monitor

Abstract

A display is provided for electrical connection with a terminal electronic device. When a main control unit determines that an external power supply function on / off setting indication is enabled, the main control unit selects an acceptable voltage and current specification or one of the acceptable voltage and current specifications from a plurality of available supply voltage and current specifications as a preset available supply voltage and current specification, and controls a power control unit to supply power to the terminal electronic device according to the preset available supply voltage and current specification. When the main control unit determines that the external power supply function on / off setting indication is disabled, the main control unit controls the power control unit to not supply power to the terminal electronic device.

Description

Technical Field

[0001] This invention relates to a display, and more particularly to a display capable of supplying power to electronic devices. Prior Technology

[0002] In modern society, people carry various electronic devices when they go out for communication, taking photos, or completing work. However, after a period of use, these electronic devices often run out of power and need to be charged. While it's possible to carry a charger to charge electronic devices, carrying multiple devices might require carrying separate chargers for each device. Therefore, developing a new system that makes charging electronic devices more convenient is the subject of this invention. Summary of the Invention

[0003] Therefore, one object of the present invention is to provide a display capable of supplying power to electronic devices.

[0004] This invention relates to a display suitable for electrical connection to a terminal electronic device, and includes a main control unit, a power supply unit, a power control unit, a storage unit, a display unit, and an input unit. The power supply unit stores multiple sets of available voltage and current specifications. Each set of available voltage and current specifications includes a available voltage value and a available current value. The power control unit is electrically connected to the main control unit and the power supply unit, and is controlled by the main control unit to provide power supplied by the power supply unit to the terminal electronic device. The storage unit is electrically connected to the main control unit and stores external power supply function on / off setting data indicating whether it is enabled or disabled. The display unit is electrically connected to the main control unit and can display a screen menu. The input unit is electrically connected to the main control unit and allows the user to operate the screen menu to enable or disable the external power supply function on / off setting data.

[0005] When the power control unit is electrically connected to the terminal electronic device, the power control unit receives one or more acceptable voltage and current specification data from the terminal electronic device and transmits the acceptable voltage and current specification data, or such acceptable voltage and current specification data, to the main control unit. Each acceptable voltage and current specification data includes an acceptable voltage value and an acceptable current value. The main control unit determines whether the external power supply function on / off setting indicates that it is on or off. When the main control unit determines that the external power supply function on / off setting indicates that it is on, the main control unit selects one of the acceptable voltage and current specifications from the available supply voltage and current specification data as a preset available supply voltage and current specification data, and controls the power control unit to supply power to the terminal electronic device according to the preset available supply voltage and current specification data. When the main control unit determines that the external power supply function on / off setting indicates that it is off, the main control unit controls the power control unit not to supply power to the terminal electronic device.

[0006] In some embodiments of the display of the present invention, when the main control unit selects one of the available voltage and current specifications as the preset available voltage and current specifications, the main control unit uses the available voltage value that matches the minimum acceptable voltage value as a preset supply voltage value. The main control unit selects the available voltage value that matches the preset supply voltage value from the available voltage and current specifications, then selects the smallest available current value from the selected available voltage and current specifications, and determines whether the available current value of the selected available voltage and current specifications is less than or equal to the acceptable current value of the available voltage and current specifications including the minimum acceptable voltage value. When the main control unit determines that the available current value of the selected available voltage and current specifications is less than or equal to the acceptable current value of the available voltage and current specifications including the minimum acceptable voltage value, the main control unit uses the selected available voltage and current specifications as the preset available voltage and current specifications.

[0007] In some embodiments of the display of the present invention, when the main control unit determines that the supply current value of the selected supply voltage and current specification data is not less than or equal to the acceptable current value of the acceptable voltage and current specification data including the minimum acceptable voltage value, the main control unit adjusts the supply current value of the selected supply voltage and current specification data to be less than or equal to the acceptable current value of the acceptable voltage and current specification data including the minimum acceptable voltage value, and uses the adjusted supply current value as a preset supply current value. The main control unit controls the power control unit to supply power to the terminal electronic device according to the preset supply voltage value and the preset supply current value.

