BRIEF DESCRIPTION OF THE DRAWINGS
The foregoing aspects and many of the accompanying advantages of this invention will become more readily appreciated as the same becomes better understood by reference to the following detailed description, when taken in conjunction with the accompanying drawings, wherein:
FIG. 1 is the cross-sectional view of frame with the parts of LCD panel;
FIG. 2 is the structure of the FPD in accordance with an embodiment of the present invention;
FIG. 3 is the structure of the backlight module in accordance with the FIG. 2;
FIG. 4 is the top view of FIG. 3;
FIG. 5A is the cross sectional view of the AA′ line of FIG. 4; and
FIG. 5B shows the supporting rack bearing the stress force and the whole inclined plane contacting to the optical film in accordance with an embodiment of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
FIG. 2 is the structure of the FPD in accordance with an embodiment of the present invention. For an FPD, a backlight module 20 provides the FPD with light source needed. A panel module 30 processes the light source to display various images. A fixing frame 40 combines backlight module 20 and panel module 30 and holds them together.
FIG. 3 is the structure of the backlight module in accordance with the FIG. 2. A light source 21 is positioned at the bottom of the backlight module 20 and a light guide plate 23 is placed on the light source 21. A frame 27 may fix whole assembly of the backlight module 20, wherein an optical film 22 is below the light guide plate 23 and a plurality of optical films 24, 25, and 26 are on the upside of light guide plate 23.
FIG. 4 is a bottom view of FIG. 3. A frame 222 with geometric pattern is placed on the back of optical film 22, and another side of the frame 222 is toward the inside of the FPD's cover (not shown).
FIG. 5A is a cross sectional view of the A-A′ line of FIG. 4 illustrating a supporting rack 223 in accordance with one embodiment of the present invention. The inside of the FPD's cover 50 contacts with the supporting rack 223, which is a portion of the frame 222 with geometrical pattern. The supporting rack 223 has an inclined plane and contacts with the optical film 22 with an angle θ that makes a space between the supporting rack 223 and the optical film 22, wherein the angle θ is from about 1 degree to about 45 degree. In addition, the other side of optical film 22 is disposed with the light guide plate 23, optical films 24, 25 and 26, wherein the optical film 22 is a reflector. And the panel module 30 contacts with the optical film 26.
According to the structure mentioned above, while exerting a stress force F from the cover 50 of the LCD panel, the stress force conveys to the supporting rack 223, as FIG. 5B shows that the supporting rack 223 will bear the stress force F and the whole inclined plane contacts to the optical film 22. Because the contacted area increases, the pressure per unit area decreases. The supporting rack 223 with angle θ offers better supporting strength in order to bear more stress force and prevent the displaying quality of the FPD from black gap or some defects.
Furthermore, the supporting rack 223 is a portion of frame and made of elastic material, plastic, glue or engineering polymers, such as PC (Polycarbonate), PC+GF (Glass Fiber), PC+ABS (Acrylonitrile-Butadiene-Styrene copolymer). Utilizing this structure of supporting rack 223 to buffer the stress between the back light module and the FPD cover and may absorb the external force transferred from outside of the FPD cover. The invention makes whole FPD firmer than conventional way and prevents it from damage.
In addition, the FPD has a back light module with the light source that could be some cold-cathode fluorescent lamps (CCFL) or some light emitting diodes (LED). Besides, other FPD's applications, such as Plasma Display Panel (PDP), may use the present invention to protect the display panel in same fashion.
Accordingly, the present invention provides a frame structure for stress dispersion in the FPD having a supporting rack that has a tangent plane with an oblique angle. When the external force increases, the supporting rack deforms the tangent plane to contact to the back light module and to increase contact area. Under this situation, the angle is getting smaller accordingly.
Although the present invention has been explained in relation to its preferred embodiment, it is to be understood that other modifications and variation can be made without departing the spirit and scope of the invention as hereafter claimed.
Patent Application
20080062722
