CN116704961B - Backlight power consumption reduction hardware circuit and device - Google Patents

Abstract

The application provides a backlight power consumption reduction hardware circuit, which comprises a first boosting unit, wherein the first boosting unit comprises a first diode D1, a second diode D2, a first capacitor C1 and a second capacitor C2; the first end of the first diode D1 is connected with the first input end Vboost, and the second end of the first diode D1 is connected with the first end of the second diode D2; the second end of the second diode D2 is an output end; the first end of the first capacitor C1 is respectively connected with the second end of the first diode D1 and the first end of the second diode D2; the second end of the first capacitor C1 is connected with the second input end SW; the first end of the second capacitor C2 is connected to the second end of the second diode D2, and the second end of the second capacitor C2 is grounded. According to the application, the first boosting unit enables the hardware circuit to achieve a double boosting effect, so that no perceived boosting of the display device is realized, the power consumption of the hardware circuit is reduced, and the boosting efficiency is improved.

Description

A backlight power consumption reduction hardware circuit and device

Technical Field

The present application relates to the field of circuit control, and in particular to a backlight power consumption reduction hardware circuit and device.

Background technique

Currently, display screens are mainly LCDs, and LCDs themselves do not emit light. In order for LCDs to display images, they must use backlights. Common backlights are generally composed of several LED lights, and the number of LED lights is determined by the size of the screen.

As the LED light efficiency gradually improves, LED has a very long life, and it does not contain Hg, which is very destructive to the environment. Due to these advantages of LED, it is more and more widely used in the field of display backlight sources. However, since LED lights need to be designed in series in most cases, there are two problems when the backlight chip driver circuit performs voltage doubling conversion: 1. It needs to use chips for control, which has a high production cost; 2. The voltage doubling efficiency is low, and the system power loss is high.

In the prior art, the conventional boost circuit uses MOS tubes to boost the voltage, and the boost chip circuit is shown in Figure 1. In the existing boost circuit, the boost chip needs to be controlled by a single-chip microcomputer to turn on and off the power. When the MOS tube is turned on, Vin charges the inductor L1, and the load LED relies on Cout for continuous current supply; when the MOS is turned off, the voltage polarity at the left and right ends of the inductor L1 suddenly changes, Vout = Vin + VL - VD1, and the voltage is boosted.

Summary of the invention

The main purpose of the present application is to provide a backlight power consumption reduction hardware circuit, aiming to solve the technical problem that the existing boost chip has low voltage doubling efficiency during voltage boosting, resulting in high power loss.

In order to achieve the above technical objectives, this application adopts the following technical solutions:

The present application discloses a backlight power consumption reduction hardware circuit, the hardware circuit comprises a first boost unit, the first boost unit comprises a first diode D1, a second diode D2, a first capacitor C1 and a second capacitor C2;

The first end of the first diode D1 is connected to the first input end Vboost, the first input end Vboost is used to provide voltage to the first boost unit, and the second end of the first diode D1 is connected to the first end of the second diode D2;

The second end of the second diode D2 is an output end;

The first end of the first capacitor C1 is connected to the second end of the first diode D1 and the first end of the second diode D2 respectively; the second end of the first capacitor C1 is connected to the second input end SW, and the second input end SW is used to provide voltage to the first boost unit;

A first end of the second capacitor C2 is connected to a second end of the second diode D2, and a second end of the second capacitor C2 is grounded.

In one embodiment of the present invention, the hardware circuit further includes a first inductor L1, a third diode D3, a third capacitor C3 and a fourth capacitor C4;

The first end of the first inductor L1 is connected to the third input end Vin, the third input end Vin is used to provide voltage to the hardware circuit, and the second end of the first inductor L1 is connected to the first end of the third diode D3;

The second end of the third diode D3 is connected to the first end of the first diode D1;

The first end of the fourth capacitor C4 is connected to the second end of the third diode D3 and the first end of the first diode D1 respectively, and the second end of the fourth capacitor C4 is grounded;

The node of the first end of the fourth capacitor C4, the second end of the third diode D3 and the first end of the first diode D1 is the first input end Vboost;

A first end of the third capacitor C3 is connected to the second end of the first inductor L1 , and a second end of the third capacitor C3 is grounded.