[0008] In some embodiments of the display of the present invention, the main control unit uses the available voltage value that corresponds to the acceptable voltage value, or the supplyable voltage value that corresponds to each of the acceptable voltage values, as one or more selectable voltage values. The main control unit selects the supplyable voltage value that corresponds to the selectable voltage value or the selectable voltage values ​​from the supplyable voltage and current specification data, and uses the selected supplyable voltage and current specification data as a plurality of selectable voltage and current options corresponding to the supplyable voltage and current specification data. When a user operates the screen menu through the input unit to select one of the selectable voltage and current options, the main control unit uses the supplyable voltage value of the supplyable voltage and current specification data corresponding to the selected selectable voltage and current option as a selected supply voltage value, and determines whether the supplyable current value of the supplyable voltage and current specification data corresponding to the selected selectable voltage and current option is less than or equal to the acceptable current value of the acceptable voltage and current specification data including the acceptable voltage value that corresponds to the selected supply voltage value. When the main control unit determines that the supply current value of the supply voltage and current specification corresponding to the selected selectable voltage and current option is less than or equal to the acceptable current value of the acceptable voltage and current specification including the acceptable voltage value that matches the selected supply voltage value, the main control unit controls the power control unit to supply power to the terminal electronic device according to the supply voltage and current specification corresponding to the selected selectable voltage and current option. When the main control unit determines that the supply current value of the supply voltage and current specification corresponding to the selected selectable voltage and current option is not less than or equal to the acceptable current value of the acceptable voltage and current specification including the acceptable voltage value that matches the selected supply voltage value, the main control unit adjusts the supply current value of the supply voltage and current specification corresponding to the selected selectable voltage and current option to be less than or equal to the acceptable current value of the acceptable voltage and current specification including the acceptable voltage value that matches the selected supply voltage value, and uses the adjusted supply current value as a selected supply current value. The main control unit controls the power control unit to supply power to the terminal electronic device based on the selected supply voltage value and the selected supply current value.

[0009] In some embodiments of the display of the present invention, when the main control unit controls the power control unit to supply power to the terminal electronic device according to preset available voltage and current specifications, the preset available voltage and current specifications are displayed via a screen menu displayed on the display unit. When the main control unit controls the power control unit to supply power to the terminal electronic device according to the preset supply voltage and the preset supply current values, the preset supply voltage and the preset supply current values ​​are displayed via a screen menu displayed on the display unit. When the main control unit controls the power control unit to supply power to the terminal electronic device according to the available voltage and current specifications corresponding to the selected selectable voltage and current option, the available voltage and current specifications are displayed via a screen menu displayed on the display unit. When the main control unit controls the power control unit to supply power to the terminal electronic device according to the selected supply voltage and the selected supply current values, the selected supply voltage and the selected supply current values ​​are displayed via a screen menu displayed on the display unit.

[0010] The advantages of this invention are as follows: The display, through its input unit, allows the user to operate the on-screen menu to set the external power supply function to be on or off, enabling the user to freely choose whether to enable or disable the power supply function. Furthermore, when the main control unit determines that the external power supply function is enabled, it selects from the available voltage and current specifications one that matches the acceptable voltage and current specifications or one of the acceptable voltage and current specifications as the preset available voltage and current specifications. Based on the preset available voltage and current specifications, the main control unit controls the power control unit to supply power to the terminal electronic device, thereby making charging the terminal electronic device more convenient. Simple Explanation of the Diagram

[0011] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings.

[0012] Figure 1 is a block diagram illustrating an embodiment of the display of the present invention.

[0013] Figure 2 is the first part of a flowchart illustrating, by way of example, how steps S01 to S06 of a charging method are implemented in this embodiment.

[0014] Figure 3 is the second part of the flowchart, used to exemplarily illustrate how steps S07 to S13 of the charging method are implemented in this embodiment.

[0015] Figure 4 is the third part of the flowchart, used to exemplarily illustrate how steps S14 to S22 of the charging method are implemented in this embodiment. Implementation

[0016] Before this invention is described in detail, it should be noted that, unless otherwise defined, the term "electrically connected" in this patent specification refers to the "coupled" relationship between computer hardware (e.g., electronic systems, devices, apparatuses, units, components), and broadly refers to "wired electrical connections" achieved by physically connecting multiple computer hardware components through conductor / semiconductor materials, and "radio connections" that achieve wireless data transmission using wireless communication technologies (e.g., but not limited to wireless networks, Bluetooth, and electromagnetic induction). On the other hand, unless otherwise defined, the term "electrical connection" in this patent specification also broadly refers to "direct electrical connections" achieved by directly coupling multiple computer hardware components to each other, and "indirect electrical connections" achieved by indirectly coupling multiple computer hardware components through other computer hardware components.

