CN110534055B - Air conditioner display panel and air conditioner - Google Patents
Air conditioner display panel and air conditioner Download PDFInfo
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- CN110534055B CN110534055B CN201910822299.1A CN201910822299A CN110534055B CN 110534055 B CN110534055 B CN 110534055B CN 201910822299 A CN201910822299 A CN 201910822299A CN 110534055 B CN110534055 B CN 110534055B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
Abstract
The invention discloses an air conditioner display panel and an air conditioner, wherein the air conditioner display panel comprises a display module and a display control panel, the display control panel is provided with a direct current power supply end, a control circuit, a power circuit and a brightness detection circuit, the brightness detection circuit is used for detecting the ambient brightness, when the ambient brightness is less than or equal to a preset brightness lower limit value, the control circuit determines that the current environment is a dark environment, and controls the power circuit to output the minimum value of the working voltage interval of the display module to control the display module to display so that the display module displays the lowest brightness and presents a slightly bright state, when the ambient brightness is greater than or equal to a preset brightness upper limit value, the control circuit determines that the current environment is a bright environment, controls the power circuit to output the maximum value of the working voltage interval of the display module to control the display module to display so that the display module presents the highest brightness, therefore, the problem that the user cannot know the working state of the air conditioner under the condition that the current environment is a dark environment is solved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner display panel and an air conditioner.
Background
The display module of the indoor unit of the air conditioner has a night anti-glare function, and the display module can be turned off after the MCU detects the change of the resistance value of the photosensitive resistor after the indoor environment of a user is turned off at night, so that the influence of light pollution on the rest of the user is prevented.
But display module assembly shows that luminance is fixed, only switches two kinds of states, can't be according to the luminance of ambient light brightness dynamic adjustment display module assembly to can only close the demonstration of air conditioner under dark environment at night, lead to the user can't learn the operating condition of air conditioner.
Disclosure of Invention
The invention mainly aims to provide an air conditioner display panel, which aims to solve the problem that a user cannot know the working state of an air conditioner in a dark environment at night.
In order to achieve the above object, the present invention provides an air conditioner display panel comprising:
a display module;
the display control panel is provided with a direct current power supply end, a control circuit, a power supply circuit and a brightness detection circuit, the direct current power supply end, the power supply end of the control circuit, the power supply input end of the power supply circuit and the power supply end of the brightness detection circuit are interconnected, the controlled end of the power supply circuit is connected with the control end of the control circuit, and the signal end of the brightness detection circuit is connected with the signal end of the control circuit;
the brightness detection circuit is used for detecting the ambient brightness and outputting a brightness detection signal to the control circuit;
the control circuit is used for determining that the current environment is a dark environment when the ambient brightness is less than or equal to a preset brightness lower limit value, and controlling the power supply circuit to output the minimum value of the working voltage interval of the display module to control the display module to display; and
and when the ambient brightness is greater than or equal to the preset brightness upper limit value, determining that the current environment is a bright environment, and controlling the power supply circuit to output the maximum value of the working voltage interval of the display module to control the display module to display.
In an embodiment, the control circuit is further configured to control the voltage output to the display module by the power circuit according to the brightness detection signal when the ambient brightness is greater than a preset brightness lower limit and less than a preset brightness upper limit, and control the display brightness of the display module to correspondingly change along with a brightness change trend of the ambient brightness, so that a difference between the display brightness of the display module and the ambient brightness is lower than a preset brightness value.
In one embodiment, the display module comprises a plurality of groups of display units, each display unit comprises a switch circuit and a luminous body, a power input end of each switch circuit is respectively connected with a power output end of the power circuit, a controlled end of each switch circuit is respectively connected with a control end of the control circuit, and a power output end of the switch circuit is connected with a power end of the luminous body;
the switch circuit is used for being correspondingly switched on or switched off according to the control signal output by the control circuit, so that the power supply circuit outputs corresponding voltage to the luminous body;
and the luminous body is used for correspondingly lightening according to the voltage output by the power supply circuit.
