Printed circuit board (PCB) ink exposure device and PCB ink printing system

Abstract

The utility model relates to the technical field of printed circuit board (PCB) ink printing, in particular to a PCB ink exposure device and a PCB ink printing system. The PCB ink exposure device comprises: an exposure chamber; the carrying platform is arranged in the exposure chamber and is suitable for placing a to-be-exposed PCB (Printed Circuit Board); the light source system is arranged in the exposure chamber, is positioned above the carrying table and is suitable for irradiating light to the PCB to be exposed on the carrying table; the light source system comprises a first light source, a second light source and a refraction device, the first light source and the second light source are suitable for emitting light to the refraction device; the refraction device is suitable for respectively refracting light rays emitted by the first light source and the second light source to the PCB to be exposed; the first light source and the second light source are arranged in the same exposure chamber. The PCB ink exposure device and the PCB ink printing system provided by the utility model are better in exposure effect, and can avoid local color cast.

Description

Technical Field

[0001] The utility model relates to the technical field of optical elements, in particular to a PCB board ink exposure device and a PCB board ink printing system. Background Art

[0002] Mini LED display is mainly used in the new display field, providing backlight source for the display screen through dense LED lamp beads. Mini LED backlight is to mount the LED surface on the PCB or FPC surface printed with white ink. Due to the dense light source, there are great requirements for the reflectivity of the ink, which is an average of more than 85%. Otherwise, the white ink will have problems such as color deviation or black spots.

[0003] Mini LED backlight PCB is generally printed with white ink on the whole board, with a thickness of about 27-35um. The printing process includes printing ink-pre-baking-exposure-development-baking-gold-washing and drying. Since the ink is in a semi-cured state when printed on the PCB board, it is easy to have problems such as color deviation after exposure. The white ink after development is prone to oil loss in spots; in addition, after being treated with gold solution, the surface of the white ink will have a local reddening (color deviation) phenomenon, so the reflectivity requirements cannot be met, resulting in unsatisfactory display effects of the Mini LED display.

[0004] Therefore, a solution is needed to solve the problem of unsatisfactory exposure effect during PCB ink printing. Utility Model Content

[0005] In view of this, the utility model provides a PCB board ink exposure device and a PCB board ink printing system to solve the problem of unsatisfactory exposure effect during PCB board ink printing in the prior art.

[0006] The utility model provides a PCB board ink exposure device, comprising: an exposure chamber; a carrier, which is arranged in the exposure chamber and is suitable for placing a PCB board to be exposed; a light source system, which is arranged in the exposure chamber and located above the carrier, and is suitable for irradiating light to the PCB board to be exposed on the carrier; wherein the light source system comprises: a first light source, a second light source and a refraction device; the first light source and the second light source are suitable for respectively emitting light to the refraction device; the refraction device is suitable for respectively refracting the light emitted by the first light source and the second light source to the PCB board to be exposed; the first light source and the second light source are arranged in the same exposure chamber.

[0007] Optionally, there is an angle between a line connecting the first light source and the refraction device and a line connecting the second light source and the refraction device, and the angle is greater than or equal to 90° and less than or equal to 180°.

[0008] Optionally, the angle is 180°.

[0009] Optionally, the refraction device has a first state of refracting the light emitted by the first light source toward the PCB board to be exposed and a second state of refracting the light emitted by the second light source toward the PCB board to be exposed; when the refraction device is in the first state, it only refracts the light emitted by the first light source; when the refraction device is in the second state, it only refracts the light emitted by the second light source.

[0010] Optionally, the refraction device includes a refraction mirror and a rotating shaft; in a first state, the refraction mirror is rotated to a first direction via the rotating shaft to refract the light emitted by the first light source to the PCB board to be exposed; in a second state, the refraction mirror is rotated to a second direction via the rotating shaft to refract the light emitted by the second light source to the PCB board to be exposed.

[0011] Optionally, the refraction device includes a first refractor, a second refractor and a displacement assembly; in a first state, the first refractor is moved to a first position by the displacement assembly, and refracts the light emitted by the first light source to the PCB board to be exposed; in a second state, the second refractor is moved to a second position by the displacement assembly, and refracts the light emitted by the second light source to the PCB board to be exposed.

