TW201308897A - Control circuit of electronic apparatus and display apparatus - Google Patents

Abstract

A control circuit of an electronic apparatus is disclosed. The control circuit includes a circuit base board, a plurality of pads, a processor and a wire conduction switch. The pads are disposed in a footprint region on the circuit base board. The pads coupled to a connector which receives a plurality of control signals. Wherein, the pin number of the connector is not larger than the number of the pads. The processor disposed on the circuit base board and connected to a plurality of signal transmission lines. The wire conduction switch disposed on between the footprint region and the processor. The wire conduction switch selects a connection between the signal transmission lines and the pads according to a style of the connector.

Description

Control circuit of electronic device and display device

The present invention relates to a control circuit for an electronic device, and more particularly to a control circuit for a display device that can be applied to different interfaces.

In the conventional technical field, the basic architecture of the control circuits employed by the electronic devices of a plurality of different interfaces is similar and there are only slight differences. In order to enable these different interface electronic devices to operate effectively, in the conventional technical field, the simplest is to design a set of control circuits for each interface electronic device. However, this method requires a lot of preparation to respond to electronic devices of different interfaces, which is difficult to use and manage.

Taking the electronic device of the display device as an example, in the current technical field, the control interface of a common liquid crystal display device includes a red, green and blue (RGB) control interface, and a mobile phone partnership initiative (Mobile Phone Partnership Initiative). , MPPI) transmission interface, mobile display digital interface (MDDI) and mobile industry processor interface (MIPI). Taking the mobile display digital interface as an example, the mobile display digital interface is a high-speed digital data transmission interface, which is usually used on a folding mobile phone for data transmission between two subjects. The action display digital interface transmission rate of up to 3.2 Gbits per second, and effectively reduce the number of signal lines connected between the controller and display module of the device.

Please note that the above various transmission interfaces are different in the number of transmission signals required. Therefore, the number of pins of the connector in which the above-mentioned transmission interface is connected to the control circuit of the display device to which it belongs is not the same. Therefore, in the prior art, only a variety of display devices using different transmission interfaces can be separately designed with one control circuit, resulting in complexity in preparation and assembly.

The invention provides a control circuit for an electronic device, which can be applied to electronic devices of various different interfaces.

The invention provides a display device for controlling display modules of a plurality of different interfaces by connecting connectors of different positions.

The invention provides a control circuit for an electronic device, comprising a circuit substrate, a plurality of pads, a processor and a wire switcher. The pad is disposed in a footprint area on the circuit substrate. The pad is coupled to the connector, wherein the connector transmits a plurality of control signals, and the number of pins of the connector is not greater than the number of pads. The processor is disposed on the circuit substrate and connects the plurality of signal transmission and reception wires. The wire switcher is disposed between the footprint area and the processor, coupled to the pad and the processor. The wire switcher selects the way the signal transmission wire is connected to the pad according to the form of the connector.

In an embodiment of the invention, the processor receives at least one selection signal, and the processor determines the form of the connector according to the selection signal.

In an embodiment of the invention, there is further included a selection signal generator coupled to the processor. The selection signal generator includes at least one resistor. The resistor is coupled to the supply voltage or the ground voltage and thereby generates a bit of the selection signal.

In an embodiment of the invention, the wire switcher includes a plurality of selector switches. The selection switch is coupled between the pad and the signal transmission wire, and each selection switch determines a connection relationship between each pad and the signal transmission wires according to the selection signal.

In an embodiment of the invention, the wire switcher includes a plurality of jumpers. The jumper is coupled between the pad and the signal transmission wire, and each jumper determines a connection relationship between each pad and the signal transmission wires according to the selection signal.

The present invention further provides a display device. The display device has a display module and a connector, and the display module transmits a plurality of control signals through the connector. The display device includes a circuit substrate, a plurality of pads, a processor, and a wire switcher. The solder pad is disposed in a footprint area on the circuit substrate and is coupled to the connector. The connector transmits the control signal, and the number of pins of the connector is not greater than the number of pads. The processor is disposed on the circuit substrate and connects the plurality of signal transmission and reception wires. The wire switcher is disposed between the footprint area and the processor, coupled to the pad and the processor. The wire switcher selects the way the signal transmission wire is connected to the pad according to the form of the connector.

