TW201312532A - Control method for charging external device during standby of display equipment - Google Patents

Abstract

A control method for charging an external device when a display equipment is in a standby mode is disclosed. The display equipment supplies a power-on power source in a power-on mode, and supplies a standby power source in a standby mode, wherein the power-on power source and the standby power source are both applicable for charging the external device. The control method of the display equipment comprises the following steps: (a) the display equipment receiving an external operation command; (b) according to the operation command, the display equipment selecting either the standby power source or the power-on power source as the output via a power pin of a standard interface; and (c) electrically connecting the external device to the standard interface of the display equipment, so as to charge the external device by either the standby power source or the power-on power source.

Description

Control method for charging an external device when the device is in standby

The present invention relates to a control method for a display device, and more particularly to a control method for charging an external device when the display device is in standby.

Referring to FIG. 1 , a liquid crystal display device 9 includes a power circuit 91 , a main power converter 92 , a standby power converter 93 , a backlight module 95 , a video module 96 , and a microprocessor 98 .

The power circuit 91 has a filter circuit, a rectifier circuit and a power factor controller (PFC). The filter circuit is an electromagnetic interference that receives the mains and filters out the alternating current. The rectifier circuit converts the alternating current voltage into a direct current voltage, and the power factor is corrected by the power factor controller. It is sent to the main power converter 92 and the standby power converter 93.

The main power converter 92 performs power conversion in the power on mode to convert the DC voltage to the main power supply +24V and +12V output, and stops the power conversion in the standby mode without outputting the main power supply +24V and +12V. The main power supply +24V is converted into a high-voltage AC voltage through the inverter of the backlight module 95 to illuminate the backlight source of the liquid crystal display; the main power supply +12V is an audio amplifier and audio-visual processing circuit that supplies power to the audio-visual module 96; The standby power converter 93 can perform power conversion to convert the DC voltage to the standby power supply +5V output regardless of the power-on mode or standby mode (stand by), and the standby power supply +5V is supplied to the microprocessor 98, enabling micro The processor 98 can accept operations even in the standby mode.

The microprocessor 98 is configured to monitor whether to press the power button on the remote controller or the control panel, and then send the power switch signal PS to control the power circuit 91 to switch between the power-on mode and the standby mode; for example, the microprocessor 98 controls the power in the power-on mode. The circuit 91 DC power is supplied to the main power converter 92 to cause the main power converter 92 to perform power conversion to output the main power supply +24V and +12V; when operating in the standby mode, the microprocessor 98 controls the power supply circuit 91 not to supply power to the main power supply. The converter 92 causes the main power converter 92 to stop the power conversion and turn off the operation of the video module 96.

However, as the number of portable electronic products in the home increases, the charging demand is also greatly increased. It is assumed that a standard device is required to charge the external device on the display device 9, and a set needs to be in either the power-on mode or the standby mode. A powerable solution.

Accordingly, it is an object of the present invention to provide a control method for a display device that cannot supply power to an external device in a standby mode.

Therefore, in the control method for the external device to be charged when the device is in standby, the display device has a standard interface, supplies a power-on power in the power-on mode, and supplies a standby power source in the standby mode, and the power-on power source and the standby power source Suitable for charging the external device, the control method of the display device comprises the steps of: (a) the display device receiving an operation instruction from the outside; (b) the display device according to the operation instruction for the standby power source or the power on The power source is selectively outputted to the power pin of the standard interface; and (c) the external device is electrically connected to a standard interface of the display device, so that the external device selects the output power by using the standby power source or the power-on power source. Charging.

The utility model has the advantages that the control method for charging the external device when the device is in standby is that the problem that the standby mode cannot be powered through the standard interface can be solved, and the power supply of the power on/off standby power is automatically switched with the user's power on/off operation, without additional The menu operation can save the user's operation time.

The above and other technical features, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 2, in a preferred embodiment of the present invention, the display device 100 is electrically connected to an external device 5.

The display device 100 includes a main power converter 21, a standby power converter 22, a control module 10, an input module 11, a power supply circuit 12, and a standard interface 13, each of which is described below.

When the display device 100 is in the power-on mode, a power-on power supply +5V is supplied from the main power converter 21, and the power-on power supply +5V can be converted by the output voltage of the main power converter 21 or a main power conversion controller having a +5V output voltage. When the display device 100 is in the standby mode, a standby power supply +5V is supplied from the standby power converter 22, and the power-on power +5V and the standby power +5V are suitable for charging the external device 5.

The input module 11 is an operation instruction for accepting a user's operation to generate a pair of power on/off and other functions of the display device 100. In the preferred embodiment, the input module 11 is electrically connected to the control module 10. A wireless receiver (such as an infrared receiver of an infrared remote controller), in other embodiments, may also be a button (such as: display power button of the control panel), mainly to generate a power on/off operation command to make the control module 10 is in power on mode or power off mode.

The control module 10 is electrically connected to the main power converter 21, the standby power converter 22, the input module 11 and the power supply circuit 12. The control module 10 includes a standby output of +5V or a power supply +5V according to an operation command. The switching circuit 106 includes a power-on power terminal 101, a standby power terminal 102, a signal input terminal 103 for receiving the operation command supply switching circuit 106, and a power source output terminal 104. The principle is explained as follows.

The standby power terminal 101 receives the standby power supply +5V, the power supply terminal 102 receives the power supply +5V, the signal input terminal 103 accepts the operation command of the input module 11, and the switching circuit 106 operates the standby power supply +5V or the power supply according to the operation instruction. 5V selects an output, the power output terminal 104 is electrically connected to the power supply circuit 12, and the standby power supply +5V or the power-on power supply +5V selected by the switching circuit 106 is transmitted to the power supply circuit 12.

