TWI412758B - A system and adapter utilizing a power supply and a display device to test circuits of different types of main boards - Google Patents

Abstract

A system utilizing a power supply and a display device to test circuits of different types of main boards includes a power supply, a display device and an adapter. The adapter comprises a first circuit and a second circuit. The first circuit converts the power generated from the power supply to a power required by each type of the main board. The second circuit converts the control signal generated from the main board to a signal format to be used in a testing procedure of the display device. Through the use of the system utilizing a power supply and a display device to test different main boards, there is no need to replace different modules when testing the circuits of different types of the main boards, thereby reducing the testing costs.

Description

Device and switching device for sharing power and display to detect different motherboard circuits

The invention relates to a testing device and a switching device for a liquid crystal display device assembly, in particular to a main board detecting device and a switching device of a liquid crystal display device.

Referring to FIG. 1, when the current production line tests the motherboard circuit 90 of, for example, a liquid crystal television (LCD TV), the usual method is to select a corresponding power supply substrate (POWER BOARD) 91 and a liquid crystal display (LCD PANEL) 92 for the LCD TV model. And the connection of the guide wires 901 to 903 for testing; however, when the model of the motherboard circuit 90 to be tested is changed, the surrounding test equipment including the power substrate 91, the liquid crystal display 92, and the connection wires 901 to 903 need to be fully equipped. Replacement, so the current test method requires the following costs:

1. Machine cost: The single-board motherboard circuit 90 requires a set of power substrate 91 and liquid crystal display 92 designed for the model. The motherboard circuit 90 of different models requires different power substrates 91 and liquid crystal displays. 92. In this way, the power substrate 91 and the liquid crystal display 92 of different sizes and different suppliers are required to be purchased, and the liquid crystal display 92 is also a high unit price, so that the overall test cost cannot be reduced.

2. Manpower and time cost: When the production line replaces the motherboard circuit 90 of different models, because the liquid crystal display 92 suitable for the model must be replaced, the production line needs to arrange more manpower and time to replace.

3. Panel repair cost: Since the liquid crystal display 92 is not a special test equipment, it is used for test equipment for a long time, and its damage rate is very high, and it must be sent to the supplier for maintenance, resulting in maintenance expenses.

4. Guide wire replacement cost: Take the guide wire 903 of the motherboard circuit 90 connected to the liquid crystal display 92 as an example, a cable dedicated to Low-Voltage Differential Signaling (LVDS) is used. For the purpose of the production line test, each test piece of the main board circuit 90 needs to be inserted and removed at least once, which is easy to cause damage, and the guide wire 903 becomes a consumable material, resulting in an increase in consumable expenses.

Therefore, the object of the present invention is to provide a common power supply and display capable of reducing the test cost without having to replace different supporting components when testing the motherboard circuit of different models to detect different motherboard circuit devices and switching devices.

Therefore, the device for sharing power and display to detect different motherboard circuits includes a power supply, a liquid crystal display and a switching device for outputting a predetermined power; the liquid crystal display receiving the circuit of the motherboard A control signal to perform a test procedure. The switching device includes a first circuit and a second circuit; the first circuit is electrically connected between the power supply and the motherboard circuit for converting the predetermined power into a motherboard circuit for supplying different models The second circuit is electrically connected between the motherboard circuit and the liquid crystal display for converting the control signal generated by the motherboard circuit to a signal format required for the liquid crystal display to perform the test procedure.

The switching device for sharing power and display to detect different motherboard circuits includes a first circuit and a second circuit, and the first circuit is electrically connected Between a power supply and a motherboard circuit to be detected, a predetermined power generated by the power supply is converted into a power supply for supplying a motherboard circuit of a different type; the second circuit is electrically connected to Between the motherboard circuit and a display, the control signal generated by the motherboard circuit is converted into a signal format required for the liquid crystal display to perform a test procedure.

The utility model has the advantages that the device and the switching device for detecting the different main board circuits of the common power supply and the display have the advantages that: when testing the motherboard circuit of different models, there is no need to replace different supporting components, thereby saving the test cost of the motherboard circuit and improving the production line. Test the performance of the motherboard circuit.

The foregoing and other objects, features, and advantages of the invention are set forth in the <RTIgt;

I. System Architecture:

Referring to FIG. 2, in a preferred embodiment of the present invention, a test device 100 is used to detect a motherboard circuit 30 for a liquid crystal television. The test device 100 includes a power supply 31, a liquid crystal display 32, and an electrical connection. The switching device 1 between the motherboard circuit 30, the power supply 31, and the liquid crystal display 32.

