Welding hole for fixedly inserting PIN type LCD (Liquid Crystal Display) on PCB (Printed Circuit Board)
By setting an inverted right angle on the exposed copper metal of the soldering round holes and increasing the adjacent spacing of the pad holes, the problem of welding tin connection with the small Pitch of the LCD PIN pin is solved, ensuring the safe welding and display effect of the PIN LCD is inserted.
Patent Information
- Application Number
- CN202420790284.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-01-22
- Filing Date
- 2024-04-16
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-04-16
AI Technical Summary
When the number of PIN pins of the LCD is large, especially the 1~12 PIN pins need to be connected to the driver IC. The Pitch spacing of adjacent PINs is too large, resulting in too long traces between the driver IC and the PIN pins, which is too large, affecting the display effect; while reducing the PITCH spacing of the PIN is likely to cause the phenomenon of tin connection between the two pins.
Set an inverted right angle on the left and right ends of the exposed copper metal of the soldering round hole to increase the adjacent spacing of the pad holes to avoid soldering tin connections in the PITCH of the LCD PIN.
By increasing the adjacent spacing of the soldering round holes, the welding tin phenomenon of PIN with a small PITCH is avoided, so that the PIN LCD can be safely soldered and fixed to the PCB, ensuring optimization of the display effect.
Smart Images
Figure CN222967157U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of display, in particular to a welding hole for fixing a pin - inserted LCD on a PCB. Background Art
[0002] The LCM module mainly includes a pin - inserted LCD and a PCB. The pin - inserted LCD needs to be welded and fixed on the PCB. As Figure 1 shown, when the number of pin - feet of the LCD is large, for example, when there are 24 pin - feet, especially for pin - feet 1 - 12, they need to be connected to the driving IC through ITO. If the Pitch distance between adjacent PINs is too large, the wiring between the driving IC and the PIN - feet will be too long, with a large impedance, affecting the display effect. If the impedance between the LCD and the driving IC is reduced by narrowing the PIN distance of the LCD, but when narrowing the PITCH distance of the PINs of the LCD and welding it on the Figure 2 PCB as shown, it is easy to cause the phenomenon of solder bridging between two pins.
[0003] As Figure 3 shown, in the existing technology, the width of the LCD PIN is 0.4mm, the PITCH distance of the PIN is 1.5mm, the inner diameter of the designed welding hole on the corresponding PCB is 0.6mm, the outer diameter is 1.0mm, and the area between the inner diameter and the outer diameter is exposed copper metal for soldering. The peripheral distance between two adjacent vias on the PCB is 0.5mm. When this distance is equal to or less than this value, it is very easy for two pins to have solder bridging during the assembly and welding of the LCD. Summary of the Utility Model
[0004] Based on this, in view of the above - mentioned technical problems, it is necessary to provide a welding hole for fixing a pin - inserted LCD on a PCB. By setting chamfered corners at the left and right ends of the exposed copper metal of the welding round hole, the adjacent distance between the two solder pads is increased, avoiding the phenomenon of solder bridging when the PITCH of the PINs of the LCD is small, so that the pin - inserted LCD can be safely welded and fixed on the PCB.
[0005] To solve the above - mentioned technical problems, the utility model adopts the following technical solutions:
[0006] A welding hole for fixing a pin - inserted LCD on a PCB.
[0007] The welding hole for fixing a pin - inserted LCD on the PCB specifically includes:
[0008] A PCB, on which there are several welding round holes. The inner diameter of the welding round hole is 0.6mm, the outer diameter is 1.0mm, and the area between the inner diameter and the outer diameter of the welding round hole is exposed copper metal. Chamfered corners are provided on the exposed copper metal on both the left and right sides of the welding round hole.
[0009] As a preferred embodiment of the welding holes for fixing the pin - type LCD on the PCB provided by the present utility model, the distance from the chamfer to the center of the welding round hole is 0.3 mm to 0.5 mm.
[0010] As a preferred embodiment of the welding holes for fixing the pin - type LCD on the PCB provided by the present utility model, the chamfers on both the left and right sides of the welding round hole are in a vertically parallel state.
