CN1485657A

CN1485657A - A LCD having backlight and forelight function light guiding plate

Info

Publication number: CN1485657A
Application number: CNA021307601A
Authority: CN
Inventors: 吴贤行
Original assignee: Wintek Corp
Current assignee: Wintek Corp
Priority date: 2002-09-25
Filing date: 2002-09-25
Publication date: 2004-03-31
Anticipated expiration: 2022-09-25
Also published as: CN1276292C

Abstract

The invention discloses a liquid crystal display having a backlight and fore light function light conducting plate, mainly comprising cooperating light conducting plate and a liquid crystal display module and at least one illuminating source, wherein the light conducting plate is divided into a first light conducting portion and a second light conducting portion, a first deflector plate is arranged on the surface of the first light conducting plate far from the liquid crystal display module, a second deflector plate is arranged on the surface of the second light conducting plate in cooperation with the liquid crystal display module, for reflecting the light rays projected to the second display portion from the second light conducting portion.

Description

A kind of LCD with backlight and forelight function light guiding plate

Technical field

The present invention relates to a kind of LCD with backlight and forelight function light guiding plate, relate in particular to a kind of by single light guide plate in conjunction with a LCD MODULE, and cooperation is located at the reflecting plate of light guide plate and LCD MODULE respectively, make light guide plate have preceding light and backlight function concurrently, and can reach the LCD of double-sided display effect.

Background technology

Fig. 5 is the structural representation of normally used a kind of double side liquid crystal display, it mainly is to be respectively equipped with a backlight 82,83 on the two sides of reflecting plate 81, one side at each backlight 82,83 relative these reflecting plate 81 is provided with one group of LCD MODULE 84,85 again, so that each backlight 82,83 provides two groups of LCD MODULE 84,85 required backlight respectively, can make mobile phone or other use the cover plate of the electronic goods of this technology all to have a LCDs like this at inside and outside.

Yet the double side liquid crystal display of structure need be provided with two backlight 82,83 as light source as mentioned above, and two groups of LCD MODULE 84,85, just can reach the effect of double-sided display, therefore, manufacturing cost is higher, and also need consume more electric energy in use; In addition, the double side liquid crystal display that constitutes by 82,83 and two groups of LCD MODULE 84,85 of two backlight, nearly one times of the general single face LCD increase of its integral thickness meeting, and have influence on the product design freedom that mobile phone or other electronic goods etc. cooperate.

See also Fig. 6 again, it is the structural representation of another kind of double side liquid crystal display, it mainly is that two sides in light guide plate 91 is respectively in conjunction with LCD MODULE 92,93, the light of light source 94 can be throwed to two LCD MODULE 92,93 via light guide plate 91, and provide two groups of LCD MODULE 92,93 required backlight respectively, can make inside and outside of cover plate of mobile phone or PDA all have a LCDs like this.

The double side liquid crystal display of structure as mentioned above, though only cooperate light guide plate 91 to supply with the required light of two LCD MODULE 92,93, still need use two groups of LCD MODULE 92,93, therefore by light source 94, manufacturing cost is still higher, and still comparatively power consumption; Integral thickness then can not effectively reduce, and therefore, can have influence on the product design freedom that mobile phone or other electronic goods etc. cooperate equally.

Therefore, existing double side liquid crystal display has improved necessity.

Summary of the invention

Fundamental purpose of the present invention is to solve the above problems and a kind of LCD with backlight and forelight function light guiding plate is provided, and makes the present invention cooperate a LCD MODULE reach the effect of double-sided display by single light guide plate.

Technical scheme of the present invention: a kind of LCD with backlight and forelight function light guiding plate, mainly comprise a light guide plate, a LCD MODULE that combines with this light guide plate, and the more than one light source of supplying with this light guide plate light; It is characterized in that: described light guide plate has a faying face to combine with this LCD MODULE, and this light guide plate is divided into first light guide section and second light guide section, this LCD MODULE is to first light guide section that should light guide plate and second light guide section and divide into first display part and second display part, be provided with a polaroid between this first light guide section and this first display part, and this first light guide section is provided with first reflecting plate with respect to the one side that is provided with polaroid, and this second display part is provided with second reflecting plate with respect to the one side that combines with this light guide plate.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is a ray cast synoptic diagram of the present invention.

Fig. 3 is the light of the first light guide structure of the present invention path synoptic diagram of passing through.

Fig. 4 is the light of the second light guide structure of the present invention path synoptic diagram of passing through.

Fig. 5 is the structural representation of normally used a kind of double side liquid crystal display.

Fig. 6 is the structural representation of normally used another kind of double side liquid crystal display.

Embodiment

See also Fig. 1 to Fig. 4, a kind of LCD of present embodiment with backlight and forelight function light guiding plate, mainly comprise a light guide plate 1, a LCD MODULE 2 that combines with this light guide plate 1, and a light source 3 supplying with this light guide plate 1 light, and this LCD MODULE 2 is made up of a top glass substrate 201, a lower glass substrate 202 and the liquid crystal layer 203 that is located at 201,202 of this upper and lower glass substrates.

This light guide plate 1 has a faying face 101 and combines with this LCD MODULE 2, and be provided with a polaroid 13 between this light guide plate 1 and this Liquid Crystal Module 2, and this light guide plate 1 is divided into first light guide section 11 and second

light guide section

12, and 2 pairs of this LCD MODULE should light guide plate 1 first light guide section 11 and second light guide section 12 divide into first display part 21 and second display part 22, and this polaroid 13 partly is the form of a semi-reflective polaroid 13A between this first light guide section 11 and this first display part 21, and the part of this polaroid 13 between second light guide section 12 and this second display part 22, it then is the form of a transmission-type polaroid 13B, and this first light guide section 11 is provided with first reflecting plate 14 with respect to the one side that is provided with semi-reflective polaroid 13A, and this second display part 22 is provided with second reflecting plate 23 with respect to the one side that combines with this light guide plate 1.