[0017] Before this invention is described in detail, it should be noted that the term "unit" in this patent specification refers to computer hardware, not software. For example, "processing unit" refers to computer hardware with data processing capabilities. Furthermore, the term "unit" in this patent specification can refer to a single piece of computer hardware with a specific function, or it can refer to a group of computer hardware with similar functions. For example, "processing unit" can refer to a single processor with data processing capabilities, but it can also refer to a collection of processors.

[0018] Referring to Figure 1, one embodiment of the display 100 of the present invention is suitable for electrical connection with a terminal electronic device 7 via a cable (e.g., a Type-C cable). The terminal electronic device 7 may be a mobile phone, headset, tablet computer, or laptop computer.

[0019] In this embodiment, the display 100 includes a main control unit 1, a power supply unit 2, a power control unit 3 electrically connected to the main control unit 1 and the power supply unit 2, a storage unit 4 electrically connected to the main control unit 1, a display unit 5 electrically connected to the main control unit 1, and an input unit 6 electrically connected to the main control unit 1.

[0020] In this embodiment, the main control unit 1 is a controller implemented with integrated circuitry and possessing data processing and instruction transmission / reception functions. However, in different embodiments, the main control unit 1 may also be a circuit assembly including a controller and a circuit board, or a collection of multiple controllers.

[0021] The power supply unit 2 is a power supply device used to provide power, and can convert standard AC power into low-voltage stable DC power or directly convert DC power into low-voltage stable DC power. The power supply unit 2 stores multiple sets of available voltage and current specifications. Each set of available voltage and current specifications includes an available voltage value and an available current value.

[0022] For ease of illustration, the available voltage and current specifications are referred to here as a first available voltage and current specification, a second available voltage and current specification, and a third available voltage and current specification. The first available voltage and current specification includes, for example, a available voltage of 5V and a available current of 1A. The second available voltage and current specification includes, for example, a available voltage of 5V and a available current of 2A. The third available voltage and current specification includes, for example, a available voltage of 9V and a available current of 1.5A.

[0023] The power control unit 3 is an integrated circuit controller with data processing and command transmission / reception functions, and it is used to communicate with the terminal electronic device 7, which supports the USB PD (Power Delivery) protocol, via the CC (USB Type-C Configuration Channel) function. The power control unit 3 can be controlled by the main control unit 1 to provide power supplied by the power supply unit 2 to the terminal electronic device 7.

[0024] The storage unit 4 is a data storage device for storing digital data. However, in different embodiments, the storage unit 4 may also be a collection of multiple storage devices of the same or different types. The storage unit 4 stores power supply function on / off setting data that indicates whether the power supply is turned on or off.

[0025] The display unit 5 is an output device for displaying information or images, and is, for example, a display panel, capable of displaying a screen menu. This screen menu is, for example, an OSD (On-Screen-Display) menu.

[0026] The input unit 6 is a device that provides data or control signals to the display 100 or information device, and is, for example, a button located on the display 100, allowing the user to operate the on-screen menu to enable or disable the external power supply function setting data. For example, the on-screen menu may display an ON or OFF option. The user selects one of the ON or OFF options through the input unit 6 to enable or disable the external power supply function setting data.

[0027] It should be noted that the implementation of the main control unit 1, the power supply unit 2, the power control unit 3, the storage unit 4, the display unit 5, and the input unit 6 in this embodiment is merely an exemplary example and is not intended to limit the scope of the invention.

[0028] Referring to Figures 1 and 2, the following exemplarily describes how the display 100 of this embodiment implements steps S01 to S06 of a charging method.

[0029] First, in step S01, when the power control unit 3 is electrically connected to the terminal electronic device 7, the power control unit 3 receives one or more acceptable voltage and current specification data from the terminal electronic device 7, wherein each acceptable voltage and current specification data includes an acceptable voltage value and an acceptable current value.

[0030] For ease of illustration, the acceptable voltage and current specifications are referred to here as a first acceptable voltage and current specification and a second acceptable voltage and current specification, respectively. The first acceptable voltage and current specification includes, for example, an acceptable voltage value of 5V and an acceptable current value of, for example, 0.5A. The second acceptable voltage and current specification includes, for example, an acceptable voltage value of 9V and an acceptable current value of, for example, 0.5A.

