CN117250783B - Integrated forming production process and application of liquid crystal display module - Google Patents
Integrated forming production process and application of liquid crystal display module Download PDFInfo
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- CN117250783B CN117250783B CN202311398191.7A CN202311398191A CN117250783B CN 117250783 B CN117250783 B CN 117250783B CN 202311398191 A CN202311398191 A CN 202311398191A CN 117250783 B CN117250783 B CN 117250783B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 229920002120 photoresistant polymer Polymers 0.000 claims abstract description 49
- 230000001360 synchronised effect Effects 0.000 claims abstract description 34
- 238000004140 cleaning Methods 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 238000007790 scraping Methods 0.000 claims abstract description 7
- 238000005530 etching Methods 0.000 claims abstract description 5
- 239000011521 glass Substances 0.000 claims description 108
- 239000000758 substrate Substances 0.000 claims description 105
- 238000000034 method Methods 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 15
- 238000000576 coating method Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 230000002950 deficient Effects 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 claims description 3
- 230000005684 electric field Effects 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 238000005286 illumination Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 238000010030 laminating Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000003292 glue Substances 0.000 description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 235000011121 sodium hydroxide Nutrition 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
Classifications
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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
- G02F1/1303—Apparatus specially adapted to the manufacture of LCDs
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Position Input By Displaying (AREA)
Abstract
An integrated forming production process of a liquid crystal display module comprises the following steps: (1) a synchronous cleaning step; (2) a synchronous scraping step; (3) a synchronous exposure step; (4) a synchronous development step; (5) a synchronous high-temperature treatment step; (6) a synchronous etching step; (7) a synchronous photoresist removing step; (8) synchronizing the cleaning steps again; (9) a synchronous test step. Also provided is a liquid crystal display module manufactured by the integrated forming production process. Through integrated into one piece technology, can enough guarantee the laminating precision of display module and touch module, can reduce the thickness of liquid crystal display module again on whole.
Description
Technical Field
The invention relates to the field of liquid crystal display, in particular to a production process of a liquid crystal display module with an integrated touch display function.
Background
With the increasing of display technology and information volume, the requirements of users on man-machine interaction of liquid crystal display screens are higher and higher. In the prior art, part of the liquid crystal display screen has no touch function. To add a touch module for the touch module, two display modules and touch modules produced by different production processes need to be attached by OCA glue. This kind of prior art is as shown in fig. 1, an LCD box of a liquid crystal display screen, including upper substrate glass 7 and lower substrate glass 7', seal fixed and fill liquid crystal material 2 through frame glue 3 between upper substrate glass 7 and the lower substrate glass 7', one side that upper substrate glass 4 kept away from liquid crystal material 2 sets up touch substrate 4, touch substrate 4 below sets up touch ITO layer 5 as the touch-control layer, touch ITO layer 5 is laminated with upper end face of upper substrate glass 7 through OCA glue 6, one side that upper substrate glass 7 is close to liquid crystal material 2 and one side that lower substrate glass 7' is close to liquid crystal material 2 set up respectively and show ITO layer 8 as touch-display layer. In the prior art, firstly, the production of the touch module cannot be synchronously completed in the production process of the display module, the production process needs to be completed step by step, and the display module and the touch module are produced independently, so that the production process is complicated; secondly, the laminating of touch module and display module can't guarantee sufficient precision, and can produce newton's ring when two module laminating equipment, therefore has influenced the yields.
The prior art also includes liquid crystal display modules using ITO display electrodes and touch electrode structures, such as CN206096690U, CN101713880a and CN205080539U, but these prior art also have the problems that the production process is complex due to non-integral molding process, the attaching precision cannot be ensured, and the overall thickness is increased due to the addition of unnecessary components.
For example, chinese patent document CN102778967A, CN202067048U discloses an LCD display and touch integrated sensing screen produced by using an automatic liquid crystal running line, which includes a first single-sided ITO substrate, a second single-sided ITO substrate, and a frame therebetween, wherein first and second display electrode layers, first and second alignment layers, a closed LCD cavity, first and second polarizers, and an LCD touch sensing electrode layer are etched on at least one ITO conductive layer of the first or second single-sided ITO substrate, respectively. According to the technical scheme, although the yield of the product is greatly improved, the film layer is greatly increased, so that the overall thickness is greatly increased, and on the other hand, the process step of etching the LCD touch sensing electrode layer on the ITO conductive layer is required to be independently added, so that the complexity of the process is greatly increased.
