CN212628527U

CN212628527U - Tangka

Info

Publication number: CN212628527U
Application number: CN202021835076.3U
Authority: CN
Inventors: 邓刚; 邓志芳; 肖爱; 罗尚燕; 周敏翠; 苪涛; 王振
Original assignee: Shenzhen Caravan Signs Ltd
Current assignee: Shenzhen Caravan Signs Ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-02-26
Anticipated expiration: 2030-08-27

Abstract

The utility model relates to a Thangka belongs to the field of Thangka show, and it includes the frame, presses frame, backer, canvas and light, still including the brightness control circuit who is used for the power supply of light and is used for adjusting light luminance according to ambient brightness, and power supply's output is connected with brightness control circuit's input, and brightness control circuit's output supplies power for the light. Compared with the prior art, this application has the effect of practicing thrift the electric energy.

Description

Tangka

Technical Field

The application relates to the field of Thangka display, in particular to a Thangka.

Background

The Thangka is a religious scroll painting hung after being cut and mounted, and is a unique painting art form in Tibetan culture. The Tangka is a precious non-material cultural heritage in Chinese folk art, and has good ornamental and collection properties.

The Chinese patent application with the current publication number of CN205498471U discloses a Thangka, which mainly comprises a picture frame, a base fabric, a canvas, a pressing frame and a cold light lamp, wherein the canvas is fixed on the front surface of the base fabric, the picture frame is arranged on the front surface of the base fabric, the pressing frame is arranged on the back surface of the base fabric, and the cold light lamp is arranged on four inner corners and the middle of the pressing frame. Therefore, the brightness of the Thangka can be set off in a dim environment or an environment with insufficient brightness.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the brightness of the environment changes with time and weather, but the brightness of the illuminating lamp is not changed all the time, so that the problem of wasting electric energy exists.

SUMMERY OF THE UTILITY MODEL

To improve the problem of wasting electrical energy, the present application provides a Thangka.

The Thangka adopts the following technical scheme:

the Thangka comprises a picture frame, a pressing frame, a base fabric, canvas and an illuminating lamp, and further comprises a power supply for supplying power to the illuminating lamp and a brightness adjusting circuit for adjusting the brightness of the illuminating lamp according to the ambient brightness, wherein the output end of the power supply is connected with the input end of the brightness adjusting circuit, and the output end of the brightness adjusting circuit supplies power to the illuminating lamp.

Through adopting above-mentioned technical scheme, the luminance of light is adjusted according to ambient brightness to the adjustting of the lighteness circuit, and when the environment was dim, light luminance was higher, and when the environment was bright, light luminance was faint or even did not, and the dim light is bright more in the environment promptly to reduce the waste of electric energy, and then practice thrift the electric energy.

Preferably, the brightness adjusting circuit comprises a ninth resistor R9 and a light-sensitive resistor R10, one end of the ninth resistor is connected to the output end of the power supply, the other end of the ninth resistor R9 is connected to one end of the light-sensitive resistor R10, the other end of the light-sensitive resistor R10 is grounded, and the connection point of the ninth resistor R9 and the light-sensitive resistor R10 is a first output end which supplies power to the illumination lamp.

By adopting the technical scheme, the larger the light intensity is, the smaller the resistance value of the photoresistor R10 is, and conversely, the larger the resistance value of the photoresistor is. Therefore, when the environment is darker, the voltage divided by the photoresistor is larger, the illuminating lamp is brighter, when the environment is brighter, the voltage divided by the photoresistor is smaller, the illuminating lamp is darker or even has no brightness, and therefore the brightness of the illuminating lamp is adjusted.

Preferably, power supply includes first photovoltaic board, second photovoltaic board, first charge-discharge circuit, second charge-discharge circuit and switching circuit discharges, first photovoltaic board and second photovoltaic board all set up on the surface of pressing the frame, the positive pole of first photovoltaic board is connected with first charge-discharge circuit's input, the negative pole and the earthing terminal of first photovoltaic board are connected, the positive pole and the input of second charge-discharge circuit of second photovoltaic board are connected, the negative pole and the earthing terminal of second photovoltaic board are connected, switching circuit discharges and sets up between first charge-discharge circuit's output and second charge-discharge circuit's output to switch the power supply of second charge-discharge circuit when realizing that first charge-discharge circuit damages.