In one embodiment, the light emitter is a light emitting diode.
In one embodiment, the switching circuit comprises a first resistor, a second resistor and a switching tube;
the power input end of the switch tube, the first end of the first resistor and the power output end of the power circuit are interconnected, the second end of the first resistor, the first end of the second resistor and the controlled end of the switch tube are interconnected, and the second end of the second resistor is the controlled end of the switch circuit.
In one embodiment, the brightness detection circuit comprises a third resistor, a fourth resistor, a photoresistor and a first capacitor;
the first end of the photoresistor, the first end of the third resistor and the direct current power supply end are interconnected, the second end of the photoresistor, the second end of the third resistor, the first end of the fourth resistor and the first end of the first capacitor are interconnected, a connection node of the photoresistor, the second end of the third resistor, the first end of the fourth resistor and the first end of the first capacitor is a signal end of the brightness detection circuit, and the second end of the fourth resistor and the second end of the first capacitor are both grounded.
In one embodiment, the power supply circuit includes a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second capacitor, a third capacitor, an operational amplifier, a first inductor and a power supply chip;
the first end of the fifth resistor is a controlled end of the power circuit, the second end of the fifth resistor, the first end of the sixth resistor and the inverting input end of the operational amplifier are interconnected, the second end of the sixth resistor, the output end of the operational amplifier and the feedback pin of the power chip are connected, the power input end of the power chip, the first end of the seventh resistor and the direct-current power end are interconnected, the second end of the seventh resistor, the first end of the second capacitor and the functional pin of the power chip are interconnected, the ground terminal of the power chip and the second end of the second capacitor are both grounded, the output end of the power chip, the first end of the third capacitor and the first end of the first inductor are interconnected, the second end of the third capacitor is connected with the bootstrap voltage input end of the power chip, the second end of the first inductor is connected with the first end of the eighth resistor and the connection node is the power supply electrical node And the second end of the eighth resistor, the first end of the ninth resistor and the first end of the tenth resistor are interconnected, the second end of the ninth resistor is grounded, and the second end of the tenth resistor is connected with the positive input end of the operational amplifier.
In one embodiment, the power supply circuit comprises a fourth capacitor, a fifth capacitor, a first diode, a second inductor and an NMOS tube;
the first end of the fourth capacitor is connected with the drain electrode of the NMOS tube, the connection node is the power input end of the power circuit, the grid electrode of the NMOS tube is the controlled end of the power circuit, the source electrode of the NMOS tube, the first end of the first diode and the first end of the second inductor are interconnected, the second end of the second inductor is connected with the first end of the fifth capacitor, and the second end of the fourth capacitor and the second end of the fifth capacitor are both grounded.
In an embodiment, a voltage sampling circuit is further arranged on the display control board, a signal input end of the voltage sampling circuit is connected with an output end of the power supply circuit, and a signal output end of the voltage sampling circuit is connected with a signal end of the control circuit;
the voltage sampling circuit is used for sampling the output voltage of the power supply circuit and outputting a voltage sampling signal to the control circuit;
the control circuit is also used for controlling the power supply circuit to work at constant current according to the voltage sampling signal.
The invention also provides an air conditioner which comprises the air conditioner display panel.