In one embodiment of the present invention, the hardware circuit further includes a second inductor L2 and a fifth capacitor C5;

The first end of the second inductor L2 is connected to the first end of the first inductor L1, and the second end of the second inductor L2 is connected to the first end of the third diode D3;

A first end of the fifth capacitor C5 is connected to the second input end SW and a first end of the second inductor L2 respectively, and a second end of the fifth capacitor C5 is grounded.

In one embodiment of the present invention, the first inductor L1 and the second inductor L2 are fixed inductors, and the first inductor L1 and the second inductor L2 are used for one or more of filtering and resonance.

In one embodiment of the present invention, the hardware circuit further includes a feedback unit, and the feedback unit includes a first feedback circuit and a second feedback circuit;

The first end of the first feedback circuit is respectively connected to the node of the second end of the third diode D3, the first end of the first diode D1 and the first end of the fourth capacitor C4, and the second end of the first feedback circuit is connected to the feedback end, and the feedback end is used to receive the feedback signal of the feedback unit;

The first end of the second feedback circuit is connected to the second end of the second diode D2 and the first end of the second capacitor C2 respectively, and the second end of the second feedback circuit is connected to the feedback end;

The first feedback circuit further includes a fourth diode D4, a first end of the fourth diode D4 is connected to the first end of the first feedback circuit, and a second end of the fourth diode D4 is connected to the feedback end.

In one embodiment of the present invention, the hardware circuit further includes at least one second boost unit cascaded with the first boost unit, and the second boost unit includes a fifth transistor D5, a sixth diode D6, a first boost capacitor Cin and a first output capacitor Cout;

Wherein, the first end of the fifth diode D5 is connected to the second end of the second diode D2, and the second end of the fifth diode D5 is connected to the first end of the sixth diode D6;

The second end of the sixth diode D6 is an output end;

The first end of the first boost capacitor Cin is connected to the second end of the fifth diode D5 and the first end of the sixth diode D6 respectively, and the second end of the first boost capacitor Cin is connected to the second input end SW, and the second input end SW is used to provide voltage to the first boost unit and the second boost unit;

A first end of the first output capacitor Cout is connected to a second end of the sixth diode D6 , and a second end of the first output capacitor Cout is grounded.

The present invention also provides a backlight power consumption reduction hardware device based on any of the above, the hardware device comprising:

A hardware circuit, wherein the hardware circuit comprises a first boost unit;

A backlight chip, wherein the backlight chip is connected to the first boost unit, and the backlight chip provides a PWM periodic voltage signal for the first boost unit;

A display device, wherein the display device provides light source for display through a hardware circuit.

In one embodiment of the present invention, the SW pin of the backlight chip is connected to the second input terminal SW of the hardware circuit.

In one embodiment of the present invention, the hardware device further comprises a feedback pin FB of the backlight chip connected to the feedback end of the feedback unit.

In one embodiment of the present invention, the hardware circuit further includes at least one second boost unit, and the second boost unit is cascaded with the first boost unit.

Compared with the traditional backlight circuit, the backlight power consumption reduction hardware circuit provided by the present application achieves a double boosting effect of the hardware circuit through the first boosting unit, and uses the first input terminal Vboost and the second input terminal SW to provide voltage to the first boosting unit, thereby realizing imperceptible boosting of the display device, and does not require the control signal of the backlight chip to participate in the boosting process, thereby reducing the power consumption of the hardware circuit, improving the boosting efficiency, and reducing the production cost.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a chip circuit diagram of an existing backlight circuit;

FIG2 is a chip circuit diagram of a backlight power consumption reduction hardware circuit provided in an embodiment of the present application;

FIG3 is a circuit schematic diagram 1 of a backlight power consumption reduction hardware circuit provided in an embodiment of the present application;

FIG4 is a timing diagram of the circuit diagram of FIG3 ;

FIG5 is a simulation waveform diagram of the circuit schematic diagram of FIG3 ;

FIG6 is a second circuit schematic diagram of a backlight power consumption reduction hardware circuit provided in an embodiment of the present application;

FIG7 is a third circuit schematic diagram of a backlight power consumption reduction hardware circuit provided in an embodiment of the present application;

FIG8 is a fourth circuit schematic diagram of a backlight power consumption reduction hardware circuit provided in an embodiment of the present application;

FIG. 9 is a fifth circuit schematic diagram of a backlight power consumption reduction hardware circuit provided in an embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described below in conjunction with the accompanying drawings.