[0012] Optionally, the first refractor and the second refractor are arranged in the same displacement component; or the first refractor and the second refractor are arranged in different displacement components respectively.

[0013] Optionally, the carrier includes: an exposure platform, the light emitted by the refraction device is suitable for irradiating the exposure platform; a loading platform for placing a PCB board to be exposed and about to be exposed; and a unloading platform for placing a PCB board that has completed the exposure operation. The PCB board ink exposure device also includes: a carrying component; the carrying component is suitable for transferring the PCB board to be exposed and about to be exposed to the exposure platform, and is suitable for transferring the PCB board that has completed the exposure operation to the unloading platform.

[0014] Optionally, the wavelength of light emitted by the first light source is 405 nm; the wavelength of light emitted by the second light source is 425 nm.

[0015] The utility model also provides a PCB board ink printing system, comprising the PCB board ink exposure device provided by the utility model.

[0016] The beneficial effects of the utility model are:

[0017] The PCB board ink exposure device provided by the utility model arranges a first light source and a second light source in the same chamber, and uses a refraction device to respectively refract the light emitted by the first light source and the second light source to the carrier, so that the first light source and the second light source can be set as light sources of different wavelengths, and light irradiation and exposure of different wavelength bands are carried out in the same chamber in succession, and the ink undergoes two light reactions in succession. The light sources of different wavelength bands have complementary effects on the internal structure of the ink, which can greatly improve the exposure effect of the ink.

[0018] The utility model provides a PCB board ink printing system, including a PCB board ink exposure device provided by the utility model. By setting a first light source and a second light source in the same chamber, the light emitted by the first light source and the light emitted by the second light source are refracted to the carrier by using a refraction device, so that the first light source and the second light source can be set as light sources of different wavelengths, and light irradiation and exposure of different wavelength bands can be performed in the same chamber in sequence, and the ink can be photoreacted twice in sequence. The light sources of different wavelength bands have a complementary effect on the internal structure of the ink, which can greatly improve the exposure effect of the ink. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic structural diagram of a PCB ink exposure device of the utility model;

[0021] Figure 2 This is a schematic diagram of the optical path of the PCB ink exposure device according to one embodiment of the utility model when the refraction device is in the first state;

[0022] Figure 3 This is a schematic diagram of the light path of a PCB board ink exposure device according to an embodiment of the utility model when the refraction device is in the second state. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0024] Example 1

[0025] This embodiment provides a method for manufacturing a transmissive thin film window structure. Figure 1-Figure 3 ,include:

[0026] The utility model provides a PCB board ink exposure device, comprising:

[0027] exposure chamber (chamber walls not shown in the figure);

[0028] The carrier is arranged in the exposure chamber and is suitable for placing the PCB board 8 to be exposed; the PCB board 8 to be exposed has been printed with ink and has been pre-baked.

[0029] The light source system is arranged in the exposure chamber, located above the stage, and is suitable for irradiating light to the PCB board 8 to be exposed on the stage; the light is irradiated to the PCB board 8 to be exposed through the mask plate 7 to achieve exposure.

[0030] Wherein, the light source system includes: a first light source 4, a second light source 5 and a refraction device; the first light source 4 and the second light source 5 are suitable for emitting light to the refraction device respectively; the refraction device is suitable for refracting the light emitted by the first light source 4 and the second light source 5 to the PCB board to be exposed respectively, so that the PCB board to be exposed has; the first light source and the second light source are arranged in the same exposure chamber.

[0031] The PCB board ink exposure device provided in the present embodiment arranges a first light source 4 and a second light source 5 in the same chamber, and utilizes a refraction device to respectively refract the light emitted by the first light source 4 and the light emitted by the second light source 5 to the carrier, so that the first light source 4 and the second light source 5 can be set as light sources of different wavelengths, and light irradiation and exposure of different wavelength bands can be performed successively in the same chamber, and the ink undergoes two photoreactions successively. The light sources of different wavelength bands have complementary effects on the internal structure of the ink, which can greatly improve the exposure effect of the ink.

