TWI845012B - Power detection and adaptation system and power detection and adaptation method - Google Patents

Abstract

A power detection and adaptation system includes a display, a power detector and a processor. The display is configured for providing a display brightness according to an input voltage value of an electronic device. The power detector is configured to detect the input voltage value of the electronic device. The processor is configured for determining whether to enter a protection mode according to the input voltage value of the electronic device. In the protection mode, the processor adjusts the display brightness of the display to the protection brightness according to the input voltage value. The processor determines whether to enter an automatic adjustment mode according to a power detection algorithm and the input voltage value. In the automatic adjustment mode, the processor adjusts the display brightness of the display in stages to an adaptive brightness according to the power detection algorithm and the input voltage value.

Description

Power supply detection and adjustment system and power supply detection and adjustment method

This case is about a detection and adjustment system and a detection and adjustment method, and in particular, about a power supply detection and adjustment system and a power supply detection and adjustment method.

Currently, external monitors used in computers or handheld devices usually require an external power source (for example, power from the mains (110V)), which means that users need to find a socket or spend extra money to purchase an external power source for the external monitor.

Currently, when a handheld device or computer is directly plugged into an external monitor, the external monitor will have screen noise due to insufficient voltage and cannot be used normally.

The content of the invention is intended to provide a simplified summary of the disclosure so that readers can have a basic understanding of the disclosure. This content of the invention is not a complete overview of the disclosure, and it is not intended to point out the important/key elements of the embodiments of the case or to define the scope of the case.

One technical aspect of the present case is a power detection and adjustment system. The power detection and adjustment system includes a display, a power detector and a processor. The display is used to provide display brightness according to the input voltage value of the electronic device. The power detector is used to detect the input voltage value of the electronic device. The processor is used to determine whether to enter a protection mode according to the input voltage value of the electronic device. In the protection mode, the processor adjusts the display brightness of the display to the protection brightness according to the input voltage value. The processor determines whether to enter an automatic adjustment mode according to a power detection algorithm and the input voltage value. In the automatic adjustment mode, the processor adjusts the display brightness of the display to the adjusted brightness in stages according to the power detection algorithm and the input voltage value.

Another technical aspect of the present case is a power detection and adjustment method. The power detection and adjustment method includes the following steps: judging whether to enter a protection mode according to an input voltage value of an electronic device; in the protection mode, adjusting the display brightness of the display to a protection brightness according to the input voltage value; judging whether to enter an automatic adjustment mode according to a power detection algorithm and an input voltage value; and in the automatic adjustment mode, adjusting the display brightness of the display to an adjustment brightness in segments according to a power detection algorithm and an input voltage value.

Therefore, according to the technical content of this case, the power detection and adjustment system and power detection and adjustment method shown in the embodiment of this case can achieve the effect that the display can display the picture normally through the input voltage provided by the electronic device.

After reading the implementation method below, a person with ordinary knowledge in the technical field to which this case belongs should be able to easily understand the basic spirit and other invention purposes of this case, as well as the technical means and implementation methods adopted in this case.

100: Power detection and adjustment system

110: Display

111: Backlight device

112: Light-emitting element

120: Host

121: Power detector

122: Processor

123: Transmission interface

900: Electronic devices

Vi: Input voltage value

L0, L1, L2, L3, L4: brightness value

L1: Initial brightness value (brightness value)

L5: First relay brightness value (brightness value)

L45, L44: Brightness value

L43: Second relay brightness value (brightness value)

L42, L41: Final brightness value (brightness value)

13: Screen menu

131: Automatic adjustment command

400: Power detection and adjustment method

410~440: Steps

In order to make the above and other purposes, features, advantages and embodiments of this case more clearly understandable, the attached drawings are described as follows: Figure 1 is a block diagram of a power detection and adjustment system according to an embodiment of this case.

Figure 2 is a diagram showing a usage scenario of a power detection and adjustment system according to an embodiment of the present invention.

Figure 3 is a diagram showing a usage scenario of a power detection and adjustment system according to an embodiment of the present invention.

