JP4877799B2 - Liquid crystal display - Google Patents

Description

  The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device having a backlight on the back of a liquid crystal display panel and modularizing them.

The liquid crystal display panel includes a pair of transparent substrates arranged opposite to each other with liquid crystal as an envelope, and includes a large number of pixels in the spreading direction of the liquid crystal.
In each pixel, the liquid crystal is controlled by an electric field that is independently generated in those portions, whereby the light transmittance is changed.
For this reason, a backlight is usually disposed on the back surface of the liquid crystal display panel, and is configured as a module together with other electronic components.
In this case, a liquid crystal display panel and a backlight are stacked, and these are covered from above and below by an upper frame and a lower frame, respectively, and these frames are engaged.
The upper frame is provided with an opening at a position corresponding to the liquid crystal display portion of the liquid crystal display panel, and an image on the liquid crystal display portion is observed through this opening.

The liquid crystal display device having such a configuration has been devised so far to improve the mechanical strength of the module and to improve the so-called framed frame.
Here, the frame means an area between the outline of the outer frame of the upper frame and the outline of the opening. By configuring this area to be narrow, the area of the liquid crystal display section is the same even in a liquid crystal display device of the same size. Can be increased.
The present invention has been made based on such circumstances, and it is an object of the present invention to provide a liquid crystal display device in which mechanical strength is further improved.
Another object of the present invention is to provide a liquid crystal display device that is further improved in the frame shape.

Of the inventions disclosed in the present invention, the outline of typical ones will be briefly described as follows.
That is, the liquid crystal display device according to the present invention includes, for example, a liquid crystal display panel, a printed circuit board disposed at a part of the periphery of the liquid crystal display panel, and a middle frame that positions the liquid crystal display panel and supports the printed circuit board. A backlight disposed on the back surface of the liquid crystal display panel, and a control circuit substrate disposed on the back surface of the backlight, and a part of the back surface of the printed circuit board is exposed on a portion of the middle frame. A notch is provided, and the wiring from the control circuit board is connected to the back surface of the printed board through the notch in the frame.
In the liquid crystal display device configured as described above, it is not necessary to bypass the extended end of the flexible substrate between the middle frame and the upper frame and to connect it on the surface of the printed circuit board. Accordingly, the upper frame and the middle frame can be configured to be in close contact with each other, and the frame can be narrowed.

  As is apparent from the above description, according to the liquid crystal display device according to the present invention, it is possible to further improve the mechanical strength and further improve the frame shape.

Embodiments of a liquid crystal display device according to the present invention will be described below with reference to the drawings.
FIG. 2 is an exploded perspective view of a liquid crystal display device (module) according to the present invention.
In the figure, an upper frame UFR, a liquid crystal display panel PNL, an intermediate frame MFR, an optical sheet material SPB such as a diffusion plate, and a lower frame DFR that also serves as a part of a backlight BL are sequentially laminated, and the upper frame UFR Is fixed to the lower frame DFR to hold the optical sheet material SPB such as the liquid crystal display panel PNL, the middle frame MFR, and the diffusion plate therebetween.
Hereinafter, these members will be sequentially described.

<< Upper frame UFR >>
The upper frame UFR is composed of a metallic rectangular frame for providing a shielding function, and has an opening (display window) LCW that exposes a liquid crystal display portion of a liquid crystal display panel described later.
A claw FK for engaging with a lower frame DFR described later is formed on the side wall surface of the frame.

<< Liquid Crystal Display Panel PNL >>
The liquid crystal display panel PNL includes a pair of transparent substrates arranged opposite to each other with liquid crystal as an envelope, and includes a liquid crystal display unit including a large number of pixels in the liquid crystal spreading direction.

  As shown in FIG. 3, the liquid crystal display unit extends in the y direction on the liquid crystal side surface of one transparent substrate SUB1 and gate signal lines GL extending in the x direction and arranged in parallel in the y direction. Drain signal lines DL arranged in parallel in the x direction are formed, and a region surrounded by these signal lines is a pixel region (for example, a region surrounded by a dotted frame indicated by A in the figure).