First light guide section 11 of this light guide plate 1 has a plurality of first light guide structures 111 adjacent to the one side of this first reflecting plate 14, and in the present embodiment, each first light guide structure 111 is the cancave cambered surfaces towards these LCD MODULE 2 directions.And this second light guide section 12 is provided with a plurality of second light guide structures 121 with respect to the one side of faying face 101, and in the present embodiment, this second light guide structure 121 is the V-shaped groove shape structures of section.

See also Fig. 2, because first light guide section 11 of this light guide plate 1 is provided with first reflecting plate 14 in the one side with respect to this LCD MODULE 2, and the one side of these first light guide section, 11 contiguous these first reflecting plates 14 is provided with first light guide structure 111 of a plurality of concave arc shapes, so the light of being injected by light source 3 can be through the reflection of first light guide structure 111 and first reflecting plate 14, and with the direction projection of light towards this semi-reflective polaroid 13A; And the light of directive semi-reflective polaroid 13A has partly refraction and passes this first display part 21 and penetrate, and makes first display part 21 form the form of demonstration backlight.

And another part of the light of directive semi-reflective polaroid 13A can reflect to this first light guide structure 111 and first reflecting plate 14, allow light constantly in this light guide plate 1, reflect, make second light guide section 12 still can keep sufficient light away from this light source 3 towards these second light guide section, 12 directions.

And be projected to the light of this second light guide section 12, understand some directly projection to this second display part 22, another partly light then can throw to second light guide structure 121, and, throw again to this second display part 22 via the reflection of second light guide structure 121.And all projections all can be via the reflection of second reflecting plate 23 to the light of this second display part 22, and passes this second display part 22 and second light guide section 12, second display part 22 is formed before the form that shows of light.

Below should first light guide section 11 and second light guide section 12 on first and second light guide structure 111,121 do respectively further to describe in detail.

See also Fig. 3, it is the pass through synoptic diagram in path of the light of first light guide structure 111, for ease of the path of expression light, this first light guide structure 111 amplified illustrates in Fig. 3.Because this first light guide structure 111 is the cancave cambered surfaces towards LCD MODULE 2 directions, therefore, when light L is projected to each first light guide structure 111, can produce reflected light L1 towards polaroid 13, with refract light L2 towards first reflecting plate 14, certainly, refract light L2 still can constantly produce reflected light and refract light between first reflecting plate 14 and first light guide structure 111, and these reflected light and refract light finally all can throw towards semi-reflective polaroid 13A, make part light pass semi-reflective polaroid 13A and this first display part 21 of directive, as the backlight of this first display part 21.Another light partly then can reflect in this first light guide section 11 via this polaroid 13.

See also Fig. 4 again, it is the pass through synoptic diagram in path of the light of second light guide structure 121, for ease of the path of expression light, this second light guide structure 121 amplified illustrates in Fig. 4.Because each second light guide structure 121 is the V-shaped groove shape structure of section, make projection to the reflected light L ' 1 of the light L ' of each second light guide structure 121 meeting generation towards this second display part 22, with the refract light L ' 2 that passes this second light guide structure 121, and reflected light L ' 1 can pass this this second reflecting plate 23 of second display part, 22 directives, second display part 22 is passed in reflection again, and forms the front light-source of this second display part 22.

By above explanation as can be known, LCD of the present invention only has the effect that a light guide plate 1 and one group of LCD MODULE 2 can reach double-sided display, therefore can significantly reduce manufacturing cost, and can reduce power consumption, to save use cost, and the integral thickness of LCD of the present invention can significantly reduce, thereby promotes the product of cooperation with it such as the design freedom of mobile phone and other electronic goods etc.

Claims

1, a kind of LCD with backlight and forelight function light guiding plate mainly comprises a light guide plate, a LCD MODULE that combines with this light guide plate, and the more than one light source of supplying with this light guide plate light; It is characterized in that: described light guide plate has a faying face to combine with this LCD MODULE, and this light guide plate is divided into first light guide section and second light guide section, this LCD MODULE is to first light guide section that should light guide plate and second light guide section and divide into first display part and second display part, be provided with a polaroid between this first light guide section and this first display part, and this first light guide section is provided with first reflecting plate with respect to the one side that is provided with polaroid, and this second display part is provided with second reflecting plate with respect to the one side that combines with this light guide plate.

2, the LCD with backlight and forelight function light guiding plate according to claim 1 is characterized in that: first light guide section of described light guide plate has a plurality of first light guide structures adjacent to the one side of this first reflecting plate.

3, the LCD with backlight and forelight function light guiding plate according to claim 1 is characterized in that: second light guide section of described light guide plate is provided with a plurality of second light guide structures with respect to the one side of faying face.

4, the LCD with backlight and forelight function light guiding plate according to claim 1, it is characterized in that: described polaroid is arranged between this light guide plate and this LCD MODULE, and the part of this polaroid between first light guide section and this first display part is the form of half reflection polaroid, and the part of this plane of polarisation between second light guide section and this second display part then is the form of transmission-type polaroid.

5, the LCD with backlight and forelight function light guiding plate according to claim 2 is characterized in that: each first light guide structure is the cancave cambered surface towards this liquid crystal mould display module direction.

6, the LCD with backlight and forelight function light guiding plate according to claim 3 is characterized in that: each second light guide structure is the V-shaped groove shape structure of section.