[0032] In a specific embodiment, the wavelength of light emitted by the first light source 4 is 405nm; the wavelength of light emitted by the second light source 5 is 425nm. The inventors have found that sequential exposure of light with a wavelength of 405nm and light with a wavelength of 425nm can achieve a complementary effect without the occurrence of local color cast or color cast points.

[0033] Furthermore, there is an angle between a line connecting the first light source 4 and the refraction device and a line connecting the second light source 5 and the refraction device, and the angle is greater than or equal to 90° and less than or equal to 180°.

[0034] Since the exposure time is relatively short, in the industry, for considerations of power consumption and energy saving, the two light sources are usually set to be always on and will not be turned on and off repeatedly. By setting the two light sources to have an angle greater than or equal to 90° and less than or equal to 180° with the line connecting the refraction device, it is easier for the refraction device to find a position when refraction so that when refraction is performed, the refraction device will not refract the other side at the same time, thereby avoiding the problem of uneven exposure caused by the prolonged exposure time of a certain medium wavelength light in a local area.

[0035] In a specific embodiment, the angle is 180°. That is, the first light source 4 and the second light source 5 are arranged opposite to each other, and the refraction device is arranged between them. In this way, the mutual interference between the light emitted by the two can be avoided to the greatest extent.

[0036] Furthermore, the refraction device has a first state of refracting the light emitted by the first light source 4 toward the PCB board 8 to be exposed and a second state of refracting the light emitted by the second light source 5 toward the PCB board 8 to be exposed; when the refraction device is in the first state, only the light emitted by the first light source 4 is refracted; when the refraction device is in the second state, only the light emitted by the second light source 5 is refracted. In this way, the irradiation time of a single light on the PCB board can be consistent, avoiding mutual interference between the light emitted by the two, avoiding the problem of uneven exposure caused by a longer irradiation time of a certain medium-wavelength light in a local area.

[0037] Specifically, in a feasible embodiment, refer to Figure 2 and Figure 3 The refraction device includes a refraction mirror 6 and a rotation shaft (not shown in the figure). Figure 2 In the first state, the refractor 6 is rotated to a first direction through the rotating shaft to refract the light emitted by the first light source 4 to the PCB board 8 to be exposed; Figure 3 In the second state, the refractor 6 rotates to a second direction through the rotation axis to refract the light emitted by the second light source 5 to the PCB board 8 to be exposed. Figure 1 The arrows in the middle indicate that flipping or rotation is possible.

[0038] By setting the refraction mirror 6 and the rotating shaft, the refraction device can easily realize the irradiation of the PCB board with two different wavelengths of light in the same chamber, thereby realizing double exposure.

[0039] Specifically, in a feasible embodiment, the refraction device includes a first refractor, a second refractor and a displacement assembly; in a first state, the first refractor is moved to a first position by the displacement assembly to refract the light emitted by the first light source to the PCB board to be exposed; in a second state, the second refractor is moved to a second position by the displacement assembly to refract the light emitted by the second light source to the PCB board to be exposed.

[0040] Through the arrangement of the first refractor, the second refractor and the displacement assembly, the two refractors correspond to different light sources respectively. When one of the refractors needs to be irradiated, one of the refractors is moved to the irradiation position and the other is moved away; similarly, when the other of the refractors needs to be irradiated, the other of the refractors is moved to the irradiation position and the other is moved away. Such a refraction device can also easily realize the irradiation of the PCB board with two different wavelengths of light in the same chamber in succession, thereby realizing double exposure.

[0041] Further, the first refractor and the second refractor are arranged in the same displacement assembly; or the first refractor and the second refractor are arranged in different displacement assemblies. That is, the refraction device can be two separately arranged movable refractors, or a movable refractor group.

[0042] Furthermore, the carrier includes:

[0043] an exposure platform 2, the light emitted by the refraction device being suitable for irradiating the exposure platform 2;

[0044] Loading platform 1, used for placing the PCB board to be exposed;

[0045] The unloading platform 3 is used to place the PCB boards that have completed the exposure operation.