It is an object of the present invention to provide a test apparatus 100 suitable for testing different types of motherboard circuit 30, whereby the test equipment used in other peripherals includes a power supply 31, a liquid crystal when the type of the motherboard circuit 30 to be tested is changed. The display 32 and the guiding wires 501, 504 for connecting the switching device 1 do not need to be repeatedly inserted or removed, and only the switching device 1 needs to be replaced. Two lead wires 502, 503 between the motherboard circuits 30.

The liquid crystal display 32 has a liquid crystal panel 320, a Timing controller (T-CON BOARD) 321, an inverter unit 322, and a backlight module (CCFL Backlight Unit) 323. The main function is to accept the control of the motherboard circuit 30 and the LVDS signal and display the image; the power supply 31 is used to output the power supply switching device 1 and supply 24V power to the inverter 322.

The switching device 1 includes a first circuit 11 and a second circuit 12. The first circuit 11 is electrically connected between the power supply 31 and the motherboard circuit 30 for receiving predetermined power via the wire 501 and converting it into a supply. The power required by the motherboard circuit 30 is transmitted to the motherboard circuit 30 by the conductive cable 502. The second circuit 12 is electrically connected between the motherboard circuit 30 and the liquid crystal display 32 for receiving the motherboard circuit 30 via the conductive cable 503. A control signal and conversion control and image signals required for the test program of the liquid crystal display 32 are transmitted to the liquid crystal display 32 through the conductive wires 504.

Hereinafter, the switching device 1 is divided into a first circuit 11 and a second circuit 12 to introduce the working principle of the present invention. The related pattern of the first circuit 11 is shown in FIG. 3 to FIG. 7 , and the related pattern of the second circuit 12 is FIG. 8 . To Figure 10.

II. First circuit 11:

Referring to FIG. 2, the function of the first circuit 11 is to receive predetermined power via the wire 501 and convert the power required for supplying the motherboard circuit 30 to the motherboard circuit 30 by the wire 502, thus including the motherboard circuit of the different models. 30 required output voltage of various regulated power supplies.

In the preferred embodiment, the motherboard circuit 30 for testing is electrically connected. The first circuit 11 has a plurality of power pins and two control pins, and the requirements of the power pins are divided into voltages of 15 volts, 12 volts, 5 volts or 3.3 volts, and the first control pin PS_ONA is turned on at a high level or When the low level is turned on, the power requirement of the second control pin AC_drop_D is 3.3 volts forward, 3.3 volts reverse or 12 volts forward.

Referring to FIG. 3, the first circuit 11 includes a first input port 210, a first output port 220, an auto discharge when AC power off module 111, and a DC to DC with DC to DC with DC protection The module 112, a first level converter 110, a second level converter 113, and three sets of electronic switches 301-303.

The conductive wire 502 of the first circuit 11 and the motherboard circuit 30 can be designed according to the power supply voltage requirement of the motherboard circuit 30, that is, selected from the first output port 220 of the first circuit 11, while considering the motherboard circuit 30. The PIN define allows you to design the appropriate connection wires.

The first input port 210 of the first circuit 11 is connected to the power supply 31 and has five sets of pins 15V_CN, 12V_CN, 3V3_MSB, PS_ON and AC_drop_det; the first output port 220 is connected to the motherboard circuit 30 and has seven sets of pins 15VA, 12VA 5V_MCU, 5VA, 3V3_MCU, PS_ONA and AC_drop_D, where the pins PS_ONA and AC_drop_det are control pins, and the rest are power pins.

When the microprocessor (not shown) of the motherboard circuit 30 requires a voltage of 5 volts, the power of the third pin 5V_MCU and the fourth pin 5VA is firstly converted by the DC conversion and overvoltage protection module 112. The first voltage 12 volts of the pin 12V_CN of the input port 210 is converted to the third pin 5V_MCU The second voltage is 5 volts, and the first control pin PS_ONA is controlled by the first level converter 110 to switch the voltage level, and then the electronic switch 303 is controlled to generate the power of the fourth pin 5VA. When the motherboard circuit 30 requires 3.3. When the voltage is volt, the power of the fifth pin 3V3_MCU is directly taken from the pin 3V3_MSB.

Since the power supply 31 does not provide a voltage of 5 volts, the principle of how the DC conversion and overvoltage protection module 112 utilizes the 12 volt conversion provided by the power supply 31 to generate a voltage of 5 volts is explained in detail below.

