JP2001013886A - Display device and electronic apparatus having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a display device in which deterioration and breakage hardly occur in the projecting parts of a display panel and which prevents a misalignment of the display panel. SOLUTION: This display device 10 is formed by fixing the display panel 14 having the projecting part 22 projecting from its end face by means of a fixing frame 30 formed of metal. The fixing frame 30 positions the display panel 14 at a prescribed position within the surface nearly parallel to the frame part 31 of the fixing frame 30 by positioning part 32 and 36 which abut on the end face of the display panel 14 by evading the projecting part 22. The positioning parts 32 come into nearly point-to-point contact with the display panel 14 in the projecting part 34. The projecting parts 34 have a height nearly equal to the height at which the projecting part 22 projects from the end face 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device and an electronic device provided with the same.

[0002]

2. Description of the Related Art Among various display devices, for example, a liquid crystal panel of a liquid crystal display device using a liquid crystal generally has two liquid crystal panels with a portion serving as a liquid crystal injection port being left at a peripheral portion. After the substrates are bonded together, the liquid crystal is sealed through an injection port, and then the injection port is sealed with a sealing portion made of a UV curable resin or the like. In order to seal the liquid crystal with sufficient reliability, the sealing portion has to be slightly raised from the end face of the liquid crystal panel.

[0003] Since the sealing portion has such a shape protruding from the end face of the liquid crystal panel, interference with a housing or other parts holding the liquid crystal panel is likely to occur. If the sealing portion is degraded or damaged due to an impact or force due to such interference, bubbles are generated in the liquid crystal panel, resulting in display failure.

In addition, the rise of the sealing portion makes it difficult to position the liquid crystal panel, which causes a displacement between the liquid crystal panel and the backlight, and a part of the liquid crystal display cannot be seen in a transmissive panel display. It can also happen.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to provide a projection portion of a display panel, for example, a sealing portion for a liquid crystal, which is unlikely to be deteriorated or damaged. An object of the present invention is to provide a display device in which a shift is less likely to occur and an electronic device using the display device.

[0006]

(1) A display device according to the present invention is a display device formed by fixing a display panel with a fixed frame, wherein the display panel protrudes from an end surface of the display panel. Having a protrusion, the fixed frame is provided on a plurality of sides of the frame, and a plurality of positioning portions for positioning the display panel at a predetermined position in a plane substantially parallel to the frame. , And the positioning portion facing the end face provided with the protrusion is in contact with the end face avoiding the protrusion.

[0007] According to the present invention, since the positioning portion disposed so as to avoid the bulge of the protruding portion abuts against the end face of the display panel to position the display panel, the positioning portion is irrespective of the presence of the protruding protruding portion. Instead, the display panel can be stably positioned and fixed at a predetermined position in a plane substantially parallel to the frame portion of the fixed frame.

Further, according to the present invention, the display panel can be stably positioned and fixed at a predetermined position in a plane substantially parallel to the frame portion of the fixing frame. It does not interfere with parts and the like, and there is no possibility that the protruding portion is deteriorated or damaged due to an impact or force accompanying the interference. Therefore, air does not enter the display panel due to such deterioration or breakage of the protruding portion, and display defects do not occur.

(2) In the display device according to the present invention, the plurality of positioning portions position the display panel in a plane substantially parallel to the frame portion and at a predetermined position in the thickness direction of the frame portion. Features.

According to the present invention, the display panel can be stably positioned and fixed at a predetermined position substantially in the thickness direction of the frame portion in addition to the plane substantially parallel to the frame portion of the fixed frame, and further reliably. The liquid crystal panel can be positioned and fixed.

(3) The display device according to the present invention further comprises a backlight disposed on the back of the display panel, and the fixing frame also fixes the backlight.

According to the present invention, the display panel and the backlight can be fixed collectively by the fixing frame.
Accurate positioning of the display panel and the backlight can be performed, and a position shift can be prevented. As a result, defective lighting and poor contrast of the display device can be prevented.

