TW201727321A - Electronic apparatus and method for automatic adjusting brightness for a screen - Google Patents

Abstract

An electronic apparatus and a method for automatic adjusting brightness for a screen are provided. The method includes the following steps. First, At least one environment brightness message transmitted by at least one first device is received by a communication module of the electronic apparatus. Next, whether the brightness of a screen on the electronic apparatus is adjusted automatically is determined by a controller of the electronic apparatus according to the received environment brightness message.

Description

Electronic device and screen brightness automatic adjustment method

The present invention relates to an electronic device and screen brightness adjustment method, and more particularly to an electronic device and method for automatically adjusting screen brightness according to ambient brightness.

Mobile devices (such as mobile phones, tablets or laptops, etc.) are designed to be carried and carried by the user, so the environment may be used in darker indoors or in brighter outdoors. Outdoors, the screen displayed by the mobile device may not be clear because the surrounding environment is too bright. In a dark room, if the screen displayed by the mobile device is too bright, the user's eyes will feel glare and fatigue.

Therefore, the brightness of a screen suitable for reading mobile devices should be adjusted correspondingly to the different brightness of the surrounding environment. A common method is to provide an ambient light source sensor on the mobile device so that the mobile device can adjust the brightness of the screen according to the ambient brightness sensed by the ambient light source sensor. However, this will increase the cost of the mobile device. If the mobile device does not have an ambient light source sensor, the mobile device cannot automatically adjust the brightness of the screen according to the brightness change of the surrounding environment. At this time, the screen can be manually adjusted only by the user according to the brightness change of the surrounding environment. brightness. Although it is not difficult for the user to manually adjust the brightness of the screen, the user still has to enter the setting page of the mobile device to set the brightness, which may be inconvenient for the user.

The invention provides an electronic device and a method for automatically adjusting the brightness of the screen, which can enable the electronic device to automatically adjust the brightness of the screen of the electronic device under different ambient brightness according to the ambient brightness information provided by other devices, in addition to increasing the image visibility of the screen. It also makes the electronic device more convenient to use.

The electronic device of the present invention includes a screen, a communication module, and a controller. The communication module is configured to receive at least one ambient brightness information transmitted by the at least one first device. The controller is coupled to the screen and the communication module for determining whether to automatically adjust the brightness of the screen according to the received ambient brightness information.

The method for automatically adjusting the brightness of the screen of the present invention is applicable to an electronic device, the method comprising the steps of: receiving, by the communication module of the electronic device, at least one ambient brightness information transmitted by the at least one first device; and a controller that transmits the electronic device Whether or not to automatically adjust the brightness of the screen of the electronic device is determined based on the received environmental brightness information.

Based on the above, in the electronic device and the screen brightness automatic adjustment method proposed by the present invention, the ambient brightness information provided by the other device (ie, the first device) can be received through the communication module of the electronic device. The controller of the electronic device can determine whether to automatically adjust the brightness of the screen of the electronic device under different ambient brightness according to the ambient brightness information, in addition to increasing the image visibility of the screen, and making the electronic device more convenient to use.

The above described features and advantages of the invention will be apparent from the following description.

DETAILED DESCRIPTION OF THE INVENTION Reference will now be made in detail to the exemplary embodiments embodiments In addition, wherever possible, the same reference numerals in the drawings

1 and FIG. 2, FIG. 1 is a block diagram of an electronic device according to an embodiment of the invention, and FIG. 2 is a schematic diagram of an application scenario of the electronic device of FIG. As shown in FIG. 1 , the electronic device 100 can include a screen 110 , a communication module 120 , a controller 130 , and a lookup table SL . The controller 130 can be coupled to the screen 110 and the communication module 120. As shown in FIG. 1 and FIG. 2, the electronic device 100 can communicate with at least one first device 910, 920 through the communication module 120. In an embodiment of the invention, the first device 910 may be, for example, an environmental device or a mobile device having an ambient brightness sensor ELS, and the first device 920 may be, for example, a server, but the invention is not limited thereto.

