Low-power-consumption LCD circuit and LCD display

Abstract

The embodiment of the utility model provides a low-power-consumption LCD circuit and an LCD display, and the low-power-consumption LCD circuit comprises a display controller, a switching circuit and a power consumption adjusting module. The display controller comprises a GPIO pin; the switching circuit is connected to the display controller through a GPIO pin, when the display controller detects a special picture, the switching circuit is turned on, and otherwise, the switching circuit is turned off; the power consumption adjusting module is connected to the switching circuit, when the switching circuit is turned on, the power consumption adjusting module outputs low-power-consumption VAA voltage, and otherwise, the power consumption adjusting module outputs conventional VAA voltage. By monitoring and recognizing the special picture characteristics in the display content in real time and intelligently adjusting the input voltage of the LCD, the requirements of different types of special pictures can be met, the most appropriate voltage level is selected, the power consumption of the LCD under the special pictures is effectively reduced, the energy efficiency performance of equipment is improved, and the purposes of energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] The utility model relates to a low-power LCD circuit and an LCD display, belonging to the technical field of LCD displays. Background Art

[0002] With the popularization of electronic products and the continuous increase of multimedia content, as one of the mainstream display technologies, LCD displays play an important role in daily life. However, when displaying specific types of pictures (such as large-area white backgrounds, high-contrast dynamic pictures), it often leads to a significant increase in the power consumption of LCD displays. Such pictures usually require a high backlight brightness and frequent changes of liquid crystal molecules, bringing additional energy consumption to the device.

[0003] For example, when displaying a large amount of white background, the entire backlight module needs to maintain a high brightness, consuming a large amount of energy; high-contrast dynamic pictures also cause the liquid crystal molecules to frequently switch states, further increasing the power consumption of the device. These problems not only affect the battery life and user experience of electronic devices, but also are not conducive to energy conservation and environmental protection.

[0004] Therefore, there is an urgent need in the market for a low-power LCD circuit design to solve the problem of excessive power consumption of LCD displays under special pictures. Summary of the Utility Model

[0005] In view of this, the utility model provides a low-power LCD circuit and an LCD display.

[0006] In a first aspect, an embodiment of the utility model provides a low-power LCD circuit, including: a display controller, a switching circuit, and a power consumption adjustment module;

[0007] The display controller includes GPIO pins;

[0008] The switching circuit is connected to the display controller through the GPIO pins. When the display controller detects a special picture, the switching circuit is turned on, otherwise the switching circuit is turned off;

[0009] The power consumption adjustment module is connected to the switching circuit. When the switching circuit is turned on, the power consumption adjustment module outputs a low-power VAA voltage, otherwise it outputs a conventional VAA voltage.

[0010] As a preferred embodiment of the utility model, the special pictures include high-contrast pictures, heavy-load pictures, and pure-white pictures.

[0011] As a preferred embodiment of the utility model, the GPIO pins output a low-level signal in the normal mode. When the display controller detects a special picture, the GPIO pins switch to output a high-level signal.

[0012] As a preferred embodiment of the present utility model, the switch circuit includes an MOS transistor Q1, and the GPIO pin is connected to the gate of the MOS transistor. When a low-level signal is output from the GPIO pin, the MOS transistor Q1 is turned off, and when a high-level signal is output from the GPIO pin, the MOS transistor is turned on.

[0013] As a preferred embodiment of the present utility model, the power consumption adjustment module includes a power IC for providing a first voltage.

[0014] As a preferred embodiment of the present utility model, the power consumption adjustment module further includes: a boost circuit connected to the LX pin of the power IC for boosting the first voltage output by the power IC and outputting a second voltage.

[0015] As a preferred embodiment of the present utility model, the power consumption adjustment module further includes: a voltage division circuit connected to the boost circuit and the switch circuit;

[0016] The voltage division circuit includes a first voltage division line and a second voltage division line;

[0017] When the switch circuit is turned off, the first voltage division line is turned on and outputs a conventional VAA voltage;

[0018] When the switch circuit is turned on, the second voltage division line is turned on and outputs a low-power VAA voltage.

