CN107591428B - Device and method for attaching flexible OLED panel to curved cover plate - Google Patents
Device and method for attaching flexible OLED panel to curved cover plate Download PDFInfo
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- CN107591428B CN107591428B CN201710822698.9A CN201710822698A CN107591428B CN 107591428 B CN107591428 B CN 107591428B CN 201710822698 A CN201710822698 A CN 201710822698A CN 107591428 B CN107591428 B CN 107591428B
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Abstract
The embodiment of the invention discloses a device for attaching a flexible OLED panel to a curved cover plate, which comprises: an upper working table; a lower working table; a drum; the piezoelectric conversion module is used for detecting the pressure of the roller on the flexible OLED panel in real time, generating a corresponding electric signal and generating a corresponding position signal according to the position of the electric signal generated by the piezoelectric conversion module; the processing module judges whether the pressure of the roller on the flexible OLED panel is proper or not according to the electric signal and the position signal; and the adjusting module is electrically connected with the processing module, and when the processing module judges that the pressure of the roller on the flexible OLED panel is not appropriate, the adjusting module adjusts the pressure applied to the flexible OLED panel by the roller. The embodiment of the invention also discloses a method for attaching the flexible OLED panel to the curved cover plate. The invention has the advantage of reducing the number of products with defects in the laminating process.
Description
Technical Field
The invention relates to the technical field of display, in particular to a device and a method for attaching a flexible OLED panel to a curved cover plate.
Background
The flexible panel is developed based on an OLED (Organic Light Emitting Diode) technology, an Active-matrix Organic Light Emitting Diode (AMOLED) technology has become a mainstream leading-edge technology of the flexible panel, and more panel manufacturers invest in the flexible AMOLED technology after three stars. Limited by technical factors, the main application form of the flexible panel in the current market is a mobile phone terminal with a curved cover plate with a curved edge. Such as samsung S7Edge, Note 7, VIVO X6 play, etc., are all such applications. The production of the above products requires the application of a 3D curved cover plate attaching technique, which is also called curved cover plate attaching. Compared with the common glass panel laminating, the laminating has higher defective rate and higher requirements on equipment and process.
At present, the roller attaching mode has important application in attaching a curved surface cover plate, please refer to fig. 1, and the specific steps of the roller attaching mode are as follows: the 3D curved cover plate is placed on the lower workbench, the upper workbench grabs the flexible OLED panel, and the roller rolls from one end of the flexible OLED panel to the other end of the flexible OLED panel to press the flexible OLED panel onto the 3D curved cover plate. However, when the roller attaching method is applied to the 3D curved cover plate attaching, the product is prone to generate defects such as LineDefect at the bent edge, and after analysis and measurement, it is considered that the pressure of the roller on the flexible OLED panel at the edge is too large, which causes damage to the flexible OLED panel.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a device and a method for attaching a flexible OLED panel to a curved cover plate. The damage of the flexible OLED panel in the process of being attached to the curved cover plate can be improved.
In order to solve the above technical problem, an embodiment of the present invention provides an apparatus for attaching a flexible OLED panel to a curved cover plate, including:
an upper table for placing the flexible OLED panel thereon;
the lower workbench is positioned below the upper workbench, the upper surface of the lower workbench is used for placing the curved cover plate, and the shape of the upper surface is matched with that of the curved cover plate;
the roller rolls on the flexible OLED panel to apply pressure to press the flexible OLED panel on the upper workbench onto the curved cover plate;
the piezoelectric conversion module is used for detecting the pressure of the roller on the flexible OLED panel in real time, generating a corresponding electric signal and generating a corresponding position signal according to the position of the electric signal generated by the piezoelectric conversion module;
the processing module is electrically connected with the piezoelectric conversion module, receives the electric signal and the position signal generated by the piezoelectric conversion module, and judges whether the pressure of the roller on the flexible OLED panel is proper or not according to the electric signal and the position signal;
and the adjusting module is electrically connected with the processing module, and when the processing module judges that the pressure of the roller on the flexible OLED panel is not appropriate, the adjusting module adjusts the pressure applied to the flexible OLED panel by the roller.
In an embodiment of the first aspect of the present invention, the piezoelectric conversion module includes a piezoelectric sensor for converting the detected pressure of the roller on the flexible OLED panel into a voltage signal, and a position sensing module for determining a position of the voltage signal on the piezoelectric sensor to generate a corresponding position signal.
In an embodiment of the first aspect of the present invention, the piezoelectric sensor is located on a lower surface of the lower stage, and the position sensing module is located on a lower surface of the piezoelectric sensor.
In an embodiment of the first aspect of the present invention, the lower stage includes a first lower stage and a second lower stage, the upper surface of the first lower stage is used for placing the curved cover plate, the piezoelectric sensor is located on the lower surface of the first lower stage, the position sensing module is located on the lower surface of the piezoelectric sensor, and the second lower stage is located below the position sensing module.
