CN116704961A - Backlight power consumption reduction hardware circuit and device - Google Patents
Backlight power consumption reduction hardware circuit and device Download PDFInfo
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- CN116704961A CN116704961A CN202211274803.7A CN202211274803A CN116704961A CN 116704961 A CN116704961 A CN 116704961A CN 202211274803 A CN202211274803 A CN 202211274803A CN 116704961 A CN116704961 A CN 116704961A
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- 230000008569 process Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 229920001621 AMOLED Polymers 0.000 description 3
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- 238000010168 coupling process Methods 0.000 description 3
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- 239000004973 liquid crystal related substance Substances 0.000 description 2
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/165—Controlling the light source following a pre-assigned programmed sequence; Logic control [LC]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Liquid Crystal Display Device Control (AREA)
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
Technical Field
The application relates to the field of circuit control, in particular to a hardware circuit and a device for reducing power consumption of backlight.
Background
At present, the display screen mainly uses an LCD, but the LCD can not emit light, so that a backlight source is needed for displaying pictures, and the common backlight source is generally composed of a plurality of LED lamps, and the number of the LED lamps is determined by the size of the screen.
With the gradual increase of the light efficiency of the LED, the LED has long service life and does not contain Hg element which has great damage to the environment. Because of these advantages of LEDs, they are increasingly used in the field of display screen backlights, but because LED lamps need to be designed in series in more cases, there are two problems when the backlight chip driver driving circuit performs voltage doubling conversion: 1. the chip is required to be used for control, so that the production cost is high; 2. the voltage doubling efficiency is low, and the system power loss is high.
In the prior art, a conventional boost circuit is boosted by using a MOS transistor, and the boost chip circuit is shown in fig. 1. In the existing boost circuit, a boost chip needs to be controlled to be powered on and off by a singlechip, when a MOS tube is conducted, vin charges an inductor L1, and a load LED is powered by Cout freewheel at the moment; when the MOS is disconnected, the polarities of the voltages at the left end and the right end of the inductor L1 are suddenly changed, and Vout=vin+VL-VD 1 is boosted.
Disclosure of Invention
The application mainly aims to provide a backlight power consumption reduction hardware circuit, which aims to solve the technical problem that the power consumption is high due to low voltage doubling efficiency when the existing boost chip is boosted.
In order to achieve the technical purpose, the application adopts the following technical scheme:
the application discloses 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 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 to a second input end SW, and the second input end SW is used for providing a voltage to the first boosting 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.
In an embodiment of the present application, 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 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.
In an embodiment of the present application, 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;
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.
In an embodiment of the present application, 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.
In an embodiment of the present application, the hardware circuit further includes a feedback unit including 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.
In an embodiment of the present application, the hardware circuit further includes at least one second boost unit cascaded with the first boost unit, 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 with the second end of the second diode D2, and the second end of the fifth diode D5 is connected with 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 with the second end of the fifth diode D5 and the first end of the sixth diode D6 respectively, the second end of the first boost capacitor Cin is connected with the second input end SW, and the second input end SW is used for providing voltages for 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.
The application also provides a backlight power consumption reduction hardware device based on any one of the above, which comprises:
a hardware circuit including a first boost unit;
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.
In an embodiment of the present application, the SW pin of the backlight chip is connected to the second input terminal SW of the hardware circuit.
In an embodiment of the present application, the hardware device further includes a feedback pin FB of the backlight chip connected to a feedback end of the feedback unit.
In an embodiment of the present application, 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 hardware circuit with the power consumption reduced by the backlight circuit has the advantages that the hardware circuit achieves the double boosting effect through the first boosting unit, the first boosting unit is provided with voltage by the first input end Vboost and the second input end SW, so that the display device is not subjected to perceived boosting, the control signal of the backlight chip is not required to participate in the boosting process, the power consumption of the hardware circuit is reduced, the boosting efficiency is improved, and the production cost is reduced.
