JP3366070B2 - Information processing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LCD display device or an information processing device having the LCD display device,
In particular, the present invention relates to a display device or a notebook-type or laptop-type information processing device having a configuration for preventing glass breakage of an LCD even if the information processing device body is accidentally dropped.

[0002]

2. Description of the Related Art Conventionally, an LCD (Liqued
An information processing apparatus shown in FIG. 2 using a Crystal Display) is known. Conventionally, in the glass breakage prevention structure of the LCD, in order to prevent the breakage of the LCD glass 15, two presser fittings 22 are provided on the long side of the glass 15 so that the presser fittings 22 are provided.
A soft rubber (not shown) is laid between the glass and the surface of the glass 15, and the pressing metal fitting 22 is fixed with a screw 23.

[0003]

However, in this structure, there is no metal fitting on the short side, and since the soft material for shock absorption is not provided under the glass 15, the electrode on the short side is not provided. At the contact portion of the glass 15 surface, there is a risk that the glass 15 may be cracked by the impact when dropped or the compressive load when the main body or the display surface is pressed. If the glass 15 is broken, the function of the LCD itself is lost, and the display becomes impossible, and the function of the information processing device is lost. If the glass breaks, the customer must replace the entire LCD unit, forcing a great deal of expense.

The notebook type information processing apparatus is often carried, and there is a danger of falling especially when carrying or moving from a desk. Considering that the position of the information processing device or the height of the desk top when carried by a person is about 70 cm, the performance of the information processing device is that the LCD unit does not break even if dropped from a height of about 70 cm. It is necessary to maintain the performance.

FIG. 9 shows the state of glass breakage in the conventional LCD unit. This is when dropped from the height of 40 cm to the concrete floor with the lower surface of the main body facing down,
A crack is generated from the vicinity of the IC carrier 14 that includes or carries a drive IC that drives the LCD by being distributed around the LCD glass. According to experiments, it is easier to break the glass when the main body is dropped horizontally relative to the floor than when it is dropped vertically. This is glass 15 when dropped horizontally.
This is because the support part of becomes a fulcrum and acts as a moment. According to our experiments, it has been confirmed that the “crack” occurs from the outer peripheral portion of the glass laminate, especially from the corner portion.

The load at which the glass breaks can be calculated by mounting the acceleration sensor on the glass surface and measuring the acceleration on the glass surface when the main body of the information processing apparatus is dropped horizontally.

FIG. 10 is a diagram showing the relationship between the acceleration (unit: m / s ² ) on the glass surface of the LCD and the drop height (unit: cm) of the main body. According to this, the conventional product has a drop height of 40
The acceleration is about 726 m / s ^{2 in} cm. Therefore,
When the impact load is calculated from the weight of the glass of about 170 g, the load applied to the surface of the glass reaches 117 N.
In addition, the location of the glass breakage was determined by experiments and CAE (Compute
Comprehensive analysis such as r Aided Engineering)
Glass and electrode adhesion part, that is, glass breakage occurs due to local concentrated load generated near the support part of the glass surface,
It was found that the maximum stress at that time was about 159 × 10 ⁶ [N / m ² ].

The present invention has been made in view of the above problems, and an object of the present invention is to prevent glass breakage of the LCD unit even when the main body of the notebook type information processing device (word processor) is accidentally dropped and to prevent a drop impact of the main body. The purpose is to provide customers with a notebook information processing device that is resistant to drops by increasing the impact strength against such as about twice the current level. In the case of a notebook type information processing device, the main body size is only a thin file and it is easy to carry, so dropping it when carrying it or moving it from a desk is a major information processing device such as a business machine. Compared to them, they are very many. Considering the height of the desk and the height of the drop that people carry around,
If the structure is such that the LCD glass does not break even at a height of about 70 cm, it will be practically acceptable even if the customer accidentally drops it.

The present invention provides an LC for the above-mentioned drop.
It is to prevent glass breakage of D and provide a highly reliable display device or information processing device.

