[0049] It is easy to understand that the liquid crystal dropping device and the dropping method thereof of the present invention have multiple implementation modes. The following specific embodiments and drawings are only used to illustrate the technical solutions of the present invention, and should not be regarded as all of the present invention or as a limitation or limitation to the technical solutions of the present invention.
[0050] 4 is a schematic diagram of the structure of the liquid crystal dropping device of the present invention. As shown in FIG. 4, the liquid crystal dropping device 100 of the present invention mainly includes a liquid crystal holding container 101, a liquid crystal supply container 102 and a waste liquid recovery container 103.
[0051] As shown in FIG. 4, the liquid crystal container 101 is a container with an inverted cone bottom structure. The resistance measuring instrument 106 is inserted into the liquid crystal container 101 through the upper part of the liquid crystal container 101 and is as close as possible to the bottom end of the inverted cone of the liquid crystal container 101, and is used to observe that the liquid crystal container 101 is about to drip into the liquid crystal panel Liquid crystal resistance (commonly used liquid crystal resistivity as a characterization quantity of liquid crystal purity, which reflects the amount of impurity ions in the liquid crystal. Generally, the resistivity of liquid crystal used in liquid crystal panels is about 10 13 Ω.cm) to ensure that the dripped liquid crystal is a high-purity liquid crystal, so that the liquid crystal dripped into the liquid crystal panel meets the corresponding basic requirements for liquid crystal purity. When the resistivity of the liquid crystal measured by the resistance measuring instrument 106 is lower than the predetermined dripping requirement, the control system (not shown) of the dripping device will issue an instruction to stop the dripping, and recycle the liquid crystal that does not meet the dripping requirements to waste.液 Recovery container 103.
[0052] At the same time, a first sensor 108 is provided at a lower position of a side wall of the inverted cone-shaped liquid crystal container 101 to monitor the remaining amount of liquid crystal in the liquid crystal container 101. When the liquid level of the liquid crystal in the liquid crystal container 101 is lower than the position where the first sensor 108 is located, the first sensor 108 will send a message to the control system (not shown) of the dripping device of the liquid crystal in the liquid crystal container 101. Sufficient warning information, so that the liquid crystal container 101 can be supplied or recharged in time.
[0053] The upper part of the liquid crystal container 101 is provided with a liquid crystal delivery pipe 113, a second air supply pipe 114 and a second duct 115. One end of the liquid crystal delivery tube 113 is connected to the bottom of the liquid crystal supply container 102, and the other end is connected to a part near the bottom of the liquid crystal container 101. When the first sensor 108 issues an alarm message indicating that the liquid crystal volume of the liquid crystal container 101 is insufficient, the control system (not shown) of the dripping device will issue a command to control the liquid crystal supply container 102 to supply the liquid crystal container 101 with liquid crystal.
[0054] In addition, the pipeline of the liquid crystal delivery pipe 113 is provided with a filter 105 and a valve assembly 127 that controls the on and off of the liquid crystal delivery pipe 113. When the valve assembly 127 is opened, the liquid crystal in the liquid crystal supply container 102 passes through the filter 105. It is input into the liquid crystal containing container 101, so that the impurity ions mixed in the liquid crystal can be filtered out, thereby providing the liquid crystal containing container 101 with high-purity liquid crystal.
[0055] Located at the lower side of the liquid crystal dropping end of the liquid crystal delivery pipe 113 and keeping a relatively close distance from the liquid crystal dropping end, a baffle 107 extending horizontally from the side wall of the liquid crystal container 101 is provided. When the liquid crystal is dripped from the liquid crystal delivery tube 113 into the liquid crystal container 101, the baffle 107 can ensure that the movement stroke of the liquid crystal in the liquid crystal container 101 is small, so that the liquid crystal will not splash when entering the liquid crystal container 101 .