Drawings
FIG. 1 is a circuit diagram of a chip of a conventional backlight circuit;
FIG. 2 is a circuit diagram of a chip of a hardware circuit for reducing power consumption of a backlight according to an embodiment of the present application;
FIG. 3 is a schematic circuit diagram of a hardware circuit for reducing power consumption of a backlight according to an embodiment of the present application;
FIG. 4 is a timing diagram of the circuit diagram of FIG. 3;
FIG. 5 is a simulated waveform diagram of the schematic circuit diagram of FIG. 3;
FIG. 6 is a schematic diagram II of a hardware circuit for reducing power consumption of a backlight according to an embodiment of the present application;
FIG. 7 is a schematic diagram III of a hardware circuit for reducing power consumption of a backlight according to an embodiment of the present application;
FIG. 8 is a schematic diagram of a hardware circuit for reducing power consumption of a backlight according to an embodiment of the present application;
fig. 9 is a schematic circuit diagram of a hardware circuit for reducing power consumption of a backlight according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described with reference to the accompanying drawings.
The terms first and second and the like in the description, the claims and the drawings of the present application are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprising," "including," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion. Such as a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to the list of steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases 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. Those skilled in the art will appreciate explicitly and implicitly that the described embodiments of the application may be combined with other embodiments.
In the present application, "at least one (item)" means one or more, "a plurality" means two or more, "at least two (items)" means two or three and more, "and/or" for describing an association relationship of an association object, and three kinds of relationships may exist, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of (a) or a similar expression thereof means any combination of these items. For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c".
In the embodiment of the present application, the backlight power consumption reduction hardware circuit may be applied to an electronic device, and it may be understood that the electronic device may be a mobile phone, a wearable device, a tablet computer, a computer with a wireless transceiver function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, or the like, which is not specifically limited herein.
Example 1
The application provides a backlight power consumption reduction hardware device based on any one of the above, as shown in fig. 2, fig. 2 is a circuit diagram of the hardware device provided by an embodiment of the application, the hardware device comprises a hardware circuit, a backlight chip and a display device, the hardware circuit comprises a first boost unit, the backlight chip is connected with the first boost unit, and the backlight chip provides a PWM period voltage signal for the first boost unit; the display device provides a light source for display through a hardware circuit.
As will be appreciated by those skilled in the art, the display screen includes a display panel. The display panel may employ a liquid crystal display (liquid crystal display, LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED) or an active-matrix organic light-emitting diode (matrixorganic light emitting diode), a flexible light-emitting diode (flex), a mini, a Micro led, a Micro-OLED, a quantum dot light-emitting diode (quantum dot lightemitting diodes, QLED), or the like. In some embodiments, the electronic device may include 1 or N displays, N being 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.
Example two
As shown in fig. 3, fig. 3 is a circuit for reducing power consumption of a backlight according to an embodiment of the present application, where the first boost unit includes 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 second end of the first diode D1 is connected with the first end of the second diode D2; the second end of the first capacitor C1 is connected to a second input end SW, and the second input end SW is used for providing a voltage to the first boosting 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 will be appreciated by those skilled in the art, the diode has unidirectional conductivity, i.e., current through the diode can only move in one direction and current cannot move in the opposite direction. When a forward voltage is applied to the anode of the diode, the diode is conducted; when reverse voltages are applied to the anode and cathode, the diode turns off. The voltage stabilizing tube is a special surface contact type semiconductor silicon diode and has the function of stabilizing voltage. The capacitor can be used in circuits such as resonance, filtering, charge and discharge, energy storage and the like, the voltage at two ends of the capacitor cannot be suddenly changed, and when a power switch in the circuit is not closed, the capacitor is not electrified; when the power switch is turned on, free electrons on the positive plate of the capacitor are attracted by the power supply and pushed to the negative plate, so that the positive plate is positively charged due to the reduction of electrons, 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, the power supply is cut off, and the capacitor can still maintain charging voltage.
