JP2009098385A - Liquid crystal module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal module capable of achieving cost reduction by making the conventional printed circuit board for mounting an operational switch for an electronic apparatus unnecessary and reducing the number of parts and the man-hour of assembling. <P>SOLUTION: The liquid crystal module comprises: a liquid crystal panel 6; a printed circuit board 9a arranged along one edge of the liquid crystal panel 6; a flexible printed circuit substrate 11a which mounts driver IC chips 10a thereon and is connected with the liquid crystal panel 6 and the printed circuit board 9a; and optical sheets 5a, 5b and a light source 3 arranged behind the liquid crystal panel 6, wherein the operational switch SW for the electronic apparatus into which the liquid crystal module is assembled is mounted on the printed circuit board 9a. The printed circuit board 9a used also as a substrate for mounting the operational switch, thereby, the substrate for mounting the operational switch is made unnecessary, and the number of parts and man-hours of assembling are reduced to achieve the cost reduction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid crystal module, and more particularly to an improved liquid crystal module so that a printed wiring board for mounting an operation switch of an electronic device in which the liquid crystal module is incorporated can be omitted.

  In an electronic apparatus such as a television in which a conventional liquid crystal module is incorporated, a printed wiring board for mounting an operation switch of the electronic apparatus is provided separately from the main printed wiring board and the printed wiring board of the liquid crystal module.

On the other hand, a display device having a hard switch and a touch panel, comprising a control board for controlling the operation of the display device, a switch board for detecting an operation on the hard switch, and a cable for connecting them (Patent Document) 1), a display panel provided with an active matrix display region, a vertical drive circuit, and a horizontal aging circuit for supplying signals collectively to a plurality of source lines on the substrate of the liquid crystal display panel (Patent Document 2), or gate line drive A display device (Patent Document 3) in which a circuit is directly formed on a substrate and a signal line driving circuit is configured by a selection circuit directly formed on the substrate and a signal driving IC mounted on TCP is proposed. ing.
JP 2006-78547 A Japanese Patent Laid-Open No. 2002-40464 JP 2001-109435 A

  However, if a printed wiring board for mounting an operation switch of an electronic device is provided separately as in the prior art, there is a problem that the number of parts and the number of assembling steps increase correspondingly, leading to an increase in cost.

  On the other hand, the display devices and display panels disclosed in Patent Documents 1 to 3 are not intended to omit the printed wiring board on which the operation switch is mounted, and thus cannot solve the above problem.

  The present invention has been made under the above circumstances, and the problem to be solved is that a conventional printed wiring board for mounting an operation switch of an electronic device is not required, the number of parts and the number of assembly steps are reduced, and the cost is reduced. The object is to provide a liquid crystal module that can achieve down.

  In order to solve the above problems, the liquid crystal module according to the present invention has a printed wiring board disposed along one side of the liquid crystal panel, and connects the flexible wiring board on which the driver IC chip is mounted to the liquid crystal panel and the printed wiring board. In a liquid crystal module in which an optical sheet and a light source are disposed behind a liquid crystal panel, an operation switch of an electronic device in which the liquid crystal module is incorporated is mounted on the printed wiring board.

  In the liquid crystal module of the present invention, it is preferable that the operation switch can be operated by an operation button integrally formed in the cabinet of the electronic device. In particular, the printed wiring board is arranged along the upper side of the liquid crystal panel. It is preferable that the operation switch disposed and mounted on the printed wiring board can be operated with an operation button integrally formed on the top plate of the cabinet of the electronic device.

  The liquid crystal module of the present invention is incorporated into various electronic devices, and a typical electronic device is a television.

  Like the liquid crystal module of the present invention, when an operation switch is mounted on a printed wiring board that is arranged along one side of the liquid crystal panel and connected to the liquid crystal panel via a flexible wiring board on which a driver IC chip is mounted, A printed wiring board for mounting a conventional operation switch is not required, and the number of parts and the number of assembly steps are reduced accordingly, so that cost reduction can be achieved.

  And, since the operation switch can be operated with the operation button integrally formed in the cabinet of the electronic device, it is not necessary to separately attach the operation button to the cabinet, so that the number of parts and the number of assembly steps are further reduced. Further cost reduction can be achieved. In particular, when the operation switch is mounted on a printed wiring board arranged along the upper side of the liquid crystal panel and is configured to be operated with the operation button integrally formed on the top plate of the cabinet of the electronic device, the operation button is easy to see and press. Therefore, there is an advantage that the operability of the button is improved.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic exploded perspective view of a liquid crystal module according to an embodiment of the present invention, FIG. 2 is a schematic longitudinal sectional view of a flat panel television incorporating the liquid crystal module, and FIG. 4 is an enlarged partial sectional view showing a state in which the operation button of the cabinet of the flat-screen television is pushed with a fingertip, and FIG. 5 is an enlarged partial sectional view of another flat-screen television incorporating the liquid crystal module. .

  As shown in FIG. 1, the liquid crystal module includes main components such as a rear frame 1, a reflection sheet 2, cold cathode fluorescent lamps 3 and 3, resin frames 4 and 4, optical sheets 5a and 5b, a liquid crystal panel 6, and bezels 7 and 7. As shown in FIGS. 1 and 2, a reflection sheet 2 is provided inside a shallow box-shaped rear frame 1 having an open front surface, and the front side of the reflection sheet 2 is composed of components. Are provided with cold cathode tubes 3 and 3 bent in a U shape as a light source. These cold-cathode tubes 3 and 3 are connected to cables 8 and 8 with connectors so that the respective connectors 8a and 8a are taken out from the outlets 1a and 1a on one side wall of the rear frame 1 to the outside. It has become.