In detail, the ambient brightness sensor ELS of the first device 910 (environment device or mobile device) can be used to detect the brightness of the environment in which it is located (light from the light source 800, such as sunlight or light, etc.), and To provide a corresponding ambient brightness information INF_1, wherein the ambient brightness information INF_1 can be uploaded to the server (first device 920), transmitted to the electronic device 100 (via the communication module 120), or output to the environmental space in a broadcast manner. . The first device 920 (server) can perform radio broadcast or point-to-point transmission through the internal network module to receive the ambient brightness information INF_1~INF_N received by the first device 920 (server) (not limited thereto) It is transmitted to the electronic device 100. The electronic device 100 can determine whether to automatically adjust the brightness of the screen 110 according to the received environmental brightness information INF_1~INF_N (from the first device 910 or the first device 920), but is not limited thereto. In other embodiments of the present invention, the electronic device 100 may also determine whether to adjust the volume of the electronic device 100 according to other environmental information received, such as environmental noise information. In particular, the number of the first devices 910, 920 in the embodiment of the present invention is merely exemplary and is not intended to limit the present invention. In fact, in other application scenarios of the present invention, the number of first devices used to output or transmit ambient brightness information may depend on the actual application.

Briefly, the embodiment of FIG. 2 of the present invention can utilize the wireless connection between devices in the environment to cause the electronic device 100 to obtain the ambient brightness information INF_1~INF_N. For example, due to the gradual popularization of the Internet of Things, sensing devices (such as surveillance cameras, etc.) that are set up in response to security needs can be found everywhere in the current environment. These sensing devices can also provide environmental information through the Internet of Things (for example) The environmental brightness information is given to the electronic device 100 shown in FIG. 2.

Please refer to Figure 1 below. In an embodiment of the invention, the screen 110 can be, for example, a liquid crystal display (LCD) screen, a plasma display panel (PDP) screen, a field emission display (FED) screen, An electroluminescent display (ELD) screen, a light emitting diode (LED) screen, or the like, but the invention is not limited thereto.

In an embodiment of the invention, the communication module 120 can be a wireless communication module, including: a bluetooth module, a wireless fidelity (Wi-Fi) module, and a global system for mobile. Communication, GSM) module, code division multiple access (CDMA) module, wideband CDMA (WCDMA) module, CDMA-2000 module, time division multiplexing Time division multiple access (TDMA) module, worldwide interoperability for microwave access (WiMAX) module, long term evolution (LTE) module, wireless local area network (wireless local area network, The WLAN module is an ultra wideband (UWB) module or the like, but the present invention is not limited thereto. In other embodiments of the invention, the communication module 120 can also be integrated into the controller 130.

In an embodiment of the invention, the controller 130 may be a hardware, a firmware, or a software or machine stored in a memory and loaded by a micro processor or a digital signal processor (DSP). Executable code. If implemented by hardware, the controller 130 may be implemented by multiple circuit chips or by a single integrated circuit chip, but the invention is not limited thereto. The plurality of circuit chips or the single integrated circuit chip may be implemented by using a special function integrated circuit (ASIC) or a programmable logic gate array (FPGA). The above memory may be, for example, a random access memory, a read only memory, a flash memory, a hard disk, a magnetic optical disk, or the like.

FIG. 3 is a flow chart showing the steps of a method for automatically adjusting the brightness of a screen according to an embodiment of the invention. Referring to FIG. 1 to FIG. 3 simultaneously, the automatic screen brightness adjustment method shown in FIG. 3 can be applied to the electronic device 100 shown in FIGS. 1 and 2 . The method for automatically adjusting the brightness of the screen in the exemplary embodiment includes the following steps. First, when the method of automatically adjusting the brightness of the screen is started, the controller 130 can check whether the function of automatically adjusting the brightness of the screen of the electronic device 100 is turned on, as shown in step S300. If the result of the check is yes, step S310 is performed; otherwise, the operation of automatically adjusting the brightness of the screen of the electronic device 100 is not performed. Then, in step S310, at least one ambient brightness information INF_1~INF_N transmitted by at least one first device 910, 920 is received through the communication module 120. Thereafter, in step S320, the control unit 130 determines whether to automatically adjust the brightness of the screen 110 based on the lookup table SL and the received ambient brightness information INF_1~INF_N. In an embodiment of the present invention, step S300 may be omitted. If step S300 is omitted, when the automatic screen brightness adjustment method is started, step S300 is skipped and step S310 is directly executed.