Figure 4 is a flowchart showing the steps of a power detection and adjustment method according to an embodiment of the present invention.

According to the usual practice, the various features and components in the figure are not drawn to scale. The drawing method is to present the specific features and components related to the case in the best way. In addition, the same or similar component symbols are used to refer to similar components/parts between different figures.

In order to make the description of the disclosed content more detailed and complete, the following provides an illustrative description of the implementation and specific embodiments of the present invention; however, this is not the only form of implementing or using the specific embodiments of the present invention. The implementation method covers the features of multiple specific embodiments and the method steps and their sequence for constructing and operating these specific embodiments. However, other specific embodiments can also be used to achieve the same or equal functions and step sequences.

Unless otherwise defined in this specification, the scientific and technical terms used herein have the same meanings as those understood and used by persons of ordinary knowledge in the technical field to which this case belongs. In addition, where there is no conflict with the context, singular terms used in this specification include the plural form of the term; and plural terms used also include the singular form of the term.

In addition, the term "coupled" or "connected" used in this article may refer to two or more elements making direct physical or electrical contact with each other, or making indirect physical or electrical contact with each other, or may refer to two or more elements operating or moving with each other.

In this article, the term "circuit" refers to an object consisting of one or more transistors and/or one or more active and passive components connected in a certain way to process signals.

Certain terms are used in the specification and patent application to refer to specific components. However, those with ordinary knowledge in the relevant technical field should understand that the same component may be referred to by different terms. The specification and patent application do not use the difference in name as a way to distinguish components, but use the difference in function of the components as the basis for distinction. The term "including" mentioned in the specification and patent application is an open term and should be interpreted as "including but not limited to".

FIG. 1 is a block diagram of a power detection and adjustment system according to an embodiment of the present invention. As shown in the figure, the power detection and adjustment system 100 includes a display 110 and a host 120, and the host 120 includes a power detector 121 and a processor 122. In terms of connection, the display 110 is coupled to the host 120, and the power detector 121 is coupled to the processor 122.

In order to achieve the effect that the display 110 can display the screen normally through the input voltage value Vi provided by the electronic device 900, this case provides a power detection and adjustment system 100 as shown in Figure 1, and its related operations are described in detail as follows.

Referring to FIG. 1 , in one embodiment, the display 110 is used to provide display brightness according to the input voltage value Vi of the electronic device 900. For example, the display 110 may be a liquid crystal display (LCD), and the liquid crystal display may be composed of a liquid crystal cell and a backlight module, but the present invention is not limited thereto. In some embodiments, the display 110 may be composed of an organic light-emitting diode (OLED) or a micro light-emitting diode (Micro LED), but the present invention is not limited thereto. In some embodiments, the host 120 is mainly used to provide power to the display 110 and adjust the display brightness of the display 110, and the host 120 and the display 110 can be combined into a screen device (for example: a portable screen device), but the present invention is not limited to this.

In one embodiment, the power detector 121 is used to detect the input voltage value Vi of the electronic device 900. For example, the power detector (voltage detector) 121 can be a reset integrated circuit (RESET IC) or any component that can detect voltage, but the present invention is not limited thereto.

In one embodiment, the processor 122 is used to determine whether to enter the protection mode (BL Safe mode) according to the input voltage value Vi of the electronic device 900. For example, the processor 122 can determine whether to enter the protection mode according to the voltage threshold and the input voltage value Vi, and the above-mentioned voltage threshold can be 4.5 volts (V), and the protection mode can be a backlight brightness setting or a display brightness setting that can definitely work safely (or normally), but the present case is not limited to this. In some embodiments, the above-mentioned voltage threshold can be set in a range of 4.2V to 5V, but the present case is not limited to this.

In one embodiment, in the protection mode, the processor 122 adjusts the display brightness of the display 110 to the protection brightness according to the input voltage value Vi. For example, the protection brightness can be the brightness that the display 110 can display normally according to the input voltage value Vi. If the maximum brightness grayscale of the display 110 is 255, the brightness grayscale of the protection brightness of the display 110 can be 10, but the present invention is not limited to this.

