Abstract:
A display comprising: a display module for displaying video signals thereon, a backlight module for emitting light towards the display module, and a controller electrically coupled with the backlight module for providing a control signal to the backlight module for disabling or enabling the backlight module. At a first time point, preset by the controller, the control signal disables the backlight module. An electronic device using the display is also disclosed.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The disclosed embodiments relate to electronic devices and, more particularly, to a display of an electronic device having an energy saving function for reducing power consumption. 
         [0003]    2. Description of Related Art 
         [0004]    With the rapid development of technologies, energy demands, such as electricity, have been rapidly increasing. It has been more and more important to reduce power consumption in today&#39;s society. Therefore, power consumption has become an important factor to judge the performance of electronic devices, such as televisions. 
         [0005]    Some methods, such as reducing brightness of a reproduced image, can be used to reduce the power consumption for televisions and other display device. Manufacturers usually embed programs for users to adjust brightness. 
         [0006]    However, these manufacturer&#39;s programs are limited in their usage and reducing power consumption should be a continuous and uninterrupted motion, other new methods and corresponding programs are still needed to be developed. 
         [0007]    Therefore, a need exists for an electronic device resolving the above problem in the industry. 
       SUMMARY 
       [0008]    A display comprising: a display module for displaying video signals thereon, a backlight module for emitting light towards the display module, and a controller electrically coupled with the backlight module for providing a control signal to the backlight module for disabling or enabling the backlight module. At a first time point, preset by the controller, the control signal disables the backlight module. An electronic device using the display is also disclosed. 
         [0009]    Other advantages and novel features will become more apparent from the following detailed description of embodiments when taken in conjunction with the accompanying drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0010]      FIG. 1  is a block diagram of hardware infrastructure of an electronic device in accordance with a first exemplary embodiment. 
           [0011]      FIG. 2  is a block diagram of hardware infrastructure of an electronic device in accordance with a second exemplary embodiment. 
       
    
    
     DETAILED DESCRIPTION 
       [0012]    The disclosed embodiments involve in turning off the display function of an electronic device according to instructions inputted, so as to save energy. The following detailed descriptions of embodiments are made with reference to the attached drawings, in detail. 
         [0013]    Referring to  FIG. 1 , a first embodiment in accordance with a present electronic device includes an antenna  10 , an input processor  12 , a demodulator  14 , a decoder  15 , a demultiplexer  16 , a video processor  17 , an audio processor  18 , a speaker  19 , a display  20 , and a remote unit  28 . The display  20  includes a memory  22 , a receiving unit  24 , a display module  25 , a controller  26 , and a backlight module  30  for emitting light towards the display module  25 . In this embodiment, the electronic device  100  is a television. 
         [0014]    The antenna  10  is connected to the input processor  12 , the input processor  12  is connected to the demodulator  14 , and the demodulator  14  is connected to the decoder  15 . The demultiplexer  16  is connected to the decoder  15 , the video processor  17 , and the audio processor  18 . The audio processor  18  is connected to the speaker  19 . The display module  25  is connected to the video processor  17  and the backlight module  30 . The controller  26  is connected to the video processor  17 , the memory  22 , the receiving unit  24 , and the backlight module  30 . 
         [0015]    The antenna  10  receives broadcast signals, and the broadcast signals are processed by the input processor  12  to generate resultant signals. The resultant signals are further demodulated and decoded by the demodulator  14  and the decoder  15  respectively and successively, so as to generate a transport datastream. The transport datastream is demultiplexed into video and audio data by the demultiplexer  16 . 
         [0016]    The video processor  17  processes the video data, and outputs video signals to the display module  25 . The backlight module  30  emits the light towards the display module  25 , the display module  25  allows some of the light to pass through according to the video signals, so as to display the video signals. 
         [0017]    Similarly, the audio processor  18  processes the audio data, and outputs audio signals, synchronized with the associated video signals, to the speaker  19  for audio reproduction. 
         [0018]    The memory  22  stores a timing program. In order to preset a first time point T f  and a second time point T s , the remote unit  28  generates timing signals according to instructions from users, and wirelessly sends the timing signals to the receiving unit  24 . The controller  26  calls the timing program to preset the first time point T f  and the second time point T s , for example 12:00 and 13:00, according to the timing signals. The first time point T f  could be set to disable the backlight module  30  and the second time point T s  could be set to enable the backlight module  30 . The first time point T f  and the second time point T s  are stored in the memory  22 . 
         [0019]    At the first time point T f , a first control signal is generated by the controller  26  for disabling the backlight module  30 . Thus the backlight module  30  does not emit the light, and the audio processor  18  still outputs audio signals to the speaker  19  for audio reproduction. Therefore, users can listen to the audio output, without the associated video output, of a television (TV), and the power consumption of the electronic device  100  is reduced. In another embodiment, at the first time point, the first control signal disables both the video processor  17  and the backlight module  30 . Thus the backlight module  30  does not emit the light, and the video processor  17  does not output the video signals to the display module  25 , but the audio processor  18  still outputs audio signals to the speaker  19 . Therefore, users can listen to the audio output, without the associated video output, of the TV, and the power consumption of the electronic device  100  is further reduced. 
