Preparation equipment and method of LED display panel, storage medium and system

Abstract

The invention discloses a preparation device, method, storage medium and system of an LED display panel, and relates to the technical field of display, the preparation device of the LED display panel comprises a stock bin and a control device, the control device is connected with the stock bin, pixel raw materials used for preparing the LED display panel are placed in the stock bin, the pixel raw materials comprise sub-pixel raw materials with different color identifiers, and the sub-pixel raw materials are connected with the control device. Each sub-pixel raw material comprises a plurality of sub-pixels respectively corresponding to the brightness identifiers; and the control device is used for randomly extracting target sub-pixels from the sub-pixels corresponding to the plurality of brightness identifiers of each sub-pixel raw material, and combining the target sub-pixels corresponding to all the color identifiers to obtain pixels in the LED display panel. The technical problem that an LED display panel is uneven in display is solved.

Description

Technical Field

[0001] This application relates to the display field, and more particularly to equipment, methods, storage media, and systems for manufacturing LED display panels. Background Technology

[0002] LED (Light Emitting Diode) display panels have been widely used in various fields such as information display, security monitoring, large-screen conference display, and ultra-large-size TVs. However, in practical applications, it has been found that LED display panels may have local areas that are too bright or too dark, resulting in uneven display and thus reducing the user's viewing experience.

[0003] The above content is only used to help understand the technical solutions of the embodiments of this application, and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main objective of this application is to provide an apparatus, method, storage medium, and system for manufacturing LED display panels, aiming to address the technical problem of uneven display in LED display panels.

[0005] To achieve the above objectives, this application provides an LED display panel manufacturing apparatus. The LED display panel manufacturing apparatus includes a hopper and a control device. The control device is connected to the hopper. The hopper contains pixel raw materials for manufacturing LED display panels. The pixel raw materials include sub-pixel raw materials with different color identifiers. Each sub-pixel raw material includes multiple sub-pixels corresponding to different brightness identifiers.

[0006] The control device is used to prepare pixels in the LED display panel. The preparation process of each pixel in the LED display panel includes: the control device is used to randomly select target sub-pixels from the sub-pixels corresponding to the multiple brightness marks of each sub-pixel material, and combine the target sub-pixels corresponding to all color marks to obtain the pixels in the LED display panel.

[0007] In one embodiment, the silo includes multiple sub-silos connected to a control device. Each sub-silo includes a storage silo and a detachable silo. The detachable silo is detachably connected to a predetermined area outside the storage silo. The storage silo includes multiple layers, and the detachable silo includes multiple layers.

[0008] Sub-pixel raw materials stored in the same sub-bin have the same color identifier, while sub-pixel raw materials stored in different sub-bins have different color identifiers;

[0009] For the same storage bin, sub-pixels with the same color identifier and the same brightness identifier are placed on the same layer of the storage bin, and the storage bin can support storing multiple sub-pixels with different brightness identifiers.

[0010] Furthermore, to achieve the above objectives, this application also provides a method for manufacturing an LED display panel, applicable to an LED display panel manufacturing apparatus, the method comprising:

[0011] For each color identifier sub-pixel material, a target sub-pixel is randomly selected from the sub-pixels corresponding to each brightness identifier of the sub-pixel material.

[0012] Combine the target sub-pixels corresponding to all color identifiers to obtain the pixels within the LED display panel.

[0013] In one embodiment, the step of randomly selecting a target sub-pixel from the sub-pixels corresponding to each brightness indicator of the sub-pixel material for each color identifier includes:

[0014] Obtain the current extraction count; for each color identifier, search for the target brightness extraction identifier corresponding to the current extraction count in the preset random extraction path of the color identifier.

[0015] Extract the target sub-pixel corresponding to the target brightness extraction mark from the storage bin containing the sub-pixel raw materials of the color mark;

[0016] The different color identifiers correspond to different preset random sampling paths. The preset random sampling path includes preset brightness sampling identifiers corresponding to different preset sampling times. There are multiple different preset brightness sampling identifiers in the same preset random sampling path.

[0017] In one embodiment, after the step of extracting the target sub-pixel corresponding to the target brightness extraction mark from the storage bin containing the sub-pixel raw material of the color mark, the method further includes:

[0018] After extracting all the target sub-pixels corresponding to each color identifier, the current extraction count is accumulated.

[0019] In one embodiment, the preset random sampling path corresponding to each color identifier is updated according to a preset period.

[0020] The updated preset random sampling paths are different.

[0021] In one embodiment, for each sub-bin in the LED display panel manufacturing equipment, if a complete material layer is detected in the storage bin of the sub-bin, the complete material layer is located at the storage bin, and the complete material layer is removed from the storage bin according to the complete material location.

[0022] Obtain the material preparation position of the material preparation layer in the detachable hopper of the sub-hopper, move the material preparation layer from the material preparation position to the material completion position, and move the material completion layer to the material preparation position;

[0023] The complete material layer is the layer in the sub-material bin that has no sub-pixels, and the prepared material layer is the layer in the detachable material bin that stores sub-pixels; in the same sub-material bin, the color identifier of the sub-pixels that the storage bin supports storing is the same as the color identifier of the sub-pixels that the detachable material bin supports storing.

[0024] In one embodiment, a replenishment prompt is output if it is detected that there is no material preparation layer in any of the removable hoppers in the LED display panel manufacturing equipment.

[0025] In addition, to achieve the above objectives, this application provides an LED display panel fabrication system, which includes the LED display panel fabrication equipment described above.

[0026] In addition, to achieve the above objectives, this application also provides a computer-readable storage medium storing a program for implementing a method for manufacturing an LED display panel. When the program for manufacturing an LED display panel is executed by a processor, it implements the steps of the method for manufacturing an LED display panel as described above.

[0027] In addition, to achieve the above objectives, this application also provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the LED display panel manufacturing method described above.