Based on the above, the present invention provides a footprint area on the circuit substrate, and a plurality of pads are disposed to be connected to the connector, and the wire switcher switches the signal transmission wire and the pad according to the type of the connected connector. The connection method allows the transmission of control signals between the processor and the connector to be adjusted according to the type of the connector. In this way, the fixed type control circuit can be applied to different types (transmission interface) electronic devices, and different control circuits are not required for different types of electronic devices, thereby effectively reducing the cost of the product.

The above described features and advantages of the present invention will be more apparent from the following description.

Please refer to FIG. 1 . FIG. 1 is a schematic diagram of a control circuit 100 of an electronic device according to an embodiment of the present invention. The control circuit 100 includes a circuit substrate 110, pads 121 to 12N, a processor 140, and a wire switcher 130. The pads 121 to 12N are disposed in the footprint region 120 on the circuit substrate 110. The pads 121~12N form a leadframe structure and are provided for soldering with a connector (not shown) for connecting the electronic device, wherein the number of pins of the connector is not greater than the pads 121-12N Quantity.

The processor 140 is disposed on the circuit board 110, and connects a plurality of signal transmission lines CS1 to CSM to transmit control signals. The processor 140 transmits the wires CS1 to CSM through the signals and transmits the connections on the pads 121 to 12N. The device and the electronic device perform transmission of a plurality of control signals. The wire switch 130 is disposed between the footprint area 120 on the circuit substrate 110 and the processor 140. The wire switcher 130 is coupled to the pads 121-12N and coupled to the transmission wires CS1~CSM on the processor 140. The wire switcher 130 selects a connection mode between the signal transmission wires CS1 to CSM and the pads 121 to 12N according to the form of the connector coupled to the pads 121 to 12N.

Specifically, each of the pads 121 to 12N is electrically connected to at least one of the signal transmission wires TS1 to TSP. The pads 121 to 12N are connected to the wire switch 130 through the signal transmission wires TS1 to TSP. The wire switcher 130 selects the connection relationship between the signal transmission wires TS1~TSP and the signal transmission wires CS1~CSM according to the form of the connector coupled to the pads 121~12N. That is, the wire switcher 130 changes the control signal transmitted (received) by the processor 140 to the position of (from) the pads 121 to 12N depending on the form of the connector to be connected.

Incidentally, the number of the signal transmission wires CS1 to CSM and the signal transmission wires TS1 to TSP in this embodiment are not the same, and the number of the signal transmission wires TS1 to TSP may be greater than, less than or equal to the signal transmission. The number of wires CS1~CSM is collected. That is to say, it is not necessary to connect the signal transmission wires CS1 to CSM and the signal transmission wires TS1 to TSP one to one. The wire switcher 130 can connect a plurality of the signal transmission wires TS1~TSP to one of the signal transmission wires CS1~CSM. In contrast, the wire switcher 130 can also transmit the signals to the wires CS1~CSM. A plurality of pieces are connected in common to one of the signal transmission wires TS1 to TSP. In addition, the wire switcher 130 may also cause at least one of the signal transmission wires CS1 to CSM and/or the signal transmission wires TS1 to TSP to be in a floating state.

2A, 2B, and 2C, FIGS. 2A, 2B, and 2C are schematic views respectively showing the connection manner of the pads 121 to 12N and the connector according to the embodiment of the present invention. The number of pins of the connector CN1 shown in FIG. 2A is smaller than the number of pads 121 to 12N, and the connector CN1 can be on the side of the footprint region 120 where the pads 121 to 12N are located (such as the left side of the figure). The welding is performed by aligning the pads 121 to 123. Of course, the connector CN1 can also be soldered to a plurality of the pads 121 to 12N by the other side of the footprint region 120 where the pads 121 to 12N are located (as shown on the right side).

In addition, the number of pins of the connector CN2 shown in FIG. 2B is smaller than the number of pads 121 to 12N, but the number of pins of the connector CN2 is larger than the number of pins of the connector CN1. As shown in FIG. 2A, one side (such as the left side of the figure) of the footprint region 120 where the connector CN2 reliable pads 121-12N are located is soldered in such a manner as to align the pads 121-123. The number of pins of the connector CN3 shown in FIG. 2C is equal to the number of pads 121~12N. Therefore, the connector CN3 can be coupled to the opposite pads 121~12N one-to-one according to the positions of the pads. .

