CN107436515B - Liquid crystal dripping device - Google Patents
Liquid crystal dripping device Download PDFInfo
- Publication number
- CN107436515B CN107436515B CN201710873199.2A CN201710873199A CN107436515B CN 107436515 B CN107436515 B CN 107436515B CN 201710873199 A CN201710873199 A CN 201710873199A CN 107436515 B CN107436515 B CN 107436515B
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- liquid crystal
- solid
- container
- particles
- dripping
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1341—Filling or closing of cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1341—Filling or closing of cells
- G02F1/13415—Drop filling process
Abstract
The invention provides a liquid crystal dripping device, and belongs to the technical field of display. The liquid crystal dripping device comprises a liquid crystal container, a conveying pipeline and a liquid crystal dripping nozzle, wherein the liquid crystal container is used for containing solid liquid crystal particles, and each solid liquid crystal particle has a fixed weight; the liquid crystal dripping nozzle is communicated with the liquid crystal container through the conveying pipeline and is used for sucking the solid liquid crystal particles from the liquid crystal container and dripping the solid liquid crystal particles onto a display substrate; the liquid crystal dropping device further includes: and a counter for counting the number of solid liquid crystal particles dropped from the liquid crystal dropping nozzle. The technical scheme of the invention can realize accurate control of the dropping amount of the liquid crystal with lower cost.
Description
Technical Field
The invention relates to the technical field of display, in particular to a liquid crystal dripping device.
Background
In recent years, with the development of TFT-LCD technology, the size of the liquid crystal display is also moving from medium size to both large size and small size, and the large size and small size liquid crystal display is also widely used. With the expansion of the application field of the liquid crystal display, people also put higher and higher requirements on key technical indexes such as response time, visual angle and the like of the liquid crystal display.
To achieve a fast response, the simplest approach is to make the box thickness smaller. In order to realize a wide viewing angle, various manufacturers mostly adopt multi-domain vertical alignment (MVA) and in-plane alignment (IPS) techniques. However, conventional vacuum infusion processes limit the application of these techniques. The vacuum filling process is to fill liquid crystal into the box by using capillary phenomenon and internal and external pressure difference. The smaller the cell thickness, the greater the liquid crystal flow resistance and the more difficult the liquid crystal injection. Meanwhile, the difficulty of injecting liquid crystal is also limited by the orientation and wettability of the PI film, and the film orientation of MVA technology and IPS technology is not favorable for injecting liquid crystal, which results in overlong liquid crystal injection time.
With the development of the technology, the liquid crystal dropping (ODF) process is gradually replacing the vacuum Filling process and is widely used in the production process of the liquid crystal display because the problems of the vacuum Filling process can be effectively overcome. The ODF process has the characteristics of few process steps, simple process, high utilization rate of liquid crystal materials, capability of realizing production automation and the like.
In the ODF process, the dropping amount of liquid crystal is one of the most important control parameters. Improper control of the amount of liquid crystal dropped easily causes problems such as liquid crystal leakage (LC Leak), low temperature Bubble (Cold Bubble), and poor uniformity of brightness of the liquid crystal display.
At present, liquid crystal is dripped by a device similar to a piston or a pump to suck liquid crystal out of a container, and the quality of the dripped liquid crystal is controlled by accurately controlling the movement distance of a piston rod. The technology has very precise requirement on the moving distance of the piston rod, has very high flatness on a container for absorbing liquid crystal, ensures that the piston rod moves the same distance every time, ensures that the dropped liquid crystal has the same quality, needs a high-precision balance to be verified at all times, has poor stability, needs to be frequently replaced, and has higher cost because high-precision components are easy to wear in the practical production use, and the dropping precision can be greatly reduced after the high-precision components are used for a period of time.
Disclosure of Invention
The invention aims to provide a liquid crystal dripping device which can realize accurate control of the dripping amount of liquid crystal at lower cost.
