The present disclosure relates to a control circuit board.
In a control circuit board on which, for example, an integrated circuit is implemented, a pad group for testing is sometimes provided additionally on the board such that an operation test of the integrated circuit can be performed simply using an externally provided analysis apparatus.
However, according to the control circuit board 1 depicted in
According to an embodiment of the present disclosure, there is provided a control circuit board including a board including a first surface and a second surface, wherein the first surface and the second surface are on opposite sides of the board, an integrated circuit disposed on the first surface of the board, and a pad group disposed on the second surface of the board and electrically connected to the integrated circuit through a through-hole formed in the board.
Preferably, a protective film having insulation removably covers the pad group.
Preferably, the pad group includes a plurality of pads that extend in a first direction and are placed at equal distances along a second direction that is perpendicular to the first direction.
The integrated circuit may be a touch integrated circuit (IC) that has a communication interface for communicating with an external apparatus and that, in operation, may perform driving control of a touch sensor, and the pad group may be electrically connected to the communication interface through the through-hole formed in the board and enable the external apparatus to perform to perform an operation test of the touch IC through the communication interface.
With the present disclosure, an external attachment work of an analysis apparatus through a pad group to the control circuit board can be performed easily.
In the following, an embodiment of the present disclosure is described with reference to the accompanying drawings. In order to facilitate understandings of the description, like components in the drawings are denoted by like reference signs as far as possible and overlapping description of them is omitted herein.
The control circuit board 10 includes a board 12 of a substantially rectangular shape elongated in one direction. On one of two main surfaces of the board 12, an integrated circuit 16, electronic parts 18 and 20, and connectors 22 and 24 are provided. The main surface mentioned of the board 12 is hereinafter referred to as a “front surface 14.” The integrated circuit 16 is a touch IC that has a communication interface for communicating with an external apparatus and performs driving control of the touch sensor and synchronous control of the touch pen through execution of firmware. The connector 22 is configured for connection to an X-axis cable of the touch sensor. The connector 24 is configured for connection to a Y-axis cable of the touch sensor.
Through-holes 26 and 28 are formed at corner portions of the board 12. An inner wall of the board 12 surrounding each of the through-holes 26 and 28 is plated with copper. The integrated circuit 16 is connected to the through-holes 26 and 28 through printed wires not depicted. The through-holes 26 and 28 allow connection of the printed wires from the other main surface of the board 12 to the integrated circuit 16. The other main surface mentioned of the board 12 is hereinafter referred to as a “rear surface 30.”
The pad group 34 is used in order to perform an operation test of the integrated circuit 16 through the communication interface of the integrated circuit 16. The pad group 34 is placed densely at one place of the rear surface 30. The plurality of pads 32 configuring the pad group 34 extend in a short side direction of the board 12 and are placed at equal distances along a long side direction of the board 12.
Each of the lead lines configuring the lead line group 36 is connected at the other end thereof to the through-hole 26 described above. Consequently, the pad group 34 is electrically connected to the integrated circuit 16 through the through-hole 26. The pad group 34 and the lead line group 36 are covered from above with a protective film 38 having insulation. The protective film 38 can be removed by a physical process or a chemical process.
The control circuit board 10 according to the present embodiment is configured in such a manner as described above. Now, a working effect by the control circuit board 10 is described with reference to
A worker would first remove part of the protective film 38 provided on the rear surface 30 of the control circuit board 10 to expose the pad group 34 to the outside. Then, the worker would perform positioning of the flat cable 40 and then press the connection terminal group of the flat cable 40 against the pad group 34. Consequently, the connection terminal group of the flat cable 40 is fixed simultaneously and collectively to all of the pads 32 configuring the pad group 34, and therefore, they can be connected simply to the external analysis apparatus. Then, if the worker leads out the flat cable 40 to the outside of the electronic equipment while the control circuit board 10 is incorporated into the electronic equipment, then the worker can perform an operation test of the integrated circuit 16 in a state close to an actual operation environment of the electronic equipment.
It is to be noted that the specifications of the pad group 34, particularly the number, width, length, pitch, and so forth of the pads 32, may be common or different according to the model of the touch sensor, the touch pen, or the electronic equipment. Especially, if the specifications of the pad group 34 are made common, then the convenience upon testing is improved.
As described above, the control circuit board 10 includes a board 12, an integrated circuit 16 provided on a main surface 14 of the board 12, and a pad group 34 placed densely at one place of the rear surface 30 of the board 12 and electrically connected to the integrated circuit 16 through a through-hole 26 or 28 formed in the board 12.
Since the plurality of the pads 32 are placed densely at one place by using the rear surface 30 on which the integration density is relatively low in comparison with the front surface 14 on which the integrated circuit 16 is provided, it becomes easy to fix two or more pads 32 simultaneously and collectively to connection terminals for external attachment, in the example of
Further, the pad group 34 may be covered in a removable state with a protective film 38 having insulation. The protective film 38 suppresses malfunction and so forth of the integrated circuit 16, which may possibly be caused by contact of the pad group 34 with a conductive part of the electronic equipment in which the control circuit board 10 is incorporated. Further, by removing the protective film 38 as occasion demands, the pad group 34 can be used timely.
Further, a plurality of pads 32 configuring the pad group 34 may extend in one direction (one side direction of the board 12) and be placed at equal distances along a direction perpendicular to the one direction (along the other side direction of the board 12). By the configuration, the control circuit board 10 can be connected simply to an external analysis apparatus through a flat cable 40 that has a connection terminal group in which connection terminals are placed at a pitch same as that of the pads 32.
The integrated circuit 16 may be a touch IC that has a communication interface for communicating with an external apparatus and performs driving control of a touch sensor, and the pad group 34 may be used to perform an operation test of the touch IC through the communication interface. This configuration makes it possible to easily perform an operation test of the touch sensor.
It is to be noted that the embodiment of the present disclosure is not limited to the foregoing embodiment, and that various changes can be made without departing from the spirit of the present disclosure.
Number | Date | Country | Kind |
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202120101926.5 | Jan 2021 | CN | national |