         [0020]    At the second time point T s , the controller  26  generates a second control signal for enabling the backlight module  30 . Thus the backlight module  30  emits the light, and the video processor  17  still outputs the video signals to the display module  25 , for wake up purpose. Therefore the time required for the display module  25  to display the video signals is reduced, as compared to the video processor  17  being disabled. In another embodiment, as mentioned above, at the second time point T s , the second control signal enables both the video processor  17  and the backlight module  30 . 
         [0021]    The remote unit  28  includes a control key  280 . The control key  280  is used to manually enable the backlight module  30  or the video processor  17 . When the control key  280  is pressed, the remote unit  28  generates a command. The receiving unit  24  receives the command, and the controller  26  generates a third control signal according to the command. The third control signal enables the backlight module  30  which has been disabled. In another embodiment, as mentioned above, the third control signal enables both the backlight module  30  and the video processor  17  which have been disabled. 
         [0022]    The backlight module  30  includes a power supply  300 , a switch unit  302 , and a backlight unit  304 . The controller  26  is connected to the switch unit  302 . The switch unit  302  is connected between the power supply  300  and the backlight unit  304 . The backlight unit  304  is connected to the display module  25 . 
         [0023]    The power supply  300  provides power to the backlight unit  304  via the switch unit  302 . The backlight unit  304  receives the power from the power supply  300 , and emits the light towards the display module  25 . The display module  25  receives the video signals from the video processor  17  and allows some of the light to pass through according to the video signals, so as to display the video signals. 
         [0024]    The switch unit  302  establishes and cuts off an electronic connection between the power supply  300  and the backlight unit  304 . The controller  26  controls the switching action of the switch unit  302 . In detail, when the electronic device  100  is powered on, the switch unit  302  is turned on, and the switch unit  302  electrically connects the power supply  300  to the backlight unit  304 . When the switch unit  302  is turned off, the switch unit  302  cuts off the electronic connection between the power supply  300  and the backlight unit  304 . 
         [0025]    At the first time point T f , the controller  26  generates the first control signal for turning off the switch unit  302 . Therefore the backlight unit  304  does not receive the power from the power supply  16  and does not emit the light. In another embodiment, the first control signal turns off the switch unit  302  and disables the video processor  17 . Therefore the backlight unit  304  does not emit light, and the video processor  17  does not output the video signals to the display module  25 . 
         [0026]    At the second time point T s , the controller  26  generates the second control signal for turning on the switch unit  302 . Thus, the backlight unit  304  receives the power from the power supply  16  and emits the light. In another embodiment, the second control signal turns on switch unit  302  and enables the video processor  17 . Thus the video processor  17  outputs the video signals to the display module  25 , and the backlight unit  304  receives the power from the power supply  16  and emits the light. 
         [0027]    When the control key  280  is pressed, the remote unit  28  generates the command. The receiving unit  24  receives the command, and the controller  26  generates the third control signal according to the command. The third control signal turns on the switch unit  302  which has been turned off. In another embodiment, the third control signal enables the video processor  17  which has been disabled and turns on the switch unit  302  which has been turned off. Therefore, the display module  25  displays the video signals. 
         [0028]    Referring to  FIG. 2 , a second embodiment in accordance with present electronic device includes a video processor  27 , an audio processor  28 , a memory  32 , an receiving unit  34 , a remote unit  38 , a backlight module  40 , a display module  42 , a demultiplexer  44 . The backlight module  40  includes a power supply  400 , a switch unit  402 , and a backlight unit  404 . 
         [0029]    The demultiplexer  44  includes a controller  440 . The video processor  27 , the audio processor  28 , the memory  32 , the receiving unit  34 , the remote unit  38 , the backlight module  40 , the display module  42 , and the controller  440  performs the same function as the video processor  17 , the audio processor  18 , the memory  22 , the receiving unit  24 , the remote unit  28 , the backlight module  30 , the display module  25 , and the controller  26  shown in  FIG. 1  respectively. 
         [0030]    The power supply  400  provides the power to the backlight unit  404  via the switch unit  402 . The backlight unit  404  receives the power from the power supply  400 , and emits light towards the display module  42 . The display module  42  receives the video signals from the video processor  27  and allows some of the light to pass through according to the video signals, so as to display the video signals. 
         [0031]    At the first time point T f , the controller  440  generates the first control signal for turning off the switch unit  402 . In another embodiment, the first control signal turns off the switch unit  402  and disables the video processor  27 . Thus, the power consumption of the electronic device  200  is reduced. 
         [0032]    At the second time point, the controller  440  generates the second control signal for turning on the switch unit  402 . In another embodiment, the second control signal turns on the switch unit  402  and enables the video processor  27 . 
         [0033]    The remote unit  38  includes a control key  380 . When the control key  380  is pressed, the controller  440  generates the third control signal. The third control signal turns on the switch unit  402  that has been turned off. In another embodiment, the third control signal enables the video processor  27  that has been disabled and turns on the switch unit  402  that has been turned off. Therefore, the video processor  27  outputs the video signals to the display module  42 , the backlight unit  404  emits the light, and the display module  42  displays the video signals. 
         [0034]    Alternative embodiments will become apparent to those skilled in the art to which the present invention pertains without departing from the spirit and scope. Accordingly, the present invention should be deemed not to be limited to the above detailed description, but rather by the claims that follow.