[0028] One or more technical solutions proposed in this application have at least the following technical effects: The LED display panel manufacturing equipment includes a silo and a control device. The control device is connected to the silo, and the silo contains pixel raw materials for manufacturing LED display panels. The pixel raw materials include sub-pixel raw materials with different color identifiers, and each sub-pixel raw material includes multiple sub-pixels corresponding to different brightness identifiers. The control device can then manufacture pixels in the LED display panel based on the pixel raw materials stored in the silo. The manufacturing process of each pixel in the LED display panel includes: the control device randomly selecting target sub-pixels from the multiple sub-pixels corresponding to different brightness identifiers of each sub-pixel raw material, and combining the target sub-pixels with different color identifiers to obtain the pixels in the LED display panel.

[0029] Since each pixel in the LED display panel is obtained by the control device randomly selecting target sub-pixels from the multiple brightness indicators corresponding to each sub-pixel material and combining target sub-pixels with different color indicators, the brightness indicators corresponding to each target sub-pixel of each pixel are random. Furthermore, since the target sub-pixels of each pixel are randomly selected, the brightness combinations corresponding to different pixels in the LED display panel (the combinations of brightness indicators of target sub-pixels with different color indicators) are also random, rather than being fixed according to a specific brightness combination. The multiple pixels in the LED display panel are not prepared according to the same brightness combination. This application prepares the pixels in the LED display panel through random brightness combinations, thereby allowing sub-pixels with different brightness indicators to be randomly distributed in various areas of the LED display panel, rather than concentrating sub-pixels with the same brightness indicator in the same area. Therefore, the LED display panel in this application will not have localized overbrightness or underbrightness, improving the display uniformity of the LED display panel. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with those described herein and, together with the specification, serve to explain the principles of those embodiments.

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of a module of an embodiment of the LED display panel fabrication equipment according to this application.

[0033] Figure 2 This is a schematic diagram of the sub-material bin module in the LED display panel fabrication equipment according to an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the storage bin and the removable bin in the LED display panel manufacturing equipment according to an embodiment of this application;

[0035] Figure 4 This is a schematic flowchart of one embodiment of the method for manufacturing an LED display panel according to this application.

[0036] Figure 5 This is a schematic diagram of the sub-pixels corresponding to multiple brightness indicators respectively in an example of the LED display panel manufacturing method of this application embodiment;

[0037] Figure 6 This is a schematic diagram of the random distribution of each sub-pixel in the LED display panel in the manufacturing method of the LED display panel according to an embodiment of this application;

[0038] Figure 7 This is a schematic diagram of the sub-pixel distribution in another example of the method for manufacturing an LED display panel according to an embodiment of this application.

[0039] Explanation of icon numbers:

[0040] 100, Control device; 200, Material bin; Y1~Yn, Sub-pixel raw materials; YL, Pixel raw materials; Z1~Zj, Sub-bins; CX1~CXj, Demountable bins; CL1~CLj, Storage bins; S1, Demountable bin from the frontal view; S2, Storage bin from the frontal view; p1~pb, Layers within the Demountable bin; q1~qa, Layers within the Storage bin.

[0041] The objectives, features, and advantages of the embodiments described in this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of the embodiments of this application and are not intended to limit the embodiments of this application.

[0043] To better understand the technical solutions of the embodiments of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0044] LED display panels have been widely used in information display, security monitoring, large-screen conference display, ultra-large-size TVs and other fields. However, in practical applications, it has been found that LED display panels may have some areas that are too bright or too dark, resulting in uneven display and thus reducing the user's viewing experience.

[0045] Furthermore, during the LED production process, when sub-pixels with the same color or brightness are used up, multiple manual material replacements are required, resulting in low material replacement efficiency and a reduced production material replacement frequency.

[0046] Therefore, this embodiment provides an LED display panel manufacturing apparatus. The LED display panel manufacturing apparatus includes a hopper and a control device. The control device is connected to the hopper, which contains pixel raw materials for manufacturing LED display panels. The pixel raw materials include sub-pixel raw materials with different color identifiers. Each sub-pixel raw material includes multiple sub-pixels corresponding to different brightness identifiers. The control device can then manufacture pixels in the LED display panel based on the pixel raw materials stored in the hopper. The manufacturing process of each pixel in the LED display panel includes: the control device randomly selecting target sub-pixels from the multiple sub-pixels corresponding to different brightness identifiers of each sub-pixel raw material, and combining the target sub-pixels with different color identifiers to obtain the pixels in the LED display panel.

[0047] Since each pixel in the LED display panel is obtained by the control device randomly selecting target sub-pixels from the multiple brightness indicators corresponding to each sub-pixel material and combining target sub-pixels with different color indicators, the brightness indicators corresponding to each target sub-pixel of each pixel are random. Furthermore, since the target sub-pixels of each pixel are randomly selected, the brightness combinations corresponding to different pixels in the LED display panel (the combinations of brightness indicators of target sub-pixels with different color indicators) are also random, rather than being fixed according to a specific brightness combination. The multiple pixels in the LED display panel are not prepared according to the same brightness combination. This application prepares the pixels in the LED display panel through random brightness combinations, thereby allowing sub-pixels with different brightness indicators to be randomly distributed in various areas of the LED display panel, rather than concentrating sub-pixels with the same brightness indicator in the same area. Therefore, the LED display panel in this application will not have localized overbrightness or underbrightness, improving the display uniformity of the LED display panel.

[0048] Furthermore, each sub-bin in this embodiment is equipped with a detachable hopper, in which a material preparation layer can be set up, thereby enabling automated material changing and improving material changing efficiency.

[0049] Based on this, embodiments of this application provide a method for manufacturing an LED display panel, referring to... Figure 1 , Figure 1This is a schematic diagram of the module connection of the LED display panel manufacturing method according to an embodiment of this application. The LED display panel manufacturing equipment includes a material bin 200 and a control device 100. The control device 100 is connected to the material bin 200. The material bin 200 contains pixel raw material YL for manufacturing LED display panels. The pixel raw material includes sub-pixel raw materials with different color identifiers. Each sub-pixel raw material includes multiple sub-pixels corresponding to brightness identifiers.