In the first embodiment of the first aspect of the present invention, at least a partial area of the piezoelectric sensor is configured to match a shape of the flexible OEDE after being bonded to the curved cover plate, and at least a partial area of the position sensing module is configured to match a shape of the flexible OEDE after being bonded to the curved cover plate.
In an embodiment of the first aspect of the present invention, the processing module receives an electrical signal and a position signal of the piezoelectric conversion module in real time, the processing module processes the electrical signal and the position signal in real time, when the processing module determines that the pressure of the roller on the flexible OLED panel is not appropriate, the processing module sends a signal to the adjusting module in real time, and the adjusting module adjusts the pressure of the roller on the flexible OLED panel in real time; or the processing module receives the electric signals and the position signals of the piezoelectric conversion module in real time, the processing module processes the electric signals and the position signals in a centralized manner after the flexible OLED panel is attached to the curved surface cover plate, when the processing module judges that the pressure of the roller to the flexible OLED panel is not appropriate, the processing module sends the signals to the adjusting module, and the adjusting module adjusts the pressure of the roller to the flexible OLED panel.
The embodiment of the second aspect of the invention provides a method for attaching a flexible OLED panel to a curved cover plate, which comprises the following steps:
placing the curved cover plate on the upper surface of the lower workbench;
placing the flexible OLED panel on the upper table;
rolling from one end of the flexible OLED panel to the other end of the flexible OLED panel through a roller to apply pressure to press the flexible OLED panel onto the curved cover plate;
detecting the pressure of the roller on the flexible OLED panel in real time through a piezoelectric conversion module, generating a corresponding electric signal, and generating a corresponding position signal according to the position of the electric signal generated by the piezoelectric conversion module;
judging whether the pressure of the roller on the flexible OLED panel is proper or not according to the electric signal and the position signal;
and if not, adjusting the pressure applied by the roller to the flexible OLED panel.
In an embodiment of the second aspect of the present invention, the step of determining whether the pressure of the roller on the flexible OLED panel is appropriate according to the electrical signal and the position signal specifically includes: judging whether the pressure of the roller on the flexible OLED panel is proper or not in real time according to the electric signal and the position signal;
the step of adjusting the pressure applied by the roller to the flexible OLED panel if not appropriate may specifically include: and if not, adjusting the pressure applied to the flexible OLED panel by the roller in real time.
In an embodiment of the second aspect of the present invention, the step of determining whether the pressure of the roller on the flexible OLED panel is appropriate according to the electrical signal and the position signal specifically includes:
after the flexible OLED panel is attached to the curved cover plate, whether the pressure of the roller on the flexible OLED panel is proper or not in the process of attaching the flexible OLED panel to the curved cover plate is judged in a centralized mode according to the electric signals and the position signals.
In an embodiment of the second aspect of the present invention, the piezoelectric conversion module includes a piezoelectric sensor for converting the detected pressure of the roller on the flexible OLED panel into a voltage signal, and a position sensing module for determining a position of the voltage signal on the piezoelectric sensor to generate a corresponding position signal.
In an embodiment of the second aspect of the present invention, the piezoelectric sensor is located on a lower surface of the lower table, and the position sensing module is located on a lower surface of the piezoelectric sensor; or the lower workbench comprises a first lower workbench and a second lower workbench, the curved cover plate is placed on the upper surface of the first lower workbench, the piezoelectric sensor is positioned on the lower surface of the first lower workbench, the position sensing module is positioned on the lower surface of the piezoelectric sensor, the second lower workbench is positioned below the position sensing module, and the shapes of the piezoelectric sensor and the position sensing module are matched with the shape of the flexible OEDE pressed on the curved cover plate.
