JPH10161116A - Backlight mechanism for liquid crystal display device in information processing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a backlight mechanism for a liquid crystal display device in an information processing equipment with the backlight mechanism capable of holding strength, rigidity of a fixed level or above and further lightening while securing visibility at an operating time. SOLUTION: In the information processing equipment provided with the backlight mechanism interposed with a center frame for providing an equipment main body 3 with strength and rigidity in the inside and performing background lighting of a touch panel/liquid crystal display device 4 the center frame is composed of material having a light transmissive function, and the center frame is provided with the function of a light transmission plate light transmitting the light of the backlight 12 and performing the background lighting to be integrated as the backlight light transmission plate 6 served also as the center frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention illuminates a background of a liquid crystal display (LCD) which is particularly suitable for a portable / portable information processing device (multimedia device) which is required to be small and light. It relates to a backlight mechanism.

[0002]

2. Description of the Related Art In recent years, information processing equipment has rapidly spread to general offices and homes due to the improvement in the processing capacity of CPUs. In particular, the spread of portable and portable information processing equipment has been increasing. There is something remarkable. This type of information processing equipment is characterized by its portability and portability, so miniaturization and weight reduction are the most important points, but at the same time it is robust enough to be easily handled by ordinary people who are not dedicated operators. Is required.

FIGS. 3 and 4 are a perspective view and a sectional view, respectively, showing an example of a conventional portable / portable information processing device. The upper cover of a device main body 23 constituted by connecting a lower cover 21 and an upper cover 22 is shown. A touch panel / liquid crystal display device 24 is provided on the surface on the side of 22, and a guard cover 25 covering the touch panel / liquid crystal display device 24 is provided so as to be openable and closable with respect to the device main body 23. Install the shape center frame 26,
A file device 27 and a control circuit board 28 are provided on the lower cover 21 side with the center frame 26 interposed therebetween, and an input panel 29 is provided on the upper cover 22 side.
A liquid crystal display glass 30, a backlight 31 composed of a cold-cathode tube for background illumination, a light guide plate 32 for guiding light of the backlight 31, and the like are provided.

[0004] The center frame 26 is for ensuring strength and rigidity exceeding a certain level while reducing the size and weight of the information processing equipment.
By adopting the structure having the lower cover 2
1. To compensate for the lack of strength and rigidity due to the use of a thin plastic material for the upper cover 22 and the like, and to increase the strength and rigidity of the entire device, thereby realizing a small and lightweight information processing device. .

[0005] However, with the increase in the number of general users who use information processing equipment, the need for further reduction in size and weight is increasing. Under these circumstances, there is a case in which a backlight mechanism for performing background illumination of the touch panel / liquid crystal display device 24 is omitted, with a focus on miniaturization and weight reduction, but deterioration of visibility is inevitable. On the other hand, in a device having a backlight mechanism, it is indispensable to provide a light guide plate 32 having a certain thickness in order to allow light to pass therethrough to perform background-free lighting without a spot, and an increase in weight is inevitable. There was a problem.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display device having a backlight mechanism for performing background illumination,
It is an object of the present invention to provide a backlight mechanism of a liquid crystal display device in an information processing device which can maintain a certain strength and rigidity at a certain level while ensuring visibility at the time of operation and realize further weight reduction. Another object of the present invention is to provide a backlight for a liquid crystal display device in an information processing apparatus capable of realizing further simplification of mounting of a light emitting device for a backlight, simplification of its structure, and cost reduction while further reducing the weight. To provide a mechanism.

[0007]

In order to solve the above-mentioned problems, a backlight mechanism of a liquid crystal display device in an information processing apparatus according to the present invention is provided with a center frame for providing the strength and rigidity of the main body of the apparatus. In an information processing apparatus including a backlight mechanism for performing background illumination of a liquid crystal display device, the center frame is made of a material having a light guiding function, and the backlight of the backlight is guided to the center frame. It is characterized by having the function of a backlight light guide plate for performing background illumination and being integrated as a center frame and backlight light guide plate. And the center light frame is integrated with the backlight light guide plate that guides the light. Because you are, sufficient strength, while securing the rigidity, the amount corresponding to the weight of the light guide plate can be reduced equipment weight.