[0050] The control device 100 is used to prepare pixels in the LED display panel. The preparation process of each pixel in the LED display panel includes: the control device 100 randomly selects target sub-pixels from the sub-pixels corresponding to the multiple brightness indicators of each sub-pixel material, and combines the target sub-pixels with different color indicators to obtain pixels in the LED display panel.

[0051] It should be noted that the pixel material can be used to manufacture LED display panels. The pixel material can be stored in the hopper 200. The control device 100 can obtain the pixel material from the hopper 200 to manufacture the LED display panel, which can be a Mini LED display panel. Different colors are designated as red, green, and blue. Red can be represented by R, green by G, and blue by B. The sub-pixel material included in the pixel material can be R pixel material, G pixel material, and B pixel material, respectively. The multiple sub-pixels included in the sub-pixel material can be LED chips. For example, R pixel material can include LED chips corresponding to R, G pixel material can include LED chips corresponding to G, and B pixel material can include LED chips corresponding to B.

[0052] Each sub-pixel material may include multiple sub-pixels corresponding to different brightness indicators. Different brightness indicators result in different brightness levels for the sub-pixels. Sub-pixels with the same color indicator can have multiple different brightness levels. The brightness indicator can be represented numerically; a larger value indicates higher brightness, and a smaller value indicates lower brightness. In other embodiments, a smaller value may also indicate lower brightness, etc. This embodiment does not specifically limit this. Furthermore, the wavelengths corresponding to multiple sub-pixels with the same color indicator may differ, and sub-pixels with different wavelengths will also have different display effects. Therefore, this embodiment, by randomly distributing the sub-pixels on the LED display panel, facilitates the randomness of the wavelength distribution, thereby ensuring the uniformity of the panel display.

[0053] For example, refer to Figure 1 , Figure 1The hopper 200 contains sub-pixel materials Y1 to Yn. Each sub-pixel material can include multiple sub-pixels. For example, sub-pixel material Y1 can include sub-pixels 11 to 1m, where m can be the number of sub-pixels. m can be an integer, but this embodiment does not specifically limit this. Different brightness indicators correspond to different sub-pixels in the sub-pixel materials, and the same brightness indicator can also correspond to multiple sub-pixels. Yn is the sub-pixel material for the nth color indicator. Yn can also have m sub-pixels, and the number of sub-pixels in Yn can be different from the number of sub-pixels in Y1. Figure 1 The subpixels 1m and nm shown are just one example. For example, Y1 could be an R pixel material, Y2 could be a G pixel material, Y3 could be a B pixel material, and n could be 3.

[0054] For example, the multiple brightness markers corresponding to the red sub-pixel can be R1 to Rs, each corresponding to a different brightness. This embodiment does not specifically limit this. The multiple brightness markers corresponding to the green sub-pixel can be G1 to Gs, and the multiple brightness markers corresponding to the blue sub-pixel can be B1 to Bs. 's' represents the total number of brightness markers, which can be an integer, equal to m, less than m, or greater than m. This embodiment does not specifically limit this. The number of brightness markers is not specifically displayed in this embodiment; for example, it can be 12, 8, or 5, etc. In the hopper 200, there can be multiple sub-pixels with the same color marker and the same brightness marker. This embodiment does not specifically limit this.

[0055] The control device 100 can obtain pixel raw materials from the hopper 200 for use in preparing pixels within an LED display panel. The LED display panel is composed of multiple pixels, and each pixel is a combination of sub-pixels with different color identifiers. Each pixel includes a sub-pixel corresponding to red, blue, and green, respectively. The control device 100 randomly selects each target sub-pixel from sub-pixels with different brightness identifiers when preparing each pixel in the LED display panel. The control device 100 may also include a control module and an extraction device. The control module can control the extraction device to randomly extract target sub-pixels from the sub-pixels corresponding to multiple brightness identifiers of each pixel raw material, and combine the target sub-pixels with different color identifiers to obtain the pixels within the LED display panel. The extraction device can be a robotic arm or a conveyor channel, etc., and this embodiment does not specifically limit its use.

[0056] When the control device 100 is preparing the LED display panel, it will prepare each pixel in the LED display panel in sequence. The brightness combination of each pixel is not fixed and is random. That is, the brightness combination between two adjacent pixels can be different. The brightness combination refers to the brightness indicator of the red sub-pixel, the brightness indicator of the green sub-pixel and the brightness indicator of the blue sub-pixel within the same pixel.

[0057] In other embodiments, when the control device prepares the pixels in the display panel, each pixel in the display panel is composed of sub-pixels of different colors. Each pixel includes at least one sub-pixel corresponding to red, blue and green respectively. It can also be determined based on the actual situation that each pixel includes two sub-pixels corresponding to red, blue and green respectively. This embodiment does not make specific limitations on this. The pixel combination of each pixel in the display panel can be determined based on the actual situation.

[0058] In this embodiment, since each pixel in the LED display panel is obtained by the control device 100 randomly selecting target sub-pixels from the sub-pixels corresponding to multiple brightness indicators of each sub-pixel material and combining target sub-pixels with different color indicators, the brightness indicators corresponding to each target sub-pixel of each pixel are random. Since the target sub-pixels of each pixel are randomly selected, the brightness combinations corresponding to different pixels in the LED display panel (the combinations of brightness indicators of target sub-pixels with different color indicators) are also random, rather than being fixed according to a certain brightness combination to prepare the pixels in the LED display panel. The multiple pixels in the LED display panel are not prepared according to the same brightness combination. This application prepares the pixels in the LED display panel by random brightness combinations, so that sub-pixels with different brightness indicators can be randomly distributed in various areas of the LED display panel, rather than concentrating sub-pixels with the same brightness indicator in the same area. Therefore, the LED display panel in this application will not have local overbrightness or local underbrightness, thus improving the display uniformity of the LED display panel.