[0019] As a preferred embodiment of the present utility model, the MOS transistor Q1 is one of N-type or P-type.

[0020] As a preferred embodiment of the present utility model, the MOS transistor Q1 is N-type, and the voltage division circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, and a VAA output terminal;

[0021] One end of the resistor R1 is connected to the rectifier filter circuit, and one end of the resistor R4 is connected to the VAA output terminal;

[0022] The other end of the resistor R1 is grounded after being sequentially connected in series with the resistor R2 and the resistor R3;

[0023] The other end of the resistor R1 is also connected to the drain of the MOS transistor Q1;

[0024] The other end of the resistor R4 is connected to the source of the MOS transistor Q1;

[0025] The first voltage division line includes the resistor R1, the resistor R2, and the resistor R3;

[0026] The second voltage division line includes the resistor R1, the resistor R2, the resistor R3, and the resistor R4.

[0027] In a second aspect, the present utility model further provides an LCD monitor, which includes a low-power LCD circuit as in any embodiment of the present utility model.

[0028] The present utility model has the following beneficial effects compared with the prior art:

[0029] In the embodiment of the present utility model, by real-time monitoring and identifying special picture features in the display content, and intelligently adjusting the input voltage of the LCD monitor according to the detected special picture to meet the requirements of different types of special pictures and select the most appropriate voltage level, it can effectively reduce the power consumption of the LCD monitor under special pictures, improve the energy efficiency performance of the device, and achieve the purpose of energy conservation and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0031] Figure 1 It is a schematic diagram of the modules of a low-power LCD circuit in an embodiment of the present utility model;

[0032] Figure 2 It is a circuit diagram of a low-power LCD circuit in an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0034] Embodiment:

[0035] In a first aspect, as Figure 1-2 shown, an embodiment of the present utility model provides a low-power LCD circuit, including: a display controller 100, a switching circuit 200, and a power consumption adjustment module 300;

[0036] The display controller 100 includes GPIO pins;

[0037] The switch circuit 200 is connected to the display controller 100 through the GPIO pin. When the display controller 100 detects a special screen, the switch circuit 200 is turned on; otherwise, the switch circuit 200 is turned off.

[0038] The power consumption adjustment module 300 is connected to the switch circuit 200. When the switch circuit 200 is turned on, the power consumption adjustment module 300 outputs a low-power VAA voltage; otherwise, it outputs a normal VAA voltage.

[0039] In the embodiment of the present invention, by real-time monitoring and identifying the special screen features in the display content, the input voltage of the LCD monitor is intelligently adjusted according to the detected special screen to meet the requirements of different types of special screens, and the most appropriate voltage level is selected, which can effectively reduce the power consumption of the LCD monitor under special screens, improve the energy efficiency performance of the device, and achieve the purpose of energy conservation and environmental protection.

[0040] As a preferred embodiment of the present invention, the special screen includes a high-contrast screen, a heavy-load screen, and a pure-white screen.

[0041] For example, by using an image processing algorithm, the special screen features in the display content are real-time monitored and identified, such as detecting special situations such as a large-area white background (regarded as a pure-white screen), a high-contrast dynamic screen (regarded as a high-contrast screen), screen flicker, and a heavy-load screen (regarded as a heavy-load screen), and they are clearly located as high-power consumption scenarios. Therefore, a suitable VAA voltage output is adjusted for this high-power consumption scenario, thereby reducing power consumption and improving energy efficiency performance.

[0042] As a preferred embodiment of the present invention, the GPIO pin outputs a low-level signal in the normal mode. When the display controller detects a special screen, the GPIO pin switches to output a high-level signal.