The power supply circuit 12 is electrically connected between the standard interface 13 and the control module 10, mainly for transmitting the power output from the control module 10 to the power pin of the standard interface 13, and the standard interface 13 is the same standard specification as the external device 5. The connection interfaces (not shown) are connected to each other, and the types of the standard interface 13 in this embodiment are described below.

In this embodiment, the standard interface 13 is a USB interface, and other embodiments may also be an HDMI interface or a DVI interface. The HDMI interface, the DVI interface, and the USB interface are similar in that they include a power source for transmitting data signals and transmitting power. In the case of the power pin, the USB interface 113 is defined as a +5V DC power supply in the first pin, the HDMI interface is defined as a +5V DC power supply in the 18th pin, and the DVI interface is in the 14th pin. The foot is defined as a +5V DC power supply. It should be noted that in other embodiments, the corresponding power pin connection may be used, and the specification of the pin is not limited.

There are two embodiments in terms of protection circuit design to avoid short circuit or excessive transmission power, which are respectively described below.

Referring to FIG. 3, in the first embodiment, the display device 100' also has an element similar to that of FIG. 2, except that the power supply circuit 12' has a protection circuit 15', which is protected from the control module 10' by the protection circuit 15'. The short circuit of the transmission power or the excessive voltage or current causes the external device 5 to be damaged. The protection circuit 15' can be designed as a power management integrated circuit (IC), and the power management integrated circuit has an output pin 121 connected to the control module 10 a power monitoring integrated circuit 105 can set a predetermined value. If the signal value outputted by the power output terminal 104 of the control module 10' exceeds a predetermined value or does not reach a predetermined value, the power management integrated circuit determines that The abnormality, and then the monitoring signal for transmitting the abnormal state is notified to the monitoring terminal 105 of the control module 10', and the control module 10' can learn the fault and perform protection measures.

Referring to FIG. 4, in the second embodiment, the control module 10" of the display device 100" integrates a protection circuit 15" at the front end of the power output terminal 104. The protection circuit 15" prevents the output power from being short-circuited or the voltage or current is too large. Device 5 is damaged.

Referring to FIG. 5, in conjunction with FIG. 2, in the control method of the display device 100 of the present invention, the display device 100 supplies the power-on power supply +5V in the power-on mode and the standby power supply +5V in the standby mode, and the power-on power supply +5V and the standby power supply + 5V is suitable for charging the external device 5, and the control method of the display device 100 is explained as follows.

The input module 11 of the display device 100 receives an operation command from the outside (step 501); the control module 10 of the display device 100 selectively outputs the standby power or the power-on power to the standard interface 13 according to the operation command (step 503), the standard The interface 13 is an HDMI interface, a DVI interface or a USB interface for transmitting a data signal, and has a power pin for transmitting power; then, the external device 5 is electrically connected to the standard interface 13 of the display device 100 and charged (step 503). The external device 5 can be charged by the standby power + 5V output power even during standby.

Preferably, the operation instruction of the step (a) is a shutdown command, and the display device 100 is switched from the power-on mode to the standby mode, and the power-on power is switched to the power supply pin of the standby power output to the standard interface 13; The display device 100 also sets a predetermined value. If the signal value of the power pin exceeds a predetermined value or does not reach a predetermined value, it is determined to be abnormal and protected.

In summary, the control method of the display device 100 of the present invention for charging the external device 5 during standby is effective in that it not only solves the problem that the standby mode cannot be powered through the standard interface 13, but also automatically switches the booting operation according to the user's power on/off operation. / The power supply of the standby power supply can save the user's operation time without additional menu operation, so the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

[知知]

9. . . Liquid crystal display device

91. . . Power circuit

92. . . Main power converter

93. . . Standby power converter

95. . . Backlight module

96. . . Audio and video module

98. . . microprocessor

[This creation]

100, 100', 100"... display device

10, 10', 10"... control module

11. . . Input module

12, 12’. . . Power supply loop

13. . . Standard interface

15', 15"... protection circuit

101. . . Power on

102. . . Standby power terminal

103. . . Signal input

104. . . Power output

105. . . Monitoring side

106. . . Switching circuit

twenty one. . . Main power converter

twenty two. . . Standby power converter

5. . . External device

501~503. . . step

1 is a system block diagram illustrating a power supply mode of a conventional display device;

2 is a system block diagram showing a preferred embodiment of a display device for charging an external device during standby;

3 is a system block diagram showing a first embodiment of a protection circuit design for avoiding a short circuit or an excessive transmission power of the display device of the present invention;

4 is a system block diagram showing a second embodiment of a protection circuit design for avoiding a short circuit or an excessive transmission power of the display device of the present invention;

Fig. 5 is a flow chart showing a preferred embodiment of a control method for charging an external device while the display device of the present invention is in standby.

501~503. . . step

Claims (3)

A control method for charging an external device when the display device is in standby mode, the display device having a standard interface, supplying a power-on power in the power-on mode and supplying a standby power source in the standby mode, and the power-on power source and the standby power source are adapted to The external device is charged, and the control method of the display device comprises the following steps: (a) the display device receives an operation command from the outside; (b) the display device switches from the power-on mode to the standby mode according to the operation command, and Switching the power-on power to the standby power source to the power connector of the standard interface; and (c) electrically connecting the external device to the standard interface of the display device, so that the external device is charged by the standby power source. The control method for charging an external device when the display device is in standby according to the first aspect of the patent application, wherein the operation command of the step (a) is a shutdown command. The control method for charging an external device when the display device is in standby according to the second aspect of the patent application, wherein the display device of the step (c) further sets a predetermined value, if the signal value of the power pin exceeds a predetermined value. Or if the predetermined value is not reached, it is judged to be abnormal and protected.