CN209947406U - Vehicle-mounted LVDS (Low Voltage differential Signaling) interface LCD (liquid Crystal display) self-adaptive application device - Google Patents
Vehicle-mounted LVDS (Low Voltage differential Signaling) interface LCD (liquid Crystal display) self-adaptive application device Download PDFInfo
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- CN209947406U CN209947406U CN201920776882.9U CN201920776882U CN209947406U CN 209947406 U CN209947406 U CN 209947406U CN 201920776882 U CN201920776882 U CN 201920776882U CN 209947406 U CN209947406 U CN 209947406U
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Abstract
The utility model relates to an on-vehicle LVDS interface LCD self-adaptation application device, including LCD display module, CPU module, MCU module and power module. The power supply module comprises a DC-DC boost IC module, and the LCD display module is provided with an LVDS interface and a touch control AVDD/VCOM. The LCD display module is connected with the CPU module and the DC-DC boost IC module through LVDS interfaces respectively, the DC-DC boost IC module outputs adjustable voltage to provide the LCD display module with required voltage, and the DC-DC boost IC module receives a voltage adjusting signal of the MCU module to adjust the output voltage value. The CPU module and the MCU module are in bidirectional communication through a serial port, and the touch control AVDD/VCOM is used for respectively adjusting the values of AVDD voltage and VCOM voltage of the LCD display module so as to adjust the display effect of the LCD. Through the design of matching software and hardware, the software control is directly adjusted to adjust the voltage required by the LCD display module, and the resistor does not need to be manually adjusted.
Description
Technical Field
The utility model relates to a LVDS interface technical field, concretely relates to on-vehicle LVDS interface LCD self-adaptation application device.
Background
At present, LVDS (Low Voltage differential Signaling) interface LCDs of different sizes of various manufacturers or a single manufacturer are used on a vehicle machine, only one voltage parameter corresponds to one LCD, and the biggest defect of the LVDS interface LCD is that other manufacturers which can not directly use a unified interface or the LCDs of different sizes of the same manufacturer are troublesome to produce and stock and cumbersome to produce, and the LCDs are manually matched through an adjustable resistor.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide an LCD adaptive application device with a vehicle LVDS interface, which is simple and fast by adjusting the voltage input value required by the LCD through software.
A vehicle-mounted LVDS interface LCD self-adaptive application device comprises an LCD display module, a CPU module, an MCU module and a power module, wherein the power module comprises a DC-DC boost IC module, the LCD display module is provided with an LVDS interface and a touch control AVDD/VCOM, the LCD display module is respectively connected with the CPU module and the DC-DC boost IC module through the LVDS interface, the DC-DC boost IC module is used for providing required voltage for the LCD display module, the voltage output by the DC-DC boost IC module is adjustable voltage, and the DC-DC boost IC module receives a voltage adjusting signal from the MCU module to adjust the output value of the voltage; the CPU module and the MCU module are in bidirectional communication through a serial port, and the touch control AVDD/VCOM is used for respectively adjusting the values of AVDD voltage and VCOM voltage of the LCD display module so as to adjust the display effect of the LCD.
Preferably, the voltage adjusting signal is a PWM signal, the PWM signal includes an MCU-PWM-AVDD voltage signal and an MCU-PWM-VCOM voltage signal, and the MCU module controls the duty ratio and the switching time of the MCU-PWM-AVDD voltage signal and the MCU-PWM-VCOM voltage signal respectively or simultaneously to satisfy the normal display of the LCD display module in various states.
Preferably, the power module further includes a DC-LDO conversion module, the DC-LDO conversion module is connected to the CPU module, the MCU module, and the DC-DC boost IC module, respectively, and the DC-LDO conversion module is configured to convert an external voltage and provide the CPU module, the MCU module, and the DC-DC boost IC module with a required voltage, respectively.
Preferably, the LCD display module is further provided with a touch secondary display interface for displaying AVDD voltage and VCOM voltage values.
Preferably, the DC-DC boost IC module has a plurality of resistors, capacitors, and diodes, and the values of the resistors, capacitors, and diodes are adjusted to change the values of the AVDD voltage and the VCOM voltage.
Preferably, the DC-DC boost IC module has a DC-DC chip having 6 pins, which are pins 1 to 6, respectively.
Preferably, a circuit used for adjusting the AVDD voltage in the touch control AVDD/VCOM is a circuit formed by three resistors connected in parallel with the 3 rd pin, the three resistors are respectively a first resistor, a second resistor and a third resistor, the third resistor is connected to a fourth resistor and a first capacitor connected in parallel, an AVDD voltage output interface is connected outside the first resistor, the fourth resistor outputs an MCU-PWM-AVDD voltage signal, and the duty ratio of the MCU-PWM-AVDD voltage signal is adjusted by adjusting the first resistor, the second resistor, the third resistor, the fourth resistor and the first capacitor to control an output value of the AVDD voltage.
