CN100388079C

CN100388079C - Backlight module

Info

Publication number: CN100388079C
Application number: CNB2005100813775A
Authority: CN
Inventors: 张哲志; 谢锦坤; 吴嘉容; 吴孟斋
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2005-06-28
Filing date: 2005-06-28
Publication date: 2008-05-14
Anticipated expiration: 2025-06-28
Also published as: CN1700069A

Abstract

The present invention discloses a back light module which comprises a light guide plate and a light source, wherein the light guide plate is provided with a first side edge and a second side edge connected with the first side edge; the second side edge is provided with a lug, a notch is formed between the lug and the elongation line of the first side edge, and the light source is arranged in the notch.

Description

Backlight module

Technical field

The present invention relates to a kind of backlight module, particularly relate to the backlight module of a kind of miniaturization and slimming.

Background technology

In the backlight module of general liquid crystal indicator, normally with cold cathode fluorescent lamp as light source, in recent years,, replace with small-sized light source such as light emitting diode gradually based on factors such as miniaturization and resistances to impact.

Fig. 1 is the existing synoptic diagram of light emitting diode as the backlight module of light source that utilize, in Fig. 1, backlight module 100 has three light emitting diodes 110 as light source, the light that light emitting diode 110 produced is led in the viewing area 122 of light guide plate 120 via the leaded light zone 121 of light guide plate 120, and label 130 is in order to support the support of light emitting diode 110 and light guide plate 120.

In order to reduce the quantity that is provided with of light emitting diode, another kind of backlight module is suggested, and shown in Fig. 2 a and Fig. 2 b, backlight module 200 has a light emitting diode 210 and a light guide plate 220; With reference to figure 2a, light emitting diode 210 is arranged at the corner of light guide plate 220, and the light that is produced is led in the viewing area 221 via

leaded light zone

222 and 223.

Yet because light emitting diode 210 is the corners that are set at light guide plate 220, this will make light guide plate 220 need at two sides the leaded light zone to be set, and increase the area of light guide plate; In addition, with reference to figure 2b, light emitting diode 210 is the belows that are set at light guide plate 220, and this will make the integral thickness of backlight module 200 increase, and can't reach purpose of thinness.

Summary of the invention

In view of this, the object of the present invention is to provide the backlight module of a kind of miniaturization and slimming.

According to the present invention, a kind of backlight module is provided, comprise a light guide plate and a light source, the light guide plate second side that has a first side and be connected wherein with the first side, and on the second side, be formed with a lug, and lug has an incidence surface; Light source is set up in the mode in the face of the incidence surface of lug, and the incidence surface of lug is connected with the second side.

In a preferred embodiment, light guide plate has an exiting surface, and has a plurality of patterns on exiting surface; Again, pattern density or the area away from the incidence surface of lug more is big more, and shape is to comprise linear, circular, oval, polygon, convex shape or invaginated type; In addition, the thickness of light guide plate near the incidence surface place of lug greater than incidence surface place away from lug.

Again, the incidence surface of lug can be a curved surface or part curved surface.

The incidence surface that will be appreciated that lug is not to be connected with the first side, and the shape of lug can be obtuse triangle; Again, light source and light guide plate are to be positioned on the same surface level, and light source can be a light emitting diode.

Again in the present invention, a kind of backlight module is provided, comprise a light guide plate and a light source, the light guide plate second side that has a first side and be connected wherein with the first side, on the second side, be formed with a lug, and form a breach between the extended line of lug and first side, light source then is arranged in the breach.

In a preferred embodiment, breach can be a curved surface or part curved surface in the face of the light source limit.

Again in the present invention, provide a kind of liquid crystal indicator, comprise above-mentioned backlight module and be arranged at a liquid crystal panel on the backlight module.

For above and other objects of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and cooperate appended icon, be described in detail below.

Description of drawings

Fig. 1 is a kind of synoptic diagram of existing backlight module;

Fig. 2 a and Fig. 2 b are the synoptic diagram of another kind of existing backlight module;

Fig. 3 a is the front schematic view of an embodiment of backlight module of the present invention;

Fig. 3 b is the side schematic view of the backlight module among Fig. 3 a;

Fig. 4 is the front schematic view of another embodiment of backlight module of the present invention; And

Fig. 5 a～Fig. 5 d is the synoptic diagram of variation of the incidence surface of light guide plate of the present invention.

Has embodiment

With reference to figure 3a, backlight module 1 of the present invention comprises a light guide plate 10 and a light source 20, will be appreciated that backlight module also comprises other elements such as reflecting plate and diffuser plate, but, omit its icon and related description at this because other elements such as reflecting plate and diffuser plate are identical with existing backlight module.

The second side 12 that light guide plate 10 has a first side 11 and is connected with first side 11, and on second side 12, be formed with a lug 13; Lug 13 has an incidence surface 13a, and and the extended line of first side 11 between form a breach 15; Again, light guide plate 10 has an exiting surface 16, shown in Fig. 3 b, and has a plurality of patterns (pattern) 14 on exiting surface 16.

Light source 20 is to be set in the breach 15 in the mode in the face of the incidence surface 13a of lug 13, and can be a light emitting diode; Again, as shown in Fig. 3 a, because the incidence surface 13a of lug 13 is connected with second side 12, rather than be connected with first side 11, making light source 20 thus is not the corner that is positioned at first side 11 and second side 12, and can be recessed in first side 11 in, and then can make backlight module 1 miniaturization.

