CN2852185Y

CN2852185Y - Prism sheet and prism sheet set

Info

Publication number: CN2852185Y
Application number: CN 200520061097
Authority: CN
Inventors: 陈信铭; 许育儒
Original assignee: Innolux Shenzhen Co Ltd; Innolux Display Corp
Current assignee: Innolux Shenzhen Co Ltd; Innolux Corp
Priority date: 2005-07-01
Filing date: 2005-07-01
Publication date: 2006-12-27
Anticipated expiration: 2015-07-01

Abstract

The utility model relates to a prismatic lens used for back light modules of liquid crystal displays. The utility model comprises a basal body, wherein the basal body comprises a light outlet surface and a light inlet surface; the light outlet surface is provided with parallelly arranged v-shaped grooves; the range of acute angles formed by the v-shaped grooves and the long edge of the basal body is between 5 DEG to 44.9 DEG. The utility model also relates to a prismatic lens group which comprises two lamination arranged prismatic lenses. The relative change of the included angle formed by v-shaped grooves of the prismatic lenses and the long edge of the basal body influences the optical performance of the prismatic lenses, and the optical performance influence is favorable to the design option of optical characteristics. Thus, the optical design freedom can be enhanced.

Description

Prismatic lens and prismatic lens group

[technical field]

The utility model relates to a kind of prismatic lens and prismatic lens group that is used in the LCD backlight module.

[background technology]

LCD has been widely used in various information, communication, the consumer products.Because liquid crystal panel itself does not have the characteristics of luminescence, thus generally provide light source by module backlight, to obtain good visual effect.

Seeing also Fig. 1, is the structural representation of a kind of prior art module backlight.This module 100 backlight comprises a fluorescent tube 101, a reflector plate 102, a light guide plate 103 and a prismatic lens 104.This fluorescent tube 101 is arranged on light guide plate 103 1 sides, and this reflector plate 102, light guide plate 103 and prismatic lens 104 be stacked arrangement from top to bottom successively.

Fluorescent tube 101 sends beam Propagation to light guide plate 103, and light guide plate 103 cooperates with reflector plate 102 and light beam is transformed into area source evenly penetrates.This prismatic lens 104 concentrates on the certain angle outgoing with the light beam that disperses.

See also Fig. 2, industry also has utilizes two prismatic lenses that are arranged above and below 210,220 to constitute prismatic lens group 200 to reach better light harvesting effect.The exiting surface of each prismatic lens is equipped with the V-groove that is arranged in parallel, and wherein goes up the mutual homeotropic alignment of V-groove of V-groove Yu the following prismatic lens 220 of prismatic lens 210.

But when carrying out some optical characteristics optimal design, the mutually perpendicular structure of V-groove of upper and lower two prismatic lenses 210,220 has bigger restriction in optical design actual.

[utility model content]

For overcoming the limited shortcoming of prior art prismatic lens optical design degree of freedom, be necessary to provide a kind of optical design degree of freedom high prismatic lens.

For overcoming the limited shortcoming of prior art prismatic lens group optical design degree of freedom, be necessary the prismatic lens group that provides a kind of optical design degree of freedom high.

The prismatic lens that one better embodiment is disclosed comprises a matrix.This matrix comprises an exiting surface and an incidence surface, and this exiting surface is provided with the V-groove that is arranged in parallel.The long angular range that the limit became of this V-groove and matrix one is 5 to spend to 44.9 degree.

The prismatic lens group that another better embodiment disclosed comprises two prismatic lenses of stacked arrangement.Each prismatic lens comprises a matrix, and this matrix comprises an exiting surface and an incidence surface.This exiting surface is provided with the V-groove that is arranged in parallel, and the long angular range that the limit became of the V-groove of at least one prismatic lens and its matrix one is 5 to spend to 44.9 degree.

Compared with prior art, prismatic lens of the present utility model influences optical characteristics by changing the V-groove direction, thereby improves the optical design degree of freedom, and can cooperate the design that changes other parameter of prism to satisfy the visual angle demand.

[description of drawings]

Fig. 1 is the structural representation of a kind of prior art module backlight.

Fig. 2 is a kind of structural representation of prior art prismatic lens group.

Fig. 3 is the structural representation of the utility model prismatic lens first embodiment.

Fig. 4 is the structural representation of the utility model prismatic lens second embodiment.

Fig. 5 is the structural representation of the utility model prismatic lens group first embodiment.

Enclosing 6 is structural representations of the utility model prismatic lens group second embodiment.

[embodiment]

Seeing also Fig. 3, is the structural representation of the utility model prismatic lens first embodiment.This prismatic lens 300 comprises a rectangle matrix 301, and the upper surface of this matrix 301 is an exiting surface 303, and the lower surface of this matrix 301 is an incidence surface 302.This matrix 301 is made up of a kind of thermoplastic engineering plastic, and this incidence surface 302 is a smooth flat, and this exiting surface 303 has the V-groove 304 that is arranged in parallel.

The long angular range that the limit became of the V-groove 304 of this prismatic lens 300 and matrix 301 1 is 5 to spend to 44.9 degree, and in this angular range, briliancy is higher, and can improve optical interference striped such as Newton ring.Getting this angle in the present embodiment is 30 degree, does not promptly have interference fringe this moment.Because the V-groove 304 orientation meetings of this prismatic lens 300 influence its optical property, thus can carry out the optimal design of optical characteristics with matrix one than the long angle that the limit became by adjusting it, thus can improve the degree of freedom of design.