The terms "first" and "second" in the specification, claims and drawings of this application are only used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

The "embodiment" mentioned in this application means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

In the present application, "at least one (item)" means one or more, "more than one" means two or more, "at least two (items)" means two or three and more than three, and "and/or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and/or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character "/" generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c".

In the embodiments of the present application, the backlight power consumption reduction hardware circuit can be applied to electronic devices. It can be understood that the electronic device can be a mobile phone, a wearable device, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, etc., without specific limitation here.

Embodiment 1

The present application provides a backlight power consumption reduction hardware device based on any of the above-mentioned ones, as shown in Figure 2, which is a circuit diagram of the hardware device provided by an embodiment of the present application. The hardware device includes a hardware circuit, a backlight chip and a display device. The hardware circuit includes a first boost unit, the backlight chip is connected to the first boost unit, and the backlight chip provides a PWM periodic voltage signal to the first boost unit; the display device provides a light source for display through the hardware circuit.

As can be understood by those skilled in the art, the display screen includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), Miniled, MicroLed, Micro-oLed, a quantum dot light-emitting diode (QLED), etc. In some embodiments, the electronic device may include 1 or N display screens, where N is a positive integer greater than 1.

In a further embodiment of the present application, the SW pin of the backlight chip is connected to the second input terminal SW of the hardware circuit, and the feedback pin FB is connected to the feedback terminal of the feedback unit.

Embodiment 2

As shown in Figure 3, Figure 3 is a backlight power consumption reduction hardware circuit provided by an embodiment of the present application, wherein the first boost unit includes a first diode D1, a second diode D2, a first capacitor C1 and a second capacitor C2; wherein, the first end of the first diode D1 is connected to the first input end Vboost, the first input end Vboost is used to provide voltage to the first boost unit, the second end of the first diode D1 is connected to the first end of the second diode D2; the second end of the second diode D2 is the output end; the second end of the first diode D1 is connected to the first end of the second diode D2; the second end of the first capacitor C1 is connected to the second input end SW, the second input end SW is used to provide voltage to the first boost unit; the first end of the second capacitor C2 is connected to the second end of the second diode D2, and the second end of the second capacitor C2 is grounded.

As can be understood by those skilled in the art, a diode has unidirectional conductivity, that is, the current passing through the diode can only move in one direction, and the current cannot move in the opposite direction. That is, when a forward voltage is applied to the anode of the diode, the diode is turned on; when a reverse voltage is applied to the anode and the cathode, the diode is cut off. The voltage regulator is a special surface-contact semiconductor silicon diode that has the function of stabilizing voltage. Capacitors can be used in circuits such as resonance, filtering, charging and discharging, and energy storage, and the voltage across the capacitor cannot change suddenly. When the power switch in the circuit is not closed, the capacitor is not charged; when the power switch is closed, the free electrons on the positive plate of the capacitor are attracted by the power supply and pushed to the negative plate. Therefore, the positive plate is positively charged due to the reduction of electrons, and the negative plate is negatively charged due to the gradual increase of the base. A potential difference is generated between the two plates of the capacitor. At this time, the power supply is cut off, and the capacitor can still maintain the charging voltage.