[0046] The PCB board ink exposure device also includes:

[0047] A transport component (not shown in the figure); the transport component is suitable for transferring the PCB board to be exposed and about to undergo an exposure operation to the exposure platform, and is suitable for transferring the PCB board that has completed the exposure operation to the unloading platform.

[0048] Example 2

[0049] This embodiment provides a PCB board ink printing system, including the PCB board ink exposure device provided in the above-mentioned embodiment 1.

[0050] The PCB board ink printing system provided in this embodiment includes the PCB board ink exposure device provided in the above embodiment 1. By setting a first light source and a second light source in the same chamber, the light emitted by the first light source and the light emitted by the second light source are refracted to the carrier by using a refraction device, so that the first light source and the second light source can be set as light sources of different wavelengths, and light irradiation and exposure of different wavelength bands can be performed in the same chamber successively, and the ink undergoes two light reactions successively. The light sources of different wavelength bands have complementary effects on the internal structure of the ink, which can greatly improve the exposure effect of the ink.

[0051] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A PCB ink exposure device, characterized in that: include: Exposure chamber; A stage, arranged in the exposure chamber, suitable for placing a PCB board to be exposed; A light source system is arranged in the exposure chamber, located above the stage, and is suitable for irradiating light to the PCB board to be exposed on the stage; Wherein, the light source system comprises: a first light source, a second light source and a refraction device; The first light source and the second light source are suitable for emitting light to the refraction device respectively; The refraction device is suitable for refracting the light emitted by the first light source and the second light source to the PCB board to be exposed respectively; The first light source and the second light source are disposed in the same exposure chamber.

2. The PCB ink exposure device according to claim 1, characterized in that: There is an angle between a line connecting the first light source and the refraction device and a line connecting the second light source and the refraction device, and the angle is greater than or equal to 90° and less than or equal to 180°.

3. The PCB ink exposure device according to claim 2, characterized in that: The angle is 180°.

4. The PCB ink exposure device according to claim 1, characterized in that: The refraction device has a first state of refracting the light emitted by the first light source toward the PCB board to be exposed and a second state of refracting the light emitted by the second light source toward the PCB board to be exposed; When the refraction device is in the first state, it only refracts the light emitted by the first light source; When the refraction device is in the second state, it only refracts the light emitted by the second light source.

5. The PCB ink exposure device according to claim 4, characterized in that: The refraction device comprises a refraction mirror and a rotating shaft; In the first state, the refractor is rotated to a first direction via the rotating shaft to refract the light emitted by the first light source to the PCB board to be exposed; In the second state, the refractor is rotated to a second direction via the rotating shaft to refract the light emitted by the second light source to the PCB board to be exposed.

6. The PCB ink exposure device according to claim 4, characterized in that: The refraction device comprises a first refractor, a second refractor and a displacement assembly; In the first state, the first refractor is moved to the first position by the displacement assembly to refract the light emitted by the first light source to the PCB board to be exposed; In the second state, the second refractor is moved to a second position by the displacement assembly to refract the light emitted by the second light source to the PCB board to be exposed.

7. The PCB ink exposure device according to claim 6, characterized in that: The first refractor and the second refractor are arranged in the same displacement assembly; or; The first refractor and the second refractor are respectively arranged in different displacement components.

8. The PCB ink exposure device according to claim 1, characterized in that: The carrier comprises: an exposure platform, the light emitted by the refraction device being suitable for irradiating the exposure platform; The loading platform is used to place the PCB boards to be exposed; Unloading platform, used to place PCB boards that have completed exposure work; The PCB board ink exposure device also includes: The carrying component is suitable for transferring the PCB board to be exposed and about to be exposed to the exposure platform, and is suitable for transferring the PCB board that has completed the exposure operation to the unloading platform.

9. The PCB ink exposure device according to claim 1, characterized in that: The wavelength of light emitted by the first light source is 405nm; The wavelength of light emitted by the second light source is 425 nm.

10. A PCB board ink printing system, characterized in that: A PCB board ink exposure device comprising any one of claims 1-9.

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