[0011] As a preferred embodiment of the welding holes for fixing the pin - type LCD on the PCB provided by the present utility model, the distance between adjacent welding round holes is 0.7 mm.
[0012] As a preferred embodiment of the welding holes for fixing the pin - type LCD on the PCB provided by the present utility model, all the welding round holes are arranged at the upper and lower ends of the top surface of the PCB.
[0013] As a preferred embodiment of the welding holes for fixing the pin - type LCD on the PCB provided by the present utility model, the welding round holes at the upper and lower ends of the top surface of the PCB are arranged in a straight line in an arithmetic progression.
[0014] As a preferred embodiment of the welding holes for fixing the pin - type LCD on the PCB provided by the present utility model, the welding holes for fixing the pin - type LCD on the PCB further include an LCD screen. A number of PIN feet are arranged at the upper and lower ends of the bottom surface of the LCD screen, and all the PIN feet correspond to all the welding round holes one by one.
[0015] As a preferred embodiment of the welding holes for fixing the pin - type LCD on the PCB provided by the present utility model, the length dimension of the PIN feet is 1.5 mm to 2.0 mm.
[0016] As a preferred embodiment of the welding holes for fixing the pin - type LCD on the PCB provided by the present utility model, the distance dimension between two adjacent PIN feet is 6 mm to 7 mm.
[0017] As a preferred embodiment of the welding holes for fixing the pin - type LCD on the PCB provided by the present utility model, an IC bonding positioning is further arranged on the top surface of the LCD screen.
[0018] Compared with the prior art, the present utility model has the following beneficial effects:
[0019] The welding holes for fixing pin - inserted LCDs on the PCB provided by the present utility model are provided with chamfers at the left and right ends on the exposed copper metal of the welding round holes, increasing the adjacent spacing of the solder pads. When the pitch of the PINs of the LCD is small, it can avoid the phenomenon of solder bridging, enabling the pin - inserted LCD to be safely welded and fixed on the PCB. Brief Description of the Drawings
[0020] In order to more clearly illustrate the solutions in the present utility model, the following will give a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the following - described drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0021] Figure 1 is a schematic structural diagram of the prior art;
[0022] Figure 2 is a schematic structural diagram of the prior art;
[0023] Figure 3 is a schematic structural diagram of the prior art;
[0024] Figure 4 is a schematic structural diagram of the welding holes for fixing pin - inserted LCDs on the PCB provided by the present utility model;
[0025] Figure 5 is a schematic structural diagram of the PCB in the present utility model;
[0026] Figure 6 is a schematic structural diagram of the welding round holes in the present utility model.
[0027] The markings in the figures are described as follows:
[0028] PCB 1; welding round hole 2; exposed copper metal 3; chamfer 4; LCD screen 5; PIN foot 6; IC bonding position 7. Detailed Embodiment
[0029] In order to enable those skilled in the art to better understand the solutions of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0030] As in the background art, if the pitch between adjacent PINs is too large, it will cause the wiring between the driving IC and the PINs to be too long, with a large impedance, affecting the display effect. If the impedance between the LCD and the driving IC is reduced by narrowing the PIN pitch of the LCD, but narrowing the PIN pitch of the LCD will easily cause the phenomenon of solder bridging between two pins when it is soldered on the Figure 2 PCB shown below.
[0031] To solve this technical problem, the present utility model provides a welding hole for fixing and inserting PIN-type LCDs on a PCB.
[0032] Specifically, please refer to Figures 1 - 3 , the welding hole for fixing and inserting PIN-type LCDs on a PCB specifically includes:
[0033] A PCB, the PCB is provided with a plurality of welding round holes, the inner diameter of the welding round hole is 0.6 mm, the outer diameter is 1.0 mm, the area between the inner diameter and the outer diameter of the welding round hole is exposed copper metal, and the exposed copper metal on both sides of the welding round hole is provided with chamfered corners.
[0034] The welding hole for fixing and inserting PIN-type LCDs on a PCB provided by the present utility model, by providing chamfered corners at the left and right ends of the exposed copper metal on the welding round hole, increases the adjacent spacing of the two solder pad holes, avoids the phenomenon of solder bridging when the pitch of the PINs of the LCD is small, and enables the inserted PIN LCD to be safely welded and fixed on the PCB1.