Preferably, the circuit for adjusting the VCOM voltage in the touch control AVDD/VCOM is a circuit formed by a sixth resistor, a second capacitor, a seventh resistor, and a third capacitor connected in parallel to a fifth resistor, where the sixth resistor is connected in series with a diode, the diode outputs an MCU-PWM-VCOM voltage signal, and the fifth resistor, the sixth resistor, and the seventh resistor are adjusted to adjust the duty ratio of the MCU-PWM-VCOM voltage signal to control the output value of the VCOM voltage.
Preferably, the CPU module adopts an AC3561 chip.
In the vehicle-mounted LVDS interface LCD self-adaptive application device, the LCD display module is provided with an LVDS interface connected with the CPU module and the DC-DC boost IC module, the CPU module controls the LCD display module, the DC-DC boost IC module provides required voltage for the LCD display module, and the LCD display module is also provided with a touch control AVDD/VCOM for adjusting the values of the AVDD voltage and the VCOM voltage to the values required by the normal work of the LCD display module; the CPU module and the MCU module are in bidirectional communication through a serial port, the CPU module controls the MCU module to work, and the MCU module feeds back the working condition to the CPU module. The vehicle-mounted LVDS interface LCD self-adaptive application device is provided with touch controls AVDD/VCOM to adjust the value of AVDD voltage/VCOM voltage, achieves the purpose of adjusting the display effect of all LCDs with the same LVDS interface in a visual interface soft control mode, is plug-and-play, does not need to be matched with each LCD display module through a manual resistance adjustment, and is simple and convenient to use, flexible in design, compact in structure and wide in application prospect.
Drawings
Fig. 1 is a schematic block diagram of an on-vehicle LVDS interface LCD adaptive application device according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an MCU module chip interface of the vehicle-mounted LVDS interface LCD adaptive application device according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a local hardware circuit for adjusting the AVDD voltage value by the DC-DC boost IC module of the vehicle-mounted LVDS interface LCD adaptive application device according to the embodiment of the present invention.
Fig. 4 is a schematic diagram of a local hardware circuit for adjusting the VCOM voltage value by the DC-DC boost IC module of the vehicle-mounted LVDS interface LCD adaptive application device according to the embodiment of the present invention.
Fig. 5 is a schematic diagram of the touch control AVDD/VCOM adjusting AVDD/VCOM voltage value of the vehicle-mounted LVDS interface LCD adaptive application device according to the embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments and drawings.
Please refer to fig. 1, which illustrates an embodiment of the present invention relates to an on-vehicle LVDS interface LCD adaptive application device, which includes an LCD display module 1, a CPU module 2, an MCU module 3 and a power module, the power module includes a DC-DC boost IC module 41, the LCD display module 1 has an LVDS interface 11 and a touch control AVDD/VCOM12, the LCD display module 1 is connected to the CPU module 2 and the DC-DC boost IC module 41 respectively through the LVDS interface 11, the DC-DC boost IC module 41 is used for providing the LCD display module 1 with a required voltage, and an output voltage of the DC-DC boost IC module 41 is an adjustable voltage. The CPU module 2 and the MCU module 3 perform bidirectional communication via a serial port, the DC-DC boost IC module 41 receives a voltage adjustment signal from the MCU module 3 to adjust an output value of a voltage, and adjusts the touch control AVDD/VCOM12 to adjust values of an AVDD voltage and a VCOM voltage of the LCD display module 1, respectively, so that the LCD module 1 can achieve a normal display effect.
Preferably, the touch control AVDD/VCOM12 is adjusted to adjust the values of the AVDD voltage and the VCOM voltage, the LVDS interface 11 receives the data information adjusted by the touch control AVDD/VCOM12 and transmits the data information to the CPU module 2, the CPU module 2 transmits the received information of the adjusted data to the MCU module 3 in a serial port manner, and the MCU module 3 adjusts the voltage adjustment signal parameters to adjust the values of the AVDD voltage and the VCOM voltage output by the DC-DC boost IC module. Further, the voltage adjusting signal is a PWM signal, the PWM signal includes a first PWM signal 31 and a second PWM signal 32, the first PWM signal 31 is an MCU-PWM-AVDD voltage signal, the second PWM signal 32 is an MCU-PWM-VCOM voltage signal, and the MCU module 3 controls the duty ratio and the switching time of the MCU-PWM-AVDD voltage signal and the MCU-PWM-VCOM voltage signal respectively or simultaneously to satisfy the normal display of the LCD display module 1 in various states, where the states include the processes of turning on, ACC OFF, powering OFF, sleep wakeup, and the like of the LCD.
