Steel sheet lattice point structure, luminous lattice point hot-pressing process and equipment thereof

Abstract

The invention relates to the technical field of preparation of a light guide film in a keyboard module, solves the technical problems of low transmittance of dots on a traditional light guide film and non-uniform visual angle brightness, and particularly relates to a steel sheet dot structure, a luminous dot hot-pressing process and luminous dot hot-pressing equipment. A smooth mirror surface layer is arranged on the outer surface of the steel sheet, a lattice point group consisting of a plurality of lattice points with uniform sizes is generated on the mirror surface layer through laser treatment, the lattice points are circular concave-convex bodies, the diameter of each lattice point is 0.3 mm, and the depth of each lattice point is not less than 0.003 mm. The screen dot group is arranged on the light guide film, the PC light guide film obtained through rolling or hot pressing is smooth in periphery, glossy and high in brightness, the concave-convex state of screen dots is full and uniform, the transmittance is high through optical simulation, the visual angle brightness distribution is uniform, the effect of converting a backlight source into a surface light source can be improved, and therefore the brightness of a keyboard is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of preparing light-guiding films in keyboard modules, and in particular to a steel sheet mesh structure, a luminous mesh hot pressing process and equipment thereof. Background Art

[0002] In the backlight module of a laptop keyboard, the light-guiding film can convert the backlight source in the module into a surface light source, thereby lighting up each key on the keyboard. However, since the light-guiding film can only convert most of the light source, and the other part of the light is converted to other positions in the form of diffuse scattering, a large number of backlight sources need to be set in the laptop keyboard to meet the brightness requirements for the keys. However, this will undoubtedly increase the energy consumption of the laptop, which is not conducive to long-term office use.

[0003] Although the prior art improves the brightness of the case by printing dots on the light-guiding film, the depth of the dots is generally 0.001-0.003mm, resulting in different concave and convex states of the dots. Therefore, the dots formed on the light-guiding film have low transmittance and uneven viewing angle brightness, which seriously affects the conversion effect of the light-guiding film on the backlight source, resulting in poor effect of the surface light source and reducing the overall brightness. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a steel sheet mesh structure, a luminous mesh hot pressing process and equipment thereof, which solve the technical problems of low transmittance and uneven viewing angle brightness of mesh dots on traditional light-guiding films.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: a steel sheet dot structure, comprising a steel sheet as a laser carrier, wherein the outer surface of the steel sheet is provided with a smooth mirror layer, and the mirror layer is laser processed to generate a dot group consisting of a number of uniformly sized dots.

[0006] Furthermore, the thickness of the steel sheet is 0.1 mm.

[0007] Furthermore, there are multiple mesh point groups, and the mesh point groups are arranged corresponding to the positions of the backlight sources in the keyboard.

[0008] Furthermore, the dots are circular concave-convex bodies, and the diameter of the dots is 0.3 mm and the depth is not less than 0.003 mm.

[0009] The technical solution also provides a luminous dot hot pressing process using the above steel sheet dot structure, including the following process:

[0010] A dot group file consisting of a number of dots is designed by using luminous simulation software, wherein the dots are circular concave and convex dots with a diameter of 0.03 mm and a depth greater than 0.003 mm;

[0011] Mirror-finish the steel sheet to form a mirror-finish steel sheet with a smooth surface;

[0012] Import the dot group file into the laser machine, then place the mirror steel sheet in the laser area and perform laser lithography to form a dot steel sheet that is consistent with the designed dot group;

[0013] The dot steel sheet is mounted on a heated steel shaft of a hot pressing device, and is pressed onto the light-guiding film material through a rolling operation process to form a dot structure on the light-guiding film.

[0014] Furthermore, the printing temperature in the rolling operation process is 120°C.

[0015] The technical solution also provides a hot pressing device for realizing the above-mentioned luminous dot hot pressing process, including a shell as the main structure of the hot pressing device, the shell is provided with a feed shaft for placing the rolled PC light-guiding film material, and a correction device installed in the shell is provided on the discharge path of the feed shaft, one side of the correction device is provided with a feed wheel acting on the PC light-guiding film material, and one side thereof is also provided with a plurality of heating steel shafts, heating rubber shafts and film-closing wheels distributed in sequence at intervals, and the heating steel shaft is installed with a dot steel sheet for hot-pressing printed dot groups on the PC light-guiding film material.

[0016] Furthermore, a temperature controller for adjusting the temperature of the heated steel shaft and the heated rubber shaft is installed in the shell, a circular knife mold and a film-sealing roller for further processing the PC light-guiding film material are arranged on one side of the film-sealing wheel, and a material-receiving wheel for winding the PC light-guiding film material is also installed on the shell.

[0017] By means of the above technical solution, the present invention provides a steel sheet mesh structure, a luminous mesh hot pressing process and equipment thereof, which have at least the following beneficial effects:

[0018] 1. The present invention arranges a dot group on the light-guiding film, and the PC light-guiding film obtained by rolling or hot pressing is smooth on all sides and has high gloss and brightness. The concave and convex state of the dots is full and uniform. After optical simulation, the transmittance is high, and the viewing angle brightness distribution is uniform, which can improve the effect of converting the backlight source into a surface light source, thereby improving the brightness of the keyboard.