[0031] After the power control unit 3 receives the acceptable voltage and current specification data or such acceptable voltage and current specification data from the terminal electronic device 7, the process proceeds to step S02.

[0032] In step S02, the power control unit 3 transmits the acceptable voltage and current specifications to the main control unit 1. Then, the process proceeds to step S03.

[0033] In step S03, the main control unit 1 determines whether the external power supply function is enabled or disabled according to the setting data.

[0034] When the main control unit 1 determines that the external power supply function on / off setting data indication is off, the process proceeds to step S04. When the main control unit 1 determines that the external power supply function on / off setting data indication is on, the process proceeds to step S05.

[0035] In step S04, the main control unit 1 controls the power control unit 3 to not supply power to the terminal electronic device 7.

[0036] In step S05, the main control unit 1 uses the supply voltage value that corresponds to the minimum acceptable voltage value as a preset supply voltage value. Continuing with the example above, the minimum acceptable voltage value is 5V; therefore, the main control unit 1 uses the 5V supply voltage value as the preset supply voltage value.

[0037] After the main control unit 1 obtains the preset supply voltage value, the process proceeds to step S06.

[0038] In step S06, the main control unit 1 selects the available voltage value that matches the preset available voltage value from the available voltage and current specifications, and then selects the available current value with the smallest value from the selected available voltage and current specifications.

[0039] Continuing with the example above, both the first available voltage and current specification data, which includes a available voltage value of 5V, and the second available voltage and current specification data, which includes a available voltage value of 5V, match the preset available voltage value. Therefore, the main control unit 1 selects the smallest available current value from the first available voltage and current specification data, which includes a available current value of 1A, and the second available voltage and current specification data, which includes a available current value of 2A (i.e., the first available voltage and current specification data including the available current value of 1A). Next, the process proceeds to step S07.

[0040] The above is an example of how the display 100 of this embodiment implements the charging method, steps S01 to S06.

[0041] Referring to Figures 1 and 3, the following exemplarily describes how the display 100 of this embodiment implements steps S07 to S13 of the charging method.

[0042] In step S07, the main control unit 1 determines whether the supply current value of the selected supply voltage and current specification data is less than or equal to the acceptable current value of the acceptable voltage and current specification data including the minimum acceptable voltage value.

[0043] When the main control unit 1 determines that the supply current value of the selected supply voltage and current specification is less than or equal to the acceptable current value of the acceptable voltage and current specification including the minimum acceptable voltage value, the process proceeds to step S08. When the main control unit 1 determines that the supply current value of the selected supply voltage and current specification is not less than or equal to the acceptable current value of the acceptable voltage and current specification including the minimum acceptable voltage value, the process proceeds to step S11.

[0044] Continuing with the example above, the supply current value of the supply voltage and current specification data selected by the main control unit 1 (i.e., the supply current value of the first supply voltage and current specification data including 1A) is not less than or equal to the acceptable current value of the acceptable voltage and current specification data including the minimum acceptable voltage value (i.e., the acceptable current value of the first acceptable voltage and current specification data including 0.5A). Therefore, in this embodiment, the process will proceed to step S11.

[0045] In step S08, the main control unit 1 uses the selected available voltage and current specifications as the preset available voltage and current specifications. Then, the process proceeds to step S09.

[0046] In step S09, the main control unit 1 controls the power control unit 3 to supply power to the terminal electronic device 7 according to the preset available voltage and current specifications. Then, the process proceeds to step S10.

[0047] In step S10, the main control unit 1 displays the preset available voltage and current specifications via the screen menu displayed by the display unit 5, so that the user can view the voltage and current values ​​received by the terminal electronic device 7 in real time.

[0048] In step S11, the main control unit 1 adjusts the available current value of the selected available voltage and current specification data to be less than or equal to the acceptable current value of the acceptable voltage and current specification data including the minimum acceptable voltage value, and uses the adjusted available current value as a preset available current value. Continuing the example above, the main control unit adjusts the available current value of the selected available voltage and current specification data (i.e., the available current value of the first available voltage and current specification data including 1A) to be less than or equal to the acceptable current value of the acceptable voltage and current specification data including the minimum acceptable voltage value (i.e., the acceptable current value of the first acceptable voltage and current specification data including 0.5A), and uses the adjusted available current value (e.g., 0.5A) as the preset available current value.

