TWI442378B - Brightness-adjusting device for display screen and adjusting method of same - Google Patents

Description

Screen brightness adjusting device and adjusting method

The invention relates to a screen brightness adjusting device and a adjusting method thereof, in particular to a screen brightness adjusting device and a adjusting method applied in a portable electronic device.

With the continuous updating and development of technology, portable electronic devices such as mobile phones or personal digital assitants (PDAs) have been widely used in people's daily lives.

Generally, portable electronic devices are used in different lighting environments. When the portable electronic device is used in a dimly lit environment, the screen is bright and glaring, and when used under the sun in the daytime, the screen is dim and blurred. In this way, the industry usually installs a brightness sensing device on the portable electronic device to automatically adjust the brightness of the screen.

However, for a portable electronic device that is used outdoors for a long time, the brightness sensing device automatically increases the brightness of the screen, which will inevitably result in a large power consumption of the portable electronic device and shorten the standby time.

In view of the above, it is necessary to provide a screen brightness adjusting device and an adjusting method for extending the standby time.

A screen brightness adjusting device comprises: a photosensitive module for detecting an actual brightness value of an external environment; a storage module for storing a predetermined standard brightness value; a rechargeable battery; a solar battery; a switch a backlight module electrically connected to the rechargeable battery or the solar cell through the switch; a brightness comparison module, the input end of the brightness comparison module is electrically connected to the photosensitive module and the storage module, and the output end thereof is electrically Connected to the switch, the brightness comparison module is configured to compare the actual brightness value with the standard brightness value, and convert the comparison result into a corresponding electrical signal and transmit it to the switch.

A method for adjusting a brightness of a screen, comprising: providing a storage module and a brightness comparison module, storing a predetermined standard brightness value through the storage module, and transmitting the standard brightness value to the brightness comparison module; a photosensitive module detects an actual brightness value of an external environment through the photosensitive module, and transmits the actual brightness value to the brightness comparison module, wherein the brightness comparison module determines whether the actual brightness value is greater than a standard brightness value And converting the comparison result into a corresponding electrical signal; providing a switch, the switch accepting the electrical signal and operating according to the electrical signal; if the actual brightness value is greater than the standard brightness value, the switch is switched to the solar cell Connected, otherwise, the switch is switched to communicate with the rechargeable battery.

Compared with the prior art, the brightness adjustment device determines the ambient brightness of the mobile phone through the brightness comparison module, and switches the power consumption of the mobile phone and adjusts the backlight brightness of the backlight module according to the determination result. In the case of high brightness of the external environment, by using solar cells as the energy source of the mobile phone, not only the backlight brightness of the backlight module is improved, so that the display screen is clearly seen, and the power of the rechargeable battery is not consumed at all, thus extending The standby time of the mobile phone.

10‧‧‧Screen brightness adjustment device

11‧‧‧ Press the surface

12‧‧‧ Storage Module

13‧‧‧Brightness adjustment module

14‧‧‧Backlight module

15‧‧‧Toggle switch

16‧‧‧Rechargeable battery

17‧‧‧Solar battery

18‧‧‧Brightness comparison module

1 is a functional block diagram of a preferred embodiment of the screen brightness adjusting device of the present invention; and FIG. 2 is a flow chart of a preferred embodiment of the screen brightness adjusting device of the present invention.

The invention discloses a screen brightness adjusting device which is suitable for adjusting the brightness of a screen of a portable electronic device such as a mobile phone or a personal digital assitant (PDA). In the embodiment, a mobile phone is taken as an example for illustration.

Referring to FIG. 1 , the screen brightness adjusting device 10 includes a photosensitive module 11 , a storage module 12 , a brightness adjusting module 13 , a backlight module 14 , a switch 15 , a rechargeable battery 16 , and a solar battery . 17 and a brightness comparison module 18.

The rechargeable battery 16 and the solar battery 17 are electrically connected to the backlight module 14 via the changeover switch 15. The input end of the brightness comparison module 18 is electrically connected to the photosensitive module 11 and the storage module 12, and the output end thereof is electrically connected to the brightness adjustment module 13 and the switch 15.

The photosensitive module 11 is configured to detect an actual brightness value of an external environment.

The storage module 12 is configured to store a predetermined standard brightness value, and the predetermined standard brightness value can be adjusted as needed.

The brightness adjustment module 13 is configured to adjust the backlight brightness of the backlight module 14 .

The backlight module 14 is installed in the mobile phone for supplying sufficient brightness and a uniformly distributed light source to enable the screen to display images normally.

The switch 15 is a single pole double throw switch for turning on or off the electrical connection of the backlight module 14 to the rechargeable battery 16 or the solar cell 17.

The rechargeable battery 16 may be a nickel-hydrogen rechargeable battery or a lithium ion rechargeable battery.

The solar cell 17 is a device that directly converts light energy into electrical energy through a photoelectric effect or a photochemical effect.