By adopting the technical scheme, the electric energy of the power supply is obtained by solar charging, so that the electric energy is further saved; and the power supply has two charge-discharge circuits, namely two energy storage elements exist, wherein the first charge-discharge circuit charges and discharges one energy storage element, the second charge-discharge circuit charges and discharges the other energy storage element, the first charge-discharge circuit is commonly used, and when the energy storage element in the first charge-discharge circuit or the first charge-discharge circuit is damaged, the discharge switching circuit switches the charge-discharge path to discharge the second charge-discharge circuit, thereby avoiding the situation that the Tang card cannot be seen due to the fact that power cannot be supplied when the light is dim to a certain extent.

Preferably, the first charging and discharging circuit comprises a first PMOS transistor Q1, a first diode D1, a first rechargeable battery C1, a first detection unit for detecting the electric quantity of the first rechargeable battery C1, and a first control unit MCU 1; wherein the content of the first and second substances,

the source electrode of the first PMOS tube Q1 is connected with the anode of the first photovoltaic panel, the grid electrode of the first PMOS tube Q1 is connected with the first control unit MCU1, and the drain electrode of the first PMOS tube Q1 is connected with the anode of the first diode D1;

the cathode of the first diode D1 is connected to the anode of the first rechargeable battery C1, the first input terminal of the discharge switching circuit and the voltage input terminal of the first control unit MCU1, and the cathode of the first rechargeable battery C1 is connected to the ground terminal;

the first detection unit is connected with a first control unit MCU 1.

By adopting the technical scheme, the first control unit judges whether the first rechargeable battery is fully charged by detecting the electric quantity of the first rechargeable battery, and controls the on-off of the first PMOS pipeline by increasing the high level and the low level of the grid electrode of the first PMOS pipe Q1, thereby controlling whether the first rechargeable battery needs to be charged continuously; the first diode is used to prevent the first rechargeable battery from charging the first photovoltaic panel in reverse.

Preferably, the first sensing unit includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4; wherein the content of the first and second substances,

one end of the first resistor R1 is connected to the drain of the first PMOS transistor Q1, the other end of the first resistor R1 is connected to the first control unit MCU2 and one end of the second resistor R2, and the other end of the second resistor R2 is connected to the ground;

one end of the third resistor R3 is connected to the anode of the first rechargeable battery C1, the other end of the third resistor R3 is connected to the first control unit MCU1 and one end of the fourth resistor R4, and the other end of the fourth resistor R4 is connected to the ground;

the resistance ratio of the first resistor R1 to the second resistor R2 is the same as the resistance ratio of the third resistor R3 to the fourth resistor R4.

By adopting the above technical solution, the first control unit MCU1 detects the voltage across the first photovoltaic panel through the first resistor R1 and the second resistor R2, and the first control unit MCU1 detects the voltage across the first rechargeable battery through the third resistor R3 and the fourth resistor R4, when the difference between the voltage across the first photovoltaic panel and the voltage across the first rechargeable battery is less than the voltage drop of the first diode, it indicates that the first rechargeable battery is fully charged, thereby facilitating to detect the state of charge of the first rechargeable battery.

Preferably, the second charging and discharging circuit comprises a second PMOS transistor Q2, a third diode D3, a second rechargeable battery C2, a second detecting unit for detecting the electric quantity of the second rechargeable battery C2, and a second control unit MCU 2; wherein the content of the first and second substances,

the source electrode of the second PMOS transistor Q2 is connected with the anode of the second photovoltaic panel, the gate electrode of the second PMOS transistor Q2 is connected with the second control unit MCU2, and the drain electrode of the second PMOS transistor Q2 is connected with the anode of the third diode D2;

the cathode of the third diode D3 is connected to the anode of the second rechargeable battery C2, the second input terminal of the discharge switching circuit, and the voltage input terminal of the second control unit MCU2, and the cathode of the second rechargeable battery C2 is connected to the ground terminal;

the second detection unit is connected with a second control unit MCU 2.

By adopting the technical scheme, the second control unit judges whether the second rechargeable battery is fully charged by detecting the electric quantity of the second rechargeable battery, and controls the on-off of the second PMOS pipe by increasing the high level and the low level of the grid electrode of the second PMOS pipe, so as to control whether the second rechargeable battery needs to be charged continuously; the third diode is used to prevent the second rechargeable battery from charging the second photovoltaic panel in a reverse direction.

