used to fill the liquid crystal material in a vacuum state. The amount of liquid crystal filling will directly affect the picture quality of the LCD screen. When the filling amount is too large, the LCD screen will turn yellow or white; when the filling amount is too small, the LCD screen picture is abnormal.

[0003] The general process requires that the liquid crystal filling amount is less than 1% of the theoretical value. The liquid crystal filling amount is directly proportional to the thickness of the liquid crystal cell, and is also related to factors such as the in-plane step difference. Therefore, in order to improve the qualified rate of finished products and reduce production costs, the thickness of the liquid crystal cell must be detected in real time to obtain specific parameters and provide parameter basis for the liquid crystal filling amount. The current method for determining the liquid crystal filling amount is to first calculate the center liquid crystal filling amount based on the product target CG (i.e., the cell spacing), and then set a range of 6% to 10% up and down based on the center liquid crystal filling amount. A liquid crystal motherboard is selected for each range. After the box is formed, it is put into a high and low temperature environment. Finally, the liquid crystal filling amount corresponding to 1% below the gravity Mura is the upper limit of the safety range, and the liquid crystal filling amount corresponding to 1% above the vacuum bubble is the lower limit of the safety range.

[0004] At present, this method cannot determine whether the product's liquid crystal filling safety range can meet the actual quality requirements of the LCD screen. Subsequent design changes and process adjustments are required to meet the quality requirements. The above steps need to be repeated many times, resulting in a huge waste of resources and production capacity. Summary of the invention

[0005] The embodiments of the present invention provide a device and method for measuring the liquid crystal filling amount of a display, and a display device, so as to improve the accuracy of measuring the liquid crystal filling amount of the display.

[0006] In a first aspect, an embodiment of the present invention provides a device for measuring liquid crystal filling amount of a display, comprising a measuring unit and a processing unit;

[0007] The measuring unit comprises a water tank and a water level measuring device arranged in the water tank, wherein the water tank is used to accommodate the film layer structure of the liquid crystal display panel in the display area; the water level measuring device is used to measure the water level value of the measuring liquid in the water tank after the water tank accommodates the film layer structure;

[0008] The processing unit is connected to the measuring unit, and the processing unit compares the water level value measured by the measuring unit with a preset water level value to obtain the volume of the membrane layer structure.

[0009] In an exemplary embodiment, the water tank includes a cover plate and a receiving cavity disposed in the cover plate, and the receiving cavity is provided with an opening for the membrane layer structure to enter and exit.

[0010] In an exemplary embodiment, at least two of the accommodating cavities are provided in the cover plate, the liquid crystal display panel includes at least two of the display areas and a film layer structure provided on the display areas, and the accommodating cavities correspond one-to-one to the film layer structure on the display areas.

[0011] In an exemplary embodiment, at least two accommodating cavities with different volumes are disposed in the cover plate.

[0012] In an exemplary embodiment, the measuring unit further includes a water injection device, the water injection device includes a water injection pipe and a first nozzle arranged on the water injection pipe, a water inlet is arranged on the water tank, and the first nozzle is arranged corresponding to the water inlet.

[0013] In an exemplary embodiment, a second nozzle is further included, and the second nozzle is used to clean the liquid crystal display panel after being measured by the measuring unit, and the second nozzle and the first nozzle share the water injection pipe.

[0014] In an exemplary embodiment, the measuring unit further includes a lifting structure, which is connected to the water tank and can drive the water tank to move along a direction of a film layer structure close to the liquid crystal display panel in a display area.

[0015] In an exemplary embodiment, the measuring unit further includes a conveying mechanism, which is located on one side of the water tank and can drive the liquid crystal display panel to move so that the film layer structure of the liquid crystal display panel in the display area is arranged corresponding to the water tank.