[0049] After the main control unit 1 obtains the preset supply current value, the process proceeds to step S12.

[0050] In step S12, the main control unit 1 controls the power control unit 3 to supply power to the terminal electronic device 7 according to the preset supply voltage value and the preset supply current value. Then, the process proceeds to step S13.

[0051] In step S13, the main control unit 1 displays the preset supply voltage value and the preset supply current value via the screen menu displayed by the display unit 5. Then, the process proceeds to step S14.

[0052] The above is an example of how the display 100 of this embodiment implements the charging method, steps S07 to S13.

[0053] Referring to Figures 1 and 4, the following exemplarily describes how the display 100 of this embodiment implements steps S14 to S22 of the charging method.

[0054] In step S14, the main control unit 1 selects one or more selectable voltage values ​​as either the available voltage value that corresponds to the acceptable voltage value or the supplyable voltage value that corresponds to each of the acceptable voltage values. Continuing with the example above, the acceptable voltage value included in the first acceptable voltage and current specification data is, for example, 5V, and the acceptable voltage value included in the second acceptable voltage and current specification data is, for example, 9V. Therefore, the main control unit 1 selects the 5V supplyable voltage value and the 9V supplyable voltage value as the selectable voltage values.

[0055] After the main control unit 1 obtains the selectable voltage value or such selectable voltage value, the process proceeds to step S15.

[0056] In step S15, the main control unit 1 selects from the available voltage and current specifications that the available voltage value matches the selectable voltage value or the selectable voltage values, and uses the selected available voltage and current specifications as a plurality of selectable voltage and current options corresponding to the available voltage and current specifications.

[0057] Continuing with the example above, the first available voltage and current specification data includes, for example, a available voltage value of 5V. The second available voltage and current specification data includes, for example, a available voltage value of 5V. The third available voltage and current specification data includes, for example, a available voltage value of 9V. Therefore, the main control unit 1 selects the first available voltage and current specification data, the second available voltage and current specification data, and the third available voltage and current specification data from these available voltage and current specification data as the selectable voltage and current options.

[0058] After the main control unit 1 selects the selectable voltage and current options, the process proceeds to step S16.

[0059] In step S16, when the user operates the screen menu through the input unit 6 to select one of the selectable voltage and current options, the main control unit 1 uses the available voltage value of the available voltage and current specification data corresponding to the selected selectable voltage and current option as a selected supply voltage value. Continuing the example above, if the user operates the screen menu through the input unit 6 to select the selectable voltage and current option corresponding to the third available voltage and current specification data, the main control unit 1 uses the 9V available voltage value included in the third available voltage and current specification data as the selected supply voltage value.

[0060] After the main control unit 1 obtains the selected supply voltage value, the process proceeds to step S17.

[0061] In step S17, the main control unit 1 determines whether the supply current value of the supply voltage and current specification data corresponding to the selected selectable voltage and current option is less than or equal to the acceptable current value of the acceptable voltage and current specification data that includes an acceptable voltage value that matches the selected supply voltage value.

[0062] When the main control unit 1 determines that the supply current value of the supply voltage and current specification data corresponding to the selected selectable voltage and current option is less than or equal to the acceptable current value of the acceptable voltage and current specification data including the acceptable voltage value that matches the selected supply voltage value, the process proceeds to step S18.

[0063] When the main control unit 1 determines that the supply current value of the supply voltage and current specification data corresponding to the selected selectable voltage and current option is not less than or equal to the acceptable current value of the acceptable voltage and current specification data including the acceptable voltage value that matches the selected supply voltage value, the process proceeds to step S20.

[0064] Continuing with the example above, the main control unit 1 determines that the supply current value of the supply voltage and current specification data corresponding to the selected selectable voltage and current option (i.e., the supply current value of the third supply voltage and current specification data including 1.5A) is not less than or equal to the acceptable current value of the acceptable voltage and current specification data including an acceptable voltage value that matches the selected supply voltage value (i.e., the acceptable current value of the second acceptable voltage and current specification data including 0.5A). Therefore, in this embodiment, the process proceeds to step S20.

