CN104795849A - Charging indicating device and method - Google Patents

Abstract

The invention provides a charging indicating device and a charging indicating method. And frequency division is carried out on the switching signal for controlling the operating frequency of the power supply conversion circuit to obtain a frequency division signal, and the backlight module is controlled to send out a backlight light source as a charging indication signal according to the frequency division signal.

Description

Charging indicating device and method

technical field

The present invention relates to an electronic device, and in particular to a charging indicating device and method.

Background technique

Today's electronic products, such as mobile phones or tablet computers, when the battery power is below a certain threshold, even if the charger is plugged in for charging, it will not be able to turn on due to the limited output energy of the charger, and users will not be able to press any button to generate power. any response. It must be charged continuously for 2 to 3 minutes, so that the battery can store enough power to provide the transient energy needed for the moment of starting up. For example, let the battery charge to 3% or higher before starting up smoothly. However, there are currently many electronic products on the market without any indicator lights. Therefore, when the above-mentioned battery power is insufficient, even if the user presses the power button in the charging state, it cannot be turned on, and it is impossible to tell whether the system is normal from the lights. Therefore, it is easy to cause confusion for users.

Contents of the invention

The present invention provides a charging indicating device and method, which can display the charging status of an electronic device using the charging indicating device and method when the power is lower than the transient energy required at the moment of starting up.

The charging indicating device of the present invention is suitable for an electronic device, and the charging indicating device includes a backlight module, a frequency dividing unit and a backlight controller. The frequency-dividing unit divides the switching signal used to control the operating frequency of the power conversion circuit to generate a frequency-divided signal. The backlight controller is coupled to the backlight module and the frequency division unit, and controls the backlight module to emit a backlight light source as a charging instruction signal according to the frequency division signal.

In an embodiment of the present invention, the above-mentioned backlight module includes a plurality of LED units, and the backlight controller includes a driving unit and a plurality of switches. The driving unit is coupled to the plurality of LED units, and drives the plurality of LED units to emit backlight. The plurality of switches are arranged on the connection path between the plurality of light-emitting diode units and the driving unit, and the conduction states of these switches are controlled by the frequency-dividing signal.

In an embodiment of the present invention, the above-mentioned frequency-dividing signal includes a plurality of frequency-dividing sub-signals, and each frequency-dividing sub-signal has a different frequency.

In an embodiment of the present invention, the above charging indicating device further includes a liquid crystal panel and a timing controller. The timing controller is coupled to the frequency division unit and the liquid crystal panel, and controls the liquid crystal panel to display a preset image according to the frequency division signal.

In an embodiment of the present invention, the above-mentioned default image is a monochrome image.

In an embodiment of the present invention, the above-mentioned frequency dividing unit is a counter.

The charging indicating method of the charging indicating device of the present invention is suitable for electronic devices, and the charging indicating method includes the following steps. The frequency division is used to control the switching signal of the operating frequency of the power conversion circuit to generate the frequency division signal. According to the frequency-dividing signal, the backlight module of the electronic device is controlled to emit a backlight light source as a charging indication signal.

In one embodiment of the present invention, the above-mentioned backlight module includes a plurality of light-emitting diode units, and the step of controlling the backlight module of the electronic device to emit backlight light sources according to the frequency-dividing signal includes: controlling the above-mentioned multiple light-emitting diode units according to the frequency-dividing signal. Different light emitting frequencies are used to emit light.

In an embodiment of the present invention, the above-mentioned backlight module includes a plurality of light-emitting diode units, and the step of controlling the backlight module of the electronic device to emit backlight light sources according to the frequency-dividing signal includes: The unit emits light.

In an embodiment of the present invention, the above charging instruction method further includes controlling the liquid crystal panel of the electronic device to display a preset image according to the frequency-dividing signal.

In an embodiment of the present invention, the above-mentioned default image is a monochrome image.

Based on the above, the embodiment of the present invention divides the switching signal controlling the operating frequency of the power conversion circuit to obtain a frequency-divided signal, and controls the backlight module to emit a backlight light source as a charging indication signal according to the frequency-divided signal. In this way, the electronic device using the charging indicating device and the method thereof can also display its charging status when the power is lower than the transient energy required at the moment of power-on.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 shows a schematic diagram of a charging indicating device according to an embodiment of the present invention;

Fig. 2 shows a schematic diagram of a charging indicating device according to another embodiment of the present invention;

Fig. 3 shows a schematic diagram of a charging indicating device according to another embodiment of the present invention;

Fig. 4 shows a schematic diagram of a charging indicating method of a charging indicating device according to an embodiment of the present invention;

Fig. 5 shows a schematic diagram of a charging indicating method of a charging indicating device according to another embodiment of the present invention.