The detailed steps in step S320 will be described below. Please refer to FIG. 1 to FIG. 4 at the same time. FIG. 4 is a flow chart of the steps of the step S320 of FIG. Since the electronic device 100 shown in FIG. 2 can receive the ambient brightness information INF_1~INF_N from the first device 910, 920, in step S411, the received ambient brightness information INF_1~INF_N can be transmitted through the controller 130. The ambient brightness information (INF_1) transmitted by a valid device (assumed to be the first device 910) is selected as the effective brightness information B_INF, wherein the effective brightness information B_INF may include the effective brightness parameter B_PAR and the name of the valid device B_NAM, but The invention is not limited thereto. In other embodiments of the invention, the effective brightness information B_INF may also include the location of the active device.

Further, in an embodiment of the step S411 of the present invention, the controller 130 can determine the signal strength of the received ambient brightness information INF_1~INF_N, the location of the electronic device 100, and the location of the first device 910, 920. Whether the location is the same or the priority order set in the lookup table SL, and the ambient luminance information (INF_1) transmitted by the valid device (assumed to be the first device 910) is selected as the effective luminance information B_INF, but the present invention Not limited to this. It can be understood that when the controller 130 determines that the received ambient brightness information INF_1 (transmitted by the first device 910) has the strongest signal strength, it may represent that the first device 910 is closest to the electronic device 100, and then the first device 910 The controller 130 is most likely to be in the same environment as the electronic device 100. Therefore, the controller 130 can select the ambient brightness information INF_1 transmitted by the first device 910 as the effective brightness information B_INF.

Then, in step S412, the controller 130 determines whether the name B_NAM of the valid device exists in the lookup table SL, and accordingly determines whether the brightness of the screen 110 is automatically adjusted according to the effective brightness parameter B_PAR, which will be performed later. More detailed instructions. The contents of the lookup table SL will be described first below. Please refer to Table 1. Table 1 is the content of the lookup table SL according to an embodiment of the present invention. As shown in Table 1, the lookup table SL may include the "name" of the reference device, the "maximum value of the effective brightness parameter" and the corresponding "screen maximum brightness setting value", "the minimum value of the effective brightness parameter", and the corresponding "screen" Minimum brightness setting value, "signal strength" of the reference device, and "position" of the reference device. Therefore, in step S412, the controller 130 determines whether the name B_NAM of the valid device matches the "name" of the reference device in the lookup table SL shown in Table 1. If the name B_NAM of the valid device matches the "name" of a reference device in Table 1, it indicates that the name B_NAM of the valid device already exists in the lookup table SL shown in Table 1. Table 1

As shown in Table 1, among the parameters corresponding to the reference device whose "name" is "home server", the "maximum value of the effective brightness parameter" is 500 and the corresponding "screen maximum brightness setting value" is 300. "The minimum value of the effective brightness parameter" is 100 and its corresponding "screen minimum brightness setting value" is 30; the "signal strength" received by the electronic device 100 from the reference device whose "name" is "home server" is -65, where "signal strength" may be Received Signal Strength Indication (RSSI), but is not limited thereto; and the "name" of the reference device is "Home Server" and the location is "Home" to The user can clearly know the exact location of the reference device. In Table 1, the parameters corresponding to the "name" of the remaining reference devices can be analogized according to the above description, and therefore will not be described again. In particular, in Table 1, the "Location" is marked as "Home-X" reference device ("Name" is "Living Room Broadcaster") and the reference device marked "Home" in "Location" (" "Name" is "Home Server"), and the reference device with "Location" marked as "0" ("Name" is "Mobile 1" or "Watch 1") represents the mobile device and its location will follow The user's movement changes.