The brightness comparison module 18 is configured to compare the actual brightness value of the external environment detected by the photosensitive module 11 with a predetermined standard brightness value stored by the storage module 12, and convert the comparison result into a corresponding electrical signal. And transmitted to the brightness adjustment module 13 and the changeover switch 15. If the actual brightness value is less than or equal to the standard brightness value, the switch 15 will switch to communicate with the rechargeable battery 16, and the brightness adjustment module 13 will lower the backlight brightness of the backlight module 14; if the actual brightness value is greater than The standard brightness value, the switch 15 will switch to communicate with the solar cell 17, and the brightness adjustment module 13 will increase the backlight brightness of the backlight module 14.

Referring to FIG. 2, when the screen brightness adjusting device 10 is used, a predetermined standard brightness value is first stored by the storage module 12, and the standard brightness value is transmitted to the brightness comparison module 18; The actual brightness value of the external environment is measured, and the actual brightness value is transmitted to the brightness comparison module 18; then the brightness comparison module 18 determines whether the actual brightness value is greater than the standard brightness value, and transmits the comparison result to the brightness adjustment. The module 13 and the switch 15 are switched, and the switch 15 is switched to communicate with the solar cell 17, and the brightness adjustment module 13 increases the backlight brightness of the backlight module 14, otherwise, the switch 15 is switched to the rechargeable battery. The 16 phases are connected, and the brightness adjustment module 13 lowers the backlight brightness of the backlight module 14.

It can be understood that the storage module 12 can also store two or more predetermined standard brightness values, and the brightness comparison module 18 detects the actual brightness value of the external environment and the predetermined condition of the photosensitive module 11. The standard brightness values are compared one by one, so that the range of the actual brightness value can be more accurately confirmed, and the actions of the brightness adjustment module 13 and the changeover switch 15 are controlled according to the comparison result.

The brightness adjustment device 10 determines the ambient brightness of the mobile phone through the brightness comparison module 18, and switches the power consumption of the mobile phone according to the determination result, and automatically adjusts the backlight brightness of the backlight module 14, so that the brightness is When the brightness of the environment is high, by using the solar battery 17 as the energy source of the mobile phone, not only the backlight brightness of the backlight module 14 is improved, so that the display screen is clearly seen, and the power of the rechargeable battery 16 is not consumed at all. Extend the standby time of the mobile phone.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application.

10‧‧‧Screen brightness adjustment device

11‧‧‧ Press the surface

12‧‧‧ Storage Module

13‧‧‧Brightness adjustment module

14‧‧‧Backlight module

15‧‧‧Toggle switch

16‧‧‧Rechargeable battery

17‧‧‧Solar battery

18‧‧‧Brightness comparison module

Claims (7)

A screen brightness adjusting device comprises: a photosensitive module for detecting an actual brightness value of an external environment; a storage module for storing a predetermined standard brightness value; a rechargeable battery; a solar battery; a switch a backlight module electrically connected to the rechargeable battery or the solar cell through the switch; a brightness comparison module, the input end of the brightness comparison module is electrically connected to the photosensitive module and the storage module, and the output end thereof is electrically Connected to the switch, the brightness comparison module is configured to compare the actual brightness value with the standard brightness value, and convert the comparison result into a corresponding electrical signal, and transmit the switch to the switch, the switch is a single-pole double-throw switch . The screen brightness adjusting device of claim 1, wherein the brightness adjusting device further comprises a brightness adjusting module, wherein the brightness adjusting module and the output of the backlight module and the brightness comparison module are electrically Connection, used to adjust the backlight brightness of the backlight module. The screen brightness adjusting device according to claim 1, wherein the rechargeable battery is a nickel-hydrogen rechargeable battery or a lithium ion rechargeable battery. A method for adjusting the brightness of a screen includes the following steps: providing a storage module and a brightness comparison module, storing a predetermined standard brightness value through the storage module, and transmitting the standard brightness value to the brightness comparison module Providing a photosensitive module, wherein the actual brightness value of the external environment is detected by the photosensitive module, and the actual brightness value is transmitted to the brightness comparison module, and the brightness comparison module determines whether the actual brightness value is greater than a standard a brightness value, and converting the comparison result into a corresponding electrical signal; providing a switch, the switch accepting the electrical signal and operating according to the electrical signal; if the actual brightness value is greater than the standard brightness value, the switch is switched to The solar cells are connected, otherwise the switch is switched to be in communication with the rechargeable battery. The screen brightness adjustment method of claim 4, wherein the screen brightness adjustment method provides a brightness comparison module, and the comparison result is further transmitted to the brightness comparison module, The brightness comparison module accepts the comparison result and operates according to the comparison result. If the brightness adjustment module increases the backlight brightness of the backlight module, the brightness adjustment module reduces the backlight brightness of the backlight module. The method according to claim 4, wherein the switch is a single-pole double-throw switch. The method according to claim 4, wherein the rechargeable battery is a nickel-hydrogen rechargeable battery or a lithium ion rechargeable battery.