JP2011002708A - Holding structure for display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a holding structure for a display panel capable of preventing an elastic member contacting with the front peripheral edge of the display panel from moving toward the inside of a holding frame, and capable of avoiding deterioration in display definition.SOLUTION: The holding structure for a display panel includes: a frame body 2 which supports the rear side of the display panel 1 having a display screen 1a on the front side thereof; and the holding frame 3 which holds the display panel 1 while pressurizing the front peripheral edge of the display panel 1 to the frame body 2 through the elastic member 4. A bent (projecting part) 31a which is bent projecting from the inner peripheral edge of the holding frame 3 toward the display panel 1 is disposed on the holding frame 3 so as to prevent the elastic member 4 from moving toward the inner peripheral side of the frame.

Description

  The present invention relates to a display panel holding structure for preventing damage to a display panel and entry of dust and the like.

  A display device such as a liquid crystal display or a plasma display has a display surface on the front side in order to prevent impact on the display panel when the device is assembled and to prevent entry of dust or the like into the peripheral edge of the display panel. 2. Description of the Related Art A display panel holding structure including a support portion that supports the rear side of a display panel and a holding frame that presses and holds a front peripheral edge portion against a rear support portion via an elastic member (spacer) is known. (For example, refer to Patent Document 1). Here, the elastic member is made of an elastic material such as rubber, and is bonded to the inner surface of the holding frame, which is a molded product such as plastic, with an adhesive.

Japanese Patent Laid-Open No. 2005-202036

  In the conventional display panel holding structure, since the thermal expansion coefficient of the holding frame and the thermal expansion coefficient of the elastic member are different, the holding frame and the elastic member are repeatedly formed by repeating the high temperature condition when the power is turned on and the low temperature condition when the power is turned off. May move relative to each other, and the adhesive that adheres the elastic member to the holding frame may deteriorate due to shear stress. As a result, the elastic member peels off from the holding frame and moves to the inner peripheral side of the holding frame, and protrudes inward from the inner peripheral edge, resulting in a problem that display quality is lowered.

  The present invention has been made in view of the above-described circumstances, and prevents the elastic member in contact with the peripheral edge on the front side of the display panel from moving to the inside of the holding frame, thereby reducing the display quality. An object of the present invention is to provide a display panel holding structure that can be avoided.

The display panel holding structure according to the present invention includes a support portion that supports the rear side of the display panel having a display surface on the front side, and a front peripheral edge portion of the display panel that is pressed against the support portion via an elastic member. In the display panel holding structure including the holding frame, the holding frame includes a movement preventing unit that prevents the elastic member from moving toward the inner peripheral side of the frame.
According to the present invention, when the rear side of the display panel having the display surface on the front side is supported by the support part, and the peripheral edge part of the front side of the display panel is pressed against the support part via the elastic member and held, The movement preventing portion of the holding frame prevents the elastic member from moving toward the inner peripheral side of the holding frame.

The holding structure of the display panel according to the present invention is characterized in that the movement preventing portion is a convex portion protruding from the inner peripheral side edge of the holding frame toward the display panel.
According to the present invention, when the elastic member tries to move to the inner peripheral side of the holding frame, the elastic member comes into contact with the convex portion protruding from the inner peripheral side edge of the holding frame to the display panel side, and moves toward the inner peripheral side of the holding frame. Movement is prevented.

The display panel holding structure according to the present invention is characterized in that a plurality of the convex portions are formed apart from each other in the circumferential direction of the holding frame.
According to the present invention, since a plurality of convex portions are formed apart from each other in the circumferential direction of the holding frame, the weight can be reduced as compared with the case where they are formed on the entire circumference of the holding frame.

The display panel holding structure according to the present invention is characterized in that the movement preventing portion is a concavo-convex pattern provided in a portion in contact with the elastic member.
According to the present invention, since many convex portions of the concavo-convex pattern provided on the portion of the holding frame that comes into contact with the elastic member bite into the elastic member and become resistance to movement, the elastic member moves toward the inner peripheral side of the holding frame. Movement is prevented.

The display panel holding structure according to the present invention is characterized in that the movement preventing portion is a plurality of convex portions or concave portions provided in a circumferentially spaced manner on a portion in contact with the elastic member.
According to the present invention, when a plurality of convex portions or concave portions are provided in the circumferential direction at the portion of the holding frame that comes into contact with the elastic member, the corners of the edges of the convex portions or the concave portions bite into the elastic member. Therefore, the elastic member is prevented from moving toward the inner peripheral side of the holding frame.