In some embodiments, the processor 122 can use the first algorithm of the power detection algorithm to determine whether to enter the protection mode according to the input voltage value Vi of the electronic device 900, and the first algorithm can have the function of determining whether to enter the protection mode and adjusting the display brightness of the display 110 to the protection brightness, but the present case is not limited to this.

In one embodiment, the processor 122 determines whether to enter the automatic adjustment mode according to the power detection algorithm and the input voltage value Vi. For example, the processor 122 can confirm whether the display brightness of the display 110 and the input voltage value Vi are in the best matching state according to the power detection algorithm. For example, for the display 110, when the input voltage value Vi is 4.5V, the display 110 can display a brightness gray level of 45, but at this time the brightness gray level displayed by the display 110 is only 10, so the power detection algorithm can determine to enter the automatic adjustment mode to achieve the effect of displaying the brightness gray level that best matches the input voltage value Vi, but the present case is not limited to this.

In one embodiment, in the automatic adjustment mode, the processor 122 adjusts the display brightness of the display 110 to the adjustment brightness in segments according to the power detection algorithm and the input voltage value Vi. For example, when the input voltage value Vi is 4.5V, if the brightness gray level of the display brightness of the display 110 is 10, the power detection algorithm can help determine whether it is the best brightness at this time, and further adjust the display brightness of the display 110 to the adjustment brightness (for example: the brightness gray level is 45) in segments, but the present case is not limited to this. In some embodiments, the above-mentioned "segmented adjustment" can be achieved through a coarse adjustment and a fine adjustment mechanism, or can be achieved based on a table lookup (for example, the table contains information that when the input voltage value Vi is 4.5V, the corresponding optimal brightness gray level is 45), but this case is not limited to this.

In some embodiments, the processor 122 can determine whether to enter the automatic adjustment mode according to the second algorithm of the power detection algorithm and the input voltage value Vi, and the second algorithm can have the function of determining whether to enter the automatic adjustment mode and adjusting the display brightness of the display 110 to the adjustment brightness in segments, but the present invention is not limited thereto. In some embodiments, in the automatic adjustment mode, the processor 122 can adjust the protection brightness of the display 110 to the adjustment brightness in segments according to the power detection algorithm and the input voltage value Vi, but the present invention is not limited thereto.

In one embodiment, the power detection algorithm includes a sorting algorithm. For example, the sorting algorithm can be any algorithm that adjusts the value through coarse and fine adjustment techniques, but the present invention is not limited to this.

FIG. 2 is a diagram showing a use scenario of a power detection and adjustment system according to an embodiment of the present invention. Please refer to FIG. 1 and FIG. 2. In one embodiment, the processor 122 increases the initial brightness value L1 corresponding to the protection brightness by a rough adjustment brightness value segment to the first intermediate brightness value L5 through a sorting algorithm. For example, the adjustable brightness range of the display 110 can be 0~255 gray levels, the brightness value L0 of FIG. 2 can be 0 gray level, the initial brightness value L1 can be 128 gray levels, and the rough adjustment brightness value can be 8 gray levels, but the present invention is not limited thereto. In addition, the display 110 can receive a signal (e.g., a pulse width modulation (PWM) signal) from the host 120 to display different brightness, and the above signal is related to the input voltage value Vi, but the present invention is not limited thereto.

In operation, the processor 122 can increase the initial brightness value L1 (e.g., 128 gray levels) to the brightness value L2 (e.g., 136 gray levels) through a sorting algorithm, and the processor 122 can increase the brightness value L2 (e.g., 136 gray levels) to the brightness value L3 (e.g., 144 gray levels) through a sorting algorithm, and the processor 122 can increase the brightness value L3 (e.g., 144 gray levels) to the brightness value L4 (e.g., 152 gray levels) through a sorting algorithm, and the processor 122 can increase the brightness value L4 (e.g., 152 gray levels) to the first intermediate brightness value L5 (e.g., 160 gray levels) through a sorting algorithm, but the present invention is not limited thereto.