Please refer to FIG. 3A and FIG. 3B. FIG. 3A and FIG. 3B are respectively partial circuit diagrams of the wire switcher 130 according to the embodiment of the present invention. In the illustration of FIG. 3A, if the signal transmission wire TS1 needs to select one of the signal transmission wires CS1 to CS3 for coupling according to the type of the connector, if the signal transmission wire TS1 is based on When the type of the connector needs to be connected to the signal transmission wire CS1, a jumper 131 may be placed between the signal transmission wire TS1 and the signal transmission wire CS1 to make the signal transmission wire TS1 and the signal transmission wire. CS1 is coupled to each other. In contrast, if the signal transmission wire TS1 should be coupled to the signal transmission wire CS2 or CS3, the jumper 131 is removed and the jumper 132 or 133 is configured to couple the signal transmission wire TS1 to the signal transmission. Take the wire CS2 or CS3.

Further, in the drawing of FIG. 3B, the connection relationship between the signal transmission wires TS1 and CS1 to CS3 may be changed by the selection switch. The selection switch SWS is disposed on the transmission wires CS1 to CS3 connecting the pads 121 to 12N and the signal transmission wires TS1 connected to the processor 140. between. The selection switch SWS can be switched according to the type of the connector to connect the signal transmission wire TS1 to one of the signal transmission wires CS1 to CS3.

The selection switch SWS and the jumpers 131-133 described above with respect to FIGS. 3A and 3B are configured in a plurality of embodiments in the present invention. Moreover, the manner of its configuration is not limited to the manners illustrated in FIGS. 3A and 3B, and the connection selection between the signal transmission wires well known to those skilled in the art can be applied to the wire switcher 130.

Referring to FIG. 4, FIG. 4 is a partial circuit diagram of a control circuit 400 according to an embodiment of the present invention. The control circuit 400 includes a selection signal generator 410 and a processor 440. The selection signal generator 410 is coupled to the processor 440 and configured to provide selection signals SSEL1 S SSEL2. In an embodiment of the invention, the number of select signals SSEL1 S SSEL2 may be determined depending on the type of connector to which the control circuit 400 may be connected. Briefly, when the connector to which the control circuit 400 is connected has two forms, the selection signal generator 410 only needs to provide one selection signal (one selection signal can decode up to two types), and when the control circuit 400 When there are three to four forms of connectors that may be connected, the selection signal generator 410 only needs to provide two selection signals SSEL1 and SSEL2 (the two selection signals can decode up to four types), if the control circuit 400 is likely to be connected When the connector has more types, the analog signal generator 410 can be used to know the number of selection signals to be provided by the selection signal generator 410.

FIG. 5 is a schematic diagram showing an embodiment of a selection signal generator 410 according to an embodiment of the present invention. In the depiction of FIG. 5, select signal generator 410 includes resistors R1 and R2. The resistor R1 can be selectively coupled to one of the power supply voltage VDD or the ground voltage GND, and the selection signal SSEL1 is generated at the other end of the resistor R1. Similarly, the resistor R2 can also be selectively coupled to one of the power supply voltage VDD or the ground voltage GND, and generate a selection signal SSEL2 at the other end of the resistor R2. That is, the selection signals SSEL1 and SSEL2 can generate four possible combinations depending on whether the connected resistors R1 and R2 are connected to the power supply voltage VDD or the ground voltage GND. Therefore, the selection signals SSEL1 and SSEL2 generated by the selection signal generator 410 can provide a connector (connection interface) in which the control circuit of the electronic device can use up to four different types.

Please refer to FIG. 6. FIG. 6 is a schematic diagram of a display device 500 according to an embodiment of the present invention. The display device 500 includes a circuit substrate 510, pads 511 to 51N, a wire switch 530, a processor 540, a connector 570, and a display module 590. The pads 521 to 52N are disposed in the footprint region 520 on the circuit substrate 510. The pads 521-52N form a leadframe structure and are provided for soldering to a connector 570 for connecting the display module 590. Moreover, the connector 570 provides an interface between the display module 590 and the processor 540 on the circuit substrate 510 for control signal transmission.

In this embodiment, the connector 570 may include a Red, Green, and Blue (RGB) control interface, a Mobile Phone Partnership Initiative (MPPI) transmission interface, and a mobile display digital interface (Mobile Display). Digital Interface (MDDI) and a variety of different transmission interfaces such as the Mobile Industry Processor Interface (MIPI), and details on how the wire switcher 530 operates according to the type of the connector 570 are in the foregoing embodiment. There are related instructions, the following will not repeat.