The backlight mechanism of the liquid crystal display device in the information processing equipment according to the present invention is the backlight mechanism of the liquid crystal display device in the above information processing equipment, wherein the center frame and the backlight light guide plate are made of an acrylic resin. Or, it is characterized by being composed of a polycarbonate resin, and since the center frame and the backlight light guide plate are composed of an acrylic resin or a polycarbonate resin, necessary strength and rigidity are secured. The function as a light guide plate for guiding the light of the backlight can be achieved at the same time.

Further, according to the backlight mechanism of the liquid crystal display device in the information processing device according to the present invention, in the backlight mechanism of the liquid crystal display device in the information processing device, light is input to the center frame and backlight light guide plate. The light emitting device for the backlight is directly mounted on the control circuit board.Since the light emitting device for the backlight is directly mounted on the control circuit board, a cold cathode tube is used. The weight can be further reduced as compared with the conventional one, and the operation of mounting the backlight can be facilitated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. FIG. 1 is a sectional view showing the structure of a backlight mechanism of a liquid crystal display device in an information processing apparatus according to a first embodiment of the present invention, FIG. 2 is an enlarged view of a main part thereof, and FIG. FIG. 2 is a cross-sectional view illustrating a configuration of a backlight mechanism of the liquid crystal display device in the information processing apparatus according to the embodiment.

In the first embodiment shown in FIGS.
Reference numeral 1 denotes a lower cover, 2 denotes an upper cover, and by combining the two, a thin book-shaped device body 3
Is configured. A touch panel / liquid crystal display device 4 is provided on the surface of the device body 3 on the side of the upper cover 2, and a guard cover 5 covering the touch panel / liquid crystal display device 4 is provided so as to be openable and closable with respect to the device body 3.

A center frame / backlight light guide plate 6 having an H-shaped cross section is provided in the apparatus main body 3. This center frame and backlight light guide plate 6
The main function is to enhance the strength and rigidity, and to provide the function of a backlight light guide plate to this, and to integrate both parts. Therefore, the center frame and backlight light guide plate 6 It is made of a material having sufficient strength and rigidity and having a light guiding function of transmitting light.

Specifically, it can be made of an acrylic resin, a polycarbonate resin, or the like. By using these materials, uniform background illumination can be realized by utilizing light transmittance. On the other hand, a lower cover 1 and an upper cover 2 are attached to the center frame / backlight light guide plate 6, and a file device 7 and a control circuit board 8 are attached to the lower cover 1, and are attached to the upper cover 2. Is provided with an input panel (touch panel) 9, a liquid crystal display glass 10, and the like.

At both ends of the lower surface of the center frame / backlight light guide plate 6, cut-shaped concave portions 11 having inclined surfaces are provided, and the concave portions 11 are made of a cold cathode tube or the like for performing background illumination. A light 12 is provided. The center frame / backlight light guide plate 6 is made of a material having a good light guide property, and the backlight 12 made of a cold cathode tube or the like is provided by devising the arrangement and the shape as described above. As a result, as shown by arrows in FIG. 2, the method of passing light can be controlled, and uniform background illumination can be realized.

According to the first embodiment, the center frame / backlight light guide plate 6 having an H-shaped cross section is provided in the main body 3 of the apparatus, and it is made of a material having light guide properties. Since the frame also has the function of the backlight light guide plate and the two are integrated, there is no need to incorporate a dedicated backlight light guide plate into the device body 3, and the weight of the device is reduced by the weight corresponding to the weight. It is possible to further reduce the thickness and size of the device.

In addition to the above lightening, the background illumination is realized by the backlight mechanism including the backlight 12 and the center frame / backlight light guide plate 6, so that it is visually recognized during operation. In addition, the center frame and backlight light guide plate 6 made of a high-strength resin such as an acrylic resin or a polycarbonate resin can reliably maintain a certain strength and rigidity.