In the display panel holding structure according to the present invention, the movement preventing portion is a concave groove capable of accommodating the elastic member.
According to the present invention, the elastic member accommodated in the concave groove provided in the holding frame abuts against the end of the concave groove when moving and is prevented from moving out of the concave groove. The movement of the holding frame to the inner peripheral side is prevented.

  According to the display panel holding structure according to the present invention, it is possible to prevent the elastic member in contact with the front peripheral edge of the display panel from moving to the inside of the holding frame, thereby avoiding deterioration in display quality. There is provided a display panel holding structure that can be used.

  According to the display panel holding structure according to the present invention, the protrusion of the holding frame protruding from the inner peripheral edge of the holding frame toward the display panel can reliably prevent the elastic member from moving toward the inner periphery of the holding frame. In addition, the convex portion becomes a guide portion when the elastic member is attached to the holding frame, and the attaching workability is improved by placing the elastic member along the convex portion.

  According to the display panel holding structure according to the present invention, by forming a plurality of convex portions apart from each other in the circumferential direction of the holding frame, it is possible to reduce the weight as compared with the case where the convex portion is formed on the entire circumference of the holding frame.

  According to the display panel holding structure according to the present invention, the uneven pattern provided on the portion of the holding frame that comes into contact with the elastic member serves as a resistance force for the movement of the elastic member. Movement is prevented. In addition, the concavo-convex pattern serves as a guide portion when the elastic member is attached to the holding frame.

  According to the display panel holding structure according to the present invention, the concave portion or the convex portion provided in the portion of the holding frame that comes into contact with the elastic member serves as a resistance force for the movement of the elastic member. Movement to is prevented. In addition, the concave portion or the convex portion becomes a guide portion when the elastic member is attached to the holding frame.

  According to the display panel holding structure of the present invention, the elastic member is accommodated in the concave groove provided in the holding frame, and the movement to the outside of the concave groove is prevented, so that the movement of the holding frame to the inner peripheral side is prevented. Is done. In addition, the concave groove serves as a guide portion when the elastic member is attached to the holding frame.

It is sectional drawing of the liquid crystal display device provided with the holding structure of the display panel which concerns on Embodiment 1 of this invention. It is the perspective view and sectional drawing which show the principal part of the holding structure of the display panel which concerns on Embodiment 2 of this invention. It is the perspective view and sectional drawing which show the principal part of the holding structure of the display panel which concerns on Embodiment 3 of this invention. It is the perspective view and sectional drawing which show the principal part of the holding structure of the display panel which concerns on Embodiment 4 of this invention. It is the perspective view and sectional drawing which show the principal part of the holding structure of the display panel which concerns on Embodiment 5 of this invention. It is the perspective view and sectional drawing which show the principal part of the holding structure of the display panel which concerns on Embodiment 6 of this invention. It is the perspective view and sectional drawing which show the principal part of the holding structure of the display panel which concerns on Embodiment 7 of this invention. It is the perspective view and sectional drawing which show the principal part of the holding structure of the display panel which concerns on Embodiment 8 of this invention.

  Hereinafter, a case in which the embodiment of the display panel holding structure according to the present invention is applied to a liquid crystal display device will be described with reference to the drawings.

Embodiment 1
FIG. 1 is a sectional view of a liquid crystal display device having a display panel holding structure according to Embodiment 1 of the present invention.

  The display panel holding structure according to the present invention includes a horizontally long rectangular frame 2 having a display surface 1a on the front side and supporting the rear side of the horizontally long rectangular display panel 1, and the front side of the display panel 1. And a holding frame 3 that holds the peripheral edge of the frame 2 against the frame body 2 via the elastic member 4. In addition, the liquid crystal display device is disposed behind the display panel 1 and includes an optical sheet 6 having a size corresponding to the size of the display panel 1, a plurality of illumination lamps (not shown), and a reflection sheet 7. And a backlight unit 8 for projecting illumination light toward the optical sheet 6, a circuit board 9 disposed on the rear side of the backlight unit 8, and the like.

  A front cabinet 10 having a frame 10a that covers the front side of the peripheral edge of the display panel 1 is formed, and a rear cabinet 11 that is connected to the outer peripheral end 10b of the front cabinet 10 and covers the rear side is provided. The display panel 1, the optical sheet 6, the backlight unit 8, and the like are accommodated in the front cabinet 10 and the rear cabinet 11.