(4) The display device according to the present invention is characterized in that the fixed frame also serves as a protection frame for protecting the display panel from the front side.

According to the present invention, the display panel can be positioned and fixed by the fixing frame, and the display panel can be protected from the front side.

(5) The display device according to the present invention is characterized in that the fixed frame is formed of metal.

According to the present invention, since the fixed frame is formed of metal, a thin, sufficiently strong, highly heat-dissipating fixed frame can be obtained.

(6) The display device according to the present invention is characterized in that the positioning portion makes substantially point contact with the display panel.

According to the present invention, since the positioning portion abutting on the end face of the display panel is substantially in point contact, the transmission of the environmental temperature transmitted from the fixed frame to the display panel can be reduced.

(7) In the display device according to the present invention, in the positioning portion, a portion in contact with the display panel is formed as a convex portion, and the convex portion has a height equal to or greater than a height at which the projecting portion projects from the end face. It is characterized by having a height.

According to the present invention, the projection formed on the positioning portion of the fixed frame has a height equal to or higher than the height at which the projection projects from the end surface of the display panel. In this case, interference between surrounding parts and the like and the protruding portion can be prevented. If the heights of the protrusion and the protrusion are substantially equal, the required space can be minimized and the protrusion can be protected.

(8) The display device according to the present invention is characterized in that the positioning portion makes surface contact with the display panel.

According to the present invention, since the positioning portion in contact with the end surface of the display panel is in surface contact with the display panel,
The heat generated by the display panel can be sufficiently transmitted to the fixed frame to release the heat.

(9) The display device according to the present invention is characterized in that the display panel is a liquid crystal panel, and the protruding portion is a sealing portion for sealing an injection port into which liquid crystal is injected.

According to the present invention, the positioning portion, which is arranged so as to avoid the bulging of the sealing portion, comes into contact with the end face of the liquid crystal panel, and the liquid crystal panel is positioned and fixed. Despite the presence of the portion, the liquid crystal panel can be stably positioned and fixed at a predetermined position in a plane substantially parallel to the frame portion of the fixed frame. Therefore, the sealing portion is not deteriorated or damaged due to impact or force caused by interference between the sealing portion and the housing or other components. Therefore, with such deterioration and breakage of the sealing portion,
No air bubbles enter the liquid crystal panel and display defects do not occur.

Further, despite the presence of the projecting sealing portion, the liquid crystal panel can be stably positioned and fixed at a predetermined position in a plane substantially parallel to the frame portion of the fixing frame. In addition, a position shift between the liquid crystal panel and the backlight does not occur, and a part of the liquid crystal display does not become invisible in the transmissive display.

(10) An electronic apparatus according to the present invention includes any one of the above display devices as a display unit.

According to the present invention, it is possible to obtain an electronic apparatus having the above-described functions and effects of the display device and having highly reliable display means.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below more specifically with reference to the drawings.

1. Display Device As an example of the display device of the present invention, a liquid crystal display device which is a display device using liquid crystal will be described. FIG. 1 is an exploded perspective view schematically showing a liquid crystal display device 10 as a display device of the present embodiment. As shown in FIG. 1, a liquid crystal display device 10 of the present embodiment includes a liquid crystal panel 14 as a display panel, and a protection frame 12 disposed on the front surface of the liquid crystal panel 14.
A fixed frame 30 disposed on the back of the liquid crystal panel 14,
A backlight 40 disposed on the back of the fixed frame 30 and a shield case 52 disposed on the back of the backlight 40
And is provided.

The protection frame 12 has a display window 13 having a size corresponding to the display area of the liquid crystal panel 14.
Is physically protected.

