JP2009016190A - Backlight chassis of liquid crystal display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a backlight chassis of a liquid crystal display panel in which a lighting circuit part arranged at two places in the rear side is connected by a wire harness, in which the support work of the wire harness by a harness clamp is made with less labor. <P>SOLUTION: The backlight chassis 1 of a liquid crystal display panel 6 has a plurality of light source lamps 3 arranged on the front surface and lighting circuit parts 10L, 10R of the light source lamp 3 arranged at two separate places on the rear side. The wire harness 13 which connects the lighting circuit parts 10L, 10R is supported by a harness clamp 14 in the middle. At least a part of the harness clamp 14 is integrally formed with the backlight chassis 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a backlight chassis for a liquid crystal display panel.

  The backlight chassis of the liquid crystal display panel has a light source lamp group disposed on the front surface and a lighting circuit portion of the light source lamp group disposed on the back surface. At this time, if only one of the left and right ends of the light source lamp is connected to the lighting circuit unit, the brightness cannot be balanced on the left and right sides of the liquid crystal display panel. For this reason, lighting circuit sections are arranged at two positions on the left and right sides of the backlight chassis, and light source lamps connected at the left end to the left lighting circuit section and light source lamps connected at the right end to the right lighting circuit section are alternately arranged. , So that there is no difference in brightness between the left and right of the screen.

  A structural example of the liquid crystal display panel will be described with reference to FIGS. 6 is an exploded perspective view of the liquid crystal display device, FIG. 7 is a rear view of the backlight chassis, FIG. 8 is an enlarged front view of a clip that holds an intermediate portion of the light source lamp, and FIG. 9 is a portion of the backlight chassis according to the conventional structure. FIG. 10 is an enlarged cross-sectional view of the portion shown in FIG.

  In the exploded perspective view of FIG. 6, the components are arranged as an assembly of the liquid crystal display device so that the display surface faces upward. The backlight chassis 1 is located at the lowermost part, and the reflection sheet 2 is overlaid on the surface (upper surface), and a plurality of light source lamps 3 are arranged thereon. As the light source lamp for the backlight, a straight tubular cold cathode tube is generally used, but other types of lamps such as a hot cathode tube and a xenon lamp can also be used.

  On the lamp 3, an optical sheet group 4 such as a diffusion plate, a lens sheet, a polarization reflection sheet, and a diffusion sheet is disposed. The optical sheet group 4 is used to adjust the characteristics of light emitted from the light source lamp 3.

  The optical sheet group 4 is attached to the backlight chassis 1 by a frame-like frame 5. A liquid crystal display panel 6 is disposed on the frame 5. A frame-like bezel 7 is arranged on the uppermost stage. The bezel 7 plays a role of fixing the liquid crystal display panel 6 to the backlight chassis 1 and adjusting the appearance of the entire liquid crystal display device.

  The backlight chassis 1 has a rectangular shape in a planar shape and a tray shape with an edge rising around the periphery. The backlight chassis 1 has mounting portions 9 for sockets 8 that hold both ends of the light source lamp 3. The attachment portion 9 is a through hole having a predetermined shape, and two sockets 8 are inserted therein, and a plurality of attachment portions 9 are formed in a line along the short side of the backlight chassis 1. The socket 8 is electrically connected to lighting circuit portions (see FIG. 8) provided at two locations apart from the back surface (lower surface) of the backlight chassis 1.

  In FIG. 7, the lighting circuit portion located on the left side is referred to as a lighting circuit portion 10L, and the lighting circuit portion located on the right side is referred to as a lighting circuit portion 10R. The light source lamp 3 is alternately connected to the lighting circuit unit 10L connected at the left end and the light source lamp 3 connected to the lighting circuit unit 10R at the right end. This is to prevent a difference in brightness between the left and right sides of the screen as described above.