As shown in Figure 4, specifically, in combination with this example, by setting a stable voltage at the first input terminal Vboost, the backlight chip provides a PWM periodic voltage signal through the SW pin for the first boost unit to boost. Optionally, the voltage of the first input terminal Vboost is set to 5V, and the backlight chip provides a voltage signal through the SW pin. At this time, the voltage at the first capacitor C1 and the second capacitor C2 changes, and the voltage at the output terminal of the circuit load changes, achieving a boosting effect and reducing the power loss of the backlight chip. Specifically, at time T1, when the voltage signal at the second input terminal SW is 0V, the voltage at Vboost is close to the DC voltage, that is, the 5V voltage of Vboost directly passes through the first diode D1 and the second diode D2 in sequence to reach the load, that is, to the LED connected in series, to power the LED, and to make the backlight source emit light; on the other hand, the first capacitor C1 and the second capacitor C2 are charged in sequence, and the voltage at the first capacitor C1 and the second capacitor C2 are both 5V. At the beginning of T2, the square wave of SW becomes 5V, and the voltage of the first capacitor C1 becomes 10V. At the end of T2, the voltage at the first capacitor C1 charges the second capacitor C2 on the one hand, and the voltages at the first capacitor C1 and the second capacitor C2 are both 7.5V at this time. On the other hand, it reaches the load through the second diode D2. At the beginning of T3, the square wave of the voltage signal at SW is restored to 0V. Since the voltage at the first capacitor C1 is provided by the SW pin of the backlight chip, when the voltage at SW is 0, the voltage at the first capacitor C1 is lost. At this time, the voltage at the first capacitor C1 is only 2.5V. Since the second end of the second capacitor C2 is connected to the first end of the second diode D2, according to the unidirectional conductivity of the diode, the voltage at the second capacitor C2 will not be lost and remain at 7.5V. At the end of T3, the voltage of the second capacitor C2 reaches the load and supplies power to the LED. Since the voltage at Vboost is a stable voltage, that is, the voltage of Vboost will charge the first capacitor C1, so that the voltage at the first capacitor C1 is restored to 5V. At the beginning of T4, the voltage of the second input terminal SW reaches 5V, and the voltage value of the negative plate of the first capacitor C1 is 10V. At this time, the first capacitor C1 reaches the load through the second diode D2 to power the LED lamp, and charges the second capacitor C2 on the other hand. At the end of T4, the voltages at the first capacitor C1 and the second capacitor C2 are both 8.8V. When the voltage of the second input terminal SW is restored to 0V at the next moment, the first capacitor C1 and the second capacitor C2 repeat the above working state until the voltage value at the second capacitor C2 reaches 10V. At this time, the voltage at the output terminal is the sum of the voltage value of the first input terminal Vboost and the voltage value of the second input terminal SW, that is, the voltage value of the output terminal is twice the voltage value of the first input terminal Vboost. At this time, the hardware circuit achieves a double boost effect.

In the implementation scheme of the embodiment of the present application, the voltage at the first diode D1 is a constant value, and the first input terminal Vboost charges and discharges the first capacitor C1 so that the output terminal voltage is equal to twice the voltage of the first input terminal Vboost, and in the boosting process, the hardware circuit does not require the participation of the control signal of the backlight chip circuit, and realizes imperceptible boosting for the display screen or LED lamp, reduces backlight loss, and reduces production costs, as shown in Figure 5, which is a waveform diagram of the simulation result of the backlight circuit of this embodiment.

The embodiment of the present application conducts a comparative experiment by using the boost circuit of the prior art and the hardware circuit of the present application on the same hardware device. In the comparative experiment of this embodiment, 6 LED lights are connected to the boost circuit of the prior art and the hardware circuit of the present application. The experimental results of the boost circuit of the prior art are shown in Table 1, and the experimental results of the hardware circuit of the embodiment of the present application are shown in Table 2.

Table 1

Table 2

Embodiment 3

As shown in FIG6 , the hardware circuit further includes a first inductor L1, a third diode D3, a third capacitor C3 and a fourth capacitor C4; wherein, a first end of the first inductor L1 is connected to a third input terminal Vin, and the third input terminal Vin is used to provide voltage to the hardware circuit, and a second end of the first inductor L1 is connected to a first end of the third diode D3; a second end of the third diode D3 is connected to a first end of the first diode D1; a first end of the fourth capacitor C4 is respectively connected to a second end of the third diode D3 and a first end of the first diode D1, and a second end of the fourth capacitor C4 is grounded; a node of the first end of the fourth capacitor C4, the second end of the third diode D3 and the first end of the first diode D1 is the first input terminal Vboost; a first end of the third capacitor C3 is connected to a second end of the first inductor L1, and a second end of the third capacitor C3 is grounded.