The liquid crystal panel 14 includes a pair of opposed substrates 1.
Liquid crystal is sealed between the substrates 6 and 16, and a polarizing plate 18 is attached to the outer surface of the substrate 16. In addition, the liquid crystal panel 14 includes a sealing portion 22 made of, for example, a UV curable resin on one end surface to seal the liquid crystal after the liquid crystal is injected. In order to realize highly reliable sealing, the sealing portion 22 is formed, for example, with the end surface 20 of the liquid crystal panel 14 and the sealing portion 22.
It is formed as a protruding portion having a swelling shape from the end face 20 for the purpose of increasing the contact area thereof and preventing intrusion of bubbles and the like from the outside. And the liquid crystal panel 14
, A wiring board 24, for example, an FPC (flexible wiring board) is connected to the terminal portion. The polarizing plate 18 is also attached to the surface of the substrate 16 facing the backlight 40 (not shown).

The backlight 40 includes a fluorescent tube 46, a light guide plate 44 for guiding light from the fluorescent tube 46 toward the entire display area of the liquid crystal panel 14, and a light use efficiency disposed on the front side of the light guide plate 44. And a reflection sheet 50 disposed on the back side of the light guide plate 44 and reflecting light leaked from the light guide plate 44 to the back side to the front side. Further, the fluorescent tube 46 is provided with a terminal portion 47 for connecting a power supply of a predetermined voltage.

The shield case 52 houses an inverter (not shown), which is a power supply for generating a predetermined voltage supplied to the fluorescent tube 46, and the backlight 40.

The fixed frame 30 is formed of metal and is disposed between the liquid crystal panel 14 and the backlight 40. FIG. 2 is a side view showing the fixed frame 30 and the liquid crystal panel 14 vertically separated from each other for convenience, and FIG. 3 is a plan view showing a state where the liquid crystal panel 14 is held by the fixed frame 30. .
FIGS. 4 and 5 are side views of the fixed frame 30 shown in FIGS. 2 and 3 as viewed from the left and right sides in those figures.

As shown in these figures, the fixed frame 30
A frame section 31 and a plurality of positioning sections 32 and 36 are provided. The fixed frame 30 positions and fixes the liquid crystal panel 14 at a predetermined position in a plane substantially parallel to the frame 31 of the fixed frame 30 by the plurality of positioning portions 32 and 36 abutting on the end surface of the liquid crystal panel 14. ing. The liquid crystal panel 14
The sealing portion 22, that is, the positioning portion 32 facing the end surface 20 having the protruding portion is provided at a position avoiding the sealing portion 22 and is in contact with the end surface 20 of the liquid crystal panel 14. Also,
The fixed frame 30 is arranged between the liquid crystal panel 14 and the backlight 40, and forms a predetermined gap between the liquid crystal panel 14 and the backlight 40 by the frame portion 31 to generate interference fringes, and Moiré caused by optical interference between the drive lines of the panel and the stripes of the lens sheet 42 of the backlight 40 is prevented.
Further, since a gap is provided between the liquid crystal panel 14 and the backlight 40, the liquid crystal panel 14 does not come into contact with the lens sheet 42, so that the lens sheet 42 can be prevented from being damaged or damaged. Note that the fixed frame 30 also includes a claw portion 38 that comes into contact with an end surface of the backlight 40, and the backlight 40 is positioned and fixed by the claw portion 38.

FIG. 6A is an enlarged side view showing the positioning portion 32 encircled in FIG. As shown in this figure, a portion of the positioning portion 32 that contacts the liquid crystal panel 14 is formed as a substantially hemispherical convex portion 34. Further, as is apparent from FIG. 3, the height of the convex portion 34 is substantially equal to the height of the sealing portion 22 protruding from the end face of the liquid crystal panel 14. In addition, the positioning portion 32 is in a state of being substantially in point contact with the end surface 20 of the liquid crystal panel 14 because the convex portion 34 that contacts the liquid crystal panel 14 has a tapered shape.

As shown in FIG. 6B, the positioning portion 36 which comes into contact with the end surface 20 of the liquid crystal panel 14 on the side to which the wiring board 24 is connected has a leaf spring-shaped portion which comes into contact with the liquid crystal panel 14. The liquid crystal panel 14
, And the liquid crystal panel 14 is positioned in cooperation with the positioning part 32 which comes into contact with the end face 20 on which the sealing part 22 is formed. That is, the positioning portion 32 exerts a pressing force on the liquid crystal panel 14 as a reaction to the pressing force exerted on the liquid crystal panel 14 by the positioning portion 36 having the spring-like portion. In addition, if the positioning portion 36 is formed so as to exert a pressing force on the liquid crystal panel 14,
It may be formed in another shape. For example, the positioning portion 36 may be formed to include a coil spring-shaped portion.