In some embodiments, when the processor 122 increases the initial brightness value L1 corresponding to the protection brightness to the first relay brightness value L5 by the rough adjustment brightness value segment by segment through the sorting algorithm, the input voltage value Vi will have a voltage drop, for example, from 5V to 4.45V. However, at this time, the voltage threshold value (threshold voltage) of the display 110 can be 4.5V. If the input voltage value Vi of the display 110 is less than the voltage threshold value, it may cause poor operation. Therefore, the processor 122 can further adjust the first relay brightness value L5 to another corresponding brightness value that reaches above the voltage threshold value (for example, the second relay brightness value L43), but the present case is not limited to this.

In one embodiment, the processor 122 reduces the first relay brightness value L5 to the second relay brightness value L43 by fine-tuning brightness value segments through a sorting algorithm. The processor 122 reduces the second relay brightness value L43 by fine-tuning brightness value segments through a sorting algorithm to a final brightness value (e.g., brightness value L41 or L42), and the final brightness value (e.g., brightness value L41 or L42) differs from the second relay brightness value L43 by 1 to 2 fine-tuning brightness values. For example, the fine-tuning brightness value can be 1 gray level, but the present case is not limited thereto.

In operation, the processor 122 can reduce the first relay brightness value L5 (e.g., gray level 160) to the brightness value L45 (e.g., gray level 159) through a sorting algorithm, and the processor 122 can further reduce the brightness value L45 (e.g., gray level 159) to the brightness value L44 (e.g., gray level 158) through a sorting algorithm, and the processor 122 can further reduce the brightness value L44 (e.g., gray level 158) to the second relay brightness value L43 (e.g., gray level 157) through a sorting algorithm.

Then, the processor 122 reduces the second intermediate brightness value L43 (e.g., gray level 157) to the brightness value L42 (e.g., gray level 156) through a sorting algorithm. Next, the processor 122 reduces the brightness value L42 (e.g., gray level 156) to the brightness value L41 (e.g., gray level 155) through a sorting algorithm. It is worth mentioning that the final brightness value can be the brightness value L42 or L41, and the final brightness value (e.g., brightness value L42 or L41) differs from the second intermediate brightness value L43 by 1 to 2 fine-tuning brightness values. In addition, for the display 110, the display brightness corresponding to the brightness value L42 (e.g., grayscale 156) can be regarded as the adjustment brightness, and the display brightness corresponding to the brightness value L41 (e.g., grayscale 155) can also be regarded as the adjustment brightness, but the present invention is not limited thereto.

In some embodiments, when the processor 122 reduces the segment to the second relay brightness value L43 through the sorting algorithm, the input voltage value Vi corresponding to the second relay brightness value L43 can be 4.7V, which is greater than the voltage threshold (for example, the voltage threshold can be 4.5V), so the display 110 can operate normally, but the case is not limited to this. In addition, the second relay brightness value L43 can be reduced to the final brightness value in segments. Since there is a fluctuation range between the voltage (for example, the input voltage value Vi) or the signal, and the fluctuation range between the voltage or the signal may affect the operation of the display 110, the final brightness value can ensure that the display 110 can operate normally, but the case is not limited to this.

In some embodiments, the power detection and adjustment system 100 may have a memory, and the final brightness value (for example, brightness value L42 or L41) may be stored in the memory, but the present invention is not limited thereto.

In one embodiment, the display 110 includes a backlight device 111, and the display brightness of the display 110 is related to the backlight brightness of the backlight device 111. For example, the processor 122 can adjust the backlight brightness of the backlight device 111 through an algorithm, and the display brightness of the display 110 changes along with the change in the backlight brightness of the backlight device 111, and the backlight brightness of the backlight device 111 is proportional to the display brightness of the display 110, but the present invention is not limited thereto.

