Electronic circuit board

Abstract

The invention provides an electronic circuit board. The electronic circuit board comprises a direct-current power supply connector, a universal serial bus type-C connector, a buck-boost converter, an image processing circuit and a power supply transmission controller, the universal serial bus type-C connector is used for being detachably connected to equipment to be tested. The image processing circuit provides an image signal. The power supply transmission controller converts the image signal into a pair of differential signals, and controls the power supply voltage output by the buck-boost converter to meet the power supply demand of the to-be-tested device. And transmitting the pair of differential signals and the power supply voltage through the universal serial bus C-type connector to drive the equipment to be tested to display a test image. According to the electronic circuit board disclosed by the invention, the power supply voltage and the image data corresponding to the to-be-tested equipment with different power supply requirements are provided through the universal serial bus C-type connector, and only one transmission line needs to be connected again when the to-be-tested equipment is replaced in the verification and test of the display, so that the verification efficiency is improved, and the replacement cost is reduced.

Description

Technical Field

[0001] This case relates to an electronic circuit board, and more particularly, to an electronic circuit board that supports automatic power level switching and the integration and conversion of multiple digital image signals. Background Art

[0002] During the development or verification phase of a display, reliability verification (e.g., aging test) is performed to verify whether the display to be tested meets the specifications. During the reliability verification, the image data from the image source is transmitted to the display via a transmission line. If the image source cannot provide power suitable for the display, an additional power line will need to be connected to the display in order to drive the display. However, during these tests, a large number of displays may need to be replaced repeatedly. The more lines connected to the display, the more lines need to be reconnected when changing or replacing it, which reduces the verification efficiency and increases the cost. On the other hand, some special instruments that can provide power to the display are expensive. When testing a large number of displays at the same time, a large number of expensive instruments are required, which is costly.

[0003] Therefore, how to provide an electronic circuit board to solve the above problems is an important issue in the art. Summary of the Invention

[0004] The present disclosure provides an electronic circuit board. The electronic circuit board includes a DC power connector, a Universal Serial Bus (USB) C-type connector, a buck-boost converter, an image processing circuit, and a power transmission controller. The DC power connector is detachably connected to an adapter. The USB C-type connector is detachably connected to a device under test. The buck-boost converter is electrically connected between the DC power connector and the USB C-type connector. The image processing circuit is used to provide an image signal. The power transmission controller is electrically connected to the buck-boost converter, the image processing circuit, and the USB C-type connector. The power transmission controller is used to convert the image signal into a pair of differential signals and control the power supply voltage output by the buck-boost converter to meet the power supply requirements of the device under test. The pair of differential signals and the power supply voltage are transmitted via the USB C-type connector to drive the device under test to display a test image.

[0005] The electronic circuit board disclosed in the present document, wherein the USB Type-C connector includes an ultra-high-speed differential signal channel, wherein the power transmission controller converts the image signal into the pair of differential signals and transmits the pair of differential signals through the ultra-high-speed differential signal channel.

[0006] The electronic circuit board disclosed herein has a universal serial bus (USB) Type-C connector including a configuration channel and a bus power line. A power transmission controller obtains power requirements of a device under test (DUT) via the configuration channel. A buck-boost converter converts power provided by an adapter into a power voltage and transmits the power voltage that meets the power requirements via the bus power line.

[0007] In the electronic circuit board disclosed in the present document, the power transmission controller is electrically connected to the feedback pin of the buck-boost converter.

[0008] In the electronic circuit board disclosed in the present document, the power transmission controller provides a feedback signal to the feedback pin according to the power requirement of the device under test, so that the buck-boost converter provides a power voltage that meets the power requirement of the device under test according to the potential of the feedback pin.

[0009] The electronic circuit board of the present disclosure further includes a first resistor, a plurality of second resistors, and a dip switch. The first resistor is electrically connected between the output terminal of the buck-boost converter and a feedback pin. The dip switch is electrically connected to the feedback pin and is used to electrically connect the feedback pin of the buck-boost converter to one of the plurality of second resistors to change the potential of the feedback pin according to test requirements.

