JP2000075804A - Monitor display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a monitor display device which embodies the reduction of the thickness and low electric power consumption of the device and is conve nient for carrying. SOLUTION: A chargeable battery 24 is built as a power source of a system including at least a signal control circuit for processing the display information signal from a signal transmission source into the monitor display device 10 which receives the display information signal from the prescribed signal transmission source and is capable of displaying the display information on a display screen. A charge for charging the battery is further built into the monitor display device 10. A lithium ion polymer battery of a thin type is adopted as the battery. The battery is arranged on a plane parallel with the display screen on the rear surface side with respect to the display surface of the display screen. Further, the luminance of the display screen is controlled according to the power source to be used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitor display device capable of receiving a display information signal from a predetermined signal source and displaying the display information on a display screen.

[0002]

2. Description of the Related Art In recent years, as a monitor display device which is an output destination of an output device such as a personal computer, a TFT type monitor device has been widely used. It receives the display information signal from the signal source and displays it as an image. It is rarely used alone. For this reason, in the past, portability was not emphasized, and most of them were stationary. Was.

[0003]

By the way, with the recent development of portable information terminal equipment, the use of portable monitor display devices has been rapidly expanding. It is desirable that such a monitor display device be lightweight and thin, and be drivable for a long time.

Accordingly, an object of the present invention is to provide a monitor display device that is portable and realizes a thin device and low power consumption.

[0005]

Therefore, a first aspect of the present invention is a monitor display device capable of receiving a display information signal from a predetermined signal source and displaying the display information on a display screen. A rechargeable battery is incorporated as a power supply of a system including a signal control circuit for processing a display information signal from the signal transmission source.

According to a second aspect of the present invention, in the first aspect of the present invention, a charging circuit for charging the battery is provided.

Further, a third invention of the present application is characterized in that, in the first or second invention of the present application, power supply from the charging circuit can be cut off in conjunction with external charging of the battery. It was done.

Further, a fourth invention of the present application is the first to third inventions of the present application, wherein the battery is a lithium ion polymer battery.

Further, in a fifth aspect of the present invention, in the fourth aspect of the present invention, the battery is disposed on a plane parallel to the display screen on the back side of the display surface of the display screen. It is characterized by the following.

Further, according to a sixth aspect of the present invention, in the first aspect of the present invention, a substantially flat device main body having the display screen on one surface is foldably connected to the device main body. A panel-shaped member, wherein the panel-shaped member has a structure for covering the display screen when the panel-shaped member is folded, and the battery is incorporated in the panel-shaped member.

Further, a seventh invention of the present application is the sixth invention of the present application, characterized in that the charging circuit is incorporated in a panel-shaped member.

Further, an eighth invention of the present application is the lighting device for illuminating the display screen according to the first to seventh inventions, and the illumination for controlling the brightness of the display screen according to a power supply used. And control means for the means.

[0013]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Embodiment 1 FIG. FIG. 1 is an explanatory diagram conceptually showing a use state of the monitor display device according to Embodiment 1 of the present invention. The monitor display device 10 is a personal computer (hereinafter, referred to as a PC) that is a signal transmission source.
An analog input terminal 7 (D-Sub15 pin) for receiving an analog input signal output from the PC 59 as an external connection terminal, capable of receiving the display information signal from the display 59 and displaying the display information on the display screen 3. And a DC-IN terminal 9 for receiving power supplied from an external power supply. When the device 10 is used, the analog input terminal 7 is connected to the analog output terminal 58 of the PC 59 at the other end.
The analog RGB input cable 55 connected to the DC-IN terminal 9 is connected to the
An AC / DC converter (that is, an AC adapter) 32 is connected.

The monitor display device 10 has an input signal control circuit 60 for receiving and controlling a display information signal input from the PC 59 via the analog input terminal 7.
The display information signal is output to the display screen 3 after being controlled by the input signal control circuit 60 so as to be suitable for the display screen 3 to be adopted. FIG. 2 is a block diagram showing a configuration of the input signal control circuit 60. This input signal control circuit 60
The analog / digital (A / D) converter converts the analog RGB signal from the PC 59 into a digital RGB signal suitable for the display resolution of the display screen 3 (800 × 600 bits in the present embodiment). 61
And a dot clock reproducing circuit 62 for generating a dot clock synchronized with the horizontal synchronizing signal input from the PC 59 based on the phase of the reference signal, and a horizontal synchronizing signal and a vertical synchronizing signal (hereinafter, HS, respectively) input from the PC 59 , V
S) for determining the polarity of the sync signal polarity.
A resolution discriminator 64 for discriminating the resolution of the input signal from the PC based on the HS, VS and the polarity discrimination result of the HS and VS by the synchronization signal polarity discriminator 63; and a digital RGB from the A / D converter 61. A frame memory 65 for storing signals, a frame memory write control circuit 66 for outputting a control signal such as a write address to the frame memory according to the resolution based on the dot clock by the dot clock reproduction circuit 62, and an oscillator (OSC in FIG. ) 6
7, a frame memory read control circuit 68 for generating a control signal such as a read address based on a signal from the oscillator 67, a line memory 69, a line memory write control circuit 70, and a line memory read control circuit 71. It is composed of