[0010]

Means for Solving the Problems] The object is achieved by a main body case provided with the keyboard and the control board, a liquid crystal display device which is rotatably attached to the body case, and the upper glass Re et al provided in the liquid crystal display device Two pieces of lower glass
An LCD glass made of glass, an upper frame and a lower frame made of a metal member sandwiching the LCD glass , and an upper frame and a lower frame made of the metal member.
With a mold frame held by the lower frame between
The diameter of the lower glass is larger than that of the upper glass, and
The upper glass and the lower glass are in direct contact, and the upper glass is
A first soft member between the upper frame and the lower frame, and the lower glass
Between the entire lower surface of the large diameter part of the
And a width of the first and second soft members.
Note that it is configured to protrude beyond the outer diameter of the LCD glass, and the L
This is achieved by configuring the first and second soft members protruding from the peripheral edge of the CD glass so as to protect the end portion of the glass from impact.

[0011]

The soft member acts so as to absorb the impact force due to the drop or the momentary pressing force of the main body. In particular, the soft member is not laminated and acts to absorb the impact applied to the upper and lower surfaces of the large diameter portion of the weakest lower glass, so that the glass laminated body is largely prevented from being damaged by being dropped.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of one embodiment of the present invention and its operation and effects will be described in detail below. First, an outline of the notebook information processing device will be described with reference to FIG. FIG. 3 is a perspective view of the information processing device with the liquid crystal display device opened. In the figure, reference numeral 1 is a liquid crystal display device equipped with an LCD unit 5, which is rotatably attached to a rear end portion of a main body case 2 by a hinge. The main body case 2 contains a power supply unit, a microcomputer, a control LSI, an IC, a main control board 3 including a printed wiring, an FDD 4 (floppy disk drive), and the like. Reference numeral 6 denotes a keyboard arranged on the front side of the main body case 2, in which character keys and a key top of the right numeric keypad are projected on the upper surface of the main body case. These keys are used as input keys for documents or graphics or as command keys for printing. Reference numeral 7 is a power switch, and 8 is a printer cable.

The information processing apparatus according to the present invention is configured as described above, and can input and edit a document by pressing the power switch 7 and operating the keyboard 6.
The microcomputer or control LSI processes a signal input by the key with a CPU (Central Processing Unit), creates a character, a character string, or a graphic, and outputs the data to the display device based on these created data. Perform display control. When printing a document or the like, a predetermined print instruction key on the keyboard 6 is pressed to send a command to the CPU, which is mounted on the main control board 3 based on characters or image data stored in a storage device (not shown). An operating signal of a thermal transfer printer (not shown) is created by a control element such as a CPU, etc., which is sent to the printer by the printer cable 8 for printing.

Next, the instruction structure of the LCD unit 5, which is the main structure of the present invention, will be described with reference to FIGS. 1, 4, 5, 6, 7, 8 and 10 and 11. .

FIG. 1 is a perspective view of the LCD unit 5 part. Reference numeral 9 denotes an inverter circuit, which controls the input voltage and current of the cathode fluorescent tube 10 to form a light source of variable brightness. The light from the cathode fluorescent tube is transmitted through the plate-shaped light guide 11
Is supplied to the entire area of the display screen by the diffuser plate (not shown) provided on the light guide 11 to uniformly illuminate each LCD element. A mold frame 12 carries the light guide body 11, the cathode fluorescent tube 10 and the like. The mold frame 12 has a structure in which it is pressed by the lower frame 13 of an aluminum plate. Reference numeral 14 denotes the above-mentioned IC carrier, on which a drive IC or the like is mounted. The glass 15 is composed of two pieces of glass 15a, 1
5b, and liquid crystal is enclosed between these glasses 15a and 15b. Then, the wiring pattern provided around the surface of the glass 15 and the plurality of IC electrodes provided on the IC carrier 14 are bonded, and the LCD is driven by the LCD drive circuit provided in the main body case.
Since the LCD is a field effect element, it is designed so that the wiring pattern of the segment connecting the pixel portions does not cross the electrodes on the counter substrate sandwiching the liquid crystal layer. Reference numeral 16 denotes a soft member such as silicone rubber or plastic, which is arranged on the upper and lower supporting portions of the glass 15 over the entire circumference or intermittently. In the case where the glass is intermittently arranged, the soft member 16 is always arranged at the corner portion of the glass, and a predetermined number is arranged near the IC carrier 14 in the middle of the side. As described above, it has been confirmed that the glass breaks frequently occur near the corners and the IC carrier 14, and in particular, the soft member 16 disposed at the corners effectively acts to prevent the cracks at the corners. .