In the embodiment of the present application, the fourth capacitor C4 is used to filter out the noise at Vboost, which can effectively improve the voltage stabilization effect of the circuit. The backlight chip provides a voltage signal square wave to the hardware circuit through the SW pin. The hardware circuit achieves a boosting effect by setting a stable voltage at the first input terminal Vboost and providing a PWM periodic voltage signal at the second input terminal SW. The charging and discharging of the first capacitor C1 and the second capacitor C2 are utilized to enable the hardware circuit to achieve imperceptible boosting. There is no need to participate in the boosting process through the control signal of the backlight chip. At the same time, the boosting efficiency is improved and the power loss of the backlight chip is reduced.

Embodiment 4

As shown in FIG7 , the hardware circuit further includes a second inductor L2 and a fifth capacitor C5; a first end of the second inductor L2 is connected to a first end of the first inductor L1, and a second end of the second inductor L2 is connected to a first end of the third diode D3; a first end of the fifth capacitor C5 is respectively connected to the second input terminal SW and a first end of the second inductor L2, and a second end of the fifth capacitor C5 is grounded.

As those skilled in the art can understand, the characteristic of an inductor is to keep the current on both sides of it unchanged. The inductor and the capacitor together form an LC filter circuit. The inductor can suppress interference signals and obtain a purer DC current at the output end.

Specifically, in combination with the present embodiment, the second input terminal SW is connected to the SW pin of the backlight chip. After SW is turned on and before it is turned off, that is, there is a voltage turned on at the second input terminal SW, and the voltage across the fifth capacitor C5 is 0V at this time; in the process of SW being turned off, that is, there is no voltage turned on at the second input terminal SW, and in combination with FIG. 1 and FIG. 7, the voltage across the second input terminal SW changes at this time. Since the voltage across the capacitor cannot change suddenly, the input terminal voltage charges the fifth capacitor C5 at this time, and the voltage across the SW is gradually increased, reducing the turn-off loss generated at the SW. At this time, the second inductor L2 oscillates and discharges with the fifth capacitor C5, and discharges the fifth capacitor C5 before the next moment SW is turned on, so that the voltage across the fifth capacitor C5 is 0V, further reducing the backlight loss efficiency. The second inductor L2 added in the present embodiment is used to discharge the fifth capacitor C5 before SW is turned off, thereby avoiding the voltage mutation at both ends of SW when SW is turned off, resulting in excessive turn-off loss, thereby affecting the backlight loss efficiency.

In the embodiment of the present application, the voltage at the output end is twice the voltage at the first input end Vboost, and the first boost unit achieves a double boost effect through the first capacitor C1, the second capacitor C2, the first diode D1 and the second diode D2. At the same time, the fifth capacitor C5 and the second inductor L2 are used to reduce the turn-on and turn-off losses of SW, thereby improving the boost efficiency and further reducing the loss of the backlight circuit.

Embodiment 5

As shown in FIG8 , the hardware circuit further includes a feedback unit, and the feedback unit includes a first feedback circuit and a second feedback circuit; the first end of the first feedback circuit is respectively connected to the node of the second end of the third diode D3, the first end of the first diode D1 and the first end of the fourth capacitor C4, and the second end of the first feedback circuit is connected to a feedback end, and the feedback end is used to receive a feedback signal from the feedback unit; the first end of the second feedback circuit is respectively connected to the second end of the second diode D2 and the first end of the second capacitor C2, and the second end of the second feedback circuit is connected to the feedback end; wherein the first feedback circuit further includes a fourth diode D4, the first end of the fourth diode D4 is connected to the first end of the first feedback circuit, and the second end of the fourth diode D4 is connected to the feedback end.

As can be understood by those skilled in the art, the hardware circuit can be regarded as two parts, the circuit before the first end of the first feedback circuit can be regarded as the first part of the hardware circuit, and the circuit after the first end can be regarded as the second part of the hardware circuit. The first feedback circuit can be understood as a near-end feedback circuit, which is used to respond to the first part of the circuit in advance and feed back the output voltage of the first part of the circuit to the backlight chip; the second feedback circuit can be understood as a far-end feedback circuit, which is used to respond to the second part of the circuit and feed back the output voltage of the output end of the hardware circuit to the backlight chip through the feedback end. The first feedback circuit and the second feedback circuit are used to speed up the response of the hardware circuit, stabilize the loop output of the hardware circuit, enable the first boost unit to quickly boost, achieve a double boost effect, reduce the boost time, and improve the boost efficiency, thereby reducing the power consumption of the backlight circuit.

