Display panel circuit supporting Micro-HDMI signal input

Abstract

The utility model relates to a display panel circuit supporting Micro-HDMI signal input, which comprises a main control chip, a Micro-HDMI signal input module, an LVDS screen signal output module, an audio power amplifier module, a data read-write chip and a power supply module, the Micro-HDMI signal input module receives HDMI digital image signals, the output end of the Micro-HDMI signal input module is connected with the main control chip, and the output end of the Micro-HDMI signal input module is connected with the audio power amplifier module. The main control chip converts received HDMI digital image signals into analog signals corresponding to an LVDS screen and transmits the analog signals to the LVDS screen signal output module, the main control chip outputs audio signals to the audio power amplifier module, the output end of the audio power amplifier module is connected with the loudspeaker, the power module outputs power signals to the main control chip, and the power module outputs power signals to the main control chip. A pin 6 of the data read-write chip is connected with a pin 47 of the main control chip, and a pin 5 of the data read-write chip is connected with a pin 48 of the main control chip. And the display field of a large number of medical equipment is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a display board circuit supporting Micro-HDMI signal input. Background Art

[0002] The monitor controller combines an analog RGB input interface, an HDM11.4a digital input interface compatible with HDCP1.4, and a DP1.2 digital input interface compatible with HDCP1.4. The embedded single-chip microcomputer is based on the industrial standard 8051 core and is externally connected with a serial flash memory. It supports 4-channel digital input, with the speed of each channel reaching 1.6 Gbps and 2.7 Gbps, supports 10-bit Gamma programming, has a maximum resolution of 1920*1200P, and a maximum refresh rate of 75HZ. It is mainly used in industries such as the medical industry, including medical device equipment, industrial control computers for human-computer interaction, etc.; it can also be applied to other industries, such as monitors, all-in-ones, and embedded application devices.

[0003] Since traditional display products are mostly used in home monitors, office monitors, or commercial monitors, most of them adopt HDMI-A interfaces. Moreover, there are few solutions used in the medical industry. This has limited the medical industry and cannot meet the existing medical industry market. Summary of the Utility Model

[0004] The utility model provides a display board circuit supporting Micro-HDMI signal input, aiming to solve the problem that existing medical monitors do not support Micro-HDMI interface signal input.

[0005] The utility model provides a display board circuit supporting Micro-HDMI signal input, including a main control chip, a Micro-HDMI signal input module, an LVDS screen signal output module, an audio power amplifier module, a data reading and writing chip, and a power supply module. The Micro-HDMI signal input module receives HDMI digital image signals, and the output end of the Micro-HDMI signal input module is connected to the main control chip. The main control chip converts the received HDMI digital image signals into corresponding analog signals for the LVDS screen and transmits them to the LVDS screen signal output module. The main control chip outputs audio signals to the audio power amplifier module, and the output end of the audio power amplifier module is connected to a speaker. The power supply module outputs power signals to the main control chip. The 6th pin of the data reading and writing chip is connected to the 47th pin of the main control chip, and the 5th pin of the data reading and writing chip is connected to the 48th pin of the main control chip.

[0006] As a further improvement of the present utility model, the power supply module includes a power input interface JP1, a power supply chip U1, a power supply chip U2, and a power supply chip U3. The power input interface JP1 is connected to a 12V voltage. The power input interface JP1 is connected to a capacitor C3. The pin 1 of the power input interface JP1 is connected to one end of a fuse F1. The other end of the fuse F1 outputs a 12V voltage to the power supply chip U1, the power supply chip U2, and the power supply chip U3. The power supply chip U1 outputs a 5V voltage, the power supply chip U2 outputs a 3.3V voltage, and the power supply chip U3 outputs a 0.9V voltage.