For example, chinese patent document CN102890356a discloses an LCD display touch-control all-in-one machine and a manufacturing method thereof, a touch screen sensing electrode is disposed on an upper surface of a liquid crystal box, an upper polarizer is disposed on an upper surface of the touch screen sensing electrode, a first LCD display electrode and a second LCD display electrode are disposed in the liquid crystal box, the liquid crystal box includes a first glass substrate and a second glass substrate, a frame is disposed therebetween, the touch screen sensing electrode is disposed on an upper surface of the first glass substrate, the first LCD display electrode is disposed on a lower surface of the first glass substrate, a first PI alignment layer is disposed on a lower surface of the first LCD display electrode, and a second LCD display electrode is disposed on an upper surface of the second glass substrate, in which the touch screen electrode is disposed on an upper surface of the first glass substrate.
For example, chinese patent document CN203433230U discloses a liquid crystal display with touch function, which includes an upper glass sheet and a lower glass sheet of double-sided ITO, the upper glass sheet is connected to a PFC flexible circuit, and the lower glass sheet is connected to a PIN. The scheme realizes the touch control function through the PFC circuit (possibly the pen error of the FPC circuit), and the related details of the circuit are not disclosed in the scheme.
However, in the prior art, there is no technical solution that does not have an external or embedded touch screen in a real sense, and can enable the touch module and the display module to be produced integrally at the same time, and the touch function is integrally formed.
Disclosure of Invention
In view of the technical problems existing in the prior art, the invention aims to provide the touch display integrated liquid crystal screen of the liquid crystal display module, which is integrated with the display module and the touch function, and has the advantages that the production of the touch module is completed simultaneously, the production process and the production process are simple, the production cost is low, the ITO layer is not required to be bonded by glue, the overall thickness of the LCD box is reduced, the bonding precision of the display module and the touch module can be ensured, and the touch display integrated liquid crystal screen and the production process thereof are integrated with the touch function.
In order to achieve the above object, according to one aspect of the present invention, there is provided an integrated manufacturing process of a liquid crystal display module, wherein the touch module is manufactured integrally with the display module, comprising the steps of:
(1) A synchronous cleaning step, namely cleaning upper and lower substrate glass: providing double-sided ITO conductive glass as upper substrate glass, single-sided ITO conductive glass as lower substrate glass, cleaning the surfaces of the upper substrate glass and the lower substrate glass by using a detergent and deionized water and adopting a physical and chemical method, and drying; the physical and chemical methods refer to conventional cleaning methods such as ultrasonic cleaning, sodium hydroxide cleaning, pure water cleaning, and the like, and cleaning various impurities, oil stains, and the like adhering to the surface of the substrate glass. (2) a synchronous photoresist scraping step, namely scraping and coating photoresist: coating photoresist on the upper surface of the upper substrate glass, the lower surface of the upper substrate glass and the upper surface of the lower substrate glass by adopting a photoresist doctor blade process; the photoresist doctor-blading process adopts a special doctor blade with an integrated doctor blade and photoresist feeding, so as to coat photoresist on the surface of the glass substrate.
(3) A synchronous exposure step, exposing the photoresist: irradiating the surface of the photoresist by ultraviolet rays through a prefabricated electrode mask plate (film), so that the photoresist layer of the irradiated part reacts, and simultaneously exposing the upper surface of the upper substrate glass, the lower surface of the upper substrate glass and the upper surface of the lower substrate glass; the ultraviolet rays are obtained by adopting a UV-365 ultraviolet curing device.
(4) A synchronous developing step, developing: treating the surfaces of the upper and lower substrate glass with a developing solution, removing the photoresist layer subjected to illumination decomposition, and reserving the photoresist layer of the unexposed part to form a display electrode or a touch electrode on the upper and lower substrate glass; the developing solution adopts traditional 0.1mol/L caustic soda.
(5) Synchronous high-temperature treatment step, photoresist curing: the photoresist layer is firmer by a high temperature treatment; the high temperature treatment temperature ranges from 80 degrees celsius to 130 degrees celsius.
(6) Synchronous etching, spraying: removing unnecessary ITO layers in the upper substrate glass and the lower substrate glass at one time by adopting an up-down spraying process; the spraying process adopts hydrochloric acid for spraying.
(7) Synchronous photoresist removing step, dissolving: removing the remaining photoresist with a protective effect by adopting a solvent; here, sodium hydroxide is used as the solvent.
(8) And (3) synchronously cleaning the upper and lower substrate glass again: cleaning the glass surfaces of the upper and lower substrates by adopting a physical and chemical method and drying; the physical and chemical methods described herein are the same as those described above, using conventional cleaning methods.
