Power supply device

Abstract

A power supply device comprises a power supply, a change-over switch, a first circuit, a second circuit and a controller. The change-over switch is electrically connected to the power supply. The first circuit is provided with a first connecting end, a second connecting end and a filter, the filter is located between the first connecting end and the second connecting end, and the first connecting end is electrically connected to the change-over switch. The second circuit is provided with a third connecting end and a fourth connecting end, and the third connecting end is electrically connected to the change-over switch. The controller is electrically connected with the change-over switch, and the controller controls the change-over switch to switch the first circuit or the second circuit to be electrically connected with the power supply according to the environment brightness value or the image brightness value.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electronic device, in particular to a power supply device. BACKGROUND

[0002] With the development of technology, cameras are increasingly used in various fields such as personal electronic products, automotive field, medical field, etc. to acquire external images. For example, cameras can be installed on vehicles to acquire images outside the vehicle for the purpose of driving assistance.

[0003] In some ambient brightness conditions (e.g. too low or too high), the images acquired by the camera can be unclear. In order to improve the clarity of the images, the camera usually adjusts the exposure setting of the image sensor, but such adjustment can cause noise in the image acquired by the image sensor. SUMMARY

[0004] In view of the above, in one embodiment, a power supply device is provided, which includes a power supply, a switch, a first circuit, a second circuit and a controller. The switch is electrically connected to the power supply. The first circuit has a first connection end, a second connection end and a filter, the filter being located between the first connection end and the second connection end, and the first connection end being electrically connected to the switch. The second circuit has a third connection end and a fourth connection end, and the third connection end is electrically connected to the switch. The controller is electrically connected to the switch, and the controller controls the switch to switch the first circuit or the second circuit electrically connected to the power supply according to the ambient brightness value or the image brightness value.

[0005] In summary, according to the power supply device of the utility model embodiment, the controller can control the switch to switch the first circuit or the second circuit with different power consumption electrically connected to the power supply according to the ambient brightness value or the image brightness value, so that the power supply can be connected to the image sensor through a suitable circuit to cooperate with different situations, thereby optimizing the quality of acquired images and reducing energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 The hardware block diagram of the first embodiment of the power supply device of the utility model.

[0007] Figure 2 The switching schematic diagram of the first embodiment of the power supply device of the utility model.

[0008] Figure 3 The hardware block diagram of the second embodiment of the power supply device of the utility model.

[0009] Figure 4 The hardware block diagram of the third embodiment of the power supply device of the utility model.

[0010] Figure 5 Circuit schematic diagram of the light sensing unit of the third embodiment of the power supply device of the present application.

[0011] Figure 6 Voltage change diagram of the light sensing unit of the third embodiment of the power supply device of the present application.

[0012] Figure 7 Hardware block diagram of the fourth embodiment of the power supply device of the present application.

[0013] Reference numerals are explained as follows:

[0014] 1: camera

[0015] 10: image sensor

[0016] 20: power supply device

[0017] 21: power supply

[0018] 22: switch

[0019] 23: first circuit

[0020] 231: first connection end

[0021] 232: second connection end

[0022] 233: filter

[0023] 24: second circuit

[0024] 241: third connection end

[0025] 242: fourth connection end

[0026] 25: controller

[0027] 251: light sensing unit

[0028] 252: photoresistor

[0029] 253: fixed resistor

[0030] 255: image processing unit

[0031] V: node voltage DETAILED DESCRIPTION

[0032] Figure 1 Hardware block diagram of the first embodiment of the power supply device of the present application, Figure 2 Switching schematic diagram of the first embodiment of the power supply device of the present application. As Figure 1 and Figure 2As shown, the power supply device 20 of the embodiments of the present application can be applied to the camera 1. In some embodiments, the camera 1 can be applied to various electronic products to acquire images around the electronic products. For example, the camera 1 can be applied to electronic products such as vehicle products (e.g., a driving recorder, a reversing imaging system, or a panoramic imaging system) or mobile devices (e.g., a smart phone, a tablet computer, or a notebook computer).

[0033] As shown, Figure 1 With Figure 2 As shown, the camera 1 includes an image sensor 10 to acquire images in an environment and convert the images into digital signals for subsequent processing or display. In some embodiments, the image sensor 10 can be a charge-coupled device (CCD), a complementary metal-oxide semiconductor (CMOS), or a CMOS active pixel sensor.

[0034] As shown, Figure 1 With Figure 2 As shown, the power supply device 20 includes a power supply 21 to provide power required by the image sensor 10, a switch 22, a first circuit 23, a second circuit 24, and a controller 25. In some embodiments, the power supply 21 can be a direct current power supply or an alternating current power supply.