Referring to FIG. 4A and FIG. 4B, the right half of the DC conversion and overvoltage protection module 112 is separated by a broken line (FIG. 4A), and the DC conversion part and the left part (FIG. 4B) are overvoltage protection parts, and the components are used. The principle is as follows: Refer to FIG. 4A, which is a DC conversion part of the DC conversion and overvoltage protection module 112, which mainly includes several transistors Q8, Q4, Q5 and a PWM controller 40 (model APM7120) and the like, among which The transistor Q8 is an input terminal for receiving 12 volts of the pin 12V_CN (Fig. 3), and the PWM controller 40 is configured to control the output of a PWM power supply through the transistors Q4, Q5, the inductor L2 and the capacitor C13. A switching filter circuit 41 outputs 5 volts to the pin 5V_MCU, and components such as resistors R56, R57 and C16 are used to form a voltage feedback network 42. The component parameters of the voltage feedback network 42 are used to determine the PWM controller 40. The output voltage value.

Referring to FIG. 4B, for the overvoltage protection part of the DC conversion and overvoltage protection module 112, the input voltage is selected from the pin 3.3V_MSB, and when the output pin 5V_MCU voltage is higher than a predetermined voltage, for example, 5.4 volts, the transistor Q6 is turned on, and then inverted by the transistor Q10, causing the transistor Q11 and the transistor Q8 to turn off and turn off the power supply of the PWM controller 40, so that the pin The 5V-MCU output is reduced to 0V, thereby achieving the purpose of protecting the load circuit powered by 5 volts.

Generally, during normal operation, when the pin 12V_CN is powered on, the transistor Q11 is always in the conducting state due to the action of the resistor R40, so that the transistor Q8 is turned on immediately to supply the DC conversion and overvoltage protection module 112; in addition, the transistor Q6, Q10, Q11, diode D4, D10 and resistor R49 form a one-shot self-locking circuit 43. Once the voltage of the pin 5V_MCU rises abnormally, the transistor Q6 will be turned on instantaneously, and the transistor Q6'C is high. The crystal Q10'C is low, the transistor Q11'C is high, D10 is off, the pin 12V_CN passes through the resistor R49, and the diode D4 continues to maintain the resistance R39 (Q6'C) high, ensuring that the transistor Q11 is always in the off state, To achieve unlocking, only reboot after rebooting.

Referring to FIG. 3, for the motherboard circuit 30 of different models, the boot voltage level generated by the first control pin PS_ONA is different, and the first level converter 110 is used to convert the first control pin PS_ONA. The bits of the electronic switches 301 to 303 are turned on or off.

When the motherboard circuit 30 requires a voltage of 15 volts or 12 volts, the input voltage of the first pin 15VA and the second pin 12VA is the pin using the first input port 210 when viewed from the first output port 220. The 15V_CN, 12V_CN power supply is controlled by the first control pin PS_ONA after the first level converter 110 switches the voltage level and then controls the electronic switches 301-302.

5, the first level shifter 110 is a voltage level selection circuit controlled by the first control pin PS_ONA, and the electronic switch 301 connected to one of the paths (pin 15VA) is the transistor Q3, due to other Second road The control principle of pin 12VA, pin 5VA) is similar. The following is only for how to generate 15 volts required for pin 15VA.

The switch unit S1 is selected as the voltage level of the first control pin PS_ONA, the selection 1 is the high voltage level, the selection 3 is the low voltage level, and the transistor Q3 is the electronic switch 301 electrically connected to the pin 15VA. The control signal is provided for the transistor Q7. When the transistor Q3 is turned off, the transistor Q7 is turned off; when the transistor Q3 is turned on, the transistor Q7 is also turned on, and the voltage of 15 volts is output to the pin 15VA, and the LED 1 is turned on.

Referring again to FIG. 3, since the power supply 31 can only generate one AC_drop_det signal, the motherboard circuit 30 to be tested may require three AC_drop_D signals, respectively 3.3 volt forward, 3.3 volt reverse or 12 volt forward voltage. Thus, the preferred embodiment utilizes the concept of "level conversion" to convert a signal to three signals in order to test various motherboard circuits 30.

Therefore, the second level shifter 113 is a level conversion of a predetermined voltage of the second control pin AC_drop_det of the first input port 210, and the output includes 3.3 volts forward, 3.3 volts reverse or 12 volts forward. The voltage control signal is supplied to the second control pin AC_drop_D of the first output port 220.