[0010] In the electronic circuit board of the present disclosure, the power supply voltage, the feedback signal, the first resistor, and one of the plurality of second resistors satisfy the following formula:

[0011] V BUS_OUT =V FB *(1+RA / RB)

[0012] Where V BUS_OUT Represents the power supply voltage, V FB represents the potential of the feedback signal, RA represents the resistance value of the first resistor, and RB represents the resistance value of the one of the plurality of second resistors.

[0013] The electronic circuit board of the present disclosure further includes a first connector. The first connector is electrically connected to the image processing circuit and is configured to detachably connect to the electronic device. When the first connector is connected to the electronic device, the first connector receives an input image signal from the electronic device. In the factory mode, the image processing circuit generates an image signal based on a preset image; and in the normal mode, the image processing circuit generates an image signal based on the input image signal.

[0014] In the electronic circuit board disclosed herein, the input image signal is a high-definition multimedia interface signal or a digital video interface signal, and the image signal is an embedded digital video interface signal.

[0015] The electronic circuit board of the present disclosure further includes a second connector. The second connector is electrically connected to a data channel of the USB-C connector for detachably connecting to an electronic device. When the second connector is connected to the electronic device, the second connector receives a pair of USB 2.0 differential signals from the electronic device. In factory mode, the USB-C connector transmits a power supply voltage and an image signal; and in normal mode, the USB-C connector transmits a power supply voltage and a pair of USB 2.0 differential signals.

[0016] In summary, the electronic circuit board disclosed herein can generate a corresponding power voltage based on the power requirements of the device under test (DUT). Furthermore, the electronic circuit board transmits the power voltage and image data to the DUT via a USB Type-C connector. Thus, the electronic circuit board can provide DUTs with varying power requirements with corresponding power voltages and image data via the USB Type-C connector, thereby improving verification efficiency and reducing replacement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To make the above and other objects, features, advantages and embodiments of the present disclosure more apparent and understandable, the accompanying drawings are described as follows:

[0018] Figure 1 is a schematic diagram of a testing device according to some embodiments of the present disclosure;

[0019] Figure 2 is a schematic diagram of an electronic circuit board according to some embodiments of the present disclosure;

[0020] Figure 3A as well as Figure 3B is a schematic diagram of a preset screen according to some embodiments of the present disclosure;

[0021] Figure 4A as well as Figure 4B This is a default screen according to some embodiments of the present disclosure;

[0022] Figure 5A is a schematic diagram of a testing device according to some embodiments of the present disclosure;

[0023] Figure 5B is a schematic diagram of a testing device according to some embodiments of the present disclosure;

[0024] Figure 5C FIG. 1 is a schematic diagram of a testing device according to some embodiments of the present disclosure.

[0025]

Explanation of symbols

[0026] To make the above and other objects, features, advantages and embodiments of the present disclosure more apparent and understandable, the accompanying symbols are explained as follows:

[0027] 100:Test equipment

[0028] 110:Adapter

[0029] 120: Electronic circuit board

[0030] 122: DC power connector

[0031] 124: USB Type-C connector

[0032] 126:Conversion circuit

[0033] 127:DIP switch

[0034] 128: Buck-Boost Converter

[0035] 129: Switching Circuit

[0036] 130: Transmission Line

[0037] 140,540: Equipment under test

[0038] 142: USB Type-C connector

[0039] 202:HDMI connector

[0040] 204:DP connector

[0041] 206:USB 2.0 connector

[0042] 207:USB 2.0 switch

[0043] 208: Push button switch

[0044] 210: Toggle switch

[0045] 211a, 211b: Light-emitting element

[0046] 212: Flash memory

[0047] 214: Non-volatile memory

[0048] 216: Image processing circuit

[0049] 218: HDMI interface

[0050] 220:DP interface

[0051] 222,224:GPIO interface

[0052] 226:eDP interface

[0053] 227: Image Signal

[0054] 228: Power Transmission Controller

[0055] 229: Differential signal

[0056] 510, 520, 530: Electronic devices

[0057] 512:HDMI connector

[0058] 522:DP connector

[0059] 532:USB2.0 connector

[0060] V PWR :System voltage

[0061] V BUS_OUT :Power supply voltage

[0062] V BUS_CTRL :Control signal

[0063] V FB :Feedback signal

[0064] RA, RB1, RB2, RB3: resistors DETAILED DESCRIPTION

[0065] The following examples are described in detail with accompanying illustrations. However, the examples provided are not intended to limit the scope of this disclosure, and the description of the structural operation is not intended to limit the order of execution. Any device with equivalent functionality resulting from the reconfiguration of the components is within the scope of this disclosure. Furthermore, the illustrations are for illustrative purposes only and are not drawn to scale. To facilitate understanding, identical or similar components will be designated with the same reference numerals throughout the following description.