Embodiment 6

As shown in Figure 9, the hardware circuit also includes at least one second boost unit cascaded with the first boost unit, and the second boost unit includes a fifth diode D5, a sixth diode D6, a first boost capacitor Cin and a first output capacitor Cout; wherein the first end of the fifth diode D5 is connected to the second end of the second diode D2, and the second end of the fifth diode D5 is connected to the first end of the sixth diode D6; the second end of the sixth diode D6 is the output end; the first end of the first boost capacitor Cin is respectively connected to the second end of the fifth diode D5 and the first end of the sixth diode D6, and the second end of the first boost capacitor Cin is connected to the second input end SW, and the second input end SW is used to provide voltage to the first boost unit and the second boost unit; the first end of the first output capacitor Cout is connected to the second end of the sixth diode D6, and the second end of the first output capacitor Cout is grounded.

Specifically, the hardware circuit can cascade multiple second boost units for hardware circuit boosting, improve boosting efficiency, and reduce production costs. In the second boost unit, the fifth diode D5 has the same function as the first diode D1 of the first boost unit, the sixth diode D6 has the same function as the second diode D2 of the first boost unit, the first boost capacitor Cin has the same function as the first capacitor C1 of the first boost unit, and the first output capacitor Cout has the same function as the second capacitor C2 of the first boost unit. The specific working principle of the second boost unit is the same as the working principle of the first boost unit, which will not be repeated here. When the hardware circuit cascades a second boost unit, the hardware circuit can achieve a 4-fold boost effect and reduce the power consumption of the hardware circuit.

In an embodiment of the present application, the first diode D1, the second diode D2, the third diode D3, the fourth diode D4 and the fifth diode D5 are all voltage regulators, which are used to make the voltage of the hardware circuit a stable voltage; the first inductor L1 and the second inductor L2 are fixed inductors, and the first inductor L1 and the second inductor L2 are used for one or more of filtering or resonance.

This embodiment also provides a computer storage medium, in which computer instructions are stored. When the computer instructions are executed on an electronic device, the electronic device executes the above-mentioned related method steps to implement the camera function control method in the above-mentioned embodiment.

This embodiment also provides a computer program product. When the computer program product is run on a computer, the computer is caused to execute the above-mentioned related steps to implement the camera function control method in the above-mentioned embodiment.

In addition, an embodiment of the present application also provides a device, which may specifically be a chip, a component or a module, and the device may include a connected processor and a memory; wherein the memory is used to store computer-executable instructions, and when the device is running, the processor may execute the computer-executable instructions stored in the memory so that the chip executes the camera function control method in the above-mentioned method embodiments.

Among them, the electronic device, computer storage medium, computer program product or chip provided in this embodiment is used to execute the corresponding method provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method provided above and will not be repeated here.

Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

The unit described as a separate component may or may not be physically separated, and the component shown as a unit may be one physical unit or multiple physical units, that is, it may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to perform all or part of the steps of each embodiment method of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program code.

This specification is only for briefly describing the principle structure of the circuit scheme of the present application. Other obviously equivalent transformation methods in the field are also within the protection scope of the present invention, such as increasing the stable voltage at Vboost; cascading multiple groups of second boost units at the output end of the circuit to improve the boost effect, etc.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims (9)

1. The hardware circuit for reducing power consumption of the backlight is characterized by comprising a first boosting unit, wherein the first boosting unit comprises a first diode D1, a second diode D2, a first capacitor C1 and a second capacitor C2;

The first end of the first diode D1 is connected to a first input end Vboost, the first input end Vboost is used for providing voltage for the first boost unit, and the second end of the first diode D1 is connected to the first end of the second diode D2;

The second end of the second diode D2 is an output end;

the first end of the first capacitor C1 is connected with the second end of the first diode D1 and the first end of the second diode D2 respectively; the second end of the first capacitor C1 is connected with a second input end SW, and the second input end SW is used for providing a PWM period voltage signal for the first boosting unit;