In the first embodiment, the recesses 11 are provided at both ends of the lower surface of the center frame / backlight light guide plate 6.
And a cold cathode tube for the backlight 12 is disposed in the recess 11. By integrating the center frame and the backlight light guide plate together, the structure shown in FIG.
As shown in the second embodiment, a light emitting device 13 for a backlight for inputting light to the center frame and backlight light guide plate 6 can be directly mounted on the control circuit board 8.

In this case, as the light emitting device 13, a multicolor light emitting diode (LED) or other light emitting device can be used, and by mounting it directly on the control circuit board 8, the center frame and the light emitting device can be used. Cut portion 14 provided on the lower surface of backlight light guide plate 6
, And the desired background illumination can be performed.

Thus, according to the second embodiment,
Since the light-emitting device 13 such as a light-emitting diode (LED) can be directly mounted on the control circuit board 8, the mounting operation is simplified, the mounting structure is simplified, and inexpensive equipment is used, as compared with a device using a cold cathode tube. Can be provided. In particular, in the case of a cold cathode tube, it is necessary to carefully mount the cold cathode tube in a device because it is easily broken by a glass tube. In this case, it is necessary to mount the light emitting device 13 on the control circuit board 8 and incorporate it. Therefore, the mounting workability can be improved.

Further, by using a light emitting device 13 such as a light emitting diode (LED), the weight can be further reduced as compared with a device using a cold cathode tube.
By combining the function of the backlight light guide plate with the center frame and integrating the two, a further reduction in weight can be realized.

[0021]

As described above, according to the backlight mechanism of the liquid crystal display device in the information processing apparatus according to the present invention, the center frame is provided with a light guide function, and both are used as the center frame and the backlight light guide plate. Because it is integrated, the backlight mechanism provides background illumination, ensuring visibility during operation, and at the same time, the center frame and backlight light guide plate ensure sufficient strength and rigidity, while being equivalent to the weight of the light guide plate. Accordingly, the weight of the device can be reduced, and further reduction in size and weight can be realized.

In addition, since the center frame has the function of a light guide plate and is integrated with the center frame, it is possible to adopt a configuration in which a light emitting device for a backlight is directly mounted on a control circuit board. As compared with a device using a cold cathode tube, the weight can be further reduced, the mounting work of the backlight can be simplified, the mounting structure can be simplified, and the cost of the device can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a backlight mechanism of a liquid crystal display device in an information processing apparatus according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a main part showing a configuration of a backlight mechanism of the liquid crystal display device in the information processing apparatus according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view illustrating a configuration of a backlight mechanism of a liquid crystal display device in an information processing device according to a second embodiment of the present invention.

FIG. 4 is a perspective view showing an external configuration of a conventional portable / portable information processing device.

FIG. 5 is a cross-sectional view illustrating a configuration of a conventional portable / portable information processing device.

[Explanation of symbols]

 Reference Signs List 3 device body 4 touch panel / liquid crystal display device 6 center frame and backlight light guide plate 8 control circuit board 12 backlight 13 light emitting device

Claims (3)

[Claims] 1. An information processing apparatus comprising: a center frame for providing strength and rigidity of a device main body therein; and a backlight mechanism for performing background illumination of a liquid crystal display device, wherein the center frame has a light guiding function. The center frame has the function of a backlight light guide plate for guiding the light of the backlight to perform background illumination, and is integrated as a center frame and a backlight light guide plate. The backlight mechanism of the liquid crystal display device in the information processing equipment. 2. A backlight mechanism for a liquid crystal display device in an information processing apparatus according to claim 1, wherein said center frame and backlight light guide plate is made of an acrylic resin or a polycarbonate resin. 3. The information processing device according to claim 1, wherein the backlight light emitting device for inputting light to the center frame / backlight light guide plate is directly mounted on a control circuit board. Backlight mechanism of liquid crystal display device in equipment.