Referring to FIG. 6, the second level shifter 113 has a control pin AC_drop_det (power supply terminal) for receiving the input of the power supply 31, and the voltage is selected by the input pins 12VA, 3.3V_MSB, and the electronic switches S2 and S3. The switch is further coupled with the transistor Q14 to complete the signal inversion function, and then outputted to the control board pin AC_drop_D (the motherboard circuit terminal) to the motherboard circuit 30, whereby the output includes 3.3 volts forward, 3.3 volts reverse or 12 Volt positive three Voltage level.

Referring to FIG. 7, the automatic discharge module 111 mainly includes a shutdown state recognition circuit 44, a discharge electronic switch 45 (multiplexed), and a plurality of discharge resistors. When the shutdown state recognition circuit 44 detects shutdown, the discharge electrons are used. The switch 45 and the discharge resistors are discharged.

The shutdown identification circuit 44 includes a resistor R1, a diode D1, a capacitor C2, and a transistor Q2. After the power is turned on, the power supply of the pin 12V_CN charges the capacitor C2 via the resistor R1 and the diode D1, so that the E-electrode voltage of the transistor Q2 is close. 12V and has remained unchanged. When the power supply AC is turned off, the voltage of the pin 12V_CN drops, the transistor Q2 is turned on via the resistor R1, and the transistor Q2'C has a high voltage level output. At this time, the diode D1 is turned off, and the capacitor is turned off. C2 can only be discharged through the transistor Q2, and the larger the capacity of the capacitor C2, the longer the sustain discharge time.

The discharge electronic switch 45 comprises a resistor R5, R2, a capacitor C36, and a transistor Q1; the resistors R3 and R22 form a discharge loop of the pin 15V_CN; and the resistor R4 is a pin 12V_CN discharge loop. Since the cost of the transistor is much larger than the diode, In order to save cost and simplify the circuit, the discharge electronic switch of the transistor Q1 is used as a common, so the diode D2 is added to the discharge circuit of the pin 12V_CN for use as an isolation diode, so that these discharge circuits are not affected when the battery is not discharged. With 15 volts and 12 volts working properly, this circuit can also be extended to a 3.3 volt loop discharge.

III. Second circuit 12:

Referring to FIG. 8, the function of the second circuit 12 is to share a liquid crystal display 32 when testing the motherboard circuit 30 of different models, and the second circuit 12 can reduce the type and quantity of the liquid crystal display 32 for testing, thereby saving purchase. liquid The cost of the crystal display 32 does not need to be replaced by the liquid crystal display 32 to save manpower and time for changing the line. In addition, the second circuit 12 further protects the liquid crystal display 32 to reduce the test damage rate and reduce the maintenance cost, and does not need to continuously plug and connect the liquid crystal. The conductive wires 504 of the display 32 can reduce the cost of consumables.

Since the power supply voltage of the motherboard circuit 30 of different LCD TVs, the definition of the LVDS signal pin, and the format of the LVDS signal may be different, the second circuit 12 and the matching conductive wire 503 are required to achieve correct conversion, for testing. The physical resolution requirements of the liquid crystal display 32 can be classified into two types of WXGA (1366X768) and FHD (1920X1080), among which WXGA type models account for more than 80%, and FHD type models currently only account for 80% of the models. 20% or less, of course, in addition to the aforementioned models/models, other LCD TV models/models are also applicable. The preferred embodiment is a liquid crystal display 32 of the model CMO V26B1-L01 with WXGA resolution, and the required power supply is 5 volts. .

The second circuit 12 includes a second input port 410, a second output port 420, an auto adaptive power supply transfer module 121, an ESD protection module 122, and a motherboard format conversion. (LVDS data format setting for M/B) module 123 and LVDS data format setting for panel module 124.

In terms of the wiring wires, the LVDS connector 306 of the motherboard circuit 30 has two types, one for connecting a flexible circuit board (FFC) and the other for connecting a twisted wire (Twist wire), the second input. The 埠410 is an LVDS connector 306 that is electrically connected to the motherboard circuit 30 for receiving a voltage signal of 12 volts or 5 volts and an LVDS data (10 pairs). LVDS data); the liquid crystal display 32 is electrically connected to the second output port 420 by a fixed conductive wire 504. Since it is fixedly connected to the second circuit 12, the different types of the motherboard circuit 30 are not required to be repeatedly inserted and removed. Guide wire 504.

