JP2579040Y2 - LCD panel device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight-equipped liquid crystal panel device used in a viewfinder of a video camera or the like.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional example of a liquid crystal panel device with a backlight implemented in a viewfinder or the like of a video camera. In this case, a liquid crystal panel (2) and a backlight (4) are accommodated in a case (1), a back cover (7) is attached to the case (1), and a circuit board (8) is provided outside the back cover (7). ) Is provided.

An elastic body (6) for regulating the distance from the liquid crystal panel (2) is mounted on the outer periphery of the front surface of the backlight (4). The rear cover (7) is provided with locking holes (72) (7
2), and the projections (16) (16) of the case (1) are fitted into the locking holes (72). A socket (42) protrudes from the substrate (40) on the back of the backlight (4), and the socket (42) is provided on the rear cover (7).
A hole (73) through which the (42) can protrude is opened, and a plug (81) of the circuit board (8) is fitted into the socket (42).

[0004]

In the above liquid crystal panel device, the distance between the liquid crystal panel (2) and the backlight (4) is determined by the compression thickness of the elastic body (6), and the two approach each other. Therefore, the temperature of the liquid crystal panel (2) rises due to the heat generated by the backlight (4). Further, the space between the liquid crystal panel (2) and the backlight (4) is shut off from the outside by the elastic body (6), and heat is collected in the space to promote the temperature rise of the liquid crystal panel (2), Eventually, the liquid crystal may be destroyed.

Further, due to the presence of the back cover (7), the backlight lighting circuit cannot be mounted on the back substrate (40) of the backlight (4), and the substrate (8) constituting the backlight lighting circuit cannot be mounted.
Must be provided outside the back cover (7). The present invention is to clarify a liquid crystal panel device that solves the above problem.

[0006]

The liquid crystal panel device of the present invention comprises a case (1) and a liquid crystal panel (2) provided in the case.
And the liquid crystal panel (2) held by the case (1) and the case (1).
A backlight holder (3) sandwiched between the inner surface of the
Backlight supported by backlight holder (3)
(4) wherein the case (1) has a rectangular opening for determining the size of the screen on the front plate (11).
(14), and side plates (12) (1) protruding from both sides of the front plate (11).
2) Open the locking holes (15) and (15) in the backlight holder.
(3) is a rectangular hole slightly smaller than the outer shape of the backlight (4)
On both sides of the frame plate (31) where the (32) is opened, there are ribs (33) abutting on the back surface of the liquid crystal panel (2), and the projections (34) protruding from the outer surface of the rib (33) are A plurality of claw pieces (36) (36) that engage with the locking holes (15) of the case side plate (12) and protrude rearward from the frame plate (31).
The backlight (4) and the circuit board (41) attached to the back of the backlight are hooked and supported by (36).

[0007]

[Operation and Effect] The distance between the liquid crystal panel (2) and the backlight (4) is determined by the projection length of the rib (33) of the backlight holder (3). If the projection length of the rib (33) is determined so that the distance from the liquid crystal panel (4) becomes optimum, the problem caused by the liquid crystal panel (2) and the backlight (4) being too close does not occur.

The space between the liquid crystal panel (2) and the backlight (4) is not isolated from the outside but is open to the outside, so that heat is prevented from being trapped in the space, The temperature rise of the liquid crystal panel (2) can be suppressed. Since the back substrate (41) of the backlight (4) is open,
1) A backlight lighting circuit can be formed thereon, and one substrate can be omitted.

[0009]

FIG. 3 shows a state in which the liquid crystal panel device according to the present invention is incorporated in a viewfinder of a video camera. The liquid crystal panel device P is mounted in the hollow viewfinder main body (5), a square tube (51) is protruded from the end of the book (5), and a slide tube (52) slides on the square tube (51). Lenses (53) and (54) are built in the slide cylinder (52) with a possible fit. The inner surface of the rectangular tube portion (51) is formed in a saw-tooth shape on the four surfaces on the upper, lower, and both sides. This is to prevent light reflected from the liquid crystal panel device P from hitting the inner surface of the rectangular tube portion (51) from entering the eyes and making it hard to see.

The liquid crystal panel device P includes a case (1), a liquid crystal panel (2) provided in the case, and the liquid crystal panel (2) held by the case (1) and the inner surface of the case (1). It comprises a backlight holder (3) sandwiched therebetween and a backlight (4) supported by the backlight holder (3).