By thus arranging a plurality of soft members 16 all around or intermittently, the soft member 16 acts as a shock absorbing member even if the information processing apparatus body is dropped from any position, and cracks in the glass 15 are caused. It can be prevented. Further, the soft member 16 is made of a material such as silicone rubber so that it can sufficiently cope with a change in environmental conditions. Reference numeral 17 is an upper frame, and in the case of unitizing, the holding hole 18 of the lower frame 13 and the claw 19 of the upper frame 17 are fixed together. A frame leg 20 is fixed to the boss of the main body case 2 with a screw. Figure 4
[FIG. 3] is a sectional view of an LCD part. The glass 15 is a laminated glass of the upper glass 15a and the lower glass 15b as described above, and the soft member 16a is arranged between the upper glass 15a and the upper frame 17. Here, the soft member 16
Without a, the glass surface is in direct contact with the upper frame 17, and the display device of the information processing device is closed (in this state, the upper frame is at the bottom and the lower frame is at the top), and the LC
In the case of falling with D down, the glass 15 (15
a) directly hits the metal surface of the upper frame 17, and the glass is cracked. At this time, if there is the soft member 16a, the impact at the time of dropping is buffered and glass breakage does not occur. If the lower frame 13 is dropped and dropped, the soft member 16b can similarly prevent the glass 15 from cracking. Since the corner portions of the glass 15 are particularly fragile, at least the soft members 16a and 16b are provided to protect the outer peripheral edges and the corner portions of the upper glass of 15a and the lower glass of 15b.
It is configured to be larger than the large diameter portion of No. 5 to enhance the prevention of breakage of the glass corner portion. As shown in FIG. 11, when the width of the soft member 16 is smaller than the contact surface between the upper frame 17 and the upper glass 15a, the thickness of the soft member 16 is about 0.3 mm, and the parts such as the upper frame 17 due to the impact. By the transformation of
The impact is applied to the corners of the glass 15a, causing glass breakage. Therefore, the width of the soft member 16 needs to be provided so as to be outwardly protruded by about twice the thickness of the soft member 16 than the large diameter portion of the glass 15. 32
Is a light-shielding plate for preventing the light from leaking out of the visual field when the light passes through the light guide 11 and is supplied to the entire visual field by the diffusion plate 21.

FIG. 5 is a sectional view showing an application example of the present invention. First, the soft member 16a is extended to above the IC carrier 14 to prevent the printed wiring or the electrode 31 of the IC carried on the IC carrier 14 from being lifted by an impact. At this time, if the soft member 16a is pressed by the convex portion 17A provided downward on the upper frame 17, the structure becomes simple. Further, according to this structure, the outer peripheral edge of the glass 15a is protected by the inclined portion 16a-1 of the soft member 16a, the radial impact of the glass is relaxed, and the glass breakage prevention effect is enhanced.

Further, the soft member 16b is raised to the outer peripheral surface of the glass 15b and extended to protect the peripheral edge of the tip of the glass 15 so that it does not directly hit in either a horizontal drop or a vertical drop. When the information processing device or the display device is dropped, the upper frame 17 may be bent, and the upper frame 15b may hit the peripheral edge of the upper glass 15b, which damages the upper glass 15b. This is caused by the fact that the soft member 16a does not exist in the peripheral portion of the glass, and this is prevented by the configuration of FIGS. 4, 5 and 6.

The glasses 15a and 15b are provided with liquid crystal elements on the mating surfaces of these two glasses, and electrodes are taken out from these liquid crystal elements to the outer periphery.
As shown in FIG. 5, the glass 15b has a diameter larger than the glass 15a by a predetermined dimension. Then, the electrode 31,
Alternatively, it carries an ordinary printed wiring or lead wire. Based on such a configuration, the present invention has a basic configuration in which a soft member 16a is interposed between the glass 15a and the upper frame 17 and a soft member 16b is interposed between the glass 15b and the lower frame 13. , Glass 15b
The upper and lower surfaces of the large-diameter portion are also elastically supported by the soft members 16a and 16b (see FIG. 5).