[0065] In step S18, the main control unit 1 controls the power control unit 3 to supply power to the terminal electronic device 7 according to the available voltage and current specifications corresponding to the selected selectable voltage and current option. Then, the process proceeds to step S19.

[0066] In step S19, the main control unit 1 displays the available voltage and current specifications via the screen menu displayed by the display unit 5.

[0067] In step S20, the main control unit 1 adjusts the supply current value of the supply voltage and current specification data corresponding to the selected selectable voltage and current option to be less than or equal to the acceptable current value of the acceptable voltage and current specification data that includes an acceptable voltage value that matches the selected supply voltage value, and uses the adjusted supply current value as a selected supply current value.

[0068] For example, the main control unit 1 adjusts the supply current value of the supply voltage and current specification data corresponding to the selected selectable voltage and current option (i.e., the supply current value of the third supply voltage and current specification data including 1.5A) to be less than or equal to the acceptable current value of the acceptable voltage and current specification data including an acceptable voltage value that matches the selected supply voltage value (i.e., the acceptable current value of the second acceptable voltage and current specification data including 0.5A), and uses the adjusted supply current value (e.g., 0.5A) as the selected supply current value.

[0069] After the main control unit 1 obtains the selected supply current value, the process proceeds to step S21.

[0070] In step S21, the main control unit 1 controls the power control unit 3 to supply power to the terminal electronic device 7 according to the selected supply voltage value and the selected supply current value. Then, the process proceeds to step S22.

[0071] In step S22, the main control unit 1 displays the selected supply voltage value and the selected supply current value via the screen menu displayed by the display unit 5.

[0072] It should be noted that the flowcharts of steps S01 to S22, Figures 2, 3, and 4 in this embodiment are merely illustrative of one possible implementation of the charging method of the present invention. It should be understood that even if steps S01 to S22 are combined, split, or rearranged in order, if the resulting process performs similar functions and yields similar results compared to this embodiment, it still falls under the category of an implementable implementation of the charging method of the present invention. Therefore, the flowcharts of steps S01 to S22, Figures 2, 3, and 4 in this embodiment are not intended to limit the scope of implementation of the present invention.

[0073] In summary, the display 100, through the input unit 6, allows the user to operate the on-screen menu to set the external power supply function to be on or off, enabling the user to freely choose whether to enable or disable the power supply function. Furthermore, when the main control unit 1 determines that the external power supply function is enabled, the main control unit 1 selects from the available voltage and current specifications that match the acceptable voltage and current specifications or one of the acceptable voltage and current specifications as the preset available voltage and current specifications, and controls the power control unit 3 to supply power to the terminal electronic device 7 according to the preset available voltage and current specifications, thereby making charging the terminal electronic device 7 more convenient, and thus effectively achieving the purpose of the present invention.

[0074] However, the above description is merely an embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the patent specification shall still fall within the scope of the patent of the present invention.

[0075] 100: Monitor 1: Main control unit 2: Power Supply Unit 3: Power Control Unit 4: Storage Unit 5: Display Unit 6: Input Unit 7: Terminal electronic devices S01~S22: Steps

Claims

1. A display suitable for electrical connection to a terminal electronic device, comprising: a main control unit; a power supply unit storing multiple sets of available voltage and current specifications, each set of available voltage and current specifications including a available voltage value and a available current value; a power control unit electrically connected to the main control unit and the power supply unit, and controllable by the main control unit to provide power supplied by the power supply unit to the terminal electronic device; a storage unit electrically connected to the main control unit, storing external power supply function on / off setting data indicating on or off; a display unit electrically connected to the main control unit, capable of displaying a screen menu; and an input unit electrically connected to the main control unit, allowing a user to operate the screen menu to enable the main control unit to set the external power supply function on / off setting data to indicate on or off. When the power control unit is electrically connected to the terminal electronic device, the power control unit receives one or more acceptable voltage and current specification data from the terminal electronic device and transmits the acceptable voltage and current specification data, or such acceptable voltage and current specification data, to the main control unit. Each acceptable voltage and current specification data includes an acceptable voltage value and an acceptable current value. The main control unit determines whether the external power supply function on / off setting data indicates that it is on or off. When the main control unit determines that the external power supply function on / off setting data indicates that it is on, the main control unit selects one of the acceptable voltage and current specification data, or one of such acceptable voltage and current specification data, as a preset acceptable voltage and current specification data, and controls the power control unit to supply power to the terminal electronic device according to the preset acceptable voltage and current specification data. When the main control unit determines that the external power supply function on / off setting data indicates that it is off, the main control unit controls the power control unit not to supply power to the terminal electronic device.