In some embodiments, in the protection mode, the display 110 adjusts the backlight brightness of the backlight device 111 to the protection brightness according to the input voltage value Vi. In some embodiments, in the automatic adjustment mode, the processor 122 adjusts the backlight brightness of the backlight device 111 to the adjustment brightness in segments according to the power detection algorithm and the input voltage value Vi. For example, the processor 122 can also control the backlight brightness of the backlight device 111 through an algorithm, but the present invention is not limited thereto.

In some embodiments, the power detection and adaptation system 100 further includes a transmission interface 123, and the transmission interface 123 is coupled to the electronic device 900. The transmission interface 123 is related to a universal serial bus (USB) interface, and a detailed description is as follows.

Please refer to Table 1. For example, the transmission interface 123 can be a Universal Serial Bus interface. The Universal Serial Bus interface includes any USB compatible format, such as USB 2.0, USB 3.0, USB 3.1, USB BC 1.2, USB Type-C 1.2 or USB PD 3.0 format. The transmission interface 123 is used to receive the input voltage value Vi of the electronic device 900, but the present invention is not limited thereto.

In one embodiment, the display 110 includes a light-emitting element 112, and the light-emitting element 112 flashes or emits light according to the input voltage value Vi of the electronic device 900. For example, the light-emitting element 112 can be a light-emitting diode (LED). When the light-emitting element 112 of the display 110 flashes or emits light, it means that the input voltage value Vi provided by the electronic device 900 will not be sufficient for the display 110 to operate normally, reminding the user to add power or enter the automatic adjustment mode, but the present invention is not limited to this.

FIG. 3 is a diagram showing a use scenario of a power detection and adjustment system according to an embodiment of the present invention. Please refer to FIG. 1 and FIG. 3. In one embodiment, the processor 122 displays an on-screen display (OSD) 13 through the display 110. The processor 122 enters the automatic adjustment mode according to the automatic adjustment instruction 131 of the screen menu 13. For example, when the user feels that the display brightness of the display 110 is low or the processor 122 reminds the user to enter the automatic adjustment mode, the user can enter the automatic adjustment mode through the automatic adjustment instruction 131 of the screen menu 13, and the automatic adjustment instruction 131 can be "Automatic adjustment: on/off" or text or command code related to automatic adjustment brightness, but the present invention is not limited thereto.

In some embodiments, the power detection and adjustment system 100 of the present invention can be applied to any application where the main system consumes little power (for example, the host 120 of the present invention) and the peripheral power consumption is large (for example, the display 110 of the present invention) but can be adjusted (for example, a display applicable to USB specifications (USB Display)), but the present invention is not limited to this. In some embodiments, USB Display refers to a display (Display) providing power and audio and video signals through a "USB interface" (for example, the transmission interface 123 of the present invention), but is not limited to transmission with encoding in accordance with the USB specification, including USB Type-C with DP specification (DisplayPort Alternate Mode, DP Alt-mode) specification, which can transmit DP specification audio and video signals on the "USB interface", and also belongs to the so-called display applicable to USB specifications (USB Display).

In some embodiments, the electronic device 900 may be a handheld device (e.g., a smart phone or a smart tablet) or a computer (e.g., a desktop or laptop computer), but the present invention is not limited thereto.

FIG. 4 is a flowchart showing the steps of a power detection and adjustment method according to an embodiment of the present invention. To make the power detection and adjustment method 400 of FIG. 4 easier to understand, please refer to FIG. 1 to FIG. 4. The steps of the power detection and adjustment method 400 of FIG. 4 are described in detail as follows.

In step 410, the input voltage value of the electronic device is used to determine whether to enter the protection mode. In one embodiment, the processor 122 is used to determine whether to enter the protection mode (BL Safe mode) according to the input voltage value Vi of the electronic device 900. For example, the operation of the power detection and adjustment method 400 is similar to the operation of the power detection and adjustment system 100 in Figure 1. For the sake of brevity, the description of other operations in the power detection and adjustment method 400 will be omitted here.

