CN110136671B - LCD self-adaptive application device with vehicle-mounted LVDS interface - Google Patents
LCD self-adaptive application device with vehicle-mounted LVDS interface Download PDFInfo
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- CN110136671B CN110136671B CN201910447144.4A CN201910447144A CN110136671B CN 110136671 B CN110136671 B CN 110136671B CN 201910447144 A CN201910447144 A CN 201910447144A CN 110136671 B CN110136671 B CN 110136671B
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- 230000000694 effects Effects 0.000 claims abstract description 7
- 230000007175 bidirectional communication Effects 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 17
- 230000003044 adaptive effect Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000007667 floating Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000007958 sleep Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000005059 dormancy Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 230000002618 waking effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2370/00—Aspects of data communication
- G09G2370/14—Use of low voltage differential signaling [LVDS] for display data communication
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention relates to a vehicle-mounted LVDS interface LCD self-adaptive application device, which comprises an LCD display module, a CPU module, an MCU module and a power supply 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 required voltage for the LCD display module, and the DC-DC boost IC module receives a voltage regulation signal of the MCU module to regulate the output voltage value. The CPU module and the MCU module are in bidirectional communication through serial ports, and the touch control AVDD/VCOM is used for respectively adjusting the AVDD voltage and the VCOM voltage of the LCD display module so as to adjust the display effect of the LCD. Through the cooperation design of software and hardware, the software control is directly adjusted to adjust the voltage required by the LCD display module, and the resistor is not required to be manually adjusted.
Description
Technical Field
The invention relates to the technical field of LVDS interfaces, in particular to a vehicle-mounted LVDS interface LCD self-adaptive application device.
Background
At present, different-size LVDS interfaces of various factories or single factories are used on a vehicle machine, only one voltage parameter corresponds to one LCD, and the biggest defect is that other manufacturers with uniform interfaces or LCDs with different sizes of the same manufacturer cannot be directly used, production and stock are troublesome, production is complicated, and each LCD needs to be manually adapted through an adjustable resistor.
Disclosure of Invention
In view of this, it is necessary to provide a vehicle-mounted LVDS interface LCD adaptive application device, which is simple and fast to adjust the voltage input value required by the LCD through software.
The LCD self-adaptive application device comprises an LCD display module, a CPU module, an MCU module and a power supply module, wherein the power supply 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 adjustment 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 serial ports, and the touch control AVDD/VCOM is used for respectively adjusting the AVDD voltage and the VCOM voltage of the LCD display module so as to adjust the display effect of the LCD.
Preferably, the voltage regulating 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, so as to satisfy the normal display of the LCD display module in various states.
Preferably, the power module further comprises a DC-LDO conversion module, the DC-LDO conversion module is connected with 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 required voltages for the CPU module, the MCU module and the DC-DC boost IC module, respectively.
Preferably, the LCD display module is further provided with a touch control 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, the values of which are adjusted to change the values of the AVDD voltage and VCOM voltage.
Preferably, the DC-DC boost IC module has a DC-DC chip having 6 pins, 1 st to 6 th pins, respectively.
Preferably, the circuit 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 a first resistor, a second resistor and a third resistor respectively, the third resistor is connected to a fourth resistor and a first capacitor which are connected in parallel, an output interface of the AVDD voltage 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 the 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 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.
Preferably, the CPU module employs an AC3561 chip.
In the above-mentioned vehicle-mounted LVDS interface LCD self-adapting application device, the said LCD display module has LVDS interface to connect CPU module and DC-DC boost IC module, control the LCD display module through CPU module, provide the required voltage for LCD display module through DC-DC boost IC module, still there are touch control AVDD/VCOM in order to adjust the value of AVDD voltage and VCOM voltage to the value that the LCD display module works normally; 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 a touch control AVDD/VCOM for adjusting the value of the AVDD voltage/VCOM voltage, so that the display effect of all LCDs with the same LVDS interface is adjusted in a visual interface soft control mode, and the vehicle-mounted LVDS interface LCD self-adaptive application device can be used in a plug-and-play mode without adapting to each LCD display module through a manual resistor, is simple and convenient to use, flexible in design and compact in structure, and has a wide application prospect.