To solve the above technical problem, embodiments of the present invention provide the following technical solutions:
on one hand, the liquid crystal dripping device comprises a liquid crystal container, a conveying pipeline and a liquid crystal dripping nozzle, wherein the liquid crystal container is used for containing solid liquid crystal particles, and each solid liquid crystal particle has a fixed weight;
the liquid crystal dripping nozzle is communicated with the liquid crystal container through the conveying pipeline and is used for sucking the solid liquid crystal particles from the liquid crystal container and dripping the solid liquid crystal particles onto a display substrate;
the liquid crystal dropping device further includes:
and a counter for counting the number of solid liquid crystal particles dropped from the liquid crystal dropping nozzle.
Further, the liquid crystal dropping device further includes:
and the valve is arranged on the conveying pipeline.
Further, the liquid crystal dropping device further includes:
and the liquid crystal buffer container is communicated with the liquid crystal container and is used for conveying the solid liquid crystal particles into the liquid crystal container.
Further, the liquid crystal dropping device further includes:
and the solid liquid crystal inflow pipe is communicated with the liquid crystal buffer container and is used for inputting the solid liquid crystal particles into the liquid crystal buffer container.
Further, the solid liquid crystal particles are spherical or blocky.
Further, when the solid liquid crystal particles are spherical, the diameter of the liquid crystal dropping nozzle is equal to the diameter of the solid liquid crystal particles.
Further, the liquid crystal dropping device further includes:
and the pressure gas pipe is communicated with the liquid crystal buffer container and is used for inputting gas into the liquid crystal buffer container.
Further, the liquid crystal dropping device further includes:
and the air pump is connected with the pressure gas pipe.
Further, the liquid crystal dropping device further includes:
and the piston cavity is communicated with the liquid crystal buffer container, and a piston capable of reciprocating is arranged in the piston cavity.
Further, the counter is an infrared counter, an optical fiber counter or an ultrasonic counter.
The embodiment of the invention has the following beneficial effects:
in the scheme, solid liquid crystal particles with fixed mass are dripped, the solid liquid crystal particles are dripped on the display substrate, and the liquid crystal particles have fixed mass, so the quality of the dripped liquid crystal can be accurately controlled by controlling the number of the dripped liquid crystal particles through the counter, the requirement of the dripped liquid crystal on the high precision of a dripping device at normal temperature is solved, the liquid crystal with high precision requirement can be dripped by using a device with common precision, the use of high-precision components is reduced, the stability of the liquid crystal dripping device is improved, the cost of the liquid crystal dripping device is greatly reduced due to the removal of a high-precision balance and high-precision components, and the defects caused by inaccurate dripping quality are reduced.
Drawings
FIG. 1 is a schematic structural diagram of a liquid crystal dropping device according to an embodiment of the present invention.
Reference numerals
1 solid liquid crystal inflow tube
2 pressure gas pipe
3 liquid crystal buffer container
4 liquid crystal container
5 liquid crystal dripping nozzle
6 counter
7 solid liquid crystal particles
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention aims at the problems that in the prior art, the quality of liquid crystal dropping is controlled by accurately controlling the movement distance of a piston rod, the technology has very precise requirement on the movement distance of the piston rod, the requirement on a container for sucking the liquid crystal has very high flatness, the same distance of the piston rod movement every time is ensured, the quality of the dropped liquid crystal is the same, and a high-precision balance is required to be verified at any time.
The embodiment of the invention provides a liquid crystal dropping device, as shown in fig. 1, comprising a liquid crystal container 4, a conveying pipeline and a liquid crystal dropping nozzle 5, wherein the liquid crystal container 4 is used for containing solid liquid crystal particles 7, and each solid liquid crystal particle 7 has a fixed weight;
the liquid crystal dropping nozzle 5 is communicated with the liquid crystal container 4 through the conveying pipeline, and the liquid crystal dropping nozzle 5 is used for sucking the solid liquid crystal particles 7 from the liquid crystal container 4 and dropping the solid liquid crystal particles 7 onto a display substrate;
the liquid crystal dropping device further includes:
and a counter 6 for counting the number of solid liquid crystal particles 7 dropped by the liquid crystal dropping nozzle 5.
