CN201360158Y - Digital photo frame based on battery power supply - Google Patents

Abstract

The utility model discloses a digital photo frame based on battery power supply, which comprises a power adapter and a digital photo frame; the device is characterized by also comprising a battery, a battery power supply control circuit, a battery charging circuit and a DSP; the battery is connected to the digital photo frame through the battery power supply control circuit, the control end of the battery power supply control circuit is connected to the power adapter, the battery and the digital photo frame form a loop when no power adapter is connected, and the battery and the digital photo frame are disconnected when the power adapter is connected; the detection signal detection end of the DSP is connected to the output end of the battery, and the control signal output end is connected to the control end of the battery charging circuit; the DSP is also connected with the controller of the digital photo frame and sends a standby signal to the controller. The digital photo frame product with the built-in lithium battery has the characteristics of intelligence, flexibility, strong portability and the like, and is suitable for being widely used in daily entertainment life of people.

Description

Battery-powered digital photo frame

technical field

The utility model relates to a digital photo frame, in particular to a digital photo frame based on battery power supply.

Background technique

In recent years, with the rapid development of digital photography technology, the development of digital photo frames will inevitably be promoted, because less than 35% of digital photos are printed in the world, and this type of products is more flexible than ordinary photo frames, and it also gives a boost to the increasingly used digital photos. A new display space for photos, but the use of the current digital photo frame must use the corresponding adapter to connect to the power supply, which greatly reduces the flexibility and portability of the digital photo frame; so it is urgent to develop a more convenient digital photo frame needs.

Contents of the invention

The utility model aims at the proposal of the above subject, and develops a kind of digital photo frame with built-in lithium battery. Built-in lithium battery digital photo frame is to add lithium battery and related lithium battery charging and discharging circuit, battery protection circuit, etc. on the basis of digital photo frame. When the photo frame is turned on, it is automatically powered by the built-in lithium battery. The use time of the digital photo frame powered by the lithium battery is determined by the capacity of the battery and the power consumption of the digital photo frame. The power consumption of the whole machine, when working with lithium batteries, the digital photo frame will automatically detect the battery power. When the battery voltage is lower than a certain value, it will automatically prompt that the battery is low and turn off the digital photo frame to avoid battery over-discharge and damage the battery. When the adapter is used to connect to the power supply, the digital photo frame will automatically detect the adapter and automatically provide the power supply of the digital photo frame from the adapter, and at the same time automatically detect the battery voltage. When the battery voltage is lower than the battery saturation voltage, it will automatically charge the battery. The indicator light will be on, and when the battery voltage is at the saturation value, it will automatically stop charging to avoid battery overcharging and damage the battery, and the corresponding indicator light will be off. The technical means adopted in the utility model are as follows:

A battery-powered digital photo frame, including a power adapter and a digital photo frame; it is characterized in that it also includes a battery, a battery-powered control circuit, a battery charging circuit and a DSP; the battery is connected to the digital photo frame through a battery-powered control circuit, and the battery-powered control circuit The control end of the circuit is connected to the power adapter. When no power adapter is connected, the battery forms a circuit with the digital photo frame. When the power adapter is connected, the battery and the digital photo frame are disconnected; the detection signal detection end of the DSP is connected to the output of the battery. The control signal output terminal is connected to the control terminal of the battery charging circuit; the DSP is also connected to the controller of the digital photo frame to send a standby signal to it. The battery adopts a lithium battery; the battery power supply control circuit adopts a MOS tube as a control element; a charge status indicator light is also provided and connected to the DSP.

Due to the adoption of the above-mentioned technical scheme, the battery-powered digital photo frame provided by the utility model increases the flexibility and portability of the digital photo frame through battery power supply; and uses the detection DSP to make it intelligent, and is suitable as the traditional structure of the present invention. It is widely promoted as an updated product of the digital photo frame.

Description of drawings

The utility model has only one accompanying drawing:

Fig. 1 is a block diagram of the circuit structure of the utility model.