2. The display as described in claim 1, wherein, When the main control unit selects one of the available voltage and current specifications as the preset available voltage and current specifications, it selects the available voltage value that matches the minimum acceptable voltage value as a preset supply voltage value. The main control unit then selects the available voltage value that matches the preset supply voltage value from the available voltage and current specifications, and selects the smallest available current value from the selected available voltage and current specifications. It then determines whether the available current value of the selected available voltage and current specifications is less than or equal to the acceptable current value of the available voltage and current specifications including the minimum acceptable voltage value. When the main control unit determines that the available current value of the selected available voltage and current specifications is less than or equal to the acceptable current value of the available voltage and current specifications including the minimum acceptable voltage value, the main control unit uses the selected available voltage and current specifications as the preset available voltage and current specifications.

3. The display as described in claim 2, wherein, When the main control unit determines that the supply current value of the selected supply voltage and current specification data is not less than or equal to the acceptable current value of the acceptable voltage and current specification data including the minimum acceptable voltage value, the main control unit adjusts the supply current value of the selected supply voltage and current specification data to be less than or equal to the acceptable current value of the acceptable voltage and current specification data including the minimum acceptable voltage value, and uses the adjusted supply current value as a preset supply current value; the main control unit controls the power control unit to supply power to the terminal electronic device according to the preset supply voltage value and the preset supply current value.

4. The display as described in claim 3, wherein, The main control unit uses the available voltage value that matches the acceptable voltage value or the supplyable voltage value that matches the acceptable voltage value as one or more selectable voltage values; the main control unit selects the supplyable voltage value that matches the selectable voltage value or the selectable voltage value from the supplyable voltage and current specification data, and uses the selected supplyable voltage and current specification data as a plurality of selectable voltage and current options corresponding to the supplyable voltage and current specification data; when the user operates the screen menu through the input unit to select one of the selectable voltage and current options, the main control unit uses the supplyable voltage value of the supplyable voltage and current specification data corresponding to the selected selectable voltage and current option as a selected supply voltage value, and determines whether the supplyable current value of the supplyable voltage and current specification data corresponding to the selected selectable voltage and current option is less than or equal to the acceptable current value of the acceptable voltage and current specification data including the acceptable voltage value that matches the selected supply voltage value; When the main control unit determines that the supply current value of the supply voltage and current specification data corresponding to the selected selectable voltage and current option is less than or equal to the acceptable current value of the acceptable voltage and current specification data including the acceptable voltage value that matches the selected supply voltage value, the main control unit controls the power control unit to supply power to the terminal electronic device according to the supply voltage and current specification data corresponding to the selected selectable voltage and current option; when the main control unit determines that the supply current value of the supply voltage and current specification data corresponding to the selected selectable voltage and current option is not less than or equal to the acceptable current value of the acceptable voltage and current specification data including the acceptable voltage value that matches the selected supply voltage value, the main control unit adjusts the supply current value of the supply voltage and current specification data corresponding to the selected selectable voltage and current option to be less than or equal to the acceptable current value of the acceptable voltage and current specification data including the acceptable voltage value that matches the selected supply voltage value, and uses the adjusted supply current value as a selected supply current value; The main control unit controls the power control unit to supply power to the terminal electronic device based on the selected supply voltage value and the selected supply current value.

5. The display as claimed in claim 4, wherein, When the main control unit controls the power control unit to supply power to the terminal electronic device according to preset available voltage and current specifications, the preset available voltage and current specifications are displayed on the screen menu displayed by the display unit; when the main control unit controls the power control unit to supply power to the terminal electronic device according to the preset supply voltage value and the preset supply current value, the preset supply voltage value and the preset supply current value are displayed on the screen menu displayed by the display unit; when the main control unit controls the power control unit to supply power to the terminal electronic device according to the available voltage and current specifications corresponding to the selected selectable voltage and current option, the available voltage and current specifications are displayed on the screen menu displayed by the display unit; when the main control unit controls the power control unit to supply power to the terminal electronic device according to the selected supply voltage value and the selected supply current value, the selected supply voltage value and the selected supply current value are displayed on the screen menu displayed by the display unit.

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