KR102322144B1 - Fabricating method for display panel with solar cells combined - Google Patents

Abstract

According to the present invention, provided is a manufacturing method of a display panel with a solar cell combined, in which power is generated even while a display panel is being used, so that the used power is supported by the generated power, or the generated power can be stored and used. The method includes: a step of manufacturing a battery panel; a primary hole machining step; a secondary hole machining step; an inspection step; a bad judgment step; a re-processing step to form a tertiary hole; and a step of forming a composite panel.

Description

Method of manufacturing a display panel combined with solar cells

The present invention relates to a method of manufacturing a display panel in which a solar cell is combined. In particular, it is possible to generate power even while the display panel is being used so that the used power is supported by the generated power, or the generated power can be stored and used. It relates to a method of manufacturing a display panel to which a solar cell is coupled.

In portable terminals such as smart phones and smart pads, the use of power occupies a very large proportion. Since portable terminals are used in a state in which external power is not supplied, a technology that minimizes the use of power and increases the battery capacity through space utilization is applied so that it can be used for a long time.

However, in recent portable terminals, the usage time by users is increasing, and more data needs to be processed, and thus more power is used. Therefore, whenever a new portable terminal is produced, the capacity of the battery increases, and even though a better technology for reducing power consumption is used, the usage time felt by the user is gradually decreasing.

In order to solve this problem, a method of configuring an additional battery to enable replacement or to use an auxiliary battery is used, but this only increases inconvenience to the user and the solution to the problem of power consumption of the portable terminal itself is can't be done Moreover, these additional components are seriously impairing portability, which is a basic feature of portable terminals.

Separately, recently, a method of using new and renewable energy is being sought as a part of reducing the chemical impact on the natural environment while replenishing the insufficient power production capacity. However, it is not easy to separately prepare a site for producing new and renewable energy, so it is not easy to increase the utilization of new and renewable energy. In particular, it is not easy to prepare a space for power generation even for solar cells, which have high usage compared to other renewable energy sources.

Republic of Korea Patent Publication No. 10-2017-014238 (published on November 10, 2017) "Flexible organic light emitting diode display"

Accordingly, it is an object of the present invention to manufacture a display panel in which a solar cell is combined so that power can be generated even while the display panel is being used, so that the used power is supported by the generated power, or the generated power can be stored and used. to provide a way

In addition, another object of the present invention is to enable the display panel and the power generation panel to be installed in the same space to enable solar power generation without securing a separate space for installing the power generation panel, and also to provide aesthetic and functional features by the display panel. An object of the present invention is to provide a method of manufacturing a display panel in which a solar cell is combined so that utilization can be increased.

In addition, another object of the present invention is to provide a solar cell that increases production efficiency by minimizing defects that occur during the manufacturing of a panel in which a display panel and a power generation panel are combined, and by allowing defects to be detected and normalized using automated technology. To provide a method for manufacturing a combined display panel.

In order to achieve the above object, a method for manufacturing a display panel coupled with a solar cell according to the present invention includes the steps of forming a battery cell by stacking a back electrode, an absorption layer, a buffer layer and a front electrode on a substrate; a primary hole processing step of forming a primary hole in a predetermined position of the battery cell; a secondary hole processing step of re-processing the primary hole to form a secondary hole; an inspection step of inspecting the battery cell in which the secondary hole is formed; a defect determination step by determining whether the battery cell is defective using the result of the inspection step; a re-processing step of machining the secondary hole to form a tertiary hole when it is determined that the battery cell is defective in the defective determination step; and a composite panel forming step of manufacturing a composite panel by combining with a previously manufactured display panel when it is determined that the battery cell is normal in the defective determination step.

The first hole is formed by etching all of the substrate, the rear electrode, the absorption layer, the buffer layer, and the front electrode.

The secondary hole or the tertiary hole is formed by etching at least one of the absorption layer, the buffer layer, and the front electrode.

The primary hole to the tertiary hole are formed by etching using a laser, and the laser for forming the primary hole and the laser used for forming the secondary hole or the tertiary hole are different from each other. do.

The primary hole to the tertiary hole may be etched with a diameter defined by a predetermined reference value.

The test step is characterized in that the voltage of the probe of the test device connected to the front electrode and the back electrode of the battery cell, respectively, is measured in a state in which light is supplied to the battery cell from the light source of the test device.

The test apparatus determines that the battery cell is defective when a voltage different from the predetermined voltage is measured for the battery cell.