[0007] As a further improvement of the present utility model, the power supply module further includes a backlight power control interface J4. The pins 1, 2, and 3 of the backlight power control interface J4 are connected to a 12V voltage. The pin 7 of the backlight power control interface J4 is connected to the collector of a triode Q1. The base of the triode Q1 is connected to the pin 123 of the main control chip. The pin 8 of the backlight power control interface J4 is connected to the pin 124 of the main control chip.

[0008] As a further improvement of the present utility model, the Micro-HDMI signal input module includes a signal input interface JP5, an anti-interference chip UX1, and an anti-interference chip UX2. The signal input interface JP5 is connected to an HDMI signal. The pin 9 of the signal input interface JP5 is connected to the pin 5 of the anti-interference chip UX1. The pin 6 of the anti-interference chip UX1 is connected to the pin 2 of the main control chip. The pin 11 of the signal input interface JP5 is connected to the pin 4 of the anti-interference chip UX1. The pin 7 of the anti-interference chip UX1 is connected to the pin 1 of the main control chip. The pin 12 of the signal input interface JP5 is connected to the pin 2 of the anti-interference chip UX1. The pin 9 of the anti-interference chip UX1 is connected to the pin 8 of the main control chip. The pin 14 of the signal input interface JP5 is connected to the pin 1 of the anti-interference chip UX1. The pin 10 of the anti-interference chip UX1 is connected to the pin 9 of the main control chip. The pin 3 of the signal input interface JP5 is connected to the pin 5 of the anti-interference chip UX2. The pin 6 of the anti-interference chip UX2 is connected to the pin 7 of the main control chip. The pin 5 of the signal input interface JP5 is connected to the pin 4 of the anti-interference chip UX2. The pin 7 of the anti-interference chip UX2 is connected to the pin 6 of the main control chip. The pin 6 of the signal input interface JP5 is connected to the pin 2 of the anti-interference chip UX2. The pin 9 of the anti-interference chip UX2 is connected to the pin 5 of the main control chip. The pin 8 of the signal input interface JP5 is connected to the pin 1 of the anti-interference chip UX2. The pin 10 of the anti-interference chip UX2 is connected to the pin 4 of the main control chip.

[0009] As a further improvement of the present utility model, the LVDS screen signal output module includes an LVDS screen signal output interface CN6. The 1st and 2nd pins of the LVDS screen signal output interface CN6 are connected to the drain of the field effect transistor Q2. The source of the field effect transistor Q2 is respectively connected to the 5V and 3.3V voltages. The gate of the field effect transistor Q2 is connected to the collector of the triode Q3. The base of the triode Q3 is connected to the 90th pin of the main control chip. The 88th pin of the main control chip is connected to the 5th pin of the LVDS screen signal output interface CN6. The 87th pin of the main control chip is connected to the 6th pin of the LVDS screen signal output interface CN6. The 86th pin of the main control chip is connected to the 8th pin of the LVDS screen signal output interface CN6. The 85th pin of the main control chip is connected to the 9th pin of the LVDS screen signal output interface CN6. The 84th pin of the main control chip is connected to the 11th pin of the LVDS screen signal output interface CN6. The 83rd pin of the main control chip is connected to the 12th pin of the LVDS screen signal output interface CN6. The 82nd pin of the main control chip is connected to the 14th pin of the LVDS screen signal output interface CN6. The 81st pin of the main control chip is connected to the 15th pin of the LVDS screen signal output interface CN6. The 80th pin of the main control chip is connected to the 19th pin of the LVDS screen signal output interface CN6. The 79th pin of the main control chip is connected to the 20th pin of the LVDS screen signal output interface CN6.