As described above, in the liquid crystal display device 10 according to the present embodiment, the positioning portion 32 of the fixed frame 30 for positioning the liquid crystal panel 14 is configured such that the positioning portion 32 of the liquid crystal panel 14 avoids the sealing portion 22 protruding from the end surface 20 of the liquid crystal panel 14. Since the liquid crystal panel 14 is in contact with the end surface 20 of the panel 14, the liquid crystal panel 14 is stably positioned at a predetermined position in a plane substantially parallel to the frame 31 of the fixed frame 30 irrespective of the presence of the sealing portion 22 protruding. Fixed. Therefore, interference between the sealing portion 22 and the housing or other components does not occur, and the sealing portion 22 is not degraded or damaged due to an impact or force due to such interference. Therefore, no bubbles are generated in the liquid crystal panel 14 due to such deterioration or breakage of the sealing portion 22, and a display defect does not occur. Further, there is no displacement between the liquid crystal panel 14 and the backlight 40, the display window 13 of the protection frame 12, and the like, so that a part of the liquid crystal display does not become invisible.

Further, the liquid crystal display device 10 has a fixed frame 30.
Of the liquid crystal panel 14 has a height substantially equal to the height at which the sealing portion 22 protrudes from the end surface 20 of the liquid crystal panel 14. In addition, interference between peripheral parts and the like and the sealing portion 22 can be prevented. Moreover, since the height of the projection 34 and the height of the sealing portion 22 are substantially equal, the required space can be minimized and the sealing portion 22 can be protected.

In the liquid crystal display device 10, since the fixed frame 30 also fixes the backlight 40, the fixed frame 3
With 0, the liquid crystal panel 14 and the backlight 40 can be fixed together. Therefore, accurate positioning of the liquid crystal panel 14 and the backlight 40 can be achieved, and mutual displacement can be prevented, whereby defective lighting and poor contrast of the liquid crystal display device can be prevented.

Further, in the liquid crystal display device 10, since the fixed frame 30 is formed of metal, the thin fixed frame 30 having sufficient strength and high heat dissipation can be obtained.

The liquid crystal display device 10 includes the liquid crystal panel 1
4, the convex portion 34 of the positioning portion 32 abutting on the end surface 20 is
Since there is almost point contact, transmission of the environmental temperature to the liquid crystal panel 14 can be reduced.

2. Electronic Device Equipped with Display Device FIGS. 7A, 7B, and 7C are external views showing examples of electronic devices using the liquid crystal display device 10 as the display device of the present embodiment as a display unit. is there. FIG. 7A shows a mobile phone 88 having a liquid crystal display device 10 at the upper front thereof. FIG. 7B shows a wristwatch 92, in which a display unit using the liquid crystal display device 10 is provided at the center of the front of the main body. FIG. 7C illustrates a portable information device 96 including a display unit including the liquid crystal display device 10 and an input unit 98. These electronic devices include various circuits such as a display information output source, a display information processing circuit, a clock generation circuit, and a power supply circuit for supplying power to those circuits, which are not shown, in addition to the liquid crystal display device 10. And a display signal generator. For example, in the case of a portable information device, a display image is formed by supplying a display signal generated by a display signal generation unit based on information input from the input unit 98 to the display unit.

The electronic devices into which the liquid crystal display device 10 of the present embodiment is incorporated are not limited to portable telephones, watches, and portable information devices, but may be notebook computers, electronic notebooks, pagers, calculators, POS terminals, IC cards, and the like. And various electronic devices such as a mini-disc player.

By using the display device of the present invention for the display section of the electronic device, it is possible to obtain an electronic device having a highly reliable display means having the above-described effects of the display device of the present invention.