The secondary hole of the battery cell determined to be defective is characterized in that the tertiary hole is processed in the re-processing step.

In the manufacturing of the composite panel, the display panel is coupled to the rear surface of the battery panel so that the sub-pixel of the display panel is inserted into the hole, or the sub-pixel of the display panel is disposed at a position corresponding to the hole. The battery panel is coupled to the rear surface of the battery panel, or the battery panel is coupled to the rear surface of the display panel.

A touch panel is provided on the light emitting surface of the display panel or on the top of the battery panel.

According to the method of manufacturing a display panel incorporating a solar cell according to the present invention, power is generated even while the display panel is being used, so that the power used by the generated power is supported, or the generated power can be stored and used.

In addition, the method of manufacturing a display panel coupled with a solar cell according to the present invention allows the display panel and the power generation panel to be installed in the same space, thereby enabling solar power generation without securing a separate space for installing the power generation panel; In addition, it is possible to increase the aesthetic and functional utility of the display panel.

In addition, the method for manufacturing a display panel in which a solar cell is combined according to the present invention minimizes defects that occur during the manufacturing of a panel in which the display panel and the power generation panel are combined, while discovering and normalizing defects using automated technology. It is possible to increase the efficiency.

1 is an exemplary diagram schematically illustrating a configuration of a display panel to which a solar cell is coupled according to the present invention;
2 is an exemplary diagram schematically illustrating a cross-section of a composite panel composed of a front light-emitting type display panel;
3 is an exemplary view schematically illustrating a blank area of the battery panel and the structure of the battery panel;
4 is a flow chart showing a process of forming a battery panel in which a blank area is formed according to the present invention.
FIG. 5 is an exemplary view showing the shape of a battery cell and a hole that is a blank area in each step of FIG. 4 .
6 is an exemplary view for further explaining the inspection step in FIG.

Hereinafter, embodiments of the present invention will be described so that those of ordinary skill in the art can easily implement them with reference to the accompanying drawings. In the accompanying drawings, it should be noted that the same reference numbers are used as much as possible when indicating the same configuration in other drawings. In addition, in the description of the present invention, if it is determined that a detailed description of a related known function or a known configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, certain features presented in the drawings are enlarged, reduced, or simplified for ease of description, and the drawings and components thereof are not necessarily drawn to scale. However, those skilled in the art will readily appreciate these details.

1 is an exemplary diagram schematically illustrating a configuration of a display panel to which a solar cell is coupled according to the present invention.

Referring to FIG. 1 , in the display panel to which the solar cell is coupled according to the present invention, the display panel 10 and the battery panel 50 are coupled to form a composite panel 100 .

In the display panel 10, a pixel P for displaying an image is formed. Specifically, in the display panel, pixels including a plurality of sub-pixels SP are formed at predetermined positions. The sub-pixels SP: SPR, SPG, and SPB are provided to form one pixel by combination such as red (R), green (G), and blue (B). Here, the sub-pixel SP may include a white sub-pixel or may be implemented using colors other than red (R), green (G), and blue (B), and the number of each sub-pixel SP may vary. It is not intended to limit the present invention by what is presented.

The sub-pixel SP is formed in a predetermined area on the substrate 11 constituting the display panel 10 . For example, as shown in FIG. 1 , in the sub-pixel SP, a red sub-pixel (SPR), a green sub-pixel (SPG), and a blue sub-pixel (SPB) are repeatedly formed in a predetermined order, and are formed by three sub-pixels. One pixel P may be defined.

To this end, one sub-pixel SP and the neighboring sub-pixels are formed to be spaced apart from each other by a predetermined distance. As shown, it may be formed in a matrix form. Through this, the non-pixel region 13 is formed between the sub-pixels SP and between the sub-pixels SP and the edge of the substrate. In addition, the sub-pixel SP may be arranged in a triangular shape or the sub-pixel SP may have a circular shape. However, in the present invention, for convenience of explanation, a description will be given with an example of a case in which a quadrangular-shaped sub-pixel is formed and the sub-pixels are arranged in a matrix form.

The sub-pixel SP may be an organic light emitting diode (OLED). In detail, each of the sub-pixels SP is formed to overlap the emission layer in the sub-pixel SP region, and a driving circuit for supplying data to the sub-pixel SP by being connected to a driving line and a scan line is provided. This driving circuit may be configured to include a plurality of thin film transistors. In addition, it includes an anode connecting the driving circuit and the sub-pixel SP, an organic light-emitting layer formed in the area of the sub-pixel SP, and a cathode connected to the organic light-emitting layer. In particular, the sub-pixel SP is sealed by a sealing layer. Such an encapsulation layer may be made for each sub-pixel (SP), and by encapsulating between the front substrate and the rear substrate constituting the display panel 10, the entire space between the circuit and the substrate 11 on which the organic light emitting layer is formed. However, the present invention is not limited thereto.