Each pixel region has a thin film transistor TFT that is operated by a scanning signal from one side gate signal line GL, and a pixel electrode PIX to which a video signal is supplied from one side drain signal line DL via the thin film transistor TFT. is doing.
The pixel electrode PIX generates an electric field between the pixel electrode PIX and the counter electrode formed on the one transparent substrate SUB1 side or the other transparent substrate SUB2 side, and the light transmittance of the liquid crystal is controlled by the electric field. Yes.

  The transparent substrate SUB2 is fixed to the transparent substrate SUB1 by a sealing material SL that also encloses liquid crystal, and one end of the gate signal line SL and the drain signal line DL is extended beyond the sealing material SL so that a terminal portion is formed. Is formed.

As shown in the plan view of FIG. 4, the liquid crystal display panel PNL is provided with a belt-like printed circuit board PCB in the periphery thereof, and a plurality of semiconductors are formed so as to crotch the printed circuit board PCB and the liquid crystal display panel PNL. A device CH is mounted.
This semiconductor device CH constitutes a scanning signal drive circuit in each semiconductor device CH arranged in parallel in the y direction in the figure, and constitutes a video signal drive circuit in each semiconductor layer CH arranged in parallel in the x direction in the figure. Yes.

  That is, a signal transmitted through the wiring layer and the electronic component formed on the printed circuit board PCB is input to the input terminal of each semiconductor device CH, and a scanning signal (from the scanning signal driving circuit) and video are output from the output terminal. A signal (from the video signal driving circuit) is output and transmitted to the gate signal line GL and the drain signal line DL in the liquid crystal display panel PNL, respectively.

  In general, a module in which the printed circuit board PCB and the semiconductor device CH are modularized on the liquid crystal display panel PNL is referred to as a liquid crystal display panel module. In this specification, this may be referred to as a liquid crystal display panel for convenience. In this case, the semiconductor device CH itself may be mounted on the transparent substrate SUB1 of the liquid crystal display panel PNL.

《Medium frame MFR》
The middle panel MFR is composed of a resinous frame positioned around the liquid crystal display panel module. The liquid crystal display panel PNL is positioned and placed, and the printed circuit board PCB is substantially the same as the liquid crystal display panel PNL. The semiconductor device CH has a function as a support material that does not generate unnecessary stress in the semiconductor device CH.
In the case of this embodiment, the middle frame MFR is formed with a plurality of holes from the front surface to the back surface, thereby reducing the weight of the middle frame MFR, reducing internal stress of the middle frame MFR, and the like. In particular, a relatively large hole 100 made of a long hole is formed in the middle frame on the printed circuit board PCB side to be connected to the video signal driving circuit.
The hole 100 is a place for supplying a signal to the printed circuit board PCB side, and is a space in which a connector mounted on the back surface of the printed circuit board PCB is positioned in the hole 100 portion.
Although the configuration of this part will be described in detail later, a signal from the TFT control circuit (T-con) board disposed on the back surface of the lower frame DFR is transmitted to the printed circuit board PCB via the flexible wiring board and the connector. I have to.
In addition, although it showed that this inside frame MFR was comprised with resin, it is needless to say that it is not limited to this and may process the metal plate.

<< Optical sheet material SPB such as diffusion plate >>
The optical sheet material SPB is made of, for example, a diffusion plate, and a prism sheet or the like may be used.
In some cases, a diffusion plate and a prism sheet are combined (laminated).
In any case, the optical sheet material SPB is a sheet that optically changes the light according to the purpose when the liquid crystal display panel PNL is irradiated with light from a backlight described later. Sheets having different properties are selected and one or more sheets are laminated and used.