  The light source lamp 3 is long and rings when vibration is transmitted. In order to avoid this, the intermediate portion of the light source lamp 3 is fixed to the backlight chassis 1 with the clip 11. The structure of the clip 11 is shown in FIG. The clip 11 is provided with a C-shaped lamp holder 11b opened upward on the upper surface of a flat rectangular base 11a. The lamp holder 11b is elastic and holds the light source lamp 3. Two lamp holders are provided, one at each end in the longitudinal direction of the base 11a. On the lower surface of the base 11a, two snap pins 11c having a swelled head and a split groove are formed at intervals in the longitudinal direction of the base 11a. The clip 11 is integrally formed of a synthetic resin having elasticity as a whole.

  A mounting portion 12 for a clip 11 is formed on the backlight chassis 1 and the reflective sheet 2 attached to the upper surface thereof. A set of two through holes through which the snap pins 11c are passed constitutes one mounting portion 12. When the snap pin 11c is pressed against the mounting portion 12 from above, the swelled head of the snap pin 11c shrinks and passes through the hole. When the head of the snap pin 11c comes out on the lower surface of the backlight chassis 1, it springs back and swells, whereby the clip 11 is in an attached state.

  The light source lamp 3 is held by clips 11 at two intermediate positions. Since one clip 11 holds two light source lamps 3, attachment portions 12 are provided at two positions at intervals in the length direction of the light source lamp 3 with respect to a set of two light source lamps 3. become.

  The lighting circuit portions 10L and 10R are connected by a wire harness 13. Two wire harnesses 13 are provided.

  An intermediate portion of the wire harness 13 is held by a harness clamp 14 so that the wire harness 13 does not sag. Three harness clamps 14 are provided for one wire harness 13. As shown in FIGS. 9 and 10, the harness clamp 14 is composed of two parts. One of the two parts is a receiving portion 15, and the other one is a portal member 16. These are all formed of a synthetic resin having elasticity.

  The receiving portion 15 is fixed to the back surface of the backlight chassis 1 and has a dovetail groove 15a. The gate-shaped member 16 has a shape in which the gate is inverted in the state of FIG. 9, and has a T-shaped engaging portion 16a that engages with the dovetail groove 15a of the receiving portion 15 at the tip of one leg portion. An engaging piece 16b that engages with the through hole 17 of the backlight chassis 1 is provided at the tip of the other leg. If the wire harness 13 is sandwiched between the backlight chassis 1 and the gate-shaped member 16, the T-shaped engaging portion 16a is engaged with the dovetail groove 15a, and the engaging piece 16b is engaged with the through hole 17, the harness clamp The holding of the wire harness 13 by 14 is achieved.

As in the harness clamp described above, holding a wiring by some member is widely performed in electric machines and electronic machines. An example of this can be seen in US Pat.
JP 2004-39533 A

  When the lighting circuit section of the light source lamp group is arranged at two places on the back surface of the backlight chassis of the liquid crystal display panel and the lighting circuit section is connected with the wire harness, the holding of the intermediate portion of the wire harness is separated from the backlight chassis. If the body harness clamp is used, it is necessary to engage two places of the harness clamp with the backlight chassis. The fact that two engagement operations are required for one harness clamp means that the greater the number of harness clamps, the greater the effort required on the operator. Recent TV liquid crystal display panels have been increasing in size and the number of harness clamps has been increasing, and some effort to reduce labor is required. This invention is made | formed in view of this point, and it aims at enabling it to perform the operation | work which hold | maintains a wire harness with a harness clamp with little effort.

  In order to achieve the above object, the present invention provides a backlight chassis of a liquid crystal display panel in which a light source lamp group is arranged on the front surface and lighting circuit portions of the light source lamp group are arranged at two positions apart on the back surface. It is characterized in that at least a part of a harness clamp that holds an intermediate part of the wire harness connecting the two lighting circuit parts is integrally formed in the backlight chassis.

  According to this configuration, since at least a part of the harness clamp is integrally formed with the backlight chassis, the number of engagement operations required in the process of holding the wire harness with the harness clamp is reduced, and the labor of the operator is reduced. Speed up can be realized.