The embodiment of the invention has the following beneficial effects:
because the device of laminating flexible OLED panel to curved surface apron includes: the piezoelectric conversion module is used for detecting the pressure of the roller on the flexible OLED panel in real time, generating a corresponding electric signal and generating a corresponding position signal according to the position of the electric signal generated by the piezoelectric conversion module; the processing module is electrically connected with the piezoelectric conversion module, receives the electric signal and the position signal generated by the piezoelectric conversion module, and judges whether the pressure of the roller on the flexible OLED panel is proper or not according to the electric signal and the position signal; and the adjusting module is electrically connected with the processing module, and when the processing module judges that the pressure of the roller on the flexible OLED panel is not appropriate, the adjusting module adjusts the pressure applied to the flexible OLED panel by the roller, so that the number of products with defects in the attaching process can be reduced, and the cost can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a prior art apparatus for attaching a flexible OLED panel to a curved cover sheet;
FIG. 2 is a schematic diagram of an apparatus for attaching a flexible OLED panel to a curved cover plate according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of the position sensing module of FIG. 2;
FIG. 4 is a schematic view of an apparatus for attaching a flexible OLED panel to a curved cover plate according to another embodiment of the present invention;
FIG. 5 is a flow chart of a method of attaching a flexible OLED panel to a curved cover plate according to one embodiment of the present invention;
FIG. 6 is a flow chart of a method of attaching a flexible OLED panel to a curved cover plate according to another embodiment of the present invention;
FIG. 7 is a flow chart of a method of attaching a flexible OLED panel to a curved cover sheet according to yet another embodiment of the present invention;
reference numbers of the drawings:
110. 210-upper table; 120. 220-lower worktable; 321-a first lower table; 322-a second lower table; 130. 230-a roller; 240. 340-a piezoelectric conversion module; 241. 341-piezoelectric sensor; 242. 342-a position sensing module; 243-sub sensor; 250-a processing module; 260-an adjustment module; 191. 291-flexible OLED panel; 192. 292-curved cover plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
The terms "comprising" and "having," and any variations thereof, as appearing in the specification, claims and drawings of this application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.
The embodiment of the invention provides a device for attaching a flexible OLED panel to a curved cover plate, which is shown in fig. 2 and includes an upper workbench 210, a lower workbench 220, a roller 230, a piezoelectric conversion module 240, a processing module 250 and an adjusting module 260.
In this embodiment, the upper table 210 is used to place the flexible OLED panel 291 on the upper table 210, and specifically, the flexible OLED panel 291 is adhered to the lower surface of the upper table 210, so that the adhesive force can overcome the gravity of the flexible OLED panel 291 to prevent the flexible OLED panel 291 from being separated from the upper table 210. In this embodiment, the flexible OLED panel 291 includes a flexible substrate, a thin film transistor, a metal anode, an organic light emitting layer, and a metal cathode, where the thin film transistor and the metal anode are disposed on the flexible substrate, the metal cathode is disposed above the metal anode, and the organic light emitting layer is disposed between the metal anode and the metal cathode. In addition, in other embodiments of the present invention, the flexible OLED panel may not include a thin film transistor. In this embodiment, the flexible OLED panel 291 is flexible and can be bent. In other embodiments of the present invention, the flexible OLED panel may be placed on the upper table by a pull-in manner.
In this embodiment, the lower working platform 220 is located below the upper working platform, and the lower working platform 220 is a flexible lower working platform 220, so that the pressure applied to the lower working platform 220 can be transmitted. The upper surface of the lower table 220 is used for placing a curved cover plate 292, in this embodiment, the middle portion of the curved cover plate 292 is a flat plate, and two ends of the curved cover plate 292 are bent upward. In order to make the curved cover plate 292 be stably placed on the lower table 220, the upper surface of the lower table 220 is matched with the curved cover plate 292, that is, the middle part of the upper surface of the lower table 220 is a plane, and both ends of the upper surface of the lower table 220 are also bent upward. In this embodiment, the curved cover 292 is adhered to the lower platen 220, but in other embodiments of the present invention, the curved cover may also be adhered to the lower platen 220.
In the embodiment, the roller 230 is located above the lower table 220 and adjacent to the upper table 210, and the roller 230(roller) can roll on the flexible OLED panel 291 to apply pressure to press the flexible OLED panel 291 on the upper table 210 onto the curved cover plate 292. Specifically, in this embodiment, in order to facilitate the roller 230 to roll the flexible curved cover plate 292, in fig. 2, a right end of the flexible OLED panel 291 partially extends beyond a right end of the upper table 210, so that the roller 230 applies pressure to the flexible OLED panel 291 from the right end of the flexible OLED panel 291, the flexible OLED panel 291 is gradually released from the upper table 210 by the pressure of the roller 230, and the flexible OLED panel 291 is gradually pressed onto the curved cover plate 292 from the right end to the left end, and since the flexible OLED panel 291 is flexible, the flexible OLED panel 291 changes with the shape of the curved cover plate 292.