3. Modification 3.1 In the above, an example has been shown in which the positioning portions 32 and 36 are provided only in the fixed frame 30 so as to face the end faces located on the two sides of the liquid crystal panel 14. However, a positioning portion may be provided in the fixed frame 30 so as to face an end face located on three or four sides of the liquid crystal panel 14. Thus, by arranging the plurality of positioning portions such that the positioning portions abut on three or more end surfaces, the liquid crystal panel 14 can be positioned more reliably.

3.2 In the above, the liquid crystal panel 14
The example has been described in which the liquid crystal panel 14 is positioned and fixed at a predetermined position in a plane substantially parallel to the frame portion 31 of the fixed frame 30 by the fixed frame 30 located between the fixed frame 30 and the backlight 40.
However, as shown in a schematic exploded perspective view in FIG. 8, a protection frame 72 for protecting the liquid crystal panel 14 from the front side.
In addition, a positioning portion 74 is provided which comes into contact with an end surface of the liquid crystal panel 14 so as to position and fix the liquid crystal panel 14 at a predetermined position in a plane substantially parallel to the frame portion 31 of the fixed frame 30. The fixed frame 14 may also be used. According to such a fixing frame, the liquid crystal panel 14 can be positioned and fixed, and the liquid crystal panel 14 can be protected from the front side.

3.3 In the above, the positioning section 32
In the example shown in FIG. 3, the height of the convex portion 34 is substantially equal to the height of the sealing portion 22 of the liquid crystal panel protruding from the end surface 20 of the liquid crystal panel 14. However, the height of the projection 34 is such that the sealing portion 22 is positioned at the end surface 20 of the liquid crystal panel 14.
The height may be greater than the height of the projection. Thereby, in the liquid crystal panel 14, the possibility that peripheral components or the like interfere with the sealing portion 22 on the end surface 20 including the sealing portion 22 can be further reduced.

3.4 In the above description, an example has been shown in which the positioning portion 32 is formed with the convex portion 34, and comes into almost point contact with the end face 20 of the liquid crystal panel.

However, the positioning part 32 is not
As shown in (C) or (D), it may be formed in a flat shape and brought into surface contact with the end face 20 of the liquid crystal panel 14. As a result, the positioning portion 32 comes into surface contact with the end surface 20 of the liquid crystal panel 14, so that the heat generated by the liquid crystal panel 14 can be sufficiently transmitted to the fixed frame 30 to release the heat, and display by heat can be performed. Color unevenness can be reduced.

The positioning section 32 is a drawing corresponding to FIG. 6 (A), that is, FIGS. 6 (B), (E), (F),
(G), (H), (J), or (K) can also be formed. 6 (A), (B),
In the shapes shown in (F), (G), (H), (J), or (K), as shown in the respective drawings, they extend so as to extend outside the liquid crystal panel 14 in the front direction of the liquid crystal panel 14. The first slope portions 32a and 36a are provided, and can be used as a guide for assembling the liquid crystal panel 14 into the fixed frame 30, thereby facilitating the assembly of the liquid crystal display device.

3.5 In the above, the positioning unit 3
2 and 36, the liquid crystal panel 14 is positioned and fixed at a predetermined position in a plane substantially parallel to the frame portion 31 of the fixed frame 30. The positioning portions 32 and 36 are shown in FIG.
By forming the liquid crystal panel 14 into the shape shown in (H), (I), (J) or (K), the liquid crystal panel 14 is formed in a plane substantially parallel to the frame 31 of the fixed frame 30 and in a substantially thickness direction of the frame 31. It can be positioned and fixed at a predetermined position. That is, FIGS. 6 (H), (I),
As shown in (J) and (K), second slopes 32b, 36b narrowing inward in the front direction of the liquid crystal panel 14 are provided at positions in contact with the front side end 20a of the liquid crystal panel 14, and the second slopes are provided. The liquid crystal panel 14 is sandwiched between the slopes 32 b and 36 b and the frame 31. As a result, the liquid crystal panel 14 can be positioned and fixed in a plane substantially parallel to the frame 31 of the fixed frame 30 and at a predetermined position in the thickness direction of the frame 31. With this configuration, the liquid crystal panel 14 can be positioned more reliably.