Laminated portion of glass 15a and 15b and glass 1
In the large diameter portion of the outer periphery of 5b, the glass 15b that is not laminated
It is confirmed that the large diameter portion of the outer circumference is vulnerable to impact, and that cracks first occur from this large diameter portion of the outer circumference by our experiments. Therefore, in order to improve the impact resistance, how to mitigate the impact applied to the large-diameter outer peripheral portion of the non-laminated glass 15b has been a problem. The present invention invents the structure shown in FIG. 5 that withstands an impact when dropped from a height of 70 cm on a concrete floor by repeating trial and error through experiments and trial production.

In FIG. 6, the soft member 16b is also used as the light shielding plate 32, and the other structure is the same as that of FIG.

The soft members 16a and 16b used in FIGS. 4, 5, and 6 are made of rubber, plastic, or the like, and have a thickness dimension of 0.3 mm or more and Sure hardness Hs30 to Hs.
It is about 70. Thickness of soft member is 0.3mm
If the rubber is less than 70 cm, the flexure of the rubber against the shock cannot be secured against the shock of the drop height of 70 cm, and the glass will be broken. This is because the thickness of the soft member is 0.2mm, 0.1
Confirmed by the free sample which is mm.

It has been confirmed by experiments that when the floor surface is made of lauan wood, the glass is not damaged even if it is dropped from a height of 100 cm.

FIG. 7 shows the upper frame 1 of the LCD unit section 5.
7 is a perspective view in which a rubber member is arranged on the leg of FIG. The figure is an enlargement of one of the four legs. In this configuration, when the soft member cannot be directly placed on the glass surface, the rubber member 25 is provided on the frame leg 20 as shown in the figure, so that the glass 15 is prevented from being broken through the upper frame 17 as in the above-described embodiment. . Reference numeral 27 is a pressing plate for securely fixing the cushioning member 25 made of rubber, and is fixed to the upper case 28 with a screw 26. The thickness of the cushioning member is about 5 mm in total, and the frame leg 20 is sandwiched between the rubber members 25. The impact load is damped by a rubber member of about 2.5 mm on each side, so that the impact is not transmitted to the LCD unit 5. However, the impact against the vertical direction is slightly weaker than that of the above-described configuration in which the glass surface is received by the soft member.

FIG. 8 is a perspective view showing an application example in which the attaching position of the soft member is intermittent. A plurality of soft members 16 are provided at predetermined intervals at the end of the glass 15, and the soft members 16 are always arranged at the corners and the center. This is effective in saving the material of the soft member, but the assembly and manufacturability are slightly inferior due to the plurality of soft materials.

FIG. 10 is a graph comparing the acceleration (G) applied to the glass surface when the information processing apparatus body is dropped between the conventional product and the product of the present invention. The vertical axis represents the acceleration applied to the LCD glass surface, the horizontal axis represents the drop height, and the vertical scale is 1
00 m / s ² , the horizontal axis has a scale of 10 cm. With conventional products, when dropped from a height of 40 cm onto a concrete floor, the glass was impacted with an acceleration of 726 m / s ² , and most of the glass under inspection was damaged. On the other hand, in the case of the product to which the present invention is applied, even when dropped from a height of 70 cm, which is the maximum height that is normally used, the glass is not subjected to an impact of 726 m / s ² in acceleration, and most of the samples are free. The glass did not break. By adopting the present invention,
It can be seen that the glass does not break even when a person drops the information processing device during transportation or from the desk, and the impact resistance is significantly improved.

[0027]

As described above, according to the present invention, a laminated body of an upper glass and a lower glass, a liquid crystal display device enclosed in a mating surface of the upper glass and the lower glass, and a glass laminated body are provided. In a display device having a frame and a lower frame, and an electrode electrically connected to the liquid crystal display element and extended in the circumferential direction of the glass, in a space between the upper glass peripheral portion and the upper frame or between the lower glass peripheral portion and the lower frame. A soft member is interposed in either one of the spaces, the outer diameter of the soft member is made larger than the outer diameter of the glass, and the soft member protruding from the peripheral edge of the glass impacts the end portion of the glass. Since it is configured to protect the display from such a situation, or the display device thus configured is rotatably provided to the information processing device, the floor surface of the concrete is particularly high from a height of 70 cm. It is dropped can be provided an information processing apparatus having a display device or the display device is not damaged.