In order to prevent the roller 230 from applying excessive pressure to the flexible OLED panel 291 during the process of pressing the roller 230 onto the curved cover plate 292, which may cause damage to the flexible OLED panel 291, in this embodiment, the piezoelectric conversion module 240 is configured to detect the pressure of the roller 230 on the flexible OLED panel 291 in real time and generate a corresponding electrical signal, so as to convert the pressure into an electrical signal, which is a voltage signal in this embodiment. Of course, in other embodiments of the present invention, the electrical signal may also be a current signal, a capacitance signal, or the like. Specifically, when the roller 230 applies pressure to the flexible OLED panel 291 at a certain time, the portion of the flexible OLED panel 291 applied with the pressure at this time is separated from the upper table 210, and the portion is attached to the corresponding position of the curved cover plate 292, and the pressure applied to the flexible OLED panel 291 by the roller 230 is transmitted to the curved cover plate 292 at the corresponding position, transmitted to the lower table 220 at the corresponding position through the curved cover plate 292, and transmitted to the piezoelectric conversion module 240 (see fig. 2) at the corresponding position through the lower table 220, so that the piezoelectric conversion module 240 can obtain the pressure applied to the flexible OLED panel 291 by the roller 230 at this time, and generate a corresponding electrical signal according to the pressure. Moreover, in this embodiment, the piezoelectric conversion module 240 is disposed corresponding to the flexible OLED panel 291 pressed on the curved cover plate 292, so that when a certain point of the flexible OLED panel 291 is pressed by the roller 230, the corresponding position of the piezoelectric conversion module 240 generates the electrical signal, so that the piezoelectric conversion module 240 generates a corresponding position signal according to the position generated by the electrical signal of the piezoelectric conversion module 240, and then the piezoelectric conversion module 240 sends the electrical signal and the position signal to the processing module 250 in real time.
In this embodiment, the processing module 250 is electrically connected to the piezoelectric conversion module 240, and receives the electrical signal and the position signal generated by the piezoelectric conversion module 240, where the electrical signal is a voltage signal in this embodiment, and the processing module 250 has different voltage thresholds or voltage threshold ranges corresponding to different pre-stored position signals, but may also be a current threshold, a capacitance threshold, and the like in other embodiments of the present invention. The processing module 250 determines whether the pressure of the roller 230 on the flexible OLED panel 291 is suitable according to the voltage signal and the position signal, specifically, when the voltage signal exceeds a voltage threshold or a voltage threshold range of a corresponding position signal, the processing module 250 determines that the pressure of the roller 230 on the flexible OLED panel 291 is not suitable, and when the voltage signal does not exceed the voltage threshold or the voltage threshold range of a corresponding position signal, the processing module 250 determines that the pressure of the roller 230 on the flexible OLED panel 291 is suitable.
In this embodiment, the adjusting module 260 is electrically connected to the processing module 250, and when the processing module 250 determines that the pressure of the roller 230 on the flexible OLED panel 291 is not appropriate, that is, when the voltage signal exceeds the voltage threshold or the voltage threshold range of the corresponding position signal, the adjusting module 260 changes the operating parameter of the roller 230, for example, the adjusting module 260 includes a motor, and the operating parameter of the motor is changed, so as to adjust the pressure of the roller 230 on the flexible OLED panel 291, for example, reduce the pressure of the roller 230 on the flexible OLED panel 291, so as to reduce the number of products with defects generated in the attaching process, and thus reduce the cost.
With continued reference to fig. 2, in the present embodiment, the piezoelectric conversion module 240 includes a piezoelectric sensor 241 and a position sensing module 242, the piezoelectric sensor 241 is a sensor based on piezoelectric effect, and a sensing element thereof is made of piezoelectric material, the piezoelectric sensor 241 is used for converting the detected pressure of the roller 230 on the flexible OLED panel 291 into a voltage signal, generally speaking, the pressure is proportional to the magnitude of the voltage signal, that is, the pressure is larger, the voltage signal is also larger, and the pressure is smaller, and the voltage signal is also smaller. In this embodiment, the piezoelectric sensor 241 is located on the lower surface of the lower table 220, specifically, closely attached to the lower surface of the lower table 220, the piezoelectric sensor 241 is in a flat plate shape, and the size of the piezoelectric sensor 241 is greater than or equal to the size of the projection of the flexible OLED panel 291 attached to the curved cover plate 292 on the horizontal plane, so that each position on the flexible OLED panel 291 corresponds to a position on the piezoelectric sensor 241, when a certain position of the piezoelectric sensor 241 is pressed, the position generates a voltage signal, and when a plurality of positions of the piezoelectric sensor 241 are pressed, each position generates a voltage signal. In this embodiment, the position sensing module 242 is located on a lower surface of the piezoelectric sensor 241, specifically, closely attached to the lower surface of the piezoelectric sensor 241, the position sensing module 242 is formed on a rigid substrate, the position sensing module 242 includes a plurality of sub-sensors 243, the sub-sensors 243 are arranged in a matrix (see fig. 3), each sub-sensor 243 corresponds to a position of the piezoelectric sensor 241, the size of the position sensing module 242 is equal to the size of the piezoelectric sensor 241, so that a voltage signal generated at any position of the piezoelectric sensor 241 can be detected by the position sensing module 242, specifically, the sub-sensors 243, the position of the voltage signal on the piezoelectric sensor 241 can be known according to the positions of the sub-sensors 243, so as to generate a corresponding position signal, the position sensing module 242 sends the voltage signal and the position signal to the processing module 250, of course, in other embodiments of the present invention, the piezoelectric sensor may also transmit a voltage signal to the processing module, and the position sensing module transmits a position signal to the processing module. In another embodiment of the present invention, the piezoelectric conversion module is not limited to be located on a lower surface of the lower stage, and the lower stage may further include a first lower stage on which the curved cover plate is placed, the piezoelectric sensor being located on a lower surface of the first lower stage, the position sensing module being located on a lower surface of the piezoelectric sensor, and the second lower stage being located below the position sensing module. In addition, in other embodiments of the present invention, the piezoelectric conversion module may also be located on the upper surface of the lower table, and the curved cover plate is directly placed on the piezoelectric conversion module.