The technical proposal of the invention adopts the display module and the display control panel to form the display panel of the air conditioner, the display control panel is provided with a direct current power supply end, a control circuit, a power supply circuit and a brightness detection circuit, the brightness detection circuit is used for detecting the ambient brightness, when the ambient brightness is less than or equal to the preset brightness lower limit value, the control circuit determines that the current environment is a dark environment, and outputs a control signal to control the power circuit to output the minimum value of the working voltage interval of the display module to control the display module to display, so that the display module displays the minimum brightness and presents a slightly bright state, when the ambient brightness is greater than or equal to the preset brightness upper limit value, the control circuit determines that the current environment is a bright environment, and the output control signal controls the power circuit to output the maximum value of the working voltage interval of the display module to control the display module to display so that the display module is in the highest brightness display. Therefore, the problem that the user cannot know the working state of the air conditioner under the condition that the current environment is a dark environment is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of an embodiment of a display panel of an air conditioner according to the present invention;
FIG. 2 is a schematic block diagram of a display module of an embodiment of a display panel of an air conditioner according to the present invention
FIG. 3 is a schematic circuit diagram of an embodiment of a control panel of an air conditioner according to the present invention;
fig. 4 is a schematic circuit diagram of another embodiment of the control panel of the air conditioner of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the descriptions relating to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is: the method comprises three parallel schemes, wherein the scheme is taken as an A/B (A/B) as an example, the scheme comprises the scheme A, the scheme B or the scheme A and the scheme B simultaneously satisfy, in addition, the technical schemes between the various embodiments can be combined with each other, but the technical schemes must be based on the realization of the technical schemes by a person skilled in the art, and when the technical schemes are mutually contradictory or can not be realized, the combination of the technical schemes is not considered to exist, and the protection scope of the invention is not within the protection scope of the invention.
The invention provides an air conditioner display panel.
As shown in fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a display panel of an air conditioner according to the present invention, in the embodiment, the display panel of the air conditioner includes:
a display module 200;
the display control panel 100 is provided with a direct current power supply end VCC, a control circuit 20, a power supply circuit 10 and a brightness detection circuit 30, wherein the direct current power supply end VCC, the power supply end of the control circuit 20, the power supply input end of the power supply circuit 10 and the power supply end of the brightness detection circuit 30 are interconnected, a controlled end of the power supply circuit 10 is connected with the control end of the control circuit 20, and a signal end of the brightness detection circuit 30 is connected with the signal end of the control circuit 20;
a brightness detection circuit 30 for detecting the ambient brightness and outputting a brightness detection signal to the control circuit 20;
the control circuit 20 is configured to determine that the current environment is a dark environment when the ambient brightness is less than or equal to the preset brightness lower limit, and control the power supply circuit 10 to output the minimum value of the working voltage interval of the display module 200 to control the display module 200 to display; and
when the ambient brightness is greater than or equal to the preset brightness upper limit, it is determined that the current environment is a bright environment, and the power circuit 10 is controlled to output the maximum value of the working voltage interval of the display module 200 to control the display module 200 to display.
In this embodiment, the display module 200 is used to display the working state of the air conditioner, such as the current cooling/heating temperature, the wind power, the wind sweeping mode, and the like, for example, a display panel, a display screen, a nixie tube, and the like.
The power circuit 10 is configured to output dc voltages of different voltage levels according to the control signal of the control circuit 20, so that the display module 200 is turned on according to the dc voltages of different levels, and the power circuit 10 may be a switching power module, a buck-boost circuit, a power chip, and the like, which is not limited herein.
The output voltage of the power circuit 10 is within an operating voltage interval to drive the display module 200 to be normally lit, when the operating voltage interval is outside, the display module 200 does not work, works abnormally, or the brightness is too bright to check the working state, and the operating voltage interval range can be correspondingly selected according to the type of the display module 200, for example, 1.8V to 5V.
When the brightness detection signal received by the control circuit 20 indicates that the brightness of the current environment is less than or equal to the preset brightness lower limit value, it is determined that the current environment is in a dark environment, for example, the night condition, the control circuit 20 outputs a control signal to the power circuit 10 to control the power circuit 10 to output the lower limit value of the working voltage interval, for example, 1.8V, the display module 200 displays at the lowest brightness under the driving of the voltage and presents a slightly bright state, therefore, when a user has a rest in the environment, the working state displayed in the display module 200 can be viewed, and meanwhile, the slightly bright light cannot cause dazzling to influence sleep, so that the problem that the user cannot know the working state of the air conditioner in the dark night environment is solved.