[0035] As shown, Figure 1 With Figure 2 As shown, the switch 22 is electrically connected to the power supply 21, and the switch 22 is used to switch the power supply 21 to be electrically connected to the first circuit 23 or the second circuit 24. In the present embodiment, the first circuit 23 has a first connection end 231, a second connection end 232, and a filter 233 electrically connected between the first connection end 231 and the second connection end 232. The first connection end 231 of the first circuit 23 is electrically connected to the switch 22, and the second connection end 232 of the first circuit 23 can be used to be electrically connected to the image sensor 10. Thus, as shown, Figure 1 As shown, when the switch 22 switches the power supply 21 to be electrically connected to the first circuit 23, the power supply 21 can provide the power required by the image sensor 10 via the first circuit 23 through the filter 233.

[0036] As shown, Figure 1 With Figure 2As shown, the second circuit 24 has a third connection end 241 and a fourth connection end 242, the third connection end 241 of the second circuit 24 is electrically connected to the switch 22, and the fourth connection end 242 of the second circuit 24 can be used to electrically connect the image sensor 10. Thus, as shown Figure 2 As shown, when the switch 22 switches the power supply 21 to electrically connect the second circuit 24, the power supply 21 can provide the required power for the image sensor 10 through the second circuit 24.

[0037] As shown Figure 1 As shown Figure 2 As shown, because the first circuit 23 additionally has a filter 233 compared to the second circuit 24, when the switch 22 switches the power supply 21 to provide power for the image sensor 10 through the first circuit 23, the filter 233 can filter out the noise or other unnecessary electrical signals of the power supply 21, thereby avoiding the noise of the image acquired by the image sensor 10, but because the filter 233 needs power for noise processing, the power loss of the power supply 21 connected to the image sensor 10 through the first circuit 23 will be greater than the power loss of the power supply 21 connected to the image sensor 10 through the second circuit 24.

[0038] As shown Figure 1 As shown Figure 2 As shown, the controller 25 is electrically connected to the switch 22, and the controller 25 can control the switch 22 to switch the first circuit 23 or the second circuit 24 to electrically connect the power supply 21 according to the ambient brightness value. Thus, the camera 1 of the embodiment of the present application can switch the first circuit 23 or the second circuit 24 to electrically connect the power supply 21 in real time through the controller 25 according to the brightness change of the current use situation, so that the power supply 21 is connected to the image sensor 10 through the most suitable circuit, thereby optimizing the quality of the acquired image and reducing the energy consumption of the camera 1.

[0039] For example, when the camera 1 is used in a general ambient brightness (for example, the ambient brightness value is between 100 lux and 500 lux), the noise of the image acquired by the image sensor 10 caused by the power supply 21 will not be easily detected because the ambient brightness is large. Conversely, when the camera 1 is used in a low ambient brightness (for example, the ambient brightness value is below 20 lux), in order to improve the picture clarity, the exposure gain of the image sensor 10 will be increased, and the noise of the image of the image sensor 10 caused by the power supply 21 will be easily shown. Therefore, the controller 25 can control the switch 22 to switch the first circuit 23 to electrically connect the power supply 21 when the ambient brightness value is less than a set brightness value (for example, 20 lux) (as shown Figure 1As shown), the power supply 21 provides power to the image sensor 10 via the first circuit 23, so that noise or other unnecessary electrical signals from the power supply 21 are filtered out by the filter 233, thereby optimizing the quality of the image acquired by the image sensor 10. The controller 25 can control the switch 22 to switch the electrical connection of the second circuit 24 to the power supply 21 when the ambient brightness value is greater than a set brightness value (e.g., 20 lux). Figure 2 As shown), the power supply 21 provides power to the image sensor 10 via the second circuit 24 to reduce the power consumption of the camera 1.

[0040] Figure 3 This is a hardware block diagram of the second embodiment of the power supply device of this utility model. Figure 4 This is a hardware block diagram of the third embodiment of the power supply device of this utility model. Figure 3 As shown, in this embodiment, the controller 25 may include a light sensing unit 251, which can continuously sense the ambient brightness value. The controller 25 can compare the ambient brightness value sensed by the light sensing unit 251 with the set brightness value, and control the switch 22 to switch the first circuit 23 or the second circuit 24 to be electrically connected to the power supply 21.

[0041] In some embodiments, the light sensing unit 251 may also generate a voltage signal based on the ambient brightness value, so as to control the switching switch 22 to switch the electrical connection of the first circuit 23 or the second circuit 24 to the power supply 21. For example, Figure 4 As shown, the light sensing unit 251 may include only a photoresistor 252, which is a component that can change its resistance value according to the light intensity. For example, the resistance value of the photoresistor 252 is larger in the aforementioned low ambient brightness (e.g., the ambient brightness value is below 20 lux), and the resistance value of the photoresistor 252 is smaller in the aforementioned general ambient brightness (e.g., the ambient brightness value is between 100 lux and 500 lux), thereby generating different voltage signals to control the operation of the switching switch 22.