[0010] As a further improvement of the present utility model, the audio power amplifier module includes an audio power amplifier chip U4 and an audio output interface J6. The 6th pin of the audio power amplifier chip U4 is connected to the 58th pin of the main control chip. The 3rd pin of the audio power amplifier chip U4 is connected to the 59th pin of the main control chip. The 7th pin of the audio power amplifier chip U4 is connected to the collector of the triode Q3. The base of the triode Q3 is connected to the 34th pin of the main control chip. The 2nd pin of the audio power amplifier chip U4 is connected to the collector of the triode Q5. The base of the triode Q5 is connected to the 63rd pin of the main control chip. The 11th pin of the audio power amplifier chip U4 is connected to the 1st pin of the audio output interface J6. The 9th pin of the audio power amplifier chip U4 is connected to the 2nd pin of the audio output interface J6. The 14th pin of the audio power amplifier chip U4 is connected to the 4th pin of the audio output interface J6. The 16th pin of the audio power amplifier chip U4 is connected to the 3rd pin of the audio output interface J6.

[0011] As a further improvement of the present utility model, it further includes a Flash chip U6. The 3rd pin of the Flash chip U6 is connected to the 96th pin of the main control chip.

[0012] As a further improvement of the present utility model, it further includes a key control interface J3. The 1-pin of the key control interface J3 is connected to the 92-pin of the main control chip. The 2-pin of the key control interface J3 is connected to the 97-pin of the main control chip. The 3-pin of the key control interface J3 is connected to the 98-pin of the main control chip. The 4-pin of the key control interface J3 is connected to the 93-pin of the main control chip. The 5-pin of the key control interface J3 is connected to the 94-pin of the main control chip.

[0013] As a further improvement of the present utility model, it further includes a touch screen interface J2 and a touch screen interface J14. The 5-pin of the touch screen interface J2 is connected to the 1-pin of the touch screen interface J14. The 4-pin of the touch screen interface J2 is connected to the 2-pin of the touch screen interface J14. The 3-pin of the touch screen interface J2 is connected to the 3-pin of the touch screen interface J14. The 2-pin of the touch screen interface J2 is connected to the 4-pin of the touch screen interface J14. The 1-pin of the touch screen interface J2 is connected to the 5-pin of the touch screen interface J14.

[0014] As a further improvement of the present utility model, the model of the main control chip is RTD2525BR.

[0015] The beneficial effects of the present utility model are as follows: It is specifically aimed at the display field of medical devices, adopts the RTD2525BR chip, and is configured with a Micro-HDMI interface. The display is diversified, supporting LVDS / EDP display screens, and supporting various sizes of display screens such as 7 inches, 10.1 inches, 21 inches, etc.; the setting parameters are multifunctional, configured with 6 keys, supporting multi-language settings, and different function parameters can be set; the product is green and environmentally friendly, with ultra-low power consumption less than 0.3W during standby and sleep; it makes the display field in the medical industry more convenient. Description of the Drawings

[0016] Figure 1 It is a relationship diagram of each module in the circuit of the present utility model;

[0017] Figure 2 It is a specific circuit connection diagram of the main control chip of the present utility model;

[0018] Figure 3 It is a specific circuit connection diagram of the power supply module of the present utility model;

[0019] Figure 4 It is a specific circuit connection diagram of the Micro-HDMI signal input module of the present utility model;

[0020] Figure 5 It is a specific circuit connection diagram of the LVDS screen signal output module of the present utility model;

[0021] Figure 6 is the specific circuit connection diagram of the touch screen interface of the present utility model;

[0022] Figure 7 is the specific circuit connection diagram of the button control interface of the present utility model;

[0023] Figure 8 is the specific circuit connection diagram of the Flash chip of the present utility model;

[0024] Figure 9 is the specific circuit connection diagram of the audio power amplifier module of the present utility model. Detailed implementation manners

[0025] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] As Figures 1-9 shown, the present utility model provides a display board circuit supporting Micro-HDMI signal input, including a main control chip, a Micro-HDMI signal input module, an LVDS screen signal output module, an audio power amplifier module, a data reading and writing chip and a power supply module. The Micro-HDMI signal input module receives an HDMI digital image signal. The output end of the Micro-HDMI signal input module is connected to the main control chip. The main control chip converts the received HDMI digital image signal into an analog signal corresponding to the LVDS screen and transmits it to the LVDS screen signal output module. The main control chip outputs an audio signal to the audio power amplifier module. The output end of the audio power amplifier module is connected to a speaker. The power supply module outputs a power supply signal to the main control chip. The 6th pin of the data reading and writing chip is connected to the 47th pin of the main control chip, and the 5th pin of the data reading and writing chip is connected to the 48th pin of the main control chip.

