Patent Publication Number: US-2013235009-A1

Title: Adjusting apparatus and method for adjusting brightness of displays

Description:
BACKGROUND 
     1. Technical Field 
     The disclosure generally relates to an adjusting apparatus and method for adjusting the brightness of a display. 
     2. Description of Related Art 
     A typical display of a notebook computer includes a fixed range of luminance levels, such as 11 levels. The luminance range has 256 values which are uniformly spaced from 0 to 255. Each luminance level corresponds to a luminance value, such as the first level corresponding to 0, the second level corresponding to 20, for example. However, the luminance levels are adjusted manually by operating a device and the luminance levels of different types of displays correspond to different values. It is inefficient to adjust the luminance levels to meet required standard. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
         FIG. 1  is a schematic diagram of an adjusting apparatus according to one embodiment of the present disclosure. 
         FIG. 2  is another schematic diagram of an adjusting apparatus according to one embodiment of the present disclosure. 
         FIG. 3  is a flow diagram of an adjusting method according to one embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean at least one. 
     In general, the word “module”, as used herein, refers to logic embodied in hardware or firmware, or to a collection of software instructions, written in a programming language, such as, Java, C, or assembly. One or more software instructions in the modules may be embedded in firmware, such as in an EPROM. The modules described herein may be implemented as either software and/or hardware modules and may be stored in any type of non-transitory computer-readable medium or other storage device. Some non-limiting examples of non-transitory computer-readable media include CDs, DVDs, BLU-RAY, flash memory, and hard disk drives. 
       FIG. 1  is a schematic diagram of an adjusting apparatus according to one embodiment. The adjusting apparatus includes a display  10 , a host  20 , and a luminance sensing device. In one embodiment, the display  10  and the host  20  are included in a notebook, and the luminance sensing device is a CA 201  color analyzer  30 . The color analyzer  30  includes an analyzer body  31  and a sensor  33  connected to the analyzer body  31 . The sensor  33  is used for sensing the brightness of the backlight board. The analyzer body  31  is connected to the host  20  via a cable. In one embodiment, the cable is a USB cable. 
     Referring to  FIG. 2 , the host  20  includes a control module  21  connected to the display  10 , a comparing module  23  connected to the color analyzer  30 , and BIOS module  25 . The control module  21  is configured to control the display to display according to an initial luminance value. The color analyzer  30  is configured to sense the current brightness of the display  10 , convert the current brightness to a current luminance value, and send the current luminance value to the comparing module  23  of the host  20 . The comparing module  23  is configured to compare the current luminance value with a reference luminance value. If the current luminance value matches with the reference values, the comparing module  23  stores the initial luminance value and the display information of the display to the BIOS module  25 . If the current luminance value does not match with the reference values, the control module  21  decreases the initial luminance value and control the display  10  to display according to the decreased initial luminance value. In one embodiment, the BIOS module  25  includes a storing module for storing the initial luminance value and the display information. In one embodiment, the storing module is EPROM module. 
     Referring to  FIG. 3 , an embodiment of an adjusting method for adjusting brightness is shown as below. 
     S 301 , the control module  21 , of the host  20 , causes the display  10  to display according to an initial luminance value. In one embodiment, the initial luminance value is 255. 
     S 302 , the sensor  33  of the color analyzer  30  senses the current brightness of the display  10 , and sends a current luminance value, corresponding to the current brightness, to the comparing module  23  of the host  20 . 
     S 303 , the comparing module  23  compares the current luminance value with a reference luminance value of the first level. The comparing module  23  determined if the current luminance value matches with the reference luminance value. 
     S 304 , the comparing module  23  stores the initial luminance value and the display information of the display  10  to the BIOS module  25 . The display information includes the type of the display. 
     S 305 , the control module  21  decreases the initial luminance by 1, and the flow turns to S 301 . 
     In the above method, the control module  21  decreases the initial luminance value by 1 to a second initial luminance value, after the step S 304 , and controls the display  10  to display according to the second initial luminance value. The sensor  33  of the color analyzer  30  senses the second current brightness of the display  10  and sends a second current luminance value to the comparing module  23 . The comparing module  23  compares the second current luminance value with a second reference luminance value of the second level. The comparing module  23  stores the different initial luminance values in the BIOS module  25  in this way. 
     It is to be understood, however, that even though numerous characteristics and advantages have been set forth in the foregoing description of embodiments, together with details of the structures and functions of the embodiments, the disclosure is illustrative only and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed. 
     Depending on the embodiment, certain steps or methods described may be removed, others may be added, and the sequence of steps may be altered. It is also to be understood that the description and the claims drawn for or in relation to a method may include some indication in reference to certain steps. However, any indication used is only to be viewed for identification purposes and not as a suggestion as to an order for the steps.