JPH0950030A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device which is suitable for carrying and has an improved assembling characteristic by increasing the ratio at which an image display part occupies in the liquid crystal display device. SOLUTION: This device is constituted to be disposed with a liquid crystal panel 20, a light adjusting member 30 and an illumination device 40 in this order. In such a case, a frame 10 has a supporting part 11 extended to a liquid crystal panel arranging part from the side part 13 of this frame. The frame 10 has a frame tongue part 13 extended to the liquid crystal panel arranging part from the side part of the frame. A light source member 41 is constituted to have light source housing tongue parts 42 at least at one point so as to hold or engage the frame tongue part 12. As a result, the size at least at one point of the four sides of the outer peripheral part of the partition of the frame 10 may be set approximately at the same size as the liquid crystal panel side and, therefore, the frame 10 is formable to a smaller size and the liquid crystal display device of a small size suitable for carrying is obtd. There is an effect of reducing the product cost by lessening the screwing of the light source housing member 41 and diffusing members.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device capable of viewing a liquid crystal display image by utilizing external light from a light source outside the liquid crystal display device as seen in sunlight or indoor fluorescent lamps. Alternatively, the present invention relates to a liquid crystal display device in which a light source such as a fluorescent tube is provided in the liquid crystal display device so that a liquid crystal image can be viewed.

In recent years, many devices such as portable liquid crystal televisions, portable information tools, car navigations, and video monitors have been put on the market as display devices that take advantage of the thinness and lightness of liquid crystal panels. For such small mobile devices,
As a side of using a portable device, it is desired that the price is cheap, light and thin, and the screen for displaying information is large and easy to see. On the other hand, the manufacturer wants to be a product that the customer wants, because it is easy to assemble, maintenance such as repair is easy, parts cost is low. The present invention relates to a liquid crystal display device in which a frame has a frame body closer to an image display size (referred to as a close-up) of a liquid crystal panel, but the screen is large and easy to see, and the assembling and maintenance work is easy.

[0003]

2. Description of the Related Art As a conventional liquid crystal display device, a liquid crystal display device with a built-in lighting device, in which a lighting device having a light source such as a fluorescent tube is built in the liquid crystal display device, a reflection member using external light, for example, is provided below a liquid crystal panel. A reflection type liquid crystal display device in which external light that has been arranged and has passed through the liquid crystal is reflected by the reflection member so that the viewer can see the image, or a liquid crystal in which a lighting device built-in type liquid crystal display device and a reflection type liquid crystal display device are combined There is also a display device.
The present application can be applied to any of the liquid crystal display devices described above, and the effects are the same. Therefore, in the following description, the prior art and the present application will be described using a liquid crystal display device with a built-in lighting device.

In the conventional liquid crystal display device with a built-in lighting device, a liquid crystal panel, a prism sheet, and a prism sheet are provided from a parting side in a frame body having a parting part which is a range in which a viewer can see the screen of the liquid crystal display device. A light adjusting member such as a lens sheet, a light diffusing member (diffusing member), a light guiding member, a fluorescent tube, a lamp, a light emitting diode or a light source by electroluminescence,
The liquid crystal display device is configured by appropriately combining the respective members in accordance with the configuration of the liquid crystal display device whose purpose is a reflecting member that reflects light to the parting side. In recent years, an edge light liquid crystal display device is provided in which the above-mentioned members are arranged in the above-mentioned order as seen in a notebook computer, and a light source is arranged on a side portion of the light guide member (when the parting portion is above). Although there are many liquid crystal display devices on the market, in the following description, a liquid crystal display device using a direct type illumination device in which a light source is arranged below a liquid crystal panel will be described as an example.