Explanation of reference signs:

102: frequency division unit;

104: backlight controller;

106: backlight module;

202: drive unit;

302: timing controller;

304: liquid crystal panel;

S1: switching signal;

S2: frequency division signal;

SW1～SW3: switch;

D1～D3: LED unit;

SC1～SC3: sub frequency division signal;

S402-S404, S502: steps of the charging instruction method of the charging instruction device.

Detailed ways

FIG. 1 shows a schematic diagram of a charging indicating device according to an embodiment of the present invention, please refer to FIG. 1 . The charging indicator device can be applied to portable electronic devices such as mobile phones, tablet computers or notebook computers, for example. The charging indicator device includes a frequency dividing unit 102, a backlight controller 104 and a backlight module 106, wherein the backlight controller 104 is coupled to the frequency dividing unit 102 and a backlight module 106 . The frequency division unit 102 can receive the switching signal S1 and divide it to generate a frequency division signal S2. The frequency division unit 102 can be, for example, a counter, but it is not limited thereto. The switching signal S1 is used to control switching the operating frequency of a power conversion circuit (not shown) of the electronic device, and the power conversion circuit is used to convert the voltage provided by the battery of the electronic device into the voltage required by the internal circuits of the electronic device. The backlight controller 104 can control the backlight module 106 to emit a backlight light source as a charging indication signal according to the frequency-dividing signal S2.

As mentioned above, since the voltage required to drive the backlight controller 104 to control the backlight module 106 to emit the backlight light source is much smaller than the instantaneous voltage required for power-on, even if the battery power of the electronic device is lower than the voltage required for power-on, the backlight control can still The device 104 directly drives the backlight module 106 to emit backlight light to indicate the charging status of the user's electronic device. In addition, since this embodiment simply uses the backlight light source emitted by the backlight module as an indication signal, it is not necessary to install additional chips in the electronic device to control the liquid crystal display panel of the electronic device to display complicated charging indication patterns (such as displaying a battery pattern), which can save the manufacturing cost of the electronic device.

FIG. 2 shows a schematic diagram of a charging indicating device according to another embodiment of the present invention, please refer to FIG. 2 . In this embodiment, the backlight controller 104 may include a driving unit 202 and a plurality of switches SW1 - SW3 , and the backlight module 106 may include a plurality of LED units D1 - D3 . The switches SW1-SW3 are respectively disposed between the corresponding LED units D1-D3 and the driving unit 202, the switches SW1-SW3 can be implemented as transistors, such as shown in FIG. It is composed of multiple light emitting diodes, but it is not limited thereto.

The driving unit 202 is coupled to the LED units D1-D3, and the driving unit 202 can drive the LED units D1-D3 to emit backlight. The frequency dividing unit 102 can divide the switching signal S1 to generate a plurality of frequency dividing sub-signals SC1 - SC3 with different frequencies, and the conduction states of the switches SW1 - SW3 are respectively controlled by the frequency dividing sub-signals SC1 - SC3 . In this way, the conduction states of the switches SW1-SW3 are controlled by the frequency-dividing sub-signals SC1-SC3 of different frequencies, so that the light-emitting diode units D1-D3 can be lit at different times, thereby achieving a display effect like a marquee, and then borrowing This informs the user of the charging status of the electronic device.

It should be noted that the above embodiment only uses three switches SW1-SW3 and three light-emitting diode units D1-D3 as examples for illustration, but it is not limited thereto. In practical applications, the charging indicating device may also include more switch with LED unit. In addition, in some embodiments, some of the switches SW1-SW3 can also be completely turned off or turned on to indicate the charging status of the electronic device by means of local dimming.

FIG. 3 shows a schematic diagram of a charging indicating device according to another embodiment of the present invention, please refer to FIG. 3 . In this embodiment, the charging indicating device further includes a timing controller 302 and a liquid crystal panel 304 , wherein the timing controller 302 is coupled to the frequency dividing unit 102 and the liquid crystal panel 304 . The timing controller 302 can control the liquid crystal panel 304 to cooperate with the backlight module 106 to display a simple preset image according to the frequency division signal S2 output by the frequency division unit 102 , such as a monochrome image of all white or blue. Since the timing controller 302 can display the preset image without additionally setting a chip in the electronic device, the manufacturing cost of the electronic device can still be saved, and the liquid crystal molecules in the liquid crystal panel can be rearranged to prevent the electronic device from displaying A distorted picture.