Meanwhile, when the current ambient brightness is greater than or equal to the preset brightness upper limit value, it indicates that the current environment is a bright environment, for example, daytime conditions, the control circuit 20 outputs a control signal to the power circuit 10 to control the power circuit 10 to output an upper limit value of a working voltage interval, for example, 5V, and the display module 200 displays at the highest brightness under the driving of the voltage.
When the ambient brightness is between the lower limit and the upper limit of the preset brightness, the control circuit 20 may output a control signal to control the power circuit 10 to output a constant voltage value or a voltage value varying with the ambient brightness, for example, the power circuit 10 constantly outputs 3.3V to the display module 200 to make the display module 200 constantly bright, or control the display brightness of the display module 200 to vary with the ambient brightness, for example, within a range of 1.8-5V, the specific control method is not limited, and the control may be performed according to actual requirements.
The technical scheme of the invention is that an air conditioner display panel is composed of a display module 200 and a display control panel 100, the display control panel 100 is provided with a direct current power supply end VCC, a control circuit 20, a power supply circuit 10 and a brightness detection circuit 30, the brightness detection circuit 30 is used for detecting the ambient brightness, when the ambient brightness is less than or equal to the lower limit value of the preset brightness, the control circuit 20 determines that the current environment is the dark environment, and outputs a control signal to control the power supply circuit 10 to output the minimum value of the working voltage interval of the display module 200 to control the display module 200 to display, so that the display module 200 displays the minimum brightness and presents the micro-brightness state, when the ambient brightness is greater than or equal to the upper limit value of the preset brightness, the control circuit 20 determines that the current environment is the bright environment, outputs the control signal to control the power supply circuit 10 to output the maximum value of the working voltage interval of the display module 200 to control the display module 200 to display, so that the display module 200 is displayed with the highest brightness, thereby solving the problem that the user cannot know the working state of the air conditioner in the dark environment of the current environment.
In an embodiment, in order to reduce the power consumption and the glare problem, the control circuit 20 is further configured to control the voltage output from the power circuit 10 to the display module 200 according to the brightness detection signal when the ambient brightness is greater than the preset brightness lower limit and less than the preset brightness lower limit, and control the display brightness of the display module 200 to correspondingly change along with the brightness variation trend of the ambient brightness, so that the difference between the display brightness of the display module 200 and the ambient brightness is lower than the preset brightness value.
In this embodiment, when the ambient brightness changes from the lower limit value to the upper limit value of the preset brightness, the control circuit 20 outputs a control signal to the power circuit 10, so that the power circuit 10 outputs a changing dc voltage to the display module 200, and further controls the display brightness of the display module 200 to change along with the brightness change of the ambient brightness, when the ambient brightness becomes high, the brightness of the display module 200 correspondingly becomes high, when the ambient brightness becomes low, the brightness of the display module 200 correspondingly becomes low, and the difference between the brightness of the display module 200 and the ambient brightness is lower than the preset brightness value, i.e., a constant difference is always maintained between the brightness of the display module 200 and the ambient brightness, and the difference may be greater than zero or less than zero, i.e., the brightness of the display module 200 may be always greater than or less than a preset brightness value of the ambient brightness.
As shown in fig. 2, fig. 2 is a schematic block diagram of an embodiment of a display module 200 in a display panel of an air conditioner according to the present invention, in the embodiment, the display module 200 includes a plurality of groups of display units, each display unit includes a switch circuit 210 and a light emitter 220, a power input terminal of each switch circuit 210 is connected to a power output terminal of a power circuit 10, a controlled terminal of each switch circuit 210 is connected to a control terminal of a control circuit 20, and a power output terminal of the switch circuit 210 is connected to a power terminal of the light emitter 220;
the switch circuit 210 is used for being correspondingly turned on or off according to the control signal output by the control circuit 20, so that the power circuit 10 outputs a corresponding voltage to the light emitting body 220;
and the light emitter 220 is used for correspondingly lighting according to the voltage output by the power circuit 10.