Conventionally, the entire liquid crystal display device is disclosed in Japanese Utility Model Publication No. 2-78926 and Japanese Utility Model Publication No. 6-47929. The principal parts of the two prior art publications are shown in FIGS. 4, 5, and 6, which are views of the prior art of the present application. FIG. 4 is a cross-sectional view of a conventional liquid crystal display device, and FIG. 5 is a perspective view showing main internal members of another conventional liquid crystal display device. Figure 6
FIG. 6 is a sectional view of an essential part after FIG. 5 is incorporated in a liquid crystal display device. In FIG. 4, a windshield 190 is disposed on the frame 110 so as to cover the parting portion, and a liquid crystal panel 120 is disposed behind the parting portion so as to be supported by the frame 110. A panel circuit board 124 is arranged at 120. The support member 111 projects from the frame cover member 170 behind the panel circuit board 124, and is arranged outside the peripheral portion of the liquid crystal panel 120. Liquid crystal panel 120
The diffusion member 131 below the support member 111 and inside the support member 111.
Is arranged. Further, a light source 150 and a reflection member 143 are arranged inside the support member 111 behind the diffusion member 131 so as to surround the light source 150. Further, a shield member 162 is arranged so as to cover the entire inside of the frame. A frame body lid member 170 is arranged outside the shield member, and the frame body 1
The liquid crystal display device is obtained by combining 10 and the frame cover member 170. In FIG. 4, a support member 111 is provided on the side of the parting portion of the frame 110 to support the lighting device including the liquid crystal panel 120, the light source 150, and the reflecting member 143.

In FIG. 5, a U-shaped fluorescent tube is used as the light source 250, and a light source accommodating member 241 which also serves as a reflecting member of the light source is used for the reflecting member 143 of FIG. A U-shaped fluorescent tube is housed in the light source housing member 241. U
The two ends of the U-shaped fluorescent tube are rearwardly provided with the light source storage member 241.
The light source storage member 241 and the support substrate 245 sandwich the light source storage member 241 and the support substrate 245. Therefore, the support substrate 245 is the light source storage member 241.
It is sandwiched between the substrate receiving portion 246 and the U-shaped fluorescent tube. The illumination device 240 is configured as described above. Above the lighting device 240, the light collecting member 23
A diffusion member 231 having a storage portion 232 for storing 5 is arranged. A convex portion 233 and a hole portion 234 are arranged around the storage portion 232 of the diffusion member 231, and the light collecting member 235 stored in the storage portion 232 is stored in the storage portion 232 and the convex portion 233.
It is sandwiched by and. The liquid crystal panel 220 is disposed above the light collection member 235 and above the diffusion member 231.

In FIG. 6, which is a sectional view of an essential part of the liquid crystal display device after FIG. 5 is incorporated into the liquid crystal display device, a frame body 110 is provided.
A windshield 190 is disposed on the parting portion of the panel, and a concave portion or a convex portion that supports the liquid crystal panel 220 is disposed on the frame 110 below the portion, and the liquid crystal panel 220 is provided on the concave portion or the convex portion. Is provided. Liquid crystal panel 22
Below 0, a diffusing member 231 having a light collecting member 235 accommodated in the accommodating portion 232 and sandwiched by the convex portions 233 is arranged. The illumination device 240 shown in FIG. 5 is disposed below the diffusion member 231. Although not shown, a circuit using TAB or COG for driving the liquid crystal display device is further provided in the liquid crystal panel. Further, in the liquid crystal television, a receiving circuit and a control circuit are arranged behind and on the side of the lighting device 240.

[0008]