  According to the present invention, in the backlight chassis of the liquid crystal display panel having the above-described configuration, the harness clamp includes a portal member whose one end is integrally connected to the backlight chassis, and the portal mold that is integrally formed with the backlight chassis. It is characterized by comprising a receiving portion for receiving the free end of the other end of the member.

  According to this configuration, both the gate-shaped member and the receiving portion are obtained by integral molding into the backlight chassis, so that the manufacturing cost and the assembling cost can be reduced, and there is no possibility of losing parts.

  According to the present invention, in the backlight chassis of the liquid crystal display panel having the above-described configuration, the harness clamp includes a gate-shaped member whose one end is integrally connected to the backlight chassis, and the portal-shaped member fixed to the backlight chassis. It is characterized by comprising a receiving part of a separate part that receives the free end of the other end of the.

  According to this configuration, the gate-shaped member is obtained by integral molding into the backlight chassis, so that the manufacturing cost and the assembling cost can be reduced, and there is no risk of component loss.

  According to the present invention, in the backlight chassis of the liquid crystal display panel having the above-described configuration, the harness clamp is formed of a gate-shaped member that is integrally connected to both ends of the backlight chassis.

  According to this configuration, the gate-shaped member is obtained by integral molding into the backlight chassis, so that the manufacturing cost and the assembling cost can be reduced, and there is no risk of component loss. Further, since both ends of the gate-shaped member are integrally connected to the backlight chassis, sufficient strength can be obtained.

  According to the present invention, in the backlight chassis of the liquid crystal display panel configured as described above, the harness clamp is a dovetail groove formed integrally with the backlight chassis, and a gate of a separate part that is held by inserting one end into the dovetail groove. It is characterized by comprising a mold member.

  According to this configuration, the wire harness can be easily held by the portal member.

  According to the present invention, in the backlight chassis of the liquid crystal display panel having the above-described configuration, the harness clamp is formed of a C-shaped clip integrally formed with the backlight chassis.

  According to this structure, a wire harness can be hold | maintained only by inserting in a C-shaped clip, and a wire harness holding operation is remarkably speeded up.

  The present invention is also characterized in that the backlight chassis of the liquid crystal display panel having the above structure is made of synthetic resin.

  According to this structure, required elasticity can be given to a backlight chassis and a harness clamp.

  According to the present invention, the number of times of engaging work when holding the intermediate part of the wire harness connecting the lighting circuit parts arranged at two places on the back surface of the backlight chassis of the liquid crystal display panel with the harness clamp is reduced, and the labor of the operator is reduced. And speed up the work.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 5 are partial enlarged cross-sectional views of a backlight chassis similar to FIG. 9, and one figure corresponds to one embodiment. Constituent elements that are functionally common to the constituent elements in FIG. 9 are denoted by the same reference numerals as those used in FIG.

  In the first embodiment of FIG. 1, the gate-shaped member 16 and the receiving portion 15 are integrally formed with the backlight chassis 1. That is, the backlight chassis 1 is made of a synthetic resin, and the gate-shaped member 16 is integrally connected to the backlight chassis 1 at the end that is the engagement piece 16a in FIG.

  According to the structure of 1st Embodiment, both the gate-shaped member 16 and the receiving part 15 are obtained by integral molding to the backlight chassis 1, a manufacturing cost and an assembly cost can be reduced, and there is also no possibility of component loss.

  In the second embodiment of FIG. 2, the gate-shaped member 16 is integrally formed with the backlight chassis 1 by the method of the first embodiment, and the receiving part 15 as another component is fixed to the backlight chassis 1.

  According to the configuration of the second embodiment, the gate-shaped member 16 can be obtained by integral molding with the backlight chassis 1, and the manufacturing cost and the assembling cost can be reduced, and there is no risk of losing parts.

  In the third embodiment of FIG. 3, both ends of the gate-shaped member 16 are integrally connected to the backlight chassis 1. At least one end of the wire harness 13 is left unconnected to the lighting circuit unit 10, and the gate-shaped member 16 is passed through before connecting to the lighting circuit unit 10.

