CN209168705U - A kind of portable liquid crystal test module and RA experimental provision - Google Patents
A kind of portable liquid crystal test module and RA experimental provision Download PDFInfo
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- CN209168705U CN209168705U CN201821892164.XU CN201821892164U CN209168705U CN 209168705 U CN209168705 U CN 209168705U CN 201821892164 U CN201821892164 U CN 201821892164U CN 209168705 U CN209168705 U CN 209168705U
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- voltage conversion
- backlight
- liquid crystal
- conversion module
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Abstract
The utility model discloses a kind of portable liquid crystal test module and RA experimental provision, portable liquid crystal test module includes: testing host, first voltage conversion module, signal reinforcing module, backlight voltage conversion module, backlight and LCD MODULE；Testing host is electrically connected with backlight voltage conversion module；First voltage conversion module is electrically connected with testing host, backlight voltage conversion module and signal reinforcing module respectively, and the first voltage for exporting testing host is converted to second voltage and is exported respectively to backlight voltage conversion module and signal reinforcing module；Backlight voltage conversion module is electrically connected with backlight, and the second voltage for exporting first voltage conversion module is converted to tertiary voltage and exports to backlight；Signal reinforcing module is electrically connected with LCD MODULE, for enhancing the signal of testing host transmission and exporting to LCD MODULE.The utility model improves the portability of RA experimental system, versatility and programmability.
Description
Technical field
The utility model relates to RA experiment the field of test technology more particularly to a kind of portable liquid crystal test module and RA are real
Experiment device.
Background technique
The RA experimental system of liquid crystal module is used to test the reliability of liquid crystal module software, and existing RA experimental system is driven
8 liquid crystal modules are moved, backlight module needs the outer power supply source of power supply box, thereby results in experiment jig and is difficult to move, structure is too fat to move, just
The property taken and versatility are poor, inconvenient for use.
Therefore, the existing technology needs to be improved and developed.
Utility model content
In view of above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a kind of portable liquid crystal test modules
And RA experimental provision causes structure swelling so that the backlight module of existing RA experimental system be overcome to need the outer power supply source of power supply box
Swollen, portability and versatility are poor, problem inconvenient for use.
The technical solution of the utility model is as follows:
The utility model provides a kind of portable liquid crystal test module, wherein includes: testing host, first voltage conversion
Module, signal reinforcing module, backlight voltage conversion module, backlight and LCD MODULE；Testing host and backlight
Voltage transformation module electrical connection；First voltage conversion module respectively with testing host, backlight voltage conversion module and signal
Reinforcing module electrical connection, the first voltage for exporting testing host is converted to second voltage, and is exported respectively to backlight
Voltage transformation module and signal reinforcing module；Backlight voltage conversion module is electrically connected with backlight, for turning first voltage
The second voltage of mold changing block output is converted to tertiary voltage, and exports to backlight；Signal reinforcing module and LCD MODULE
Electrical connection, for enhancing the signal of testing host transmission and exporting to LCD MODULE.
The portable liquid crystal test module, wherein the testing host controls backlight voltage by I2C interface and turns
Change the mold block.
The portable liquid crystal test module, wherein the first voltage conversion module includes that monolithic synchronous buck is steady
Depressor and the positive low dropout voltage regulator being electrically connected with monolithic synchronous buck regulators.
The portable liquid crystal test module, wherein the monolithic synchronous buck regulators are MP2307 chip, institute
Stating positive low dropout voltage regulator is AMS1117 chip.
The portable liquid crystal test module, wherein the backlight voltage conversion module includes LED driver.
The portable liquid crystal test module, wherein the LED driver is LP8555 chip.
The portable liquid crystal test module, wherein the signal reinforcing module includes eight bi-directional bus drivers.
The portable liquid crystal test module, wherein eight bi-directional bus drivers are 74LVC245 chip.
The portable liquid crystal test module, wherein the testing host is LCM test board.
The utility model also provides a kind of RA experimental provision, wherein including the portable liquid crystal as described in any of the above item
Test module.
The beneficial effects of the utility model are: by being supplied outside the power supply box before increasing the replacement of backlight voltage conversion module
Power supply realizes the portable use of RA experiment jig, has achieved the purpose that optimize RA experiment jig, to simplify RA experiment system
System, improves the portability of RA experimental system, versatility and programmability, experimenter is facilitated to use.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the portable liquid crystal test module of the utility model preferred embodiment.
