JP4175730B2 - Information processing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an information processing apparatus having a liquid crystal display device using a backlight.
[0002]
[Prior art]
Conventionally, a liquid crystal display device has been used as a display means of an information processing device such as a portable information terminal. As the phase transition type liquid crystal used in the liquid crystal display device, there are a transmissive liquid crystal and a reflective liquid crystal.
[0003]
A liquid crystal display device using a transmissive liquid crystal has a structure in which a backlight is disposed on the back side of the liquid crystal panel, and the liquid crystal panel undergoes phase transition by applying a voltage to the liquid crystal panel, and light from the backlight is transmitted through the display surface. Display by blocking. This type using transmissive liquid crystal can recognize the display screen even in a dark place, but has a problem that the power consumption of the backlight is large.
[0004]
In addition, a liquid crystal display device using a reflective liquid crystal has a structure in which a reflective plate is disposed on the back surface of the liquid crystal panel. The liquid crystal phase is changed by applying a voltage to the liquid crystal panel, and incident light is scattered or transmitted on the display surface. Display is performed by reflection. In this type of liquid crystal display, since the light source is external light, a backlight is not required and power consumption can be reduced. On the other hand, it is difficult to recognize the display screen in a dark place. There is a problem.
[0005]
Especially for liquid crystal display devices using transmissive liquid crystals, display control such as turning off the backlight during periods when the information processing device itself has not been used for a certain period of time has been performed in order to reduce the power consumption of the backlight. It was. Japanese Patent Laid-Open No. 10-207400 has been proposed as a backlight control method in a liquid crystal display device using a transmissive liquid crystal. In this prior art, a plurality of backlights are arranged on the back surface of the liquid crystal panel, and only the backlight corresponding to a specific position on the display screen to be displayed is turned on among the plurality of backlights.
[0006]
[Problems to be solved by the invention]
By the way, in recent years, instead of the above-described liquid crystal display device using transmissive liquid crystal, information processing devices have adopted liquid crystal display devices using transflective liquid crystal to realize further low power consumption. The liquid crystal display device using the transflective liquid crystal uses external light as a light source when the surroundings are bright, and uses a transmissive liquid crystal when the surroundings are dark. Similar to the display device, a backlight is used as a light source. As described above, in a liquid crystal display device using a transflective liquid crystal, it is not necessary to turn on the backlight when the surroundings are bright, so that power consumption can be reduced.
[0007]
Although there is a demand for further reduction of power consumption for the liquid crystal display device using the transflective liquid crystal, in the past, the power consumption control of the backlight for the liquid crystal display device using the transflective liquid crystal is required. There was nothing to consider.
[0008]
The present invention has been made in consideration of the above-described circumstances. In an information processing apparatus having a liquid crystal display device using a transflective liquid crystal, the backlight is turned on according to the ambient brightness and the content of information to be displayed. It is an object of the present invention to provide an information processing apparatus that can control power consumption of a backlight by enabling the control of the backlight.
[0009]
[Means for Solving the Problems]
An information processing apparatus according to the present invention is an information processing apparatus having a liquid crystal display device using a transflective liquid crystal, and is disposed on a liquid crystal unit having first and second display areas and on a back surface of the liquid crystal unit , A first backlight having a first display area as a lighting target area, a second backlight having the second display area as a lighting target area, and the first and second backlights, respectively. A switch that individually controls lighting, a communication means for performing telephone communication and mail communication, an illuminance sensor that senses ambient illuminance, and a telephone number, an e-mail address, and an incoming call for each source information indicating whether or not to display the detailed information about the caller is previously registered memory, a display control unit for controlling the display of the liquid crystal portion, when the incoming call has occurred in the communication means, before A first lighting control means for determining whether the illuminance sensed by the illuminance sensor has reached a predetermined reference value set in advance, the illumination reaches the predetermined reference value by said first lighting control means If it is determined that the incoming call to the communication means is a telephone communication, the telephone number of the caller and information indicating that detailed information on the caller should be displayed are registered in the memory. When it is determined that the first condition is satisfied, the switch is controlled to turn on the first and second backlights, and a message notifying the incoming call is sent to the liquid crystal unit. is displayed in the second display area of, and a second lighting control means for controlling said display control means so as to display detailed information about the source in the first display area, the first condition If it is determined not to be successful, it is determined that the second condition is satisfied, in which the incoming call to the communication means is the reception of an electronic mail and the mail address of the transmission source is registered in the memory. A third control unit that controls the switch to turn on the first backlight and controls the display control unit to display the received e-mail in the first display area of the liquid crystal unit . If it is determined that the second control condition is not met, the incoming call to the communication means is telephone communication, and the telephone number of the caller and detailed information about the caller are not displayed. And the switch that controls the switch to turn on the second backlight when it is determined that the third condition that satisfies the condition that the information is registered in the memory is satisfied. In addition, a fourth lighting control means for controlling the display control means so as to display a message for notifying an incoming call in the second display area of the liquid crystal unit, and further, the fourth lighting control means, When it is determined that the third condition is not satisfied, the switch is controlled so that the first and second backlights are not turned on .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing a liquid crystal display device of an information processing apparatus according to this embodiment.