[0027] As an embodiment of the present utility model, the power supply module includes a power supply input interface JP1, a power supply chip U1, a power supply chip U2 and a power supply chip U3. The power supply input interface JP1 accesses a 12V voltage. The power supply input interface JP1 is connected to a capacitor C3. The 1st pin of the power supply input interface JP1 is connected to one end of a fuse F1. The other end of the fuse F1 outputs a 12V voltage to the power supply chip U1, the power supply chip U2 and the power supply chip U3. The power supply chip U1 outputs a 5V voltage, the power supply chip U2 outputs a 3.3V voltage, and the power supply chip U3 outputs a 0.9V voltage.

[0028] As another embodiment of the present utility model, the power supply module further includes a backlight power control interface J4. The 1st, 2nd, and 3rd pins of the backlight power control interface J4 are connected to a 12V voltage. The 7th pin of the backlight power control interface J4 is connected to the collector of the triode Q1. The base of the triode Q1 is connected to the 123rd pin of the main control chip. The 8th pin of the backlight power control interface J4 is connected to the 124th pin of the main control chip.

[0029] As another embodiment of the present utility model, the Micro-HDMI signal input module includes a signal input interface JP5, an anti-interference chip UX1, and an anti-interference chip UX2. The signal input interface JP5 is connected to an HDMI signal. The 9th pin of the signal input interface JP5 is connected to the 5th pin of the anti-interference chip UX1. The 6th pin of the anti-interference chip UX1 is connected to the 2nd pin of the main control chip. The 11th pin of the signal input interface JP5 is connected to the 4th pin of the anti-interference chip UX1. The 7th pin of the anti-interference chip UX1 is connected to the 1st pin of the main control chip. The 12th pin of the signal input interface JP5 is connected to the 2nd pin of the anti-interference chip UX1. The 9th pin of the anti-interference chip UX1 is connected to the 8th pin of the main control chip. The 14th pin of the signal input interface JP5 is connected to the 1st pin of the anti-interference chip UX1. The 10th pin of the anti-interference chip UX1 is connected to the 9th pin of the main control chip. The 3rd pin of the signal input interface JP5 is connected to the 5th pin of the anti-interference chip UX2. The 6th pin of the anti-interference chip UX2 is connected to the 7th pin of the main control chip. The 5th pin of the signal input interface JP5 is connected to the 4th pin of the anti-interference chip UX2. The 7th pin of the anti-interference chip UX2 is connected to the 6th pin of the main control chip. The 6th pin of the signal input interface JP5 is connected to the 2nd pin of the anti-interference chip UX2. The 9th pin of the anti-interference chip UX2 is connected to the 5th pin of the main control chip. The 8th pin of the signal input interface JP5 is connected to the 1st pin of the anti-interference chip UX2. The 10th pin of the anti-interference chip UX2 is connected to the 4th pin of the main control chip.