[0016] In a second aspect, an embodiment of the present invention provides a method for measuring a liquid crystal filling amount of a display, comprising:

[0017] Measuring the volume of the film structure of the liquid crystal display panel in the display area;

[0018] The volume of the actual liquid crystal box thickness is obtained according to the difference between the volume of the set liquid crystal box thickness and the volume of the film layer structure, and then the liquid crystal filling amount of the display is obtained; wherein, the volume of the set liquid crystal box thickness is the product of the area of ​​the display area of ​​the liquid crystal display panel and the set liquid crystal box thickness.

[0019] In an exemplary embodiment, measuring the volume of the film layer structure of the liquid crystal display panel in the display area includes:

[0020] The film layer structure in the display area of ​​the liquid crystal display panel is immersed in a water tank, and the volume of the film layer structure is obtained by measuring the water level change of the liquid in the water tank.

[0021] In a third aspect, an embodiment of the present invention provides a display device, which is prepared by any of the above-mentioned methods for measuring the liquid crystal filling amount of a display.

[0022] The present invention provides a device and method for measuring the liquid crystal filling amount of a display, and a display device. The water level value of a film layer structure of a liquid crystal display panel in a display area in a water tank is measured by a measuring unit, and then a water level change value is obtained according to the water level value by a processing unit, and then the volume of the film layer structure is obtained, so as to calculate the liquid crystal filling amount of the liquid crystal display panel after boxing, thereby improving the accuracy of measuring the liquid crystal filling amount of the liquid crystal display.

[0023] Of course, it is not necessary to achieve all of the advantages described above at the same time when implementing any product or method of the present invention. Other features and advantages of the present invention will be described in the subsequent description embodiments, and partly become apparent from the description embodiments, or be understood by practicing the present invention. The purposes and other advantages of the embodiments of the present invention can be achieved and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention. The shapes and sizes of the components in the accompanying drawings do not reflect the actual proportions and are only intended to illustrate the contents of the present invention.

[0025] Figure 1 A schematic diagram of the structure of a measuring unit in a device for measuring liquid crystal filling amount of a display provided by an embodiment of the present disclosure;

[0026] Figure 2 An enlarged view of a measuring unit in a device for determining liquid crystal filling amount of a display provided by an embodiment of the present disclosure;

[0027] Figure 3 A cross-sectional view of a measuring unit in a device for determining liquid crystal filling amount of a display provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0028] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention. It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined arbitrarily with each other.

[0029] Liquid crystal display (LCD) has become the mainstream product of display devices at present. Liquid crystal display mainly includes relatively arranged liquid crystal display panels and liquid crystal arranged between the liquid crystal display panels. The liquid crystal display panel can be a color film substrate or an array substrate. The array substrate includes a plurality of thin film transistors (TFT) and electrodes connected to the thin film transistors, which are used to control the state of the liquid crystal; the liquid crystal deflection modulates the backlight output; the color film substrate includes a plurality of color film layers (including RGB) for coloring the output light and finally realizing the display. When the liquid crystal display panel is a color film substrate, the film layer structure of the liquid crystal display panel in the display area includes a color film layer. When the liquid crystal display panel is an array substrate, the film layer structure of the liquid crystal display panel in the display area includes a thin film transistor, an electrode and a spacer film layer.

[0030] The production process of LCD includes the production of array substrate (TFT process) and color film substrate (CF process) in the front stage, the cell assembly of LCD panel in the middle stage and the module assembly in the back stage. The cell assembly stage mainly combines the array substrate with the color film substrate and fills the liquid crystal between them. The filling amount of liquid crystal plays a decisive role in the display quality of the display device.

[0031] An embodiment of the present invention provides a device for measuring the liquid crystal filling amount of a display, comprising a measuring unit and a processing unit;

[0032] The measuring unit comprises a water tank and a water level measuring device arranged in the water tank, wherein the water tank is used to accommodate the film layer structure of the liquid crystal display panel in the display area; the water level measuring device is used to measure the water level value of the measuring liquid in the water tank after the water tank accommodates the film layer structure;

[0033] The processing unit is connected to the measuring unit, and the processing unit compares the water level value measured by the measuring unit with a preset water level value to obtain the volume of the membrane layer structure.