Preferably, the second sensing unit includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8; wherein the content of the first and second substances,

one end of the fifth resistor R5 is connected to the drain of the second PMOS transistor Q2, the other end of the fifth resistor R5 is connected to one ends of the second control unit MCU2 and the sixth resistor R6, and the other end of the sixth resistor R6 is connected to the ground;

one end of the seventh resistor R7 is connected to the anode of the second rechargeable battery C2, the other end of the seventh resistor R7 is connected to the second control unit MCU2 and one end of the eighth resistor R8, and the other end of the eighth resistor R8 is connected to the ground;

the resistance ratio of the fifth resistor R5 to the sixth resistor R6 is the same as the resistance ratio of the seventh resistor R7 to the eighth resistor R8.

By adopting the technical scheme, the second control unit detects the voltage at two ends of the second photovoltaic panel through the fifth resistor R5 and the sixth resistor R6, detects the voltage at two ends of the second rechargeable battery through the seventh resistor R7 and the eighth resistor R8, and indicates that the second rechargeable battery is fully charged when the difference value between the voltage at two ends of the second photovoltaic panel and the voltage at two ends of the second rechargeable battery is less than the voltage drop of the third diode, so that the state of charge of the second rechargeable battery can be detected conveniently.

Preferably, the discharge switching circuit includes a first PNP transistor Q3 and a second PNP transistor Q4; wherein the content of the first and second substances,

the base electrode of the first PNP triode Q3 is connected with the emitter electrode of the second PNP triode Q4, the connection point of the base electrode of the first PNP triode Q3 and the emitter electrode of the second PNP triode Q4 is the first input terminal IN1 of the discharge switching circuit, and the first input terminal IN1 of the discharge switching circuit is connected with the output terminal of the first charge-discharge circuit;

the emitter of the first PNP triode Q3 is the second input terminal IN2 of the discharge switching circuit, and the second input terminal IN2 of the discharge switching circuit is connected to the output terminal of the second charge-discharge circuit;

the collector of the first PNP triode Q3 is connected to the base of the second PNP triode Q4 and the collector of the second PNP triode Q4, and the collector of the second PNP triode Q4 is connected to the output terminal of the power supply and the input terminal of the brightness adjusting circuit.

By adopting the technical scheme, when the power supply supplies power and the first charge-discharge circuit and the second charge-discharge circuit are both normal, the base of the first PNP triode Q3 is at a high level, the first PNP triode Q3 is not conducted, the base of the second PNP triode Q4 is at a low level, the emitter of the second PNP triode Q4 is at a high level, the second charge-discharge circuit does not supply power, and the first charge-discharge circuit supplies power, namely the first charge-discharge circuit is commonly used for supplying power; when the first chargeable circuit is damaged, the base electrode of the first PNP triode is at a low level, the emitter electrode of the first PPNP triode is at a high level, the first PNP triode is conducted at the moment, and the second chargeable circuit starts to supply power, so that the switching of the power supply circuit is realized.

Preferably, an audio player with adjustable volume is arranged on the pressing frame, the output end of the power supply is a second output end, and the second output end supplies power to the audio player.

By adopting the technical scheme, the audio player can play music and improve the viewing experience of people.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the application provides a Thangka, through the combined action of a power supply and a brightness adjusting circuit, when the environment is dim, the brightness of an illuminating lamp is higher, when the environment is bright, the brightness of the illuminating lamp is weak or even not, namely, the illuminating lamp is brighter when the environment is dim, so that the problem of wasting electric energy is solved, and further the electric energy is saved;

2. through the combined action of the first photovoltaic panel, the second photovoltaic panel, the first charge-discharge circuit, the second charge-discharge circuit and the discharge switching circuit, when the energy storage element in the first charge-discharge circuit or the first charge-discharge circuit is damaged, the discharge switching circuit switches the charge-discharge path to discharge the second charge-discharge circuit, so that the situation that the Tang card cannot be seen due to the fact that power cannot be supplied when light is dim is avoided to a certain extent.

Drawings

Fig. 1 is a schematic structural diagram of a Thangka according to an embodiment of the present application.

Fig. 2 is a schematic circuit diagram according to an embodiment of the present application.