In particular, the display panel 10 may be a flexible display panel, and for this purpose, the substrate 11 is formed of a flexible synthetic resin such as polyimide, polycarbonate, PET, polyethylene, or a thin metal substrate such as stainless steel. can be In addition, the present invention is not limited as the substrate 11 can be manufactured using, in addition to the presented material, an equivalent material having low oxygen and moisture permeability and less mechanical damage if it is flexible.

To this end, the battery panel 50 is prepared by processing a metal substrate such as stainless steel or a thin metal plate into a thin film to form a solar cell on a flexible substrate 51 having flexibility. The battery panel 50 may also be manufactured using, as a substrate, a synthetic resin such as polyimide, polycarbonate, PET, or polyethylene in addition to a thin metal film, and the present invention is not limited thereto. For example, the solar cell may be CIGS (Copper Indium Gallium Selenide thin film solar cell) or an equivalent thereof, which enables high-efficiency power generation in low light and has flexible characteristics.

The battery panel 50 is attached to the rear surface of the light emitting surface of the display panel 10 , and a cell region 53 is formed in a space formed between the sub-pixels SP, that is, a region corresponding to the non-pixel region 13 . will be prepared In addition, an area corresponding to the sub-pixel SP is provided as a blank area 55 .

The composite panel 100 is provided by combining the above-described display panel 10 and the battery panel 50 . The composite panel 100 is formed by bonding or bonding the display panel 10 and the battery panel 50, respectively, after they are formed. And, the composite panel 100 is completed by sealing the bonded panels. To this end, the composite panel 100 may be encapsulated through thin film encapsulation (TFE) in which inorganic material layers and organic material layers are alternately formed and encapsulation is performed through this. The encapsulation layer may be formed to cover the upper surface of the substrate 101 on which the sub-pixel SP and the battery panel 50 are formed, and at this time, a side view of the composite panel 100 by covering a part of the edge of the substrate 101 will be sealed together.

2 is an exemplary diagram schematically illustrating a cross-section of a composite panel composed of a front light-emitting type display panel.

Referring to FIG. 2 , the display panel 10 made of OLED is divided into a front emission type and a bottom emission type according to the arrangement of the driving circuit and the organic emission layer. 2 is an exemplary view illustrating an example of the composite panel 100a in the case of a front emission type.

When the display panel portion is described first, a plurality of sub-pixels SP formed by the OLED are formed on the substrate 11 . Each of the sub-pixels SP includes a driving circuit 27 , an anode 25 , an organic light emitting layer 23 , and a cathode 21 . In this case, the top emission type is formed by sequentially stacking a driving circuit 27 , an anode 25 , an organic light emitting layer 23 , and a cathode 21 on a substrate 11 , and an encapsulation layer to cover the upper portion of the substrate (70) is formed. Then, the light is emitted in the direction of the encapsulation layer 70 . Here, the organic light emitting layer 25 is composed of a multilayer of an electron injection layer, an electron transport layer, a light emitting layer, a hole transport layer, and a hole injection layer as is known. In addition, the encapsulation layer may be formed by a TFE (Thin Film Encapsulation) method.

These sub-pixels SP are provided to be spaced apart from each other at a predetermined interval as shown. Through this, a non-pixel region, which is a region in which a sub-pixel is not formed, is provided between the sub-pixels SP.

In this non-pixel area, the battery panel 50 is seated and coupled to the display panel 10 . The battery panel 50 is formed such that the solar cells 53 are disposed in the non-pixel region of the substrate 51 , and is coupled to the display panel 10 . To this end, a blank region 55 corresponding to the non-pixel region is formed on the substrate 51 , and the battery cell 53 is formed in the blank region. The blank area 55 is formed to be larger than the sub-pixel SP, and is formed by removing the substrate 11 and the battery cell 53 .

