Drying detection process and device for LCD (Liquid Crystal Display)

Abstract

The invention discloses an LCD (liquid crystal display) drying detection process and device, and belongs to the field of LCD drying detection, the LCD drying detection process and device comprise the following processes: S1, array manufacturing: manufacturing a TFT (thin film transistor) array on a glass substrate, and controlling the switch of each pixel; s2, a box forming process is conducted, specifically, the TFT substrate and the CF color filter substrate are attached in an aligned mode, and liquid crystals are injected into the TFT substrate and the CF color filter substrate; s3, module assembly: integrating a driving circuit, a backlight module and the like to complete a display function; compared with the prior art, the method has the advantages that short circuit and other losses caused by incomplete drying in the electricity testing detection process after product assembly can be reduced through the technology, meanwhile, tedious manual detection is replaced, meanwhile, the device is full-automatic in the detection process, detection errors caused by manual touch are avoided, and the detection efficiency is improved when an undried product is detected. In addition, the device is ingenious in arrangement, convenient to operate and high in practicability.

Description

Technical Field

[0001] This invention belongs to the field of LCD drying and testing technology, specifically relating to an LCD drying and testing process and apparatus. Background Technology

[0002] LCD, or liquid crystal display, consists of a certain number of colored or black-and-white pixels placed in front of a light source or reflector. LCDs have very low power consumption, making them popular among engineers and suitable for battery-powered electronic devices. Their main principle is to use electric current to stimulate liquid crystal molecules to produce dots, lines, and surfaces, which, together with a backlight, form an image.

[0003] LCD displays require drying during production. After drying, the LCD products need to undergo drying inspection before assembly. This is to prevent incomplete drying or water droplets from adhering to the LCD surface during transport, which could cause short circuits during assembly and reduce yield. Currently, most manufacturers do not use drying inspection, and a few use manual inspection. However, manual inspection is labor-intensive and cumbersome. Therefore, a drying inspection process and device for LCDs have been developed. Summary of the Invention

[0004] The purpose of this invention is to provide an LCD drying and inspection process and apparatus to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a process and apparatus for LCD drying and testing, comprising the following processes: Step S1: Array fabrication: fabricating a TFT thin-film transistor array on a glass substrate and controlling the switching of each pixel; Step S2: Cell assembly: aligning and bonding the TFT substrate with a CF color filter substrate and injecting liquid crystal; Step S3: Module assembly: integrating driving circuits, backlight modules, etc., to complete the display function; Step S4: Cleaning and drying: cleaning and drying the product, and after drying, using a robotic arm to install the dried LCD product on an LCD fixed tray and transport it out; Step S5: Drying and testing: installing the LCD fixed tray in the testing rack of the LCD drying and testing apparatus, and using the LCD drying and testing apparatus to test the product for drying, rejecting incompletely dried products to prevent short circuit damage during power-on testing; Step S6: Performance testing: performing power-on testing on the LCD product to test its display quality, electrical performance, function, reliability, and other indicators, and rejecting defective products; Step S7: Packaging: packaging the tested products.

[0006] Preferably, the LCD drying and testing device includes: a housing and LCD testing components. An inner support plate is fixedly connected inside the housing. The inner support plate has a Y-shaped groove. The Y-shaped groove is Y-shaped. A control shaft is rotatably connected inside the inner support plate. A driven gear and a turntable are fixedly connected to both ends of the control shaft, respectively. A drive motor is provided inside the housing. A drive gear is driven and connected to the drive motor. The drive gear meshes with the driven gear. A first rotating shaft is fixedly connected to the turntable. A first support rod is rotatably connected to the first rotating shaft. A second support rod is rotatably connected to the end of the first support rod away from the first rotating shaft. A first slider is rotatably connected to the end of the second support rod away from the first support rod. The first slider is rotatably connected to a fixed block. A second slider is provided on the fixed block. Both the first and second sliders are slidably connected in the Y-shaped groove. A testing frame is fixedly connected to the fixed block. A guide rail is provided inside the testing frame. An LCD fixing tray is slidably connected in the guide rail. Multiple LCD testing components are installed on the LCD fixing tray.