Description of reference numerals: 1. a picture frame; 2. pressing the frame; 3. base fabric; 4. a canvas; 5. an illuminating lamp; 6. a first photovoltaic panel; 7. a second photovoltaic panel; 8. an audio player.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses a Thangka. Referring to fig. 1 and 2, the Thangka includes a picture frame 1, a pressing frame 2, a canvas 4 and illuminating lamps 5, wherein the illuminating lamps 5 are six and are disposed at four inner corners and two opposite inner walls of the pressing frame 2. In order to improve the problem of wasting electric energy, the Thangka further comprises a power supply for supplying power to the illuminating lamp 5 and a brightness adjusting circuit 104 for adjusting the brightness of the illuminating lamp 5 according to the ambient brightness, wherein the output end of the power supply is connected with the input end of the brightness adjusting circuit 104, and the output end of the brightness adjusting circuit 104 supplies power to the illuminating lamp 5. When the environment is dim, 5 luminance of light are higher, and when the environment is bright, 5 luminance of light are weak or even do not have, and dim light 5 is brighter more promptly the environment to reduce the waste of electric energy, and then practice thrift the electric energy. In this embodiment, the illumination lamp 5 is a cold light lamp.

Referring to fig. 1 and 2, in order to prevent from seeing the trockcard due to the power failure in the dark to a certain extent, the power supply includes a first photovoltaic panel 6, a second photovoltaic panel 7, a first charging and discharging circuit 101, a second charging and discharging circuit 102, and a discharging switching circuit 103. First photovoltaic board 6 and second photovoltaic board 7 all set up on the surface of pressing frame 2, the positive pole of first photovoltaic board 6 is connected with first charging and discharging circuit 101's input, the negative pole of first photovoltaic board 6 is connected with the earthing terminal, the positive pole of second photovoltaic board 7 is connected with second charging and discharging circuit 102's input, the negative pole of second photovoltaic board 7 is connected with the earthing terminal, the switching circuit that discharges sets up between first charging and discharging circuit 101's output and second charging and discharging circuit 102's output, switch second charging and discharging circuit 102 power supply when in order to realize first charging and discharging circuit 101 damages. In practical applications, the first charging/discharging circuit 101 is usually used for supplying power, and when the first charging/discharging circuit 101 is damaged, the discharging switching circuit 103 switches the charging/discharging path to discharge the second charging/discharging circuit 102.

In other embodiments, the first photovoltaic panel 6 and the second photovoltaic panel 7 can be replaced by other charging power sources, such as household ac power sources and the like.

Referring to fig. 1 and 2, the first charging and discharging circuit 101 includes a first PMOS transistor Q1, a first diode D1, a first rechargeable battery C1, a first detecting unit 1011 for detecting an electric quantity of the first rechargeable battery C1, and a first control unit MCU 1; wherein the content of the first and second substances,

the source electrode of the first PMOS transistor Q1 is connected with the anode of the first photovoltaic panel 6, the gate electrode of the first PMOS transistor Q1 is connected with the first control unit MCU1, and the drain electrode of the first PMOS transistor Q1 is connected with the anode of the first diode D1;

the cathode of the first diode D1 is connected to the anode of the first rechargeable battery C1, the first input terminal IN1 of the discharge switching circuit 103, and the voltage input terminal of the first control unit MCU1, and the cathode of the first rechargeable battery C1 is connected to the ground terminal;

the first detection unit 1011 is connected to the first control unit MCU 1.

The first control unit MCU1 is a control unit of the single chip microcomputer.

In the above embodiment of the first charging and discharging circuit 101, the first control unit 1011 determines whether the first rechargeable battery C1 is fully charged by detecting the power of the first rechargeable battery 101, and controls the on/off of the first PMOS pipe Q1 by raising the high level or the low level to the gate of the first PMOS pipe Q1, so as to control whether the first rechargeable battery C1 needs to be charged continuously; the first diode D1 is used to prevent the first rechargeable battery C1 from charging the first photovoltaic panel 6 in reverse.

Referring to fig. 2, the first sensing unit 1011 includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4; wherein the content of the first and second substances,

one end of the first resistor R1 is connected to the drain of the first PMOS transistor Q1, the other end of the first resistor R1 is connected to one ends of the first control unit MCU2 and the second resistor R2, and the other end of the second resistor R2 is connected to the ground;

one end of the third resistor R3 is connected to the anode of the first rechargeable battery C1, the other end of the third resistor R3 is connected to one ends of the first control unit MCU1 and the fourth resistor R4, and the other end of the fourth resistor R4 is connected to the ground;

In the above-mentioned embodiment of the first detecting unit 101, the first control unit MCU1 detects the voltage across the first photovoltaic panel 6 through the first resistor R1 and the second resistor R2, and the first control unit MCU1 detects the voltage across the first rechargeable battery C1 through the third resistor R3 and the fourth resistor R4, and when the difference between the voltage across the first photovoltaic panel 6 and the voltage across the first rechargeable battery is smaller than the voltage drop of the first diode, it indicates that the first rechargeable battery is fully charged, thereby facilitating detection of the state of charge of the first rechargeable battery.