In this embodiment, an SVGA liquid crystal display is adopted as the display screen 3, and a clock of about 30 MHz from the oscillator 67 is used as a reference.
When the GB signal has only the VGA resolution, the reading of the frame memory 65 may be partially overlapped so that the vertical resolution (the number of lines) matches the display screen.

The monitor display device 10 includes a rechargeable battery 2 as a power supply for supplying power required for operation of the system 12 including the input signal control circuit 60 described above.
4 is built in, and the device 10 further has a charging circuit 25 for charging the battery 24 (see FIG. 3). In this embodiment, a lithium ion polymer battery is employed as the battery 24.

FIG. 3 is a block diagram of the monitor display device 10 in which the battery 24 and the charging circuit 25 are built. This monitor display device 10 (shown by a broken line)
Has a power supply circuit 30 (indicated by a dashed line) that includes a battery 24 and a charging circuit 25 and is configured to supply power to the system 12 including the input signal control circuit 60. In the power supply circuit 30, when the AC adapter 32 is connected to the DC-IN terminal 9, the AC power supply 31
Or, first, the power supplied from the AC power supply 31 via the AC adapter 32 is transmitted to the charging circuit 25, and the battery 2
After the battery 4 is charged, the power from the battery 24 is sent.
Further, when the AC adapter 32 cannot be used, as in the case of carrying, the electric power stored in the battery 24 is transmitted to the system 12. The power supply circuit 3
0, when charging the battery 24, first, the charging circuit 2
Current between 5 and P1, and charging circuit 25 to P
The voltage between the two is detected, and the charging circuit 25 initially charges the battery with a constant current based on the detected current value and voltage value, and after the voltage reaches a specified value, the battery uses a constant voltage. To charge. The power supply circuit 30 can also charge the battery 24 during operation of the main body.

In the monitor display device 10 according to this embodiment, when not in use, the battery 24 can be charged using a charger 40 (indicated by a two-dot chain line) separate from the device 10. In order to realize this, the power supply circuit 30 includes a charging circuit changeover switch 28 disposed between the charging circuit 25 and the battery 24, as shown in FIG. The charging circuit changeover switch 28 is connected to the charging circuit 2 in the device 10 according to the use of the separate charger 40.
5, the power supply from the battery 5 and the separate charger 40 and battery 2
4 so as to be electrically connected, whereby the power from the AC power supply 41 is built into the monitor display device 10 via the AC adapter 42 and the charging circuit 45 in the separate charger 40. It is supplied to the battery 24.

As the separate charger 40, it is preferable to employ a charger having a charging circuit 45 built therein which is more efficient than the charging circuit 25 built in the monitor display device 10. The use of the charger 40 allows the battery 24 to be charged in a shorter time than the case where the charging circuit 25 built in the device 10 is used.

The connection between the separate charger 40 and the monitor display device 10 may take various forms. In this embodiment, although not shown, a charging power supply terminal is provided at one end of the monitor display device 10 so as to be exposed. On the other hand, the charger 40 receives the main body of the monitor display device 10. It has a structure, and its receiving portion is provided with a contact pin at a portion corresponding to the charging power terminal on the device 10 side. The device 10 is the charger 4
When set to 0, the charging power supply terminal and the contact pin contact each other, and the charger 40 and the battery 24
Are electrically connected to each other.

As can be seen from the above description, in the monitor display device 10, the power required for the operation of the system 12 (see FIG. 3) is supplied from the AC power supply 31 or the battery 24 after charging. In this case, the brightness of the display screen 3 (see FIG. 1) of the device 10 may be changed according to the power supply used. FIG. 4 shows, as an example of a configuration for realizing this, a configuration in which a luminance control unit including an inverter control unit 16, an inverter 17, and a lamp 18 is added to the configuration of the device 10 described above. In the brightness control means, first, a voltage is detected between the AC adapter 32 and the charging circuit 25 (point P3 in the drawing), and the inverter control unit 16 determines whether the AC voltage is determined based on the detected voltage. Based on the presence or absence of the adapter 32, a mode (AC adapter mode or battery mode) corresponding to each power supply is set. Subsequently, the inverter 17
Based on the mode set in the inverter control unit 16, the DC power (for example, DC 12V) supplied from the power supply in use is converted to high-voltage / high-frequency RF power (for example, 12
0KHz / 650V), and then supply it to the lamp 18. The lamp 18 illuminates the display screen 3 using the electric power supplied as described above.