  Two L-shaped resin frames 4 and 4 are attached to the opening edge of the front surface of the rear frame 1 in a square frame shape, and a light diffusing plate is used as an optical sheet on the resin frames 4 and 4. Four peripheral edges of 5a and light diffusion sheet 5b are placed. Then, the liquid crystal panel 6 is overlaid on the optical sheets 5a and 5b, and the four peripheral edges of the liquid crystal panel 6 are pressed by the two L-shaped bezels 7 and 7 combined in a rectangular frame shape, and dropped off. It is attached so as not to.

  As shown in FIGS. 1 and 2, a rectangular printed wiring board 9a is disposed along the upper side of the liquid crystal panel 6. The printed wiring board 9a and the liquid crystal panel 6 have a driver IC chip 10a (source A plurality of flexible wiring boards 11a mounted with a driver IC chip) are connected. As shown in FIG. 2, the printed wiring board 9a is taken out above the side wall 1b on the upper side of the rear frame 1 by bending the flexible wiring board 11a at a right angle, and a support piece protruding from the side wall 1b. It is fixed to 1c.

  A rectangular printed wiring board 9b is also arranged along one side of the liquid crystal panel 6. A driver IC chip 10b (gate driver IC chip) is also provided on the printed wiring board 9b and the liquid crystal panel 6. A plurality of mounted flexible wiring boards 11b are connected. The printed wiring board 9b is taken out of the side wall on one side of the rear frame 1 and fixed to the support piece in the same manner as described above.

  A plurality of operation switches SW of a television in which the liquid crystal module is incorporated are mounted side by side on the printed wiring board 9a taken out above the side wall 1b on the upper side of the rear frame 1 and fixed to the support piece 1c. Wiring for inputting a power supply and a switch signal is additionally formed. As shown in FIG. 2, a plurality of operation buttons 13 for operating the respective operation switches SW are integrally formed on the top panel 12a of the television cabinet 12 in which the liquid crystal module is incorporated. In FIG. 2, reference numeral 15 denotes a main printed wiring board attached along the back surface of the rear frame 1 of the liquid crystal module.

  As shown in FIGS. 3 and 4, the operation button 13 is formed integrally with a plurality of spring pieces 13a by making comb-shaped cuts in the top plate 12a of the synthetic resin cabinet, and each spring piece 13a. As shown in FIG. 4, when the spring piece 13a is pushed with a fingertip, the operation switch SW can be operated by the convex portion 13b.

  When the operation switch SW is mounted on the printed wiring board 9a arranged and connected along the upper side of the liquid crystal panel 6 as in the above liquid crystal module, a printed wiring board for mounting a conventional operation switch becomes unnecessary. Since the number of parts and the number of assembly steps are reduced by that amount, cost reduction can be achieved. When the operation button 13 for operating the operation switch SW is integrally formed on the top plate 12a of the cabinet 12, it is not necessary to attach an operation button separately, and thus the increase in the number of parts and the number of assembly steps can be suppressed. In addition, since the operation buttons 13 formed on the top plate 12a of the cabinet are easy to see and press, the operability of the buttons is improved.

  In the above liquid crystal module, the operation button 13 is integrally formed with the cabinet top plate 12a. However, as shown in FIG. 5, the operation button 14 is directly fixed to the operation switch SW, and the operation button 14 is connected to the cabinet top plate 12a. The operation button 14 may be pushed by protruding from the hole, or the operation button 14 may be attached to the hole of the cabinet top plate 12 without being directly fixed to the operation switch SW. . However, in the case where the operation button 14 is prepared and fixed to the operation switch SW or attached to the hole of the cabinet top plate 12 in this way, the number of parts and the number of assembling steps are increased, resulting in an increase in cost. .

  The operation switch SW may be mounted on the printed wiring board 9b arranged and connected along one side of the liquid crystal panel 6. In this case, the operation button 13 is formed on the side plate of the cabinet 12. Therefore, it becomes difficult to see the operation button 13, which is not preferable.

1 is a schematic exploded perspective view of a liquid crystal module according to an embodiment of the present invention. It is a schematic longitudinal cross-sectional view of the thin-screen television incorporating the same liquid crystal module. It is a perspective view of the part which integrally formed the operation button of the cabinet of the same thin television. It is an expanded fragmentary sectional view which shows the state which pushed the operation button of the cabinet of the same thin television with a fingertip. It is an expanded partial sectional view of the other thin-screen television incorporating the same liquid crystal module.

Explanation of symbols

1 Rear frame 2 Reflecting sheet 3 Cold cathode tube (light source)
5a Light diffusion plate (optical sheet)
5b Light diffusion sheet (optical sheet)
6 Liquid crystal panel 9a, 9b Printed wiring board 10a, 10b Flexible wiring board 10a Driver IC chip (source driver IC chip)
10b Driver IC chip (Gate driver IC chip)
11a, 11b Flexible wiring board 12 Cabinet 12a Top plate 13 Operation button SW integrally formed on the top plate of the cabinet SW Electronic device operation switch

Claims (4)

A liquid crystal module in which a printed wiring board is arranged along one side of a liquid crystal panel, a flexible wiring board on which a driver IC chip is mounted is connected to the liquid crystal panel and the printed wiring board, and an optical sheet and a light source are arranged behind the liquid crystal panel. In
A liquid crystal module, wherein an operation switch of an electronic device in which the liquid crystal module is incorporated is mounted on the printed wiring board.   The liquid crystal module according to claim 1, wherein the operation switch is operated with an operation button integrally formed in the cabinet of the electronic device.   The printed wiring board is arranged along an upper side of the liquid crystal panel, and an operation switch mounted on the printed wiring board is operated by an operation button integrally formed on a top plate of a cabinet of the electronic device. The liquid crystal module according to claim 1 or 2.   The liquid crystal module according to claim 1, wherein the electronic device is a television.

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