In this embodiment, since some regions of the flexible OLED panel 291 after being attached to the curved cover plate 292 are curved (both left and right ends are curved in fig. 2), and the piezoelectric sensor 241 is planar, so that there is a certain error in the process of converting the pressure into the voltage signal by the piezoelectric sensor 241, in order to improve this problem, and to measure the pressure of the roller 230 on the flexible OLED panel 291 more accurately, in another embodiment of the present invention, referring to fig. 4, in this embodiment, the lower table includes a first lower table 321 and a second lower table 322, it can be understood that the lower table is cut and divided into two parts, i.e., a first lower table 322 on which the curved cover plate 292 is disposed, and a first lower table 321 on which the shape of the curved cover plate 292 is matched, specifically, in this embodiment, the left and right ends of the curved cover plate 292 are bent upward, the left and right ends of the upper surface of the first lower stage 321 are bent upward, the piezoelectric sensor 341 is located on the lower surface of the first lower stage 321, the position sensing module 342 is located on the lower surface of the piezoelectric sensor 341, and the second lower stage 322 is located below the position sensing module 342, in this embodiment, the shape of at least a partial region of the piezoelectric sensor 341 is configured to match the shape of the flexible OEDE after being laminated on the curved cover plate 292, in this embodiment, the shape of the entire region of the piezoelectric sensor 341 is configured to match the shape of the flexible OEDE after being laminated on the curved cover plate 292, and the shape of at least a partial region of the position sensing module 342 is configured to match the shape of the flexible OEDE after being laminated on the curved cover plate 292, in this embodiment, the shape of the entire area of the position sensing module 342 is adapted to match the shape of the flexible OEDE after being pressed onto the curved cover plate 292, in this embodiment, the middle between the piezoelectric sensor 341 and the position sensing module 342 is flat, and the left and right ends are bent upward. In order to make the piezoelectric sensor 341 and the lower surface of the first lower stage 321 adhere to each other well, the lower surface of the first lower stage 321 is matched to the shape of the piezoelectric sensor 341, in order to make the position sensing module 342 and the upper surface of the second lower stage 322 adhere to each other well, the upper surface of the second lower stage 322 is matched to the shape of the position sensing module 342, and in order to make the second lower stage 322 stably stand, the bottom surface of the second lower stage 322 is a plane. In this embodiment, since the shape of at least a partial region of the piezoelectric sensor 341 is adapted to match the shape of the flexible OEDE after it is pressed onto the curved cover plate 292, when the pressure of the roller 230 is applied to the flexible OLED panel 291, and further acts on the curved cover plate 292 and the first lower stage 321, so that the pressure obtained by the piezoelectric sensor 341 is relatively precise at any position, therefore, the voltage signal generated by the piezoelectric sensor 341 is relatively precise, and since the shape of at least a partial region of the position sensing module 342 is adapted to match the shape of the flexible OEDE pressed on the curved cover plate 292, the position signal generated by the position sensing module 342 based on the voltage signal is thus also accurate, thereby facilitating subsequent adjustment of the pressure applied to the roller 230, defects in the attachment of flexible OLED panel 291 to curved cover plate 292 may be further reduced. Moreover, in the embodiment, since the piezoelectric conversion module 340 is located between the first lower stage 321 and the second lower stage 322, the piezoelectric conversion module 340 is protected and is not easily damaged.
Referring to fig. 2, in the present embodiment, the processing module 250 receives the electrical signal and the position signal generated by the piezoelectric conversion module 240 in real time, and the processing module 250 processes the electrical signal and the position signal in real time, for example, the processing module 250 compares the voltage signal with a pre-stored voltage threshold or a pre-stored voltage threshold range of the corresponding position signal in real time, and when the processing module 250 determines that the roller 230 is facing the flexible substrate
When the pressure of the OLED panel 291 is inappropriate, the processing module 250 sends a signal to the adjusting module 260 in real time, and the adjusting module 260 adjusts the pressure of the roller 230 on the flexible OLED panel 291 in real time, so that the pressure applied to the flexible OLED panel 291 by the roller 230 is adjusted in real time, thereby preventing the current flexible OLED panel 291 from being damaged in the attaching process, and improving the yield. However, in this attaching manner, when the adjusting module 260 adjusts the roller 230, the flexible OLED panel 291 needs to be temporarily attached to the curved cover plate 292, so that it takes a long time to completely attach the flexible OLED panel 291 to the curved cover plate 292, which is not favorable for improving efficiency and productivity.