Referring to FIG. 1 to FIG. 4 simultaneously, in step S412, it is determined by the controller 130 that the name B_NAM (for example, "monitor 1") of the valid device in the effective luminance information B_INF acquired by the electronic device 100 does not exist. When the lookup table SL (Table 1) is reached, the process proceeds to step S413, and the name B_NAM of the valid device (for example, "monitor 1") can be stored in the lookup table SL by the controller 130 as one of the lookup tables SL. Refer to the "name" of the device, but it is not limited to this. In an embodiment of the invention, the "signal strength" of the active device and the "position" of the active device can also be stored in the lookup table SL. At this time, it may be that the effective device enters the environment where the electronic device 100 is located, or it may be that the position of the electronic device 100 has changed, for example, the user carries the electronic device 100 from the indoor to the outdoor, regardless of the above situation. A predetermined time interval may be reserved for the user to decide whether to adjust the brightness of the screen 110. Therefore, in step S414, timing can be started by the controller 130. Then, in step S415, after the preset time interval, the controller 130 can store an estimated brightness setting value of the screen 110 and the effective brightness parameter B_PAR to the lookup table SL (for example, Table 1) and correspond to the above. The name of the reference device (for example, "Monitor 1"), wherein the above-mentioned evaluation brightness setting value corresponds to the effective brightness parameter B_PAR. The details of step S415 will be described below.

In step S415, the controller 130 can determine whether the user manually adjusts the brightness value of the screen 110 while timing, as shown in step S4151. If the result of the determination in step S4151 is YES, the controller 130 will re-clock as shown in step S4152. At this time, the controller 130 can use the brightness value of the screen 110 manually adjusted by the user as the evaluation brightness setting value. After step S4152, the process proceeds to step S4153, and the controller 130 determines whether the length of time for which the time is continuously counted is equal to the preset time interval. On the other hand, if the result of the determination in step S4151 is no (ie, the user does not manually adjust the brightness value of the screen 110), the controller 130 will continue to time and can use the current brightness setting value of the screen 110 as the evaluation brightness setting value. And the process proceeds to step S4153 to determine whether the length of time for which the continuous counting is made by the controller 130 is equal to the preset time interval. If the decision result in the step S4153 is NO, it indicates that the time reserved for the user to adjust the brightness of the screen 110 has not expired, so the process returns to the step S4151.

If the result of the determination in step S4153 is YES, it indicates that the time reserved for the user to adjust the brightness of the screen 110 has expired, so the controller 130 can store the above-mentioned evaluation brightness setting value and the effective brightness parameter B_PAR to the lookup table SL. And the evaluation brightness setting value is corresponding to the effective brightness parameter B_PAR as shown in step S4154. The effective brightness parameter B_PAR can be used as the "maximum value of the effective brightness parameter" shown in Table 1, and the above-mentioned evaluation brightness setting value is the corresponding "screen maximum brightness setting value"; or, the effective brightness parameter B_PAR can be used as a table. The "minimum value of the effective brightness parameter" shown in 1 and the above-mentioned evaluation brightness setting value is the corresponding "screen minimum brightness setting value".

It can be understood that if the user does not manually adjust the brightness value of the screen 110 in step S4151, then the current brightness setting value of the screen 110 (assumed to be the set value of 150) can be accepted by the user, so the controller 130 The current brightness setting value (set value of 150) of the screen 110 is used as the evaluation brightness setting value, and the effective brightness parameter B_PAR (assuming a parameter value of 250) is associated with the current brightness setting value of the screen 110 (set value of 150). . In contrast, if the user manually adjusts the brightness value of the screen 110 in step S4151 (assuming the setting value is adjusted to 100), it indicates that the user feels that the manually adjusted brightness value of the screen 110 (the set value of 100) is currently The environment is more suitable for reading or more comfortable, so the controller 130 uses the brightness value of the screen 110 manually adjusted by the user (the set value of 100) as the evaluation brightness setting value, and the effective brightness parameter B_PAR (250 The parameter value) corresponds to the brightness value of the screen 110 (100 set value) manually adjusted by the user.