The liquid crystal display device absorbs a specific linearly polarized component and transmits other polarized components, a polarizing filter 101, a glass substrate 102, a transparent electrode 103, a liquid crystal layer 104, and reflects a specific linearly polarized component and other polarized components. A transflective polarizing film 105 that transmits light, a backlight A106, a backlight B107, a switch 108 that controls lighting of the backlight, and a CPU 109. In addition, as an auxiliary lighting device, an LED may be used instead of the backlight. When the surroundings are bright, external light incident from the outside of the polarizing filter 101 is reflected by the transflective polarizing film 105, and the reflected light is used as a light source. When the surroundings are dark, the CPU 109 controls the switch 108, and the switch 108 turns on the backlight A106, the backlight B107, or the backlight A106 and the backlight B107 at the same time, and uses light from the backlight as a light source.
[0011]
FIG. 2 shows an example of a display screen in the liquid crystal display device. As shown in FIG. 2A, the display screen of the liquid crystal display device is divided into a region 201 and a region 202, which can be displayed independently. The area 201 is a lighting target area of the backlight A106, and the area 202 is a lighting target area of the backlight B107. FIG. 2A shows a display example when both the backlight A106 and the backlight B107 are turned on. FIG. 2B shows a display example when only the backlight A106 is turned on. FIG. 3C shows a display example when only the backlight B107 is displayed.
[0012]
Next, the configuration of the information processing apparatus including the above-described liquid crystal display device will be described. FIG. 3 shows a system configuration diagram of the information processing apparatus according to the embodiment of the present invention.
[0013]
The backlight A106 supplies light to be a light source to a portion corresponding to the display screen region 201 of the liquid crystal unit 112, and the backlight B107 is supplied to a portion corresponding to the display screen region 202 of the liquid crystal unit 112. It supplies light to be used as a light source. The switch 117 controls lighting of the backlight A 106 and the backlight B 107 under the control of the CPU 109. The CPU 109 is composed of a microprocessor or the like and controls the entire information processing apparatus. The memory 110 stores various information used in the control process by the CPU 109. The LCD controller 111 controls display on the liquid crystal unit 112 under the control of the CPU 109. The liquid crystal unit 112 has a display screen shown in FIG. 2 and displays various types of information. The liquid crystal unit 112 includes the polarizing filter 101, the glass substrate 102, the transparent electrode 103, the liquid crystal layer 104, and the transflective film 105 shown in FIG. The graphic memory 113 stores display data displayed by the liquid crystal unit 112. The tablet 114 reads coordinate information input from a pen (not shown), and the tablet 114 is integrated with the liquid crystal unit 112. The illuminance sensor 115 is for sensing the brightness around the information processing apparatus. The real time clock 116 is for measuring time. The telephone function unit 117 performs communication with a wireless base station such as a mobile phone or a PHS.
[0014]
Next, the operation of the display control process in the information processing apparatus configured as described above will be described.
When an incoming call from another information processing apparatus occurs in the telephone function unit 117 (step 401), the CPU 109 detects this and senses ambient brightness by the illuminance sensor 115 (step 402). The CPU 109 determines whether or not the illuminance sensed by the illuminance sensor 115 is higher than a predetermined reference value (step 403). If the illuminance is higher than the reference value, the backlight A107 and the backlight B108 are turned on. Instead, information corresponding to the incoming call is displayed on the liquid crystal unit 112 via the LCD controller 111 (step 410). Here, as shown in FIG. 5, in the memory 110, for each caller, a telephone number, an e-mail address, and a flag (details) indicating whether or not to display detailed information about the caller when an incoming call is received. Information setting flag) is stored. The value of the detailed information display flag is set to “1” for those that display detailed information regarding the sender, and “0” is set for those that do not display.
