TWI399593B - The bottom wall has a mountain-shaped structure of the straight type backlight module - Google Patents

Description

Straight-type backlight module with a mountain-shaped structure on the bottom wall

The invention relates to a direct type backlight module, in particular to a direct type backlight module having a mountain-shaped structure with a bottom wall.

Referring to FIG. 1, a cross-sectional view of a conventional direct type backlight module is shown. The direct type backlight module 1 includes a bottom wall 11 , at least two side walls 12 , a bottom reflective layer 13 , two side reflection layers 14 , and a plurality of lamps 15 . The side walls 12 extend outwardly from the edge of the bottom wall 11 and are at an angle of 90 degrees with the bottom wall 11. The side walls 12 and the bottom wall 11 form an accommodation space 16.

The bottom reflective layer 13 is located on the bottom wall 11. The side reflective layers 14 are located on the side walls 12. The bottom reflective layer 13 and the side reflective layers 14 are used to reflect the light emitted by the tubes 15. The lamps 15 are located in the accommodating space 16, and the tubes 15 are cold cathode fluorescent tubes (CCFLs). There is a spacing between each of the two lamps 15 and the spacing is the same. The distance between the lamps 15 and the bottom wall 11 is the same, that is, the tubes 15 are all at the same horizontal position.

The disadvantage of the conventional direct type backlight module 1 is that the brightness is not good, so the number of the lamps 15 required is large, especially when the size of the backlight module 1 is larger, the required lamp tube 15 is required. The greater the number, the higher the cost of the backlight module 1.

Therefore, it is necessary to provide an innovative and progressive direct-lit backlight module having a mountain-shaped bottom wall to solve the above problems.

The invention provides a direct type backlight module having a mountain-shaped structure with a bottom wall, which comprises a bottom wall, two side walls, a plurality of lamps and at least one mountain structure. The bottom wall has at least one edge. The side walls extend upward from the edge of the bottom wall. The mountain-shaped structure is located at a set position of the bottom wall, and the mountain-shaped structure has two inclined surfaces for reflecting the light emitted by the lamps relative to the position between the two lamps. Therefore, the brightness of the direct type backlight module is higher than that of the conventional direct type backlight module by increasing the arrangement of the mountain-shaped structures, so that the number of the lamps can be effectively reduced, thereby reducing the cost of the backlight module.

Referring to FIG. 2 and FIG. 3, a perspective view and a cross-sectional view of a first embodiment of the direct type backlight module of the present invention are respectively shown. The direct type backlight module 2 includes a bottom wall 21, at least two side walls 22, a bottom reflective layer 23, two side reflection layers 24, a plurality of lamps 25, and at least one mountain structure 26. The bottom wall 21 has at least one edge. The side walls 22 extend outwardly and upwardly from the edge of the bottom wall 21 and have an angle β greater than 90 degrees with the bottom wall 21 . The side walls 22 and the bottom wall 21 form an accommodation space 27 .

The bottom reflective layer 23 is located on the bottom wall 21. The side reflective layers 24 are located on the side walls 22. The bottom reflective layer 23 and the side reflective layers 24 are used to reflect the light emitted by the tubes 25. The lamps 25 are located in the accommodating space 27. Preferably, the tubes 25 are cold cathode fluorescent tubes (CCFLs). The bottoms of the lamps 25 are spaced apart from the bottom wall 21, that is, the lamps 25 are not attached to the bottom wall 21.

The mountain-shaped structure 26 is located at a set position of the bottom wall 21, and is opposite to The position between the two lamps 25 in the middle. The mountain structure 26 has two slopes 261 for reflecting the light emitted by the tubes 25. The angle α of the inclined faces 261 is 30 degrees to 150 degrees. In the present embodiment, the mountain-shaped structure 26 is in the shape of a triangular prism which is adhered to the bottom wall 21 or the bottom reflective layer 23. The length of the chevron 26 is less than the length of the tubes 25. The height of the mountain structure 26 is greater than one third of the outer diameter of the tubes 25, that is, the mountain structure 26 is not the microstructure of the bottom wall 21 or the bottom reflective layer 23, and the mountain structure 26 is only located at a specific The position is not over the entire bottom wall 21 or extends to be equal to the length of the tubes 25. The horizontal position of the top of the mountain structure 26 is lower than the top of the lamps 25, that is, the mountain structure 26 does not protrude (exceed) the lamps 25, and therefore, when the direct type backlight module 2 When a diffuser plate (not shown) is placed over, the mountain structure 26 does not contact (abut) the diffuser. In the present embodiment, the slope 261 of the mountain-shaped structure 26 can be used to reflect the light emitted obliquely downward from the lamps 25.