<Lower frame>
As described above, the lower frame DFR also serves as a part (case) of the backlight BL. More precisely, the lower frame DFR also serves as a reflector that reflects light from the light source to the liquid crystal display panel PNL side. Yes.
That is, the lower frame DFR is composed of a box-shaped metal plate, and a plurality of cold cathode ray tubes FT serving as light sources are disposed therein.
In this embodiment, eight cold cathode ray tubes FT are used, which extend in the x direction in the drawing and are arranged in parallel at substantially equal intervals in the y direction.
The light from each cold cathode ray tube FT is reflected as it is or once on the surface of the lower frame DFR, passes through the optical sheet material SPB, and irradiates the back surface of the liquid crystal display panel PNL.
Incidentally, as shown in this configuration, a backlight BL in which a light source such as a cold cathode ray tube FT is arranged directly behind the liquid crystal display portion of the liquid crystal display panel PNL is referred to as a so-called direct type backlight.

As described above, the backlight BL having such a configuration is at least parallel to (or orthogonal to) the longitudinal direction of each cold-cathode ray tube FT among the side walls of the lower frame DFR that also serves as a reflector. ) Each side wall of the pair of sides is formed so as to be inclined with an obtuse angle with respect to the bottom surface. In other words, each side wall has an angle so as to expand as it approaches the liquid crystal display panel PNL.
This is because these side walls are surfaces to which a large amount of light from the cold cathode ray tube FT is irradiated (as compared to the surfaces of the other pair of side walls), and more reflected light is directed to the liquid crystal display panel PNL side.

FIG. 5 is a perspective view of the lower frame DFR having such a configuration as viewed from the back. The electrodes of each cold cathode ray tube FT are drawn out to the back surface of the lower frame DFR, and power is supplied from the back surface side of the lower frame DFR.
Further, the above-described TFT control circuit board COB is arranged on the back surface of the lower frame DFR, and the TFT control circuit board COB has an x-side edge (having inclined side walls). The video signal driving circuit is disposed close to the side on which the video signal driving circuit is mounted.

  The output of the TFT control circuit board COB is drawn out through the flexible wiring board FLB, and this flexible wiring board FLB extends along the inclined side wall toward the hole 100 formed in the middle frame MFR. ing. The extending end of the flexible wiring board FLB is electrically connected to the back surface of the printed circuit board PCB via, for example, a connector, so that a signal is transmitted to the printed circuit board PCB.

  In the above description, the lower frame DFR is made of a metal plate. However, the present invention is not limited to this and may be made of molded resin. In this case, it is desirable to dispose a reflector on the surface of the lower frame DFR made of resin on the cold cathode ray tube FT side or to perform a treatment such as coating of a reflective film.

  In addition, the lower frame DFR is configured to also serve as a part of the backlight BL, but is not limited thereto, and may be formed separately from the backlight BL. Needless to say.

<< Connection between Printed Circuit Board PCB and Flexible Wiring Board FLB >>
FIG. 1 is a cross-sectional view taken along the line II in FIG. 2, and shows a connection portion between the flexible printed circuit board FLB and the printed circuit board PCB connected to the TFT control circuit board COB.
The flexible wiring board FLB extends along an inclined side wall of the lower frame DFR so as to be directed to a hole 100 formed in the middle frame MFR.
On the other hand, a connector CNT fixed at the hole 100 portion of the back surface of the printed circuit board PCB supported by the middle frame MFR is attached.
The extending end of the flexible wiring board FLB is inserted into the connector CNT to achieve electrical connection.

  That is, a signal from the flexible printed circuit board FLB is transmitted to the back surface and the front surface of the printed circuit board PCB via the connector CNT (through a through hole formed in the printed circuit board PCB), and the semiconductor mounted on the surface of the printed circuit board PCB. The signal is input to the input terminal of the device CH.

  With this configuration, it is not necessary to bypass the extended end of the flexible substrate FLB between the middle frame MFR and the upper frame and connect it on the surface of the printed circuit board PCB.