The case (1) is made of synthetic resin and is made of a front plate (1).
1) and side plates (1) projecting from both side edges and the lower edge of the front plate (11).
2) Consisting of (12) and a bottom plate (13), the upper surface and the rear surface are open. The front plate (11) is a rectangular opening (14) that determines the size of the screen
And both side plates (12) (12) have locking holes (15) (15).

The liquid crystal panel (2) is set on a frame (22) and has a harness (21) protruding therefrom. The backlight (4) has a substrate (41) fixed to the back surface, and a backlight lighting circuit (43) is formed on the substrate (41).

The backlight holder (3) is formed of a synthetic resin and has ribs facing forward on both sides of a frame plate (31) having a rectangular hole (32) slightly smaller than the outer shape of the backlight (4). (33), positioning pieces (35) and (35) are protruded rearward. Projections (34) and (34) that can be engaged with and disengaged from the locking holes (15) of the case (1) are provided on the outer surfaces of the ribs (33) and (33).

A plurality of claw pieces (36), (36), (36) project from the upper and lower portions of the frame plate (31) toward the rear, and the claw pieces (36) are attached to the backlight back substrate (41). A hook portion (37) to be hooked is formed. The length from the back of the frame plate (31) to the hook (37) of the nail piece (36) is the length of the backlight (4) and the backlight back substrate.
This corresponds to the value obtained by adding the thickness of (41).

Then, the liquid crystal panel (2) is fitted into the case (1), and the backlight holder (3) is inserted from the back of the case (1). Due to the elastic deformation of the resin, the case (1) opens between the side plates (12) and (12) to allow the backlight holder (3) to enter, and the protrusions on both sides of the backlight holder (3).
(34) If (34) reaches the locking holes (15) (15) of the side plates (12) (12),
The case (1) returns to its original shape, and the projection (34) fits into the locking hole (15).

In the above state, the ribs (33) of the backlight holder (3) press the back surface of the frame (22) of the liquid crystal panel (2),
The liquid crystal panel (2) is held by the front plate (11) of the case (1) and the backlight holder (3).

The backlight (4) having the back substrate (41) is pressed between the positioning pieces (35) and (35) of the backlight holder (3) and between the upper and lower claw pieces (36) and (36). The claw pieces (36) and (36) are bent outward due to elastic deformation of the resin, and elastically return with the front surface of the backlight (4) hitting the back surface of the backlight holder frame plate (31). ) Is hooked on the edge of the backlight rear substrate (41).

As described above, the distance between the liquid crystal panel (2) and the backlight (4) depends on the rib (3) of the backlight holder (3).
Because it is determined by the protrusion length of 3), the liquid crystal panel (2)
Rib (33) so that the distance between it and backlight (4) is optimal
LCD panel (2) and backlight
(4) is prevented from getting too close. Liquid crystal panel (2)
The space between the backlight and the backlight (4) is not blocked from the outside and is open to the outside, so that heat is prevented from being trapped in the space and the temperature of the liquid crystal panel (2) rises. Can be prevented from being destroyed.

The description of the above embodiment is for the purpose of illustrating the present invention, and should not be construed as limiting the invention described in the claims for utility model registration or reducing the scope. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made within the technical scope described in the claims for utility model registration.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a liquid crystal panel device.

FIG. 2 is an assembled sectional view of the liquid crystal panel device.

FIG. 3 is an exploded perspective view of a conventional liquid crystal panel device.

FIG. 4 is a sectional view of a view finder of the video camera.

[Explanation of symbols]

 (1) Case (15) Lock hole (2) LCD panel (3) Backlight holder (34) Projection (36) Claw piece (4) Backlight

Claims (1)

(57) [Scope of request for utility model registration] 1. A case (1), a liquid crystal panel (2) provided in the case, and a liquid crystal panel held by the case (1).
A liquid crystal panel device comprising a backlight holder (3) sandwiching (2) between the inner surface of a case (1) and a backlight (4) supported by the backlight holder (3). The case (1) has a rectangular opening (14) for determining the size of the screen on the front plate (11), and side plates (12) (12) protruding on both sides of the front plate (11). The locking holes (15) and (15) are opened, and the backlight holder (3) is provided on both sides of the frame plate (31) with the rectangular holes (32) slightly smaller than the outer shape of the backlight (4). 2) having a rib (33) in contact with the back surface of the rib (33);
The projections (34) projecting from the outer surface of the case engage with the locking holes (15) of the case side plate (12), and a plurality of claw pieces (36) (36) ( 36) A liquid crystal panel device in which the backlight (4) and the circuit board (41) attached to the back of the backlight are hooked and supported by (36).