In step 420, in the protection mode, the display brightness of the display is adjusted to the protection brightness according to the input voltage value. In one embodiment, in the protection mode, the processor 122 adjusts the display brightness of the display 110 to the protection brightness according to the input voltage value Vi. For example, the operation of the power detection and adjustment method 400 is similar to the operation of the power detection and adjustment system 100 in FIG. 1. For the sake of brevity, the description of other operations in the power detection and adjustment method 400 will be omitted here.

In step 430, the power detection algorithm and the input voltage value are used to determine whether to enter the automatic adjustment mode. In one embodiment, the processor 122 determines whether to enter the automatic adjustment mode based on the power detection algorithm and the input voltage value Vi. For example, the operation of the power detection and adjustment method 400 is similar to the operation of the power detection and adjustment system 100 in Figure 1. For the sake of brevity, the description of other operations in the power detection and adjustment method 400 will be omitted here.

In step 440, in the automatic adjustment mode, the display brightness of the display is adjusted to the adjustment brightness in segments according to the power detection algorithm and the input voltage value. In one embodiment, in the automatic adjustment mode, the processor 122 adjusts the display brightness of the display 110 to the adjustment brightness in segments according to the power detection algorithm and the input voltage value Vi. For example, the operation of the power detection and adjustment method 400 is similar to the operation of the power detection and adjustment system 100 in FIG. 1. For the sake of brevity, the description of other operations in the power detection and adjustment method 400 will be omitted here.

Please refer to FIG. 1, FIG. 2 and FIG. 4. In one embodiment, the step of adjusting the display brightness of the display 110 to the adjusted brightness in segments according to the power detection algorithm and the input voltage value Vi includes: increasing the initial brightness value L1 corresponding to the protection brightness in segments to the first relay brightness value L5 by the coarse adjustment brightness value through the sorting algorithm of the power detection algorithm, and the first relay brightness value L5 is greater than the input voltage value Vi of the electronic device 900. For example, the operation of the power detection and adjustment method 400 is similar to the operation of the power detection and adjustment system 100 of FIG. 1. For the sake of brevity, the description of other operations in the power detection and adjustment method 400 will be omitted here.

In one embodiment, the step of adjusting the display brightness of the display 110 to the adjusted brightness in segments according to the power detection algorithm and the input voltage value Vi includes: reducing the first intermediate brightness value L5 to the second intermediate brightness value L43 in segments with the fine adjustment brightness value through the sorting algorithm, and the second intermediate brightness value L43 is less than the input voltage value Vi. For example, the operation of the power detection and adjustment method 400 is similar to the operation of the power detection and adjustment system 100 in FIG. 1. For the sake of brevity, the description of other operations in the power detection and adjustment method 400 will be omitted here.

In one embodiment, the step of adjusting the display brightness of the display 110 to the adjusted brightness in segments according to the power detection algorithm and the input voltage value Vi includes: reducing the second intermediate brightness value L43 by the fine adjustment brightness value in segments to the final brightness value (e.g., brightness value L41 or L42) through the sorting algorithm, and the final brightness value (e.g., brightness value L41 or L42) differs from the second intermediate brightness value L43 by 1 to 2 fine adjustment brightness values. For example, the operation of the power detection and adjustment method 400 is similar to the operation of the power detection and adjustment system 100 in FIG. 1. For the sake of brevity, the description of other operations in the power detection and adjustment method 400 will be omitted here.

In one embodiment, the display 110 includes a backlight device 111, and the display brightness of the display 110 is related to the backlight brightness of the backlight device 111. For example, the operation of the power detection and adjustment method 400 is similar to the operation of the power detection and adjustment system 100 in FIG. 1. For the sake of brevity, the description of other operations in the power detection and adjustment method 400 will be omitted here.

In one embodiment, the power detection and adjustment method 400 further includes the following steps: displaying an on-screen menu (OSD) 13 by the display 110; and entering the automatic adjustment mode according to the automatic adjustment instruction 131 of the on-screen menu 13. For example, the operation of the power detection and adjustment method 400 is similar to the operation of the power detection and adjustment system 100 in FIG. 1. For the sake of brevity, the description of other operations in the power detection and adjustment method 400 will be omitted here.