The first end of the second capacitor C2 is connected with the second end of the second diode D2, and the second end of the second capacitor C2 is grounded;

The hardware circuit further comprises at least one second boosting unit cascaded with the first boosting unit, wherein the second boosting unit comprises a fifth diode D5, a sixth diode D6, a first boosting capacitor Cin and a first output capacitor Cout;

a first end of the fifth diode D5 is connected to the output end of the first boost unit, a second end of the fifth diode D5 is connected to the first end of the first boost capacitor Cin and the first end of the sixth diode D6, and a second end of the first boost capacitor Cin is connected to the second input end SW; a first end of the first output capacitor Cout is connected with a second end of the sixth diode D6, and a second end of the first output capacitor Cout is grounded;

the hardware circuit further comprises a first inductor L1, a third diode D3, a third capacitor C3 and a fourth capacitor C4;

the first end of the first inductor L1 is connected with a third input end Vin, the third input end Vin is used for providing voltage for the hardware circuit, and the second end of the first inductor L1 is connected with the first end of the third diode D3;

The second end of the third diode D3 is connected with the first end of the first diode D1;

The first end of the fourth capacitor C4 is respectively connected with the second end of the third diode D3 and the first end of the first diode D1, and the second end of the fourth capacitor C4 is grounded;

The node of the first end of the fourth capacitor C4, the second end of the third diode D3, and the first end of the first diode D1 is the first input terminal Vboost;

the first end of the third capacitor C3 is connected to the second end of the first inductor L1, and the second end of the third capacitor C3 is grounded.

2. A backlight power consumption reducing hardware circuit according to claim 1, wherein the hardware circuit further comprises a second inductor L2 and a fifth capacitor C5;

the first end of the second inductor L2 is connected to the second end of the first inductor L1, and the second end of the second inductor L2 is connected to the first end of the third diode D3;

The first end of the fifth capacitor C5 is connected to the second input terminal SW and the first end of the second inductor L2, respectively, and the second end of the fifth capacitor C5 is grounded.

3. A backlight power consumption reducing hardware circuit according to claim 2, wherein the first inductance L1 and the second inductance L2 are fixed inductances, the first inductance L1 and the second inductance L2 being used for one or more of filtering or resonance.

4. The backlight power consumption reduction hardware circuit according to claim 1, wherein the hardware circuit further comprises a feedback unit, the feedback unit comprising a first feedback circuit and a second feedback circuit;

The first end of the first feedback circuit is connected with the second end of the third diode D3, the first end of the first diode D1 and the node of the first end of the fourth capacitor C4 respectively, the second end of the first feedback circuit is connected with a feedback end, and the feedback end is used for receiving a feedback signal of the feedback unit;

the first end of the second feedback circuit is respectively connected with the second end of the second diode D2 and the first end of the second capacitor C2, and the second end of the second feedback circuit is connected with the feedback end;

The first feedback circuit further comprises a fourth diode D4, a first end of the fourth diode D4 is connected with the first end of the first feedback circuit, and a second end of the fourth diode D4 is connected with the feedback end.

5. The backlight power-down hardware circuit according to claim 1, wherein in the second boost unit, the second end of the sixth diode D6 is an output end of the second boost unit;

The second input terminal SW is configured to supply voltages to the first boosting unit and the second boosting unit.

6. A backlight power-down hardware device comprising the backlight power-down hardware circuit of any one of claims 1-5, the hardware device further comprising:

the backlight chip is connected with the first boosting unit and provides PWM periodic voltage signals for the first boosting unit;

And the display device is used for providing a light source for display through the hardware circuit.

7. The backlight power consumption reduction hardware apparatus as set forth in claim 6, wherein the SW pin of the backlight chip is connected to the second input terminal SW of the hardware circuit.

8. The hardware device for reducing power consumption of a backlight according to claim 6, further comprising a feedback unit, wherein a feedback end of the feedback unit is connected to a feedback pin FB of the backlight chip.

9. The backlight power-down hardware apparatus of claim 6, wherein the hardware circuit further comprises at least one second boost unit, the second boost unit being cascaded with the first boost unit.