In the embodiment, solid liquid crystal particles 7 with fixed mass are dripped, the solid liquid crystal particles 7 are dripped on a display substrate, and the liquid crystal particles have fixed mass, so the quality of the dripped liquid crystal can be accurately controlled by controlling the number of the dripped liquid crystal particles through a counter 6, the requirement of the dripped liquid crystal on the high precision of a dripping device at normal temperature is solved, the liquid crystal with high precision requirement can be dripped by using a device with common precision, the use of high-precision components is reduced, the stability of the liquid crystal dripping device is improved, and the cost of the liquid crystal dripping device is greatly reduced and the defects caused by inaccurate dripping quality are reduced.
In the present embodiment, the solid liquid crystal particles 7 of fixed mass may be spherical or block-shaped, and of course, the solid liquid crystal particles 7 are not limited to these two shapes, and may be other shapes as long as the solid liquid crystal particles 7 each have a fixed mass. The solid liquid crystal particles 7 may be prepared by a liquid crystal manufacturer when providing raw materials, or may be prepared by processing liquid crystal into solid liquid crystal before the liquid crystal is purchased by a user, and the processing flow is the same as the current flow of processing liquid crystal into solid liquid crystal, and the liquid crystal with fixed quality is frozen into a sphere, block or other shapes. It is to be noted that, since the liquid crystal can be presented in a solid state only in a low-temperature environment, the liquid crystal dropping device of the present embodiment operates in a low-temperature environment in which the liquid crystal can be frozen into a solid state.
Further, the liquid crystal dropping device further includes:
and the valve is arranged on the conveying pipeline. Whether solid liquid crystal particles are dripped can be controlled by controlling the opening and closing of the valve, and when the solid liquid crystal particles are required to be dripped, the valve is opened to drip the solid liquid crystal particles; when the dripping of the solid liquid crystal particles is not needed, the valve is closed to stop the dripping of the solid liquid crystal particles.
Further, in order to avoid the impact of the externally conveyed solid liquid crystal particles 7 on the solid liquid crystal particles 7 in the liquid crystal container 4, the liquid crystal dropping device further includes:
and the liquid crystal buffer container 3 is communicated with the liquid crystal container 4 and is used for conveying solid liquid crystal particles 7 into the liquid crystal container 4. The liquid crystal buffer container 3 can directly receive the externally conveyed solid liquid crystal particles 7, store the received solid liquid crystal particles 7 and convey the stored solid liquid crystal particles 7 to the liquid crystal container 4.
Further, as shown in fig. 1, the liquid crystal dropping device further includes:
and a solid liquid crystal inflow pipe 1 communicated with the liquid crystal buffer container 3 and used for inputting the solid liquid crystal particles 7 into the liquid crystal buffer container 3. The processed solid liquid crystal particles 7 can be transferred to the liquid crystal buffer container 3 through the solid liquid crystal inflow pipe 1.
When the liquid crystal to be dropped is liquid crystal, the liquid crystal can be dropped from the liquid crystal dropping nozzle 5 by the gravity of the liquid crystal itself, and when the liquid crystal to be dropped is solid liquid crystal, the solid liquid crystal needs to be dropped from the liquid crystal dropping nozzle 5 by applying pressure from the outside.
