CN113391474A - Heating equipment of display module - Google Patents
Heating equipment of display module Download PDFInfo
- Publication number
- CN113391474A CN113391474A CN202110718585.0A CN202110718585A CN113391474A CN 113391474 A CN113391474 A CN 113391474A CN 202110718585 A CN202110718585 A CN 202110718585A CN 113391474 A CN113391474 A CN 113391474A
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- Prior art keywords
- heating
- sub
- groove
- heating element
- display module
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 206
- 239000002184 metal Substances 0.000 claims description 17
- 230000004913 activation Effects 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 12
- 230000032683 aging Effects 0.000 abstract description 7
- 230000008859 change Effects 0.000 description 6
- 239000003292 glue Substances 0.000 description 5
- 238000005485 electric heating Methods 0.000 description 3
- 239000000565 sealant Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The embodiment of the invention discloses heating equipment of a display module; the heating equipment comprises a machine table for bearing the display module and at least one closed-loop heating element, wherein one side of the bearing surface of the machine table comprises at least one closed-loop groove, the heating element is positioned in the groove, and the top surface of the heating element is flush with the bearing surface. The heating equipment for the display module, provided by the invention, is provided with the closed-loop heating element, so that the heating element only heats the rubber frame area of the display module, the power consumption is low, the temperature rise is fast, the operation is easy, and the aging risk of the liquid crystal display panel after the reworking can be reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to heating equipment of a display module.
Background
The existing frame-pasted display screen mainly comprises 65-inch, 75-inch, 86-inch and other large-size products, an SCA glue frame pasting mode is adopted, the yield in the manufacturing process is always a difficult-to-break barrier, defective products need to be disassembled, and parts need to be recycled. The disassembly scheme in the current market is mainly divided into a hot wire-disconnecting cutting and freezing separation scheme, wherein a heating device in the hot wire-disconnecting cutting scheme adopts a whole-surface heating scheme, and a whole-surface heating display screen is high in power consumption and slow in temperature rise, and is easy to cause aging of a liquid crystal panel, so that the defects of painting and other defects are caused.
Disclosure of Invention
The embodiment of the invention provides heating equipment for a display module, which aims to solve the technical problems of high power consumption and ageing of a liquid crystal panel caused by the adoption of a whole-surface heating scheme in the conventional heating equipment.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the embodiment of the invention provides heating equipment for a display module, which comprises a machine table for bearing the display module and at least one closed-loop heating element; wherein, bearing surface one side of board includes the recess of an at least closed loop, the heating member is located in the recess, just the top surface of heating member with the bearing surface parallel and level.
In some embodiments of the present invention, any of the heating elements comprises a plurality of sub-heating strips connected end to end in sequence, and the temperature of any of the sub-heating strips is controlled by an independent temperature control system.
In some embodiments of the present invention, any one of the heating members includes first, second, third, and fourth sub-heating strips connected end to end, the first sub-heating strip being disposed opposite to the third sub-heating strip, and the second sub-heating strip being disposed opposite to the fourth sub-heating strip.
In some embodiments of the present invention, the first sub-heating bar, the second sub-heating bar, the third sub-heating bar and the fourth sub-heating bar correspond to one temperature control system, respectively.
In some embodiments of the present invention, the heating apparatus includes a first heating member, a second heating member surrounding the first heating member, and a third heating member surrounding the second heating member, one side of the carrying surface of the machine table includes a first groove, a second groove surrounding the first groove, and a third groove surrounding the second groove, the first heating member is located in the first groove, the second heating member is located in the second groove, and the third heating member is located in the third groove.
In some embodiments of the present invention, the groove is wound along an edge of the machine table, and a width of the groove is greater than a width of the heating element.
In some embodiments of the present invention, any of the sub-heating strips has a telescopic structure, and any of the sub-heating strips can slide in the groove.
In some embodiments of the invention, the heating apparatus further comprises a driving member for driving the sub heating bar to slide.
In some embodiments of the present invention, the sub-heating strip includes a metal sleeve and a heating wire inside the metal sleeve.
In some embodiments of the invention, at least two independent activation switches are provided with any one of the heating members.
The invention has the beneficial effects that: the heating equipment for the display module, provided by the invention, is provided with the closed-loop heating element, so that the heating element only heats the rubber frame area of the display module, the power consumption is low, the temperature rise is fast, the operation is easy, and the aging risk of the liquid crystal display panel after the reworking can be reduced.