Please refer to FIG. 1, FIG. 4 and FIG. 5 at the same time. FIG. 5 is a flow chart of the steps of the step S320 of FIG. In step S412 shown in FIG. 4, it is determined by the controller 130 that the name B_NAM of the valid device (for example, "home server") in the effective luminance information B_INF obtained by the electronic device 100 already exists in the lookup table SL ( For example, in the case of Table 1), the process proceeds to step S417 shown in FIG. 5, and the corresponding evaluation brightness setting value can be found or calculated by the controller 130 according to the effective brightness parameter B_PAR and the lookup table SL (Table 1).

For example, if the name B_NAM of the effective device in the effective brightness information B_INF obtained by the electronic device 100 is “home server” and the effective brightness parameter B_PAR is 500, the controller 130 can perform the lookup shown in Table 1. The corresponding evaluation brightness setting value found in the table is 300. Alternatively, if the name B_NAM of the effective device in the effective brightness information B_INF obtained by the electronic device 100 is “home server” and the effective brightness parameter B_PAR is 300, the controller 130 can perform the lookup shown in Table 1. The corresponding evaluation brightness setting value calculated by the internal difference method is 165.

Next, in step S418, the controller 130 determines whether the estimated brightness setting value is the same as the current brightness setting value of the screen 110. If the result of the determination is YES, it indicates that the brightness of the current environment of the electronic device 100 has not changed without automatically adjusting the brightness of the screen 110. Therefore, the brightness adjustment operation is ended, and the controller 130 performs the brightness adjustment operation of the next screen 110. . If the result of the determination in step S418 is negative, indicating that the brightness of the environment in which the electronic device 100 is currently located may have changed, the controller 130 may generate a driving signal (eg, driving voltage or driving) for adjusting the screen 110 based on the estimated brightness setting value. Current) to change the brightness of the screen 110 as shown in step S419.

Next, in step S420, the controller 130 determines whether the user manually adjusts the brightness value of the screen 110. If the result of the determination in step S420 is negative, it means that the brightness of the screen 110 adjusted by the controller in step S419 can be accepted by the user, so that the brightness adjustment operation is ended, and the controller 130 will perform the next round of the screen. The brightness adjustment of 110 operates.

If the result of the determination in step S420 is YES, it indicates that the user feels that the brightness value of the manually adjusted screen 110 is more suitable for reading or more comfortable in the current environment, so that the controller 130 can pass the above-mentioned effective brightness parameter B_PAR and The user updates the lookup table SL by the brightness value of the screen 110 manually adjusted in step S420, as shown in step S421.

For example, assume that the name B_NAM of the valid device in the effective brightness information B_INF obtained by the electronic device 100 is “home server”, the effective brightness parameter B_PAR is 300, and the controller 130 is within the lookup table shown in Table 1. The difference method calculates the corresponding evaluation brightness setting value of 165. If it is determined in step S420 that the user manually adjusts the brightness value of the screen 110 to 170, indicating that the effective brightness parameter B_PAR is 300 should correspond to the evaluation brightness setting value of 170, the controller 130 may be based on the effective brightness parameter B_PAR of 300 and its corresponding The evaluation brightness setting value is 170 to update the "screen maximum brightness setting value" or "screen minimum brightness setting value" in the "name" of the "home server" in Table 1.

For example, the effective brightness parameter B_PAR is 300 and its corresponding evaluation brightness setting value is 170 and the "effective brightness parameter maximum value" is 500 (as shown in Table 1) and its corresponding "screen maximum brightness setting value". For 300 (as shown in Table 1), the "minimum brightness setting value of the screen" with "the minimum value of the effective brightness parameter" of 100 is calculated by the heterodyne method, and the corresponding minimum brightness setting of the screen is set. The value is changed from 30 to 40, but the present invention is not limited thereto.