[0030] As another embodiment of the present utility model, the LVDS screen signal output module includes an LVDS screen signal output interface CN6. Pins 1 and 2 of the LVDS screen signal output interface CN6 are connected to the drain of the field effect transistor Q2. The source of the field effect transistor Q2 is respectively connected to 5V and 3.3V voltages. The gate of the field effect transistor Q2 is connected to the collector of the triode Q3. The base of the triode Q3 is connected to pin 90 of the main control chip. Pin 88 of the main control chip is connected to pin 5 of the LVDS screen signal output interface CN6. Pin 87 of the main control chip is connected to pin 6 of the LVDS screen signal output interface CN6. Pin 86 of the main control chip is connected to pin 8 of the LVDS screen signal output interface CN6. Pin 85 of the main control chip is connected to pin 9 of the LVDS screen signal output interface CN6. Pin 84 of the main control chip is connected to pin 11 of the LVDS screen signal output interface CN6. Pin 83 of the main control chip is connected to pin 12 of the LVDS screen signal output interface CN6. Pin 82 of the main control chip is connected to pin 14 of the LVDS screen signal output interface CN6. Pin 81 of the main control chip is connected to pin 15 of the LVDS screen signal output interface CN6. Pin 80 of the main control chip is connected to pin 19 of the LVDS screen signal output interface CN6. Pin 79 of the main control chip is connected to pin 20 of the LVDS screen signal output interface CN6.

[0031] As another embodiment of the present utility model, the audio power amplifier module includes an audio power amplifier chip U4 and an audio output interface J6. Pin 6 of the audio power amplifier chip U4 is connected to pin 58 of the main control chip. Pin 3 of the audio power amplifier chip U4 is connected to pin 59 of the main control chip. Pin 7 of the audio power amplifier chip U4 is connected to the collector of the triode Q3. The base of the triode Q3 is connected to pin 34 of the main control chip. Pin 2 of the audio power amplifier chip U4 is connected to the collector of the triode Q5. The base of the triode Q5 is connected to pin 63 of the main control chip. Pin 11 of the audio power amplifier chip U4 is connected to pin 1 of the audio output interface J6. Pin 9 of the audio power amplifier chip U4 is connected to pin 2 of the audio output interface J6. Pin 14 of the audio power amplifier chip U4 is connected to pin 4 of the audio output interface J6. Pin 16 of the audio power amplifier chip U4 is connected to pin 3 of the audio output interface J6.

[0032] As another embodiment of the present utility model, it further includes a Flash chip U6. Pin 3 of the Flash chip U6 is connected to pin 96 of the main control chip.

[0033] As another embodiment of the present utility model, it further includes a key control interface J3. The 1-pin of the key control interface J3 is connected to the 92-pin of the main control chip, the 2-pin of the key control interface J3 is connected to the 97-pin of the main control chip, the 3-pin of the key control interface J3 is connected to the 98-pin of the main control chip, the 4-pin of the key control interface J3 is connected to the 93-pin of the main control chip, and the 5-pin of the key control interface J3 is connected to the 94-pin of the main control chip.

[0034] As another embodiment of the present utility model, it further includes a touch screen interface J2 and a touch screen interface J14. The 5-pin of the touch screen interface J2 is connected to the 1-pin of the touch screen interface J14, the 4-pin of the touch screen interface J2 is connected to the 2-pin of the touch screen interface J14, the 3-pin of the touch screen interface J2 is connected to the 3-pin of the touch screen interface J14, the 2-pin of the touch screen interface J2 is connected to the 4-pin of the touch screen interface J14, and the 1-pin of the touch screen interface J2 is connected to the 5-pin of the touch screen interface J14.

[0035] As another embodiment of the present utility model, the model of the main control chip is RTD2525BR.

[0036] The present utility model provides a display board circuit supporting Micro-HDMI signal input, which is specifically for the display field of medical devices, adopts an RTD2525BR chip, and is configured with a Micro-HDMI interface. It has diverse displays, supports LVDS / EDP display screens, supports display screens of various sizes such as 7 inches, 10.1 inches, 21 inches, etc.; the setting parameters are multifunctional, configured with 6 keys, support multi-language settings (Chinese, English, German, Japanese, etc.), and can set different function parameters; the product is green and environmentally friendly, with ultra-low power consumption less than 0.3W when in standby and sleep states, making the display field in the medical industry more convenient.

