CN218241291U - Liquid crystal display brightness control system based on voltage regulation - Google Patents
Liquid crystal display brightness control system based on voltage regulation Download PDFInfo
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- CN218241291U CN218241291U CN202221746533.0U CN202221746533U CN218241291U CN 218241291 U CN218241291 U CN 218241291U CN 202221746533 U CN202221746533 U CN 202221746533U CN 218241291 U CN218241291 U CN 218241291U
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Abstract
The utility model is suitable for a LCD screen technical field provides a LCD screen brightness control system based on voltage control, has solved the inconvenient problem of current device brightness control for the display watches the comfort level and reduces; the liquid crystal screen brightness control system based on voltage regulation comprises: the signal acquisition unit is used for acquiring brightness adjusting signals; the conduction control circuit is electrically connected with the signal acquisition unit and is used for executing the conduction and disconnection operations of the system; the brightness control module is electrically connected with the conduction control circuit and used for sending a brightness adjusting instruction, and the backlight voltage output unit is electrically connected with the brightness control module and used for changing the backlight voltage output and realizing the adjustment of the backlight brightness; the embodiment of the utility model provides a set up luminance control module, luminance control module can improve the display through adjusting luminance in a poor light and watch the comfort level, adapts to light problem under different time, the mode, and energy-conserving more.
Description
Technical Field
The utility model belongs to the technical field of the LCD screen, especially, relate to a LCD screen brightness control system based on voltage control.
Background
The LCD is a Liquid Crystal Display, and is constructed by placing Liquid Crystal in two parallel glasses, and there are many vertical and horizontal fine wires between the two glasses, and controlling the rod-like Crystal molecules to change direction by electrifying or not, so as to refract light to generate picture.
Chinese patent CN215449811U discloses a high-brightness WXGA liquid crystal screen, which comprises a liquid crystal screen main body, wherein a glass cover is fixedly installed on the outer surface of the front end of the liquid crystal screen main body, a support column is fixedly welded at the position, close to the middle position, of the lower end of the liquid crystal screen main body, insect prevention mechanisms are arranged on the two sides of the liquid crystal screen main body, protection mechanisms are arranged at the lower ends of the support columns, a lug is fixedly installed on the outer surface of the front end of the support column, each insect prevention mechanism comprises a fixed block, a protection cover, an insect receiving box, a groove and a fixed rod, the outer surface of one side of the fixed block is fixedly provided with the protection cover, the lower end, close to the protection cover, of one side of the fixed block is movably provided with the insect receiving box, the outer surface of the lower end of the insect receiving box is provided with the groove, the fixed rod is fixedly installed inside the fixed block, and the electric shock net and the lamp source are both fixed through the two fixed rods; however, the brightness of the conventional device is inconvenient to adjust, so that the viewing comfort of the display is reduced, and therefore, a liquid crystal display brightness control system based on voltage adjustment is provided.
SUMMERY OF THE UTILITY MODEL
The utility model provides a LCD screen brightness control system based on voltage control aims at solving current device brightness control inconvenience for the problem that the comfort level reduced is watched to the display.
The utility model relates to a realize like this, a LCD screen brightness control system based on voltage regulation, LCD screen brightness control system based on voltage regulation includes:
the signal acquisition unit is used for acquiring brightness adjusting signals;
the conduction control circuit is electrically connected with the signal acquisition unit and is used for executing the conduction and the disconnection of the system;
a brightness control module electrically connected to the conduction control circuit for sending a brightness adjustment command, an
And the backlight voltage output unit is electrically connected with the brightness control module and used for changing the backlight voltage output and realizing the adjustment of the backlight brightness.
Preferably, the signal acquisition unit is a PWM input terminal, the PWM input terminal includes an input terminal anode and an input terminal cathode, and the input terminal anode and the input terminal cathode are respectively electrically connected to the conduction control circuit.
Preferably, a power input unit for providing power is further included, the power input unit including a 12V power supply.
Preferably, the system further comprises a backlight enabling receiving end for receiving the backlight illumination intensity control signal, and the backlight enabling receiving end is connected with the brightness control module in a communication manner.
Preferably, the conduction control circuit is controlled by conduction of a MOS (metal oxide semiconductor) tube.