Through this, the display panel 11 and the battery panel 50 are respectively formed, and the battery panel 50 is coupled in the direction of the display surface of the display panel 11 to constitute the composite panel 100 . That is, the composite panel 100 of the present invention is configured such that the sub-pixel SP and the battery cell 53 are disposed on the light emitting surface, that is, the sub-pixel SP and the battery cell 53 . An encapsulation layer 70 is formed to cover the

On the other hand, the composite panel 100 may be combined with a panel or screen for configuring a touch panel or a touch screen on the upper portion of the encapsulation layer. Such a touch means may be a panel formed of a film, glass, or synthetic resin. It is also possible to form a panel in which the display panel and the touch panel are integrally formed by performing the step of manufacturing the touch panel on the encapsulation layer without separately configuring such a touch unit. Since various technologies are known for such a touch means by known means and methods, a detailed description thereof will be omitted.

2 , the sub-pixels constituting the pixel P are disposed in the blank area 55 , that is, the sub-pixels SP may be configured to protrude from the blank area. In addition, although the display panel 10 is coupled to the rear surface of the battery panel 50 as shown in FIG. 2 , the sub-pixels SP do not protrude in the blank area and are located on the rear surface of the battery panel 50, It is also possible to form a composite panel configured to be disposed at a position corresponding to the blank area 55 . In this case, the composite panel is configured such that the blank area 55 serves as a window (or opening) through which light emitted from the sub-pixel SP is emitted.

3 is an exemplary view schematically illustrating a blank area of the battery panel and the structure of the battery panel.

Referring to FIG. 3 , in the battery panel 50 , a plurality of blank areas 55 are formed between the battery cells 53 . The blank area 55 is a hole formed through the battery panel 50 , and may be formed by cutting after the battery panel 50 is formed.

The shape and size of the blank area 55 depend on matters such as the light emitting area of the display panel 11 coupled to the battery panel 50, the size of the pixel P, and the sub-pixel SP, the configuration, the amount of power generation, and the aperture ratio. Depends on the manufacturer and is decided by the manufacturer.

The portion corresponding to the battery cell 53 of the battery panel 50 includes a front electrode 151 , a buffer layer 152 , an absorption layer 153 , a rear electrode 154 , and a substrate 155 .

The front electrode 151 is provided on the light incident surface of the battery cell 53 and is electrically connected to the buffer layer 152 . The front electrode 151 may be formed on the entire surface of the buffer layer 152 or may be formed in the form of a matrix-type electrode. The front electrode 151 may be formed of a transparent electrode formed of multiple metals such as indium, tin, zinc, or an oxide thereof.

The buffer layer 152 is formed between the front electrode 151 and the absorption layer 153 so that one surface is electrically connected to the front electrode 151 and the other surface is electrically connected to the absorption layer 153 . To this end, the buffer layer 152 is formed of an N-type semiconductor.

The absorption layer 153 is formed between the buffer layer 152 and the rear electrode 154 , and one surface is bonded to the buffer layer 152 , and the other surface is electrically connected to the rear electrode 154 . The absorption layer 153 is formed of a P-type semiconductor.

The back electrode 154 is provided between the substrate 155 and the absorption layer 153 and is electrically connected to the absorption layer 153 . The back electrode 154 is formed of an opaque metal electrode and is electrically insulated from the substrate 155 . The back electrode 154 may also be formed in the form of a plate formed on the entire surface of the absorption layer 153 or may be formed in the form of a matrix. An insulating layer for electrical insulation may be provided between the back electrode 154 and the substrate 155 .

A front electrode 151 , a buffer layer 152 , an absorption layer 153 , and a rear electrode 154 are stacked on the substrate 155 . The substrate 155 may be manufactured using a thin metal plate or a synthetic resin. In the present invention, the substrate 155 will be described mainly based on an example in which stainless steel is processed into a thin plate. In the present invention, the substrate 155 is a thinly processed metal or alloy, and a flexible substrate is used.

The battery cell 53 is formed by sequentially stacking a back electrode 154 , an absorption layer 153 , a buffer layer 152 , and a front electrode 151 on a substrate 155 .

In addition, the hole forming the blank area 55 is formed by cutting the battery cell 53 . Hereinafter, this will be described in detail with reference to other drawings.

4 is a flowchart illustrating a process of forming a battery panel in which a blank area is formed according to the present invention. FIG. 5 is an exemplary view showing the shape of a battery cell and a hole that is an empty area in each step of FIG. 4 . 6 is an exemplary view for further explaining the inspection step in FIG. 4 .

4 to 6 , the manufacturing process of the battery panel according to the present invention includes a battery cell forming step (S10), a primary hole processing step (S20), a secondary hole processing step (S30), an inspection step (S40), It may be configured to include a failure determination step (S50) and a hole reprocessing step (S60), and may further include a reference value setting step (S41). In addition, in the present invention, the manufacturing step of the display panel having the battery panel is realized by combining the battery panel manufactured through the above process and the display panel manufactured through a separate process in advance to form a composite panel (S70). .