In this embodiment, there are five mountain-shaped structures 26, the distribution of which is a mountain-shaped structure 26 located at the center, and the remaining four mountain-shaped structures 26 are respectively located at four corners. Therefore, two mountain-shaped structures 26 are located between the two lamps. The situation.

The advantage of the direct type backlight module 2 is that the brightness is high. Taking FIG. 2 and FIG. 3 as an example, the brightness of the direct type backlight module 2 is increased by about 6% compared with the conventional direct type backlight module 1 (FIG. 1) by increasing the arrangement of the mountain-shaped structures 26. Therefore, the design of the direct type backlight module 2 of the present invention can effectively reduce the number of the lamps, thereby reducing the cost of the backlight module 2.

Referring to FIG. 4, a second embodiment of the direct type backlight module of the present invention is shown. A schematic cross-sectional view. The direct type backlight module 3 of the present embodiment is substantially the same as the direct type backlight module 2 (FIG. 3) of the first embodiment, and differs only in the structure of the mountain-shaped structure 36. In the present embodiment, the mountain-shaped structure 36 is formed by bending a single body structure 36. The mountain-shaped structure 36 has two inclined surfaces 361, and each inclined surface 361 further extends from an extending portion 362. The mountain-shaped structure 36 is adhered to the bottom wall 21 or the bottom reflective layer 23 by the extensions 362. The angle α of the inclined faces 361 is 30 degrees to 150 degrees.

Referring to FIG. 5, a cross-sectional view showing a third embodiment of the direct type backlight module of the present invention is shown. The direct type backlight module 4 of the present embodiment is substantially the same as the direct type backlight module 2 (FIG. 3) of the first embodiment, and differs only in the structure of the mountain-shaped structure 46, the bottom wall 21 and the bottom reflective layer 23. . In the present embodiment, the mountain-shaped structure 46 is formed by bending a single body structure 46. The mountain-shaped structure 46 has two inclined surfaces 461, and each inclined surface 461 further extends from an extending portion 462. The bottom wall 21 has at least one first slot 211 , and the bottom reflective layer 23 has at least one second slot 231 , and the first slot 211 is directly below the second slot 231 . The extension portion 462 of the mountain-shaped structure 46 is inserted into the first slot 211 of the bottom wall 21 and the second slot 231 of the bottom reflection layer 23 such that the mountain-shaped structure 46 is engaged with the bottom wall 21. The angle α of the inclined faces 461 is 30 degrees to 150 degrees.

Referring to FIG. 6, a cross-sectional view of a fourth embodiment of the direct type backlight module of the present invention is shown. The direct type backlight module 5 of the present embodiment is substantially the same as the direct type backlight module 4 (FIG. 5) of the third embodiment, and differs only in the position of the mountain-shaped structure 46. In the present embodiment, the extension 462 of the mountain-shaped structure 46 is located between the bottom reflective layer 23 and the bottom wall 21. Therefore, the bottom Wall 21 does not require any slots to be opened.

Referring to FIG. 7, a cross-sectional view of a fifth embodiment of the direct type backlight module of the present invention is shown. The direct type backlight module 6 of the present embodiment is substantially the same as the direct type backlight module 2 (FIG. 3) of the first embodiment, and differs only in the structure of the side wall 52. The side wall 52 has a first portion 521 and a second portion 522. The first portion 521 has a first angle γ1 with the bottom wall 21, and the second portion 522 has a second angle γ2 with the first portion 521. In this embodiment, the first angle γ1 is greater than 90 degrees, and the second angle γ2 is between 150 degrees and 180 degrees. Due to the bent design of the side wall 52, the direct type backlight module 5 can be increased by about 9%.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the scope of the present invention. The scope of the invention should be as set forth in the appended claims.