Drawings
Fig. 1 is a schematic block diagram of a 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 an embodiment of the present invention.
Fig. 4 is a schematic diagram of a local hardware circuit for adjusting a VCOM voltage value by a DC-DC boost IC module of the vehicle LVDS interface LCD adaptive application device according to an embodiment of the invention.
Fig. 5 is a schematic diagram of a touch control AVDD/VCOM adjusting AVDD voltage/VCOM voltage value of the vehicle-mounted LVDS interface LCD adaptive application device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific embodiments and drawings.
Referring to fig. 1, a vehicle-mounted LVDS interface LCD adaptive application apparatus according to an embodiment of the present invention includes an LCD display module 1, a CPU module 2, an MCU module 3, and a power module, where 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 through the LVDS interface 11, and the DC-DC boost IC module 41 is configured to provide a required voltage to the LCD display module 1, 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 are in bidirectional communication through serial ports, the DC-DC boost IC module 41 receives a voltage regulating signal from the MCU module 3 to regulate the output value of voltage, and the touch control AVDD/VCOM12 is regulated to respectively regulate the values of the AVDD voltage and the VCOM voltage of the LCD display module 1, 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 adjustment data to the MCU module 3 through a serial port mode, 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 regulating 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, so as to satisfy the normal display of the LCD display module 1 in various states, including the processes of turning on, ACC OFF, powering down, and dormancy waking up of the LCD.
Preferably, the power module further includes a DC-LDO conversion module 42, where 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, and the DC-LDO conversion module 42 is configured to convert an external voltage and provide a required voltage to 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 an adjustable range is designed for output of AVDD voltage and VCOM voltage by the touch control AVDD/VCOM12 and a sliding bar 131 under the touch secondary display interface 13 to meet different voltage requirements of all 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 conveniently adjust the display effect, and after the effect debugging is completed, the floating frame is closed by clicking a closing button.
Referring to fig. 1-4, the MCU module 3 is shown adjusting the AVDD voltage value 411 and VCOM voltage value 412 of the LCD module 1 by adjusting the PWM signal. Preferably, the MCU chip 31 adopted by the MCU module 3 meets the design requirements of other functions such as sleep and sleep wake-up functions, system reset functions and power-on ignition functions. Preferably, the DC-DC boost IC module 41 has a plurality of resistors, capacitors and diodes whose values are adjusted to change the values of the AVDD voltage and 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, 1 st to 6 th pins, respectively.
Preferably, the circuit 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 a first resistor, a second resistor and a third resistor, the third resistor is connected to a fourth resistor and a first capacitor which are connected in parallel, an output interface of the AVDD voltage is connected to the outside of 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 the output value of the AVDD voltage. In the embodiment of the 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=150kΩ, r1028=1kΩ, r1030=15kΩ, r1374=15kΩ, and c1231=1nf are values that are feasible after multiple adjustments, and may be directly introduced for use.
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=2.2kΩ, r1256=1kΩ, and r0131=860 Ω are values that can be directly used after multiple adjustments.
Preferably, the voltage module is packaged by a general SOT23-6 package so as to facilitate type selection; the CPU module adopts a Jie-developing technology main control AC3561 chip corresponding to a special chip of the vehicle machine so as to be convenient for adapting to various vehicle types.
For the LCD display module with LVDS interface, because of the difference of glass and drive IC, the difference of AVDD voltage and VCOM voltage is directly affected except for the established feasible LVDS signal and stable 3.3V.