In summary, the present invention utilizes a plurality of pads of a fixed position layout to form lead frames, and the lead frames formed by the pads are provided for connection to one of a plurality of different types of connectors. At the same time, depending on the type of connector to be connected, a wire switcher is utilized to select the manner in which the signal transmission wires on the processor are connected to the pads. In this way, the same control circuit can be applied to electronic devices of different interfaces, which effectively reduces the preparation and assembly process of the electronic device.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100. . . Control circuit

110, 510. . . Substrate

121~12N, 521~52N. . . Solder pad

140, 440, 540. . . processor

130, 530. . . Wire switcher

120, 520. . . Footprint area

410, 510. . . Select signal generator

500. . . Display device

590. . . Display module

CS1~CSM, TS1~TSP. . . Signal transmission wire

CN1~CN3, 570. . . Connector

131~133. . . Jumper

SWS. . . switch

SSEL1~SSEL2. . . Selection signal

VDD. . . voltage

GND. . . Ground voltage

R1, R2. . . resistance

FIG. 1 is a schematic diagram of a control circuit 100 of an electronic device according to an embodiment of the invention.

2A, 2B, and 2C are schematic views respectively showing the connection manner of the pads 121 to 12N and the connector according to the embodiment of the present invention.

3A and 3B are respectively partial circuit diagrams of a wire switcher 130 according to an embodiment of the present invention.

4 is a partial circuit diagram of a control circuit 400 in accordance with an embodiment of the present invention.

FIG. 5 is a schematic diagram of an embodiment of a selection signal generator 410 in accordance with an embodiment of the present invention.

FIG. 6 is a schematic diagram of a display device 500 according to an embodiment of the invention.

100. . . Control circuit

110. . . Substrate

121~12N. . . Solder pad

140. . . processor

130. . . Wire switcher

120. . . Footprint area

CS1~CSM, TS1~TSP. . . Signal transmission wire

Claims (10)

A control circuit for an electronic device includes: a circuit substrate; a plurality of pads disposed in a footprint region of the circuit substrate, the pads being coupled to a connector, wherein the connector transmits a majority a control signal, the number of pins of the connector is not greater than the number of pads; a processor disposed on the circuit substrate to connect a plurality of signal transmission wires; and a wire switcher disposed on the footprint The pads and the processor are coupled between the area and the processor, and the manner in which the signal transmission wires are connected to the pads is selected according to the form of the connector. The control circuit of claim 1, wherein the processor receives at least one selection signal, and the processor determines the form of the connector according to the selection signal. The control circuit of claim 1, further comprising: a selection signal generator coupled to the processor, comprising: at least one resistor coupled to a power supply voltage or a ground voltage, and This selection signal is generated. The control circuit of claim 1, wherein the wire switch comprises: a plurality of selection switches coupled between the pads and the signal transmission wires, each of the selection switches being determined according to the selection signal The connection relationship between each of the pads and the signal transmission wires. The control circuit of claim 1, wherein the wire switch comprises: a plurality of jumpers coupled between the pads and the signal transmission wires, each of the jumpers The connection relationship between each of the pads and the signal transmission wires is determined according to the selection signal. A display device has a display module and a connector. The display module transmits a plurality of control signals through the connector, including: a circuit substrate; a plurality of pads, and a footprint disposed on the circuit substrate In the area, the pads are coupled to the connector, the connector transmits the control signals, and the number of pins of the connector is not greater than the number of the pads; a processor is disposed at a plurality of signal transmission wires are connected to the circuit board; and a wire switch is disposed between the footprint area and the processor, coupled to the pads and the processor, and the device is selected according to the form of the connector The manner in which the signal transmission wires are connected to the pads. The display device of claim 6, wherein the processor receives at least one selection signal, and the processor determines the form of the connector according to the selection signal. The display device of claim 6, further comprising: a selection signal generator coupled to the processor, comprising: at least one resistor coupled to a power supply voltage or a ground voltage, and A bit of the selection signal is generated. The display device of claim 6, wherein the wire switch comprises: a plurality of selection switches coupled between the pads and the signal transmission wires, each of the selection switches being determined according to the selection signal The connection relationship between each of the pads and the signal transmission wires. The display device of claim 6, wherein the wire switch comprises: a plurality of jumpers coupled between the pads and the signal transmission wires, each of the jumpers The connection relationship between each of the pads and the signal transmission wires is determined according to the selection signal.