Seeing also Fig. 4, is the structural representation of the utility model prismatic lens second embodiment.This prismatic lens 400, its structure is similar to the prismatic lens 300 in first embodiment, comprises a rectangle matrix 401, and these matrix 401 upper surfaces are exiting surface 403, and these matrix 401 lower surfaces are incidence surface 402.But the V-groove 404 on this exiting surface 403 is to arrange along the diagonal of matrix 401, yet this moment, this diagonal line also was 5 to spend to 44.9 and spend with the long angular range that the limit became of its matrix one.

Seeing also Fig. 5, is the structural representation of the utility model prismatic lens group first embodiment.This prismatic lens group 500 comprises two prismatic lenses that are arranged above and below 510,520, and the shape of this upper and lower prismatic lens 510,520 is similar to size.Should go up prismatic lens 510 and comprise a rectangle matrix 511, these matrix 511 upper surfaces are exiting surface 513, and these matrix 511 lower surfaces are incidence surface 512.This matrix 511 is made up of a kind of thermoplastic engineering plastic, and incidence surface 512 is smooth, and exiting surface 513 has the V-groove 514 that is arranged in parallel.Following prismatic lens 520 structures are similar to last prismatic lens 510, comprise a rectangle matrix 521.The upper surface of this matrix 521 is exiting surfaces 523, and lower surface is an incidence surface 522.This exiting surface 523 is provided with the V-groove 524 that is arranged in parallel.

The reverse cross arrangement of V-groove of these upper and lower two prismatic lenses 510,520.

All there are angle in the V-groove of these upper and lower two prismatic lenses 510,520 and its in the long limit of matrix separately, and its angular range is 5 to spend to 44.9 degree, and in this scope, briliancy is higher.This angle all is taken as 30 degree in this embodiment, does not have interference fringe this moment.

Present embodiment also can be done following variation, and both only long angular range that the limit became of the V-groove of its a slice prismatic lens and its matrix one was 5 to spend to 44.9 degree.

Seeing also Fig. 6, is the structural representation of the utility model prismatic lens group second embodiment.This prismatic lens group 600 has two prismatic lenses that are arranged above and below 610,620, and the shape of these upper and lower two prismatic lenses 610,620 is similar to size.The structural similarity of the structure of this prismatic lens group 600 and prismatic lens group 500 first embodiments.But the V-groove of upper and lower two prismatic lenses 610,620 is all along its diagonal cross arrangement separately in this embodiment.Yet, the diagonal line of upper and lower two prismatic lenses 610,620 with its separately long angular range that the limit became of matrix one also be 5 to spend to 44.9 degree.

Present embodiment also can only allow the V-groove of a slice prismatic lens arrange along its diagonal in addition.

The shape at the V-groove top of prismatic lens exiting surface of the present utility model is not done special qualification, can be wedge angle or circular arc and other shape and structure.

Be different from the design limitations of prior art prismatic lens group vertical stratification, the utility model Mainly realize light by the variable angle that the long limit of V-groove and matrix one is become Learn the optimal design of performance, and can cooperate some other parameter of prismatic lens, such as corner angle, rib distance With Refractive Index of Glass Prism etc. to reach higher design freedom. To 5 the degree to 44.9 degree scopes In, it is strong that emergent light has briliancy, the advantage that the uniformity is high, and can eliminate the optics such as Newton's ring The interference fringe phenomenon.

Claims

1. prismatic lens, comprising: a matrix, this matrix comprise an exiting surface and an incidence surface, and this exiting surface is provided with the V-groove that is arranged in parallel, and it is characterized in that: the long angular range that the limit became of this V-groove and matrix one is 5 to spend to 44.9 degree.

2. prismatic lens as claimed in claim 1 is characterized in that: this V-groove is 30 degree with matrix one than the long angle that the limit became.

3. prismatic lens as claimed in claim 1 is characterized in that: this V-groove is 5 degree with matrix one than the long angle that the limit became.

4. prismatic lens as claimed in claim 1 is characterized in that: this V-groove is 44.9 degree with matrix one than the long angle that the limit became.

5. prismatic lens as claimed in claim 1 is characterized in that: this V-groove is arranged along the matrix diagonal.

6. prismatic lens group, two prismatic lenses that comprise stacked arrangement, each prismatic lens includes a matrix, this matrix comprises an exiting surface and an incidence surface, this exiting surface is provided with the V-groove that is arranged in parallel, and it is characterized in that: the long limit angle scope of the V-groove of at least one prismatic lens and its matrix one is 5 to spend to 44.9 degree.

7. prismatic lens group as claimed in claim 6 is characterized in that: the V-groove cross arrangement of at least one prismatic lens and be 30 degree with the long angle that the limit became of its matrix one.

8. prismatic lens group as claimed in claim 6 is characterized in that: the V-groove of at least one prismatic lens is 5 degree with its matrix one than the long angle that the limit became.

9. prismatic lens group as claimed in claim 6 is characterized in that: the V-groove of at least one prismatic lens is 44.9 degree with its matrix one than the long angle that the limit became.

10. prismatic lens group as claimed in claim 6 is characterized in that: the V-groove cross arrangement of two prismatic lenses and at least one arrange along diagonal separately.