From the above implementation of this case, it can be seen that the application of this case has the following advantages. The power detection and adjustment system and power detection and adjustment method shown in the implementation example of this case can achieve the effect that the display can display the picture normally through the input voltage provided by the electronic device.

Although the above implementation method discloses the specific implementation examples of this case, it is not used to limit this case. People with common knowledge in the technical field to which this case belongs can make various changes and modifications to it without violating the principles and spirit of this case. Therefore, the scope of protection of this case shall be based on the scope defined by the accompanying patent application.

100: Power detection and adjustment system 110: Display 111: Backlight device 112: Light-emitting element 120: Host 121: Power detector 122: Processor 123: Transmission interface 900: Electronic device Vi: Input voltage value

Claims (7)

A power detection and adjustment system includes: a display, which is used to provide a display brightness according to an input voltage value of an electronic device; a power detector, which is used to detect the input voltage value of the electronic device; and a processor, which is used to determine whether to enter a protection mode according to the input voltage value of the electronic device, wherein in the protection mode, the processor adjusts the display brightness of the display to a protection brightness according to the input voltage value, wherein The processor determines whether to enter an automatic adjustment mode according to a power detection algorithm and the input voltage value, wherein in the automatic adjustment mode, the processor adjusts the display brightness of the display to an adjustment brightness in segments according to the power detection algorithm and the input voltage value; wherein the processor displays an on-screen menu (OSD) through the display; wherein the processor enters the automatic adjustment mode according to an automatic adjustment instruction of the on-screen menu. A power detection and adjustment system as described in claim 1, wherein the power detection algorithm includes a sorting algorithm, wherein the processor increases an initial brightness value corresponding to the protection brightness by a coarse adjustment brightness value segment to a first intermediate brightness value through the sorting algorithm, wherein the processor decreases the first intermediate brightness value by a fine adjustment brightness value segment to a second intermediate brightness value through the sorting algorithm, wherein the processor decreases the second intermediate brightness value by a fine adjustment brightness value segment to a final brightness value through the sorting algorithm, and the final brightness value differs from the second intermediate brightness value by 1 to 2 of the fine adjustment brightness values. A power detection and adjustment system as described in claim 1, wherein the display includes a backlight device, wherein the display brightness of the display is related to a backlight brightness of the backlight device. The power detection and adjustment system as described in claim 1 further includes: a transmission interface coupled to the electronic device, wherein the transmission interface is associated with a universal serial bus (USB) interface. A power detection and adjustment system as described in claim 1, wherein the display includes a light-emitting element, and the light-emitting element flashes or emits light according to the input voltage value of the electronic device. A power detection and adjustment method includes: judging whether to enter a protection mode according to an input voltage value of an electronic device; in the protection mode, adjusting a display brightness of a display to a protection brightness according to the input voltage value; judging whether to enter an automatic adjustment mode according to a power detection algorithm and the input voltage value; displaying an on-screen menu (OSD) by the display; entering the automatic adjustment mode according to an automatic adjustment instruction of the on-screen menu; in the automatic adjustment mode, adjusting the display brightness of a display to a protection brightness according to the input voltage value; judging whether to enter an automatic adjustment mode according to a power detection algorithm and the input voltage value; The display brightness of the display is adjusted to an adjusted brightness by segmented adjustment; an initial brightness value corresponding to the protection brightness is increased to a first intermediate brightness value by a coarse adjustment brightness value by a sorting algorithm of the power detection algorithm; the first intermediate brightness value is reduced to a second intermediate brightness value by a fine adjustment brightness value by the sorting algorithm; and the second intermediate brightness value is reduced to a final brightness value by a fine adjustment brightness value by the sorting algorithm, and the final brightness value differs from the second intermediate brightness value by 1 to 2 of the fine adjustment brightness values. A power detection and adjustment method as described in claim 6, wherein the display includes a backlight device, wherein the display brightness of the display is related to a backlight brightness of the backlight device.