Fig. 2 is the schematic illustration of the first voltage conversion module of the utility model preferred embodiment.
Specific embodiment
The utility model provides a kind of portable liquid crystal test module and RA experimental provision, for the mesh for making the utility model
, technical solution and effect it is clearer, clear, as follows in conjunction with drawings and embodiments further specifically to the utility model
It is bright.It should be appreciated that specific embodiment described herein is only used to explain the utility model, it is not used to limit originally practical new
Type.
The portable liquid crystal test module of the utility model preferred embodiment, it is shown in Figure 1 comprising: testing host,
First voltage conversion module, signal reinforcing module, backlight voltage conversion module, backlight and LCD MODULE；Test
Mainboard is electrically connected with backlight voltage conversion module；First voltage conversion module is converted with testing host, backlight voltage respectively
Module and the electrical connection of signal reinforcing module, the first voltage for exporting testing host are converted to second voltage, and respectively
It exports to backlight voltage conversion module and signal reinforcing module；Backlight voltage conversion module is electrically connected with backlight, is used for
The second voltage that first voltage conversion module exports is converted into tertiary voltage, and is exported to backlight；Signal reinforcing module with
LCD MODULE electrical connection, for enhancing the signal of testing host transmission and exporting to LCD MODULE.
The utility model realizes that RA is real by the outer power supply source of power supply box before increasing the replacement of backlight voltage conversion module
The portable use for testing jig has achieved the purpose that optimize RA experiment jig, to simplify RA experimental system, has improved RA experiment
The portability of system, versatility and programmability, facilitate experimenter to use.
Further, in the present embodiment, the first voltage conversion module supports voltage conversion comprising monolithic is synchronous
Voltage-releasing voltage stabilizer and the positive low dropout voltage regulator being electrically connected with monolithic synchronous buck regulators.Wherein, the synchronous drop of the monolithic
Pressing voltage-stablizer is preferably MP2307 chip, and the forward direction low dropout voltage regulator is preferably AMS1117 chip.MP2307 integrated chip
Adjustable MOSFET is capable of providing the continuous load current of 3A, input voltage 4.75V to 23V.AMS1117 chip is a forward direction
Low dropout voltage regulator is reduced to 1.2V in 1A current down.There are two versions for AMS1117 chip: fixed output version and adjustable version
This, fixed output voltage is 1.5V, 1.8V, 2.5V, 2.85V, 3.0V, 3.3V, 5.0V, with 1% precision.Specific implementation
When, shown in Figure 2,9V voltage (i.e. first voltage) is converted into 5V electricity with MP2307 chip by the first voltage conversion module
Pressure, is converted into 3.0V (i.e. second voltage) for 5V voltage with AMS1117-3.0V chip, is LP8555 chip and peripheral devices structure
At backlight voltage conversion module provide operating voltage.
Further, in the present embodiment, the backlight is the luminous component of liquid crystal display, the LCD MODULE
For the display unit of liquid crystal display.The signal reinforcing module supports signal reinforcement and data conversion comprising eight two-way
Bus driver.Wherein, eight bi-directional bus drivers are preferably 74LVC245 chip.74LVC245 chip is 8 numbers
According to bus (two-way) driver, when it is implemented, for example, the signal reinforcing module enhances testing host with 74LVC245 chip
The various signals such as the clock signal, reset signal, SPI signal, the MIPI that transmit.
Further, in the present embodiment, the testing host controls backlight voltage conversion module by I2C interface.Institute
Stating testing host is LCM test board.The backlight voltage conversion module supports software adjustment Current Voltage parameter comprising
LED driver.Wherein, the LED driver is preferably LP8555 chip.Wherein, I2C (Inter-Integrated
Circuit) be a kind of bus-organization, it only needs SCL clock signal wire and SDA data line, both threads can will connection with
Equipment in bus realizes data communication.When it is implemented, shown in Figure 2, backlight voltage conversion module LP8555 core
3V voltage (i.e. second voltage) is converted into 7~28V voltage (i.e. tertiary voltage) by piece.