[0037] In the instruction manual appendix Figures 2-9 The meanings of each component are as follows: J1 is the power input interface; U1, U2, and U3 are power chips; J4 is the display screen backlight interface; JP5 is the Micro-HDMI signal input interface; CN6 is the LVDS screen signal output interface; U10 is the main control chip RTD2525BR; U6 is the Flash data storage chip; U5 is the data read / write chip; J2 and J14 are touch screen interfaces; U4 is the audio power amplifier chip; J6 is the speaker output interface, and J3 is the external key control interface.

[0038] Power supply section: The power input interface J1 is a 12V power input interface. It is filtered by the capacitor C3 and then flows to the fuse F1, and then through the filtering capacitors C2 and C78 to provide a stable 12V power supply, which then flows to the power chips U1, U2, U3 and the backlight power control interface J4.

[0039] The power chip U1 is a voltage regulator chip that outputs 5V. After being filtered by C4, C6, and C7, it provides a stable power supply to the audio power amplifier chip U4 and the backlight power control interface J4. The power chip U2 is a voltage regulator chip that outputs 3.3V. After being filtered by C9, C11, and C12, it provides a stable power supply to the main control chip U10, the LVDS screen signal output interface CN6, the Flash chip U6, and the data read / write chip U5. The power chip U3 is a voltage regulator chip that outputs 0.9V. After being filtered by C17, C19, and C20, it provides a stable power supply to the main control chip U10. The main control chip U10 provides a BL-ADJ control signal that flows to the triode Q1. After being switched and amplified by the triode Q1, it flows to the backlight power control interface J4. The main control chip U10 provides a BL_EN data control signal to the backlight power control interface J4. 12V is filtered by L3, C13, and C14 and then fed to the backlight power control interface J4.

[0040] The external device outputs an HDMI digital image signal, which is connected to the signal input interface JP5 through a cable. The HDMI digital image signal flows through the PCB wire to the RTD2525BR main chip, passes through the anti-interference chips UX1 and UX2 and the anti-interference ESD devices, and then after being decoded and analyzed by the main control chip, it outputs an analog signal, which flows to the LVDS screen signal output interface CN6 and is then transmitted to the LVDS display screen.

[0041] The main control chip U10 converts the received HDMI digital image signal into an analog signal corresponding to the LVDS screen and transmits it to the LVDS display screen through a ribbon cable. The main control chip U10 outputs a screen voltage control signal, which flows to the switching triode Q3. The triode Q3 controls the on and off of the field effect transistor Q2, and the field effect transistor Q2 controls the opening or closing of the screen voltage.

[0042] The 3.3V voltage of the main control chip is supplied through L13, L15, L17, L20, L14, L22; the 0.9V of the main control chip is supplied through L16, L19; the two groups of voltages of 3.3V and 0.9V supply power to the data read / write chip U5 and the Flash chip U6 at the same time. When switching, the main control chip RTD2525BR communicates with the data read / write chip U5 through the I2C communication protocol to read data information. At the same time, RTD2525BR communicates with the Flash chip U6 through the SPI communication protocol to read data information.

[0043] The button control interface is J3. The button commands provide corresponding level signals through RP3 and RP2 and are input into the main control chip U10. The main control chip U10 decodes internally and then outputs a control signal to achieve the function.

[0044] This design expands the placement positions of the touch controllers on the touch screen. The touch screen interfaces J2 and J14 are for the touch controllers.

[0045] The power supply chip U1 outputs 5V. Through L8 and after filtering by C57 and C58, it is input into the audio power amplifier chip U4. The main control chip U10 outputs an audio analog signal, which flows through R75 and R76, then to the coupling capacitors C55 and C56 and then to the audio power amplifier chip U4. It is amplified by the audio power amplifier chip U4 and output to the audio output interface J6. The main control chip U10 outputs a control signal to flow to the triode Q4, and the sound volume of the power amplifier is controlled through the triode Q4. The main control chip U10 outputs a control signal to flow to the triode Q5, and the operation and shutdown (MUTE terminal) of the power amplifier are controlled through the triode Q5.