[0056] The second air supply pipe 114 of the liquid crystal holding container 101 is connected to an air supply unit (not shown). When the liquid crystal is dripped, the valve assembly 122 is opened and an inert gas such as nitrogen (N 2 ) Etc. are charged into the space above the liquid crystal in the liquid crystal containing container 101, thereby playing a role of protecting the liquid crystal. In addition, a valve assembly 122 is provided in the pipeline of the second air supply pipe 114 for on-off control of the pipeline of the second air supply pipe 114. When the valve assembly 122 is opened, the air supply unit fills the liquid crystal container with inert gas. 101 in. A pressure relief valve 128 is also connected to the second air supply pipe 114. When the pressure in the liquid crystal container 101 is too high, the control system (not shown) of the dripping device will issue an instruction to open the pressure relief valve 128. The liquid crystal container 101 is pressure-relieved, so as to ensure the normal air pressure range in the liquid crystal container 101. The second conduit 115 of the liquid crystal container 101 is connected to the vacuum pump 104, and a valve assembly 121 is arranged in the pipeline of the second conduit 115 for on-off control of the second conduit 115. When the liquid crystal in the liquid crystal container 101 is mixed with bubbles or moisture, the control system (not shown) of the dripping device will open the valve assembly 121 in the pipeline of the second conduit 115, and the vacuum pump 104 will control the liquid crystal The liquid crystal in the container 101 is defoamed again, and air bubbles or moisture mixed in the liquid crystal are discharged from the liquid crystal container 101 through the second duct 115.
[0057] The bottom end of the liquid crystal container 101 is provided with a liquid crystal drop tube 116 which communicates with the liquid crystal container 101 and controls the on-off of the pipeline through the first valve assembly 123. The branch of the liquid crystal dropper 116 is also provided with a large number of outwardly extending liquid crystal dropping branch pipes 117, and each liquid crystal dropping branch pipe 117 is equipped with a pump and a dripper (neither shown), so that the liquid crystal dropper of the present invention The injection device can simultaneously inject into the liquid crystal panel through a plurality of liquid crystal dropping branch pipes 117, that is, the liquid crystal dropping device of the present invention only needs one liquid crystal container to provide instilled liquid crystal to multiple dropping branch pipes at the same time. This reduces the time required for liquid crystal dripping, thereby improving production efficiency.
[0058] As described above, when the amount of liquid crystal in the liquid crystal container 101 is insufficient, the control system (not shown) of the dripping device will open the valve assembly 127, thereby inputting the liquid crystal of the liquid crystal supply container 102 to the liquid crystal container through the liquid crystal delivery pipe 113 Container 101. The liquid crystal supply container 102 of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0059] Please continue to refer to FIG. 4, the liquid crystal supply container 102 contains a supply liquid crystal 110 and is connected to the first pipe 111 and the first air supply pipe 112. Wherein, the first conduit 111 is connected to the vacuum pump 104, and the pipeline of the first conduit 111 is provided with a valve assembly 125 for on-off control of the pipeline of the first conduit 111. When the valve assembly 125 is opened, the vacuum pump 104 defoams the liquid crystal 110 in the liquid crystal supply container 102, and discharges bubbles and moisture through the first duct 111, thereby eliminating the liquid crystal bubbles and moisture in the liquid crystal supply container 102 . The first air supply pipe 112 is connected to an air supply unit (not shown), and the pipeline of the first air supply pipe 112 is provided with a valve assembly 126 for controlling the on and off of the first air supply pipe 112.