  The frame body 2 includes an annular plate portion 21 positioned on the rear side of the peripheral portion of the display panel 1 via the elastic member 5 and a cylindrical portion 22 that is connected to the outer peripheral end of the annular plate portion 21 at the inner peripheral portion. It is integrally molded. A plurality of mounting holes 23 are formed in the front end portion of the cylindrical portion 22 at intervals in the circumferential direction. The elastic member 5 is bonded to the ring plate portion 21 with an adhesive.

  The holding frame 3 includes a front plate portion 31 positioned on the front side of the peripheral edge of the display panel 1 and a front end of the cylindrical portion 2b of the frame body 2 after being bent obliquely rearward from the outer peripheral end portion of the front plate portion 31. And a side plate portion 33 bent rearward at a right angle from the outer peripheral end portion of the intermediate portion 32 and having a substantially L-shaped cross section. On the outer peripheral side of the holding frame 3, through holes 34 are opened corresponding to the positions of the mounting holes 2 c of the frame 2.

  By inserting the male screw into the through hole 34 of the holding frame 3 and screwing it into the mounting hole 23, the holding frame 3 is coupled to the frame body 2, and the rear side of the display panel 1 is supported by the frame body 2. The peripheral edge on the front side of the display panel 1 is pressed and held by the holding frame 3 through the elastic member 4 to the frame body 2 side.

  The front plate portion 31 of the holding frame 3 is provided with a bent portion 31a, which is formed by bending the inner peripheral edge toward the display panel 1 so as to protrude from the inner peripheral edge toward the display panel 1 over the entire circumference. It is. The elastic member 4 is located on the outer peripheral side of the holding frame 3 with respect to the bent portion 31a, and is bonded to the front plate portion 31 with an adhesive. Even if the adhesive deteriorates and the elastic member 4 is peeled off from the front plate portion 31, the bent portion 31a prevents movement of the holding frame 3 toward the inner peripheral side (the display surface 1a side of the display panel 1). The bent portion 31a serves as a guide portion when the elastic member 4 is attached to the front plate portion 31, and the workability of attaching is improved by placing the elastic member 4 along the bent portion 31a.

  The elastic members 4 and 5 are, for example, high-density urethane foam (sponge) having a trade name of PORON (registered trademark of INOAC) manufactured by Inoac and having a thickness of about 1.5 mm. Due to the contact, the elastic member 4 follows the surface of the display panel 1 well, and the dustproof reliability is improved.

  A rectangular annular elastic spacer 12 is provided on the inner surface of the frame portion 10 a of the front cabinet 10, and the holding frame 3 is in contact with the inner surface of the frame portion 10 a of the front cabinet 10 via the elastic spacer 12. The elastic spacer 12 is, for example, a high-density urethane foam (sponge) manufactured by Inoac, similar to the elastic members 4 and 5. Due to the contact, the elastic spacer 12 follows the surface of the holding frame 3 well, and the dustproof reliability is improved.

  The backlight unit 8 includes a box-shaped chassis 8a and an attachment frame 8b for pressing and holding the peripheral edge of the optical sheet 6 against the opening of the chassis 8a. By attaching to the chassis 8a, the attachment frame 8b is sandwiched between the frame 2 and the chassis 8a.

Embodiment 2
FIG. 2 is a perspective view and a cross-sectional view showing the main part of the display panel holding structure according to Embodiment 2 of the present invention.
The second embodiment is different from the first embodiment only in that a plurality of bent portions 31b are formed on the front plate portion 31 of the holding frame 3 so as to be spaced apart in the circumferential direction. Since the bent portion 31b is not provided on the entire circumference of the holding frame 3, the weight is reduced.

Embodiment 3
3A and 3B are a perspective view and a cross-sectional view showing the main part of the display panel holding structure according to Embodiment 3 of the present invention.
The third embodiment is different from the second embodiment in that a plurality of protrusions 31c are formed by half punching on the front plate portion 31 of the holding frame 3 so as to be spaced apart in the circumferential direction. Since the protruding portion 31c is a portion of the front plate portion 31 of the holding frame 3 protruding, there is no increase in weight for the protruding portion 31c, and processing is easier than bending.

Embodiment 4
FIG. 4 is a perspective view and a cross-sectional view showing the main part of the display panel holding structure according to Embodiment 4 of the present invention.
The fourth embodiment is different from the third embodiment in that a plurality of linear protrusions 31d are formed by half punching on the front plate portion 31 of the holding frame 3 so as to be spaced apart in the circumferential direction. The linear protruding portion 31d serves as a guide portion when the elastic member 4 is attached to the front plate portion 31.