[0007] Preferably, the top of the housing is provided with a control console, which is equipped with a display and an operating panel. The housing contains multiple air slots, each with a slidably connected limit piston block. Each limit piston block corresponds one-to-one with an LCD detection element. A spring is provided within each air slot, with its two ends fixedly connected to the limit piston block and the inner wall of the air slot, respectively. Each air slot has an air guide chamber connected to both sides, and each air guide chamber has a detection tape connected to its outer side. Two detection tapes are symmetrically arranged along the air slots and match the LCD detection elements. Each of the aforementioned detection reels is equipped with a support airbag, and the air guide cavity is specifically connected to the support airbag within the detection reel. Spring steel wires are embedded on both sides of each support airbag, and the spring steel wires are naturally curled. Detection wires are embedded within the detection reel, and multiple detection contacts are provided on the inner surface of the detection reel. Each detection contact is electrically connected to the detection wire. A control chip is provided within the operating table, and the detection contacts are electrically connected to the control chip via the detection wire. The control chip is electrically connected to the display, and the drive motor is electrically connected to the operating table.

[0008] The technical effects and advantages of this invention are as follows: This process can reduce losses such as short circuits caused by incomplete drying during the post-assembly electrical testing process, while replacing the tedious manual testing. In addition, the testing process of this device is fully automated, avoiding testing errors caused by manual touch. When undried products are detected, they are displayed synchronously on the display screen. Moreover, the device is ingeniously designed, easy to operate, and highly practical. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure in the idle state of the present invention; Figure 2This is a schematic diagram of the feeding process of the present invention; Figure 3 This is a schematic diagram of the detection process of the present invention; Figure 4 This is a schematic diagram of the internal support plate structure of the present invention; Figure 5 This is a top view of the invention in its idle state; Figure 6 This is a top view of the detection state of the present invention; Figure 7 For the present invention Figure 5 Enlarged view of part A in the middle; Figure 8 For the present invention Figure 6 Enlarged view of part B in the middle section; Figure 9 This is a schematic diagram of the distribution of the detection wires in this invention; Figure 10 This is a schematic diagram of the detection contact distribution of the present invention; Figure 11 This is a cross-sectional view of the detection of the coiled state of the tape according to the present invention; Figure 12 This is a cross-sectional view of the tape inflation state detected by the present invention; Figure 13 This is a cross-sectional view of the detection tape of the present invention.

[0010] In the diagram: 101, housing; 102, inner support plate; 103, control console; 104, display; 105, operating table; 106, control shaft; 107, turntable; 108, Y-shaped slide; 109, first rotating shaft; 201, first support rod; 202, second support rod; 203, first slider; 204, second slider; 205, fixing block; 206, detection frame; 207, LCD fixing tray; 208, LCD detection component; 209, air groove; 301, limiting piston block; 302, spring; 303, air guide chamber; 304, detection tape; 305, drive motor; 306, drive gear; 307, driven gear; 308, detection wire; 309, detection contact point; 401, support airbag; 402, spring steel wire. Detailed Implementation

[0011] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0012] This invention provides, for example Figure 1-13The illustrated LCD drying and testing process and apparatus include the following steps: Step S1: Array fabrication: Fabricating a TFT thin-film transistor array on a glass substrate to control the switching of each pixel; Step S2: Cell assembly: Aligning and bonding the TFT substrate with a CF color filter substrate, and injecting liquid crystal; Step S3: Module assembly: Integrating the driving circuit, backlight module, etc., to complete the display function; Step S4: Cleaning and drying: Cleaning and drying the product, and after drying, using a robotic arm to install the dried LCD product on an LCD fixing tray 207 for transport; Step S5: Drying and testing: Installing the LCD fixing tray 207 in the testing rack 206 within the LCD drying and testing apparatus, and performing drying and testing on the product using the LCD drying and testing apparatus to reject incompletely dried products and prevent short circuit damage during power-on testing; Step S6: Performance testing: Performing power-on testing on the LCD product to test its display quality, electrical performance, function, reliability, and other indicators, and rejecting defective products; Step S7: Packaging: Packaging the tested products. Specifically, the LCD drying and detection device includes: a housing 101 and an LCD detection component 208. An inner support plate 102 is fixedly connected inside the housing 101. A Y-shaped groove 108 is provided on the inner support plate 102. The Y-shaped groove 108 is Y-shaped. A control shaft 106 is rotatably connected inside the inner support plate 102. A driven gear 307 and a turntable 107 are fixedly connected to both ends of the control shaft 106, respectively. A drive motor 305 is provided inside the housing 101. A drive gear 306 is driven and connected to the drive motor 305. The drive gear 306 meshes with the driven gear 307. A first rotating shaft 109 is fixedly connected to the turntable 107. The first rotating shaft 109 rotates... A first support rod 201 is rotatably connected to the first support rod 201. A second support rod 202 is rotatably connected to the end of the first support rod 201 away from the first support rod 201. A first slider 203 is rotatably connected to the end of the second support rod 202 away from the first support rod 201. The first slider 203 is rotatably connected to a fixed block 205. A second slider 204 is provided on the fixed block 205. Both the first slider 203 and the second slider 204 are slidably connected in a Y-shaped groove 108. A detection frame 206 is fixedly connected to the fixed block 205. A guide rail is provided in the detection frame 206. An LCD fixed tray 207 is slidably connected in the guide rail. Multiple LCD detection components 208 are installed on the LCD fixed tray 207.

