CN201233497Y

CN201233497Y - LCD projector

Info

Publication number: CN201233497Y
Application number: CNU2008200517094U
Authority: CN
Inventors: 霍志民; 梁键珀
Original assignee: TESHU PHOTOELECTRIC TECHNOLOGY (ZHONGSHAN) Co Ltd
Current assignee: TESHU PHOTOELECTRIC TECHNOLOGY (ZHONGSHAN) Co Ltd
Priority date: 2008-08-05
Filing date: 2008-08-05
Publication date: 2009-05-06
Anticipated expiration: 2018-08-05

Abstract

The utility model discloses an LCD projector which comprises a casing, an LCD and a projection lens, and the technical key points are as follows: the LCD projector further comprises an LCD light source and a condenser lens, the LCD light source which is perpendicular to a main optical shaft, the condenser lens which converges light of the light source and radiates the light to the LCD, the LCD and the projection lens which projects the light that penetrates the LCD to the outside are sequentially arranged in the casing, and the condenser lens, the LCD and the projection lens are arranged at certain intervals. The LCD projector aims to provide the LCD projector with high utilization rate of light energy and small size, thereby overcoming the shortcomings of low utilization rate of the light energy and big size of the prior LCD projector.

Description

A kind of LCD projector

[technical field]

The utility model relates to a kind of projector, especially relates to a kind of LCD projector.

[background technology]

The LCD LCD is the abbreviation of Liquid Crystal Display, the structure of LCD is to place liquid crystal in the middle of two parallel glass, the tiny electric wire that many vertical and levels are arranged in the middle of two sheet glass, whether seeing through switches on controls shaft-like quartzy molecular changes direction, and light refraction is come out to produce picture.The LCD liquid crystal projection apparatus has utilized the electrooptical effect of liquid crystal, can control brightness by the light of LCD, color, contrast etc. by circuit.The LCD liquid crystal projection apparatus, the projected picture color rendition is true, the color saturation height; But the efficiency of light energy utilization of existing LCD liquid crystal projection apparatus is not high, cause projection screen brightness not enough, and also there is the excessive shortcoming of volume in existing LCD liquid crystal projection apparatus.

[utility model content]

The purpose of this utility model is the little LCD projector of a kind of efficiency of light energy utilization height, volume that provides in order to overcome existing not high, the bulky deficiency of LCD projector luminous energy utilization factor.

In order to solve the technical matters of above-mentioned existence, the utility model adopts following technical proposal:

A kind of LCD projector, comprise housing, LCD, projection lens's group, it is characterized in that also comprising led light source, condenser group, be provided with successively in the housing vertical primary optical axis led light source, be used for source light can coalescence shine LCD condenser group, LCD, be used for and will pass projection lens's group that the LCD ray cast is gone out, described condenser group, LCD, projection lens's group separate certain distance and are provided with;

The condenser group comprises three condensers as mentioned above, wherein first condenser is the lens of convex surface for one side for concave surface, another side, led light source is arranged in the concave surface of first condenser, wherein second condenser is that the two sides all is the lens of convex surface, and wherein the 3rd condenser is that the two sides all is the lens of convex surface; First condenser, second condenser, the 3rd condenser separate certain distance and are provided with, and the convex surface of first condenser is adjacent with second condenser;

Projection lens's group comprises two projection lenses as mentioned above, and wherein first projection lens is that the two sides all is the lens of convex surface, and wherein second projection lens is the lens of convex surface for one side for concave surface, another side; Second projection lens is arranged on the outside of housing and its convex surface towards the housing outside, and its concave surface is adjacent with first projection lens.

The utility model compared with prior art has following advantage:

1, light utilization ratio height has higher picture quality and the brightness of Geng Gao; Because lens combination has made full use of whole light that LED sends, make and project bright and clear on the extraneous projection screen at last;

2, adopt the led light source environmental protection, the heat that it sends seldom; LED is by the superhigh intensity of superconduction luminescent crystal generation, the light of super brightness; Life-span is long, can reach 100,000 hours; Super power saving, Ultra Low Cost;

3, owing to adopt LED, making provides the partial volume of lighting source to reduce; Because the lens combination converging ray shortens whole optical path, also reduced volume greatly simultaneously; Thereby the projector volume is less, weight is lighter, and manufacturing process is simpler.