In a specific embodiment, when the solid liquid crystal particles 7 are spherical, the diameter of the liquid crystal dropping nozzle 5 is equal to the diameter of the solid liquid crystal particles 7, so that the solid liquid crystal particles 7 cannot be dropped from the liquid crystal dropping nozzle 5 by only the gravity of the solid liquid crystal particles 7 themselves, and therefore, the liquid crystal dropping device further includes: and a pressure gas pipe 2 communicated with the liquid crystal buffer container 3 and used for inputting gas into the liquid crystal buffer container 3, wherein the pressure gas pipe 2 inputs gas into the liquid crystal buffer container 3, and the liquid crystal buffer container 3 is communicated with the liquid crystal container 4, so that the solid liquid crystal particles 7 can be dripped from the liquid crystal dripping nozzle 5 along with the increase of the pressure applied by the pressure gas pipe 2. When the dropping of the solid liquid crystal particles 7 is not required, the pressure gas pipe 2 may be controlled to stop the supply of the pressure gas or the suck-back, so that the solid liquid crystal particles 7 do not drop from the liquid crystal dropping nozzle 5 any more.
Further, in order to supply the gas to the pressure gas pipe 2, the liquid crystal dropping device further includes:
and an air pump connected to the pressure gas pipe 2.
Further, in addition to supplying the power for dropping to the solid liquid crystal particles 7 through the pressure gas pipe 2, the power for dropping to the solid liquid crystal particles 7 may be supplied by a piston, and the liquid crystal dropping apparatus further includes:
and the piston cavity is communicated with the liquid crystal buffer container 3, and a piston capable of reciprocating is arranged in the piston cavity. This makes it possible to replace the pressure gas supplied from the pressure gas pipe 2 with a piston and to replace the downward pressure generated by the gas with the downward thrust of the piston, so that the solid liquid crystal particles 7 are dropped from the liquid crystal dropping nozzle 5. The way of providing pressure with the piston enables more accurate and rapid pressure control than the way of providing pressure with the pressure gas pipe 2.
Specifically, the counter 6 may be an infrared counter, an optical fiber counter, or an ultrasonic counter, and of course, the counter 6 is not limited to the infrared counter, the optical fiber counter, or the ultrasonic counter, and may be another type of counter as long as it can count the solid liquid crystal particles 7 dropped by the liquid crystal dropping nozzle 5, and the counter 6 may be provided on the liquid crystal dropping nozzle 5 in order to accurately count the solid liquid crystal particles 7 dropped by the liquid crystal dropping nozzle 5.
Specifically, as shown in fig. 1, when the liquid crystal dropping device of the present invention is operated, the solid liquid crystal particles 7 are pressed into the liquid crystal container 4 by the gas pressure applied from the pressure gas pipe 2 and the gravity of the solid liquid crystal particles 7 through the solid liquid crystal inflow pipe 1, the diameter of the liquid crystal dropping nozzle 5 is equivalent to the diameter of the solid liquid crystal particles 7, so that the solid liquid crystal particles 7 cannot be dropped from the liquid crystal dropping nozzle 5 by the gravity of the liquid crystal particles 7 alone, the solid liquid crystal particles 7 can be dropped from the liquid crystal dropping nozzle 5 as the pressure applied from the pressure gas pipe 2 increases, an infrared counter, a fiber counter, or an ultrasonic counter is provided at the liquid crystal dropping nozzle 5, and when the number of the dropped solid liquid crystal particles 7 reaches a set number determined by the counter 6, the gas pressure in the pressure gas pipe 2 can be controlled to be decreased or sucked back, so that the solid liquid crystal particles 7 stop dripping. Of course, the entire operation of the liquid crystal dropping device is in a low-temperature environment in which the liquid crystal can be frozen into a solid state.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A liquid crystal dripping device comprises a liquid crystal container, a conveying pipeline and a liquid crystal dripping nozzle, and is characterized in that,
the liquid crystal container is used for containing solid liquid crystal particles, and each solid liquid crystal particle has a fixed weight;
the liquid crystal dripping nozzle is communicated with the liquid crystal container through the conveying pipeline, the liquid crystal dripping nozzle is used for sucking the solid liquid crystal particles from the liquid crystal container and dripping the solid liquid crystal particles onto a display substrate, the solid liquid crystal particles are spherical, and the caliber of the liquid crystal dripping nozzle is equal to the diameter of the solid liquid crystal particles;
the liquid crystal dropping device further includes:
and a counter for counting the number of solid liquid crystal particles dropped from the liquid crystal dropping nozzle.