Embodiment 5
FIG. 5 is a perspective view and a cross-sectional view showing the main part of the display panel holding structure according to Embodiment 5 of the present invention.
In the fifth embodiment, only the point that the knurled uneven pattern 31e is formed along the circumferential direction on the surface of the front plate portion 31 of the holding frame 3 that contacts the elastic member 4 is the same as in the first to fourth embodiments. Different. In the fifth embodiment, a large number of convex portions of the concavo-convex pattern 31e bite into the elastic member 4 and become resistance to movement, and the movement of the elastic member 4 to the inner peripheral side of the holding frame 4 is prevented. The uneven pattern 31 e serves as a guide portion when the elastic member 4 is attached to the front plate portion 31.

Embodiment 6
FIG. 6 is a perspective view and a cross-sectional view showing the main part of the display panel holding structure according to Embodiment 6 of the present invention.
The sixth embodiment is different from the fifth embodiment in that a plurality of convex portions 31f are formed on the surface of the front plate portion 31 of the holding frame 3 that is in contact with the elastic member 4 and spaced apart in the circumferential direction. In the sixth embodiment, each convex portion 31 f bites into the elastic member 4 and becomes a resistance force of movement, and the movement of the elastic member 4 to the inner peripheral side of the holding frame 4 is prevented. The plurality of convex portions 31 f serve as guide portions when the elastic member 4 is attached to the front plate portion 31.

Embodiment 7
FIG. 7 is a perspective view and a cross-sectional view showing the main part of the display panel holding structure according to Embodiment 7 of the present invention.
The seventh embodiment is different from the sixth embodiment in that a plurality of concave portions 31g are formed in a circumferentially spaced manner on a surface of the front plate portion 31 of the holding frame 3 that contacts the elastic member 4. In the seventh embodiment, the corners of the end portions of the respective recesses 31g bite into the elastic member 4 to become a movement resistance force, and the movement of the elastic member 4 to the inner peripheral side of the holding frame 4 is prevented. The plurality of concave portions 31g serve as guide portions when the elastic member 4 is attached to the front plate portion 31.

Embodiment 8
FIG. 8 is a perspective view and a cross-sectional view showing the main part of the display panel holding structure according to Embodiment 8 of the present invention.
The eighth embodiment is different from the fifth to seventh embodiments in that a concave groove 31h that houses the elastic member 4 is formed on the surface of the front plate portion 31 of the holding frame 3 that contacts the elastic member 4. In the eighth embodiment, when the elastic member 4 moves, the elastic member 4 contacts the end of the concave groove 31h and is prevented from moving outside the concave groove, and the movement of the holding frame 4 to the inner peripheral side is prevented. The concave groove 31 h serves as a guide portion when the elastic member 4 is attached to the front plate portion 31.

  In the foregoing first to eighth embodiments, the display panel support structure according to the present invention is applied to the structure for supporting the display panel of the liquid crystal display device. However, the display panel of a display device such as a plasma display other than the liquid crystal display device is used. Applicable to supporting structure.

DESCRIPTION OF SYMBOLS 1 Display panel 1a Display surface 2 Frame (support part)
3 Holding frame 31a Bent part (convex part, movement prevention part)
31b Bent part (convex part, movement prevention part)
31c Protruding part (convex part, movement preventing part)
31d Protruding part (convex part, movement preventing part)
31e Uneven pattern (movement prevention part)
31f Convex part (movement prevention part)
31g Concavity (movement prevention part)
31h Groove (Moving prevention part)
4 Elastic members

Claims (6)

Holding a display panel comprising: a support portion that supports the rear side of the display panel having a display surface on the front side; and a holding frame that holds the front peripheral edge portion of the display panel against the support portion via an elastic member. In structure
The holding structure of the display panel, wherein the holding frame includes a movement preventing portion that prevents the elastic member from moving toward the inner peripheral side of the frame.   2. The display panel holding structure according to claim 1, wherein the movement preventing portion is a convex portion protruding from an inner peripheral side edge of the holding frame toward the display panel.   The display panel holding structure according to claim 2, wherein a plurality of the convex portions are formed apart from each other in a circumferential direction of the holding frame.   The display panel holding structure according to claim 1, wherein the movement preventing portion is a concavo-convex pattern provided in a portion in contact with the elastic member.   The display panel holding structure according to claim 1, wherein the movement preventing portion is a plurality of convex portions or concave portions that are provided in a circumferentially spaced manner at a portion that contacts the elastic member.   The display panel holding structure according to claim 1, wherein the movement preventing portion is a concave groove capable of accommodating the elastic member.

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