[0035] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings.
[0036] It should be noted that, without conflict, the embodiments and the features and technical solutions in the embodiments of the present utility model can be combined with each other.
[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Embodiment 1
[0038] Please refer to Figures 1 - 3 , a welding hole for fixing and inserting PIN-type LCDs on a PCB, which includes a PCB1, the PCB1 is provided with a plurality of welding round holes 2, the inner diameter of the welding round hole 2 is 0.6 mm, the outer diameter is 1.0 mm, the area between the inner diameter and the outer diameter of the welding round hole 2 is exposed copper metal 3, and the exposed copper metal 3 on both sides of the welding round hole 2 is provided with chamfered corners 4.
[0039] Through the above structural design, the round holes of the pads are widely used in single-sided and double-sided printed circuit boards for regular component arrangement. If the density of the board permits, the pads can be made larger so that they will not fall off during soldering. The round holes of the pads are increased with an inner circle having an inner diameter of 0.8 mm, and a vertical outer tangent line is added on both its left and right sides. The outer tangent line is connected to a circle with an outer diameter of 1.0 mm, and then the left and right sides of the circle with an outer diameter of 1.0 mm that are connected to the vertical line are removed, obtaining the new outer shape design of the welding round hole 2 in the figure. By setting chamfered corners 4 at both left and right ends on the exposed copper metal 3 of the welding round hole 2, the adjacent spacing of the pads is increased. When the pitch of the PINs of the LCD is small, the phenomenon of solder bridging is avoided, enabling the PIN-inserted LCD to be safely soldered and fixed on the PCB1.
[0040] Specifically, the distance from the chamfered corner 4 to the center of the welding round hole 2 is 0.3 mm to 0.5 mm.
[0041] Through the above structural design, in this embodiment, the distance from the chamfered corner 4 to the center of the welding round hole 2 is 0.4 mm. In different requirements, it can also be 0.3 mm or 0.5 mm.
[0042] Specifically, the chamfered corners 4 on both the left and right sides of the welding round hole 2 are in a vertically parallel state.
[0043] Through the above structural design, a vertical outer tangent line is added on both its left and right sides. The outer tangent line is connected to a circle with an outer diameter of 1.0 mm, and then the left and right sides of the circle with an outer diameter of 1.0 mm that are connected to the vertical line are removed, obtaining the new outer shape design of the welding round hole 2 in the figure.
[0044] Specifically, the spacing between adjacent welding round holes 2 is 0.7 mm.
[0045] Through the above structural design, by setting chamfered corners 4 at both left and right ends on the exposed copper metal 3 of the welding round hole 2, the adjacent spacing of the pads is increased. When the pitch of the PINs of the LCD is small, the phenomenon of solder bridging is avoided, enabling the PIN-inserted LCD to be safely soldered and fixed on the PCB1.
[0046] Specifically, all the welding round holes 2 are arranged at the upper and lower ends of the top surface of the PCB1.
[0047] Specifically, the welding round holes 2 at the upper and lower ends of the top surface of the PCB1 are arranged in an arithmetic sequence in a line.
[0048] Through the above structural design, by setting chamfered corners 4 at both left and right ends on the exposed copper metal 3 of the welding round hole 2, the adjacent spacing of the pads is increased. When the pitch of the PINs of the LCD is small, the phenomenon of solder bridging is avoided, enabling the PIN-inserted LCD to be safely soldered and fixed on the PCB1. Example 2
[0049] The welding holes for fixing the pin - inserted LCD on the PCB provided in Example 1 are further optimized. Specifically, as Figure 4 shown, the welding holes for fixing the pin - inserted LCD on the PCB further include an LCD screen 5. A plurality of PIN feet 6 are arranged at both the upper and lower ends of the bottom surface of the LCD screen 5, and all the PIN feet 6 correspond to all the welding round holes 2 one by one.