[0066] Unless otherwise noted, terms used throughout the specification and claims generally have their ordinary meanings in the art, within the context of this disclosure, and within the specific context. Furthermore, the terms "comprising," "including," "having," and "containing," etc., as used herein, are open-ended terms meaning "including, but not limited to," and "and / or" as used herein encompass any and all combinations of one or more of the listed items.

[0067] See also Figure 1 . Figure 1Figure 1 is a schematic diagram of a test device 100 according to some embodiments of the present disclosure. In some embodiments, the test device 100 includes an adapter 110, an electronic circuit board 120, a transmission line 130, and a device under test 140. In some embodiments, the adapter 110 is configured to receive and convert alternating current (e.g., mains power) into direct current (DC). In some embodiments, the adapter 110 provides 12 volts, 19 volts, 20 volts, or 24 volts DC power.

[0068] In some embodiments, the electronic circuit board 120 includes a DC power connector 122 and a Universal Serial Bus Type-C (USB Type-C) connector 124. In some embodiments, the DC power connector 122 of the electronic circuit board 120 is configured to detachably connect to the DC power connector of the adapter 110, thereby transmitting the DC voltage provided by the adapter 110 through the DC power connector 122 of the electronic circuit board 120. In some embodiments, the electronic circuit board 120 supports different DC voltage inputs, such as 12V, 19V, 20V, or 24V DC, and supports full-range voltage startup.

[0069] In some embodiments, the USB Type-C connector 124 of the electronic circuit board 120 is detachably connected to the USB Type-C connector 142 of the device under test 140 via a transmission cable 130. In some embodiments, the transmission cable 130 is a USB Type-C transmission cable. In some embodiments, the device under test 140 is a display under test. In some embodiments, the device under test 140 is an electronic device with a display (e.g., a tablet or a computer).

[0070] In some embodiments, the electronic circuit board 120 can provide image data as a test image for the device under test 140. In some embodiments, the electronic circuit board 120 can convert the DC power input by the adapter 110 into a power supply voltage that meets the power requirements of the device under test 140. In some embodiments, the USB Type-C connector 124 of the electronic circuit board 120 can transmit the aforementioned image data and power supply voltage. In this way, by connecting the USB Type-C connector 124 of the electronic circuit board 120 to the USB Type-C connector 142 of the device under test 140 through a single transmission line 130, the device under test 140 can be driven to display the image under test. In this case, when the device under test is replaced, it is only necessary to reconnect the single transmission line to drive the device under test to display the image under test, which can greatly improve efficiency and thereby reduce costs.

[0071] See also Figure 1 as well as Figure 2 , Figure 2FIG. 1 is a schematic diagram of an electronic circuit board 120 according to some embodiments of the present disclosure. Figure 2 As shown, electronic circuit board 120 includes a DC power connector 122, a USB Type-C connector 124, a conversion circuit 126, a dip switch 127, a buck-boost converter 128, a switch circuit 129, a High Definition Multimedia Interface (HDMI) connector 202, a DisplayPort (DP) connector 204, a Universal Serial Bus 2.0 (USB 2.0) connector 206, a USB 2.0 switch 207, a push button switch 208, a dip switch 210, light-emitting elements 211a and 211b, a flash memory 212, a non-volatile memory 214, an image processing circuit 216, and a power transmission controller 228. In some embodiments, electronic circuit board 120 is a printed circuit board assembly (PCBA). In some embodiments, electronic circuit board 120 is a system board.