[0059] When subpixels with the same brightness level are too concentrated in the same LED display panel, and there are multiple subpixels with different brightness levels on the LED display panel, the LED display panel is prone to mosaic-like appearance. However, since subpixels with different brightness levels and colors can be randomly distributed in this embodiment, the mosaic-like appearance caused by the excessive concentration of subpixels with the same brightness level can be avoided, thereby improving the uniformity of the display and enhancing the user's viewing experience.

[0060] In one feasible embodiment, refer to Figure 2The silo 200 includes multiple sub-silos, which are connected to the control device 100. Each sub-silo includes a storage silo and a detachable silo. The detachable silo is detachably connected to a preset area outside the storage silo. The storage silo includes multiple layers, and the detachable silo includes multiple layers.

[0061] Sub-pixel raw materials stored in the same sub-bin have the same color identifier, while sub-pixel raw materials stored in different sub-bins have different color identifiers;

[0062] For the same storage bin, sub-pixels with the same color identifier and the same brightness identifier are placed on the same layer of the storage bin, and the storage bin can support storing multiple sub-pixels with different brightness identifiers.

[0063] It should be noted that the hopper 200 may include multiple sub-hoppers, each of which can be connected to the control device 100. Each sub-hopper can be placed independently. For example, the hopper 200 may include three sub-hoppers, each storing sub-pixel materials with different color identifiers. For instance, the sub-hoppers in the hopper 200 may be red, green, and blue sub-hoppers, respectively. The red sub-hopper can store sub-pixel materials with a red color identifier, the green sub-hopper can store sub-pixel materials with a green color identifier, and the blue sub-hopper can store sub-pixel materials with a blue color identifier. For example, Figure 2 The image shows the various sub-bins Z1 to Zj, each of which also includes a detachable hopper and a storage hopper. Figure 2 The exhibition also showcases the detachable hoppers CX1 to CXj and the storage hoppers CL1 to CLj.

[0064] Each sub-bin includes a storage bin and a removable bin. The storage bin can have multiple layers, such as 12 layers or 8 layers, depending on the actual situation. This embodiment does not specifically limit the number of layers in the storage bin. The control device 100 can extract sub-pixels from the storage bin for preparing pixels in the LED display panel. The control device 100 can extract the preparation layer from the removable bin, and can also move the finished layer from the storage bin to the removable bin, and move the preparation layer from the removable bin to the storage bin, thereby achieving automatic replenishment. For example, refer to... Figure 3 , Figure 3 The diagram shows any detachable hopper and storage silo. Figure 3 S1 is a front view schematic diagram of the detachable hopper from a frontal perspective. Figure 3 S2 is a frontal view diagram of the storage silo. Figure 3 To facilitate the distinction between detachable silos and storage silos, in Figure 3 The diagram shows an exploded view of the storage silo and the detachable silo. Figure 3In the diagram, P1, P2 to Pb are the layers within the detachable silo, q1 to q3, q3 to qi, and qi to qa are the layers within the storage silo, and a, b, and i are integers, with a being greater than or equal to i.

[0065] Subpixels with the same brightness and color identifiers can be placed on the same layer of the storage bin. Subpixels placed on different layers of the same storage bin can have different brightness identifiers. The same storage bin can support the placement of subpixels with multiple brightness identifiers, such as 4, 5, 6, and 12 types, etc. This embodiment does not specifically limit this. When preparing pixels in the display device, the control device 100 can randomly select subpixels from the storage bin.

[0066] Each sub-bin's detachable hopper can be detachably connected to a preset area outside the storage hopper. For example, it can be located at the top, bottom, or side of the storage hopper, depending on the actual situation. This embodiment does not impose specific limitations on this. The detachable hopper can also have multiple layers. The number of detachable hopper layers can be the same as, less than, or greater than the number of storage hopper layers, for example, half the number of storage hopper layers. This embodiment does not impose specific limitations on this. The detachable hopper can also store sub-pixel raw materials. In the same sub-bin, the color identifier of the sub-pixel raw materials stored in the detachable hopper is the same as the color identifier of the sub-pixel raw materials stored in the storage hopper. The detachable hopper can have a preparation layer and can also support the placement of a finished layer in the storage hopper. The preparation layer can store sub-pixel raw materials, and the finished layer is a layer without sub-pixel raw materials.

[0067] This embodiment achieves automated material replenishment by detachably connecting a removable hopper to the top of the storage hopper, thereby improving replenishment efficiency and reducing manual workload. For example, initially, each layer in the removable hopper is a preparation layer. During the LED display panel manufacturing process, finished material layers may gradually appear in the storage hopper. The control device 100 can then successively remove the finished material layers from the storage hopper, move the preparation layers in the removable hopper to the storage hopper, and move the finished material layers to the removable hopper. When the removable hopper is full of finished material layers, the removable hopper can be manually removed from the top of the storage hopper, and then the preparation layers can be manually placed into the removable hopper. The removable hopper can then be reconnected to the top of the storage hopper. Since manual replacement is not required every time a finished material layer appears in the storage hopper, the replenishment efficiency is improved, which also facilitates the improvement of the LED display panel manufacturing efficiency.

[0068] The brightness identifiers of sub-pixels stored in the same layer of the removable hopper can be the same, and the brightness identifiers of sub-pixels stored in different layers can be the same or different. This embodiment does not make specific limitations on this.

[0069] Furthermore, based on the above embodiments of this application, in the second embodiment of this application, the content that is the same as or similar to the above embodiments can be referred to the above description, and will not be repeated hereafter. Based on this, refer to... Figure 4 This embodiment also provides a method for manufacturing an LED display panel, including steps S10 to S20:

[0070] Step S10: For each color identifier sub-pixel material, randomly select the target sub-pixel from the sub-pixels corresponding to each brightness identifier of the sub-pixel material.