[0060] A second sensor 109 is provided on the side wall near the bottom of the liquid crystal supply container 102 to monitor the remaining amount of liquid crystal in the liquid crystal supply container 102. In addition, the top end of the liquid crystal supply container 102 is also provided with a sealing cover 130 for ensuring sealing performance. By opening the sealing cover 130, liquid crystal can be added to the liquid crystal supply container 102. When the liquid level of the liquid crystal in the liquid crystal supply container 102 is lower than the position where the second sensor 109 is located, that is, when the remaining liquid crystal is insufficient, the control system (not shown) of the dripping device issues an alarm of insufficient liquid crystal in the supply container 102 At this time, the sealing cover 130 needs to be opened to add a sufficient amount of liquid crystal to the liquid crystal supply container 102. When a sufficient amount of liquid crystal is added, the control system (not shown) of the dripping device will issue an instruction to open the valve assembly 125 and defoam the liquid crystal 110 in the liquid crystal supply container 102 through the vacuum pump 104. After the defoaming process is completed, the control system (not shown) of the dripping device issues an instruction to close the valve assembly 125 and open the valve assembly 126 to fill the liquid crystal supply container 102 with an inert gas such as nitrogen.
[0061] In order to recover the liquid crystal that does not meet the requirements in the liquid crystal container 101 or the remaining liquid crystal after dripping is completed, the waste liquid recovery container 103 is connected to the liquid crystal container 101 through the liquid crystal dropper 116. In addition, a second valve assembly 124 is provided on the liquid crystal dropper 116 near the port of the waste liquid recovery container 103. When the resistance measuring instrument 106 in the liquid crystal container 101 detects that the liquid crystal in the liquid crystal container 101 does not meet the dripping requirements, the control system (not shown) of the dripping device will issue an instruction to open the first valve assembly 123 and the In the second valve assembly 124, the liquid crystal enters the waste liquid recovery container 101 through the liquid crystal dropper 116. When the liquid crystal dripping operation is completed, the control system (not shown) of the dripping device will also issue an instruction to open the second valve assembly 124, and close all the pumps in the pipelines of the liquid crystal dripping branch pipe 117, and the liquid crystal container 101 The remaining liquid crystal in the liquid crystal dropper 116 is also used to recover the waste liquid.
[0062] 5(a) and 5(b) show the flow chart of liquid crystal dropping by the liquid crystal dropping device of the present invention. Before the liquid crystal dripping device 100 of the present invention starts to work, all valve components are in a closed state.
[0063] First, the flow of liquid crystal dropping will be described with reference to FIG. 5(a).
[0064] In order to ensure that the liquid crystal dripped into the liquid crystal panel is the liquid crystal that meets the dripping requirements, the resistance of the liquid crystal is measured throughout the working process of the entire device, that is, in step S501, the liquid crystal is measured by the resistance measuring instrument 106. Put the resistance of the liquid crystal in the container 101.
[0065] In step S502, it is determined whether the resistance of the liquid crystal in the liquid crystal container 101 meets the dripping requirement.
[0066] If the liquid crystal satisfies the dripping requirements, the next step S503 is entered to detect the remaining amount of liquid crystal in the liquid crystal container 101 through the first sensor 108 in the liquid crystal container 101. Conversely, if the liquid crystal does not meet the dripping requirements, step S507 is performed to stop the operation of the entire device, and the first and second valve components 123 and 124 in the liquid crystal dropper 116 are opened to recover the liquid crystal in the liquid crystal container 101 .
[0067] In step S504, it is determined whether the remaining liquid crystal in the liquid crystal containing container 101 is sufficient.
[0068] If the remaining liquid crystal is sufficient, go to the next step S505, open the valve assembly 122 on the second air supply pipe 114, and fill the liquid crystal container 101 with an inert gas such as nitrogen. Otherwise, if the remaining liquid crystal is insufficient, step S516 is performed, the valve assembly 127 is opened, and the liquid crystal is supplied to the liquid crystal container 101 through the liquid crystal supply container 102.
[0069] In step S506, the first valve assembly 123 on the liquid crystal dropper 116 is turned on and the pump (not shown) in each liquid crystal dropper pipe 117 is activated to perform liquid crystal droplets on the liquid crystal panel.
[0070] As described above, when it is detected that the liquid crystal remaining in the liquid crystal container 101 is insufficient, the liquid crystal is supplied to the liquid crystal container 101 through the liquid crystal supply container 102. The flow of liquid crystal supply will be described below with reference to FIG. 5(b).