In the liquid crystal display device having the above-described structure, the supporting member 111 is disposed on the side or the periphery of the liquid crystal panel 120 as shown in FIG. It was necessary to dispose the frame 110, which was larger than the disposition dimension of the support member disposed on the outside of the panel, around the frame. For this reason, there is a problem in that the parting size for viewing the image on the liquid crystal panel is smaller than the overall size of the liquid crystal display device, and the viewer is given an image with poor visibility. Further, there is a limit to downsizing of the liquid crystal display device, which cannot be downsized to the size of the liquid crystal panel. Similarly, in FIGS. 5 and 6 which are other embodiments of the prior art, as shown in the cross-sectional view of FIG. 6, a stop hole 247 provided in the light source housing member 241 of the lighting device 240 is provided. Since the fixing hole 239 arranged in the diffusion member 231 and the supporting member 211 formed in the frame body 110 are screwed to each other, the supporting member 211 arranged in the frame body 110 is sized as a liquid crystal panel. It is necessary to make the size larger, and therefore, there is a problem in that the parting size for viewing the image of the liquid crystal panel becomes smaller than the overall size of the liquid crystal display device, and the viewer is given an image with poor visibility. Further, there is a limit to downsizing of the liquid crystal display device, which cannot be downsized to the size of the liquid crystal panel. As described above, as shown in the sectional view of FIG. 6, the lighting device 240 and the diffusion member 231 are configured to be screwed to the support member 211 formed on the frame 110, and are not shown. Although there is no screwing, it was necessary to take steps for screwing and unscrewing because it had a structure of screwing in four directions in order to obtain reliability in a portable use state.

[0009]

The gist of the present invention for solving the above-mentioned problems is to provide a lighting device having a light source, a light adjusting member for adjusting the light from the light source, and a liquid crystal panel for displaying characters and images. In a liquid crystal display device having a frame body, in which a liquid crystal panel, a light adjusting member, and an illuminating device are arranged in this order from the frame body parting side arranged in the frame body, the side of the frame body It is characterized in that a support portion extending from the portion to the liquid crystal panel arrangement portion is arranged. The gist of the present invention to solve the above problems is to provide a lighting device having a light source, a light adjusting member for adjusting the light from the light source, a liquid crystal panel for displaying characters and images, and a frame, and the frame In a liquid crystal display device having a structure in which a liquid crystal panel, a light adjusting member, and a lighting device are sequentially arranged from the side of the frame parting portion arranged in the above, extending from the side of the frame to the liquid crystal panel arrangement part. At least one of the light adjusting member and the illuminating device is supported by the frame by the supporting portion. Further, a lighting device having a light source, a light adjusting member for adjusting the light from the light source, a liquid crystal panel for displaying characters and images, a frame body, a circuit member, and a frame body lid member,
In a liquid crystal display device having a configuration in which a liquid crystal panel, a light adjusting member, and an illuminating device are sequentially arranged from the side of the frame body parting portion arranged in the frame body, a liquid crystal panel disposing portion from the side portion of the frame body. At least one of the light adjusting member, the illuminating device, the circuit member, and the frame cover member is supported by the frame by the support portion extended to the frame. Further, a light source and a lighting device having a light source housing member that houses the light source and reflects the light of the light source to the liquid crystal panel side, a light adjusting member that adjusts the light from the light source, and a liquid crystal that displays characters and images. A liquid crystal display device having a panel and a frame body, in which a liquid crystal panel, a light adjusting member and an illuminating device are arranged in this order from the side of the frame body parting portion arranged in the frame body, Has a frame tongue extending from the side of the frame to the liquid crystal panel arrangement portion, and the light source storage member has at least one tongue of the light source storage member so as to sandwich or engage the frame tongue. It is characterized in that it has a configuration having. Further, a light source and a lighting device having a light source housing member that houses the light source and reflects the light of the light source to the liquid crystal panel side, a light adjusting member that adjusts the light from the light source, and a liquid crystal that displays characters and images. A liquid crystal display device having a panel and a frame body, in which a liquid crystal panel, a light adjusting member and an illuminating device are arranged in this order from the side of the frame body parting portion arranged in the frame body, Has a support portion extending from the side portion of the frame body to the liquid crystal panel placement portion, and the frame body has a frame body tongue portion extending from the frame body side portion to the liquid crystal panel placement portion. The light source storage member is configured to have a light source storage member tongue at at least one position so as to sandwich or engage the frame tongue.

[0010]

Since the supporting portion extending from the side portion of the frame body to the liquid crystal panel arranging portion supports at least one of the light adjusting member, the illuminating device and the frame body lid member on the frame body, It is not necessary to make the supporting portion arranged on the body larger than the size of the liquid crystal panel, so that the parting size for viewing the image of the liquid crystal panel can be made larger than the overall size of the liquid crystal display device.

