JP5627565B2 - Display device - Google Patents

Description

  The present invention relates to a display device, and more particularly to a display device in which a circuit board provided with a connector having a connector lock mechanism is disposed on a side surface of a lower frame that holds a display panel.

  In a display device such as a liquid crystal display device, a printed circuit board for driving a display panel is disposed on a side surface or a back surface of the display device. As shown in Patent Document 1, in a liquid crystal display device, a plurality of printed circuit boards include, for example, a printed circuit board having a timing controller (hereinafter referred to as a TCON board), and input from the TCON board to video signal lines of the liquid crystal display panel. There is a printed circuit board (hereinafter referred to as a drain PCB) that relays a signal to be transmitted. The TCON substrate is generally attached to the back surface of a frame member (hereinafter referred to as a lower frame), and the drain PCB or the like is attached to the side surface of the lower frame.

  The TCON substrate and the drain PCB are connected by a flexible printed wiring board (FPC) or a flexible flat cable (FFC). The drain PCB and the display panel are connected by a semiconductor package called TCP or COF in which a driver IC is mounted on the FPC. The drain PCB is provided with a connector having a connector lock mechanism for connecting a cable such as FFC connected to the TCON substrate.

  In a display device such as a medical monitor TFT product, an insulating substrate cover is provided to protect the TCON substrate. Further, the end portion of the substrate cover is bent and inserted into a gap between the upper frame that covers the side surface portion of the lower frame from the peripheral portion of the display panel and the circuit board such as the drain PCB disposed on the side surface of the lower frame. The connector and the upper frame are insulated by covering the connector mounted on the circuit board using the insertion portion formed at the end of the substrate cover.

JP 2008-58787 A

  However, when the insertion portion of the board cover is inserted, the tip of the insertion portion is caught by the connector lock mechanism of the connector mounted on the circuit board on the side surface of the lower frame, and if the insertion portion is further pushed in that state, the mechanism is released. As a result, the electrical connection between the FFC cable and the connector cannot be taken, causing a display defect.

  The problem to be solved by the present invention is to solve the above-mentioned problems and to release the connector lock mechanism of the circuit board connector disposed on the side surface of the lower frame when the substrate cover is attached during the assembly operation of the display device. This is to provide a display device that prevents this problem and suppresses display defects.

In order to solve the above problems, a display device having the following characteristics can be used.
(1) A lower frame for holding a display panel, and a first circuit board provided with a connector having a connector locking mechanism are disposed on a side surface of the lower frame, and another second circuit board is disposed on the back surface of the lower frame. And a circuit board cover that covers the side surface of the lower frame from the periphery of the display panel and a circuit board cover that covers the second circuit board, and the circuit board is interposed between the circuit frame and the connector. In a display device having a substrate cover having an insertion portion for inserting a part of the cover, the distal end shape of the insertion portion is configured to be in contact with the connector lock mechanism of the connector only locally. And

(2) In the display device according to (1), the distal end shape of the insertion portion is set so that the shape of the end portion is inclined with respect to the insertion direction.

(3) In the display device according to (1) or (2), the shape of the insertion portion is such that the width of the distal end portion is narrower than the width of the connector lock mechanism, and the connector is installed when the substrate cover is installed. The width of the upper portion is characterized by being wider than the width of the connector.

  As in the present invention, since the tip shape of the insertion portion of the board cover is configured to contact the connector locking mechanism of the connector only locally, the force that the connector locking mechanism receives from the insertion portion even when the insertion portion is pushed in. Can be reduced. In addition, since the insertion portion is locally deformed and slides on the upper surface of the connector, the board cover can be mounted without releasing the connector lock mechanism.

  Moreover, it is only necessary to change the tip shape of the board cover insertion part, so there is no additional parts or cost increase, and the insertion work of the board cover insertion part remains the same as before, preventing the occurrence of display defects. it can.

It is sectional drawing explaining the outline of the display apparatus of this invention. It is a figure explaining the relationship between the insertion part of the board | substrate cover used for the display apparatus of this invention, and the circuit board provided with the connector. It is a figure explaining the tip shape of the insertion part of a substrate cover. It is a figure explaining the other tip shape of the insertion part of a substrate cover.

The display device of the present invention will be described in detail below.
FIG. 1 is a cross-sectional view showing an example of the display device of the present invention.
The display panel DP is various flat display panels such as a liquid crystal display panel and an organic electroluminescence display panel. The display panel DP is disposed and held at a predetermined position of the frame member (lower frame) SF. When a display panel that selectively controls transmitted light, such as a liquid crystal display panel, is used as the display panel, a backlight is disposed inside the lower frame SF.

  A first circuit board CB1 provided with a connector CN having a connector locking mechanism is disposed on the side surface of the display device of the present invention, particularly on the side surface of the lower frame SF. Further, another second circuit board CB2 is disposed on the back surface of the lower frame SF. The first circuit board CB1 is a circuit board that can be disposed on the side surface of the display device such as the drain PCB described above, and the second circuit board CB2 can be disposed on the back surface side of the display device such as the TCON substrate described above. It is a circuit board.