FIG. 5 is a graph showing a change in the brightness of the display screen when a mode corresponding to each power supply is set by the brightness control means. Lines M1 and M2 in the graph are:
Each relates to an AC adapter mode and a battery mode. As can be seen from this graph, the slope of the straight line M1 is larger than the slope of the straight line M2. In this embodiment, the brightness of the display screen 3 is increased when the AC adapter mode is set in the inverter control unit 16 as compared with the case where the battery mode is set. That is, in the brightness control means,
When the AC adapter 32 is connected to the device 10, A
By making full use of the power supplied from the C power supply 31 via the AC adapter 32 to increase the brightness of the display screen 3, the visibility of the screen 3 is improved. On the other hand, when the battery 24 built in the device 10 is used, the brightness of the display screen 3 is kept to a required amount, and the power consumption of the battery 24 is suppressed. By employing such a brightness control means, it is possible to promote power saving of the monitor display device 10.

Next, the arrangement of each component built in the monitor display device will be described. 6 to 9
The example of arrangement | positioning of each said component is shown below. The monitor display device 10 shown in each figure has a substantially flat device main body 2 having a display screen 3 on one side as a basic structure.
And a panel-shaped member 5 having a size substantially equivalent to the size of the device main body 2. The device main body 2 and the panel-shaped member 5 are connected to each other by two connecting members at an edge on one end side. 6 via a hinge mechanism. With such a structure, the panel-shaped member 5 is foldable with respect to the apparatus main body 2, and when the apparatus 10 is not used, the panel-shaped member 5 is folded with respect to the apparatus main body 2 to display the display screen. Can be covered and protected. On the other hand, when the device 10 is used, the panel-shaped member 5
Is used as a support for the apparatus main body 2.

First, in the example shown in FIG. 6, together with the battery 24 and the charging circuit 25, the signal control circuit 60 is mounted on the same substrate B1.
The substrate B1 is mounted on the upper side, and is disposed parallel to the screen 3 on the back surface side of the display screen 3 with respect to the display surface, and is incorporated in the apparatus main body 2. By adopting such an arrangement, the device main body 2 becomes thinner, and the device 10 can be made thinner. This is more effective when a thin lithium-ion polymer battery is used as the battery 24.

In the example shown in FIG. 7, the substrate B2 on which the battery 24 and the charging circuit 25 are mounted and the substrate B3 on which the signal control circuit 60 is mounted are positioned on the back side of the display screen 3 on the screen 3 side. And is incorporated in the apparatus main body 2. When such an arrangement is adopted, a relatively large-sized battery 24 can be used, and the battery capacity can be increased.

Further, in the example shown in FIG. 8, the substrate B3 on which the signal control circuit 60 is mounted is mounted on the display screen 3
Is arranged parallel to the screen 3 on the back side with respect to the display surface of
A board B2 on which the battery 24 and the charging circuit 25 are mounted is mounted on the panel-shaped member 5 while being mounted on the apparatus main body 2. When such an arrangement is adopted, the weight ratio of the panel-shaped member 5 to the entire apparatus is large, and the center of gravity is located on the panel-shaped member 5 side. When used as a body, the device main body 2 can be held more stably. Further, in this case, similarly to the case of the example shown in FIG. 7, a battery 24 having a relatively large size can be used, and the battery capacity can be increased.

Further, in the example shown in FIG.
The AC adapter 32 is mounted on the same substrate B4 together with the charging circuit 25 and the substrate B4. When such an arrangement is adopted, the center of gravity is located on the panel-like member 5 side, as in the case of the example shown in FIG. 8. Therefore, when the panel-like member 5 is used as a support of the apparatus main body 2, Body 2
Can be held more stably. Further, in this case, since the AC adapter 32 is incorporated in the device 10, the monitor display device 10 can be easily carried without requiring an AC adapter separate from the device 10.

It should be noted that the present invention is not limited to the above-exemplified embodiment, and it is needless to say that various improvements or design changes can be made without departing from the gist of the present invention. For example, in the above-described embodiment, a case where a personal computer is employed as a signal transmission source for transmitting display information received by the monitor display device will be described. However, the present invention is not limited to this. Is a TV, a surveillance camera,
It is also possible to adopt car navigation and the like.