Accordingly, the upper frame UFR and the middle frame MFR can be configured to be in close contact with each other, and the frame can be narrowed.
For this reason, the hole 100 formed in the middle frame 100 may be formed as a notch that does not have a side surface in a part thereof, instead of a shape in which the side surface is formed over the entire circumference.
That is, it suffices if a part of the back surface of the printed circuit board is exposed on a part of the middle frame. Therefore, in this specification, the hole 100 is defined as an embodiment of a notch.

In the above-described embodiment, the electrical connection between the flexible substrate FLB and the printed circuit board PCB is made through the connector CNT. However, the connector CNT is not necessary and the electrical connection is made. If it is, it is enough.
Needless to say, the signal from the flexible wiring board FLB may be transmitted only on the back surface of the printed circuit board PCB, that is, on the surface to which the flexible wiring board FLB is connected.

Example 2
The liquid crystal display device shown in Embodiment 1 uses a so-called direct type as the backlight BL. However, it goes without saying that the present invention can also be applied to a backlight using a so-called sidelight BL.

FIG. 6 is a perspective view showing a backlight BL called a sidelight. There is a light guide plate CLB made of, for example, a transparent resin plate disposed at least facing the liquid crystal display portion of the liquid crystal display panel PNL (not shown), and at least one side wall surface of the light guide plate CLB in the longitudinal direction of the side wall surface. And a linear light source composed of, for example, a cold cathode ray tube FT, and an arc-shaped reflection plate RFB that reflects light from the light source toward the side wall surface of the light guide plate CLB. Yes.
The light from the cold cathode ray tube FT is directly or reflected by the reflection plate RFB, is incident on the side wall surface of the light guide plate CLB, is reflected in the light guide plate CLB, and is irradiated from the surface on the liquid crystal display panel PNL side. It is like that.

FIG. 7 shows a cross-sectional view of a portion corresponding to FIG. 1 of a liquid crystal display device having such a backlight BL.
A flexible wiring board FLB connected to a TFT control circuit board COB (not shown) disposed on the back surface of the backlight BL extends toward a hole 100 formed in the middle frame MFR. The electrical connection with the back side of the printed circuit board PCB is the same as in the case of FIG.

  Further, FIG. 6 shows a configuration in which the flexible wiring board FLB is arranged on the cold cathode ray tube FT side, but it goes without saying that it may be arranged on the side where the cold cathode ray tube FT is not arranged. is there.

Example 3
In this embodiment, when the liquid crystal display device (module) described above is fixed to a member other than the module (for example, a decorative board), the configuration of the fixing portion of the module is shown.

FIG. 8A shows a backlight using a side light type, and a fixed portion FX is attached to the side wall surface of the middle frame MFR.
For example, one of the bolts and nuts is embedded as the fixing portion FX. However, it is of course possible to use tabs, screws or other binding materials.

  In this figure, unlike the case shown in FIG. 1, the upper frame UFR is not arranged up to the side wall of the middle frame MFR, but other parts (for example, the other side of the four sides of the upper frame). ) In the middle frame MFR.

  The liquid crystal display device (module) configured as described above has a configuration in which a fixing portion is provided in the middle frame MFR. Since the middle frame MFR has the function shown in the first embodiment, it is usually formed with a thickness larger than that of the upper frame UFR or the lower frame DFR, and the fixing portion FX is attached. Becomes easy.

  For example, when the same fixing portion is provided also in the upper frame UFR or the backlight BL, the number of fixing portions can be increased as a whole liquid crystal display device (module), Strong fixation can be achieved.

  Further, when compared with a configuration in which the backlight BL is provided with a fixing portion, the backlight BL can be eliminated or the number of fixing portions can be reduced. This can reduce the stress caused by the fixing portion of the backlight BL.

The sidelight-type backlight BL is configured to include a light guide plate CLB. However, according to the configuration of the present embodiment, distortion due to the stress on the light guide plate CLB can be reduced. In-plane reflectance and polarization characteristics are not adversely affected, and uneven brightness and uneven contrast can be eliminated.
FIG. 8A shows a case where the backlight BL is a sidelight type, but the same configuration can be applied to a direct type as shown in FIG. 8B.