Further, the frame has a frame tongue extending from the side of the frame to the liquid crystal panel arrangement portion, and the light source storage member has a tongue of the light source storage member so as to sandwich or engage the frame tongue. Since the liquid crystal display device is provided in at least one place, it is possible to obtain a liquid crystal display device which has reliability in a portable use state while reducing the screwing of the light source storage member and the diffusion member.

[0012]

EXAMPLES Examples of the present invention will be described below. 1 is an external perspective view of a main part of a liquid crystal display device according to the present invention when disassembled, FIG. 2 is an external perspective view of the main part of a liquid crystal display device according to an embodiment of the present invention, and FIG. FIG. 3 is a cross-sectional view of a main part of a liquid crystal display device that is an embodiment of the invention. In the description, the vertical and horizontal relationship of the member arrangement will be described with reference to the drawings. In FIG. 1, a box-shaped frame body 10 is provided with a frame body parting portion 15 for observing an image displayed on a liquid crystal, and a width A is provided around the frame body parting portion 15. A panel receiving portion 14 having a width B is arranged. A frame body tongue portion 12 is projecting in a tongue shape from a portion of the side portion 13 of the panel receiving portion 14 toward the frame body parting portion 15 inside the frame body. Further, on the side portion 13 of the frame body 10, the frame body cover member 7 shown in FIG.
0 and the frame 10 are supported by screws 1 for engaging with each other.
1 is provided. Support 11 as shown
Is not projected from the panel receiving part, and the panel receiving part 1
It is molded from the side of the frame body 10 together with the reinforcing ribs in a state of being lifted from 3. Therefore, the lower portion of the support portion 11 becomes a space that can be effectively used. To dispose the liquid crystal panel 20 on the panel receiving portion 14 inside the frame body 10,
The liquid crystal panel 20 so that it can be inserted into the lower part of the support portion 11 as well.
To arrange. That is, it is possible to provide the side portion 13 of the frame body 10 that substantially matches the outer dimensions of the liquid crystal panel 20. Therefore, it is necessary to provide the liquid crystal panel 20 with the illumination light that is in the pixel area of the liquid crystal panel 20, and the width C of the light storage member 41 of the illumination device 40 is narrowed. The liquid crystal panel 20 includes an upper transparent substrate 22 on which an IC 23, which is an IC for a liquid crystal driving circuit, is COG-mounted, and an IC 23, which is an IC for driving a liquid crystal, is a COG.
The liquid crystal is sandwiched between the mounted lower transparent substrate 21 and the periphery of the liquid crystal is sealed at least. Further, the liquid crystal panel 20 includes a flexible circuit board (hereinafter, FP
The FPC 24 of C) is anisotropically conductively bonded. A light adjusting member 30 is disposed inside the frame body 10 and above the liquid crystal panel 20. Although FIG. 1 shows an example in which a diffusing member is provided as the light adjusting member 30, the light adjusting member 30 is composed of the diffusing member 31 shown in FIG. 2 and a light collecting member 35 such as a prism sheet or a microlens sheet. It may be arranged later on the frame body 10 of FIG. A lighting device 40 is provided inside the frame 10 and above the light adjusting member 30.

The illuminating device 40 of the present invention will be described with reference to FIGS. 1 and 2. The illuminating device 40 includes a light source housing member 41, a light source 50 disposed in a reflecting portion 43 of the light source housing member 41, and an end of the light source 50. The temperature fuse 49 and the support substrate that partially supports the portion together with the illumination end receiving portion 44 and has an illumination circuit form a basic configuration. The light source housing member 41 is a reflection part 4 that reflects the light of the light source 50 using a U-shaped fluorescent tube to the liquid crystal panel 20 side.
3, an illumination source end receiving portion 44 for accommodating the end portion of the light source 50 accommodated in the reflecting portion 43, and a liquid crystal display device protected from an abnormal temperature rise of the light source 50 accommodated in the illumination source end receiving portion 44. The notch 45 for contacting the temperature fuse 49 and the light source, the barbed portion 46 for supporting the support substrate 48 from the light adjusting member 30 side, and the frame body tongue 12 arranged on the frame body 10 are engaged. Light source storage member tongue portion 42, and a stop hole 47 provided at a side portion of the light source storage member 41 opposite to the light source storage member tongue portion 42. .