  The display panel DP and the first circuit board CB1 are connected by a flexible printed wiring board FPC with a driver IC mounted thereon. The first circuit board CB1 and the second circuit board CB2 are connected by a flexible printed wiring board, a flexible flat cable FFC, or the like. At least the first circuit board CB1 is provided with a connector CN for connecting an FFC or the like, and the connector is provided with a connector lock mechanism for mounting and fixing the FFC or the like.

  The display device of the present invention is provided with an upper frame UF that covers the side surface of the lower frame SF from the periphery of the display panel DP. Further, in order to protect the second circuit board CB2 disposed on the back side of the display device, the second circuit board is covered with a substrate cover BC formed of an insulating resin or the like.

  Further, a part of the substrate cover BC forms an insertion portion 1 that is inserted between the upper frame UF and the connector CN on the first circuit substrate CB. This insertion portion prevents the connector and the first circuit board CB from making electrical contact with the metal upper frame UF.

  A feature of the display device of the present invention is that the distal end shape of the insertion portion of the substrate cover BC is configured to be in contact with the connector lock mechanism 2 of the connector CN only locally as shown in FIGS.

  The specific shape of the distal end of the insertion portion is set so that the shape of the end portion of the insertion portion 1 is oblique with respect to the insertion direction A, as indicated by an arrow 10 in FIG. 2 that are the same as those in FIG. 1 are used for the same reference numerals.

  That is, in FIG. 2, the end portion of the insertion portion 1 of the board cover BC is inclined in the insertion direction (oblique with respect to the long side of the connector lock mechanism 2), and the distal end 10 of the insertion portion is locally attached to the connector lock mechanism 2. It is configured to touch only.

  With this configuration, even when the insertion portion 1 of the board cover BC is engaged with the connector lock mechanism 2 during insertion, or when the insertion portion 1 is further pushed, only one point at the end of the insertion portion contacts the connector lock mechanism. Also, the force received by the lock mechanism is small, and the lock mechanism does not come off. Further, even if the insertion portion 1 is forcibly pushed in the hooked state, the insertion portion can be inserted to the back without detaching the connector lock mechanism by sliding the cover upward with the diagonal shape.

  The distal end shape of the insertion portion is not limited to the one that is obliquely cut in a straight line as indicated by reference numeral 10 in FIG. 2, but a concave curve (arc) shape as indicated by reference numeral 11 in FIG. The end of the insertion portion is inserted in the insertion direction (see FIG. 3B), such as a convex curve (arc) shape as indicated by reference numeral 12 in FIG. Various settings can be made so as to be oblique to the upper direction. Further, as shown in FIG. 3D, the vicinity of the center of the insertion portion 1 can be formed in a convex shape.

  As another example of the distal end shape of the insertion portion, as shown in FIG. 4, the width S1 of the distal end portion is narrower than the width W1 of the connector lock mechanism 2 and is positioned on the connector CN when the board cover is installed. By setting the width S2 of the portion wider than the width W2 of the connector, the insertion portion can be configured to contact the connector lock mechanism only locally.

  Even if the shape of the distal end portion of the insertion portion 1 is parallel to the long side of the connector lock mechanism 2, as shown in FIG. 4, when the width S1 of the distal end portion is smaller than the width W1 of the connector lock mechanism, It is possible to reduce the force applied to the lock mechanism and to prevent the lock mechanism from being released. By setting the width S1 of the tip portion to be less than half of the width W1, preferably less than one third, even if the insertion portion 1 is hooked on the connector lock mechanism 2, the tip portion is deformed and slides on the lock mechanism. Thus, the insertion portion 1 is further inserted.

  As described above, the present invention provides a liquid crystal display device having a structure in which an insulating sheet is inserted in a gap between a circuit board on which a connector having a connector locking mechanism disposed on a side surface of the module is mounted and a frame combined therewith. The present invention is not limited to display devices, and can be applied to various display devices.

  As described above, according to the present invention, it is possible to prevent the release of the connector lock mechanism of the connector of the circuit board disposed on the side surface of the lower frame when the substrate cover is attached during the assembly operation of the display device. A display device in which defects are suppressed can be provided.

DESCRIPTION OF SYMBOLS 1 Board cover insertion part 2 Connector lock mechanism BC Board cover CB1 1st circuit board CB2 2nd circuit board CN Connector DP Display panel FFC Flexible flat cable FPC Flexible printed wiring board SF Lower frame (frame member)
UF upper frame

Claims (2)

A lower frame that holds the display panel;
A first circuit board provided with a connector having a connector locking mechanism is disposed on a side surface of the lower frame,
On the back surface of the lower frame, another second circuit board is disposed,
An upper frame covering a side surface of the lower frame from a peripheral portion of the display panel;
In a display device having a substrate cover that covers the second circuit board, and a substrate cover having an insertion portion for inserting a part of the substrate cover between the upper frame and the connector,
The shape of the insertion portion is such that the width of the tip portion is narrower than the width of the connector lock mechanism, and the width of the portion located on the connector when the board cover is installed is wider than the width of the connector. The display device is configured such that the shape of the distal end of the insertion portion is only locally in contact with the connector lock mechanism of the connector.   The display device according to claim 1, wherein the distal end shape of the insertion portion is set so that the shape of the end portion is inclined with respect to the insertion direction.

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