As shown in fig. 4, specifically, in conjunction with the present example, by setting the stable voltage at the first input terminal Vboost, the backlight chip provides the PWM period voltage signal for the first boosting unit to boost voltage through the SW pin. Optionally, the voltage of the first input end Vboost is set to 5V, 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 then the voltage at the output end of the circuit load changes, so as to achieve a boosting effect and reduce the power loss of the backlight chip. Specifically, at the time T1, when the voltage signal at the second input end SW is 0V, the voltage at the Vboost is close to the dc voltage, that is, the 5V voltage of the Vboost directly passes through the first diode D1 and the second diode D2 in turn to reach the load, that is, reach the LED in series, so as to supply power to the LED, and make the backlight source emit light; on the other hand, the first capacitor C1 and the second capacitor C2 are charged sequentially, and at this time, voltages at the first capacitor C1 and the second capacitor C2 are 5V. At the beginning of T2, the square wave becomes 5V at SW, the voltage of the first capacitor C1 becomes 10V, and at the end of T2, the voltage at the first capacitor C1 charges the second capacitor C2 on the one hand, and at this time, the voltages at the first capacitor C1 and the second capacitor C2 are both 7.5V, and on the other hand, reach 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 only remains 2.5V, and the second end of the second capacitor C2 is connected with the first end of the second diode D2, according to the unidirectional conductivity of the diode, the voltage at the second capacitor C2 is not lost, and remains at 7.5V, at the end of T3, at this time, the voltage at the second capacitor C2 reaches the load to supply power to the LED, and since the voltage at Vboost is a stable voltage, that is, the voltage at Vboost charges the first capacitor C1, so that the voltage at the first capacitor C1 is restored to 5V. At the beginning of the T4, the voltage of the second input end SW reaches 5V, at this time, 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 supply power to the LED lamp, and at the end of the T4, the voltages at the first capacitor C1 and the second capacitor C2 are 8.8V. When the voltage of the second input end SW is restored to 0V at the next moment, the first capacitor C1 and the second capacitor C2 repeat the above working states until the voltage value at the second capacitor C2 reaches 10V, and then the voltage at the output end is added to the voltage value of the first input end Vboost and the voltage value of the second input end SW, that is, the voltage value of the output end is twice the voltage value of the first input end Vboost, and the hardware circuit achieves the double boosting effect.
In the embodiment of the application, the voltage at the first diode D1 is a constant value, the voltage at the output end of the first input end Vboost is equal to 2 times of the voltage at the first input end Vboost by charging and discharging the first capacitor C1, and in the boosting process, the hardware circuit does not need to participate in a control signal of a backlight chip circuit, so that no perceived boosting is realized on a display screen or an LED lamp, the backlight loss is reduced, and meanwhile, the production cost is reduced, and as shown in fig. 5, fig. 5 is a waveform diagram of a simulation result of the backlight circuit of the embodiment.
In the embodiment of the application, the comparison experiment is performed on the same hardware device by adopting the prior art booster circuit and the hardware circuit of the application, and in the comparison experiment of the embodiment, the prior art booster circuit and the hardware circuit of the application are connected with 6 LED lamps, the experimental result of the prior art booster circuit is shown in table 1, and the experimental result of the hardware circuit of the embodiment of the application is shown in table 2.
TABLE 1
TABLE 2
Example III
As shown in fig. 6, 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 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.
In the embodiment of the application, the fourth capacitor C4 is used for filtering noise at the Vboost, so that the voltage stabilizing effect of the circuit can be effectively improved, the backlight chip provides a voltage signal square wave for the hardware circuit through the SW pin, the hardware circuit achieves the boosting effect by setting stable voltage at the first input end Vboost and providing PWM period voltage signals at the second input end SW, the hardware circuit achieves non-perception boosting by utilizing the charging and discharging of the first capacitor C1 and the second capacitor C2, the boosting process is not needed to be participated through the control signal of the backlight chip, the boosting efficiency is improved, and the power loss of the backlight chip is reduced.