Referring to fig. 1 and 2, in order for the first charge and discharge circuit 101 to output a stable voltage, a first voltage converter DC/DC1 is provided between the first rechargeable battery C1 and the first control unit MCU1 to output a stable voltage. And the first input terminal IN1 of the discharge switching circuit 103 is connected to the connection point between the first voltage converter DC/DC1 and the first control unit MCU 1. To indicate that the first rechargeable battery C1 has been fully charged, an anode of the first light emitting diode D2 is connected at one output terminal of the first control unit MCU1, and a cathode of the first light emitting diode D2 is connected to a ground terminal.

Referring to fig. 2, the second charging and discharging circuit 102 includes a second PMOS transistor Q2, a third diode D3, a second rechargeable battery C2, a second detecting unit 1021 for detecting the power of the second rechargeable battery C2, and a second control unit MCU 2; wherein the content of the first and second substances,

the source electrode of the second PMOS transistor Q2 is connected with the anode of the second photovoltaic panel 7, the gate electrode of the second PMOS transistor Q2 is connected with the second control unit MCU2, and the drain electrode of the second PMOS transistor Q2 is connected with the anode of the third diode D2;

the cathode of the third diode D3 is connected to the anode of the second rechargeable battery C2, the second input terminal IN2 of the discharge switching circuit, and the voltage input terminal of the second control unit MCU2, and the cathode of the second rechargeable battery C2 is connected to the ground terminal;

the second detection unit 1021 is connected with a second control unit MCU 2.

In the above embodiment of the second charging and discharging circuit 102, the second control unit MCU2 determines whether the second rechargeable battery C2 is fully charged by detecting the electric quantity of the second rechargeable battery C2, and controls the on/off of the second PMOS transistor Q2 by raising the high level and the low level of the gate of the second PMOS transistor Q2, so as to control whether the second rechargeable battery C2 needs to be charged continuously; the third diode D3 is used to prevent the second rechargeable battery C2 from charging the second photovoltaic panel 7 in the reverse direction.

Referring to fig. the second sensing unit 1021 includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8; wherein the content of the first and second substances,

one end of a fifth resistor R5 is connected to the drain of the second PMOS transistor Q2, the other end of the fifth resistor R5 is connected to one ends of the second control unit MCU2 and the sixth resistor R6, and the other end of the sixth resistor R6 is connected to the ground;

one end of the seventh resistor R7 is connected to the anode of the second rechargeable battery C2, the other end of the seventh resistor R7 is connected to one ends of the second control unit MCU2 and the eighth resistor R8, and the other end of the eighth resistor R8 is connected to the ground;

the resistance ratio of the fifth resistor R5 and the sixth resistor R6 is the same as the resistance ratio of the seventh resistor R7 and the eighth resistor R8.

In the above embodiment of the second detecting unit 1021, the second control unit MCU2 detects the voltage across the second photovoltaic panel 7 through the fifth resistor R5 and the sixth resistor R6, and the second control unit MCU2 detects the voltage across the second rechargeable battery C2 through the seventh resistor R7 and the eighth resistor R8, and when the difference between the voltage across the second photovoltaic panel 7 and the voltage across the second rechargeable battery C2 is smaller than the voltage drop of the third diode D3, it indicates that the second rechargeable battery C2 is fully charged, so as to facilitate detecting the state of charge of the second rechargeable battery C2.

Referring to fig. 2, in order for the second charge and discharge circuit 102 to output a stable voltage, a second voltage converter DC/DC2 is provided between the second rechargeable battery C2 and the second control unit MCU2 to output a stable voltage. And the second input terminal IN2 of the discharge switching circuit 103 is connected to a connection point between the second voltage converter DC/DC2 and the second control unit MCU 2. To indicate that the second rechargeable battery C2 has been fully charged, an anode of the second light emitting diode D4 is connected at one output terminal of the second control unit MCU2, and a cathode of the second light emitting diode D4 is connected to the ground terminal.