The battery cell forming step ( S10 ) is a step of sequentially stacking the back electrode 154 , the absorption layer 153 , the buffer layer 152 , and the front electrode 151 on the substrate 155 to form a battery cell. In this battery cell formation step (S10), each layer may be formed by a deposition process. The battery cell thus formed is formed in a form in which each layer is stacked as shown in FIG. 5A .

The first hole processing step S20 is a step of forming a hole 55a in the battery cell. In the first hole processing step ( S20 ), holes 55a are formed at a predetermined position in the battery cell at a predetermined interval and size. In this case, the primary hole machining is performed by cutting the battery cell, and high-power laser, drilling, and punching may be used for cutting the battery cell. Drilling may be made by contacting a brush or needle vibrating at a high frequency to the surface of the battery cell.

In the first hole processing step S20 , a hole 55a passing from the front electrode 151 to the substrate 155 is formed, and may be processed in the form shown in FIG. 5B . In this case, when cutting is performed from the front electrode 151 , the hole 55a that is finally formed may be formed in such a way that the direct distance of the front electrode 151 is large and the diameter of the substrate 155 is small.

When a laser is used to form the hole 55a, a high-power laser capable of processing the hole 55a in the substrate 155 formed of a thin metal plate is used. Here, the definition of the high-power laser means a laser having an output capable of cutting the substrate 155 within a predetermined time, and in this case, it means an output of a level capable of cutting both the front electrode and the substrate 155 . That is, the output of the laser used at this time is most affected by the type and thickness of the substrate 155 , and the output may also be determined by the thickness of the front electrode 151 to the rear electrode 154 .

The secondary hole processing step ( S30 ) is a step in which secondary hole processing is performed to remove the burr 57 generated in the first hole processing step ( S20 ). This secondary hole processing step (S30) is a step in which re-machining of the hole (55a) formed in the first hole processing step (S20) is performed. Although this secondary hole processing step (S30) is performed using a laser, if precise processing is possible, punching and drilling may also be performed. However, in the present invention, only an example performed by a laser will be described in detail.

The secondary hole processing step ( S30 ) is performed to remove the burr 57 , which is a burnout portion generated due to the progress of the first hole processing step ( S20 ). During the first hole processing step (S20), the periphery of the hole 55a is cracked, deteriorated, burrs 57 such as shunts due to heat by high-power laser, pressure and heat by punching, heat and impact by high-vibration brushes. is generated In particular, when the primary hole processing is performed using a laser, the shunt 57 in which the buffer layer 152 melted by the laser contacts the rear electrode 154 or the front electrode 151 contacts the absorption layer 153 . ), which causes the problem that the generated power is not produced. Therefore, in order to remove it, a process of removing the burr 57 generated by the hole 55a by performing secondary hole processing is performed.

This secondary hole processing step (S30) is performed using a laser with a low power compared to the laser used for processing the primary hole. Here, the output of the laser for the secondary hole processing means an output at a level capable of removing the burrs 57 , that is, the front electrode 151 , the buffer layer 152 , and the absorption layer 153 . In particular, the laser output at this time is determined to a level capable of removing the front electrode 151 , the buffer layer 152 and the absorption layer 153 , which is the material and thickness of the front electrode 151 , the thickness of the buffer layer 152 , and the absorption layer. It is determined according to the thickness of (153), and it is determined to have a lower output compared to the output of the laser used for the first hole processing.

Meanwhile, the secondary hole processing step S30 may be performed with a predetermined width along the circumference of the primary hole 55a according to a preset reference value. This reference value may be a secondary hole diameter value calculated by the following reference value setting step ( S41 ). In addition, the secondary hole processing step S30 is performed only on the front electrode 151 , the buffer layer 152 , and the absorption layer 153 . Due to this, when the secondary hole processing step S30 is completed, the shape of the secondary hole 55b becomes similar to that of FIG. 5C . That is, the diameter (part A) of the front electrode 151 , the buffer layer 152 , and the absorption layer 153 becomes larger than that of the primary hole 55a by the secondary hole processing, while the rear electrode 154 and the substrate 155 are larger. ) of the hole diameter (part B) remains the same as that of the primary hole 55a. As a result, in the secondary hole 55b formed by the secondary hole processing step S30, a multi-stage hole is formed.