[0019] 2. The luminous dot hot pressing process proposed in the present invention has simple process operation and can be directly applied to the production line for mass production. At the same time, the product yield is high, which can save finished product loss and reduce the proportion of defective products.

[0020] 3. The hot pressing equipment of the present invention can apply the designed mesh dot steel sheet to the luminous mesh dot hot pressing process, so that the light-guiding film has a mesh dot structure, thereby improving the optical brightness and increasing the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 It is a schematic diagram of the steel sheet mesh structure of the present invention;

[0023] Figure 2 This is a 3D detection result diagram of the network points of the present invention;

[0024] Figure 3 This is a diagram showing the size detection results of the network dots of the present invention;

[0025] Figure 4 is a side view of the hot pressing device of the present invention;

[0026] Figure 5 It is a schematic diagram of the internal structure of the hot pressing equipment of the present invention;

[0027] Figure 6 A schematic diagram of a network point group designed by software in the present invention;

[0028] Figure 7 This is a rendering of the optical simulation of the designed dot group in the present invention.

[0029] In the figure:

[0030] 01, steel sheet; 02, mirror layer; 03, dot group;

[0031] 1. Shell; 2. Unloading shaft; 3. Correction device; 4. Unloading wheel; 5. Heating steel shaft; 6. Temperature controller; 7. Heating rubber shaft; 8. Film closing wheel; 9. Circular knife mold; 10. Film closing roller; 11. Receiving wheel. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0033] Embodiment 1

[0034] In the prior art, since the surface of ordinary steel sheets is uneven and not smooth, and the surface has not been specially treated, the surface gloss is poor. At the same time, the surface of the steel sheet has texture marks after cutting, which causes the laser-projected dots to be uneven when tested by 3D detection equipment. In addition, a lot of waste slag is generated on the steel sheet during laser processing. The dot depth is only 0.001-0.003mm through 3D detection. The optical data tested is unstable. When the optical test instrument is used to test the steel sheet dot structure, the dot depth does not meet the requirement of 0.003mm or above. For the defects of the prior art, please refer to Figure 1-Figure 3 This embodiment proposes a steel sheet dot structure, including a steel sheet 01 as a laser carrier, the thickness of the steel sheet 01 is 0.1 mm, the outer surface of the steel sheet 01 is provided with a smooth mirror layer 02, and a dot group 03 composed of a plurality of uniformly sized dots is generated on the mirror layer 02 by laser processing, such as Figure 1 As shown. There are multiple dot groups 03, and the dot groups 03 are set corresponding to the positions of the backlight sources in the keyboard. The dots are circular concave-convex bodies, and the diameter of the dots is 0.3 mm, and the depth is greater than 0.003 mm.

[0035] This embodiment uses a mirror steel sheet, which is a steel sheet that has been specially processed to make its surface as smooth as a mirror. Figure 2 and Figure 3 As shown, the steel sheet 01 with the mirror layer 02 produces less waste residue during laser irradiation, and the PC light-guiding film produced by rolling or hot pressing is smooth and shiny around, with high brightness, thus improving the brightness. There are no blurred patterns around, the rolled dots are uniform in size, the holes are relatively round, and there is no phenomenon of non-circular holes. The dot depth detected by 3D has increased from the range of 0.001-0.003mm to the range of 0.003-0.006mm.

[0036] Embodiment 2

[0037] Based on Example 1, please refer to Figure 6 and Figure 7 This embodiment proposes a luminous dot hot pressing process, including the following process:

[0038] A dot group file consisting of several dots is designed through luminous simulation software, where the dots are circular concave and convex dots with a diameter of 0.03mm and a depth greater than 0.003mm. The steel sheet is mirror-finished to form a mirror steel sheet with a smooth surface. The dot group file is imported into the laser machine, and then the mirror steel sheet is placed in the laser area and laser-formed to form a dot steel sheet consistent with the designed dot group. Among them, a high-precision laser machine is used to laser-mark the 0.1mm thick mirror steel sheet according to the designed dot group file, and the dots are marked to be consistent with the dots in the designed dot group file, and finally the luminous effect is achieved through rolling or hot pressing.

[0039] The dot steel sheet is mounted on the heated steel shaft of the hot pressing equipment, and is pressed on the light-guiding film material through a rolling operation process, so that the light-guiding film has a dot structure. The pressing temperature of the rolling operation process is 120°C. This embodiment uses rolling or hot pressing technology to control the depth of the printed dot pattern within 0.003mm, and then uses a high-precision 3D microscope test instrument and a brightness tester for testing. The schematic diagram of the test results is shown in the figure. Figure 6 and Figure 7 As shown, it can be seen that the PC light-guiding film obtained by rolling or hot pressing has a clear dot structure, and its surface is smooth and glossy, with high brightness, and there is no fuzzy pattern around it. The rolled dots are uniform in size, and the holes are relatively round, without the phenomenon of non-circular holes. Figure 7 As shown in the optical simulation effect diagram, the PC light-guiding film has an excellent luminous effect and can convert the backlight source into a surface light source through the mesh structure, thereby improving the brightness of the backlit keyboard.