Example 4
In this embodiment, the same effect as that of the third embodiment is obtained when the middle frame MFR has a relatively small thickness, for example, when formed by processing a metal plate.
That is, as shown in FIG. 9 (a), the same material or another material is fixed to the portion where the fixing portion FX is to be formed in the middle frame MFR so as to increase the thickness of the portion and its periphery. The fixing part FX is attached to that part.
Further, when the middle frame MFR is formed by processing a metal plate, an electrical short-circuit between each other is prevented by interposing an insulating material ISM at the contact portion between this and the liquid crystal display panel PNL.
FIG. 9A shows a side light type, and FIG. 9B shows a direct type liquid crystal display device.

Example 5 FIG.
This embodiment shows the relationship between the middle frame MFR and the lower frame DFR in the liquid crystal display device shown in FIG.
As shown in FIG. 10A (the same diagram as FIG. 8B), the portion where the fixed portion FX is formed in the middle frame MFR is a relatively large gap between the lower frame DFR. However, the portion where the fixing portion FX is not formed does not have a gap with the lower frame DFR.
In other words, the lower frame DFR is formed by extending the lower frame DFR sufficiently to the middle frame MFR side (so as not to deform the middle frame MFR) in order to enhance the mechanical strength of the middle frame MFR. The extending portion 200 is not provided in a portion where the fixing portion FX of the middle frame MFR is formed.
As shown in FIG. 10B, the extension part 200 of the lower frame DFR to the middle frame MFR is bent so as to have a large facing area on the side wall surface (side wall surface on the lower frame side) of the middle frame MFR. In addition, since the front end of the intermediate frame MFR extends to support the intermediate frame MFR, the mechanical strength of the intermediate frame MFR can be sufficiently improved.
In this embodiment, the liquid crystal display device of the direct type is shown, but it can be similarly applied to a side light type.

Example 6
In this embodiment, as shown in FIG. 11, the middle frame MFR has at least a surface (surface) on the side that supports the liquid crystal display panel PNL and a side wall surface. In the case of being formed in the “L” shape, the thickness of the middle frame MFR on the front surface side is reduced, and the thickness of the middle frame MFR on the side wall surface side is increased.
By reducing the thickness of the middle frame MFR on the front surface side, the thickness of the liquid crystal display device (module) can be reduced, and by increasing the thickness of the middle frame MFR on the side wall surface side, the middle frame of the fixed portion FX. Attachment to MFR can be strengthened.

Example 7
In this embodiment, when the side wall is formed so that the upper frame UFR sufficiently covers the side wall surface of the middle frame MFR, as shown in FIG. 12 (a) or FIG. A hole (notch) that sufficiently exposes the fixing portion FX is provided in a portion of the frame UFR that faces the mounting portion of the fixing portion FX of the frame MFR.
By forming the side wall so that the upper frame UFR sufficiently covers the side wall surface of the middle frame MFR, deformation of the middle frame MFR can be sufficiently prevented. Further, the hole (notch) allows a bonding material with other members other than the liquid crystal display device (module) to pass through without being obstructed by the upper frame UFR.

Example 8 FIG.
In this embodiment, in the liquid crystal display device (module), the backlight BL has a direct configuration, and the case (which may be a resin material or a metal material) is connected to other members other than the module. The fixing part FX is provided.

Here, the case of the backlight BL has a shape for housing a light source such as a cold cathode ray tube, and preferably the inner wall is processed to reflect light from the light source toward the liquid crystal display panel PNL. And is stronger in strength than the upper frame UFR or the lower frame DFR (except for the case of the backlight BL).
For this reason, providing the fixing portion FX in the case of the backlight BL enables reliable coupling with other members other than the module.

