CN102818220A - Light guide system - Google Patents

Abstract

The invention relates to a light guide system comprising light emitting diodes (LEDs), a first photo-coupler and a light conduction device. The first photo-coupler is used for coupling light of the light emitting diodes into the light conduction device. One end of the light conduction device is connected with the first photo-coupler, and the other end thereof is provided with a second photo-coupler. The second photo-coupler is connected with a light guide plate of a backlight module of a display screen and used for coupling light outputted by the light conduction device into the light guide plate. The light guide system has the advantages that the number of the LEDs is reduced, and LED light utilization efficiency is high and light loss is low by the aid of the connection of high-efficient photo-couplers and the light conduction device. Since the LEDs are connected with the light guide plate through the light conduction device rather than connected with that directly, the problem of spatial limit of LED heat radiation is solved, so that junction temperature of the LEDs is reduced, light emitting efficiency is improved, and the service lives of the LEDs are prolonged.

Description

A kind of light-guiding system

Technical field

The present invention relates to a kind of light-guiding system that is applied to the LED display field of backlights.

Background technology

The light-guiding system of existing LED display module backlight be LED 1 directly be posted on theLGP 4 of liquid crystal TV the edge (side entering type, edge-lit, as shown in Figure 5) or be placed directly in LGP the back side (straight-down negative, direct-lit).It is a lot of that the side entering type light-guiding system and for example descends shortcoming: LED number to need, few to tens, arrives hundreds of more, if a number very little, can cause light guide plate luminance inhomogeneous; It is not high that LED is directly coupled to the LED leaded light efficient that causes on the LGP, and part light is lost; LED directly is attached to the edge thickness that the LGP edge can increase TV, especially behind wiring board that adds LED and fin, occupies the rim space of screen especially; The heat dissipation problem of LED is difficult to resolve and determines because of spatial constraints.

Summary of the invention

The present invention is directed to the problems referred to above, as: LED causes light guide plate luminance inhomogeneous too much, and LED leaded light efficient is not high, and LED heat radiation is difficult to resolve problem such as determine, and a kind of light-guiding system that is applied to field of backlights is provided.

The technical scheme that the present invention solves the problems of the technologies described above is following: a kind of light-guiding system that is applied to field of backlights; It comprises light emitting diode, first photo-coupler and light conduction device; Said first photo-coupler is used for light emitting diode coupled light to the light conduction device; One end of said smooth conduction device is connected with first photo-coupler; The other end is provided with second photo-coupler, and said second photo-coupler is connected with the LGP of display backlight module, and second photo-coupler is used for the LGP that couples light to the output of light conduction device.

Further, said first photo-coupler and second photo-coupler are the coupling optical lens.

Further, said smooth conduction device is fibre bundle or clad light pipe.

Further, said second photo-coupler is bonded in the LGP edge of display backlight module, perhaps,

Said second coupler is connected the edge of LGP through the hole on the LGP.

Further, said light emitting diode is at least one.

The invention has the beneficial effects as follows: reduce by LED number, the light of less LED is coupled in the light conduction device equably, because total light source is identical, photochromic repeatability and uniformity are better; Owing to adopt the connection of optically-coupled efficiently and light conduction device, LED light utilization ratio is high, and light loss is few; Pass through the light conduction device and is connected with LGP because the present invention is LED, rather than LED directly is connected on the LGP, what the frame of LED display can be done very carefully approaches, the effect attractive in appearance of increase display screen outward appearance; Same solved the problem of the spatial constraints of LED heat radiation, the LED junction temperature has been reduced, thereby improve luminous efficiency, increased LED service life because LED needn't directly be connected on the LGP.

Description of drawings

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

Fig. 2 is a specific embodiment of the invention structural representation;

Fig. 3 uses sketch map for the present invention;

Fig. 4 is connected sketch map for fibre bundle of the present invention with LGP;

Fig. 5 is a prior art structural representation of the present invention.

The specific embodiment

Below in conjunction with accompanying drawing principle of the present invention and characteristic are described, institute gives an actual example and only is used to explain the present invention, is not to be used to limit scope of the present invention.

Like Fig. 1, Fig. 2 and shown in Figure 3; A kind of light-guiding system, it comprises light emitting diode 1, first photo-coupler 2 andlight conduction device 3, saidsmooth conduction device 3 is fibre bundle or clad light pipe;Light conduction device 3 adopts fibre bundle in the present embodiment; Said first photo-coupler 2 be used for light emitting diode 1 couple light tolight conduction device 3, an end of saidsmooth conduction device 3 is connected with first photo-coupler 2, the other end is provided with second photo-coupler 31; Said second photo-coupler 31 is connected with the LGP of display backlight module, and second photo-coupler 31 is used forlight conduction device 3 output coupled light toLGP 4.

Said first photo-coupler 2 and second photo-coupler 31 are the coupling optical lens.

Said second photo-coupler 2 is bonded in the LGP edge of display backlight module, and perhaps, saidsecond coupler 2 is connected the edge of LGP through the hole on the LGP.

Light emitting diode 1 is at least one; The quantity of light emitting diode 1 depends on the size of display screen; For example: adopt the demonstration of 32 cun TV display screen of large-power light-emitting diodes realization of 4 10W; Be specially, each LED will couple light in 20 optical fiber through first photo-coupler, and 40 optical fiber heads of the other end of optical fiber output are connected to two sides of LGP uniformly; Second coupler on the optical fiber head couples light on theLGP 4 optical fiber output, is illustrated in figure 4 as the sketch map that fibre bundle is connected with LGP;

Also can adopt the great power LED of a 10W, with coupling light in 10 optical fiber of LED, 10 optical fiber heads of the other end of optical fiber output are connected to the side of LGP, form LED plane lamp thus.

In addition, light-guiding system of the present invention can be connected on the lamp socket, and LGP adopts the arc LGP, realizes almost non-flanged, small and exquisite, the artistic attractive in appearance plane desk lamp of outward appearance.

The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (5)

1. light-guiding system; It is characterized in that: it comprises light emitting diode, first photo-coupler and light conduction device; One end of said smooth conduction device is connected with first photo-coupler, and the other end is provided with second photo-coupler, and said first photo-coupler is used for light emitting diode coupled light to the light conduction device; Said second photo-coupler also is connected with the LGP of exterior display screen module backlight, and second photo-coupler is used for the LGP that couples light to the output of light conduction device.

2. a kind of light-guiding system according to claim 1 is characterized in that: said first photo-coupler and second photo-coupler are the coupling optical lens.

3. a kind of light-guiding system according to claim 1 is characterized in that: said smooth conduction device is fibre bundle or clad light pipe.

4. a kind of light-guiding system according to claim 1 is characterized in that: said second photo-coupler is bonded in the LGP edge of display backlight module, perhaps,

Said second coupler is connected the edge of LGP through the hole on the LGP.

5. according to each described a kind of light-guiding system of claim 1-4, it is characterized in that: said light emitting diode is at least one.

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