Preferably, the power module further includes a DC-LDO conversion module 42, the DC-LDO conversion module 42 is connected to the CPU module 2, the MCU module 3, and the DC-DC boost IC module 41, respectively, and the DC-LDO conversion module 42 is configured to convert an external voltage and provide a required voltage for the CPU module 2, the MCU module 3, and the DC-DC boost IC module 41, respectively.
Referring to fig. 5, the LCD display module 1 is further provided with a touch secondary display interface 13, the touch secondary display interface 13 pops up by touching the touch control AVDD/VCOM12, and the output of the AVDD voltage and the VCOM voltage is designed to be in an adjustable range by touching the touch control AVDD/VCOM12 and the sliding bar 131 under the touch secondary display interface 13, so as to meet different voltage requirements of all the LCD display modules 1. Preferably, the touch secondary display interface 13 is a floating frame displayed at any position of the interface of the LCD display module 1, so as to facilitate adjustment of the display effect, and after the effect is adjusted, the closing button is clicked to close the floating frame.
Referring to fig. 1-4, the MCU module 3 is shown adjusting the AVDD voltage value 411 and the VCOM voltage value 412 that control the LCD module 1 by adjusting the PWM signal. Preferably, the MCU chip 31 of the MCU module 3 meets the design requirements of other functions, such as sleep and sleep wake-up functions, system reset function, and power-on ignition function. Preferably, the DC-DC boost IC module 41 has a plurality of resistors, capacitors, and diodes, the values of which are adjusted to change the values of the AVDD voltage and the VCOM voltage.
Preferably, the DC-DC boost IC module 41 has a DC-DC chip 412, and the DC-DC chip 412 has 6 pins, which are pins 1 to 6.
Preferably, a circuit used for adjusting the AVDD voltage in the touch control AVDD/VCOM12 is a circuit formed by three resistors connected in parallel with the 3 rd pin, the three resistors are respectively a first resistor, a second resistor and a third resistor, the third resistor is connected to a fourth resistor and a first capacitor connected in parallel, the first resistor is externally connected with an AVDD voltage output interface, the fourth resistor outputs an MCU-PWM-AVDD voltage signal, and the duty ratio of the MCU-PWM-AVDD voltage signal is adjusted by adjusting the first resistor, the second resistor, the third resistor, the fourth resistor and the first capacitor to control an output value of the AVDD voltage. In the embodiment of the present invention, the first resistor is R1020, the second resistor is R1028, the third resistor is R1030, the fourth resistor is R1374, and the first capacitor is C1231. Further, in the embodiment of the present invention, R1020 is 150k Ω, R1028 is 11k Ω, R1030 is 15k Ω, R1374 is 15k Ω, and C1231 is a value that is feasible after multiple adjustments, and can be directly introduced and used.
Preferably, the circuit for adjusting the VCOM voltage in the touch control AVDD/VCOM12 is a circuit formed by a sixth resistor, a second capacitor, a seventh resistor and a third capacitor connected in parallel with a fifth resistor, the sixth resistor is connected in series with a diode, the diode outputs an MCU-PWM-VCOM voltage signal, and the duty ratio of the MCU-PWM-VCOM voltage signal is adjusted by adjusting the fifth resistor, the sixth resistor and the seventh resistor to control the output value of the VCOM voltage. Further, in the embodiment of the present invention, the fifth resistor is R1255, the sixth resistor is R1256, and the seventh resistor is R0131. Further, in the embodiment of the present invention, R1255 ═ 2.2k Ω, R1256 ═ 11k Ω, and R0131 ═ 860 Ω are possible values after multiple adjustments, and can be directly introduced into use.
Preferably, the voltage module is packaged by adopting a universal SOT23-6 so as to facilitate model selection; the CPU module adopts a Jie's science and technology main control AC3561 chip corresponding to the special chip of the car machine so as to be convenient for being adapted to various car types.
For the LCD display module with LVDS interface, due to the difference between the glass and the driving IC, the difference between the AVDD voltage and the VCOM voltage directly affects the display effect besides the predetermined feasible LVDS signal and the stable 3.3V.
According to the vehicle-mounted LVDS interface LCD self-adaptive application device, the values of AVDD voltage and VCOM voltage on the sliding bar 131 of the LCD display module 1 are changed through the design of hardware matching and software linkage, so that the requirements of different manufacturers and the same manufacturer for different sizes of LCD modules with different required voltages are met, and the resistors do not need to be adjusted manually; the manufacturer is convenient to stock, and the problem that display modules of different manufacturers are not matched is not considered; the assembly is simple and convenient, the production efficiency is greatly improved, and the production element cost is reduced; the intelligent vehicle-mounted rearview mirror monitoring navigation system is widely applied to the fields of vehicle machines (front and rear loading), intelligent vehicle-mounted rearview mirror monitoring navigation products, ministerial machines, two-passenger and one-dangerous products, tablet computers and the like.