  According to the configuration of the third embodiment, the gate-shaped member 16 is obtained by integral molding with the backlight chassis 1, and the manufacturing cost and the assembling cost can be reduced, and there is no risk of component loss. Moreover, since both ends of the gate-shaped member 16 are integrally connected to the backlight chassis 1, sufficient strength can be obtained.

  In the fourth embodiment of FIG. 4, the harness clamp 14 is a separate part that is held by inserting a dovetail groove 15 a integrally formed in the backlight chassis 1 and a T-shaped engagement portion 16 a at one end into the dovetail groove 15 a. It consists of a gate-shaped member 16.

  According to the configuration of the fourth embodiment, the wire harness 13 can be easily held by the portal member 16.

  In the fifth embodiment of FIG. 5, the harness clamp 14 includes a C-shaped clip 18 that is integrally formed with the backlight chassis 1. In the C-shaped clip 18, the open side of the C shape faces the side opposite to the side where the backlight chassis 1 is located.

  According to the structure of 5th Embodiment, the wire harness 13 can be hold | maintained only by inserting in the C-shaped clip 18, and wire harness holding work is remarkably speeded up.

  Similar to the first embodiment, the backlight chassis 1 is also made of synthetic resin in the second to fifth embodiments. Thereby, required elasticity can be given to the backlight chassis 1 and the harness clamp 14.

  Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

    The present invention is widely applicable to a backlight chassis of a large liquid crystal display panel.

The partial expanded sectional view of the backlight chassis which shows 1st Embodiment The partial expanded sectional view of the backlight chassis which shows 2nd Embodiment The partial expanded sectional view of the backlight chassis which shows 3rd Embodiment The partial expanded sectional view of the backlight chassis which shows 4th Embodiment The partial expanded sectional view of the backlight chassis which shows 5th Embodiment Disassembled perspective view of liquid crystal display device Back view of backlight chassis Enlarged front view of the clip that holds the middle part of the light source lamp Partial enlarged sectional view of a backlight chassis according to a conventional structure Partial enlarged front view of the location of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Backlight chassis 2 Reflective sheet 3 Light source lamp 6 Liquid crystal display panel 10L, 10R Lighting circuit part 13 Wire harness 14 Harness clamp 15 Receiving part 15a Dovetail groove 16 Gate-shaped member 16a T-shaped engaging part 18 C-shaped clip

Claims (7)

In the backlight chassis of the liquid crystal display panel in which the light source lamp group is disposed on the front surface and the lighting circuit portion of the light source lamp group is disposed at two positions apart on the back surface,
A backlight chassis for a liquid crystal display panel, wherein at least a part of a harness clamp for holding an intermediate portion of a wire harness connecting the two lighting circuit portions is integrally formed with the backlight chassis. The harness clamp includes a portal member whose one end is integrally connected to the backlight chassis, and a receiving portion that is integrally formed with the backlight chassis and receives a free end of the other end of the portal member. The backlight chassis of the liquid crystal display panel according to claim 1. The harness clamp is composed of a gate-shaped member whose one end is integrally connected to the backlight chassis, and a separate receiving part that is fixed to the backlight chassis and receives the free end of the other end of the portal-shaped member. The backlight chassis of the liquid crystal display panel according to claim 1. The backlight chassis of the liquid crystal display panel according to claim 1, wherein the harness clamp is formed of a gate-shaped member whose both ends are integrally connected to the backlight chassis. 2. The liquid crystal display according to claim 1, wherein the harness clamp includes a dovetail groove formed integrally with a backlight chassis, and a separate gate-shaped member that is held by inserting one end into the dovetail groove. Panel backlight chassis. The backlight chassis of the liquid crystal display panel according to claim 1, wherein the harness clamp is formed of a C-shaped clip integrally formed with the backlight chassis. The backlight chassis of the liquid crystal display panel according to any one of claims 1 to 7, wherein the backlight chassis is made of a synthetic resin.

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