(9) Synchronous test, namely testing: the prepared liquid crystal display module is connected to a testing machine through a PCB circuit board, the touch key capacitance value formed on the liquid crystal display module is graphically displayed by adopting testing software, and whether a circuit is normal or not is judged to be used as a basis for detecting good products and bad products.
Preferably, the photoresist doctor blade process in step (2) includes the steps of: filling the photoresist in the bottle with a scraper groove through a servo pump, controlling the photoresist film thickness (usually 1600-2500 nanometers) according to the requirement through an equipment software program, uniformly forming a film by utilizing a scraper spacer, and then coating the film on the surfaces of upper substrate glass and lower substrate glass; and then pre-baking the photoresist diluent through an IR furnace to strengthen the adhesive force of the photoresist, the upper substrate glass and the lower substrate glass.
Preferably, the test in step (9) comprises the steps of: connecting a touch key formed on a liquid crystal display module (or a display screen) to a testing machine through a PCB, adopting testing software to graphically display a capacitance value of the touch key, and if the circuit is defective, the capacitance value is reduced, a display histogram is small, and if the limit value is not reached, a Pass is not displayed; and if the circuit is normal and the capacitance value is unchanged, displaying that the histogram reaches the limit value, and displaying Pass.
According to another aspect of the present invention, there is provided a liquid crystal display module manufactured by the above-mentioned integrated molding process, which includes, from top to bottom, a first ITO layer, an upper substrate glass, a second ITO layer, a liquid crystal material layer, a third ITO layer, and a lower substrate glass; the liquid crystal material layer is sealed and fixed in a frame (abbreviated as a glue frame) formed by frame glue between the upper substrate glass and the lower substrate glass, a first ITO layer on the upper side of the upper substrate glass is used as an ITO display layer, a third ITO layer on the upper side of the lower substrate glass is used as a touch electrode, a second ITO layer on the lower side of the upper substrate glass is used as a touch electrode and a display electrode, and the first ITO layer, the upper substrate glass, the second ITO layer, the liquid crystal material layer, the third ITO layer and the lower substrate glass are integrally formed.
Preferably, the first ITO layer, the second ITO layer, and the third ITO layer are bonded by a blanket exposure.
Preferably, the first ITO layer, the second ITO layer, and the third ITO layer are simultaneously bonded by registration exposure.
Preferably, the first ITO layer forms an ITO lead electrode as a touch key. When the ITO lead electrode is touched by a human hand, the capacitance value is changed by utilizing the induction principle of capacitance, so that a control signal is obtained.
Preferably, the second ITO layer and the third ITO layer each form an ITO lead electrode, and an induced electric field is formed between the ITO lead electrodes of the upper substrate glass and the lower substrate glass to control rotation of the liquid crystal material, thereby performing display.
Preferably, the first ITO layer, the second ITO layer and the third ITO layer are subjected to alignment exposure by a microscope to complete lamination.
The invention has the following technical effects:
(1) The display module and the touch module are produced by adopting an integrated forming process, an external or embedded touch screen is not needed, the production cost is effectively reduced by about 30%, and the production process is simplified;
(2) Because the first ITO layer, the second ITO layer and the third ITO layer are bonded in a sleeving exposure mode, the bonding precision of the display module and the touch module can be ensured even under the condition that no glue is used;
(3) On the premise of not affecting the using effect, the whole thickness of the liquid crystal display module is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a touch display LCD case according to the prior art.
Fig. 2 is a flowchart of an integrated manufacturing process of a liquid crystal display module according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an integrally formed lcd module according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a touch module of an integrated liquid crystal display module according to an embodiment of the invention.
Fig. 5 is a schematic diagram of a display module of an integrally formed lcd module according to an embodiment of the present invention.
Reference numerals:
In fig. 1: 1-PI layer, 2-space powder support, 3-frame glue, 4-touch substrate, 5-touch ITO, 6-bonding glue, 7-upper substrate glass, 7' -lower substrate glass, 8-display ITO layer,
In fig. 3: 1-PI layer, 2-liquid crystal material layer, 3-frame glue, 5-first ITO layer, 7-upper substrate glass, 7' -lower substrate glass, 8-second ITO layer, 9-third ITO layer.
Detailed Description
The following is a further description of embodiments of the present invention with reference to fig. 2-5:
fig. 2 is a flowchart of an integrated manufacturing process of a liquid crystal display module according to an embodiment of the present invention.