In this embodiment, the light emitter 220 is disposed at a position corresponding to the display module 200 for providing a light source, the light emitter 220 can be an electroluminescent light emitter, a light emitting diode or other light emitters, and for simplifying the structure of the display module, in one embodiment, the light 220 is a Light Emitting Diode (LED), which is configured in an "88" configuration to display the current air conditioner temperature, or other operational state, the power input of the switching circuit 210 is connected to the output of the power circuit 10, and receives the dc voltage outputted from the power circuit 10, the control circuit 20 controls the power circuit 10 to output the dc voltage corresponding to the voltage level according to the ambient brightness, meanwhile, the corresponding switch circuit 210 is correspondingly controlled to be turned on or off according to the working state of the air conditioner, so that different Light Emitting Diodes (LEDs) are turned on or off in different states, thereby displaying different working states of the air conditioner.
The switch circuit 210 is a switch structure with on-off capability, and may be a switch tube, a relay, a switch chip, and the like, and is specifically configured according to requirements, in an embodiment, as shown in fig. 3, fig. 3 is a schematic circuit structure diagram of an embodiment of a control board of an air conditioner according to the present invention, and the switch circuit 210 includes a first resistor R1, a second resistor R2, and a switch tube Q1;
in this embodiment, the switching tube Q1 is a PMOS tube, the switching tube Q1 receives a control signal output by the control circuit 20 and is correspondingly turned on, and outputs a dc voltage output by the power circuit 10 to the light emitting diode LED, and the light emitting diode LED is correspondingly turned on.
Referring to fig. 3, in the present embodiment, the brightness detecting circuit 30 includes a brightness detecting circuit 30 including a third resistor R3, a fourth resistor R4, a photo resistor RT, and a first capacitor C1;
the first end of the photoresistor RT, the first end of the third resistor R3 and the dc power source VCC are interconnected, the second end of the photoresistor RT, the second end of the third resistor R3, the first end of the fourth resistor R4 and the first end of the first capacitor C1 are interconnected, the connection node is the signal end of the brightness detection circuit 30, and the second end of the fourth resistor R4 and the second end of the first capacitor C1 are both grounded.
In this embodiment, when the ambient brightness changes, the resistance of the photo resistor RT changes, and the voltage signal output to the control circuit 20 changes correspondingly, so as to feed back the current ambient brightness.
Referring to fig. 3, in the present embodiment, the power circuit 10 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a second capacitor C2, a third capacitor C3, an operational amplifier IC1, a first inductor L1, and a power chip U2;
a first end of a fifth resistor R5 is a controlled end of the power circuit 10, a second end of a fifth resistor R5, a first end of a sixth resistor R6 and an inverting input end of the operational amplifier IC1 are interconnected, a second end of a sixth resistor R6, an output end of the operational amplifier IC1 and a feedback pin of the power chip U2 are connected, a power input end of the power chip U2, a first end of a seventh resistor R7 and a direct current power source VCC are interconnected, a second end of a seventh resistor R7, a first end of a second capacitor C2 and a functional pin of the power chip U2 are interconnected, a ground end of the power chip U2 and a second end of a second capacitor C2 are both grounded, an output end of the power chip U2, a first end of a third capacitor C3 and a first end of a first inductor L1 are interconnected, a second end of a third capacitor C3 is connected with a voltage input end of the power chip U2, a second end of the first inductor L1 is connected with a first end of an eighth resistor R8 and a power node of the power supply circuit is connected with the power supply node 10, a second end of the eighth resistor R8, a first end of the ninth resistor R9, and a first end of the tenth resistor R10 are interconnected, a second end of the ninth resistor R9 is grounded, and a second end of the tenth resistor R10 is connected to the non-inverting input terminal of the operational amplifier IC 1.