[0071] Step S20: Combine the target sub-pixels corresponding to all color identifiers to obtain the pixels in the LED display panel.

[0072] It should be noted that pixel raw materials can be used to manufacture LED display panels. Pixel raw materials can be stored in a silo and can be obtained from the silo to manufacture LED display panels. Different colors are designated as red, green, and blue. Red can be represented by R, green by G, and blue by B. The sub-pixel raw materials included in the pixel raw materials can be R pixel raw materials, G pixel raw materials, and B pixel raw materials, respectively.

[0073] Each sub-pixel material may include multiple sub-pixels corresponding to different brightness indicators. Different brightness indicators result in different brightness of the sub-pixels. Sub-pixels with the same color indicator may have multiple different brightness levels. The brightness indicator can be represented by a numerical value. The larger the value of the brightness indicator, the greater the brightness, and the smaller the value of the brightness indicator, the smaller the brightness. In other embodiments, the smaller the value of the brightness indicator, the smaller the brightness, etc. This embodiment does not specifically limit this.

[0074] For example, the multiple brightness markers corresponding to the red sub-pixel can be R1 to Rs, with the brightness increasing sequentially from R1 to Rs. The multiple brightness markers corresponding to the green sub-pixel can be G1 to Gs, and the multiple brightness markers corresponding to the blue sub-pixel can be B1 to Bs, where 's' represents the total number of brightness markers. This embodiment does not specify the exact number of brightness markers; for example, it could be 12, 8, or 5, etc. In the hopper, there can be multiple sub-pixels with the same color and brightness markers; this embodiment does not impose a specific limitation on this. For example, refer to... Figure 5 , Figure 5 The diagram shows the brightness of R1 to R4, G1 to G4, and B1 to B4.

[0075] An LED display panel is composed of multiple pixels. Each pixel in the LED display panel is composed of sub-pixels with different color identifiers. Each pixel includes a sub-pixel corresponding to red, blue, and green. The control device randomly selects each target sub-pixel from sub-pixels with different brightness identifiers when preparing each pixel in the LED display panel. For example, to facilitate understanding of this embodiment, let's take a brightness identifier of 4 as an example. (Refer to...) Figure 6 , Figure 6 The image shows a schematic diagram of the pixel distribution of an LED display panel, specifically illustrating the distribution of the sub-pixels corresponding to each of the RGB values. Figure 6 There are sub-pixels corresponding to R1~R4, G1~G4, and B1~B4, as shown in the figure. Figure 6 It can be seen that subpixels of different brightness are randomly distributed. This can also be seen by referring to... Figure 7 , Figure 7 This is a schematic diagram of the sub-pixel distribution of an LED display panel prior to this application, see reference. Figure 7 It can be seen that sub-pixels of the same brightness are concentrated in the same area, and thus... Figure 7 The displayed LED display panel may exhibit areas that are too dark or too bright. However, after applying the embodiments of this application, the distribution of each sub-pixel within the LED display panel can be referenced. Figure 6 As shown, this achieves a random distribution of each sub-pixel, improving the display uniformity of the LED display panel. In this embodiment... Figure 6 The distribution of each sub-pixel shown is just one example. Figure 6 This is for the purpose of understanding this embodiment and does not limit the distribution of each sub-pixel in the LED display panel.

[0076] For example, for each color identifier's sub-pixel material, a target sub-pixel is randomly selected from the sub-pixels corresponding to each brightness identifier of the sub-pixel material; all target sub-pixels corresponding to each color identifier are combined to obtain the pixel in the LED display panel. Each target sub-pixel in each pixel of each LED display panel is randomly selected from the sub-pixel material of the same color identifier, and each color identifier's sub-pixel material includes multiple brightness identifier sub-pixels.

[0077] In this embodiment, each pixel in the LED display panel is obtained by the control device randomly selecting target sub-pixels from the sub-pixels corresponding to multiple brightness indicators of each sub-pixel material and combining target sub-pixels with different color indicators. Therefore, the brightness indicators corresponding to each target sub-pixel of each pixel are random. Since the target sub-pixels of each pixel are randomly selected, the brightness combinations corresponding to different pixels in the LED display panel (the combinations of brightness indicators of target sub-pixels with different color indicators) are also random, rather than being prepared according to a fixed brightness combination. The multiple pixels in the LED display panel are not prepared according to the same brightness combination. This application prepares the pixels in the LED display panel by random brightness combinations, so that sub-pixels with different brightness indicators can be randomly distributed in various areas of the LED display panel, rather than concentrating sub-pixels with the same brightness indicator in the same area. Therefore, the LED display panel in this application will not have local overbrightness or local underbrightness, thus improving the display uniformity of the LED display panel.

[0078] In a feasible embodiment, step S10 further includes steps S11 to S12:

[0079] Step S11: Obtain the current number of extractions. For each color identifier, find the target brightness extraction identifier corresponding to the current number of extractions in the preset random extraction path of the color identifier.

[0080] Step S12: Extract the target sub-pixel corresponding to the target brightness extraction mark from the storage bin containing the sub-pixel raw material of the color mark;

[0081] Among them, different color indicators correspond to different preset random sampling paths, and the preset random sampling paths include preset brightness sampling indicators corresponding to different preset sampling times. There are multiple different preset brightness sampling indicators in the same preset random sampling path.

[0082] It should be noted that the current extraction count represents the number of extractions of sub-pixels with the same color identifier. Since a single pixel is composed of red, green, and blue sub-pixels, the control device simultaneously extracts the corresponding RGB sub-pixels when preparing pixels within the LED display panel. Therefore, at any given time, the current extraction count for each of the blue, green, and red sub-pixels is the same. Each extraction completes the preparation of a pixel within the LED display panel.