In this embodiment, the integrated production process of the liquid crystal display module includes the following steps: (1) a synchronous cleaning step: cleaning the surfaces of the upper substrate glass and the lower substrate glass by using a detergent and deionized water and adopting a physical and chemical method, and drying; (2) synchronous scraping step: coating photoresist on the upper surface of the upper substrate glass, the lower surface of the upper substrate glass and the upper surface of the lower substrate glass by adopting a photoresist doctor blade process; (3) a synchronous exposure step: irradiating the surface of the photoresist by using ultraviolet rays through a prefabricated electrode mask plate (film) to enable the photoresist layer of the irradiated part to react, and exposing the upper surface of the upper substrate glass, the lower surface of the upper substrate glass and the upper surface of the lower substrate glass at the same time; (4) a synchronous development step: treating the surface of the glass with a developing solution, removing the photoresist layer subjected to illumination decomposition, and reserving the photoresist layer of the unexposed part; (5) synchronous high-temperature treatment steps: the photoresist film layer is firmer by a high temperature treatment; (6) synchronous etching step: adopting an up-down spraying process to remove unnecessary photoresist in the upper substrate glass and the lower substrate glass at one time; (7) a synchronous glue removing step: removing the remaining photoresist with a protective effect by adopting a solvent; (8) a step of synchronously cleaning again: cleaning and drying the surfaces of the upper substrate glass and the lower substrate glass by adopting a physical and chemical method; (9) a synchronous test step: the touch key capacitance value is graphically displayed by adopting test software to serve as a basis for detecting good products and bad products.
Further, the photoresist doctor blade process in the step (2) includes the following steps: filling the photoresist in the bottle with a scraper groove through a servo pump, controlling by an equipment software program, uniformly forming a film according to the thickness of the photoresist, and coating the film on the surfaces of the upper substrate glass and the lower substrate glass through a scraper spacer; and then pre-baking the photoresist diluent through an IR furnace to strengthen the adhesive force of the photoresist, the upper substrate glass and the lower substrate glass.
Further, the test in step (9) comprises the steps of: connecting a touch key on a display screen to a testing machine through a PCB, adopting testing software to graphically display a capacitance value of the touch key, and if the circuit is defective, reducing the capacitance value, reducing a display histogram, and if the capacitance value does not reach a limit value, not displaying Pass; and if the circuit is normal and the capacitance value is unchanged, displaying that the histogram reaches the limit value, and displaying Pass.
Fig. 3 is a schematic structural diagram of an integrally formed lcd module according to an embodiment of the present invention.
The liquid crystal display module is manufactured by the integrated forming production process and comprises a first ITO layer 5, an upper substrate glass 7, a second ITO layer 8, a liquid crystal material layer 2, a third ITO layer 9 and a lower substrate glass 7' which are integrally formed from top to bottom; the liquid crystal material layer 2 is sealed and fixed between the upper substrate glass 7 and the lower substrate glass 7 'through the frame 3, the first ITO layer 5 on the upper side of the upper substrate glass 7 is used as an ITO display layer, the third ITO layer 9 on the upper side of the lower substrate glass 7' is used as a touch electrode, and the second ITO layer 8 on the lower side of the upper substrate glass (7) is used as a touch electrode and a display electrode.
Further, the first ITO layer 5, the second ITO layer 8, and the third ITO layer 9 are bonded by the blanket exposure. Because the first ITO layer 5, the second ITO layer 8 and the third ITO layer 9 are produced by adopting an integrated forming process, the production cost can be effectively reduced, and the production process is simpler and more convenient.
Further, the first ITO layer 5 forms an ITO lead electrode. When a human hand touches the first ITO lead electrode, the capacitance value changes by utilizing the capacitance induction principle, so that a control signal is obtained.
Further, the second ITO layer 8 and the third ITO layer 9 form ITO lead electrodes. An induced electric field is formed between the two lead electrodes, and the liquid crystal material can be controlled to change, so that display is performed.
Further, the first ITO layer 5, the second ITO layer 8, and the third ITO layer 9 are attached by microscopic alignment exposure. In this case, even in the case where any glue is not applied, the attaching accuracy of the display module and the touch module can be ensured, and even the attaching degree of the display module and the touch module can be further improved.
Further, the liquid crystal material layer 2 includes PI layers 1 on top and bottom.