[0040] In this embodiment, the dots are projected onto a mirror steel sheet by laser, and the dot structure on the steel sheet is printed on a PC light-guiding film material by rolling and hot pressing at a temperature of 120°C to form a luminous dot. The PC light-guiding film with the dot structure is then assembled into a keyboard backlight module, and the dot light source on the PC light-guiding film is converted into a surface light source through the backlight source, which can be widely used in the field of optical technology of notebook computer keyboards.

[0041] Embodiment 3

[0042] Based on the first and second embodiments, please refer to Figure 4 and Figure 5This embodiment proposes a device for a luminous dot hot pressing process, including a shell 1 as the main structure of the hot pressing device, a feed shaft 2 for placing a rolled PC light-guiding film material is arranged on the shell 1, a correction device 3 installed in the shell 1 is arranged on the discharge path of the feed shaft 2, a feed wheel 4 acting on the PC light-guiding film material is arranged on one side of the correction device 3, and a plurality of heating steel shafts 5, heating glue shafts 7 and film bonding wheels 8 are arranged on one side thereof, and a dot steel sheet for hot pressing and printing a dot group on the PC light-guiding film material is installed on the heating steel shaft 5.

[0043] A temperature controller 6 for adjusting the temperature of the heated steel shaft 5 and the heated rubber shaft 7 is installed in the shell 1. A circular knife mold 9 and a film-sealing roller 10 for further processing the PC light-guiding film material are arranged on one side of the film-sealing wheel 8. A material-receiving wheel 11 for reeling up the PC light-guiding film material is also installed on the shell 1.

[0044] The hot pressing equipment provided in this embodiment can be compatible with the steel sheet mesh dot structure and the luminous mesh dot hot pressing process proposed in the above embodiments, and can apply the designed mesh dot steel sheet to the luminous mesh dot hot pressing process, so that the light-guiding film has a mesh dot structure, thereby improving the optical brightness and increasing the product yield, thereby saving finished product loss and reducing the proportion of defective products.

[0045] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the above embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0046] The above implementation methods have been described in detail. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A steel sheet mesh structure, comprising a steel sheet (01) as a laser carrier, characterized in that: The outer surface of the steel sheet (01) is provided with a smooth mirror layer (02), and a dot group (03) consisting of a plurality of dots of uniform size is generated on the mirror layer (02) through laser processing.

2. The steel sheet mesh structure according to claim 1, characterized in that: The thickness of the steel sheet (01) is 0.1 mm.

3. The steel sheet mesh structure according to claim 1, characterized in that: The number of the grid point groups (03) is plural, and the grid point groups (03) are arranged corresponding to the positions of the backlight sources in the keyboard.

4. The steel sheet mesh structure according to claim 1, characterized in that: The dots are circular concave-convex bodies, and the diameter of the dots is 0.3 mm and the depth is not less than 0.003 mm.

5. A luminous dot hot pressing process using the steel dot structure according to any one of claims 1 to 4, characterized in that: The process includes: A dot group file consisting of a number of dots is designed by using luminous simulation software, wherein the dots are circular concave and convex dots with a diameter of 0.03 mm and a depth greater than 0.003 mm; Mirror-finish the steel sheet to form a mirror-finish steel sheet with a smooth surface; Import the dot group file into the laser machine, then place the mirror steel sheet in the laser area and perform laser lithography to form a dot steel sheet that is consistent with the designed dot group; The dot steel sheet is mounted on a heated steel shaft of a hot pressing device, and is pressed onto the light-guiding film material through a rolling operation process to form a dot structure on the light-guiding film.

6. The luminous dot hot pressing process according to claim 5, characterized in that: The printing temperature in the rolling operation step is 120°C.

7. A hot pressing device for implementing the luminous dot hot pressing process according to any one of claims 5 to 6, comprising a housing (1) as the main structure of the hot pressing device, characterized in that: The housing (1) is provided with a feeding shaft (2) for placing a rolled PC light-guiding film material, and a correction device (3) installed in the housing (1) is provided on the discharge path of the feeding shaft (2). A feeding wheel (4) acting on the PC light-guiding film material is provided on one side of the correction device (3), and a plurality of heating steel shafts (5), heating glue shafts (7) and film-closing wheels (8) are also provided on one side thereof and are spaced apart in sequence. A dot steel sheet for hot-pressing a dot group on the PC light-guiding film material is installed on the heating steel shaft (5).

8. The hot pressing device according to claim 7, characterized in that: A temperature controller (6) for adjusting the temperature of the heated steel shaft (5) and the heated rubber shaft (7) is installed in the shell (1), and a circular knife mold (9) and a film-sealing roller (10) for further processing the PC light-guiding film material are arranged on one side of the film-sealing wheel (8). A material-receiving wheel (11) for reeling up the PC light-guiding film material is also installed on the shell (1).

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