[0029]

According to the first aspect of the present invention, a rechargeable battery is built in as a power supply of a system including a signal control circuit for processing a display information signal from a predetermined signal transmission source, and an AC power supply is used. Since the device can be operated without the necessity, a monitor display device which is more excellent in portability can be realized.

Further, according to the invention of claim 2 of the present application, since a charging circuit for charging the battery is built in, power is supplied from outside (specifically, power is supplied from an AC power supply via an AC adapter). Only) can charge the battery. In this case, the battery can be charged during operation of the device.

Further, according to the third aspect of the present invention, the power supply from the charging circuit can be cut off in conjunction with the external charging of the battery. The battery can be charged efficiently using a separate charger.

Further, according to the invention of claim 4 of the present application, since the battery is a lithium ion polymer battery, the battery itself is thin, and the device can be made thinner.

Further, according to the invention of claim 5 of the present application, the battery is arranged on a plane parallel to the display screen on the back surface side with respect to the display surface of the display screen. Is achieved. Further, depending on the arrangement method, a relatively large-sized battery can be used, and the battery capacity can be increased.

Further, according to the invention of claim 6 of the present application, a substantially flat device main body having the display screen on one side and a panel-like member foldably connected to the device main body are provided. Provided, the panel-shaped member has a structure to cover the display screen when folded, the battery is incorporated in the panel-shaped member, and the center of gravity is located on the panel-shaped member side, when using the device, When the panel-shaped member is used as a support for the apparatus main body, the apparatus main body can be stably held. Further, depending on the arrangement method, a relatively large-sized battery can be used, and the battery capacity can be increased.

Further, according to the invention of claim 7 of the present application, since the charging circuit is incorporated in the panel-like member together with the battery, the weight ratio of the panel-like member to the device is further increased, and When the panel-shaped member is used as a support for the apparatus main body, the apparatus main body can be held more stably.

Further, according to the invention of claim 8 of the present application, there are provided illuminating means for illuminating the display screen, and control means for the illuminating means for controlling the brightness of the display screen according to a power supply used. Therefore, for example, when an AC adapter is connected to the device, the power supplied from the AC power supply via the AC adapter is sufficiently used to increase the brightness of the display screen, thereby improving the visibility of the screen. On the other hand, when the battery built into the device is used, the brightness of the display screen is limited to a necessary amount,
Power consumption of the battery can be suppressed, and power saving of the monitor display device can be promoted.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram conceptually showing a use state of a monitor display device according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a signal control circuit built in the monitor display device.

FIG. 3 is a block diagram of a monitor display device including a battery and a charger.

FIG. 4 is a block diagram of a monitor display device obtained by adding luminance control means to the configuration shown in FIG.

FIG. 5 is a graph showing a change in luminance on a display screen when a mode corresponding to each power supply is set, which is applied to the monitor display device.

FIG. 6 is a first example of an arrangement of components included in the monitor display device.

FIG. 7 is a second example of an arrangement of components included in the monitor display device.

FIG. 8 is a third example of the arrangement of components included in the monitor display device.

FIG. 9 is a fourth example of the arrangement of components included in the monitor display device.

[Explanation of symbols]

2 device body, 3 display screen, 5 panel member, 10 monitor display device, 12 system,
16 inverter control unit, 17 inverter, 18 lamps, 24 batteries, 25 charging circuit, 28 charging circuit changeover switch, 59 PC, 60 signal control circuit

Claims (8)

[Claims] 1. A monitor display device capable of receiving a display information signal from a predetermined signal source and displaying the display information on a display screen, wherein at least the display information signal from the signal source is processed. A monitor display device including a rechargeable battery as a power supply of a system including a signal control circuit. 2. The monitor display device according to claim 1, further comprising a charging circuit for charging the battery. 3. The monitor display device according to claim 1, wherein power supply from the charging circuit can be cut off in conjunction with external charging of the battery. 4. The monitor display device according to claim 1, wherein the battery is a lithium ion polymer battery. 5. The monitor display device according to claim 4, wherein the battery is disposed on a plane parallel to the display screen on a back surface side with respect to a display surface of the display screen. 6. An apparatus body having a substantially flat plate-like shape having the display screen on one side thereof, and a panel-like member foldably connected to the apparatus body, wherein the panel-like member folds the display when folded. The monitor display device according to claim 1, wherein the monitor display device has a structure for covering a screen, and the battery is incorporated in a panel-shaped member. 7. The monitor display device according to claim 6, wherein said charging circuit is incorporated in a panel-shaped member. 8. An illuminating means for illuminating the display screen, and a control means for controlling the illuminating means for controlling the brightness of the display screen in accordance with a power supply to be used. The monitor display device according to any one of the above.