[0043] As a preferred embodiment of the present invention, the switch circuit includes an MOS transistor Q1. The GPIO pin is connected to the gate of the MOS transistor. When the GPIO pin outputs a low-level signal, the MOS transistor Q1 is turned off. When the GPIO pin outputs a high-level signal, the MOS transistor is turned on. Among them, since the MOS transistor switching element has a high input impedance and a low on-resistance, the energy loss during the switching process is small, which is beneficial to reducing the power consumption and heat generation of the device, has high thermal stability, and the switching speed is very fast. Only by changing the gate voltage can the switching action be achieved, and there is no need to provide a large driving current. Therefore, in the embodiment of the present invention, an MOS transistor is selected as the "trigger switch" for the power consumption adjustment module to turn on and adjust the output VAA voltage.

[0044] As a preferred embodiment of the present utility model, the power consumption adjustment module includes a power IC for providing a first voltage.

[0045] As a preferred embodiment of the present utility model, the power consumption adjustment module further includes: a boost circuit connected to the LX pin of the power IC for boosting the first voltage output by the power IC and outputting a second voltage. It should be noted that for the structure of this boost circuit, since the required voltage can be flexibly set according to the actual situation, the present utility model does not make specific limitations on this, as long as the purpose of boosting can be achieved.

[0046] As a preferred embodiment of the present utility model, the power consumption adjustment module further includes: a voltage dividing circuit connected to the boost circuit and the switch circuit;

[0047] The voltage dividing circuit includes a first voltage dividing line and a second voltage dividing line;

[0048] When the switch circuit is closed, the first voltage dividing line conducts and outputs the conventional VAA voltage;

[0049] When the switch circuit is open, the second voltage dividing line conducts and outputs the low-power VAA voltage.

[0050] As a preferred embodiment of the present utility model, the MOS transistor Q1 is one of N-type or P-type.

[0051] As a preferred embodiment of the present utility model, a rectifying and filtering circuit is further included;

[0052] The MOS transistor Q1 is N-type, and the voltage dividing circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, and a VAA output terminal;

[0053] One end of the resistor R1 is connected to the rectifying and filtering circuit, and one end of the resistor R4 is connected to the VAA output terminal;

[0054] The other end of the resistor R1 is sequentially connected in series with the resistor R2 and the resistor R3 and then grounded;

[0055] The other end of the resistor R1 is also connected to the drain of the MOS transistor Q1;

[0056] The other end of the resistor R4 is connected to the source of the MOS transistor Q1;

[0057] The first voltage dividing line includes the resistor R1, the resistor R2, and the resistor R3;

[0058] The second voltage dividing line includes the resistor R1, the resistor R2, the resistor R3, and the resistor R4.

[0059] Reference Figure 2 As shown, the rectifying and filtering circuit in the embodiment of the present utility model preferably includes capacitors C1, C2, C3, and C4 connected in parallel, which can realize the filtering of the circuit.

[0060] The working principle of the low-power LCD circuit in the embodiment of the present utility model is as follows:

[0061] The Tcon IC continuously detects the display screen of the display. When the display screen is normal, as Figure 2 shown, the GPIO pin outputs a low-level signal, and this low-level signal does not trigger the switching circuit (MOS transistor Q1) to turn on. The switching circuit (MOS transistor Q1) is in the off state. At this time, in the voltage-dividing circuit, the first voltage-dividing line is conducting and outputs the conventional VAA voltage. That is, resistors R1, R2, and R3 are connected in series and then grounded, and the conventional VAA voltage is output at one end of resistor R1.

[0062] When a special screen (such as a high-contrast screen, a heavy-load screen, and a pure-white screen, etc.) is detected, the GPIO pin will switch from the conventional low-level signal to a high-level signal; this high-level signal will trigger the switching circuit (MOS transistor Q1) to turn on. At this time, as Figure 2 shown, in the voltage-dividing circuit, the second voltage-dividing line is conducting and outputs the low-power VAA voltage. That is, resistors R1 and R4 are connected in parallel, and then connected in series with resistors R2 and R3 and then grounded, and the conventional VAA voltage is output at one end of resistor R1.