[0083] The preset random sampling path can be randomly generated, and different color identifiers correspond to different preset random sampling paths. During the fabrication of the LED display panel, multiple pixels need to be prepared, resulting in multiple samplings. The preset random sampling path describes the path for sampling sub-pixels of the same color identifier each time. The preset random sampling path includes multiple preset brightness sampling identifiers corresponding to different preset sampling numbers. Within the same preset random sampling path, adjacent preset sampling numbers are consecutive. For example, the preset random sampling path can sequentially include a preset number of preset sampling numbers, with the preset sampling numbers increasing sequentially. The preset number can be set based on actual conditions; for example, the preset number can be the number of times all sub-pixels in the storage bin are sampled, or it can be any number of times. This embodiment does not specifically limit this.

[0084] The preset brightness sampling identifiers corresponding to different preset sampling numbers can be the same or different, and there can be multiple different preset brightness sampling identifiers within the same preset random sampling path. In this embodiment, the preset brightness sampling identifiers corresponding to two adjacent preset sampling numbers within the same preset random sampling path can be different. The preset brightness sampling identifiers corresponding to the same preset sampling number in different preset random sampling paths can also be different, or they can be the same in other embodiments; this embodiment does not specifically limit this. The reason for setting different preset random sampling paths for different color identifiers in this embodiment is to ensure that the sub-pixels of different brightness identifiers are randomly distributed on the LED display panel, so as to avoid the sub-pixels of the same brightness identifier being concentrated in a local area of ​​the LED display panel, causing problems such as local over-darkness or local over-brightness.

[0085] Each layer in the storage bin has its own corresponding target brightness extraction identifier. The target brightness extraction identifiers of different layers in the same storage bin are different. The target brightness extraction identifier of any layer in the storage bin can be the position coordinates of that layer in the storage bin, or it can be the brightness identifier of the sub-pixel stored in that layer. The brightness identifiers of the sub-pixels stored in different layers in the same storage bin can be different.

[0086] For example, the current extraction count is obtained. For each color identifier, the target brightness extraction identifier corresponding to the current extraction count is found in the preset random extraction path of the color identifier. The target sub-pixel corresponding to the target brightness extraction identifier is extracted from the storage bin of the sub-pixel raw material of the color identifier.

[0087] For example, when the color identifier is red, the target brightness extraction identifier is the red target brightness extraction identifier, and the target subpixel is the target red subpixel; when the color identifier is green, the target brightness extraction identifier is the green target brightness extraction identifier, and the target subpixel is the target green subpixel; when the color identifier is blue, the target brightness extraction identifier is the blue target brightness extraction identifier, and the target subpixel is the target blue subpixel.

[0088] For example, a red target brightness extraction marker corresponding to the current extraction count can be found in a preset random extraction path marked in red, and the target red sub-pixel corresponding to the red target brightness extraction marker can be extracted from the red storage bin. Similarly, a blue target brightness extraction marker corresponding to the current extraction count can be found in a preset random extraction path marked in blue, and the target blue sub-pixel corresponding to the blue target brightness extraction marker can be extracted from the blue storage bin. Likewise, a green target brightness extraction marker corresponding to the current extraction count can be found in a preset random extraction path marked in green, and the target green sub-pixel corresponding to the green target brightness extraction marker can be extracted from the green storage bin. Target red, target green, and target blue sub-pixels can be combined to prepare pixels in an LED display panel. The brightness of the target red, target green, and target blue sub-pixels can be different. During the pixel preparation process of the LED display panel, the brightness combinations between adjacent pixels prepared sequentially are different.

[0089] In a feasible embodiment, after step S12, step S121 is further included: after extracting all the target sub-pixels corresponding to the color identifiers, the current extraction count is accumulated.

[0090] It should be noted that the initial sampling count can be 1. Each time a pixel is obtained through combination, the current sampling count can be incremented, for example, by 1. For instance, after sampling the target red, target green, and target blue sub-pixels corresponding to the current sampling count, the current sampling count is incremented to update it. After updating the current sampling count, the process can return to the step: for each color identifier, find the target brightness sampling identifier corresponding to the current sampling count in the preset random sampling path of the color identifier. This allows for the continuous fabrication of multiple pixels in the display device, improving fabrication efficiency.

[0091] In a feasible embodiment, the method for manufacturing an LED display panel further includes step A10: updating the preset random sampling path corresponding to each color identifier according to a preset cycle;

[0092] The updated preset random sampling paths are different.

[0093] It should be noted that the preset cycle can be set based on the actual situation. For example, the preset cycle can be a preset duration or a preset number of times. The preset duration can be, for example, 1 hour, the time required to use up the sub-pixel raw materials in the storage bin, or the time required to prepare an LED display panel, etc. This embodiment does not make specific limitations on this. The preset number of times can be 12 times, 100 times, the number of extractions required to use up the sub-pixel raw materials in the storage bin, or the number of extractions required to prepare an LED display panel, etc. This embodiment does not make specific limitations on this.

[0094] For the same color identifier, the preset random sampling path before the update is different from the preset random sampling path after the update, and the updated preset random sampling paths corresponding to each color identifier are also different. This facilitates the random distribution of brightness among the sub-pixels in the LED display panel during manufacturing, thereby ensuring the uniformity of the LED display panel display. In this embodiment, the brightness distribution of the sub-pixels corresponding to different LED display panels can also be different.

[0095] In other embodiments, the preset random sampling path can also be executed cyclically, and this embodiment does not specifically limit this. The path length of the preset random sampling path corresponding to different color markers can be the same, and the path length refers to the value of the maximum preset number of samplings in the preset random sampling path.

[0096] In a feasible embodiment, the method for manufacturing the LED display panel further includes steps B10 to B20:

[0097] Step B10: For each sub-bin in the LED display panel manufacturing equipment, if a complete material layer is detected in the storage bin of the sub-bin, the complete material layer is located in the storage bin, and the complete material layer is removed from the storage bin according to the complete material location.

[0098] Step B20: Obtain the material preparation position of the material preparation layer in the detachable hopper of the sub-hopper, move the material preparation layer from the material preparation position to the finished material position, and move the finished material layer to the material preparation position.