[0034] The device for measuring the liquid crystal filling amount of a display in an embodiment of the present invention measures the water level value of the film layer structure of the liquid crystal display panel in the display area in the water tank through a measuring unit, and then obtains the water level change value according to the water level value through a processing unit, and then obtains the volume of the film layer structure to calculate the liquid crystal filling amount of the liquid crystal display panel after the liquid crystal display panel is boxed, thereby improving the accuracy of measuring the liquid crystal filling amount of the liquid crystal display.

[0035] Figure 1 A schematic diagram of the structure of a measuring unit in a device for measuring liquid crystal filling amount of a display provided by an embodiment of the present disclosure; Figure 2 This is an enlarged view of a measuring unit in a device for determining the liquid crystal filling amount of a display provided by an embodiment of the present disclosure. Figure 1 and Figure 2 As shown, the water tank 10 includes a cover plate 1 and a receiving cavity 2 arranged in the cover plate 1. The size of the receiving cavity 2 is not less than the size of the film structure 3 of the liquid crystal display panel 40 in the display area, so that the receiving cavity 2 can accommodate the entire film structure 3 of the liquid crystal display panel 40 in the display area. The receiving cavity 2 is provided with an opening for the film structure 3 of the liquid crystal display panel 40 in the display area to enter and exit, and the film structure 3 enters the receiving cavity 2 through the opening. The water level measuring device 20 is arranged on the inner wall of the water tank 10. When the film structure 3 of the liquid crystal display panel 40 in the display area corresponds to the opening of the receiving cavity 2, the water tank 10 is controlled to move in a direction close to the liquid crystal display panel 40, so that the film structure 3 of the liquid crystal display panel 40 in the display area enters the receiving cavity 2 through the opening of the receiving cavity 2, and then a preset volume of measuring liquid is injected into the receiving cavity 2 of the water tank 10. The water level measuring device 20 measures the water level value of the measuring liquid in the receiving cavity 2 after the water tank 10 accommodates the film structure 3. The processing unit is connected to the water level measuring device 20 in the measuring unit, and the processing unit can receive the water level value measured by the water level measuring device 20, and compare the water level value with the preset water level value to obtain the water level change value, and then obtain the volume of the membrane structure 3 according to the water level change value. The preset water level value refers to the water level value of the preset volume of the measuring liquid injected when the accommodating cavity 2 does not contain an object.

[0036] In an exemplary embodiment, the water level measuring device 20 may be a water level sensor or a scale.

[0037] In an exemplary embodiment, the processing unit may be an LC device (similar to PS-LC linkage), which can obtain a water level change value based on a comparison between a water level value and a preset water level value, and then obtain the volume of the membrane structure 3 based on the water level change value.

[0038] In an exemplary embodiment, at least two accommodating cavities 2 are provided in the cover plate 1, the liquid crystal display panel 40 includes at least two display areas and a film layer structure 3 provided on the display area, and the accommodating cavities 2 correspond one-to-one to the film layer structures 3 on the display area, so that the measuring unit can simultaneously measure the film layer structures 3 of multiple display areas on the liquid crystal display panel 40, thereby improving the measurement efficiency.

[0039] In an exemplary embodiment, at least two accommodating cavities 2 with different volumes are provided in the cover plate 1, so that the water tank 10 can measure the volume of the film layer structure on display areas of different sizes according to production requirements.

[0040] In an exemplary embodiment, the measuring unit also includes a water injection device 50, which includes a water injection pipe 5 and a first nozzle 6 arranged on the water injection pipe 5. A water inlet 7 is provided on the water tank 10, and the water inlet 7 is connected to the accommodating chamber 2 in the water tank 10. The first nozzle 6 is arranged corresponding to the water inlet 7 and is used to inject a preset volume of measuring liquid into the accommodating chamber 2.

[0041] In an exemplary embodiment, the device for determining the liquid crystal filling amount of a display further includes a second nozzle, which is used to clean the liquid crystal display panel after being measured by the measuring unit, and the second nozzle shares a water injection pipeline with the first nozzle.