[description of drawings]

Fig. 1 is a light path synoptic diagram of the present utility model;

Fig. 2 is a stereographic map of the present utility model;

Fig. 3 is a STRUCTURE DECOMPOSITION synoptic diagram of the present utility model;

Fig. 4 is a structure explosive view of the present utility model.

[embodiment]

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

See Fig. 1,3,4.A kind of LCD projector, comprise housing 1, LCD2, projection lens's group 5, it is characterized in that also comprising led light source 4, condenser group 3, be provided with successively in the housing vertical primary optical axis 6 led light source, be used for source light can coalescence shine LCD condenser group, LCD, be used for and will pass projection lens's group that the LCD ray cast is gone out, condenser group, LCD, projection lens's group separate certain distance and are provided with.

The light that led light source emits passes through condenser group post-concentration, projects on the liquid crystal board, and the light that reflects in the liquid crystal board is assembled in projection lens's group, is projected on the extraneous projection screen by projection lens's group and forms piece image.

The light angle that led light source sends is big, and both sides outermost light is spent near 180 near vertical primary optical axis and angle, in order to guarantee to make full use of light, improves the brightness that projects on the projection screen, so designed the condenser group.Condenser group 3 comprises three condensers, wherein first condenser 31 is the lens of convex surface for one side for concave surface, another side, led light source is arranged in the concave surface of first condenser, wherein second condenser 32 is that the two sides all is the lens of convex surface, and wherein the 3rd condenser 33 is that the two sides all is the lens of convex surface; First condenser, second condenser, the 3rd condenser separate certain distance and are provided with, and the convex surface of first condenser is adjacent with second condenser.The concave surface of first condenser wraps in led light source wherein, nearly 180 degree light that led light source sends are outwards dispersed away from primary optical axis, diminish through the angle of light and main shaft behind first condenser but outwards disperse, approaching parallel or parallel through light behind second condenser and main shaft, assemble towards main shaft through light behind the 3rd condenser, project on the LCD then.

Projection lens's group 5 comprises two projection lenses, and wherein first projection lens 51 is that the two sides all is the lens of convex surface, and wherein second projection lens 52 is the lens of convex surface for one side for concave surface, another side; Second projection lens is arranged on the outside of housing and its convex surface towards the housing outside, and its concave surface is adjacent with first projection lens.Gather a bit after light that LCD reflects is through first projection lens, light continues to move ahead through dispersing on the projection screen that projects outside the housing after second projection lens then.

Claims

1, a kind of LCD projector, comprise housing (1), LCD (2), projection lens's group (5), it is characterized in that also comprising led light source (4), condenser group (3), be provided with successively in the housing vertical primary optical axis (6) led light source, be used for source light can coalescence shine LCD condenser group, LCD, be used for and will pass projection lens's group that the LCD ray cast is gone out, described condenser group, LCD, projection lens's group separate certain distance and are provided with.

2, a kind of LCD projector according to claim 1, it is characterized in that described condenser group (3) comprises three condensers, wherein first condenser (31) is the lens of convex surface for one side for concave surface, another side, led light source (4) is arranged in the concave surface of first condenser, wherein second condenser (32) is that the two sides all is the lens of convex surface, and wherein the 3rd condenser (33) is that the two sides all is the lens of convex surface; First condenser, second condenser, the 3rd condenser separate certain distance and are provided with, and the convex surface of first condenser is adjacent with second condenser.

3, a kind of LCD projector according to claim 1 and 2, it is characterized in that described projection lens group (5) comprises two projection lenses, wherein first projection lens (51) is that the two sides all is the lens of convex surface, and wherein second projection lens (52) is the lens of convex surface for one side for concave surface, another side; Second projection lens is arranged on the outside of housing and its convex surface towards the housing outside, and its concave surface is adjacent with first projection lens.