Example IV
As shown in fig. 7, 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; 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.
As one skilled in the art can understand, the inductor is characterized by keeping the current at two sides of the inductor unchanged, the inductor and the capacitor form an LC filter circuit together, and the inductor can play a role in suppressing interference signals, so that the output end obtains purer direct current.
Specifically, in combination with the embodiment, the second input end SW is connected to the SW pin of the backlight chip, and after the SW is turned on, before the SW is turned off, that is, there is a voltage on at the second input end SW, and at this time, the voltage at two ends of the fifth capacitor C5 is 0V; in the SW turn-off process, that is, the second input end SW is not turned on, as shown in fig. 1 and 7, the voltage at two ends of the second input end SW changes, and since the voltage at two ends of the capacitor cannot be suddenly changed, the voltage at two ends of the SW charges the fifth capacitor C5, the voltage at two ends of the SW is gradually increased, the turn-off loss generated at the SW is reduced, at this time, the second inductor L2 and the fifth capacitor C5 are oscillated to discharge together, and the voltage at two ends of the fifth capacitor C5 is 0V before the next moment SW is turned on, so that the backlight loss efficiency is further reduced. The added second inductor L2 in this embodiment is used to discharge the fifth capacitor C5 before the SW is turned off, so that it is avoided that when the SW is turned off, the voltage across the SW suddenly changes to cause the turn-off loss to be too high, thereby affecting the backlight loss efficiency.
In the embodiment of the application, the voltage of the output end is twice the voltage of the first input end Vboost, the first boosting unit realizes a double boosting effect through the first capacitor C1, the second capacitor C2, the first diode D1 and the second diode D2, and meanwhile, the on-off loss of SW is reduced through the fifth capacitor C5 and the second inductor L2, the boosting efficiency is improved, and the loss of a backlight circuit is further reduced.
Example five
As shown in fig. 8, the hardware circuit further includes a feedback unit including 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.
As will be appreciated by those skilled in the art, a hardware circuit may be considered to be two parts, with circuitry preceding the first end of the first feedback circuit being considered to be a first part of the hardware circuit and circuitry following the first end being considered to be a second part of the hardware circuit. The first feedback circuit can be understood as a near-end feedback circuit, and is used for responding to the first partial circuit in advance and feeding back the output voltage of the first partial circuit to the backlight chip; the second feedback circuit can be understood as a remote feedback circuit and is used for responding to the second partial circuit, feeding back the output voltage of the output end of the hardware circuit back to the backlight chip through the feedback end, the first feedback circuit and the second feedback circuit are used for accelerating the response of the hardware circuit, stabilizing the loop output of the hardware circuit, enabling the first boosting unit to boost the voltage rapidly, achieving the double boosting effect, reducing the boosting time, improving the boosting efficiency and further reducing the power consumption of the backlight circuit.
Example six
As shown in fig. 9, the hardware circuit further includes at least one second boost unit cascaded with the first boost unit, where 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 with the second end of the second diode D2, and the second end of the fifth diode D5 is connected with 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 with the second end of the fifth diode D5 and the first end of the sixth diode D6 respectively, the second end of the first boost capacitor Cin is connected with the second input end SW, and the second input end SW is used for providing voltages for 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 be cascaded with a plurality of second boosting units for boosting the hardware circuit, so that the boosting efficiency is improved, and the production cost is reduced. In the second boost unit, the fifth diode D5 and the first diode D1 of the first boost unit function identically, the sixth diode D6 and the second diode D2 of the first boost unit function identically, the first boost capacitor Cin and the first capacitor C1 of the first boost unit function identically, and the first output capacitor Cout and the second capacitor C2 of the first boost unit function identically. The specific working principle of the second boost unit is the same as that of the first boost unit, and will not be described here again. When the hardware circuit is cascaded with a second boosting unit, the hardware circuit can achieve 4 times of boosting effect, and the power consumption of the hardware circuit is reduced.