[0013] Specifically, the top of the housing 101 is provided with a control console 103, which is equipped with a display 104 and an operating panel 105. The housing 101 contains multiple air slots 209, each with a slidably connected limit piston block 301. Each limit piston block 301 corresponds one-to-one with an LCD detection element 208. A spring 302 is provided within each air slot 209, with its two ends fixedly connected to the limit piston block 301 and the inner wall of the air slot 209, respectively. Each air slot 209 has a guide air chamber 303 connected to both sides, and each guide air chamber 303 has a detection tape 304 connected to its outer side. The two detection tapes 304 are symmetrically arranged along the air slots 209 and correspond to the LCD detection elements 208. Each detection roll 304 is equipped with a support airbag 401. The air guide cavity 303 is specifically connected to the support airbag 401 in the detection roll 304. Spring steel wires 402 are embedded on both sides of the support airbag 401. The spring steel wires 402 are naturally curled. Detection wires 308 are embedded in the detection roll 304. Multiple detection contacts 309 are provided on the inner surface of the detection roll 304. Each detection contact 309 is electrically connected to the detection wire 308. A control chip is provided in the operating table 105. The detection contacts 309 are electrically connected to the control chip through the detection wires 308. The control chip is electrically connected to the display 104. The drive motor 305 is electrically connected to the operating table 105.

[0014] Working principle: When using the device, the operator installs the LCD fixing tray 207 with the LCD detection component 208 installed into the detection frame 206. The operator then starts the drive motor 305 via the control panel 105. The drive motor 305 drives the drive gear 306 to rotate counterclockwise, which in turn drives the driven gear 307 to rotate clockwise, causing the turntable 107 to rotate clockwise. This means the first rotating shaft 109 rotates clockwise along the turntable 107. Simultaneously, the first rotating shaft 109, through the first support rod 201 and the second support rod 202, pulls the first slider 203 on the fixing block 205 along the arc-shaped track at the end of the Y-shaped groove 108 until the first slider 203 and the second slider 204 are on the same track. At this point, the fixing block 205 rotates counterclockwise along the Y-shaped groove 108, thus fixing the device to the ground. The detection frame 206 on the fixed block 205 rotates counterclockwise. As the turntable 107 continues to rotate, the first rotating shaft 109 continues to pull the first slider 203 to the left. At this time, the first slider 203 and the second slider 204 move horizontally to the left along the Y-shaped slide groove 108. At this time, the detection frame 206 drives the LCD detection component 208 to move to the left. At this time, the LCD detection component 208 abuts against the upper limit piston block 301 on the side wall of the housing 101 and pushes the limit piston block 301 to move to the left along the air groove 209. At this time, the gas in the air groove 209 enters the support air bladder 401 in the detection roll 304 on both sides along the air guide chambers 303 on both sides. At this time, the support air bladder 401 is inflated and straightened, that is, the detection roll 304 is attached to the LCD detection component 208 and unfolded. At this time, the surface of the LCD detection component 208 is dried and tested. When moisture exists between any two detection contacts 309 on the detection tape 304, a circuit is formed between the two detection contacts 309, and the detection lead 308 is electrically connected to the control chip. The control chip alarms, and simultaneously displays the location information of the defective product on the display 104. After the detection is completed, the control chip controls the drive motor 305 to rotate clockwise. At this time, the turntable 107 rotates counterclockwise. That is, the first rotating shaft 109 on the turntable 107 pushes the first slider 203 to the right through the first support rod 201 and the second support rod 202. At this time, the detection frame 206 moves to the right and disengages from the detection position. At the same time, the limit switch in the air groove 209 is activated. The stopper 301 moves to the right and resets under the action of the spring 302. At the same time, the gas in the support airbag 401 in the detection tape 304 flows back to the air groove 209 under the synchronous action of the spring wire 402 and the spring 302, that is, the detection tape 304 is curled and reset. When the second slider 204 moves to the right to the maximum position, the second slider 204 locks, and the first slider 203 slides along the arc track in the Y-shaped slide groove 108. At this time, the fixing block 205 rotates clockwise, that is, the detection frame 206 rotates clockwise and resets. At this time, the operator removes the LCD fixing tray 207 and removes the defective products according to the markings on the display 104.