In addition, in another embodiment of the present invention, in order to improve the bonding efficiency, in this embodiment, the processing module receives the electrical signal and the position signal of the piezoelectric conversion module in real time, after receiving the electrical signal and the position signal, the processing module does not perform processing, for example, buffers or stores the signals, after the flexible OLED panel is bonded to the curved cover plate, the processing module calls the stored electrical signal and the stored position signal before the flexible OLED panel is bonded next, and processes the electrical signal and the position signal in a centralized manner, at this time, the storage module stores a large number of electrical signals and position signals corresponding to the electrical signals, the processor processes the data one by one, and when the processing module determines that the corresponding voltage signal exceeds the corresponding threshold voltage or threshold voltage range when the processing module determines that the corresponding voltage signal or the corresponding position signal exceeds the corresponding threshold voltage range, that is, when the processing module determines that the pressure of the roller on the flexible OLED panel at some position is not appropriate, the processing module sends an adjustment signal to the adjustment module, where the adjustment signal includes, for example, at which position the pressure of the roller is too high, and the adjustment module adjusts the pressure of the roller on the flexible OLED panel. In this embodiment, because laminate in flexible OLED panel just adjust behind the curved surface apron, the flexible OLED panel damage's that can appear the preceding face in the difficult circumstances of can improving the flexible OLED panel and laminate the efficiency of curved surface apron, moreover through the adjustment back, the flexible OLED panel of back is difficult to damage at the laminating in-process.
The embodiment of the present invention further provides a method for attaching a flexible OLED panel to a curved cover plate, please refer to fig. 5, which includes:
s110: placing the curved cover plate on the upper surface of the lower workbench;
in this embodiment, the middle of the curved cover plate is a plane, and the left and right ends of the curved cover plate are upward arcs, but in other embodiments of the present invention, the curved cover plate may have other shapes. The upper surface of the lower workbench is matched with the curved surface cover plate in shape, so that the curved surface cover plate is well adhered to the upper surface of the lower workbench.
S120: placing the flexible OLED panel on the upper table;
in this embodiment, the flexible OLED panel is adhered to the lower surface of the upper table, and one end (in this embodiment, the right end) of the flexible OLED panel close to the roller exceeds the end of the upper table, that is, a part of the flexible OLED panel area is not in contact with the upper table, so that the roller can apply pressure to the flexible OLED panel at the beginning, and the interference of the upper table to the roller is prevented. In the present invention, the order of step S110 and step S120 is not limited.
S130: rolling the other end of the flexible OLED panel from one end of the flexible OLED panel through a roller to apply pressure to press the flexible OLED panel onto the curved cover plate;
in this embodiment, the roller applies pressure from the right end of the flexible OLED panel, and the roller rolls from the right end of the flexible OLED panel to the left end of the flexible OLED panel, which may be repeated several times to press-fit the flexible OLED panel onto the curved cover plate.
S140: detecting the pressure of the roller on the flexible OLED panel in real time through a piezoelectric conversion module, generating a corresponding electric signal, and generating a corresponding position signal according to the position of the electric signal generated by the piezoelectric conversion module;
when the roller applies pressure to the flexible OLED panel, the piezoelectric conversion module detects the pressure of the roller to the flexible OLED panel in real time and generates a corresponding electrical signal. In addition, in this embodiment, the piezoelectric conversion module is disposed corresponding to the flexible OLED panel, so that when a point of the flexible OLED panel is pressed by the roller, a corresponding position of the piezoelectric conversion module generates a corresponding electrical signal, and then the piezoelectric conversion module generates a corresponding position signal according to the position of the electrical signal, and the piezoelectric conversion module sends the electrical signal and the position signal to the processing module in real time.
S150: judging whether the pressure of the roller on the flexible OLED panel is proper or not according to the electric signal and the position signal, and if so, performing the step S170: attaching the next flexible OLED panel, and if the flexible OLED panel is not suitable, performing step S160;
in this embodiment, the processing module determines whether the pressure of the drum on the flexible OLED panel is appropriate according to the electrical signal and the position signal, for example, the processing module determines whether a voltage signal exceeds a threshold voltage or a threshold voltage range preset for the position signal, if so, it determines that the pressure of the drum on the flexible OLED panel is not appropriate, and then, step S160 is performed, if so, step S170 is performed: and attaching the next flexible OLED panel.