[0072] In some embodiments, the DC power connector 122 is electrically connected to the input end of the conversion circuit 126, and the DC power connector 122 is used to transmit the DC voltage DC_IN provided by the adapter 110 to the input end of the conversion circuit 126. In some embodiments, the conversion circuit 126 includes a plurality of voltage converters for converting the DC voltage DC_IN into at least one system voltage V PWR In some embodiments, the conversion circuit 126 includes four voltage converters. The input end of the first voltage converter is electrically connected to the DC power connector 122 to convert the DC voltage DC_IN into a voltage of 12 volts. The input end of the second voltage converter is electrically connected to the output end of the first converter to convert the 12 volts into a voltage of 5 volts. The input ends of the third and fourth voltage converters are electrically connected to the output end of the second voltage converter to convert the 5 volts into 3.3 volts and 0.95 volts, respectively. In some embodiments, the 5 volts, 3.3 volts, and 0.95 volts output by the second, third, and fourth voltage converters are used as the system voltage V PWR The power is provided to the power transmission controller 228 and the image processing circuit 216 in the electronic circuit board 120 to supply power to the power transmission controller 228 and the image processing circuit 216 .

[0073] In some embodiments, the DC power connector 122 is electrically connected to the input end of the buck-boost converter 128, and the DC power connector 122 is used to transmit the DC voltage DC_IN provided by the adapter 110 to the input end of the buck-boost converter 128, so that the buck-boost converter 128 converts the DC voltage DC_IN into a power voltage V BUS_OUT In some embodiments, the DC voltage DC_IN input to the buck-boost converter 128 can be greater than or less than the power supply voltage V output by the buck-boost converter 128. BUS_OUT In some embodiments, the power supply voltage V output by the buck-boost converter 128 is BUS_OUT 5 volts, 12 volts, 15 volts and 20 volts.

[0074] In some embodiments, the USB Type-C connector 124 includes pins A1 to A12 and pins B1 to B12. Pins A1, A12, B1, and B12 of the USB Type-C connector 124 function as ground lines. In some embodiments, pins A2, A3, B2, and B3 of the USB Type-C connector 124 function as the super-speed differential signaling channel TX. In some embodiments, pins A4, A9, B4, and B9 of the USB Type-C connector 124 function as the bus power line VBUS. In some embodiments, pins A5 and B5 of the USB Type-C connector 124 function as the configuration channel CC. In some embodiments, pins A6, A7, B6, and B7 of the USB Type-C connector 124 function as the data channels D+ and D-. In some embodiments, pins A8 and B8 of the USB Type-C connector 124 function as the sideband use channel SBU. In some embodiments, the A10, A11, B10, and B11 pins of the USB Type-C connector 124 are used as super-speed differential signal channels RX.

[0075] In some embodiments, when the USB Type-C connector 124 connects the electronic circuit board 120 to the device under test 140, the power transmission controller 228 obtains the power demand of the device under test 140 through the configuration channel CC and generates a control signal V according to the power demand of the device under test 140. BUS_CTRL The switch circuit 129 is controlled to conduct the path from the output end of the buck-boost converter 128 to the bus power line VBUS of the USB Type-C connector 124, and generate a feedback signal V FB The feedback pin of the buck-boost converter 128 is connected to the feedback pin of the buck-boost converter 128, so that the buck-boost converter 128 converts the DC voltage DC_IN into a power supply voltage V that meets the power supply requirement of the device under test 140 according to the potential of the feedback pin. BUS_OUTIn some embodiments, the output of the buck-boost converter 128 as the power supply voltage V can be changed by directly controlling / adjusting the potential of the feedback pin of the buck-boost converter 128. BUS_OUT In some embodiments, the feedback signal V FB The power supply voltage V output by the buck-boost converter 128 BUS OUT The relationship between , current and power can be shown in Table 1 below.

[0076]

[0077]

[0078] Table 1

[0079] In this way, the power transmission controller 228 controls the potential of the feedback pin of the buck-boost converter 128 according to the power requirement of the device under test 140, so that the buck-boost converter 128 converts the DC voltage DC_IN into the power supply voltage V BUS_OUT and transmits the power supply voltage V via the bus power line VBUS of the USB Type-C connector 124 BUS_OUT to the device under test 140 .