[0063] Among them, the introduction of resistor R4 will change the voltage value at the output end. The specific value of the output low-power VAA voltage will be determined by R4. According to the actual needs of the user, the value of the adjusted low-power VAA voltage can be changed by changing the resistance value of R4.

[0064] In a second aspect, the present utility model also provides an LCD monitor, including the low-power LCD circuit in any embodiment of the present utility model.

[0065] The above is only a preferred embodiment of the patent of the present utility model, but the protection scope of the patent of the present utility model is not limited thereto. Any person skilled in the art within the scope disclosed by the patent of the present utility model, according to the technical solution and the inventive concept of the patent of the present utility model, makes equivalent substitutions or changes, all belong to the protection scope of the patent of the present utility model.

Claims

1. A low power consumption LCD circuit, characterized in that: include: Display controller, switch circuit and power consumption regulation module; The display controller includes GPIO pins; The switch circuit is connected to the display controller via the GPIO pin, and when the display controller detects a special screen, the switch circuit is turned on, otherwise the switch circuit is turned off; The power consumption regulating module is connected to the switch circuit. When the switch circuit is turned on, the power consumption regulating module will output a low power consumption VAA voltage, otherwise it will output a normal VAA voltage.

2. The low power consumption LCD circuit according to claim 1, characterized in that: The special screens include high-contrast screens, heavy-load screens and pure white screens.

3. The low power consumption LCD circuit according to claim 1, characterized in that: The GPIO pin outputs a low level signal in a normal mode, and when the display controller detects a special screen, the GPIO pin switches to output a high level signal.

4. The low power consumption LCD circuit according to claim 3, characterized in that: The switch circuit includes a MOS tube Q1, the GPIO pin is connected to the gate of the MOS tube, when the GPIO pin outputs a low level signal, the MOS tube Q1 is turned off, and when the GPIO pin outputs a high level signal, the MOS tube is turned on.

5. The low power consumption LCD circuit according to claim 4, characterized in that: The power consumption adjustment module comprises a powerIC, which is used to provide a first voltage.

6. The low power consumption LCD circuit according to claim 5, characterized in that: The power consumption adjustment module further includes: a boost circuit, which is connected to the LX pin of the powerIC and is used to boost the first voltage output by the power IC and output a second voltage.

7. The low power consumption LCD circuit according to claim 6, characterized in that: The power consumption adjustment module further includes: a voltage dividing circuit, wherein the voltage dividing circuit is connected to the boosting circuit and the switch circuit; The voltage dividing circuit comprises a first voltage dividing circuit and a second voltage dividing circuit; When the switch circuit is turned off, the first voltage-dividing circuit is turned on and outputs the normal VAA voltage; When the switch circuit is turned on, the second voltage-dividing circuit is turned on and outputs the low-power consumption VAA voltage.

8. The low power consumption LCD circuit according to claim 7, characterized in that: The MOS transistor Q1 is of N type or P type.

9. The low power consumption LCD circuit according to claim 8, characterized in that: Also includes a rectifier and filter circuit; The MOS tube Q1 is of N type, and the voltage divider circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a VAA output terminal; One end of the resistor R1 is connected to the rectifier filter circuit, one end of the resistor R4 and the VAA output end; The other end of the resistor R1 is connected in series with the resistor R2 and the resistor R3 in sequence and then grounded; The other end of the resistor R1 is also connected to the drain of the MOS tube Q1; The other end of the resistor R4 is connected to the source of the MOS tube Q1; The first voltage dividing circuit includes the resistor R1, the resistor R2 and the resistor R3; The second voltage dividing circuit includes the resistor R1 , the resistor R2 , the resistor R3 and the resistor R4 .

10. An LCD display, characterized in that: The LCD display comprises the low power consumption LCD circuit according to any one of claims 1-9.

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