1‧‧‧Study direct backlight module

2‧‧‧First embodiment of the direct type backlight module of the present invention

3‧‧‧Second embodiment of the direct type backlight module of the present invention

4‧‧‧ Third embodiment of the direct type backlight module of the present invention

5‧‧‧Fourth embodiment of the direct type backlight module of the present invention

6‧‧‧Fourth embodiment of the direct type backlight module of the present invention

11‧‧‧ bottom wall

12‧‧‧ side wall

13‧‧‧Bottom reflective layer

14‧‧‧Side reflection layer

15‧‧‧Light tube

16‧‧‧ accommodating space

21‧‧‧ bottom wall

22‧‧‧ side wall

23‧‧‧ bottom reflective layer

24‧‧‧Side reflection layer

25‧‧‧Light tube

26‧‧‧ mountain structure

27‧‧‧ accommodating space

36‧‧‧ Yamagata structure

46‧‧‧ mountain structure

52‧‧‧ side wall

211‧‧‧ first slot

231‧‧‧Second slotting

261‧‧‧Bevel

361‧‧‧Bevel

362‧‧‧Extension

461‧‧‧Bevel

462‧‧‧Extension

521‧‧‧Part 1

522‧‧‧Part II

1 is a schematic cross-sectional view showing a conventional direct type backlight module; FIG. 2 is a perspective view showing a first embodiment of the direct type backlight module of the present invention; and FIG. 3 is a view showing a first embodiment of the direct type backlight module of the present invention. FIG. 4 is a cross-sectional view showing a second embodiment of the direct type backlight module of the present invention; FIG. 5 is a cross-sectional view showing a third embodiment of the direct type backlight module of the present invention; 6 is a cross-sectional view showing a fourth embodiment of the direct type backlight module of the present invention; and FIG. 7 is a cross-sectional view showing a fifth embodiment of the direct type backlight module of the present invention.

2‧‧‧First embodiment of the direct type backlight module of the present invention

21‧‧‧ bottom wall

22‧‧‧ side wall

23‧‧‧ bottom reflective layer

24‧‧‧Side reflection layer

25‧‧‧Light tube

26‧‧‧ mountain structure

27‧‧‧ accommodating space

261‧‧‧Bevel

Claims (13)

A direct type backlight module having a mountain-shaped structure, comprising: a bottom wall having at least one edge; and two side walls extending upward from an edge of the bottom wall; the plurality of lamps having a bottom spaced from the bottom wall by a distance And at least one mountain-shaped structure, located at a set position of the bottom wall, and opposite to the position between the two lamps, the mountain-shaped structure has two inclined surfaces for reflecting light emitted by the lamps, wherein the mountain shape The horizontal position of the top of the structure is lower than the top of the tubes. The direct-lit backlight module of claim 1, wherein the lamps are cold cathode fluorescent tubes (CCFLs). The direct type backlight module of claim 1, wherein the mountain-shaped structure is a triangular prism shape. The direct type backlight module of claim 1, wherein the mountain-shaped structure is adhered to the bottom wall. The direct type backlight module of claim 1, wherein the mountain-shaped structure is engaged with the bottom wall. The direct-lit backlight module of claim 1, wherein the mountain-shaped structure is a one-piece structure, each slope of the mountain-shaped structure further extending an extension portion, the bottom wall further having at least one slot, and the extension of the slope portion The slot is inserted into the bottom wall. The direct type backlight module of claim 1, wherein the length of the mountain-shaped structure is smaller than the length of the lamps. The direct type backlight module of claim 1, wherein the height of the mountain structure The system is greater than one third of the outer diameter of the tubes. The direct-lit backlight module of claim 1, wherein the two lamps have at least two mountain-shaped structures. The direct type backlight module of claim 1, wherein the angle of the inclined surfaces of the mountain-shaped structure is 30 degrees to 150 degrees. The direct type backlight module of claim 1, wherein each side wall has a first portion and a second portion, the first portion has a first angle with the bottom wall, and the second portion has a second portion with the first portion Angle. The direct type backlight module of claim 11, wherein the first angle is greater than 90 degrees. The direct type backlight module of claim 11, wherein the second angle is between 150 degrees and 180 degrees.