According to the vehicle-mounted LVDS interface LCD self-adaptive application device, through the design of hardware matching and software linkage, the values of the AVDD voltage and the VCOM voltage on the sliding bar 131 of the LCD display module 1 are changed to match the different requirements of different voltage requirements of different manufacturers and different sizes of LCD modules of the same manufacturer, and the resistor is not required to be manually adjusted; the manufacturer has convenient stock, and the problem of unmatched display modules of different manufacturers is not considered; the assembly is simple and convenient, the production efficiency is greatly improved, and the cost of production elements is reduced; the intelligent vehicle-mounted rearview mirror monitoring navigation device is widely applied to the fields of vehicle machines (front and rear mounted), intelligent vehicle-mounted rearview mirror monitoring navigation products, part mark machines, two-passenger one-danger products, tablet computers and the like.
It should be noted that the present invention is not limited to the above embodiments, and those skilled in the art can make other changes according to the inventive spirit of the present invention, and these changes according to the inventive spirit of the present invention should be included in the scope of the present invention as claimed.
Claims (4)
1. The vehicle-mounted LVDS interface LCD self-adaptive application device 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 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 regulation signal from the MCU module to regulate the output voltage value; the CPU module and the MCU module are in bidirectional communication through serial ports, the touch control AVDD/VCOM is used for respectively adjusting the values of the AVDD voltage and the VCOM voltage of the LCD display module to adjust the display effect of the LCD, the voltage adjusting signals are PWM signals, the PWM signals comprise MCU-PWM-AVDD voltage signals and MCU-PWM-VCOM voltage signals, the MCU module respectively or simultaneously controls the duty ratio and the switching time of the MCU-PWM-AVDD voltage signals and the MCU-PWM-VCOM voltage signals to meet the normal display of the LCD display module in various states, the DC-DC boost IC module is provided with a plurality of resistors, capacitors and diodes, the values of the resistors, the capacitors and the diodes are adjusted to change the values of the AVDD voltage and the VCOM voltage, the DC-DC boost IC module is provided with a DC-DC chip, the DC-DC chip is provided with 6 pins, the circuit for adjusting the voltage of the AVDD 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 a first resistor, a second resistor and a third resistor respectively, the third resistor is connected to a fourth resistor and a first capacitor which are connected in parallel, an output interface of the AVDD voltage is connected outside the first resistor, the fourth resistor outputs an MCU-PWM-AVDD voltage signal, 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 the output value of the AVDD voltage, and the circuit for adjusting the VCOM voltage in the touch control AVDD/VCOM is a sixth resistor connected in parallel with a fifth resistor, the circuit is composed of a second capacitor, a seventh resistor and a third capacitor, wherein 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 so as to control the output value of VCOM voltage.
2. The device of claim 1, wherein the power module further comprises a DC-LDO conversion module, the DC-LDO conversion module being connected to the CPU module, the MCU module, and the DC-DC boost IC module, respectively, the DC-LDO conversion module being configured to convert an external voltage and provide the CPU module, the MCU module, and the DC-DC boost IC module with the required voltages, respectively.
3. The device for adaptive application of an LCD with a vehicle LVDS interface according to claim 1, wherein the LCD display module is further provided with a touch-control secondary display interface for displaying AVDD voltage and VCOM voltage values.
4. The vehicle-mounted LVDS interface LCD adaptive application apparatus of claim 1, wherein the CPU module employs an AC3561 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910447144.4A CN110136671B (en) | 2019-05-27 | 2019-05-27 | LCD self-adaptive application device with vehicle-mounted LVDS interface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910447144.4A CN110136671B (en) | 2019-05-27 | 2019-05-27 | LCD self-adaptive application device with vehicle-mounted LVDS interface |
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| CN110136671A CN110136671A (en) | 2019-08-16 |
| CN110136671B true CN110136671B (en) | 2024-03-12 |
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2019
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| CN101147185A (en) * | 2005-01-26 | 2008-03-19 | 霍尼韦尔国际公司 | Active Matrix Organic Light Emitting Diode Displays |
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| CN110136671A (en) | 2019-08-16 |
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