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-stabilizing diodes for making 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.
The present embodiment also provides a computer storage medium having stored therein computer instructions which, when executed on an electronic device, cause the electronic device to execute the above-described related method steps to implement the camera function control method in the above-described embodiments.
The present embodiment also provides a computer program product which, when run on a computer, causes the computer to perform the above-described related steps to implement the camera function control method in the above-described embodiments.
In addition, embodiments of the present application also provide an apparatus, which may be embodied as a chip, component or module, which may include a processor and a memory coupled to each other; the memory is used for storing computer-executable instructions, and when the device is running, the processor can execute the computer-executable instructions stored in the memory, so that the chip executes the camera function control method in each method embodiment.
The electronic device, the computer storage medium, the computer program product, or the chip provided in this embodiment are used to execute the corresponding methods provided above, so that the beneficial effects thereof can be referred to the beneficial effects in the corresponding methods provided above, and will not be described herein.
From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to implement all or part of the functions described above.
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and the parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated unit may be stored in a readable storage medium if implemented in the form of a software functional unit and sold or used as a stand-alone product. Based on such understanding, the technical solution of the embodiments of the present application may be essentially or a part contributing to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions for causing a device (may be a single-chip microcomputer, a chip or the like) or a processor (processor) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The present disclosure is only for briefly explaining the principle architecture of the circuit scheme of the present application, and other obvious equivalent transformation ways in the art are also within the protection scope of the present application, such as increasing the stable voltage at Vboost; and a plurality of groups of second boosting units are cascaded at the output end of the circuit so as to improve boosting effect and the like.
Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present application without departing from the spirit and scope of the technical solution of the present application.
Claims (10)
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 to a second input end SW, and the second input end SW is used for providing a voltage to the first boosting 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.
2. The backlight power consumption reduction hardware circuit according to claim 1, further comprising 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.
3. A backlight power consumption reducing hardware circuit according to claim 2, 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.
4. A backlight power consumption reducing hardware circuit according to claim 3, wherein 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.
5. The backlight power consumption reduction hardware circuit according to claim 2, 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.
6. The backlight power-down hardware circuit according to claim 1, further comprising at least one second boost unit cascaded with the first boost unit, the second boost unit comprising 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 with the second end of the second diode D2, and the second end of the fifth diode D5 is connected with 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 with the second end of the fifth diode D5 and the first end of the sixth diode D6 respectively, the second end of the first boost capacitor Cin is connected with the second input end SW, and the second input end SW is used for providing voltages for 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.
7. A backlight power consumption reduction hardware device based on any one of claims 1-6, wherein the hardware device comprises:
a hardware circuit including a first boost unit;
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.
8. The backlight power consumption reduction hardware apparatus as set forth in claim 7, wherein the SW pin of the backlight chip is connected to the second input terminal SW of the hardware circuit.
9. The hardware device for reducing power consumption of a backlight according to claim 7, further comprising a feedback pin FB of the backlight chip connected to a feedback terminal of the feedback unit.
10. The backlight power-down hardware apparatus of claim 7, wherein the hardware circuit further comprises at least one second boost unit, the second boost unit being cascaded with the first boost unit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211274803.7A CN116704961B (en) | 2022-10-18 | Backlight power consumption reduction hardware circuit and device | |
| PCT/CN2023/115398 WO2024082830A1 (en) | 2022-10-18 | 2023-08-29 | Backlight power consumption reduction hardware circuit and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211274803.7A CN116704961B (en) | 2022-10-18 | Backlight power consumption reduction hardware circuit and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116704961A true CN116704961A (en) | 2023-09-05 |
| CN116704961B CN116704961B (en) | 2024-07-05 |
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