In the preferred embodiment, in terms of interface compatibility and pin assignment, the power pin and LVDS signal pin (including LVDSVDD; GND) are mainly implemented through redesign of the wires 503 and 504. ;LVDSDATA_SET (or SELLVDS); LVDS DATA (TXA0-/+, TXA3-/+, TXB0-/+, TXB3-/+); LVDS CLOCK (TXAC-/+, TXBC-/+)), format setting pin (Format setting pin) redistribution.

In terms of power supply, in the preferred embodiment, the power supply voltage outputted by the motherboard circuit 30 to be tested is 12 volts or 5 volts, so the voltage identification conversion module 121 must be used to convert the 5 volts required for the liquid crystal display 32. .

The function of the voltage identification conversion module 121 is to set the correct working voltage to ensure the same rated voltage as the selected test liquid crystal display 32. The currently settable power supply voltage is 5 volts and 12 volts, and the power supply circuit is selected if selected. The power supply voltage required for the liquid crystal display 32 (such as the model CMO 26VBL01) is 5 volts, and when the power supply voltage output by the motherboard circuit 30 is 5 volts, the voltage recognition conversion module 121 automatically outputs the 5 volt power supply directly to the liquid crystal display 32. If the power supply voltage output from the motherboard circuit 30 is 12 volts, 12 volts is DC-converted (DC to DC) to 5 volts and output to the liquid crystal display 32.

In other embodiments, a liquid crystal display 32 having a required voltage of 12 volts may be selected, if the power supply required for the (reserved design) liquid crystal display 32 is selected. The voltage is 12 volts. At this time, the external 12 volt voltage is supplied. When the power board PANEL_VCC is turned to the effective voltage level after the motherboard circuit 30 is turned on, the 12V power is turned on to the liquid crystal display 32 to ensure the startup timing of the liquid crystal display 32. (POWER ON Sequence) and the original system design unchanged.

The principle of how the voltage identification conversion module 121 converts the voltage from the motherboard circuit 30 or the external voltage to the 5 volt or 12 volt required for the liquid crystal display 32 is explained below.

Referring to FIG. 9, the voltage identification conversion module 121 includes an external power input terminal 70, an external switch 701, a first voltage switch 702, a second voltage switch 703, a motherboard power input terminal 71, an identification circuit 72, and a setting. The unit 73, a reverse module 731, a DC voltage conversion module 74, and a panel power output 75; wherein the external switch 701, the first voltage switch 702, and the second voltage switch 703 are all input high. The level is ON (ON), and the input Low (OFF) is OFF.

In order to ensure the power on/off power supply timing of the liquid crystal display 32, the output voltage of the motherboard circuit 30 is supplied to the main board power input terminal 71, and is divided into 5 volts (first voltage) or 12 volts (first). Two voltages), at this time, the manual operation setting unit 73 has to be set at the first position, and its output is high impedance; or the external power input terminal 70 supplies an external 12 volt (third voltage), at this time, the manual operation setting unit 73 It must be set in the second position, and its output is grounded, as described below.

When the motherboard power input terminal 71 supplies a voltage of 5 volts, the operation setting unit 73 is in the first position, so that the output of the setting unit 73 is high impedance, and the identification circuit 72 of the automatic detection (Auto detect 5V or 12V) outputs the low level. Electricity Pressing, the reverse module 731 becomes a high level voltage, driving the first voltage switch 702 to be turned on and the low voltage of the reverse module 731 is not driven to turn off the second voltage switch 703, thereby passing the first voltage switch 702 The 5 volt voltage is output to the panel power output 75.

When the motherboard power input terminal 71 supplies a voltage of 12 volts, the manual operation setting unit 73 outputs a high level voltage through the automatic detection identification circuit 72 in the first position, and becomes a low level voltage through the reverse module 731, driving the first A voltage switch 702 is turned off and the second voltage switch 703 is turned on without the high level voltage of the reverse module 731, and is converted into a 5 volt voltage output by the DC voltage conversion module 74 to the panel power output terminal 75.

In addition, when the external power input terminal 70 from the outside is not supplied with 5V to supply other voltage power (ie, the third voltage), for example, 3.3V or 12V, etc., at this time, since the setting unit 73 is set at the second position, the output thereof is Grounding, the first voltage switch 702 and the second voltage switch 703 are both turned off, and the external switch 701 is driven to be turned on. Therefore, the panel power output terminal 75 only supplies the required 3.3 or 12 volts from the external power input terminal 70 through the external switch 701. .