Referring to fig. 2, the discharge switching circuit 103 includes a discharge switching circuit 103 including a first PNP transistor Q3 and a second PNP transistor Q4; wherein the content of the first and second substances,

the base of the first PNP triode Q3 is connected to the emitter of the second PNP triode Q4, the connection point between the base of the first PNP triode Q3 and the emitter of the second PNP triode Q4 is the first input terminal IN1 of the discharge switching circuit 103, and the first input terminal IN1 of the discharge switching circuit 103 is connected to the output terminal of the first charge and discharge circuit 101;

the emitter of the first PNP triode Q3 is the second input terminal IN2 of the discharge switching circuit 103, and the second input terminal IN2 of the discharge switching circuit 103 is connected to the output terminal of the second charge and discharge circuit 102;

the collector of the first PNP transistor Q3 is connected to the base of the second PNP transistor Q4 and the collector of the second PNP transistor Q4, and the collector of the second PNP transistor Q4 is the output terminal of the power supply and is connected to the input terminal of the brightness adjustment circuit 104.

In the embodiment of the discharge switching circuit 103, when the power supply supplies power and the first charge and discharge circuit 101 and the second charge and discharge circuit 102 are both normal, the base of the first PNP transistor Q3 is at a high level, the first PNP transistor Q3 is not turned on, the base of the second PNP transistor Q4 is at a low level, the emitter of the second PNP transistor Q4 is at a high level, the second charge and discharge circuit 102 does not supply power, and the first charge and discharge circuit 102 supplies power, that is, the first charge and discharge circuit 102 supplies power; when the first rechargeable circuit 102 is damaged, the base of the first PNP transistor Q3 is at a low level, the emitter of the first PPNP transistor Q3 is at a high level, and at this time, the first PNP transistor Q3 is turned on, and the second rechargeable circuit 102 starts to supply power, so that the switching of the power supply circuit is realized.

Referring to fig. 2, the brightness adjusting circuit 104 includes a ninth resistor R9 and a photo resistor R10, one end of the ninth resistor R9 is connected to the power supply output terminal, the other end of the ninth resistor R9 is connected to one end of the photo resistor R10, the other end of the photo resistor R10 is grounded, the connection point of the ninth resistor R9 and the photo resistor R10 is a first output terminal OUT1, and the first output terminal OUT1 supplies power to the illumination lamp.

In the embodiment of the brightness adjusting circuit 104, the resistance of the photo resistor R10 is smaller when the light intensity is larger, and conversely, the resistance of the photo resistor R10 is larger. Therefore, the dimmer the environment, the larger the voltage divided by the photoresistor R10, the brighter the illumination lamp 5, and the brighter the environment, the smaller the voltage divided by the photoresistor R10, the darker the illumination lamp 5, or even no illumination, thereby realizing the adjustment of the illumination lamp 5.

Referring to fig. 1 and 2, in order to improve the viewing experience of people, an audio player 8 with adjustable volume is disposed on the pressing frame 2, the output end of the power supply is a second output end OUT2, and the second output end OUT2 supplies power to the audio player 8.

Referring to fig. 2, in order to supply power to the audio player 8 and the illumination lamp 5 when power is not required, a switch S is provided between the collector of the second PNP transistor Q4 and the second output terminal OUT 2.

The implementation principle of the Thangka in the embodiment of the application is as follows: when sunlight exists in the daytime, the first photovoltaic panel 6 and the second photovoltaic panel 7 charge the first rechargeable battery C1 and the second rechargeable battery C2, when no sunlight exists and the environment is dim, the brightness adjusting circuit 104 controls the brightness of the illuminating lamp 5 to change along with the change of the brightness, and the brighter the environment is, the darker the illuminating lamp 5 is; on the contrary, the illuminating lamp 5 is brighter; when the first rechargeable battery C1 or the first charging and discharging circuit 101 is damaged, the discharging switching circuit 103 switches the second charging and discharging circuit 102 to supply power so that the second rechargeable battery C2 supplies power.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a Thangka, includes frame (1), pressure frame (2), backer (3), canvas (4) and light (5), its characterized in that: the lighting lamp system further comprises a power supply for supplying power to the lighting lamp (5) and a brightness adjusting circuit (104) for adjusting the brightness of the lighting lamp (5) according to the ambient brightness, the output end of the power supply is connected with the input end of the brightness adjusting circuit (104), and the output end of the brightness adjusting circuit (104) supplies power to the lighting lamp (5).