[0099] Among them, the finished material layer is the layer without sub-pixels in the sub-material bin, and the prepared material layer is the layer with sub-pixels stored in the detachable material bin; in the same sub-material bin, the color code of the sub-pixels that the storage bin supports storing is the same as the color code of the sub-pixels that the detachable material bin supports storing.

[0100] It should be noted that automatic material replenishment can also be achieved in this embodiment. The number of sub-pixels stored in each layer of the material storage bin is not necessarily the same. Therefore, in the process of manufacturing the LED display panel, one or more layers in the material storage bin may run out of sub-pixels first, and the layer that runs out of sub-pixels can be regarded as the material replenishment layer.

[0101] There can also be a preparation layer in the detachable hopper. The preparation layer stores sub-pixels with the same color identifier. The brightness identifiers of each sub-pixel in the same preparation layer are the same. The brightness identifiers of sub-pixels in different layers of the same detachable hopper can be different.

[0102] The "finished material position" refers to the location of the finished material layer in the storage bin, while the "prepared material position" refers to the location of the prepared material layer in the detachable bin. The finished material layer can be moved from the finished material position to the prepared material position, and vice versa, thereby enabling timely replenishment of the storage bin and continuous production of display devices, thus improving production efficiency.

[0103] For example, for each sub-bin, if a complete material layer is detected in the storage bin of the sub-bin, the complete material layer's position in the storage bin can be obtained. Based on the complete material position, the complete material layer is removed from the storage bin. For example, image detection can be used to identify the surface of each layer in the storage bin to determine whether there is still raw material corresponding to the sub-pixel on the surface. Layers without sub-pixels can be determined as complete material layers. Alternatively, data recording can be used to determine whether there is a complete material layer in the storage bin. For example, for each layer in the storage bin, initially, the number of sub-pixels in the layer can be identified using image detection. At the same time, the number of sub-pixels removed from the layer by the control device each time can be recorded. Then, each time a sub-pixel is removed from the layer, the number of remaining sub-pixels in the layer can be determined. When the number of remaining sub-pixels in the layer is determined to be 0, the layer can be determined to be a complete material layer.

[0104] In other embodiments, the presence of a complete layer in the storage bin can be detected by detecting the weight of each layer in the storage bin, and layers with a weight less than or equal to a preset weight threshold can be identified as complete layers.

[0105] When multiple finished material layers exist in the storage bin, any target finished material layer can be identified among the finished material layers. After the target finished material layer is removed and a reserve material layer exists in the original position of the target finished material layer in the storage bin, the target finished material layer is moved to the detachable bin, and then the finished material layers in the storage bin are replaced in sequence.

[0106] The preparation position of any preparation layer in the removable hopper of the sub-material bin can be obtained, and any preparation layer can be moved from the preparation position to the finished position in the storage bin. The removable hopper can contain both a finished layer and a preparation layer, or only a finished layer, or only a preparation layer; this embodiment does not impose specific limitations on this. The brightness indicator of the preparation layer can be the same as or different from the brightness indicator of the finished layer; this embodiment does not impose limitations on this. When changing materials, the brightness may vary depending on the batch of sub-pixel raw materials. Therefore, after the preparation layer is moved to the storage bin, the sub-pixels within the storage bin can still achieve a random distribution of sub-pixel brightness to ensure the uniformity of the LED display panel display.

[0107] In a feasible embodiment, the method for manufacturing an LED display panel further includes step X10: if it is detected that there is no material preparation layer in any of the removable hoppers in the LED display panel manufacturing equipment, a material replenishment prompt is output.

[0108] It should be noted that, if no spare material layer is detected in the removable hopper, a material replacement prompt can be output to remind the user to replace all the empty material layers in the removable hopper with spare material layers. In other embodiments, the user can also directly replace the removable hopper, for example, by directly replacing a removable hopper without a spare material layer with one that has a spare material layer. This embodiment does not specifically limit this.

[0109] For example, initially, the removable hopper may contain only reserve layers. When a reserve layer moves within the removable hopper, a movement tag can be identified at its location. The presence of movement tags at each layer's location within the removable hopper indicates the presence of a complete layer. When a reserve layer needs to be removed from the removable hopper, the layer without a movement tag can be retrieved. Alternatively, weight detection can be used to determine if each layer in the removable hopper is a complete layer. For instance, layers with a weight less than or equal to a preset weight threshold are complete layers, while layers with a weight greater than the preset weight threshold are reserve layers. This embodiment does not impose specific limitations on this; the determination can be based on actual circumstances. For example, it could also be determined that the removable hopper does not contain a reserve layer if the overall weight of the removable hopper is less than a preset overall weight threshold.

[0110] This embodiment improves replenishment efficiency by outputting replenishment prompts.

[0111] The LED display panel fabrication equipment provided in this application adopts the LED display panel fabrication method in the above embodiments, aiming to solve the technical problem of uneven LED display panel display. Compared with the prior art, the beneficial effects of the LED display panel fabrication method provided in this application are the same as those of the LED display panel fabrication method provided in the above embodiments, and other technical features in the LED display panel fabrication equipment are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0112] The LED display panel fabrication system provided in this application includes the aforementioned LED display panel fabrication equipment. The LED display panel fabrication system employs the LED display panel fabrication method described in the above embodiments, thus addressing the technical problem of uneven LED display panel display. Compared with the prior art, the beneficial effects of the electronic device provided in this application are the same as those of the LED display panel fabrication method provided in the above embodiments, and other technical features of this electronic device are the same as those disclosed in the previous embodiment method, and will not be repeated here.

[0113] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0114] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0115] This embodiment provides a computer-readable storage medium having computer-readable program instructions stored thereon, which are used to execute the LED display panel manufacturing method in the above embodiment one.