2. The liquid crystal dropping device according to claim 1, further comprising:
and the valve is arranged on the conveying pipeline.
3. The liquid crystal dropping device according to claim 1, further comprising:
and the liquid crystal buffer container is communicated with the liquid crystal container and is used for conveying the solid liquid crystal particles into the liquid crystal container.
4. The liquid crystal dropping device according to claim 3, further comprising:
and the solid liquid crystal inflow pipe is communicated with the liquid crystal buffer container and is used for inputting the solid liquid crystal particles into the liquid crystal buffer container.
5. The liquid crystal dropping device according to claim 3, further comprising:
and the pressure gas pipe is communicated with the liquid crystal buffer container and is used for inputting gas into the liquid crystal buffer container.
6. The liquid crystal dropping device according to claim 5, further comprising:
and the air pump is connected with the pressure gas pipe.
7. The liquid crystal dropping device according to claim 3, further comprising:
and the piston cavity is communicated with the liquid crystal buffer container, and a piston capable of reciprocating is arranged in the piston cavity.
8. The liquid crystal dropping device according to claim 1, wherein said counter is an infrared counter, a fiber counter, or an ultrasonic counter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710873199.2A CN107436515B (en) | 2017-09-25 | 2017-09-25 | Liquid crystal dripping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710873199.2A CN107436515B (en) | 2017-09-25 | 2017-09-25 | Liquid crystal dripping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107436515A CN107436515A (en) | 2017-12-05 |
| CN107436515B true CN107436515B (en) | 2022-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710873199.2A Active CN107436515B (en) | 2017-09-25 | 2017-09-25 | Liquid crystal dripping device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1861406A (en) * | 2005-05-12 | 2006-11-15 | 精工爱普生株式会社 | Liquid cartridge, liquid ejection apparatus and liquid ejection control method |
| CN101498868A (en) * | 2008-01-28 | 2009-08-05 | 塔工程有限公司 | Liquid crystal coating apparatus |
| CN101806980B (en) * | 2006-10-27 | 2013-06-12 | 塔工程有限公司 | Liquid crystal dispensing apparatus |
| CN102116971B (en) * | 2009-12-31 | 2013-07-10 | 北京京东方光电科技有限公司 | Method and equipment for filling liquid crystal and equipment for preparing solid liquid crystal powder |
| CN104181732A (en) * | 2014-08-11 | 2014-12-03 | 深圳市华星光电技术有限公司 | Liquid crystal dropping device |
| CN105093711A (en) * | 2015-08-25 | 2015-11-25 | 武汉华星光电技术有限公司 | One drop fill apparatus and one drop fill method |
-
2017
- 2017-09-25 CN CN201710873199.2A patent/CN107436515B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1861406A (en) * | 2005-05-12 | 2006-11-15 | 精工爱普生株式会社 | Liquid cartridge, liquid ejection apparatus and liquid ejection control method |
| CN101806980B (en) * | 2006-10-27 | 2013-06-12 | 塔工程有限公司 | Liquid crystal dispensing apparatus |
| CN101498868A (en) * | 2008-01-28 | 2009-08-05 | 塔工程有限公司 | Liquid crystal coating apparatus |
| CN102116971B (en) * | 2009-12-31 | 2013-07-10 | 北京京东方光电科技有限公司 | Method and equipment for filling liquid crystal and equipment for preparing solid liquid crystal powder |
| CN104181732A (en) * | 2014-08-11 | 2014-12-03 | 深圳市华星光电技术有限公司 | Liquid crystal dropping device |
| CN105093711A (en) * | 2015-08-25 | 2015-11-25 | 武汉华星光电技术有限公司 | One drop fill apparatus and one drop fill method |
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| CN107436515A (en) | 2017-12-05 |
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