2. The Thangka of claim 1, wherein: the brightness adjusting circuit (104) comprises a ninth resistor R9 and a photosensitive resistor R10, one end of the ninth resistor R9 is connected with the output end of the power supply, the other end of the ninth resistor R9 is connected with one end of the photosensitive resistor R10, the other end of the photosensitive resistor R10 is grounded, the connection point of the ninth resistor R9 and the photosensitive resistor R10 is a first output end OUT1, and the first output end OUT1 supplies power to the illuminating lamp (5).

3. The Thangka of claim 1, wherein: the power supply comprises a first photovoltaic panel (6), a second photovoltaic panel (7), a first charging and discharging circuit (101), a second charging and discharging circuit (102) and a discharging switching circuit (103), the first photovoltaic panel (6) and the second photovoltaic panel (7) are both arranged on the surface of the press frame (2), the anode of the first photovoltaic panel (6) is connected with the input end of a first charge-discharge circuit (101), the cathode of the first photovoltaic panel (6) is connected with a grounding end, the anode of the second photovoltaic panel (7) is connected with the input end of a second charge-discharge circuit (102), the cathode of the second photovoltaic panel (7) is connected with the ground terminal, the discharge switching circuit (103) is arranged between the output end of the first charge-discharge circuit (101) and the output end of the second charge-discharge circuit (102), so as to realize the switching of the second charging and discharging circuit (102) to supply power when the first charging and discharging circuit (101) is damaged.

4. The Thangka of claim 3, wherein: the first charging and discharging circuit (101) comprises a first PMOS tube Q1, a first diode D1, a first rechargeable battery C1, a first detection unit (1011) for detecting the electric quantity of the first rechargeable battery C1 and a first control unit MCU 1; wherein the content of the first and second substances,

the source electrode of the first PMOS tube Q1 is connected with the anode of the first photovoltaic panel (6), the grid electrode of the first PMOS tube Q1 is connected with the first control unit MCU1, and the drain electrode of the first PMOS tube Q1 is connected with the anode of the first diode D1;

the cathode of the first diode D1 is connected to the anode of the first rechargeable battery C1, the first input terminal IN1 of the discharge switching circuit, and the voltage input terminal of the first control unit MCU1, and the cathode of the first rechargeable battery C1 is connected to the ground terminal;

the first detection unit (1011) is connected with a first control unit MCU 1.

5. The Thangka of claim 4, wherein: the first sensing unit (1011) includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4; wherein the content of the first and second substances,

6. The Thangka of claim 3, wherein: the second charging and discharging circuit (102) comprises a second PMOS tube Q2, a third diode D3, a second rechargeable battery C2, a second detection unit (1021) for detecting the electric quantity of the second rechargeable battery C2 and a second control unit MCU 2; wherein the content of the first and second substances,

the source electrode of the second PMOS tube Q2 is connected with the anode of a second photovoltaic panel (7), the gate electrode of the second PMOS tube Q2 is connected with a second control unit MCU2, and the drain electrode of the second PMOS tube Q2 is connected with the anode of a third diode D2;

the second detection unit (1021) is connected with a second control unit MCU 2.

7. The Thangka of claim 6, wherein: the second sensing unit (1021) includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8; wherein the content of the first and second substances,

8. The Thangka of claim 3, wherein: the discharge switching circuit (103) comprises a first PNP transistor Q3 and a second PNP transistor Q4; wherein the content of the first and second substances,

the base electrode of the first PNP triode Q3 is connected with the emitter electrode of the second PNP triode Q4, the connection point of the base electrode of the first PNP triode Q3 and the emitter electrode of the second PNP triode Q4 is the first input end IN1 of the discharge switching circuit (103), and the first input end IN1 of the discharge switching circuit (103) is connected with the output end of the first charge-discharge circuit (101);

the emitter of the first PNP triode Q3 is the second input terminal IN2 of the discharge switching circuit (103), and the second input terminal IN2 of the discharge switching circuit (103) is connected to the output terminal of the second charge and discharge circuit (102);

the collector of the first PNP triode Q3 is connected with the base of the second PNP triode Q4 and the collector of the second PNP triode Q4, and the collector of the second PNP triode Q4 is the output end of the power supply and is connected with the input end of the brightness adjusting circuit (104).

9. The Thangka of claim 2, wherein: an audio player (8) with adjustable volume is arranged on the pressing frame (2), the output end of the power supply is a second output end OUT2, and the second output end OUT2 supplies power to the audio player (8).