Referring to FIG. 8 again, in the electrostatic protection module 122, since the production line is used as a test device, it is susceptible to external electromagnetic interference and accidental charging interference when the operator repeatedly inserts and removes. This type of interference is from the second input of the LVDS signal. The introduction of 410 makes it easy to damage the signal processing input terminal of the timing control board 321 inside the liquid crystal display 32. Therefore, the electrostatic protection module 122 is a hot plug circuit for preventing static electricity (ESD) breakdown to protect the liquid crystal display 32 from being avoided. damage.

FIG. 10 shows the protection of a signal channel by the electrostatic protection module 122. Schematic diagram, if an excessively high positive pulse clutter signal is applied to the input terminal, it will first be limited by the resistor, and then clamped up by a first diode D1 to a predetermined voltage of 3.3V, if there is a spike negative The pulse clutter signal is also first limited by the resistor R, and then pulled down by a second diode D2 to the ground voltage level to achieve the purpose of protecting the back end liquid crystal display 32.

Referring to FIG. 8, the motherboard format conversion module 123 is provided for the motherboard circuit 30, and mainly meets the setting requirements of different liquid crystal televisions (LCDs), so that the motherboard circuit 30 of the liquid crystal television can correctly output the LVDS signals; The panel format conversion module 124 is configured to test the liquid crystal display 32, so that the LVDS signal format that the liquid crystal display 32 can receive is correctly matched with the output signal of the motherboard circuit 30, thereby ensuring that the correct image is displayed.

In summary, when the device 100 and the switching device 1 for detecting different motherboard circuits of the present invention are used to detect the motherboard circuit 30 of different models, there is no need to replace different supporting components, thereby saving the test of the motherboard circuit 30. Cost, and improve the performance of the test board circuit 30 on the production line. When the original design is maintained, a variety of motherboard circuits 30 can be tested, thereby reducing the cost of the factory test equipment, reducing the test loss and improving the production efficiency. The object of the invention is achieved.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

[study]

90‧‧‧ motherboard circuit

91‧‧‧Power substrate

92‧‧‧LCD display

901~903‧‧‧Guide wire

[this creation]

100‧‧‧Test equipment

1‧‧‧Transfer device

11‧‧‧First circuit

110‧‧‧first level converter

111‧‧‧Automatic Discharge Module

112‧‧‧DC conversion and overvoltage protection module

113‧‧‧Second position converter

12‧‧‧Second circuit

121‧‧‧Voltage Identification Conversion Module

122‧‧‧Electrostatic protection module

123‧‧‧ motherboard format conversion module

124‧‧‧ Panel format conversion module

210‧‧‧First Input埠

220‧‧‧First output埠

30‧‧‧ motherboard circuit

301~303‧‧‧Electronic switch

306‧‧‧Connector

31‧‧‧Power supply

32‧‧‧LCD display

320‧‧‧LCD panel

321‧‧‧Time Control Board

322‧‧‧Inverter

323‧‧‧Backlight module

410‧‧‧Second input埠

420‧‧‧Second output埠

501~504‧‧‧ wiring

70‧‧‧ external power input

701‧‧‧External switch

702‧‧‧First voltage switch

703‧‧‧Second voltage switch

71‧‧‧ motherboard power input

72‧‧‧ Identification circuit

73‧‧‧Setting unit

731‧‧‧Reverse module

74‧‧‧DC voltage conversion module

75‧‧‧ Panel power output

Figure 1 is a system block diagram showing the current production line pair such as LCD TV FIG. 2 is a system block diagram illustrating a preferred embodiment of the apparatus for sharing power and display to detect different motherboard circuits of the present invention including a first circuit and a second circuit; FIG. Is a circuit block diagram illustrating the component composition and connection relationship of the first circuit; FIG. 4A is a circuit diagram illustrating that the DC conversion of the first circuit and the overvoltage protection module are separated by a dotted line as a DC conversion portion; 4B is a circuit diagram illustrating that the DC conversion and overvoltage protection module of the first circuit is separated by a dotted line as an overvoltage protection portion; FIG. 5 is a circuit diagram illustrating the related circuit of the first level converter Figure 6 is a circuit diagram illustrating the relevant circuit of the second level converter; Figure 7 is a circuit diagram illustrating the associated circuit of the automatic discharge module; Figure 8 is a circuit block diagram illustrating the component composition and connection of the second circuit Figure 9 is a circuit block diagram illustrating the components of the voltage identification conversion module of the second circuit; and Figure 10 is a schematic diagram illustrating the electrostatic protection module of the second circuit for a signal pass How to protect the road.