[0080] In some embodiments, insufficient supply voltage may cause abnormal display of the display. During the verification phase, a compatibility test is performed to test whether the deviation of the supply voltage will cause abnormal display of the display. To meet the requirements of the compatibility test, by connecting one of the resistors RB1-RB3 to the feedback pin of the buck-boost converter 128 to change the potential of the feedback pin, the power supply voltage V can be adjusted within a certain range (e.g., 0.95% to 1.05%). BUS_OUT . In terms of architecture, the resistor RA is electrically connected between the output terminal and the feedback pin of the buck-boost converter 128, and the resistors RB1-RB3 are electrically connected between the feedback pin of the buck-boost converter 128 and the ground terminal, wherein the resistance values ​​of the resistors RB1-RB3 are different from each other. In some embodiments, the operator can use the dip switch 127 to connect one of the resistors RB1-RB3 to the feedback pin of the buck-boost converter 128 to adjust the power supply voltage V BUS_OUT In some embodiments, the power supply voltage V BUS_OUT , feedback signal V FB , the resistor RA and the one of the resistors RB1 to RB3 conform to the following formula.

[0081] V BUS_OUT =V FB *(1+RA / RB)

[0082] In the above formula, RA represents the resistance value of the resistor RA, and RB represents the resistance value of one of the resistors RB1 to RB3 connected to the feedback pin. For example, assuming that the feedback signal V FB is 0.5 volts, RA is equal to 4.99k ohms, and the feedback signal V FB The power supply voltage V output by the buck-boost converter 128 is 0.5 volts. BUS_OUT Thus, by slightly changing / adjusting the potential of the feedback pin, the power supply voltage V can be changed within a certain range. BUS_OUT , thereby performing compatibility testing on the device under test 140.

[0083] In some embodiments, the image processing circuit 216 is an image processing integrated circuit. In some embodiments, the image processing circuit 216 is a scaler integrated circuit (Scalar IC). In some embodiments, the image processing circuit 216 can be implemented by a system on a chip (SOC). In some embodiments, the image processing circuit 216 includes an embedded DisplayPort (eDP) interface 226 to provide an image signal 227 in accordance with the eDP format. In some embodiments, the image processing circuit 216 and the power transmission controller 228 transmit the image signal 227 via four data lanes.

[0084] In some embodiments, the power transmission controller 228 converts the image signal 227 into a pair of differential signals 229 and transmits the differential signals 229 via the super-speed differential signal channels RX and TX of the USB Type-C connector 124. In some embodiments, the differential signals 229 are super-speed differential signals.

[0085] In some embodiments, the image processing circuit 216 further includes an HDMI interface 218, a DisplayPort interface 220, and general-purpose input / output (GPIO) interfaces 222 and 224. In some embodiments, the push button switch 208, the toggle switch 210, the light-emitting elements 211a and 211b, the HDMI connector 202, the DisplayPort connector 204, the flash memory 212, and the non-volatile memory 214 are electrically connected to the image processing circuit 216. In some embodiments, the light-emitting elements 211a and 211b are light-emitting diodes. In some embodiments, the flash memory 212 and the non-volatile memory 214 store instructions and data for access by the image processing circuit 216. In some embodiments, the flash memory 212 stores the main program of the image processing circuit 216.

[0086] In some embodiments, the GPIO interface 224 of the image processing circuit 216 receives a signal from the toggle switch 210 to switch modes, including factory mode and normal mode, and notifies the user of the current operating mode via the light-emitting element 211b. In some embodiments, in factory mode, the image processing circuit 216 generates an image signal 227 based on a preset image. In some embodiments, in normal mode, the image processing circuit 216 generates an image signal 227 based on a signal provided by a signal source.

[0087] See also Figure 3A 、 Figure 3B 、 Figure 4A as well as Figure 4B . Figure 3A as well as Figure 3B FIG. 1 is a schematic diagram of a preset screen according to some embodiments of the present disclosure. Figure 4A as well as Figure 4B The default screen of some embodiments of the present disclosure. In some embodiments, in the factory mode, the image processing circuit 216 generates an image signal 227 according to the default screen, and the power transmission controller 228 converts the image signal 227 into a pair of differential signals to transmit the differential signals and the power voltage V through the USB Type-C connector 124. BUS_OUT The device under test 140 is provided with a test image, so that the device under test 140 displays a test image.

[0088] In some embodiments, in normal mode, the GPIO interface 222 of the image processing circuit 216 receives a signal from the button switch 208 to switch the image signal source, where the image signal source includes an electronic device that provides an HDMI signal, a DP signal, or a USB2.0 signal (for example, an image signal generator, a computer, a notebook computer, or other image signal source device).