[0042] Figure 5 This is a circuit diagram of the photosensitive unit in the third embodiment of the power supply device of this utility model. Figure 6 This is a voltage change diagram of the photosensitive unit in the third embodiment of the power supply device of this utility model. (See diagram below.) Figure 4 to Figure 6As shown, in the present embodiment, the light sensing unit 251 comprises a photoresistor 252 and a fixed resistor 253, which are connected in series. The voltage V at the node between the photoresistor 252 and the fixed resistor 253 can change according to different ambient brightness, and the voltage V at the node can be used as the control signal of the switch 22. In other words, the aforementioned voltage signal can be the voltage V at the node between the photoresistor 252 and the fixed resistor 253. For example, as shown in Figure 5 When the intensity of the ambient light received by the photoresistor 252 is weak (e.g. the brightness of the ambient light is below 20 lux), the impedance of the photoresistor 252 will increase, so that the voltage V at the node (here, 4.95 volts) is greater than the set voltage value. At this time, the voltage V at the node can control the switch 22 to switch the first circuit 23 to be electrically connected to the power supply 21. Conversely, as shown in Figure 6 When the intensity of the ambient light received by the photoresistor 252 is strong (e.g. the brightness of the ambient light is between 100 lux and 500 lux), the impedance of the photoresistor 252 will decrease, so that the voltage V at the node (here, 0.24 volts) is less than the set voltage value. At this time, the voltage V at the node can control the switch 22 to switch the second circuit 24 to be electrically connected to the power supply 21.

[0043] In some embodiments, the controller 25 can also control the switch 22 to switch the first circuit 23 or the second circuit 24 to be electrically connected to the power supply 21 according to the image brightness value of the image acquired by the image sensor 10. As shown in Figure 7 As shown, the hardware block diagram of the fourth embodiment of the power supply device of the present application, in the present embodiment, the controller 25 comprises an image processing unit 255 (Image Processor), which is electrically connected to the image sensor 10 to receive the image transmitted from the image sensor 10, and the image processing unit 255 can acquire the image brightness value according to the image. When the image brightness value is less than the preset value (i.e. the camera 1 is used under low ambient brightness), the controller 25 can control the switch 22 to switch the first circuit 23 to be electrically connected to the power supply 21, so that the power supply 21 provides power to the image sensor 10 through the first circuit 23 to filter out the noise or other unnecessary electrical signals of the power supply 21, thereby optimizing the quality of the image acquired by the image sensor 10. When the image brightness value is greater than the preset value (i.e. the camera 1 is used under general ambient brightness), the controller 25 can control the switch 22 to switch the second circuit 24 to be electrically connected to the power supply 21 (as shown in Figure 2 ), so that the power supply 21 provides power to the image sensor 10 through the second circuit 24 to reduce the power consumption of the camera 1.

[0044] In conclusion, according to the camera of the embodiment of the utility model, the controller of the power supply device can control the switching switch to switch the first circuit or the second circuit with different power consumption to be electrically connected to the power supply, so that the power supply can be matched with different situations, connected to the image sensor through a suitable circuit, and the quality of the obtained image is optimized and the energy consumption of the camera is reduced.

[0045] Although the technical content of the utility model has been disclosed as above with the preferred embodiment, it is not used to limit the utility model, and any modification and change made by the ordinary skilled in the art without departing from the spirit of the utility model should be covered in the scope of the utility model, so the protection scope of the utility model should be defined according to the appended claims.

Claims

1. A power supply device characterized by comprising: The application relates to a power supply device, comprising: a power supply; a switch connected to the power supply; a first circuit having a first connection end, a second connection end and a filter between the first connection end and the second connection end, the first connection end being connected to the switch; a second circuit having a third connection end and a fourth connection end, the third connection end being connected to the switch; and a controller connected to the switch, the controller controlling the switch to connect the first circuit or the second circuit to the power supply according to an ambient brightness value or an image brightness value. When the ambient brightness value is less than a set brightness value, the controller controls the switch to connect the first circuit to the power supply; when the ambient brightness value is greater than the set brightness value, the controller controls the switch to connect the second circuit to the power supply.

2. The power supply apparatus of claim 1, wherein The controller comprises a light sensing unit for sensing the ambient brightness value.

3. The power supply apparatus of claim 1, wherein The light sensing unit generates a voltage signal according to the ambient brightness value, the voltage signal controlling the switch to connect the first circuit or the second circuit to the power supply.

4. The power supply apparatus of claim 3, wherein The light sensing unit comprises a photoresistor.

5. The power supply apparatus of claim 4, wherein The light sensing unit comprises a fixed resistor connected to the photoresistor.

6. The power supply apparatus of claim 5, wherein The voltage signal is the voltage of a node between the photoresistor and the fixed resistor.

7. The power supply apparatus of claim 6, wherein The controller comprises an image processing unit receiving an image, the image processing unit obtaining the image brightness value according to the image.

8. The power supply apparatus of claim 1, wherein When the image brightness value is less than a preset value, the controller controls the switch to connect the first circuit to the power supply; when the image brightness value is greater than the preset value, the controller controls the switch to connect the second circuit to the power supply.

9. The power supply apparatus of claim 1, wherein ​

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