In this embodiment, when obtaining the current ambient brightness, the control circuit 20 correspondingly outputs different voltage signals to the inverting input terminal of the operational amplifier IC1 to provide different reference voltage values, and the power chip U2 correspondingly adjusts the output voltage according to the different reference voltage values, so that the power circuit 10 outputs dc voltages of different voltage levels, and the types of the power chip U2 may be various and are not specifically limited.
As shown in fig. 4, in another embodiment, the power circuit 10 includes a fourth capacitor C4, a fifth capacitor C5, a first diode, a second inductor L2, and an NMOS transistor Q2;
a first end of the fourth capacitor C4 is connected to the drain of the NMOS transistor Q2, and a connection node is a power input end of the power circuit 10, a gate of the NMOS transistor Q2 is a controlled end of the power circuit 10, a source of the NMOS transistor Q2, a first end of the first diode, and a first end of the second inductor L2 are interconnected, a second end of the second inductor L2 is connected to a first end of the fifth capacitor C5, and a second end of the fourth capacitor C4 and a second end of the fifth capacitor C5 are both grounded.
In this embodiment, the power supply circuit 10 adopts a BUCK circuit, and the control circuit 20 correspondingly changes the duty ratio of the BUCK circuit according to the luminance detection signal, so that the power supply circuit 10 outputs dc voltages of different voltage levels.
In order to improve the driving stability of the display module 200, in an embodiment, the display control board 100 is further provided with a voltage sampling circuit (not shown), a signal input end of the voltage sampling circuit is connected to the output end of the power circuit 10, and a signal output end of the voltage sampling circuit is connected to the signal end of the control circuit 20;
a voltage sampling circuit for sampling the output voltage of the power supply circuit 10 and outputting a voltage sampling signal to the control circuit 20;
and the control circuit 20 is further configured to control the power supply circuit 10 to operate at a constant current according to the voltage sampling signal.
In this embodiment, the signal terminal of the control circuit 20 further obtains the output voltage value of the power supply circuit 10, and dynamically adjusts the output voltage value of the power supply circuit 10, so as to ensure constant-current operation of the display module 200 and improve driving stability.
The present invention further provides an air conditioner, which includes an air conditioner display panel, and the specific structure of the air conditioner display panel refers to the above embodiments, and since the air conditioner employs all technical solutions of all the above embodiments, the air conditioner at least has all beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. An air conditioner display panel, comprising:
a display module;
the display control panel is provided with a direct current power supply end, a control circuit, a power supply circuit and a brightness detection circuit, the direct current power supply end, the power supply end of the control circuit, the power supply input end of the power supply circuit and the power supply end of the brightness detection circuit are interconnected, the controlled end of the power supply circuit is connected with the control end of the control circuit, and the signal end of the brightness detection circuit is connected with the signal end of the control circuit;
the brightness detection circuit is used for detecting the ambient brightness and outputting a brightness detection signal to the control circuit;
the control circuit is used for determining that the current environment is a dark environment when the ambient brightness is less than or equal to a preset brightness lower limit value, and controlling the power supply circuit to output the minimum value of the working voltage interval of the display module to control the display module to display; and
when the ambient brightness is greater than or equal to a preset brightness upper limit value, determining that the current environment is a bright environment, and controlling the power circuit to output the maximum value of the working voltage interval of the display module to control the display module to display;
the display module comprises a plurality of groups of display units, each display unit comprises a switch circuit and a luminous body, the power input end of each switch circuit is respectively connected with the power output end of the power circuit, the controlled end of each switch circuit is respectively connected with the control end of the control circuit, and the power output end of each switch circuit is connected with the power end of the luminous body;
the switch circuit is used for being correspondingly switched on or switched off according to the control signal output by the control circuit, so that the power supply circuit outputs corresponding voltage to the luminous body;
the luminous body is used for correspondingly lighting according to the voltage output by the power circuit;
the luminous body is a light emitting diode;