LP8555 chip is a White LED driver, and there is asynchronous pressure boosting converter and 12 high-precision currents to receive
Device, Boost is using adaptive output.Backlight illumination can be controlled by the combination of PWM input, I2C or both.
It is controlled using I2C, device configuration can be more freely arranged in user, and controls with additional I2C brightness.Slope, PSPWM
EPROM (erasable programmable read-only memory) default value, Huo Zheyong can be used in the configuration of (phase-shifting PWM) or different boost modes
Family can be set.LP8555LED PWM light modulating frequency can be set by external resistor (PFSET=1 selection), or by pre-
First configure eprom memory.Select the conversion time between PWM light modulating frequency (PFRQ field) two brightness values that can incite somebody to action
EPROM field is programmed into 200 milliseconds from 0.The identical slope time is used for tilted upward, with the increase of the gradient, brightness change
The eyes of people can be made more pleasing.It is realized with digital smoothing filter, and intensity filter is the smooth EPROM word of setting
Section.LP8555 chip has 12 LED current receivers, can be pre-configured with to detect the quantity of additional LED string automatically, certainly
It is dynamic to remove not used electric current receiver and adjust remaining phase.Therefore the utility model backlight voltage conversion module, can
To be flexibly adapted to the different liquid crystal module of LED quantity, there is extensive versatility.
Further, the utility model embodiment also provides a kind of RA experimental provision, wherein including as described above just
Take formula LCD testing.
It should be understood that the application of the utility model is not limited to above-mentioned citing, those of ordinary skill in the art are come
It says, it can be modified or changed according to the above description, and all these modifications and variations all should belong to the appended power of the utility model
The protection scope that benefit requires.
Claims (10)
1. a kind of portable liquid crystal test module characterized by comprising testing host, first voltage conversion module, signal add
Strong module, backlight voltage conversion module, backlight and LCD MODULE；
Testing host is electrically connected with backlight voltage conversion module；
First voltage conversion module is electrically connected with testing host, backlight voltage conversion module and signal reinforcing module respectively,
First voltage for exporting testing host is converted to second voltage, and is exported respectively to backlight voltage conversion module and letter
Number reinforcing module；
Backlight voltage conversion module is electrically connected with backlight, the second voltage conversion for exporting first voltage conversion module
For tertiary voltage, and export to backlight；
Signal reinforcing module is electrically connected with LCD MODULE, for enhancing the signal of testing host transmission and exporting to liquid crystal
Show module.
2. portable liquid crystal test module according to claim 1, which is characterized in that the testing host is connect by I2C
Mouth control backlight voltage conversion module.
3. portable liquid crystal test module according to claim 1, which is characterized in that the first voltage conversion module packet
The positive low dropout voltage regulator for including monolithic synchronous buck regulators and being electrically connected with monolithic synchronous buck regulators.
4. portable liquid crystal test module according to claim 3, which is characterized in that the monolithic synchronous buck regulators
For MP2307 chip, the forward direction low dropout voltage regulator is AMS1117 chip.
5. portable liquid crystal test module according to claim 1, which is characterized in that the backlight voltage conversion module
Including LED driver.
6. portable liquid crystal test module according to claim 5, which is characterized in that the LED driver is LP8555
Chip.
7. portable liquid crystal test module according to claim 1, which is characterized in that the signal reinforcing module includes eight
Position bi-directional bus driver.
8. portable liquid crystal test module according to claim 7, which is characterized in that eight bi-directional bus drivers
For 74LVC245 chip.
9. portable liquid crystal test module according to claim 1, which is characterized in that the testing host is LCM test
Plate.
10. a kind of RA experimental provision, which is characterized in that tested including portable liquid crystal as described in any one of claims 1 to 9
Module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821892164.XU CN209168705U (en) | 2018-11-16 | 2018-11-16 | A kind of portable liquid crystal test module and RA experimental provision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821892164.XU CN209168705U (en) | 2018-11-16 | 2018-11-16 | A kind of portable liquid crystal test module and RA experimental provision |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209168705U true CN209168705U (en) | 2019-07-26 |
Family
ID=67338660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821892164.XU Active CN209168705U (en) | 2018-11-16 | 2018-11-16 | A kind of portable liquid crystal test module and RA experimental provision |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209168705U (en) |
-
2018
- 2018-11-16 CN CN201821892164.XU patent/CN209168705U/en active Active
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