In summary, in the electronic device and the screen brightness automatic adjustment method proposed by the embodiments of the present invention, the ambient brightness information provided by other devices (ie, the first device) can be received through the communication module of the electronic device. The controller of the electronic device can determine whether to automatically adjust the brightness of the screen of the electronic device under different ambient brightness according to the obtained ambient brightness information, in addition to increasing the image visibility of the screen, and making the electronic device more convenient to use. Sex. In particular, the electronic device of the embodiment of the present invention may be a television, a computer screen, a mobile phone, a tablet computer, or the like that does not have an ambient brightness sensor. In this way, even in an electronic device that does not have an ambient brightness sensor, the electronic device can automatically adjust the brightness of the screen through the automatic brightness adjustment method of the present invention.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧Electronic devices
110‧‧‧ screen
120‧‧‧Communication module
130‧‧‧ Controller
800‧‧‧Light source
910, 920‧‧‧ first device
ELS‧‧‧Environmental Brightness Sensor
INF_1~INF_N‧‧‧Environmental brightness information
SL‧‧‧ lookup table
S300, S310, S320, S411~S415, S417~S421, S4151~S4154‧‧‧ steps for automatic adjustment of screen brightness

FIG. 1 is a block diagram of an electronic device according to an embodiment of the invention. 2 is a schematic diagram of an application scenario of the electronic device of FIG. 1. FIG. 3 is a flow chart showing the steps of a method for automatically adjusting the brightness of a screen according to an embodiment of the invention. 4 and 5 are flowcharts showing the steps of a part of the step S320 of FIG.

Steps for automatic adjustment of S300, S310, S320‧‧‧ screen brightness

Claims (15)