[0089] See also Figure 2 as well as Figure 5A , Figure 5A FIG. 5 is a schematic diagram of a testing device 500a according to some embodiments of the present disclosure. Figure 5AAs shown, the test equipment 500a includes an adapter 110, an electronic circuit board 120, a transmission line 130, and an electronic device 510. In some embodiments, the electronic device 510 is an HDMI video signal source device. In some embodiments, the electronic device 510 has an HDMI interface. In some embodiments, the HDMI connector 512 of the electronic device 510 is detachably connected to the HDMI connector 202 of the electronic circuit board 120 via a transmission line. In some embodiments, signal transmission between the HDMI connector 202 of the electronic circuit board 120 and the image processing circuit 216 is performed using an architecture that minimizes transmission differential signals. In some embodiments, when the HDMI connector 512 of the electronic device 510 is connected to the HDMI connector 202 of the electronic circuit board 120, the signal source of the image processing circuit 216 can be switched by the button switch 208, so that the image processing circuit 216 converts the HDMI signal provided by the electronic device 510 into the image signal 227. In some embodiments, the power transmission controller 228 converts the image signal 227 into a pair of differential signals to transmit the differential signals and the power voltage V through the USB Type-C connector 124. BUS_OUT In some embodiments, the device under test 540 corresponds to Figure 1 The device under test 140.

[0090] See also Figure 2 as well as Figure 5B , Figure 5B FIG. 5 is a schematic diagram of a test device 500b according to some embodiments of the present disclosure. Figure 5B As shown, the test equipment 500b includes an adapter 110, an electronic circuit board 120, a transmission line 130, and an electronic device 520. In some embodiments, the electronic device 520 is a DP image signal source device. In some embodiments, the electronic device 520 has a DP interface. In some embodiments, the DP connector 522 of the electronic device 520 is detachably connected to the DP connector 204 of the electronic circuit board 120 via a transmission line. In some embodiments, signal transmission is performed between the DP connector 204 of the electronic circuit board 120 and the image processing circuit 216 via 4 lanes. In some embodiments, when the DP connector 522 of the electronic device 520 is connected to the DP connector 204 of the electronic circuit board 120, the signal source of the image processing circuit 216 can be switched by the button switch 208, so that the image processing circuit 216 converts the DP signal provided by the electronic device 520 into an image signal 227. In some embodiments, the power transmission controller 228 converts the image signal 227 into a pair of differential signals to transmit the differential signals and the power voltage V through the USB Type-C connector 124. BUS_OUTThe device under test 540 is provided with a test image, so that the device under test 540 displays a test image.

[0091] See Figure 2 as well as Figure 5C , Figure 5C FIG. 5 is a schematic diagram of a testing device 500c according to some embodiments of the present disclosure. Figure 5C As shown, test equipment 500c includes an adapter 110, an electronic circuit board 120, a transmission line 130, and an electronic device 530. In some embodiments, the electronic device 520 is a USB video signal device. In some embodiments, the electronic device 520 has a USB 2.0 interface. In some embodiments, a USB 2.0 connector 532 of the electronic device 520 is detachably connected to the USB 2.0 connector 206 of the electronic circuit board 120 via the transmission line. In some embodiments, when the USB 2.0 connector 532 of the electronic device 520 is connected to the USB 2.0 connector 206 of the electronic circuit board 120, the USB 2.0 connector 532 of the electronic device 520 receives a pair of USB 2.0 differential signals from the electronic device 520. In some embodiments, when the USB 2.0 connector 532 of the electronic device 530 is connected to the USB 2.0 connector 206 of the electronic circuit board 120, the button switch 208 can switch the signal source of the image processing circuit 216, so that the USB 2.0 switch 207 conducts the path from the USB 2.0 connector 206 to the USB Type-C connector, thereby transmitting the USB 2.0 differential signal and the power supply voltage V through the USB Type-C connector 124. BUS_OUT The device under test 540 is provided with a test image, so that the device under test 540 displays a test image.

[0092] In some embodiments, users can transmit serial clock and serial data signals to the image processing circuit 216 via an HDMI transmission cable to update the firmware of the image processing circuit 216. In some embodiments, users can transmit D+ / D- data signals to the power transmission controller 228 via a USB-B transmission cable to update the firmware of the power transmission controller 228.

