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Keyboard backlight device and control method thereof

A keyboard backlight and backlight control technology, which is applied in the field of keyboard backlight devices, can solve problems such as inability to adjust, excessive power consumption, and consumption, and achieve the effect of reducing use

Inactive Publication Date: 2010-06-30
江西联速科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, sometimes when using a computer outdoors at night, if there is no external light source illuminating the keyboard, the user cannot see the position of the keys on the keyboard clearly, and can only type by luck.
Even if the machine has a device that can illuminate the keyboard, it must consume more power and cannot be adjusted according to the brightness of the outside world

Method used

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  • Keyboard backlight device and control method thereof
  • Keyboard backlight device and control method thereof
  • Keyboard backlight device and control method thereof

Examples

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no. 1 example

[0021] Please refer to figure 1 , figure 1 It is a circuit diagram of the keyboard backlight device according to the first embodiment of the present invention. The keyboard backlight device 100 includes a basic input output system 110 , a backlight control unit 120 , a light sensor unit 130 and a keyboard backlight 140 . The light sensing unit 130 is mainly composed of a resistor 132 connected in series with a photoresistor 134 . The keyboard backlight 140 includes a light emitting diode module 142 and a resistor 144 . The backlight control unit 120 is coupled to the BIOS 110 in the system, and the light sensor unit 130 and the keyboard backlight 140 are respectively coupled to two pins A / D and PWM of the backlight control unit 120 .

[0022] The resistor 132 and the photoresistor 134 in the light sensing unit 130 are coupled in series between the voltage source VCC and the ground terminal GND. Since the resistance value of the photoresistor 134 changes according to the inte...

no. 2 example

[0032] From another point of view, the above-mentioned first embodiment can summarize a control method of a keyboard backlight device, please refer to image 3 , image 3 It is the control method of the keyboard backlight device according to the second embodiment of the present invention. Firstly, a keyboard brightness menu is provided in the BIOS menu for a user to set a default brightness of the environment and a default brightness of the keyboard (step S310 ). Then, sense an ambient brightness and output an ambient brightness signal according to the ambient brightness (step S320 ), and then convert the ambient brightness signal into an ambient brightness value (step S330 ). Then, compare the external brightness value with the default external brightness value, and when the external brightness value is less than or equal to the external brightness default value, turn on a keyboard backlight, and adjust the brightness of the keyboard backlight according to the default keyboa...

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Abstract

The invention discloses a keyboard backlight device and a control method thereof, and the keyboard backlight device comprises a backlight control unit, a keyboard backlight source and an optical sensing unit. The optical sensing unit is used for sensing an external brightness and outputting an external brightness signal to the backlight control unit accordingly, the backlight control unit is usedfor converting the external brightness signal to an external brightness value and comparing the external brightness value with an external brightness default value, when the external brightness valueis smaller than or equal to the external brightness default value, the backlight control unit can automatically open the keyboard backlight source and adjust the brightness of the keyboard backlight source according to a keyboard brightness default value.

Description

technical field [0001] The present invention relates to a keyboard backlight device, and in particular to a keyboard backlight device capable of adjusting the brightness of the backlight according to the external brightness and its control method. Background technique [0002] A notebook computer is a small, portable personal computer. The current development trend is that the volume is getting smaller and lighter, but the function is more powerful. In order to reduce the size, notebook computers usually have LCD monitors. In addition to the keyboard, a touchpad (touchpad) or a touch point is also installed as a pointing device (Pointing device). [0003] With the advancement of technology, notebook computers are not only light and thin in appearance but also have complete functions. Due to the convenience of carrying and cheaper prices, notebook computers have gradually replaced desktop computers. At present, the use of notebook computers has been quite common, and has b...

Claims

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Application Information

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IPC IPC(8): H05B37/02H01H13/83
Inventor 罗圣心
Owner 江西联速科技有限公司
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