S160: and if not, adjusting the pressure applied by the roller to the flexible OLED panel.
In this embodiment, if the determination result of the processing module is not appropriate, the processing module sends a signal to the adjusting module, and the adjusting module adjusts the pressure applied by the roller to the flexible OLED panel, where the pressure of the roller corresponding to the position signal to the flexible OLED panel is adjusted.
In this embodiment, referring to fig. 6, step S150 specifically includes:
s250: and judging whether the pressure of the roller on the flexible OLED panel is proper or not in real time according to the electric signal and the position signal.
Step S160 specifically includes:
s260, if the pressure is not suitable, the step of adjusting the pressure applied to the flexible OLED panel by the roller specifically comprises the following steps: and if not, adjusting the pressure applied to the flexible OLED panel by the roller in real time.
When the processing module judges that the pressure of the roller on the flexible OLED panel is not appropriate, the processing module sends a signal to the adjusting module in real time, and the adjusting module adjusts the pressure applied to the flexible OLED panel by the roller in real time. However, in this method, the flexible OLED panel needs to be temporarily attached to the curved cover plate during adjustment, so that it takes a long time to completely attach one flexible OLED panel to the curved cover plate, which is not beneficial to improving efficiency.
In order to improve the bonding efficiency, in another embodiment of the present invention, referring to fig. 7, the step S150 specifically includes:
and S360, after the flexible OLED panel is attached to the curved cover plate, whether the pressure of the roller on the flexible OLED panel is proper in the process of attaching the flexible OLED panel to the curved cover plate is judged in a centralized mode according to the electric signals and the position signals.
In this embodiment, the processing module receives the voltage signal and the position signal of the piezoelectric conversion module in real time, after receiving the voltage signal and the position signal, the processing module does not process the signals, for example, the signals are cached or stored, after the flexible OLED panel is attached to the curved cover plate, the processing module calls the stored electrical signal and the stored position signal before the next flexible OLED panel is attached, the electrical signal and the position signal are processed in a centralized manner, at this time, the storage module stores a large number of electrical signals and position signals corresponding to the electrical signals, the processor processes the data one by one, when the processing module determines that the corresponding voltage signal exceeds the corresponding threshold voltage or threshold voltage range when the processing module determines that the position signal or the position signals, that is, when the processing module determines that the pressure of the roller on the flexible OLED panel is inappropriate at some positions, the processing module processes the voltage signal and the position signal The module sends an adjustment signal to the adjustment module, the adjustment signal including, for example, at which locations the roller is under excessive pressure, etc., and the adjustment module adjusts the pressure of the roller against the flexible OLED panel. In this embodiment, because laminate in flexible OLED panel just adjust behind the curved surface apron, the flexible OLED panel damage's that can appear the preceding face in the difficult circumstances of can improving the flexible OLED panel and laminate the efficiency of curved surface apron, moreover through the adjustment back, the flexible OLED panel of back is difficult to damage at the laminating in-process.
With continued reference to fig. 7, after step S160, the method further includes:
s380: and prompting the information that the front flexible OLED panel is damaged.
In this embodiment, the piezoelectric conversion module includes a piezoelectric sensor and a position sensing module, the piezoelectric sensor is configured to convert the detected pressure of the roller on the flexible OLED panel into a voltage signal, and the position sensing module is configured to determine a position of the voltage signal on the piezoelectric sensor to generate a corresponding position signal.
In this embodiment, the piezoelectric sensor is located on a lower surface of the lower stage, and the position sensing module is located on a lower surface of the piezoelectric sensor. In other embodiments of the present invention, the lower stage includes a first lower stage and a second lower stage, the upper surface of the first lower stage is used for placing the curved cover plate, the piezoelectric sensor is located on the lower surface of the first lower stage, the position sensing module is located on the lower surface of the piezoelectric sensor, the second lower stage is located below the position sensing module, and the shapes of the piezoelectric sensor and the position sensing module are matched with the shape of the flexible OEDE after being pressed on the curved cover plate.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
Through the description of the above embodiments, the present invention has the following advantages:
because the device of laminating flexible OLED panel to curved surface apron includes: the piezoelectric conversion module is used for detecting the pressure of the roller on the flexible OLED panel in real time, generating a corresponding electric signal and generating a corresponding position signal according to the position of the electric signal generated by the piezoelectric conversion module; the processing module is electrically connected with the piezoelectric conversion module, receives the electric signal and the position signal generated by the piezoelectric conversion module, and judges whether the pressure of the roller on the flexible OLED panel is proper or not according to the electric signal and the position signal; and the adjusting module is electrically connected with the processing module, and when the processing module judges that the pressure of the roller on the flexible OLED panel is not appropriate, the adjusting module adjusts the pressure applied to the flexible OLED panel by the roller, so that the number of products with defects in the attaching process can be reduced, and the cost can be reduced.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (9)
1. A device for attaching a flexible OLED panel to a curved cover plate, comprising:
an upper table for placing the flexible OLED panel thereon;
the lower workbench is positioned below the upper workbench, the upper surface of the lower workbench is used for placing the curved cover plate, and the shape of the upper surface is matched with that of the curved cover plate;
the roller rolls on the flexible OLED panel to apply pressure to press the flexible OLED panel on the upper workbench onto the curved cover plate;
the piezoelectric conversion module is used for detecting the pressure of the roller on the flexible OLED panel in real time, generating a corresponding electric signal and generating a corresponding position signal according to the position of the electric signal generated by the piezoelectric conversion module;
the processing module is electrically connected with the piezoelectric conversion module, receives the electric signal and the position signal generated by the piezoelectric conversion module, and judges whether the pressure of the roller on the flexible OLED panel is proper or not according to the electric signal and the position signal;
and the adjusting module is electrically connected with the processing module, after the flexible OLED panel is attached to the curved surface cover plate, the processing module processes the electric signals and the position signals in a centralized manner, and when the processing module judges that the pressure of the roller on the flexible OLED panel is not appropriate, the adjusting module adjusts the pressure applied to the flexible OLED panel by the roller.