It should be noted that the present invention is not limited to the above embodiments, and other changes can be made by those skilled in the art according to the spirit of the present invention, and all the changes made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (9)
1. The LCD self-adaptive application device with the vehicle-mounted LVDS interface is characterized by comprising an LCD display module, a CPU module, an MCU module and a power module, wherein the power module comprises a DC-DC boost IC module, the LCD display module is provided with an LVDS interface and a touch control AVDD/VCOM which are electrically connected, the LCD display module is connected with the CPU module and the DC-DC boost IC module through the LVDS interface respectively, the DC-DC boost IC module is used for providing required voltage for the LCD display module, the voltage output by the DC-DC boost IC module is adjustable voltage, and the DC-DC boost IC module receives a voltage adjusting signal from the MCU module to adjust the output voltage value; the CPU module and the MCU module are in bidirectional communication through a serial port, and the touch control AVDD/VCOM is used for respectively adjusting the values of AVDD voltage and VCOM voltage of the LCD display module so as to adjust the display effect of the LCD.
2. The on-vehicle LVDS interface LCD adaptive application device of claim 1, wherein the voltage adjusting signal is a PWM signal, the PWM signal comprises a MCU-PWM-AVDD voltage signal and a MCU-PWM-VCOM voltage signal, and the MCU module controls the duty ratio and the switching time of the MCU-PWM-AVDD voltage signal and the MCU-PWM-VCOM voltage signal respectively or simultaneously to satisfy the normal display of the LCD display module in various states.
3. The on-vehicle LVDS interface LCD adaptive application device according to claim 1, wherein the power module further comprises a DC-LDO conversion module, the DC-LDO conversion module is connected to the CPU module, the MCU module and the DC-DC boost IC module respectively, the DC-LDO conversion module is configured to convert an external voltage and provide the CPU module, the MCU module and the DC-DC boost IC module with a required voltage respectively.
4. The on-vehicle LVDS interface LCD adaptive application device according to claim 1, wherein the LCD display module is further provided with a touch secondary display interface for displaying AVDD voltage and VCOM voltage values.
5. The on-board LVDS interface LCD adaptive application device according to claim 1, wherein the DC-DC boost IC module has a plurality of resistors, capacitors and diodes whose values are adjusted to change the values of the AVDD voltage and the VCOM voltage.
6. The on-board LVDS interface LCD adaptive application device according to claim 5, wherein the DC-DC boost IC module has a DC-DC chip with 6 pins, 1 st to 6 th pins respectively.
7. The on-vehicle LVDS interface LCD adaptive application device according to claim 6, wherein a circuit for adjusting the AVDD voltage in the touch control AVDD/VCOM is a circuit formed by three resistors connected in parallel to the 3 rd pin, the three resistors are respectively a first resistor, a second resistor and a third resistor, the third resistor is connected to a fourth resistor and a first capacitor connected in parallel, the first resistor is externally connected with an AVDD voltage output interface, the fourth resistor outputs an MCU-PWM-AVDD voltage signal, and the duty ratio of the MCU-PWM-AVDD voltage signal is adjusted by adjusting the first resistor, the second resistor, the third resistor, the fourth resistor and the first capacitor to control an output value of the AVDD voltage.
8. The on-vehicle LVDS interface LCD adaptive application device according to claim 7, wherein the circuit for adjusting the VCOM voltage in the touch control AVDD/VCOM is a circuit formed by a sixth resistor, a second capacitor, a seventh resistor and a third capacitor connected in parallel with a fifth resistor, the sixth resistor is connected in series with a diode, the diode outputs an MCU-PWM-VCOM voltage signal, and the fifth resistor, the sixth resistor and the seventh resistor are adjusted to adjust a duty ratio of the MCU-PWM-VCOM voltage signal to control an output value of the VCOM voltage.
9. The on-vehicle LVDS interface LCD adaptive application device according to claim 1, wherein the CPU module employs an AC3561 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920776882.9U CN209947406U (en) | 2019-05-27 | 2019-05-27 | Vehicle-mounted LVDS (Low Voltage differential Signaling) interface LCD (liquid Crystal display) self-adaptive application device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920776882.9U CN209947406U (en) | 2019-05-27 | 2019-05-27 | Vehicle-mounted LVDS (Low Voltage differential Signaling) interface LCD (liquid Crystal display) self-adaptive application device |
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| Publication Number | Publication Date |
|---|---|
| CN209947406U true CN209947406U (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920776882.9U Expired - Fee Related CN209947406U (en) | 2019-05-27 | 2019-05-27 | Vehicle-mounted LVDS (Low Voltage differential Signaling) interface LCD (liquid Crystal display) self-adaptive application device |
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|---|---|
| CN (1) | CN209947406U (en) |
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- 2019-05-27 CN CN201920776882.9U patent/CN209947406U/en not_active Expired - Fee Related
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Granted publication date: 20200114 Termination date: 20210527 |