[0046] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model pertains, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. A display panel circuit supporting Micro-HDMI signal input, characterized in that: It includes a main control chip, a Micro-HDMI signal input module, an LVDS screen signal output module, an audio power amplifier module, a data read-write chip and a power module. The Micro-HDMI signal input module receives an HDMI digital image signal. The output end of the Micro-HDMI signal input module is connected to the main control chip. The main control chip converts the received HDMI digital image signal into an analog signal corresponding to the LVDS screen and transmits it to the LVDS screen signal output module. The main control chip outputs an audio signal to the audio power amplifier module. The output end of the audio power amplifier module is connected to a speaker. The power module outputs a power signal to the main control chip. Pin 6 of the data read-write chip is connected to pin 47 of the main control chip, and pin 5 of the data read-write chip is connected to pin 48 of the main control chip.

2. The display panel circuit supporting Micro-HDMI signal input according to claim 1, characterized in that: The power module includes a power input interface JP1, a power chip U1, a power chip U2 and a power chip U3. The power input interface JP1 is connected to a 12V voltage. The power input interface JP1 is connected to a capacitor C3. Pin 1 of the power input interface JP1 is connected to one end of a fuse F1. The other end of the fuse F1 outputs a 12V voltage to the power chip U1, the power chip U2 and the power chip U3. The power chip U1 outputs a 5V voltage, the power chip U2 outputs a 3.3V voltage, and the power chip U3 outputs a 0.9V voltage.

3. The display panel circuit supporting Micro-HDMI signal input according to claim 2, characterized in that: The power module also includes a backlight power control interface J4, pins 1, 2, and 3 of the backlight power control interface J4 are connected to a 12V voltage, pin 7 of the backlight power control interface J4 is connected to the collector of the transistor Q1, the base of the transistor Q1 is connected to pin 123 of the main control chip, and pin 8 of the backlight power control interface J4 is connected to pin 124 of the main control chip.

4. The display panel circuit supporting Micro-HDMI signal input according to claim 1, characterized in that: The Micro-HDMI signal input module includes a signal input interface JP5, an anti-interference chip UX1 and an anti-interference chip UX2. The signal input interface JP5 is connected to an HDMI signal. Pin 9 of the signal input interface JP5 is connected to pin 5 of the anti-interference chip UX1. Pin 6 of the anti-interference chip UX1 is connected to pin 2 of the main control chip. Pin 11 of the signal input interface JP5 is connected to pin 4 of the anti-interference chip UX1. Pin 7 of the anti-interference chip UX1 is connected to pin 1 of the main control chip. Pin 12 of the signal input interface JP5 is connected to pin 2 of the anti-interference chip UX1. Pin 9 of the anti-interference chip UX1 is connected to pin 8 of the main control chip. Pin 14 of the signal input interface JP5 is connected to pin 1 of the anti-interference chip UX1. The 10th pin of the anti-interference chip UX1 is connected to the 9th pin of the main control chip, the 3rd pin of the signal input interface JP5 is connected to the 5th pin of the anti-interference chip UX2, the 6th pin of the anti-interference chip UX2 is connected to the 7th pin of the main control chip, the 5th pin of the signal input interface JP5 is connected to the 4th pin of the anti-interference chip UX2, the 7th pin of the anti-interference chip UX2 is connected to the 6th pin of the main control chip, the 6th pin of the signal input interface JP5 is connected to the 2nd pin of the anti-interference chip UX2, the 9th pin of the anti-interference chip UX2 is connected to the 5th pin of the main control chip, the 8th pin of the signal input interface JP5 is connected to the 1st pin of the anti-interference chip UX2, and the 10th pin of the anti-interference chip UX2 is connected to the 4th pin of the main control chip.