[0093] In summary, the electronic circuit board 120 of the present disclosure generates a corresponding power supply voltage based on the power requirements of the device under test (DUT). Furthermore, the electronic circuit board 120 transmits the power supply voltage and image data to the DUT via the USB-C connector 124. Thus, because the electronic circuit board 120 can provide the corresponding power supply voltage and image data to DUTs with different power requirements via the USB-C connector 124, replacing the DUT only requires reconnecting a single transmission line, thereby improving verification efficiency and reducing replacement costs. Furthermore, the electronic circuit board 120 of the present disclosure supports multiple signal sources, allowing customers to configure test screens through the electronic device.

[0094] Although the present disclosure has been disclosed above in the form of embodiments, this is not intended to limit the present disclosure. Anyone with ordinary knowledge in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure should be determined by the appended claims.

Claims

1. An electronic circuit board, characterized in that: Include: a DC power connector for detachably connecting to an adapter; a USB Type-C connector for detachably connecting to a device under test; a buck-boost converter electrically connected between the DC power connector and the USB Type-C connector; an image processing circuit for providing an image signal; as well as A power transmission controller is electrically connected to the buck-boost converter, the image processing circuit, and the USB Type-C connector. The power transmission controller is used to: converting the image signal into a pair of differential signals; as well as A power supply voltage output by the buck-boost converter is controlled to meet a power supply requirement of the device under test, and wherein, The pair of differential signals and the power supply voltage are transmitted through the universal serial bus C-type connector to drive the device under test to display a test image.

2. The electronic circuit board according to claim 1, wherein: The USB Type-C connector includes: An ultra-high-speed differential signal channel, wherein the power transmission controller converts the image signal into the pair of differential signals and transmits the pair of differential signals through the ultra-high-speed differential signal channel.

3. The electronic circuit board according to claim 1, wherein: The USB Type-C connector includes: a configuration channel, wherein the power transmission controller obtains the power requirement of the device under test through the configuration channel; and A bus power line, wherein the buck-boost converter converts a power source provided by the adapter into the power voltage and transmits the power voltage meeting the power requirement through the bus power line.

4. The electronic circuit board according to claim 1, wherein: The power transmission controller is electrically connected to a feedback pin of the buck-boost converter.

5. The electronic circuit board according to claim 4, wherein: The power transmission controller provides a feedback signal to the feedback pin according to the power requirement of the device under test, so that the buck-boost converter provides the power voltage meeting the power requirement of the device under test according to a potential of the feedback pin.

6. The electronic circuit board according to claim 5, wherein: Also includes: a first resistor electrically connected between the output terminal of the buck-boost converter and the feedback pin; a plurality of second resistors; and A dip switch is electrically connected to the feedback pin, and is used to electrically connect the feedback pin of the buck-boost converter to one of the plurality of second resistors, so as to change the potential of the feedback pin according to a test requirement.

7. The electronic circuit board according to claim 6, wherein: The power supply voltage, the feedback signal, the first resistor, and the one of the plurality of second resistors satisfy the following formula: V BUS_OUT =V FB *(1+RA / RB) Where V BUS_OUT Represents the power supply voltage, V FB represents the potential of the feedback signal, RA represents the resistance value of the first resistor, and RB represents the resistance value of the one of the plurality of second resistors.

8. The electronic circuit board according to claim 1, wherein: Also includes: a first connector electrically connected to the image processing circuit for detachably connecting to an electronic device, wherein when the first connector is connected to the electronic device, the first connector receives an input image signal from the electronic device, wherein, In a factory mode, the image processing circuit generates the image signal according to a preset image; and In a general mode, the image processing circuit generates the image signal according to the input image signal.

9. The electronic circuit board according to claim 8, wherein: The input image signal is a high-definition multimedia interface signal or a digital video interface signal, and the image signal is an embedded digital video interface signal.

10. The electronic circuit board according to claim 1, wherein: Also includes: a second connector electrically connected to a data channel of the USB Type-C connector for detachably connecting to an electronic device, wherein when the second connector is connected to the electronic device, the second connector receives a pair of USB 2.0 differential signals from the electronic device, wherein: In a factory mode, the USB Type-C connector transmits the power voltage and the image signal; and In a normal mode, the USB Type-C connector transmits the power voltage and the pair of USB 2.0 differential signals.

Images