FIG. 1 focusing on the sectional view of the embodiment of the present invention in FIG.
The assembly method will be described with reference to FIGS. 2 and 3. In FIG. 3, ribs are provided on the panel receiving portion 14 on the side of the frame parting portion 15 of the frame body 10 to form a structure for receiving the outside of the parting of the liquid crystal panel 20.
It has a structure that does not scratch the parting. Further, the liquid crystal panel 20 is arranged on the rib of the panel receiving portion 14 so as to be inserted below the supporting portion 11 in FIG. The movement of the liquid crystal panel 20 arranged in the frame body 10 in the left-right direction is performed by the panel receiving portion 14.
The movement is suppressed by the ribs arranged on the side frame body 10. The light adjusting member 30 shown in FIG. 2 is inserted into the frame body 10 from above the liquid crystal panel 20 arranged in the frame body 10 in the same manner as when the liquid crystal panel 20 is assembled. Incorporate. The frame tongue 12 of the frame 10 is
As if sandwiched by the tongue 42 of the light source storage member at a certain position,
The lighting device 40 so that the light comes to the light adjusting member 30 side.
Build in 0. Although not shown in FIG.
And the light source accommodating member 4 shown in FIG.
A screw is inserted from above the light source accommodating member 41 so as to penetrate through the first fixing hole 47, and is screwed to the screw receiving portion arranged in the frame body 10. In FIG. 3, a circuit member 60 in which a control circuit or a receiving circuit of a liquid crystal display device, an illumination driving circuit, or the like is mounted on a substrate such as a glass epoxy substrate is arranged above the lighting device 40 supported by the frame body 10. The circuit member 60 is screwed to the screw receiving portion provided in the light source storage member 41. The circuit member 60 is covered with a shield plate 62 because electromagnetic noise is generated or interfered by the electromagnetic noise depending on the contents of the circuit to be mounted. The frame lid member 70 is arranged from above the circuit member, and the frame lid member 70 and the supporting portion 11 of the frame body 10 are screwed to complete the liquid crystal display device. In the above description, the configuration in which the frame lid member 70 is supported by the support portion 11 has been described. However, the frame lid member 70, the lighting device 40, or the light adjusting member 30 may be individually supported by the support portion 11 or may be supported in combination. However, the effect of the present application can be obtained.

[0015]

According to the liquid crystal display device of the present invention, since the light adjusting member and the illuminating device are supported on the frame body by the supporting portion extending from the side portion of the frame body to the liquid crystal panel disposing portion,
Since the size of at least one of the four sides of the parting outer circumference of the frame, which is the size of width A and width B in FIG. 1, can be made substantially the same as the size of the liquid crystal panel, the size of the frame can be reduced. ,
There is an effect that it is possible to obtain a liquid crystal display device that is compact and portable. Further, since the parting size for viewing the image of the liquid crystal panel is larger than the size of the peripheral portion of the screen of the liquid crystal display device, it has the effect of giving the user the image of a large screen for the size of the liquid crystal display device. . When a frame having the same size as the conventional one is used, a liquid crystal panel having a screen larger than the conventional one can be incorporated in the present invention, so that the effect of improving the visibility of the image can be obtained.

Further, the frame has a frame tongue extending from the side of the frame to the liquid crystal panel arrangement portion, and the light source storage member has a tongue of the light source storage member so as to sandwich or engage the frame tongue. The liquid crystal display device having the reliability of being used in a portable state can be obtained in addition to the effect of reducing the screwing of the light source storage member and the diffusion member and reducing the product price, because the liquid crystal display device is configured to have at least one place.

[Brief description of drawings]

FIG. 1 is an external perspective view of a main part when a liquid crystal display device according to the present invention is disassembled.