Drawings
Fig. 1 is a schematic structural diagram of a heating apparatus of a display module according to an embodiment of the present invention;
FIG. 2 is a schematic top view of a machine according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a heating element according to an embodiment of the present invention;
FIG. 4 is a schematic view of the structure of FIG. 2 taken along section A-A;
FIG. 5 is a schematic top view of a machine according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a sub-heating strip according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
Referring to fig. 1 and 2, the present invention provides a heating apparatus 100 for a display module, including a machine 10 for supporting the display module and at least one closed-loop heating element 20, wherein one side of a supporting surface 11 of the machine 10 includes at least one closed-loop groove 30, the heating element 20 is located in the groove 30, and a top surface of the heating element 20 is flush with the supporting surface, so that when the display module is heated to soften frame glue, the top surface of the heating element 20 can be sufficiently contacted with the display module for heating. Compared with the whole-surface heating device in the prior art, the heating device 100 provided by the embodiment of the invention has the advantages of low power consumption, quick temperature rise and capability of reducing the risk of aging of the liquid crystal panel after reworking.
The display module can be a liquid crystal display module, and the shape and the size of the heating element 20 are the same as those of the frame glue of the display module, so that the heating element 20 only heats the area where the frame glue of the display module is located, and the influence on the liquid crystal characteristics caused by heating other areas of the display module is avoided.
Taking a rectangular frame adhesive as an example, correspondingly, the heating element 20 is a rectangular ring. The heating member is including a plurality of sub-heating strips of end to end in proper order, and is a plurality of the temperature of sub-heating strip is controlled by a plurality of independent temperature control system respectively, carries out independent control to the temperature of arbitrary sub-heating strip promptly to reach the frame of different positions and to the demand of temperature and the accurate nature of temperature control.
Referring to fig. 3, taking a rectangular frame adhesive as an example, correspondingly, the heating element 20 is in a rectangular ring shape, the heating element 20 includes a first sub-heating strip 201, a second sub-heating strip 202, a third sub-heating strip 203 and a fourth sub-heating strip 204 which are connected end to end, the first sub-heating strip 201 and the third sub-heating strip 203 are disposed opposite to each other, and the second sub-heating strip 202 and the fourth sub-heating strip 204 are disposed opposite to each other. References to "connected" in embodiments of the present invention refer to contact connections, not electrical connections.
The first sub-heating strip 201, the second sub-heating strip 202, the third sub-heating strip 203, and the fourth sub-heating strip 204 correspond to one of the temperature control systems, respectively. An electronic display instrument panel 40 of the temperature control system is arranged on the side wall of the heating device 100, so that the temperature display is more intuitive.
Referring to fig. 1, at least two independent activation switches 50 may be provided on any one of the heating elements 20 to prevent accidental touching and to activate the heating apparatus 100. In the embodiment of the present invention, the heating element 20 is configured with two independent activation switches 50, and the heating apparatus 100 is activated only when the two activation switches 50 are simultaneously turned on, and the corresponding heating element 20 is heated.
Referring to fig. 1 and 2, in order to adapt to heating of display modules with different sizes, the heating apparatus 100 according to an embodiment of the present invention may include three heating members 20, i.e., a first heating member 21, a second heating member 22, and a third heating member 23. Wherein the second heating member 22 surrounds the first heating member 21, and the third heating member 23 surrounds the second heating member 22. The size of first heating member 21 can correspond to 65 cun display module assembly, the size of second heating member 22 can correspond to 75 cun display module assembly, the size of third heating member 23 can correspond to 86 cun display module assembly.
In some embodiments of the present invention, referring to fig. 1, correspondingly, one side of the carrying surface 11 of the machine 10 includes a first groove 31, a second groove 32 surrounding the first groove 31, and a third groove 33 surrounding the second groove 32. The first heating members 21 are located in the first recess 31, the second heating members 22 are located in the second recess 32, and the third heating members 23 are located in the third recess 33.
Referring to fig. 4, fig. 4 is a schematic structural view of a section a-a in fig. 2. In a typical display module, the lcd panel 211 is attached to the cover plate 213 via sealant 212. When the display module needs to be subjected to hot wire removal, one side of the cover plate 213 is placed on the bearing surface 11 of the machine table 10, the starting switch 50 of the heating element 20 with the corresponding size is turned on, and the heating temperature of each sub-heating strip is adjusted by controlling the temperature control system corresponding to each sub-heating strip of the heating element 20.
The sealant 212 is disposed in the non-display region of the liquid crystal display panel 211, and the sealant 212 is used for bonding the liquid crystal display panel 211 and the cover plate 213. Therefore, the heating element provided by the embodiment of the invention only heats the frame glue 212 in the non-display area, the liquid crystal in the display area is not affected by the heating process, and the aging risk of the liquid crystal display panel after reworking can be reduced.