5. The display panel circuit supporting Micro-HDMI signal input according to claim 1, characterized in that: The LVDS screen signal output module includes an LVDS screen signal output interface CN6, wherein the 1st and 2nd pins of the LVDS screen signal output interface CN6 are connected to the drain of the field effect tube Q2, the source of the field effect tube Q2 is respectively connected to the 5V and 3.3V voltages, the gate of the field effect tube Q2 is connected to the collector of the transistor Q3, the base of the transistor Q3 is connected to the 90th pin of the main control chip, the 88th pin of the main control chip is connected to the 5th pin of the LVDS screen signal output interface CN6, the 87th pin of the main control chip is connected to the 6th pin of the LVDS screen signal output interface CN6, the 86th pin of the main control chip is connected to the 8th pin of the LVDS screen signal output interface CN6, and the main control Pin 85 of the chip is connected to pin 9 of the LVDS screen signal output interface CN6, pin 84 of the main control chip is connected to pin 11 of the LVDS screen signal output interface CN6, pin 83 of the main control chip is connected to pin 12 of the LVDS screen signal output interface CN6, pin 82 of the main control chip is connected to pin 14 of the LVDS screen signal output interface CN6, pin 81 of the main control chip is connected to pin 15 of the LVDS screen signal output interface CN6, pin 80 of the main control chip is connected to pin 19 of the LVDS screen signal output interface CN6, and pin 79 of the main control chip is connected to pin 20 of the LVDS screen signal output interface CN6.

6. The display panel circuit supporting Micro-HDMI signal input according to claim 1, characterized in that: The audio power amplifier module includes an audio power amplifier chip U4 and an audio output interface J6, wherein pin 6 of the audio power amplifier chip U4 is connected to pin 58 of the main control chip, pin 3 of the audio power amplifier chip U4 is connected to pin 59 of the main control chip, pin 7 of the audio power amplifier chip U4 is connected to the collector of the transistor Q3, the base of the transistor Q3 is connected to pin 34 of the main control chip, pin 2 of the audio power amplifier chip U4 is connected to the collector of the transistor Q5, the base of the transistor Q5 is connected to pin 63 of the main control chip, pin 11 of the audio power amplifier chip U4 is connected to pin 1 of the audio output interface J6, pin 9 of the audio power amplifier chip U4 is connected to pin 2 of the audio output interface J6, pin 14 of the audio power amplifier chip U4 is connected to pin 4 of the audio output interface J6, and pin 16 of the audio power amplifier chip U4 is connected to pin 3 of the audio output interface J6.

7. The display panel circuit supporting Micro-HDMI signal input according to claim 1, characterized in that: It also includes a Flash chip U6, and the 3rd pin of the Flash chip U6 is connected to the 96th pin of the main control chip.

8. The display panel circuit supporting Micro-HDMI signal input according to claim 1, characterized in that: It also includes a key control interface J3, wherein pin 1 of the key control interface J3 is connected to pin 92 of the main control chip, pin 2 of the key control interface J3 is connected to pin 97 of the main control chip, pin 3 of the key control interface J3 is connected to pin 98 of the main control chip, pin 4 of the key control interface J3 is connected to pin 93 of the main control chip, and pin 5 of the key control interface J3 is connected to pin 94 of the main control chip.

9. The display panel circuit supporting Micro-HDMI signal input according to claim 1, characterized in that: It also includes a touch screen interface J2 and a touch screen interface J14, wherein pin 5 of the touch screen interface J2 is connected to pin 1 of the touch screen interface J14, pin 4 of the touch screen interface J2 is connected to pin 2 of the touch screen interface J14, pin 3 of the touch screen interface J2 is connected to pin 3 of the touch screen interface J14, pin 2 of the touch screen interface J2 is connected to pin 4 of the touch screen interface J14, and pin 1 of the touch screen interface J2 is connected to pin 5 of the touch screen interface J14.

10. The display panel circuit supporting Micro-HDMI signal input according to claim 1, characterized in that: The model of the main control chip is RTD2525BR.

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