  Conventionally, a liquid crystal display device using a sidelight type backlight BL has been proposed in which a fixing portion FX is provided in a case of the backlight BL. However, when coupling with another member other than the module is performed via the fixing portion FX, stress due to the coupling is transmitted to the light guide plate CLB, causing distortion of the light guide plate CLB. The number is also limited, and the distortion may occur even when the number is reduced. On the other hand, the direct type backlight BL does not require the light guide plate CLB.

  For this reason, by adopting the above configuration, such inconvenience is eliminated, and the number of fixing portions FX can be increased. Also from this point, the connection between the liquid crystal display device (module) and other members than the module is achieved. It can be done reliably.

FIGS. 13A, 13 </ b> B, 14 </ b> C, 14 </ b> A, and 14 </ b> B are cross-sectional views illustrating a mode in which the fixing portion FX is formed in the case of the backlight BL.
In this embodiment, the case BLC is made of, for example, a molded resin material, and the side wall portion to which the fixing portion FX is attached is thicker than the other portions.

  FIG. 13A shows a configuration in which neither the upper frame UFR nor the middle frame MFR covers the side wall portion of the case BLC, and FIG. 13B shows only the upper frame UFR covers the side wall portion of the case. However, in the configuration in which a hole (notch) 300 having a sufficiently larger diameter than the fixed portion FX is formed at a location facing the fixed portion FX, FIG. 13C shows only the middle frame MFR of the case BLC. Although the side wall portion is covered, a hole (notch) 300 having a sufficiently larger diameter than the fixed portion FX is formed at a position facing the fixed portion FX.

FIG. 14A shows that both the upper frame UFR and the middle frame MFR cover the side wall portion of the case BLC, and are sufficiently more than the fixed portion FX at locations facing the fixed portions FX. A configuration in which a hole (notch) 300 having a large diameter is formed is shown.
Further, FIG. 14B shows a configuration in which the groove 400 is formed in the height direction on the side wall having a large thickness of the case BLC in each configuration described above.

  With this configuration, for example, when vibration or distortion occurs in the case BLC, conduction to the liquid crystal display panel PNL can be relaxed. Vibrations and distortions that occur in the case BLC are likely to occur during the manufacturing process of the liquid crystal display device, and it is possible to avoid the occurrence of an impact on the fitting portion of the liquid crystal display panel PNL with other members, the connection portion, and the semiconductor device CH.

Example 9
FIG. 15 is a configuration diagram of a backlight BL showing another embodiment of the liquid crystal display device according to the present invention, in which (a) is a side view and (b) is a plan view.
In this embodiment, as in the eighth embodiment, the backlight BL has a direct-type configuration, and the case (which may be a resin material or a metal material) BLC is fixed to the other member other than the module. FX is provided, but the formation part of the fixed portion FX is specified.

The direct type backlight BL has a plurality of line light sources arranged in parallel in a plane parallel to the liquid crystal display panel PNL, and the plane is at a relatively short distance from the liquid crystal display panel PNL.
For this reason, if the flat surface formed by each line light source is kept flat, light irradiation to the liquid crystal display panel PNL can be made uniform.

Therefore, depending on the position of the fixing portion FX of the case, the plane formed by each line light source placed on the bottom surface of the case of the backlight BL may be distorted due to the influence of stress from there.
In other words, when the bottom surface of the case is distorted, each line light source placed on the bottom surface impairs the flatness of the plane formed thereby.
Therefore, in this embodiment, the fixed portion FX is formed on the liquid crystal display panel PNL side with respect to the plane formed by each line light source, and is away from the bottom surface of the case.

  On the other hand, an optical sheet material SPB including a diffusion plate is usually disposed between the direct type backlight BL and the liquid crystal display panel PNL. The diffusion plate and the like are supported on the backlight BL side.

  For this reason, in order to minimize the influence on the diffusion plate due to the stress generated from the fixing portion FX, at least a pair of fixing portions FX are arranged with a plurality of line light source groups interposed therebetween.