In an embodiment of the present invention, referring to fig. 6, the sub-heating strip includes a metal sleeve 2011 and a heating wire 2012 disposed in the metal sleeve 2011, and heat generated by the heating wire 2012 after being energized is transmitted to the display module through the metal sleeve with good thermal conductivity. The temperature of the sub-heating strips is related to the current flowing through the heating wire, and after the sub-heating strips are electrified, the current flows through the heating wire, so that the heating wire generates heat. The temperature control system controls the temperature by controlling the magnitude of the applied voltage, the temperature is reduced when the voltage applied at the two ends is reduced, and the temperature is increased when the voltage applied at the two ends is increased.
Referring to fig. 5, in another embodiment of the present invention, one side of the carrying surface 11 of the machine may include only one closed-loop groove 30, the groove may be wound along the edge of the machine 10, and the width W1 of the groove 30 is greater than the width W2 of the heating element 20.
The heating apparatus 100 may only include one heating element 20, any sub-heating strip of the heating element 20 may be of a telescopic structure, and the metal sleeve of the sub-heating strip may be designed to be of a telescopic structure, and specifically, the two sub-metal sleeves may be sleeved together to form the metal sleeve, so that when the metal sleeve is at the shortest length, the two sub-metal sleeves have an overlapping region. The electric heating wires in the metal sleeve are spiral, the electric heating wires can be fixedly connected with the end parts of the two sides of the metal sleeve, and when the metal sleeve is stretched, the electric heating wires in the metal sleeve are stretched along with the metal sleeve, so that the sub heating strips are stretched or shortened, and the display modules with different sizes are met.
Accordingly, in order to change the area of the region surrounded by the heating element 20, any of the sub-heating strips can slide in the groove 30 to change the size of the heating element 20, and the size of the heating element 20 can be changed by extending or shortening the length direction of each sub-heating strip and moving the sub-heating strip in each direction, without designing several groups of heating elements at fixed positions to heat display modules with different sizes.
The telescopic direction of any sub-heating strip is perpendicular to the sliding direction of the sub-heating strip, so that the area of the area surrounded by each sub-heating strip is changed.
In other embodiments, please refer to fig. 5, two adjacent sub-heating strips may be fixed, so that only the other two sub-heating strips slide. For example, the first sub-heating bar 201 and the second sub-heating bar 202 do not slide in the groove 30, and the third sub-heating bar 203 and the fourth sub-heating bar 204 slide in the groove 30. When the heating element needs to change the size, one end of the first sub-heating strip 201 is fixed to the end of the second sub-heating strip 202, the other end of the first sub-heating strip 201 is extended and retracted to change the lengths of the first sub-heating strip 201 and the second sub-heating strip 202, and correspondingly, the third sub-heating strip 203 is extended and retracted to change the positions and lengths of the third sub-heating strip 203 and the fourth sub-heating strip 204 by extending and retracting and sliding the fourth sub-heating strip 204, so as to change the size of the sub-heating element 20 as a whole.
The sliding of the heating sub-strips in the grooves 30 can be achieved by a driving member, and the heating apparatus further comprises a driving member (not shown), such as a motor, a servo motor, etc., which can achieve the mechanical movement of the heating sub-strips.
The heating equipment for the display module, provided by the invention, is provided with the closed-loop heating element, so that the heating element only heats the rubber frame area of the display module, the power consumption is low, the temperature rise is fast, the operation is easy, and the aging risk of the liquid crystal display panel after the reworking can be reduced.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above detailed description is provided for the heating device of the display module according to the embodiment of the present invention, and the principle and the implementation manner of the present invention are explained by applying specific examples, and the description of the above embodiments is only used to help understanding the technical scheme and the core idea of the present invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a display module's firing equipment which characterized in that includes:
the machine platform bears the display module; and
at least one closed loop heating element; wherein,
bearing surface one side of board includes the recess of an at least closed loop, the heating member is located in the recess, just the top surface of heating member with the bearing surface parallel and level.
2. The heating apparatus as claimed in claim 1, wherein any of said heating members comprises a plurality of sub-heating strips connected end to end in sequence, and the temperature of any of said sub-heating strips is controlled by an independent temperature control system.
3. The heating apparatus as claimed in claim 2, wherein any of the heating members includes first, second, third, and fourth sub-heating strips connected end to end, the first sub-heating strip being disposed opposite to the third sub-heating strip, and the second sub-heating strip being disposed opposite to the fourth sub-heating strip.
4. The heating apparatus according to claim 3, wherein the first sub-heating bar, the second sub-heating bar, the third sub-heating bar, and the fourth sub-heating bar correspond to one of the temperature control systems, respectively.