[0042] The measuring unit in the device for determining the liquid crystal filling amount of a display provided in the embodiment of the present disclosure can be located in the cleaning section of ODF (liquid crystal drop fabrication) and is arranged in a cleaning machine, so that the device for determining the liquid crystal filling amount of a display provided in the embodiment of the present disclosure does not need to occupy an additional production line and does not need to add additional processes. The volume of the film layer structure 3 can be measured during the cleaning process, thereby reducing the number of tests, saving development costs, accelerating the development progress, saving time in product development, and being both accurate and efficient.

[0043] In an exemplary embodiment, the measuring unit further includes a lifting structure 30, which is connected to the water tank 1 and can drive the water tank 1 to move along the film structure 3 in the display area close to the liquid crystal display panel 40. The lifting structure 30 can be a driving motor.

[0044] In an exemplary embodiment, the measuring unit further includes a conveying mechanism, which is located at one side of the water tank 1 and is used to drive the liquid crystal display panel 40 to move so that the film layer structure 3 of the liquid crystal display panel 40 in the display area is arranged corresponding to the water tank 1. The conveying mechanism may be a roller.

[0045] When the liquid crystal display panel is moved to the bottom of the water tank 10 by the conveying mechanism, the membrane structure 3 of the liquid crystal display panel 40 in the display area is arranged corresponding to the opening of the water tank 10, and the water tank 10 is lowered by the lifting structure 30, so that the membrane structure 3 of the liquid crystal display panel in the display area enters the water tank 10 through the opening of the water tank 10, and then the preset volume of the measuring liquid is injected into the accommodating chamber 2 in the water tank 10 through the first nozzle 6, and the water level measuring device 20 in the water tank 10 measures the water level value of the measuring liquid in the water tank 10 after the water tank 10 accommodates the membrane structure 3 of the liquid crystal display panel in the display area. The processing unit receives the water level value measured by the water level measuring device 20, and compares the water level value with the preset water level value to obtain the water level change value, and then obtains the volume of the membrane structure 3 according to the water level change value.

[0046] In an exemplary embodiment, the processing unit is also used to obtain the actual liquid crystal box thickness volume based on the difference between the volume of the set liquid crystal box thickness and the volume of the film layer structure 3 of the liquid crystal display panel in the display area, and then obtain the liquid crystal filling amount of the display based on the actual liquid crystal box thickness volume; wherein the set liquid crystal box thickness volume is the product of the area of ​​the display area of ​​the liquid crystal display panel and the liquid crystal box thickness after the preset liquid crystal display panel is aligned.

[0047] In an exemplary embodiment, the device for measuring the amount of liquid crystal filling in a display according to an embodiment of the present invention can perform random measurement on the same batch of liquid crystal display panels to improve the production efficiency of the liquid crystal display panels and reduce the impact of the device for measuring the amount of liquid crystal filling in a display on the production capacity. For example, the device for measuring the amount of liquid crystal filling in a display performs random measurement once for every 10 liquid crystal display panels in the same batch.

[0048] In a second aspect, an embodiment of the present invention provides a method for measuring a liquid crystal filling amount of a display, comprising:

[0049] Measuring the volume of the film structure of the liquid crystal display panel in the display area;

[0050] The volume of the actual liquid crystal box thickness is obtained according to the difference between the volume of the set liquid crystal box thickness and the volume of the film layer structure, and then the liquid crystal filling amount of the display is obtained; wherein, the volume of the set liquid crystal box thickness is the product of the area of ​​the display area of ​​the liquid crystal display panel and the set liquid crystal box thickness.

[0051] In an exemplary embodiment, measuring the volume of the film layer structure of the liquid crystal display panel in the display area includes:

[0052] The film layer structure in the display area of ​​the liquid crystal display panel is immersed in a water tank, and the volume of the film layer structure is obtained by measuring the water level change of the liquid in the water tank.