FIG. 2 is a perspective view of a main part of a liquid crystal display device that is an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a main part of a liquid crystal display device that is an embodiment of the present invention.

FIG. 4 is a sectional view of a conventional liquid crystal display device.

FIG. 5 is a perspective view showing main members inside an other conventional liquid crystal display device.

6 is a cross-sectional view of an essential part after the member of FIG. 5 is incorporated in a liquid crystal display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Frame 11 Support part 12 Frame tongue 13 Side part 14 Panel receiving part 15 Frame parting part 20 Liquid crystal panel 30 Light adjusting member 31 Diffusing member 35 Light collecting member 39, 47 Stop hole 40 Illuminating device 41 Light source accommodating member 42 Light source storage member Tongue portion 43 Reflection portion 44 Illumination source end receiving portion 46 Girder portion 48 Support substrate 50 Light source 60 Circuit member 62 Shield plate 70 Frame lid member

Claims (5)

[Claims] 1. A frame body having at least a lighting device having a light source, a light adjusting member for adjusting light from the light source, a liquid crystal panel for displaying characters and images, and a frame body, the frame body being disposed in the frame body. In a liquid crystal display device having a structure in which a liquid crystal panel, a light adjusting member, and a lighting device are sequentially arranged from the parting portion side, a supporting portion extending from the side portion of the frame body to the liquid crystal panel arrangement portion is arranged. A liquid crystal display device having the above configuration. 2. A frame body having at least a lighting device having a light source, a light adjusting member for adjusting light from the light source, a liquid crystal panel for displaying characters and images, and a frame body, the frame body being disposed in the frame body. In a liquid crystal display device having a configuration in which a liquid crystal panel, a light adjusting member, and an illuminating device are arranged in this order from the parting portion side, the light is transmitted by a supporting portion extending from the side portion of the frame body to the liquid crystal panel arrangement portion. A liquid crystal display device, wherein at least one of an adjusting member and the illuminating device is supported by the frame body. 3. A lighting device having at least a light source, a light adjusting member for adjusting light from the light source, a liquid crystal panel for displaying characters and images, a frame body, a circuit member, and a frame body lid member, and the frame. In a liquid crystal display device having a structure in which a liquid crystal panel, a light adjusting member, and a lighting device are sequentially arranged from the side of the frame body parting portion arranged on the body, the liquid crystal panel extends from the side portion of the frame body to the liquid crystal panel arrangement portion. A liquid crystal display device, wherein at least one of the light adjusting member, the illuminating device, the circuit member, and the frame body cover member is supported by the frame body by the support portion that is made to extend. 4. A lighting device having at least a light source and a light source housing member that houses the light source and reflects the light of the light source to the liquid crystal panel side, a light adjusting member for adjusting the light from the light source, a character, and the like. In a liquid crystal display device having a liquid crystal panel for displaying an image and a frame, and a structure in which a liquid crystal panel, a light adjusting member, and an illuminating device are arranged in this order from the side of the frame parting part disposed in the frame. The frame body has a frame body tongue extending from the frame side portion to the liquid crystal panel arrangement portion, and the light source storage member has a tongue portion for sandwiching or engaging the frame body tongue. A liquid crystal display device, characterized in that it has a structure having at least one part. 5. A lighting device having at least a light source and a light source housing member that houses the light source and reflects the light of the light source to the liquid crystal panel side, a light adjusting member that adjusts the light from the light source, a letter, and the like. In a liquid crystal display device having a liquid crystal panel for displaying an image and a frame, and a structure in which a liquid crystal panel, a light adjusting member, and an illuminating device are arranged in this order from the side of the frame parting part disposed in the frame. The frame body has a supporting portion extending from the side portion of the frame body to the liquid crystal panel disposing portion, and the frame body has a frame body extending from the frame body side portion to the liquid crystal panel disposing portion. A liquid crystal display device, comprising: a tongue portion, and the light source housing member having at least one tongue portion for the light source housing member so as to sandwich or engage the frame body tongue portion.