Again, in Fig. 3 a, lug 13 be shaped as quadrilateral, but be not limited to this, also can backlight module 1 ' as shown in Figure 4 as, the shape of the lug 13 ' of light guide plate 10 ' is to be an obtuse triangle; In addition,, be not limited to this in Fig. 3 a, also can be linear, oval, triangle or polygon, and can be convex shape or invaginated type though the shape of pattern 14 is circular.

Again, in Fig. 3 a, pattern 14 density away from the incidence surface 13a of lug 13 (that is, away from breach 15) more is big more, but is not limited to this, also can pattern 14 be provided with away from the big more mode of area of the incidence surface 13a of lug 13 (that is, away from breach 15) more; In addition, in Fig. 3 b, light guide plate 10 integral body are to be homogeneous thickness, but be not limited to this, the thickness that also can make light guide plate 10 is being located near the incidence surface 13a of lug 13 (that is, near breach 15) greater than locating away from the incidence surface 13a of lug 13 (that is, away from breach 15).

Again, though will be appreciated that in Fig. 3 a, Fig. 3 b and Fig. 4, incidence surface 13a is a plane, but be not limited to this, also can be a curved surface (shown in Fig. 5 a and Fig. 5 b) or part curved surface (shown in Fig. 5 c and Fig. 5 d), that is breach 15 can be a curved surface or part curved surface in the face of the side of light source 20.

In addition, because light source 20 is arranged in the breach 15 of light guide plate 10, light source 20 and light guide plate 10 are positioned on the same surface level, shown in Fig. 3 b figure, can make backlight module 1 slimming thus.

As above-mentioned, because light source is not the corner that is positioned at light guide plate, and can be recessed in the side, and then can make the backlight module miniaturization; Because light source and light guide plate are to be positioned on the same surface level, can make the backlight module slimming by this again.

Again, will be appreciated that, can constitute a liquid crystal indicator if a liquid crystal panel is arranged on the above-mentioned backlight module 1.

Though disclosed the present invention in conjunction with above preferred embodiment; right its is not in order to limiting the present invention, anyly is familiar with this operator, without departing from the spirit and scope of the present invention; can do a little change and retouching, so protection scope of the present invention should be with being as the criterion that claim was defined.

Claims

1. backlight module comprises:

Light guide plate, the second side that it has a first side and is connected with this first side,

It is characterized in that be formed with a lug on the light guide plate second side, wherein this lug has an incidence surface, wherein the incidence surface of this lug is to be connected with this second side, and the incidence surface of this lug is not connected with this first side.

2. backlight module as claimed in claim 1 is characterized in that this light guide plate has an exiting surface, and has a plurality of patterns on this exiting surface.

3. backlight module as claimed in claim 2 is characterized in that, this each pattern density or area away from the incidence surface of this lug more is big more.

4. backlight module as claimed in claim 2 is characterized in that, that the shape of this each pattern comprises is linear, circular, ellipse or polygon.

5. backlight module as claimed in claim 2 is characterized in that the shape of this each pattern comprises convex shape or invaginated type.

6. backlight module as claimed in claim 1 is characterized in that, the incidence surface of this lug is a curved surface.

7. backlight module as claimed in claim 1 is characterized in that, the incidence surface of this lug is a part of curved surface.

8. backlight module as claimed in claim 1 is characterized in that, the thickness of this light guide plate near the incidence surface place of this lug greater than incidence surface place away from this lug.

9. backlight module as claimed in claim 1 is characterized in that, this lug be shaped as obtuse triangle.

10. backlight module as claimed in claim 1 is characterized in that, this light source and this light guide plate are positioned on the same surface level.

11. backlight module as claimed in claim 1 is characterized in that, this light source is a light emitting diode.

12. a liquid crystal indicator comprises:

Backlight module comprises the light guide plate of a second side that has a first side and be connected with this first side and light source; And

One liquid crystal panel is arranged on this backlight module,

It is characterized in that, be formed with a lug on the light guide plate second side, wherein this lug has an incidence surface, and described light source is set up in the mode in the face of the incidence surface of this lug, wherein the incidence surface of this lug is to be connected with this second side, and the incidence surface of this lug is not connected with this first side.

13. a backlight module comprises:

Light guide plate, the second side that it has a first side and is connected with this first side;

It is characterized in that, be formed with a lug on the light guide plate second side, wherein form a breach between the extended line of this lug and this first side, light source is arranged in this breach, and this lug is not connected with this first side.

14. backlight module as claimed in claim 13, wherein this light guide plate has an exiting surface, and has a plurality of patterns on this exiting surface.

15. backlight module as claimed in claim 14, wherein density or the area away from this breach is big more more for this each pattern.

16. backlight module as claimed in claim 14, wherein the shape of this each pattern comprises linear, circular, oval polygon.

17. backlight module as claimed in claim 14, wherein the shape of this each pattern comprises convex shape or invaginated type.

18. backlight module as claimed in claim 13, wherein this breach is a curved surface in the face of the light source limit.

19. backlight module as claimed in claim 13, wherein this breach is a part of curved surface in the face of the light source limit.

20. backlight module as claimed in claim 13, wherein this light guide plate has an exiting surface, and the thickness of this light guide plate near this indentation, there greater than away from this indentation, there.

21. backlight module as claimed in claim 13, wherein this lug is shaped as obtuse triangle.

22. backlight module as claimed in claim 13, wherein this light source and this light guide plate are positioned on the same surface level.

23. backlight module as claimed in claim 13, wherein this light source is a light emitting diode.

24. a liquid crystal indicator comprises:

One liquid crystal panel is arranged on this backlight module,

It is characterized in that, be formed with a lug on the light guide plate second side, wherein form a breach between the extended line of this lug and this first side, described light source is arranged in this breach, and this lug is not connected with this first side.