Preferably, the brightness control module is composed of a BOOST circuit LED driving IC.
Preferably, the output voltage of the backlight voltage output unit is 36.4-41.6V.
Preferably, the brightness control module further comprises:
the model of the brightness control chip is LP3350SOF.
Compared with the prior art, the embodiment of the application mainly has the following beneficial effects:
the embodiment of the utility model provides a set up luminance control module, luminance control module can improve the display through adjusting luminance in a poor light and watch the comfort level, adapts to light problem under different time, the mode, and energy-conserving more.
Drawings
Fig. 1 is a schematic structural diagram of a liquid crystal display brightness control system based on voltage regulation according to the present invention.
Fig. 2 is a circuit control diagram of the present invention.
In the figure: the device comprises a signal acquisition unit 1, a conduction control circuit 2, a brightness control module 3, a backlight voltage output unit 4, a power input unit 5 and a backlight enabling receiving end 6.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The backlight control of the LCD screen has two modes, the LCD backlight is controlled by using a BOOST circuit (series connection) or a CHARGE PUMP (parallel connection), according to friendly G190ETN01.8 backlight parameters of the LCD screen, the voltage range is 36.4-41.6V, the current is constant at 94.5mA, the brightness of the LCD screen can be controlled by adopting voltage regulation, the voltage is higher, generally, a power supply module with standard output about 40V is not provided, voltage fine regulation is required to be realized by brightness regulation, and the sampling rate is high, so that a liquid crystal screen brightness control system based on voltage regulation is provided, the backlight brightness requirement is met, the brightness of the whole display screen is uniform, the brightness can be conveniently regulated, the space occupied by a driving circuit in a PCB (printed circuit board) is small, the working efficiency is high, and the comprehensive cost is low.
The embodiment of the utility model provides a LCD screen brightness control system based on voltage control, as shown in fig. 1-2, LCD screen brightness control system based on voltage control includes:
the signal acquisition unit 1 is used for acquiring brightness adjusting signals;
the conduction control circuit 2 is electrically connected with the signal acquisition unit 1 and is used for executing the conduction and the disconnection of the system;
a brightness control module 3 electrically connected to the conduction control circuit 2 for sending a brightness adjustment command, an
And the backlight voltage output unit 4 is electrically connected with the brightness control module 3 and is used for changing the backlight voltage output to realize the adjustment of the backlight brightness.
In this embodiment, in operation, after the signal acquisition unit 1 acquires the user operation information by the brightness control module 3, the signal acquisition unit adjusts and outputs the PWM signal to the system for controlling the brightness of the liquid crystal display by voltage adjustment, and changes the backlight voltage output, thereby quickly adjusting the backlight brightness.
The embodiment of the utility model provides a set up luminance control module 3, luminance control module 3 can improve the display through adjusting luminance in a poor light and watch the comfort level, adapts to light problem under different time, the mode, and more energy-conserving.
The utility model discloses in the further preferred embodiment, as shown in fig. 1, signal acquisition unit 1 is the PWM input, and the PWM input includes input positive pole and input negative pole, input positive pole and input negative pole respectively with conduction control circuit 2 electric connection.
In this embodiment, the embodiment of the utility model provides a still including power input unit 5 that is used for providing electric energy, power input unit 5 includes the 12V power, still including the enable receiving terminal 6 in a poor light that is used for receiving backlight illumination intensity control signal, and enable receiving terminal 6 in a poor light communication connection has luminance control module 3.
In this embodiment, the communication connection mode is an RS485 communication mode, a 5G communication mode, or a wireless communication mode, and the conduction control circuit 2 is controlled by the MOS transistor.
In this embodiment, the current passing through each LED is the same by adopting a series connection mode, so that the light emitting uniformity of the light bar is better, the brightness of the LED can be adjusted from no-bright to full-bright level by applying a PWM control signal with a certain duty ratio, and the 12V power supply is input, the PWM input generates a switch by controlling the conduction and the turn-off of the MOS, and the boosting process is an energy transfer process of an inductor.
The inductor absorbs energy during charging and discharges, and if the capacitance is large enough, a continuous current can be maintained at the output during discharging. If this switching process is repeated, a voltage higher than the input voltage is obtained across the capacitor.