The inspection step ( S40 ) is a step of inspecting the battery cell 53 , that is, the battery panel 50 on which the secondary hole processing is made. In this inspection step ( S40 ), the battery panel 50 on which the secondary hole processing has been made is inspected by inspection equipment. To this end, in the inspection step (S40), the battery panel 50 is inspected by an inspection device equipped with a light supply device, a probe, and a voltage measuring device. The probe is connected to the front electrode 151 and the rear electrode 154 of the battery panel 50, respectively, and connects the front electrode 151 and the rear electrode 154 to the voltage measuring device. In the state in which such a connection is made, light is supplied to the battery panel 50 by the light supply device of the inspection device. And the voltage measuring device of the test device measures the voltage of the battery panel 50 connected to the probe.

Although it is shown in FIG. 4 as being carried out in the reference value setting step (s41), this is for convenience of explanation, and the reference value set in the reference value setting step (S41) is also used in the secondary hole machining (S30) and hole reprocessing step (S60) do.

The failure determination step S50 is a step of determining whether a failure has occurred by comparing the voltage value set in the reference value setting step S41 with the measured voltage value. In this failure determination step (S50), the control unit of the inspection apparatus compares the measured voltage of the battery panel with the reference voltage, and determines whether a measured voltage having a value similar to the reference voltage is output while light is supplied to the battery panel. In this process, if a measured voltage similar to the reference voltage is output, it is judged to be normal. Here, the reference voltage, that is, the voltage to be output from the battery panel may be 660 mV. This voltage can be understood as the threshold voltage of the PN junction. When a burr is formed in any one of the plurality of secondary holes 55b formed in the battery cell, the reference voltage is not measured by the inspection device. Therefore, it is possible to determine whether the battery panel is defective through whether the reference voltage is detected in a state in which light is supplied.

The hole reprocessing step (S60) is performed when the battery panel is determined to be defective in the defective determination step (S50). In the hole reprocessing step ( S60 ), the secondary hole ( 55b ) is re-cut to form the tertiary hole ( 55c ). This hole reprocessing step (S60) may be performed on the entire secondary hole (55b) or may be performed by checking only some secondary holes (55b).

The tertiary hole 55c is also formed for the front electrode 151 , the buffer layer 152 , and the absorption layer 153 like the secondary hole 55b . Through this, in the tertiary hole 55c, a hole having a larger diameter than that of the secondary hole 55b is formed, as in FIG. 5(d) . Here, the opening ratio, that is, the area open in the battery panel direction of the panel (display panel in the present invention) disposed on the rear surface of the battery panel is determined by the primary hole 55a, the secondary hole 55b, and the tertiary hole 55c. change does not occur This is because only the diameter of part A is changed by the machining of the secondary hole 55b and the tertiary hole 55c, and the diameter of part B maintains the initial diameter at the time of processing the primary hole 55a.

This tertiary hole (33c) processing is made by applying the secondary hole processing (S30) method in the same way. However, a re-processing reference value different from the reference value used for secondary hole processing (S30) is applied. This reprocessing reference value may be a value set in the reference value setting step (S41). Here, the reprocessing reference value may be set to a different value according to the reprocessing method.

Specifically, the tertiary hole 33c may be etched uniformly on all or some of the holes. In this case, the rework reference value may be a value indicating the diameter of the tertiary hole 55c. Through this, the A part of the hole is cut by machining all the holes or some selected holes with the uniform diameter shown in the reprocessing standard value, and through this, the tertiary hole 33b with a larger diameter of the A part than the secondary hole 55b is formed Reprocessing can be done as much as possible.

Alternatively, the rework reference value may be a determination reference value for determining the residual burr 57 of the tertiary hole 33c. In this case, it may be mainly provided for etching for re-processing of some holes, and when a re-processing reference value set as a judgment criterion is used, a defective hole detection process for finding a defective hole in the hole re-processing step (S60) may be performed. .

Such a defective hole detection process may be performed by reading an image or an image by an optical method, and may be used as a value for determining the degree of detection of the defective hole and the etching degree of the detected defective hole, that is, the reprocessing degree in the reading process.

The formation of the tertiary hole 55c in the hole reprocessing step S60 may be uniformly performed for all holes, but the hole 55b causing the defect is found by inspection, and only the tertiary hole 55b is found. A process for forming the hole 55c may be performed.