[0116] The computer-readable storage medium provided in this application embodiment may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor devices, apparatuses, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable EPROM (Electrical Programmable Read Only Memory) or flash memory, optical fiber, portable compact disk CD-ROM (compact discread-only memory), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution device, apparatus, or apparatus. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0117] The aforementioned computer-readable storage medium may be included in an electronic device or may exist independently without being assembled into the preparation device.

[0118] The aforementioned computer-readable storage medium carries one or more programs that, when executed by the device, cause the fabrication device to: for each color-labeled sub-pixel material, randomly select target sub-pixels from the sub-pixels corresponding to each brightness label of the sub-pixel material; and combine all the target sub-pixels corresponding to each color label to obtain pixels within the LED display panel.

[0119] Computer program code for performing the operations of this disclosure can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a LAN (local area network) or WAN (wide area network)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0120] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of devices, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based device that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0121] The modules described in the embodiments of this disclosure can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0122] The computer-readable storage medium provided in this application embodiment stores computer-readable program instructions for executing the above-described LED display panel fabrication method, aiming to address the technical problem of uneven display in LED display panels. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application embodiment are the same as the beneficial effects of the LED display panel fabrication method provided in the above embodiments, and will not be repeated here.

[0123] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the LED display panel manufacturing method described above.

[0124] The computer program product provided in this application aims to address the technical problem of uneven display in LED display panels. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as those of the LED display panel manufacturing method provided in the above embodiments, and will not be repeated here.

[0125] The above are merely preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structural or procedural transformations made using the description and drawings of the present application, or direct or indirect applications in other related technical fields, are similarly included within the patent processing scope of the present application.

Claims

1. An apparatus for manufacturing an LED display panel, characterized in that, The LED display panel manufacturing equipment includes a hopper and a control device. The control device is connected to the hopper. The hopper contains pixel raw materials for manufacturing LED display panels. The pixel raw materials include sub-pixel raw materials with different color identifiers. Each sub-pixel raw material includes multiple sub-pixels corresponding to different brightness identifiers. The control device is used to prepare pixels in the LED display panel. The preparation process of each pixel in the LED display panel includes: the control device is used to randomly select target sub-pixels from the sub-pixels corresponding to the multiple brightness marks of each sub-pixel material, and combine the target sub-pixels corresponding to all color marks to obtain the pixels in the LED display panel.

2. The LED display panel manufacturing apparatus as described in claim 1, characterized in that, The hopper includes multiple sub-hoppers, each sub-hopper being connected to a control device. Each sub-hopper includes a storage hopper and a detachable hopper. The detachable hopper is detachably connected to a preset area outside the storage hopper. The storage hopper includes multiple layers, and the detachable hopper also includes multiple layers. Sub-pixel raw materials stored in the same sub-bin have the same color identifier, while sub-pixel raw materials stored in different sub-bins have different color identifiers; For the same storage bin, sub-pixels with the same color identifier and the same brightness identifier are placed on the same layer of the storage bin, and the storage bin can support storing multiple sub-pixels with different brightness identifiers.

3. A method for manufacturing an LED display panel, characterized in that, An apparatus for manufacturing LED display panels, wherein the method for manufacturing the LED display panels includes: For each color identifier sub-pixel material, a target sub-pixel is randomly selected from the sub-pixels corresponding to each brightness identifier of the sub-pixel material. Combine the target sub-pixels corresponding to all color identifiers to obtain the pixels within the LED display panel.

4. The method for preparing an LED display panel as described in claim 3, characterized in that, The step of randomly selecting a target sub-pixel from the sub-pixels corresponding to each brightness indicator of each color identifier sub-pixel material includes: Obtain the current extraction count; for each color identifier, search for the target brightness extraction identifier corresponding to the current extraction count in the preset random extraction path of the color identifier. Extract the target sub-pixel corresponding to the target brightness extraction mark from the storage bin containing the sub-pixel raw materials of the color mark; The different color identifiers correspond to different preset random sampling paths. The preset random sampling path includes preset brightness sampling identifiers corresponding to different preset sampling times. There are multiple different preset brightness sampling identifiers in the same preset random sampling path.

5. The method for preparing an LED display panel as described in claim 4, characterized in that, After the step of extracting the target sub-pixel corresponding to the target brightness extraction mark from the storage bin containing the sub-pixel raw material of the color mark, the method further includes: After extracting all the target sub-pixels corresponding to each color identifier, the current extraction count is accumulated.

6. The method for preparing an LED display panel as described in claim 4, characterized in that, The method further includes: According to a preset cycle, update the preset random sampling path corresponding to each of the aforementioned color identifiers; The updated preset random sampling paths are different.

7. The method for preparing an LED display panel as described in claim 3, characterized in that, The method further includes: For each sub-bin in the LED display panel manufacturing equipment, if a complete material layer is detected in the storage bin of the sub-bin, the complete material layer is located in the storage bin, and the complete material layer is removed from the storage bin according to the complete material location. Obtain the material preparation position of the material preparation layer in the detachable hopper of the sub-hopper, move the material preparation layer from the material preparation position to the material completion position, and move the material completion layer to the material preparation position; The complete material layer is the layer in the sub-material bin that has no sub-pixels, and the prepared material layer is the layer in the detachable material bin that stores sub-pixels; in the same sub-material bin, the color identifier of the sub-pixels that the storage bin supports storing is the same as the color identifier of the sub-pixels that the detachable material bin supports storing.

8. The method for preparing an LED display panel as described in claim 3, characterized in that, The method further includes: If a material replenishment prompt is output when it is detected that there is no material preparation layer in any of the removable hoppers in the LED display panel manufacturing equipment, a material replenishment prompt will be output.

9. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and the computer-readable storage medium stores a program for implementing a method for manufacturing an LED display panel. The program for implementing the method for manufacturing an LED display panel is executed by a processor to implement the steps of the method for manufacturing an LED display panel as described in any one of claims 3 to 8.

10. A system for manufacturing an LED display panel, characterized in that, The LED display panel fabrication system includes the LED display panel fabrication equipment as described in any one of claims 1 to 2.

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