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Fast screen brightness reducing method of portable mobile terminal

A screen brightness and mobile terminal technology, applied in cathode ray tube indicators, telephone structures, instruments, etc., can solve problems such as CPU time occupation, achieve the effects of occupying less CPU clock cycles, increasing speed, and reducing brightness

Inactive Publication Date: 2007-01-31
HISENSE +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that lowering screen brightness in portable mobile terminals affects the running speed of low-speed devices and takes up a lot of CPU time, the present invention proposes a method for quickly reducing screen brightness, which takes into account the characteristics of general CPUs and utilizes the ALU in most CPUs The efficiency of addition and shifting of (operator) is far greater than the characteristics of multiplication and division, and the present invention can greatly improve the calculation speed

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  • Fast screen brightness reducing method of portable mobile terminal
  • Fast screen brightness reducing method of portable mobile terminal
  • Fast screen brightness reducing method of portable mobile terminal

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Embodiment Construction

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0036] The display device of the portable mobile terminal has a display buffer, and the function of the display buffer is to refresh the screen. There is a contradiction in the refresh process of the screen, that is, the contradiction between speed and precision. For applications that require the brightness of the background interface to be dimmed when the information prompts appear in the portable mobile terminal, the response speed of the screen change is the most important. Therefore, for low-speed portable mobile terminals, it is best to use a method that reduces the CPU computing time and improves the response speed. method to achieve the desired screen brightness.

[0037] Generally, the color of the display device of the portable mobile terminal is represented by the three primary colors of RGB, that is, the three colors of red, green and blue are...

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Abstract

The invention discloses a method for rapidly decreasing the screen-brightness of the portable mobile terminal. The second power conversion includes shifting the color value of the screen pixel to a low bit and shielding the low value got by the integral shift and the mask with the high bit of color-component of 0. The non-second power conversion can be fit by the known second power.

Description

technical field [0001] The invention relates to a method for changing the screen brightness of various portable mobile terminals and PDA devices with color raster display devices, and more particularly, to a method for reducing screen brightness for devices with a screen buffer bitmap and capable of displaying graphics. Background technique [0002] Currently, on most small portable handheld devices with screen buffers, such as electronic products such as mobile terminals or PDAs, it is often necessary to quickly and locally change the screen brightness of the device. Such a large number of repetitive functions are often used for switching between interfaces or for information prompts. For example, on a mobile terminal, when deleting the phone book, a dialog box appears to prompt the user whether to confirm the deletion operation. At this time, the brightness of the background interface usually changes. Darker to better highlight the dialog and draw the user's attention to t...

Claims

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Application Information

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IPC IPC(8): H04Q7/32H04M1/02G09G5/10H04M1/22
Inventor 陈操
Owner HISENSE
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