To this end, in the reprocessing process, an optical inspection different from the above-described inspection step (S40) may be performed. In this optical inspection step, an image or image of the battery panel in which the secondary hole 55b is formed is acquired, and a defective hole is detected among the secondary holes 55b by analyzing it. Such an image or image may be a real-time image or a real-time image obtained by an image or image acquisition means such as a camera, or may be a stored image or a stored image.

The image of the secondary holes 55b is an image or image obtained in the form of looking at the battery panel 50 in the direction of the front electrode 151 (hereinafter referred to as 'image' including the image and image) analyzes the secondary hole 55b and the surrounding battery cells 53 of the secondary hole. An example of this is shown in FIG. 6 .

When the hole 55 of the battery panel 50 is processed, a wound is left on the battery panel 50 by means such as a laser, a brush, or a needle, and such a wound is a burr 57 such as a shunt, deterioration, or crack. appear in the form As an example of such a wound, the shunt 57 appears in the form of concentric circles around the hole 55 . The portion where the burrs 57 are generated has different optical characteristics from other portions 53a of the general battery panel 55 (the portion not shaded in the battery panel of FIG. 6 ). Here, the optical characteristics may vary depending on the type of burr, that is, whether it is a shunt, a crack, or deterioration. Hereinafter, a description will be made taking the case where the burr 57 is a shunt as an example.) Specifically, the portion where the burr 57 is generated has a darker color than the portion 53a where the burr 57 is not generated. black) (hereinafter referred to as 'shading'), and this shadow becomes darker as it approaches the hole 55 and becomes blurred toward the non-occurring portion 53a of the burr 57 .

Using this, the burrs 57 can be checked, and the removal range of the remaining burrs 57 can be determined. Specifically, if the judgment value is set to define the burr 57 to what extent the ratio of shading in the above-mentioned re-processing reference value is set, the inspection device finds a boundary by the shading ratio that suits it, and transmits it to the re-processing device. The tertiary hole 55c is formed by etching up to a specified range of the selected hole 55 through the reprocessing apparatus.

More specifically, when the shade of the non-occurring portion 53a is 10% and the maximum shade of the burr 57 region is 90%, up to 65% is defined as the burr 57 area, The etching range is set from the vicinity of the entrance of (55) to the shaded portion, and the hole 55 in which the burr 57 having a shade of 65% or more exists is detected. Then, the burr is removed by etching to a position where the shading around the detected hole 55 is 65%.

Similarly, the reference value used in the secondary hole 55b forming step ( S30 ) may be a value set using the shading value as described above. For example, when the tertiary hole has a shade of 65%, the formation position of the secondary hole 55b may be formed by etching up to a position indicating a shade value of 80%. Here, 65% and 80% are presented as examples, and the actual shade value of the burr 57 may vary, and the present invention is not limited thereto.

However, in the case of the secondary hole 55b, since the burr 57 is essentially generated in the process of forming the primary hole 55a, the etching proceeds uniformly without a separate inspection process.

A reference value for forming the secondary hole 55b, a judgment value for re-processing, and a re-processing reference value for uniformly performing re-processing may be calculated by the reference value setting step S41. The reference value calculation in the reference value setting step S41 may be experimentally calculated. That is, in the process of producing the battery panel 50 and forming the hole 55 , in general, the diameter value of the secondary hole 55b can be statistically calculated through repeated production and measurement, and the secondary hole 55b can be statistically calculated. (55b) It is possible to calculate a stable tertiary hole diameter by repeating re-processing for defects that occur after formation.

To this end, it is possible to experimentally produce the battery panel 50 and form the hole 55 to calculate it, mass-produce the actual product through the fixing device, and obtain data about the reference value in the process of resolving the defect. it is possible

In particular, in the case of acquiring data on the reference value in the process of mass-producing the actual product, the optical inspection device is used in the secondary hole processing step (S30) and the hole reprocessing step (S60) until the reference value is confirmed. A process for calculating the etched position is performed, and when a certain diameter is calculated as a reference value by accumulating the calculated values, thereafter, the secondary arc 55b or the tertiary arc is performed through uniform etching without using an optical inspection device. It is possible to form the hole 55c.

Thereafter, when the re-processing of the hole is completed, the inspection step (S40) and subsequent processes are performed again.

The composite panel forming step ( S70 ) is a step of forming a composite panel by combining the battery panel 50 and the display panel 10 when it is determined that the composite panel is not defective as a result of the determination of the failure determination step ( S50 ).

In this composite panel forming step ( S70 ), various types of composite panels may be manufactured. Specifically, as shown in FIG. 2 , the display panel 10 and the battery panel 50 are combined to form a composite panel so that the sub-pixels formed on the display panel 10 are inserted into the holes 55 to be disposed.