[0053] In a third aspect, an embodiment of the present invention provides a display device, which is prepared by any of the above-described methods for determining the liquid crystal filling amount of a display. The display device includes, for example, a mobile phone, a tablet computer, a smart wearable product (smart watch, bracelet), a personal digital assistant (PDA), a car computer, etc. The embodiment of the present application does not impose any special restrictions on the specific form of the above-mentioned display device.

[0054] In the description of the embodiments of the present invention, it should be understood that the terms "middle", "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0055] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Although the embodiments disclosed in the present invention are as above, the contents described are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any technician in the field to which the present invention belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A device for measuring the amount of liquid crystal filling in a display, characterized in that: including a measuring unit and a processing unit; The measuring unit comprises a water tank and a water level measuring device arranged in the water tank, wherein the water tank is used to accommodate the film structure of the liquid crystal display panel in the display area; the water level measuring device is used to measure the water level value of the measuring liquid in the water tank after the water tank accommodates the film structure; the water level measuring device is a water level sensor or a scale line; The processing unit is connected to the measuring unit, and the processing unit compares the water level value measured by the measuring unit with a preset water level value to obtain the volume of the membrane layer structure.

2. The device for measuring the amount of liquid crystal filling in a display according to claim 1, characterized in that: The water tank comprises a cover plate and a receiving cavity arranged in the cover plate, and the receiving cavity is provided with an opening for the membrane layer structure to enter and exit.

3. The device for measuring the amount of liquid crystal filling in a display according to claim 2, characterized in that: At least two of the accommodating cavities are arranged in the cover plate, the liquid crystal display panel includes at least two of the display areas and a film layer structure arranged on the display area, and the accommodating cavities correspond to the film layer structures on the display area one by one.

4. The device for measuring the amount of liquid crystal filling in a display according to claim 2, characterized in that: At least two accommodating cavities with different volumes are arranged in the cover plate.

5. The device for measuring the amount of liquid crystal filling in a display according to claim 1, characterized in that: The measuring unit further comprises a water injection device, which comprises a water injection pipe and a first nozzle arranged on the water injection pipe. A water inlet is arranged on the water tank, and the first nozzle is arranged corresponding to the water inlet.

6. The device for measuring the amount of liquid crystal filling in a display according to claim 5, characterized in that: It also includes a second nozzle, which is used to clean the liquid crystal display panel after being measured by the measuring unit, and the second nozzle and the first nozzle share the water injection pipeline.

7. The device for measuring the amount of liquid crystal filling in a display according to claim 1, characterized in that: The measuring unit further comprises a lifting structure, which is connected to the water tank and can drive the water tank to move along the direction of the film layer structure close to the display area of ​​the liquid crystal display panel.

8. The device for measuring the amount of liquid crystal filling in a display according to claim 1, characterized in that: The measuring unit further comprises a conveying mechanism, which is located at one side of the water tank and can drive the liquid crystal display panel to move so that the film layer structure of the liquid crystal display panel in the display area is arranged corresponding to the water tank.

9. A method for measuring the liquid crystal filling amount of a display using the device for measuring the liquid crystal filling amount of a display according to any one of claims 1 to 8, characterized in that: include: Measuring the volume of the film structure of the liquid crystal display panel in the display area; The volume of the actual liquid crystal box thickness is obtained according to the difference between the volume of the set liquid crystal box thickness and the volume of the film layer structure, and then the liquid crystal filling amount of the display is obtained; wherein, the volume of the set liquid crystal box thickness is the product of the area of ​​the display area of ​​the liquid crystal display panel and the set liquid crystal box thickness.

10. The method for measuring the liquid crystal filling amount of a display according to claim 9, characterized in that: Measuring the volume of the film structure of the LCD panel in the display area, including: The film layer structure in the display area of ​​the liquid crystal display panel is immersed in a water tank, and the volume of the film layer structure is obtained by measuring the water level change of the liquid in the water tank.

11. A display device, characterized in that: The device is prepared by the method for determining the liquid crystal filling amount of a display as described in claim 9 or 10.

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