[Brief description of drawings]

FIG. 1 is a perspective view of an LCD unit portion embodying the present invention.

FIG. 2 is a perspective view of a conventional LCD unit section.

FIG. 3 is a perspective view of a notebook information processing device.

FIG. 4 is a cross-sectional view of an LCD unit showing an embodiment of the present invention.

FIG. 5 is a sectional view showing another embodiment of the present invention.

FIG. 6 is a sectional view showing another embodiment of the present invention (sharing plate and soft member are commonly used).

FIG. 7 is a perspective view showing another embodiment of the present invention (a rubber member is arranged on the frame leg).

FIG. 8 is a perspective view showing a rubber member mounting position according to another embodiment of the present invention.

FIG. 9 is a perspective view showing a state of glass breakage of a conventional LCD unit part.

FIG. 10 is a graph showing the relationship between drop height and acceleration.

FIG. 11 is a cross-sectional view showing breakage of a corner portion of glass when the frame is deformed.

[Explanation of symbols]

1 ... Liquid crystal display device, 2 ... Main body base, 3 ... Main control board, 4 ... FDD, 5 ... LCD unit, 6 ... Keyboard, 7 ... Power switch, 8 ... Printer cable, 9 ... Inverter circuit, 10 ... Cathode fluorescent tube , 11 ... Light guide, 12
... Mold frame, 13 ... Lower frame, 14 ... IC carrier, 15 ... Glass, 15a ... Upper glass, 15b ... Lower glass, 16, 16a, 16b ... Soft member, 16a-1 ...
Inclined portion, 17 ... Upper frame, 17A ... Convex shape, 18 ... Retaining hole, 19 ... Claw, 20 ... Frame leg, 21 ... Diffusion plate, 22
... Presser fittings, 23, 26 ... Screws, 25 ... Rubber member, 27
... Presser plate, 28 ... Upper case, 31 ... Electrode, 32 ... Shading plate.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kiji Koshi               1-1-1, Higashitaga-cho, Hitachi-shi, Ibaraki               Hitachi, Ltd. Information & Video Media               A business division (72) Inventor Yuji Suganuma               1-1-1, Higashitaga-cho, Hitachi-shi, Ibaraki               Hitachi, Ltd. Information & Video Media               A business division (72) Inventor Katsuaki Fukaya               1-1-1, Higashitaga-cho, Hitachi-shi, Ibaraki               Hitachi, Ltd. Living Equipment               Within the department                (56) References JP-A-59-116681 (JP, A)                 JP-A-2-93425 (JP, A)                 JP-A-3-17628 (JP, A)                 Actual Kaihei 5-33126 (JP, U)                 Actual development Sho 60-193527 (JP, U)                 63-173274 (JP, U)                 Special table 5-501456 (JP, A)

Claims (4)

(57) [Claims] 1. A main body case having a keyboard and a control board, and an upper case rotatably attached to the main body case.
A liquid crystal display device Bei, the liquid crystal display device LCD glass made of glass and a lower glass after having provided, an upper frame and a lower frame consisting of a metal member which sandwich the LCD glass, the upper on said frame a frame legs for fixing to the case, the information processing apparatus characterized by sandwiching the sandwich a soft member the frame legs. 2. A main body case equipped with a keyboard and a control board, a liquid crystal display device rotatably attached to the main body case, and an upper glass and a lower glass provided on the liquid crystal display device.
An LCD glass made of a plurality of laminated glasses, an upper frame and a lower frame made of a metal member sandwiching the LCD glass, and a mold frame held by the lower frame between the upper frame and the lower frame made of the metal member are provided. and, the lower glass have a larger diameter than the upper glass, the upper glass and the first soft member between the upper frame, the second between the the total lower surface of the large diameter portion of the lower glass mold frame A flexible member, wherein the widths of the first and second soft members extend beyond the outer diameter of the LCD glass, and the first portion protrudes from the peripheral edge of the LCD glass.
And an information processing device characterized in that the second soft member is configured to protect the end portion of the glass from impact. 3. The information processing apparatus according to claim 1, wherein the soft member is a rubber-based soft member such as silicone rubber and the thickness thereof is set to 0.3 mm or more. 4. The information processing device according to claim 1, wherein the hardness of the soft member is set to Hs30 to Hs70.