[0050] Through the above - mentioned structural design, the pin - inserted LCD is fixedly welded on the welding round holes 2 of the PCB1 through the PIN feet 6. Example 3
[0051] The welding holes for fixing the pin - inserted LCD on the PCB provided in Example 1 or 2 are further optimized. As Figures 1 - 3 shown, the length dimension of the PIN feet 6 is 1.5 mm to 2.0 mm.
[0052] Through the above - mentioned structural design, in this embodiment, the length dimension of the PIN feet 6 is 1.78 mm. In different requirements, it can also be 1.5 mm or 2 mm.
[0053] Specifically, the distance dimension between two adjacent PIN feet 6 is 6 mm to 7 mm.
[0054] Through the above - mentioned structural design, in this embodiment, the distance dimension of the PIN feet 6 is 6 mm. In different requirements, it can also be 6.5 mm or 7 mm.
[0055] The beneficial effects of the welding holes for fixing the pin - inserted LCD on the PCB provided by the present utility model are as follows:
[0056] By providing chamfered edges 4 at the left and right ends of the exposed copper metal 3 of the welding round holes 2, the adjacent spacing of the solder pads is increased. When the PITCH of the PINs of the LCD is small, the phenomenon of soldering short - circuit is avoided, enabling the pin - inserted LCD to be safely welded and fixed on the PCB1.
[0057] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above - mentioned terms in the present utility model can be understood according to specific circumstances.
[0058] Obviously, the embodiments described above are only a part of the embodiments of the present utility model, rather than all of them. The preferred embodiments of the present utility model are shown in the drawings, but they do not limit the patent scope of the present utility model. The present utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structure made by using the content of the specification and drawings of the present utility model, directly or indirectly applied in other related technical fields, is similarly within the scope of the patent protection of the present utility model.
Claims
1. A welding hole for fixing a PIN-type LCD on a PCB, characterized in that: The invention comprises a PCB (1), wherein the PCB (1) is provided with a plurality of welding circular holes (2), wherein the inner diameter of the welding circular hole (2) is 0.6 mm and the outer diameter thereof is 1.0 mm, copper metal (3) is exposed between the inner diameter and the outer diameter of the welding circular hole (2), and the copper metal (3) on the left and right sides of the welding circular hole (2) is provided with chamfered right angles (4).
2. The welding hole for fixing a PIN-type LCD on a PCB according to claim 1, characterized in that: The distance between the chamfered right angle (4) and the center of the welding circular hole (2) is 0.3 mm to 0.5 mm.
3. The welding hole for fixing a PIN-type LCD on a PCB according to claim 2, characterized in that: The chamfered right angles (4) on the left and right sides of the welding circular hole (2) are both in a vertically parallel state.
4. The welding hole for fixing a PIN-type LCD on a PCB according to claim 1, characterized in that: The spacing between adjacent welding circular holes (2) is 0.7 mm.
5. The welding hole for fixing a PIN-type LCD on a PCB according to claim 4, characterized in that: All the circular welding holes (2) are arranged at the upper and lower ends of the top surface of the PCB (1).
6. The welding hole for fixing a PIN-type LCD on a PCB according to claim 5, characterized in that: The circular welding holes (2) at the upper and lower ends of the top surface of the PCB (1) are arranged in an arithmetic progression.
7. The welding hole for fixing a PIN-type LCD on a PCB according to claim 1, characterized in that: The welding holes for fixing the PIN-type LCD on the PCB also include an LCD screen (5), and a plurality of PIN pins (6) are provided at both upper and lower ends of the bottom surface of the LCD screen (5), and all the PIN pins (6) correspond one-to-one to all the welding circular holes (2).
8. The welding hole for fixing a PIN-type LCD on a PCB according to claim 7, characterized in that: The length of the PIN pin (6) is 1.5 mm to 2.0 mm.
9. The welding hole for fixing a PIN-type LCD on a PCB according to claim 8, characterized in that: The distance between two adjacent PIN pins (6) is 6 mm to 7 mm.
10. The welding hole for fixing a PIN-type LCD on a PCB according to claim 9, characterized in that: The top surface of the LCD screen (5) is also provided with an IC binding position (7).