Example 10
16 to 18 are configuration diagrams of a case BLC of a backlight BL showing another embodiment of the liquid crystal display device according to the present invention.
In this embodiment, a protrusion 500 is formed on the back side of a member (such as a case of the backlight BL) to which the fixing portion FX is attached, either integrally with the member or made of another member fixed to the member. The fixing portion FX is attached to the portion 500.
In the case of such a configuration, for example, the fixing portion FX is configured by a nut, and is configured by a bolt (screw) for coupling to a member other than the liquid crystal display device (module). Become.
Further, for example, when the case of the backlight BL is placed during work, the protrusion 500 does not directly contact the pedestal or the like on its back surface, and the adverse effects caused thereby can be avoided.

FIG. 16 shows the protrusions formed on the sidelight-type backlight BL and the fixing parts attached to the protrusions.
FIG. 17 shows the protrusion formed on the direct-type backlight BL and a fixing portion attached to the protrusion.
FIG. 18 shows a state in which, for example, when the TFT control circuit board COB is mounted on the back surface of the direct type backlight BL, the projection 500 can prevent the TFT control circuit board COB from being damaged due to short circuit or charging. It is a figure.
16 to 18, (a) shows a side view on the short side, and (b) shows a side view on the long side.

FIG. 3 is a main part configuration diagram showing an embodiment of a liquid crystal display device according to the present invention, which is a cross-sectional view taken along the line II of FIG. 2. 1 is an exploded perspective view showing an embodiment of a module of a liquid crystal display device according to the present invention. FIG. 3 is an equivalent circuit diagram showing an embodiment of a liquid crystal display panel of a liquid crystal display device according to the present invention. It is a top view which shows one Example of the liquid crystal display panel of the liquid crystal display device by this invention. It is the perspective view which looked at the module of the liquid crystal display device by the present invention from the back. It is a disassembled perspective view which shows the backlight called the sidelight which is one form of the backlight of the liquid crystal display device by this invention. It is principal part sectional drawing which shows the other Example of the liquid crystal display device by this invention. It is principal part sectional drawing which shows the other Example of the liquid crystal display device by this invention. It is principal part sectional drawing which shows the other Example of the liquid crystal display device by this invention. It is principal part sectional drawing which shows the other Example of the liquid crystal display device by this invention. It is principal part sectional drawing which shows the other Example of the liquid crystal display device by this invention. It is principal part sectional drawing which shows the other Example of the liquid crystal display device by this invention. It is principal part sectional drawing which shows the other Example of the liquid crystal display device by this invention. It is principal part sectional drawing which shows the other Example of the liquid crystal display device by this invention. It is a principal part block diagram which shows the other Example of the liquid crystal display device by this invention. It is principal part sectional drawing which shows the other Example of the liquid crystal display device by this invention. It is a principal part block diagram which shows the other Example of the liquid crystal display device by this invention. It is principal part sectional drawing which shows the other Example of the liquid crystal display device by this invention.

Explanation of symbols

  UFR ... upper frame, PNL ... liquid crystal display panel, MFR ... middle frame, BL ... backlight, DFR ... lower frame, PCB ... printed circuit board, CH ... semiconductor device, COB ... TFT control circuit board, FLB ... flexible board, CLB ... Light guide plate, FT ... Cold cathode ray tube, BLC ... Backlight case, FX ... Fixed part.

Claims (1)

A liquid crystal display panel, a direct type backlight disposed on the back surface of the liquid crystal display panel, an optical sheet material supported by the backlight and disposed between the liquid crystal display panel, and at least the members above In a liquid crystal display device having a module configured to be held between a frame and a lower frame,
The backlight is composed of a light source group including a plurality of light sources disposed on the liquid crystal display panel and in parallel to the virtual plane, a case for accommodating the light source group,
The case is formed with a fixing portion for coupling with a member other than the module, and at least a pair of the fixing portions are provided on the liquid crystal display panel side with respect to the virtual plane with the light source group interposed therebetween. A liquid crystal display device characterized by the above.

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