[0015] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A process and apparatus for testing LCD drying, characterized in that: Including the following processes: Step S1: Array fabrication: Fabricate a TFT thin-film transistor array on a glass substrate to control the switching of each pixel; Step S2: Cell assembly process: Align and bond the TFT substrate with the CF color filter substrate, and inject liquid crystal; Step S3: Module assembly: Integrate the driving circuit, backlight module, etc., to complete the display function; Step S4: Cleaning and drying: Clean and dry the product. After drying, the dried LCD product is installed on the LCD fixed tray (207) by a robotic arm and transported out. Step S5: Drying test: Install the LCD fixed tray (207) in the test rack (206) inside the LCD drying test device, and perform drying test on the product through the LCD drying test device to remove products that are not completely dried to prevent short circuit damage during power-on test; Step S6: Performance testing: Conduct power-on testing on the LCD products to test their display quality, electrical performance, functions, reliability, and other indicators, and eliminate defective products; Step S7: Packaging: Pack the tested products.

2. The LCD drying and testing process and apparatus according to claim 1, characterized in that: The LCD drying and testing device includes: a housing (101) and an LCD testing component (208). An inner support plate (102) is fixedly connected inside the housing (101). A Y-shaped groove (108) is provided on the inner support plate (102). The Y-shaped groove (108) is Y-shaped. A control shaft (106) is rotatably connected inside the inner support plate (102). A driven gear (307) and a turntable (107) are fixedly connected to both ends of the control shaft (106). A drive motor (305) is provided inside the housing (101). A drive gear (306) is driven and connected to the drive motor (305). The drive gear (306) meshes with the driven gear (307). A first rotating shaft (109) is fixedly connected to the turntable (107). The first rotating shaft (109) rotates... A first support rod (201) is connected, and a second support rod (202) is rotatably connected to the end of the first support rod (201) away from the first rotating shaft (109). A first slider (203) is rotatably connected to the end of the second support rod (202) away from the first support rod (201). The first slider (203) is rotatably connected to a fixed block (205). A second slider (204) is provided on the fixed block (205). The first slider (203) and the second slider (204) are slidably connected in a Y-shaped groove (108). A detection frame (206) is fixedly connected to the fixed block (205). A guide rail is provided in the detection frame (206). An LCD fixed tray (207) is slidably connected in the guide rail. Multiple LCD detection components (208) are installed on the LCD fixed tray (207).

3. The LCD drying and testing process and apparatus according to claim 2, characterized in that: The top of the housing (101) is provided with a control console (103), on which a display (104) and an operating table (105) are provided. The housing (101) is provided with multiple air slots (209), and each air slot (209) is slidably connected with a limiting piston block (301). The limiting piston block (301) corresponds one-to-one with the LCD detection element (208). A spring (302) is provided in each air slot (209), and the two ends of the spring (302) are respectively fixedly connected to the limiting piston block (301) and the inner wall of the air slot (209). Each air slot (209) is connected to an air guide chamber (303) on both sides. Each air guide chamber (303) is connected to a detection tape (304) on the outside. The two detection tapes (304) are symmetrically arranged along the air slot (209) and are connected to the LCD detection element (208). Matching each of the detection rolls (304) is provided with a support airbag (401), and the air guide cavity (303) is specifically connected to the support airbag (401) in the detection roll (304). Spring steel wires (402) are embedded on both sides of the support airbag (401). The spring steel wires (402) are naturally curled. Detection wires (308) are embedded in the detection roll (304). Multiple detection contacts (309) are provided on the inner surface of the detection roll (304). Each detection contact (309) is electrically connected to the detection wire (308). A control chip is provided in the operating table (105). The detection contacts (309) are electrically connected to the control chip through the detection wires (308). The control chip is electrically connected to the display (104). The drive motor (305) is electrically connected to the operating table (105).

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