FIG. 4 shows a schematic diagram of a charging indicating method of a charging indicating device according to an embodiment of the present invention. The charging instruction method of the above-mentioned charging instruction device may include the following steps. Firstly, the frequency-divided switching signal for switching the operating frequency of the power conversion circuit is frequency-divided to generate a frequency-divided signal (step S402 ). Next, control the backlight module of the electronic device to send a backlight light source as a charging instruction signal according to the frequency-dividing signal (step S404 ). Wherein the backlight module may include a plurality of light-emitting diode units, and when the backlight module of the electronic device is controlled to emit backlight light sources according to the frequency-dividing signal, for example, the plurality of light-emitting diode units may be controlled to emit light at different light-emitting frequencies to achieve a display like a marquee effect, thereby informing the user of the charging status of the electronic device. In other embodiments, only a part of the LED units can be controlled to emit light, and the charging status of the user's electronic device can be indicated by means of regional dimming.

FIG. 5 shows a schematic diagram of a charging indicating method of a charging indicating device according to another embodiment of the present invention, please refer to FIG. 5 . The difference between the charging indicating method of the charging indicating device of this embodiment and the embodiment shown in FIG. Preset image (step S502 ), wherein the preset image can be, for example, a white or blue monochrome image, so as to prevent the electronic device from displaying a distorted image when controlling the backlight module to emit backlight in step S404 .

In summary, the present invention divides the switching signal for controlling the operating frequency of the power conversion circuit to obtain the frequency-divided signal, and controls the backlight module to send the backlight light source as the charging indication signal according to the frequency-dividing signal, so that the charging indication can be applied. The electronic device of the device and its method can also display its charging state when the electric power is lower than the transient energy required at the moment of power-on, and simultaneously save the manufacturing cost of the electronic device. In some embodiments, the liquid crystal panel can be controlled to cooperate with the backlight module to display a preset image according to the frequency-dividing signal, so as to prevent the electronic device from displaying a distorted image while displaying the charging indication signal.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (11)

1. A charging indicating device, suitable for an electronic device, characterized in that the charging indicating device comprises: a backlight module; a frequency dividing unit, which frequency divides a switching signal used to control the operating frequency of a power conversion circuit to generate a frequency dividing signal; and A backlight controller, coupled to the backlight module and the frequency division unit, controls the backlight module to emit a backlight light source as a charging instruction signal according to the frequency division signal. 2. The charging indicating device according to claim 1, wherein the backlight module comprises a plurality of LED units, and the backlight controller comprises: a driving unit, coupled to the light emitting diode units, drives the light emitting diode units to emit the backlight; and A plurality of switches are arranged on the connection path between the light emitting diode units and the drive unit, and the conduction state of the switches is controlled by the frequency division signal. 3 . The charging indicating device according to claim 2 , wherein the frequency-dividing signal comprises a plurality of frequency-dividing sub-signals, and each of the frequency-dividing sub-signals has a different frequency. 4. The charging indicating device according to claim 1, further comprising: a liquid crystal panel; and A timing controller is coupled to the frequency division unit and the liquid crystal panel, and controls the liquid crystal panel to display a preset image according to the frequency division signal. 5. The charging indicating device according to claim 4, wherein the default image is a monochromatic image. 6. The charging indicating device according to claim 1, wherein the frequency dividing unit is a counter. 7. A charging indicating method for a charging indicating device, suitable for an electronic device, characterized in that the charging indicating method comprises: frequency-dividing a switching signal for controlling the operating frequency of a power conversion circuit to generate a frequency-dividing signal; and A backlight module of the electronic device is controlled to emit a backlight light source as a charging indication signal according to the frequency division signal. 8. The charging indication method according to claim 7, wherein the backlight module comprises a plurality of LED units, and the step of controlling the backlight module of the electronic device to emit the backlight light source according to the frequency-dividing signal comprises: The light-emitting diode units are controlled to emit light at different light-emitting frequencies according to the frequency-dividing signal. 9. The charging indication method according to claim 7, wherein the backlight module comprises a plurality of LED units, and the step of controlling the backlight module of the electronic device to emit the backlight light source according to the frequency-dividing signal comprises: The light emitting diode units of the control part emit light according to the frequency division signal. 10. The charging indication method according to claim 7, further comprising: A liquid crystal panel of the electronic device is controlled to display a preset image according to the frequency division signal. 11. The charging instruction method according to claim 10, wherein the default image is a monochrome image.