5. The heating apparatus according to claim 2, characterized in that the heating apparatus includes a first heating element, a second heating element surrounding the first heating element, and a third heating element surrounding the second heating element, the carrying surface side of the machine table includes a first groove, a second groove surrounding the first groove, and a third groove surrounding the second groove, the first heating element is located in the first groove, the second heating element is located in the second groove, and the third heating element is located in the third groove.
6. The heating apparatus as claimed in claim 2, wherein the groove is formed around an edge of the machine table, and a width of the groove is larger than a width of the heating member.
7. The heating apparatus of claim 6, wherein any of the sub-heating strips is of a telescopic structure, and any of the sub-heating strips is capable of sliding in the groove.
8. The heating apparatus of claim 7, further comprising a drive that drives the sub-heating bar to slide.
9. The heating apparatus of claim 2, wherein the sub-heating strips comprise a metal sleeve and a heating wire positioned within the metal sleeve.
10. The heating apparatus according to claim 1, wherein any one of the heating members is provided with at least two independent activation switches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110718585.0A CN113391474A (en) | 2021-06-28 | 2021-06-28 | Heating equipment of display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110718585.0A CN113391474A (en) | 2021-06-28 | 2021-06-28 | Heating equipment of display module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113391474A true CN113391474A (en) | 2021-09-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110718585.0A Pending CN113391474A (en) | 2021-06-28 | 2021-06-28 | Heating equipment of display module |
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| Country | Link |
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| CN (1) | CN113391474A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2713770Y (en) * | 2004-05-28 | 2005-07-27 | 孙瑞芳 | Collapsible fast water heater |
| JP2008299182A (en) * | 2007-06-01 | 2008-12-11 | Hitachi Ltd | Liquid crystal display |
| CN101487933A (en) * | 2008-01-18 | 2009-07-22 | 北京京东方光电科技有限公司 | Screen detaching device for LCD |
| CN201924213U (en) * | 2010-11-15 | 2011-08-10 | 王杰 | Electric heating clothes hanger |
| CN104526725A (en) * | 2014-11-11 | 2015-04-22 | 捷星显示科技（福建）有限公司 | Tool for cutting double-sided adhesive tape between liquid crystal display panel and glue frame |
| CN105047583A (en) * | 2014-04-22 | 2015-11-11 | 株式会社幸和 | Substrate supporting device and substrate processing apparatus |
| CN105372855A (en) * | 2015-11-17 | 2016-03-02 | 成都大梦空间文化传播有限公司 | Liquid crystal screen detaching apparatus |
| CN205982927U (en) * | 2016-09-05 | 2017-02-22 | 京东方科技集团股份有限公司 | Heating apparatus |
| CN106864339A (en) * | 2016-12-30 | 2017-06-20 | 芜湖瑞泰汽车零部件有限公司 | Drinking water heating arrangements |
| CN109597448A (en) * | 2018-12-29 | 2019-04-09 | 杨松 | Heater |
-
2021
- 2021-06-28 CN CN202110718585.0A patent/CN113391474A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2713770Y (en) * | 2004-05-28 | 2005-07-27 | 孙瑞芳 | Collapsible fast water heater |
| JP2008299182A (en) * | 2007-06-01 | 2008-12-11 | Hitachi Ltd | Liquid crystal display |
| CN101487933A (en) * | 2008-01-18 | 2009-07-22 | 北京京东方光电科技有限公司 | Screen detaching device for LCD |
| CN201924213U (en) * | 2010-11-15 | 2011-08-10 | 王杰 | Electric heating clothes hanger |
| CN105047583A (en) * | 2014-04-22 | 2015-11-11 | 株式会社幸和 | Substrate supporting device and substrate processing apparatus |
| CN104526725A (en) * | 2014-11-11 | 2015-04-22 | 捷星显示科技（福建）有限公司 | Tool for cutting double-sided adhesive tape between liquid crystal display panel and glue frame |
| CN105372855A (en) * | 2015-11-17 | 2016-03-02 | 成都大梦空间文化传播有限公司 | Liquid crystal screen detaching apparatus |
| CN205982927U (en) * | 2016-09-05 | 2017-02-22 | 京东方科技集团股份有限公司 | Heating apparatus |
| CN106864339A (en) * | 2016-12-30 | 2017-06-20 | 芜湖瑞泰汽车零部件有限公司 | Drinking water heating arrangements |
| CN109597448A (en) * | 2018-12-29 | 2019-04-09 | 杨松 | Heater |
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Application publication date: 20210914 |