[0015]
The CPU 109 determines display contents to be displayed on the liquid crystal unit 112 based on the setting information. That is, when the telephone function unit 117 receives a telephone number transmitted from the radio base station, the CPU 109 refers to the setting information in the memory 110 based on the received telephone number, and corresponds to the received telephone number. Identify the originator. Then, according to the specified sender, a message notifying the incoming call such as “Call me from ***” is displayed in the area 202 of the display screen as shown in FIG. At this time, if the detailed information display flag is “1”, the CPU 109 displays detailed information regarding the identified caller in the area 201 of the display screen. Note that a message for notifying incoming calls and detailed information on the caller are stored in the memory 110. When displaying these pieces of information, the CPU 109 takes out information to be displayed from the memory 110 and outputs the information to the graphic memory 113, and controls the LCD controller 111 so that the output information is displayed on the liquid crystal unit 112. Note that detailed information regarding the transmission source is stored in the memory 110 for each transmission source. The setting information stored in the memory 110 is information that can be set separately by the user, and the value of the detailed information display flag is also set in advance by the user.
[0016]
When the telephone function unit 117 receives an e-mail, the CPU 109 displays the received e-mail in the area 201 of the display screen as shown in FIG.
[0017]
On the other hand, if it is determined in step 403 that the illuminance sensed by the illuminance sensor 115 has not reached a predetermined reference value, the CPU 109 will be described below based on the setting information stored in the memory 110. It is determined whether or not the determination criteria A to C are satisfied, and lighting control of the backlight A 106 and the backlight B 107 is performed according to the determination result.
[0018]
First, the CPU 109 determines whether or not the determination criterion A is satisfied (step 404). That is, when the incoming call by the telephone function unit 117 is telephone communication and the telephone number of the caller is registered in the setting information of the memory 110, and the detailed information display flag is “1”, the CPU 109 It is determined that the determination criterion A is satisfied, and the switch 108 is controlled to turn on the backlight A106 and the backlight B107 (step 405). Then, CPU 109 displays a message for notifying incoming calls in area 202 of the display screen of liquid crystal unit 112 and detailed information regarding the caller in area 201 (step 410). The display screen when it is determined that the determination criterion A is satisfied is as shown in FIG.
[0019]
If it is determined in step 404 that the determination criterion A is not satisfied, the CPU 109 subsequently determines whether or not the determination criterion B is satisfied (step 406). That is, when the incoming call by the telephone function unit 117 is reception of an e-mail and the mail address of the sender is registered in the setting information of the memory 110, the CPU 109 determines that the determination criterion B is satisfied, and the switch Control is performed to turn on the backlight A106 for 108 (step 407). Then, the CPU 109 displays the received e-mail in the display screen area 201 of the liquid crystal unit 112 (step 410). The display screen when it is determined that the determination criterion B is satisfied is as shown in FIG.
[0020]
When determining in step 406 that the determination criterion B is not satisfied, the CPU 109 determines whether or not the determination criterion C is satisfied (step 408). That is, when the incoming call by the telephone function unit 117 is telephone communication and the telephone number of the caller is registered in the setting information of the memory 110, and the detailed information display flag is “0”, the CPU 109 Then, it is determined that the determination criterion C is satisfied, and the switch 108 is controlled to turn on the backlight B107 (step 409). Then, the CPU 109 displays a message notifying the incoming call on the display screen area 202 of the liquid crystal unit 112 (step 410). The display screen when it is determined that the determination criterion C is satisfied is as shown in FIG.
[0021]
On the other hand, in step 408, if the incoming call is a call whose source is not registered in the setting information of the memory 110 or an e-mail whose caller is not registered in the setting information of the memory 110, the CPU 109 satisfies the criterion C. Therefore, the backlight A106 and the backlight B107 are controlled not to be turned on. Subsequently, when an electronic mail is received by the telephone function unit 117, the CPU 109 displays the electronic mail in the area 201 of the display screen of the liquid crystal unit 112 (step 410).
[0022]
When the screen is displayed in step 410, the CPU 109 next refers to the real time clock 116 to determine whether or not there is no input from the tablet 114 for a predetermined time. The power supply to the light A 106 and the backlight B 107 is interrupted, and the mode shifts to the sleep mode (step 411).
[0023]
As described above, the backlight is provided with a plurality of backlights, and when the surroundings are dark, only the backlight necessary for display is turned on according to the content of the incoming call. Power can be reduced.