In the figure: 10, battery, 11, battery power supply control circuit, 12, battery charging circuit, 13, charging status indicator light, 14, DSP, 15, power adapter, 16, digital photo frame.

Detailed ways

Built-in battery digital photo frame as shown in Figure 1, comprises power adapter 15, digital photo frame 16, battery 10, battery supply control circuit 11, battery charging circuit 12 and DSP 14, and charging state indicator light 13; Wherein DSP 14 is used for battery Detection of charging or over-discharge status and control of the opening of the battery charging circuit and the standby and opening of the digital photo frame; the battery power supply control circuit 11 automatically controls the power supply of the battery 10 through the power adapter 15, and when the power adapter 15 is not connected, the battery 10 automatically supplies power to the digital photo frame 16. When the battery 10 is in the power supply state, the DSP 14 automatically detects the power of the battery 10. When the power is low, the DSP 14 automatically gives a prompt and is in a standby state to protect the battery 10 from over-discharging. When a power adapter 15 is connected When the battery power supply control circuit 11 is automatically turned off, the DSP 14 detects the battery power at the same time. When the battery power is not in a saturated state, the battery charging circuit 12 automatically charges the battery, and the charging status indicator 13 gives a corresponding indication. When the battery power is in saturation state, the battery charging circuit 12 is automatically turned off, and the charging status indicator light 13 gives corresponding indications.

According to the type of existing batteries, the battery 10 in the utility model adopts a lithium battery through cost-effectiveness; in the battery power supply control circuit 11, a MOS tube is used as a control element; The power required for the photo frame 16 work is provided by the power adapter power supply, and the power adapter 15 is provided to the battery charging circuit at the same time, and the voltage of the battery is connected to the A/D port of the DSP 14 after being divided by a resistor. When the value is set, the system assumes that the battery is in an unsaturated state by default. The DSP 14 generates a PWM signal through the CHARGE port of the battery charging circuit to charge the battery, and at the same time generates a high voltage through the GPIO port connected to the charging status indicator (LED). Light up the charging status indicator (LED). When the voltage detected by the A/D port is equal to a certain value, the system assumes that the battery is in a saturated state, and the CHARGE port does not generate PWM signals, so that the battery charging circuit is not working and protected. The battery is overcharged, and the level of the GIPO port connected to the LED becomes low at the same time, and the LED goes out. When no adapter is connected, the MOS tube is in the conduction state, and the power required for the digital photo frame 16 to work is provided by the lithium battery. At the same time, the A/D port of the DSP monitors the battery voltage. When the voltage detected by the A/D port is equal to or lower than a When the value is set, the system defaults to the over-discharge state of the battery, and a low-battery prompt appears on the display interface, and the DSP is automatically in standby mode to protect the battery from over-discharge.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Any equivalent replacement or change of the new technical solution and its inventive concept shall be covered by the protection scope of the present utility model.

Claims (3)

1, a kind of digital photo frame based on battery power supply, comprises power adapter (15) and digital photo frame (16); It is characterized in that also comprising battery (10), battery power supply control circuit (11), battery charging circuit (12) and DSP ( 14); described battery (10) is connected on the digital photo frame (16) by battery-powered control circuit (11), and the control terminal of battery-powered control circuit (11) is connected on the power adapter (15), when there is no power adapter ( 15) Battery (10) constitutes a loop with the digital photo frame (16) during access, and when a power adapter (15) is inserted, the battery (10) is disconnected with the digital photo frame (16); the detection signal of the DSP (14) detects terminal is connected to the output terminal of the battery (10), and the control signal output terminal is connected to the control terminal of the battery charging circuit (12); the DSP (14) is also connected with the controller of the digital photo frame (16) to send Standby signal. 2. The battery-powered digital photo frame according to claim 1, wherein the battery (10) is a lithium battery; the battery-powered control circuit (11) uses a MOS transistor as a control element. 3. The battery-powered digital photo frame according to claim 1, characterized in that there is also a charging status indicator (13) connected to the DSP (14).