Alternatively, the display panel 10 is coupled to be attached to the substrate 155 of the battery panel 50 , but the sub-pixel is disposed at a position corresponding to the hole 55 and is not inserted into the battery panel 50 . The panel 10 may be coupled. In this case, the light emission direction of the display panel 10 may be disposed to be the direction of the battery panel 50 , or may be a rear direction in which the battery panel 50 is not disposed.

When the display panel 10 and the battery panel 50 are combined as described above, an encapsulation layer may be formed to cover the display panel and the battery panel 50 . Alternatively, the display panel 10 and the battery panel 50 may be sealed and coupled to each other. For bonding the display panel 10 and the battery panel 50, a powder or liquid adhesive material that is cured by light such as ultraviolet rays may be used.

Meanwhile, a touch panel may be provided on an upper portion of the battery panel 50 or an upper portion of the display panel 10 . When the light emission direction of the display panel 10 faces the battery panel 50 , the touch panel may be provided to cover the battery panel 50 , and the light emission direction of the display panel 10 does not face the battery panel 50 . In the case where the display panel 10 is not formed, a touch panel may be provided on the front side of the display panel 10 .

In the above, it has been shown and described as a specific example to illustrate the technical idea of the present invention, but the present invention is not limited to the same configuration and operation as the specific embodiment as described above, and various modifications are within the limits that do not depart from the scope of the present invention. can be carried out. Accordingly, such modifications should be considered to fall within the scope of the present invention, and the scope of the present invention should be determined by the following claims.

10: display panel 50: battery panel
53: battery cell 55: hole
57: burr 151: front electrode
152: buffer layer 153: absorption layer
154: rear electrode 155: substrate

Claims (10)

manufacturing a battery panel by stacking a back electrode, an absorption layer, a buffer layer, and a front electrode on a substrate to form a battery cell;
a primary hole processing step of forming a primary hole in a predetermined position of the battery cell;
a secondary hole processing step of re-processing the primary hole to form a secondary hole;
an inspection step of inspecting the battery cell in which the secondary hole is formed;
a defect determination step by determining whether the battery cell is defective using the result of the inspection step;
a re-processing step of machining the secondary hole to form a tertiary hole when it is determined that the battery cell is defective in the defective determination step; and
When it is determined that the battery cell is normal in the defective determination step, a composite panel forming step of manufacturing a composite panel by combining with a pre-manufactured display panel;
The test step is performed by measuring the voltage of the probe of the test device connected to the front electrode and the back electrode of the battery cell, respectively, in a state in which light is supplied to the battery cell from the light source of the test device,
The inspection device determines that the battery cell is defective when a voltage different from the predetermined voltage is measured in the battery cell,
The secondary hole of the battery cell determined to be defective in the reprocessing step is the secondary hole of the battery cell determined to be defective while maintaining the diameter of the tertiary hole formed in the substrate as the initial diameter during the primary hole processing. The method of manufacturing a solar cell-coupled display panel, characterized in that the hole is re-cut to a diameter larger than the diameter of the front electrode side of the secondary hole to form the tertiary hole. The method of claim 1,
The method of claim 1, wherein the primary hole is formed by etching all of the substrate, the rear electrode, the absorption layer, the buffer layer, and the front electrode. 3. The method of claim 2,
The method of claim 1, wherein the secondary hole or the tertiary hole is formed by etching at least one of the absorption layer, the buffer layer, and the front electrode. 4. The method of claim 3,
The primary hole to the tertiary hole are formed by etching using a laser,
The method of claim 1, wherein the output of the laser used to form the primary hole and the laser used to form the secondary hole or the tertiary hole are different from each other. 4. The method of claim 3,
The method of claim 1 , wherein the first to third holes are etched to have a diameter defined by a predetermined reference value. delete delete delete The method of claim 1,
The composite panel forming step
The display panel is configured such that a sub-pixel of the display panel is inserted into the hole. coupled to the back of the battery panel, or
the display panel is coupled to the rear surface of the battery panel such that the sub-pixels of the display panel are disposed at positions corresponding to the holes;
A method of manufacturing a display panel coupled with a solar cell, wherein the battery panel is coupled to a rear surface of the display panel. 10. The method of claim 9,
A method of manufacturing a display panel coupled with a solar cell, wherein a touch panel is provided on a light emitting surface of the display panel or an upper portion of the battery panel.

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