3.6 In the above, the positioning unit 3
Although an example is shown in which the hooks 2 and 36 are formed in a nail shape, a shape that contacts the end face 20 over the entire length range of the side of the liquid crystal panel 14 except for the portion to which the wiring board 24 is connected or the sealing portion 22 The positioning portions 32 and 36 may be used.

3.7 In the above, the example of the display device 10 using the liquid crystal panel 14 as the display panel has been described. However, the display panel is not limited to the liquid crystal panel, but may be a CRT panel, a plasma panel, or an FED (Field Emission). Display)
Another display panel such as a panel may be used. In addition,
When a self-luminous display panel such as a CRT panel, a plasma panel, or an FED panel is used as the display panel, no backlight is required.

3.8 The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, but falls within the scope of the present invention or within the equivalent scope of the claims. Further, various modifications can be made.

[Brief description of the drawings]

FIG. 1 is a schematic exploded perspective view showing a liquid crystal display device according to an embodiment.

FIG. 2 is a side view showing the fixed frame and the liquid crystal panel in a state where they are vertically separated from each other for convenience.

FIG. 3 is a plan view showing a state where a liquid crystal panel is held by a fixed frame.

FIG. 4 is a side view of the fixed frame shown in FIGS. 2 and 3 as viewed from the left side.

FIG. 5 is a side view of the fixing frame shown in FIGS. 2 and 3 as viewed from the right side.

FIG. 6A is an enlarged side view showing a positioning portion circled in FIGS. 2 and 3;
(B), (C), (D), (E), (F), (G),
(H), (I), (J) and (K) are side views showing modifications thereof.

FIGS. 7A and 7B are external views showing an electronic device using the liquid crystal display device of the embodiment, where FIG. 7A is a mobile phone, FIG. 7B is a wrist watch, and FIG. 7C is a mobile information device.

FIG. 8 is a schematic exploded perspective view showing a liquid crystal display device of a modified example in which a protective frame is also used as a fixed frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Liquid crystal display device 12, 72 Protective frame 14 Liquid crystal panel 20 End surface 22 Sealing part 30 Fixed frame 32, 36, 74 Positioning part 34 Convex part 40 Backlight

Claims (10)

[Claims] 1. A display device in which a display panel is formed by being fixed by a fixed frame, wherein the display panel has a projecting portion projecting from an end face of the display panel, wherein the fixed frame has a frame portion, A plurality of positioning portions provided on a plurality of sides of the frame portion for positioning the display panel at a predetermined position in a plane substantially parallel to the frame portion, wherein the positioning portion opposes the end surface including the protruding portion. The display device, wherein the positioning part is in contact with the end face while avoiding the protruding part. 2. The display according to claim 1, wherein the plurality of positioning portions position the display panel in a plane substantially parallel to the frame portion and at a predetermined position in the thickness direction of the frame portion. apparatus. 3. The display device according to claim 1, further comprising a backlight disposed on a back surface of the display panel, wherein the fixing frame also fixes the backlight. 4. The display device according to claim 1, wherein the fixed frame also serves as a protection frame for protecting the display panel from the front side. 5. The display device according to claim 1, wherein the fixing frame is formed of metal. 6. The display device according to claim 1, wherein the positioning portion makes substantially point contact with the display panel. 7. The positioning portion according to claim 1, wherein a portion of the positioning portion that is in contact with the display panel is formed as a protrusion, and the protrusion has a height at which the protrusion protrudes from the end surface. A display device having a height higher than the height. 8. The display device according to claim 1, wherein the positioning portion makes surface contact with the display panel. 9. The display panel according to claim 1, wherein the display panel is a liquid crystal panel, and the projecting portion is a sealing portion that seals an injection port into which liquid crystal is injected. Display device. 10. An electronic apparatus comprising the display device according to claim 1 as display means.