[0024]
In the description of the above-described embodiment, whether or not to display the detailed information regarding the caller at the time of incoming call in step 404 is determined based on the value of the detailed information display flag of the setting information in the memory 110. However, the present invention is not limited to this. For example, it may be determined whether or not the detailed information of the caller is stored in the memory 110, and the detailed information may be displayed when it is stored.
[0025]
If it is determined in step 408 that the determination criterion C is not satisfied, a voice output unit (not shown) may notify the user by voice that an incoming call or e-mail has been received. In response to the notification by voice, the user can respond to the incoming call if the incoming call is received, and the backlight B107 can be turned on by an instruction from the user if the incoming call is an e-mail.
[0026]
Further, in the description of the above-described embodiment, the display screen area is divided into two parts, and the backlight is arranged for each. However, the number of divisions of the display screen area is further increased (for example, three or more). ), A backlight may be arranged for each of them.
[0027]
【The invention's effect】
As described above in detail, according to the present invention, a configuration in which a plurality of backlights are arranged on the back surface of the liquid crystal unit, and when the ambient illuminance does not reach a predetermined reference value by the backlight lighting control unit, Since the contents of the incoming call in the communication means are determined and only the backlight corresponding to the area where the information corresponding to the incoming call content is to be displayed is turned on, the power consumption of the backlight unnecessary for display can be suppressed.
[Brief description of the drawings]
FIG. 1 is a schematic diagram illustrating a liquid crystal display device of an information processing apparatus according to an embodiment.
FIG. 2 is a view showing an example of a display screen in the liquid crystal display device according to the present embodiment.
FIG. 3 is a system configuration diagram of an information processing apparatus according to the present embodiment.
FIG. 4 is a flowchart showing a flow of backlight lighting control according to the embodiment.
FIG. 5 shows setting information stored in a memory 302 of the information processing apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 101 ... Polarizing filter 102 ... Glass substrate 103 ... Transparent electrode 104 ... Liquid crystal layer 105 ... Transflective polarizing film 106 ... Backlight A
107 ... Backlight B
108 ... Switch 109 ... CPU
110 ... Memory 111 ... LCD controller 112 ... Liquid crystal unit 113 ... Graphic memory 114 ... Tablet 115 ... Illuminance sensor 116 ... Real time clock 117 ... Telephone function unit

Claims (1)

In an information processing apparatus having a liquid crystal display device using a transflective liquid crystal,
A liquid crystal portion having first and second display areas ;
A first backlight that is disposed on the back surface of the liquid crystal unit and uses the first display area as a lighting target area; and a second backlight that uses the second display area as a lighting target area ;
A switch that individually controls lighting of the first and second backlights;
A communication means for performing telephone communication and mail communication ;
An illuminance sensor that senses ambient illuminance;
For each sender, a memory in which information indicating whether or not to display detailed information about the sender at the time of incoming call, a telephone number, an e-mail address,
Display control means for performing display control of the liquid crystal unit;
A first lighting control means for determining whether or not the illuminance sensed by the illuminance sensor has reached a predetermined reference value set in advance when an incoming call occurs in the communication means ;
When it is determined by the first lighting control means that the illuminance has not reached the predetermined reference value, the incoming call to the communication means is telephone communication, and the telephone number of the caller and the caller When it is determined that information indicating that detailed information should be displayed and the first condition that is registered in the memory satisfies the first condition, the first and second backlights are respectively turned on. The display control means for controlling the switch to display a message for notifying an incoming call in the second display area of the liquid crystal unit and to display detailed information about the caller in the first display area. a second lighting control means for controlling,
If it is determined that the first condition is not satisfied, the second condition is that the incoming call to the communication means is the reception of an electronic mail and the mail address of the sender is registered in the memory. When it is determined that the condition is satisfied, the switch is controlled to turn on the first backlight, and the display control means is configured to display the received e-mail in the first display area of the liquid crystal unit. a third lighting control means for controlling,
When it is determined that the second condition is not satisfied, the incoming call to the communication means is telephone communication, and the telephone number of the caller and information indicating that detailed information regarding the caller is not displayed are: When it is determined that the third condition, which is a condition that it is registered in the memory, is satisfied, the switch is controlled so as to turn on the second backlight, and a message notifying the incoming call is sent to the liquid crystal A fourth lighting control means for controlling the display control means so as to be displayed in the second display area of a section;
Further, when the fourth lighting control means determines that the third condition is not satisfied, the fourth lighting control means controls the switch so that the first and second backlights are not lit.
An information processing apparatus characterized by that.

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