An electronic device includes: a screen; a communication module configured to receive at least one ambient brightness information transmitted by the at least one first device; and a controller coupled to the screen and the communication module for The received at least one ambient brightness information determines whether the brightness of the screen is automatically adjusted. The electronic device of claim 1, wherein: the controller selects, according to the received at least one ambient brightness information, the ambient brightness information transmitted by a valid device as an effective brightness information, Wherein the effective brightness information includes a valid brightness parameter and a name of the valid device; and the controller determines whether the name of the valid device exists in a lookup table, and accordingly determines whether the screen is based on the effective brightness parameter The brightness is automatically adjusted. The electronic device of claim 2, wherein: the controller is based on the received signal strength of the at least one ambient brightness information, the location of the electronic device, or the priority order set in the lookup table. The ambient brightness information transmitted by the active device is selected as the effective brightness information. The electronic device of claim 2, wherein: when the controller determines that the name of the valid device does not exist in the lookup table, the controller stores the name of the valid device to the lookup table to As a name of a reference device in the lookup table, and after the controller is in a preset time interval, storing an estimated brightness setting value and the effective brightness parameter of the screen to the lookup table and corresponding to the reference device The name, wherein the estimated brightness setting corresponds to the effective brightness parameter. The electronic device of claim 4, wherein: after the controller stores the name of the valid device to the lookup table, the controller starts timing and continuously determines whether the user manually adjusts the screen. a brightness value, if the determination result is yes, the controller re-times and uses the brightness value of the screen manually adjusted by the user as the evaluation brightness setting value; otherwise, the controller continues to time and the screen is The current brightness setting value is used as the evaluation brightness setting value; and when the length of time that the controller continues to time is equal to the preset time interval, the controller stores the evaluation brightness setting value and the effective brightness parameter to the lookup table, and The estimated brightness setting value is corresponding to the effective brightness parameter. The electronic device of claim 2, wherein: when the controller determines that the name of the valid device exists in the lookup table, the controller finds or matches the lookup table according to the effective brightness parameter. Calculating a corresponding evaluation brightness setting value; and the controller determines whether the evaluation brightness setting value is the same as the current brightness setting value of the screen, and if the determination result is yes, the controller performs the brightness adjustment of the next round of the screen Operation, if the result of the determination is no, the controller generates a driving signal for adjusting the screen based on the evaluated brightness setting value to change the brightness of the screen. The electronic device of claim 6, wherein: after the controller changes the brightness of the screen, the controller determines whether the user manually adjusts a brightness value of the screen; if the determination result is no, the The controller performs a brightness adjustment operation of the screen in the next round; and if the determination result is YES, the controller updates the lookup table according to the effective brightness parameter and the brightness value of the screen manually adjusted by the user. The electronic device of claim 2, wherein the lookup table is configured to store the name of the valid device as a name of a reference device, a maximum value of the effective brightness parameter, and a corresponding maximum brightness setting of the screen. The value, the minimum value of the effective brightness parameter and the corresponding minimum brightness setting of the screen, the signal strength of the active device, and the location of the active device. An automatic brightness adjustment method for an electronic device, the method comprising: receiving, by a communication module of the electronic device, at least one ambient brightness information transmitted by the at least one first device; and controlling through the electronic device The device determines whether to automatically adjust the brightness of the screen of the electronic device according to the received at least one ambient brightness information. The method for automatically adjusting the brightness of the screen according to claim 9, wherein the step of determining, by the controller, whether to automatically adjust the brightness of the screen according to the at least one ambient brightness information comprises: In the at least one ambient brightness information, the ambient brightness information transmitted by a valid device is selected as an effective brightness information, wherein the effective brightness information includes an effective brightness parameter and a name of the valid device; and is determined by the controller Whether the name of the valid device exists in a lookup table, and accordingly determines whether the brightness of the screen is automatically adjusted according to the effective brightness parameter. The method for automatically adjusting the brightness of the screen according to claim 10, wherein the controller selects, by the controller, the ambient brightness information transmitted by the effective device as the effective brightness information in the at least one ambient brightness information. The step of: selecting, by the controller, the ambient brightness information transmitted by the valid device according to the signal strength of the at least one ambient brightness information, the location of the electronic device, or the priority order set in the lookup table. As the effective brightness information. The method for automatically adjusting the brightness of the screen according to claim 10, wherein the determining, by the controller, whether the name of the valid device exists in the lookup table, and determining whether to determine according to the effective brightness parameter The step of automatically adjusting the brightness of the screen includes: when the controller determines that the name of the valid device does not exist in the lookup table, storing the name of the valid device to the lookup table through the controller as the Searching for a name of a reference device in the table, and after the predetermined time interval, storing, by the controller, an estimated brightness setting value of the screen and the effective brightness parameter to the lookup table and corresponding to the reference device a name, wherein the evaluated brightness setting corresponds to the effective brightness parameter. The method for automatically adjusting the brightness of the screen according to claim 12, wherein after the preset time interval, the evaluation brightness setting value of the screen and the effective brightness parameter are stored by the controller to the lookup table. And the step of corresponding to the name of the reference device includes: starting timing through the controller and continuously determining whether the user manually adjusts a brightness value of the screen, and if the determination result is yes, re-clocking through the controller and The brightness value of the screen manually adjusted by the user is used as the evaluation brightness setting value; otherwise, the controller continuously counts and the current brightness setting value of the screen is used as the evaluation brightness setting value; and when the controller continues When the time length of the timing is equal to the preset time interval, the evaluation brightness setting value and the effective brightness parameter are stored by the controller to the lookup table, and the evaluation brightness setting value is corresponding to the effective brightness parameter. The method for automatically adjusting the brightness of the screen according to claim 10, wherein the determining, by the controller, whether the name of the valid device exists in the lookup table, and determining whether to determine according to the effective brightness parameter The step of automatically adjusting the brightness of the screen includes: when it is determined by the controller that the name of the valid device exists in the lookup table, the controller finds or calculates the search according to the effective brightness parameter and the lookup table. Corresponding to an evaluation brightness setting value; and determining, by the controller, whether the evaluation brightness setting value is the same as the current brightness setting value of the screen, and if the determination result is yes, performing brightness adjustment of the next round of the screen through the controller If the result of the determination is no, the controller generates a driving signal for adjusting the screen based on the evaluated brightness setting value to change the brightness of the screen. The method for automatically adjusting the brightness of the screen according to claim 14, wherein the determining, by the controller, whether the name of the valid device exists in the lookup table, and determining whether to determine according to the effective brightness parameter The step of automatically adjusting the brightness of the screen further includes: after changing the brightness of the screen through the controller, determining, by the controller, whether the user manually adjusts a brightness value of the screen; if the determination result is no, the The controller performs a brightness adjustment operation of the screen in the next round; and if the determination result is YES, the controller updates the lookup table according to the effective brightness parameter and the brightness value of the screen manually adjusted by the user.