100. . . Test Equipment

1. . . Adapter

11. . . First circuit

12. . . Second circuit

30. . . Motherboard circuit

31. . . Power Supplier

32. . . LCD Monitor

320. . . LCD panel

321. . . Timing control board

322. . . Inverter

323. . . Backlight module

501~504. . . wiring

Claims (19)

A device for sharing power and display to detect different motherboard circuits includes: a power supply for outputting a predetermined power; a liquid crystal display receiving a control signal of the motherboard circuit for performing a test procedure; and one rotation The device includes: a first circuit electrically connected between the power supply and the motherboard circuit for converting the predetermined power into a power supply for supplying a motherboard circuit of a different type; a second circuit Electrically connected between the motherboard circuit and the liquid crystal display for converting a control signal generated by the motherboard circuit to a signal format required for the liquid crystal display to perform the test procedure; and a setting unit by grounding Determining a first position or a second position at which the liquid crystal display is supplied through an internal power source of the motherboard circuit, and the liquid crystal is supplied from the external power source not supplied by the motherboard circuit at the second position monitor. The device of claim 1 , wherein the first circuit comprises a first input port electrically connected to the power supply, and is electrically connected to the device according to claim 1 a first output port of the motherboard circuit, a DC conversion and overvoltage protection module bridged between the first input port and the first output port, the first input port has a plurality of power pins, the first The output port has a number of power pins and control pins. The device for detecting different motherboard circuits according to the shared power supply and the display of claim 2, wherein the first circuit further includes a first level converter and a plurality of electronic switches, the first output The input voltages of the first pin and the second pin are controlled by the power of the first input port to receive a first control pin to control the electronic switches after the first level converter switches the voltage level. produce. The device for detecting different motherboard circuits according to the common power supply and the display according to claim 3, wherein the first circuit further comprises an automatic discharge module, wherein the automatic discharge module comprises a shutdown state recognition circuit, The multi-channel shared discharge electronic switch and the plurality of discharge resistors are discharged by the discharge electronic switch and the discharge resistors when the shutdown state recognition circuit detects the shutdown. A device for detecting different motherboard circuits according to the shared power supply and the display according to claim 2, wherein the first circuit further includes a first level converter and an electronic switch, and the first output The power supply of the third pin and the fourth pin is converted by the DC conversion and overvoltage protection module to a predetermined voltage of the pin of the first input port to a power supply for the third pin, and is simultaneously subjected to the first After the control pin switches the voltage level through the first level converter, the electronic switch is controlled to generate the power of the fourth pin. a device for detecting different motherboard circuits according to the shared power supply and display described in claim 2, wherein the first circuit further includes a second level converter, wherein the second level converter is used to After the predetermined voltage of the input port is converted, the control signal including a positive phase voltage, an inverted voltage or a voltage level different from the predetermined voltage is output to a second control pin of the first output port. A device for detecting a different motherboard circuit according to the shared power supply and the display of claim 1 , wherein the second circuit includes a second input port electrically connected to the motherboard circuit, and an electrical connection a second output port of the display, and an electrostatic protection module bridged between the second input port and the second output port, the static protection module includes an input terminal for an interface control signal input, and a An over-positive pulse clutter of the interface control signal is pulled up and clamped to a first diode of a predetermined voltage, and a spike-negative pulse clutter signal of the interface control signal is pulled down and clamped to the ground. A second diode of voltage level. The device for detecting different motherboard circuits according to the shared power supply and the display according to claim 7 of the patent application, wherein the second circuit further comprises a voltage identification bridged between the second input port and the second output port The conversion module is configured to set and output an operating voltage that is consistent with a rated voltage required by the liquid crystal display. A device for detecting different motherboard circuits according to any one of claims 1 to 8 of the patent application, wherein the signal format conforms to a low voltage differential signal standard. The device for detecting different motherboard circuits according to any one of the first to eighth aspects of the patent application is for detecting a motherboard circuit used for a liquid crystal television. An adapter device that shares a power supply and a display to detect different motherboard circuits, including: a first circuit electrically connected between the power supply and a motherboard circuit to be detected, including an electric First connected to the power supply And a first output port electrically connected to the motherboard circuit for converting a predetermined power generated by the power supply to a power supply required for supplying a motherboard circuit of a different type; and a second circuit, Electrically connected between the motherboard circuit and the liquid crystal display, comprising a second input port electrically connected to the motherboard circuit and a second output port electrically connected to the liquid crystal display for the motherboard circuit The generated control signal converts a signal format required for the liquid crystal display to perform a test procedure; and a setting unit determines a first position or a second position by grounding or not, and passes