the power supply circuit comprises a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a second capacitor, a third capacitor, an operational amplifier, a first inductor and a power supply chip;
the first end of the fifth resistor is a controlled end of the power circuit, the second end of the fifth resistor, the first end of the sixth resistor and the inverting input end of the operational amplifier are interconnected, the second end of the sixth resistor, the output end of the operational amplifier and the feedback pin of the power chip are connected, the power input end of the power chip, the first end of the seventh resistor and the direct-current power end are interconnected, the second end of the seventh resistor, the first end of the second capacitor and the functional pin of the power chip are interconnected, the ground terminal of the power chip and the second end of the second capacitor are both grounded, the output end of the power chip, the first end of the third capacitor and the first end of the first inductor are interconnected, the second end of the third capacitor is connected with the bootstrap voltage input end of the power chip, the second end of the first inductor is connected with the first end of the eighth resistor and the connection node is the power supply electrical node A second end of the eighth resistor, a first end of the ninth resistor, and a first end of the tenth resistor are interconnected, a second end of the ninth resistor is grounded, and a second end of the tenth resistor is connected to the non-inverting input terminal of the operational amplifier;
or the power supply circuit comprises a fourth capacitor, a fifth capacitor, a first diode, a second inductor and an NMOS (N-channel metal oxide semiconductor) tube;
the first end of the fourth capacitor is connected with the drain electrode of the NMOS tube, the connection node is the power input end of the power circuit, the grid electrode of the NMOS tube is the controlled end of the power circuit, the source electrode of the NMOS tube, the first end of the first diode and the first end of the second inductor are interconnected, the second end of the second inductor is connected with the first end of the fifth capacitor, and the second end of the fourth capacitor and the second end of the fifth capacitor are both grounded.
2. The air conditioner display panel of claim 1,
the control circuit is further configured to control the voltage output to the display module by the power supply circuit according to the brightness detection signal when the ambient brightness is greater than the preset brightness lower limit value and less than the preset brightness upper limit value, and control the display brightness of the display module to correspondingly change along with the brightness change trend of the ambient brightness, so that the difference value between the display brightness of the display module and the ambient brightness is lower than the preset brightness value.
3. The air conditioner display panel of claim 1 wherein said switching circuit comprises a first resistor, a second resistor and a switching tube;
the power input end of the switch tube, the first end of the first resistor and the power output end of the power circuit are interconnected, the second end of the first resistor, the first end of the second resistor and the controlled end of the switch tube are interconnected, and the second end of the second resistor is the controlled end of the switch circuit.
4. The air conditioner display panel of claim 3 wherein the brightness detection circuit comprises a third resistor, a fourth resistor, a photo resistor, and a first capacitor;
the first end of the photoresistor, the first end of the third resistor and the direct current power supply end are interconnected, the second end of the photoresistor, the second end of the third resistor, the first end of the fourth resistor and the first end of the first capacitor are interconnected, a connection node of the photoresistor, the second end of the third resistor, the first end of the fourth resistor and the first end of the first capacitor is a signal end of the brightness detection circuit, and the second end of the fourth resistor and the second end of the first capacitor are both grounded.
5. The display panel of claim 1, wherein the display control board further comprises a voltage sampling circuit, a signal input terminal of the voltage sampling circuit is connected to an output terminal of the power circuit, and a signal output terminal of the voltage sampling circuit is connected to a signal terminal of the control circuit;
the voltage sampling circuit is used for sampling the output voltage of the power supply circuit and outputting a voltage sampling signal to the control circuit;
the control circuit is also used for controlling the power supply circuit to work at constant current according to the voltage sampling signal.
6. An air conditioner characterized by comprising the air conditioner display panel according to any one of claims 1 to 5.
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| CN113689827A (en) * | 2021-08-30 | 2021-11-23 | 四川虹美智能科技有限公司 | Air conditioner wire controller |
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