When the MOS tube is conducted, a power supply forms a loop through an inductor-the MOS tube, and current is converted into magnetic energy in the inductor for storage; when the MOS tube is turned off, the magnetic energy in the inductor is converted into electric energy which is left negative and right positive at the end of the inductor, the voltage is superposed on the positive end of the power supply, and a loop is formed by the diode and the load to complete the boosting function. And the accurate control of PWM determines the voltage regulation range and sensitivity.
In a further preferred embodiment of the present invention, as shown in fig. 1, the brightness control module 3 is composed of a BOOST circuit LED driver IC, and the output voltage of the backlight voltage output unit 4 is 36.4-41.6V.
In this embodiment, the brightness control module 3 further includes:
the model of the brightness control chip is LP3350SOF, a backlight enabling signal controls a voltage output switch through a CTRL pin of the brightness control chip, and finally an adjustable voltage range of 36.4-41.6V is obtained.
To sum up, the utility model provides a LCD screen brightness control system based on voltage control, the embodiment of the utility model provides a set up brightness control module 3, brightness control module 3 can improve the display through adjusting luminance in a poor light and watch the comfort level, adapts to light problem under different time, the mode, and energy-conserving more.
It should be noted that, for the sake of simplicity, the foregoing embodiments are described as a series of combinations of acts, but it should be understood by those skilled in the art that the present invention is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that acts and modules referred to are not necessarily required by the invention.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the above-described units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or communication connection may be an indirect coupling or communication connection between devices or units through some interfaces, and may be in a telecommunication or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above embodiments are only used to illustrate the technical solution of the present invention, and do not limit the protection scope of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from these embodiments without any inventive step, are within the scope of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still make no creative work on the condition of conflict, and make no additional or additional adjustments according to the feature combinations, features, and other features in the embodiments of the present invention, so as to obtain other technical solutions that are different and not separated from the concept of the present invention, and these technical solutions also belong to the scope of the present invention.
Claims (8)
1. The liquid crystal screen brightness control system based on voltage regulation is characterized by comprising the following components:
the signal acquisition unit is used for acquiring brightness adjusting signals;
the conduction control circuit is electrically connected with the signal acquisition unit and is used for executing the conduction and the disconnection of the system;
a brightness control module electrically connected to the conduction control circuit for sending a brightness adjustment command, an
And the backlight voltage output unit is electrically connected with the brightness control module and used for changing the backlight voltage output and realizing the adjustment of the backlight brightness.
2. The system of claim 1, wherein the signal acquisition unit is a PWM input terminal, the PWM input terminal includes an input terminal anode and an input terminal cathode, and the input terminal anode and the input terminal cathode are electrically connected to the conduction control circuit respectively.
3. The system as claimed in claim 2, further comprising a power input unit for supplying power, wherein the power input unit comprises a 12V power supply.
4. The system as claimed in claim 2, further comprising a backlight enable receiving terminal for receiving the backlight illumination intensity control signal, wherein the backlight enable receiving terminal is communicatively connected to the brightness control module.
5. The system as claimed in any one of claims 2 to 4, wherein the conduction control circuit is controlled by conduction of a MOS transistor.
6. The system as claimed in any one of claims 2 to 4, wherein the brightness control module comprises a BOOST circuit LED driver IC.
7. The system as claimed in claim 6, wherein the output voltage of the backlight voltage output unit is 36.4-41.6V.
8. The system as claimed in claim 6, wherein the brightness control module further comprises:
the model of the brightness control chip is LP3350SOF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221746533.0U CN218241291U (en) | 2022-07-08 | 2022-07-08 | Liquid crystal display brightness control system based on voltage regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221746533.0U CN218241291U (en) | 2022-07-08 | 2022-07-08 | Liquid crystal display brightness control system based on voltage regulation |
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| Publication Number | Publication Date |
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| CN218241291U true CN218241291U (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221746533.0U Active CN218241291U (en) | 2022-07-08 | 2022-07-08 | Liquid crystal display brightness control system based on voltage regulation |
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- 2022-07-08 CN CN202221746533.0U patent/CN218241291U/en active Active
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