2. The apparatus of claim 1, wherein the piezoelectric conversion module comprises a piezoelectric sensor and a position sensing module, the piezoelectric sensor is configured to convert the detected pressure of the roller on the flexible OLED panel into a voltage signal, and the position sensing module is configured to determine a position of the voltage signal on the piezoelectric sensor to generate a corresponding position signal.
3. The apparatus of claim 2, wherein the piezoelectric sensor is located on a lower surface of the lower stage and the position sensing module is located on a lower surface of the piezoelectric sensor.
4. The apparatus according to claim 2, wherein the lower stage comprises a first lower stage and a second lower stage, the first lower stage is disposed on an upper surface of the first lower stage for placing the curved cover plate, the piezoelectric sensor is disposed on a lower surface of the first lower stage, the position sensing module is disposed on a lower surface of the piezoelectric sensor, and the second lower stage is disposed below the position sensing module.
5. The apparatus according to claim 4, wherein at least a portion of the area of the piezoelectric sensor is configured to match a shape of the flexible OLED after being laminated to the curved cover plate, and at least a portion of the area of the position sensor module is configured to match a shape of the flexible OLED after being laminated to the curved cover plate.
6. The apparatus according to claim 1, wherein the processing module receives the electrical signal and the position signal of the piezoelectric transducer module in real time.
7. A method of attaching a flexible OLED panel to a curved cover plate, comprising:
placing the curved cover plate on the upper surface of the lower workbench;
placing the flexible OLED panel on an upper workbench;
rolling from one end of the flexible OLED panel to the other end of the flexible OLED panel through a roller to apply pressure to press the flexible OLED panel onto the curved cover plate;
detecting the pressure of the roller on the flexible OLED panel in real time through a piezoelectric conversion module, generating a corresponding electric signal, and generating a corresponding position signal according to the position of the electric signal generated by the piezoelectric conversion module;
judging whether the pressure of the roller on the flexible OLED panel is proper or not according to the electric signal and the position signal, wherein the judging step comprises the following steps: after the flexible OLED panel is attached to the curved cover plate, whether the pressure of the roller on the flexible OLED panel is proper or not in the process of attaching the flexible OLED panel to the curved cover plate is judged in a centralized manner according to the electric signal and the position signal;
and if not, adjusting the pressure applied by the roller to the flexible OLED panel.
8. The method according to claim 7, wherein the step of determining whether the pressure of the roller on the flexible OLED panel is appropriate according to the electrical signal and the position signal comprises: judging whether the pressure of the roller on the flexible OLED panel is proper or not in real time according to the electric signal and the position signal;
the step of adjusting the pressure applied by the roller to the flexible OLED panel if not appropriate may specifically include: and if not, adjusting the pressure applied to the flexible OLED panel by the roller in real time.
9. The method of conforming a flexible OLED panel to a curved cover sheet of claim 7 wherein the piezoelectric conversion module comprises a piezoelectric sensor for converting the detected pressure of the roller against the flexible OLED panel into a voltage signal and a position sensing module for determining the position of the voltage signal on the piezoelectric sensor to generate a corresponding position signal.
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| CN108615468B (en) * | 2018-04-20 | 2020-10-13 | 云谷（固安）科技有限公司 | Attaching device and attaching method for special-shaped curved surface cover plate and flexible screen |
| CN109830617A (en) * | 2019-01-14 | 2019-05-31 | 深圳市华星光电半导体显示技术有限公司 | Abutted equipment |
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