FIG. 4 is a schematic diagram illustrating a touch module of an integrally formed LCD module according to an embodiment of the present invention; fig. 5 is a schematic diagram of a display module of an integrally formed lcd module according to an embodiment of the present invention. The touch keys K1 to K9 shown in fig. 4 are ITO lead electrodes formed on the upper substrate glass, and are electrically connected to corresponding pins through leads, respectively, so that capacitance changes are caused by touching the touch keys by a human hand to form a touch signal. The functional blocks S1-S27 shown in fig. 5 are illustrated as respective display functions such as time, power on, power off, etc. Those skilled in the art will appreciate that the patterned distribution is merely illustrative and that the present invention is not limited to this particular pattern. Under the condition of adopting the integrated forming process, the display module and the touch module can be integrally formed, and the thickness of the liquid crystal display module can be reduced as a whole.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been described in terms of the preferred embodiments, it should be understood that the present invention is not limited to the embodiments described above, and that various changes and modifications can be made by one skilled in the art without departing from the scope of the present invention.
Claims (1)
1. An integrated forming production process of a liquid crystal display module comprises the following steps:
and (3) synchronous cleaning: providing double-sided ITO conductive glass as upper substrate glass, single-sided ITO conductive glass as lower substrate glass, cleaning the surfaces of the upper substrate glass (7) and the lower substrate glass (7') and drying;
synchronous scraping: coating photoresist on the upper surface of the upper substrate glass, the lower surface of the upper substrate glass and the upper surface of the lower substrate glass; the photoresist scraping and coating process in the synchronous photoresist scraping step comprises the following steps: filling the photoresist in the bottle with a scraper groove through a servo pump, controlling by an equipment software program, uniformly forming a film according to the thickness of the photoresist, and coating the film on the surfaces of the upper substrate glass and the lower substrate glass through a scraper spacer; then pre-baking the photoresist diluent through an IR furnace to strengthen the adhesive force of the photoresist, the upper substrate glass and the lower substrate glass;
A synchronous exposure step: simultaneously exposing the upper surface of the upper substrate glass, the lower surface of the upper substrate glass and the upper surface of the lower substrate glass;
and (3) synchronous development: treating the surfaces of the upper and lower substrate glass with a developing solution, removing the photoresist layer subjected to illumination decomposition, and reserving the photoresist layer at the unexposed part to form display electrodes and/or touch electrodes on the upper and lower substrate glass;
Synchronous high-temperature treatment: the photoresist layer is firmer by a high temperature treatment;
Synchronous etching: adopting an up-down spraying process to remove unnecessary photoresist in the upper substrate glass and the lower substrate glass at one time;
synchronous photoresist removing step: removing the remaining photoresist with a protective effect by adopting a solvent;
and (3) synchronously cleaning again: cleaning and drying the glass surfaces of the upper and lower substrates;
And a synchronous test step: connecting the prepared liquid crystal display module to a testing machine through a PCB (printed circuit board), graphically displaying the capacitance value of a touch key formed on the liquid crystal display module, and judging whether a circuit is normal or not to be used as a basis for detecting good products and bad products; the testing in the synchronous testing step comprises the following steps: connecting a touch key on a display screen to a testing machine through a PCB, adopting testing software to graphically display a capacitance value of the touch key, and if the circuit is defective, reducing the capacitance value, reducing a display histogram, and if the capacitance value does not reach a limit value, not displaying Pass; the circuit is normal, the capacity value is unchanged, and if the display histogram reaches the limit value, pass is displayed;
The liquid crystal display module comprises a first ITO layer (5), an upper substrate glass (7), a second ITO layer (8), a liquid crystal material layer (2), a third ITO layer (9) and a lower substrate glass (7') which are integrally formed from top to bottom; the liquid crystal material layer (2) is sealed and fixed between the upper substrate glass (7) and the lower substrate glass (7') through the frame (3), the first ITO layer (5) forms an ITO lead electrode, when a human hand touches the first ITO lead electrode, a capacitance value changes by utilizing a capacitance induction principle, so that a control signal is obtained, the second ITO layer (8) and the third ITO layer (9) form an ITO lead electrode, an electric field is formed between the two lead electrodes, and the change of the liquid crystal material can be controlled, so that display is performed;
The upper part and the lower part of the liquid crystal material layer (2) also comprise PI layers (1);
The first ITO layer (5), the second ITO layer (8) and the third ITO layer (9) are synchronously bonded through sleeving exposure.
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| CN202311398191.7A CN117250783B (en) | 2023-10-26 | 2023-10-26 | Integrated forming production process and application of liquid crystal display module |
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| CN202311398191.7A CN117250783B (en) | 2023-10-26 | 2023-10-26 | Integrated forming production process and application of liquid crystal display module |
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| CN117250783B true CN117250783B (en) | 2024-06-11 |
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