[0071] In order to ensure that there is always enough liquid crystal in the liquid crystal supply container 102 used for supplying liquid crystal to the liquid crystal container 101 during the working process of the device, the monitoring of the remaining amount of liquid crystal in the liquid crystal supply container 102 also runs through the entire working process. in.
[0072] In step S511, the remaining amount of liquid crystal in the liquid crystal supply container 102 is detected by the second sensor 109 in the liquid crystal supply container 102.
[0073] In step S512, it is determined whether the remaining liquid crystal in the liquid crystal supply container 102 is sufficient.
[0074] If the liquid crystal is sufficient, proceed directly to the next step S514, open the valve assembly 125 in the first conduit 111, and defoam the liquid crystal in the liquid crystal supply container 102 through the vacuum pump 104; then close the valve assembly 125 and open the first air supply pipe The valve assembly 126 on 112 fills the liquid crystal supply container 102 with an inert gas, such as nitrogen, which presses the liquid crystal to guide the liquid crystal in the liquid crystal supply container 102 to flow out. On the contrary, if the liquid crystal is insufficient, the process proceeds to step S513, the sealing cover 130 of the liquid crystal supply container 102 is opened, sufficient liquid crystal is added to the liquid crystal supply container 102, and the sealing cover 130 is closed after completion to ensure the sealing performance.
[0075] In step S515, it is determined whether liquid crystal needs to be supplied to the liquid crystal container 101.
[0076] If it is determined that it is necessary to supply liquid crystal to the liquid crystal container 101, step S516 is performed, the valve assembly 127 on the liquid crystal delivery pipe 113 is opened, and the liquid crystal supply container 102 supplies filtered liquid crystal to the liquid crystal container 101. If it is determined that there is no need to supply liquid crystal to the liquid crystal container 101, the process returns to step S515 to continue to determine whether to supply liquid crystal to the liquid crystal container 101.
[0077] It is easy to understand that, compared to the prior art, the present invention provides a liquid crystal supply container for supplying liquid crystal into the liquid crystal container. The bottom of the liquid crystal supply container is connected with the liquid crystal holding container through a liquid crystal delivery pipe and the on-off of the pipeline is controlled by a corresponding valve assembly; the liquid crystal supply container is provided with a first pipe connected to the vacuum pump and the liquid crystal in the liquid crystal supply container The upper space is used for defoaming the liquid crystal in the liquid crystal supply container; the liquid crystal supply container is also provided with a first air supply pipe connected between the air supply unit and the liquid crystal upper space in the liquid crystal supply container for use To provide an inert gas into the liquid crystal supply container. The invention also provides an independent waste liquid recovery container for the recovery of liquid crystal waste products.
[0078] In accordance with the above content, the present invention has multiple embodiments. For example, the bottom of the liquid crystal container 101 is designed as an ellipsoidal bottom, and the liquid crystal drop buffer unit in the liquid crystal container 101 is designed as a fine grid instead of the above The baffle in the embodiment, and so on. For those skilled in the art, the obvious modifications and changes made to the above embodiments according to the technical solutions of the present invention are all covered by the scope of the claims of the present invention.
[0079] With the liquid crystal dropping device and dropping method of the present invention, since the liquid crystal supply container is provided, when the liquid crystal remaining in the liquid crystal storage container is insufficient, the liquid crystal container can be supplied in time, which solves the previous limitations Due to the capacity of the liquid crystal container, it is necessary to repeatedly replace the liquid crystal container to meet the requirements of continuous operation of the production line and improve productivity. The design of the inverted cone bottom structure of the liquid crystal holding container reduces the width of the bottom, overcomes the problem of difficult and large margin in the prior art of monitoring the liquid crystal margin, and realizes the function of full utilization and cost saving. Moreover, multiple liquid crystal dripping branch pipes can realize the centralized liquid supply and simultaneous dripping of liquid crystal.