through the motherboard circuit at the first position An internal power source supplies the liquid crystal display, and the liquid crystal display is supplied to the second position through an external power source that is not supplied by the motherboard circuit. The switching device of claim 11, wherein the first circuit further comprises a DC conversion and overvoltage protection module bridged between the first input port and the first output port, the DC The conversion and overvoltage protection module includes a DC conversion portion and an overvoltage protection portion, and the DC conversion portion converts the first voltage stored in the first input port into a second microprocessor that supplies the motherboard circuit The voltage, the overvoltage protection portion is to automatically turn off the power supply when the second voltage of the output is higher than a predetermined voltage to reduce the second voltage output to 0 volts. The switching device of claim 11, wherein the first circuit further comprises a first level converter and a plurality of electronic switches between the first input port and the first output port, The first output port has a first control pin that generates a power-on voltage level, and the first level converter is used to turn And switching the power-on voltage level of the first control pin and controlling the turning on or off of the electronic switches to output the voltage after the switching voltage level to the first output port. The switching device of claim 11, wherein the first circuit further comprises an automatic discharge module, wherein the automatic discharge module comprises a shutdown state recognition circuit, a multi-channel shared discharge electronic switch, and a number The discharge resistors are discharged by the discharge electronic switch and the discharge resistors when the shutdown state recognition circuit detects the shutdown. The switching device of claim 11, wherein the first circuit further comprises a second level converter, wherein the second level converter is configured to convert the predetermined voltage of the first input port, The output includes a positive phase voltage, an inverted voltage or a control signal different from the voltage level of the predetermined voltage to a second control pin of the first output port. The switching device of claim 11, wherein the second circuit comprises an electrostatic protection module bridged between the second input port and the second output port, the electrostatic protection module comprising An input terminal for an interface control signal input, a first diode for pulling up and clamping a high positive pulse clutter of the interface control signal to a predetermined voltage, and a first control signal for the interface A second diode that pulls down the pinch negative clutter signal and clamps to the ground voltage level. The switching device of claim 11, wherein the second circuit further comprises a voltage identification conversion module bridged between the second input port and the second output port, the voltage recognition conversion mode The set is used to set and output an operating voltage that is consistent with the rated voltage required by the liquid crystal display. An adapter device that shares a power supply and a display to detect different motherboard circuits, and the output voltage of the motherboard circuit is a first voltage or a second voltage, and the liquid crystal display needs the first voltage. The switching device includes a second input port for electrically connecting to the motherboard circuit; a second output port for electrically connecting to the liquid crystal display; and a voltage identification conversion module, the voltage recognition conversion module The method includes: a mainboard power input end receiving the first voltage or the second voltage from the second input port; an identification circuit that outputs a low level voltage and detects the second when detecting the first voltage a high-level voltage is output when the voltage is applied; a panel power output end is electrically connected to the second output port; and a reverse module is used to convert the high/low level voltage into a low/high level voltage; The first voltage switch is electrically connected between the identification circuit, the reverse module and the output end of the panel power supply, the input is a high level voltage is turned on, and the input low level voltage is turned off; the DC voltage conversion module Electrical Connected between the power input end of the motherboard and the power output end of the panel; a second voltage switch electrically connected between the identification circuit and the DC voltage conversion module, the input is a high level voltage is turned on, and the input is low The level voltage is turned off; and a setting unit is disposed between the first voltage switch and the second voltage switch, and is disposed at a first position where the output is high impedance, so that the motherboard power input terminal supplies the first When the voltage is applied, the output is converted by the identification circuit The low-level voltage is converted into a high-level voltage by the reverse module to drive the first voltage switch to be turned on, and the second voltage switch is not turned off without the low-level voltage of the reverse module, thereby passing The first voltage switch outputs the first voltage to the panel power output end; and when the output is in the second position of the ground, the motherboard power supply input terminal supplies the second voltage, and the output is converted by the identification circuit. a high-level voltage, the low-level voltage is turned on by the reverse module, driving the first voltage switch to be turned off, and the second voltage switch is not turned on without the high-level voltage of the reverse module, and then The DC voltage conversion module converts the first voltage output to the panel power output. The adapter device of claim 18, wherein the voltage identification conversion module further comprises: an external power input terminal electrically connected to the second input port for receiving a third voltage; An external switch electrically connected between the external power input end, the main board power input end and the panel power output end, the input is a high level voltage is turned on, and the input low level voltage is turned off; and the setting unit is turned off; The second voltage switch and the second voltage switch are both turned off, and the external switch is turned on to supply the third voltage to the panel power output.