CN1667464A - Narrow-angle specific position light emission device of liquid crystal display backlight panel module - Google Patents
Narrow-angle specific position light emission device of liquid crystal display backlight panel module Download PDFInfo
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- CN1667464A CN1667464A CN 200410006497 CN200410006497A CN1667464A CN 1667464 A CN1667464 A CN 1667464A CN 200410006497 CN200410006497 CN 200410006497 CN 200410006497 A CN200410006497 A CN 200410006497A CN 1667464 A CN1667464 A CN 1667464A
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Abstract
The invention relates to a privileged position emitting light apparatus in a small angle which is applied to liquid crystal display aphototropic board modular. The apparatus emits light from uncompleted and selected multiple privileged positions, and emission beam is only distributed in a small angle range, wherein, there is not light emitting between two adjacent emitting beam and central line distance between two emitting beam is similar to adjacent opening distance of liquid crystal display panel, besides, the line perpendicular to light conducting board emitting surface passes by liquid crystal display panel open.
Description
Technical field
It is about for overcoming known backlight module that LCD backlight plate module low-angle ad-hoc location of the present invention goes out electro-optical device, a large amount of luminous energies are because of shining the problem that is wasted in the lighttight part of the panel of LCD, and a kind of non-comprehensive and plural ad-hoc location bright dipping of creating through selecting, and light beam concentrates on low-angle, the backlight module that penetrates to the opening of the panel of LCD.
Background technology
Known light guide plate is mostly to obtain the technological thought of the even bright dipping of exiting surface, as United States Patent (USP) notification number 6356391, though also formed by the structure of tool prism array, its purpose is for trying to achieve the even of bright dipping; Technological thought of the present invention is different with technique known thought to the bright dipping of ad-hoc location low-angle.
United States Patent (USP) notification number 5917664, though also formed by the structure of tool prism array, yet its purpose when trying to achieve the conversion visual angle, brightness can not produce unexpected variation in some angles, and is different with technological thought of the present invention.
" light guide plate of many focuses of tool reflective device " patent of Taiwan patent announcement numbers 463957, shown in Fig. 8 A, B, face-off face at the light guide plate exiting surface forms most many focuses of tool reflective devices, each pattern is to form an arc surface in the centre, be the center with this arc surface again, form most annular arc surfaces from the inside to the outside, incident light reflex to the top bright dipping via the arc surface of each pattern on the light guide plate and on, to constitute a planar light source.This prior art is with the multidirectional reflection of the multifocal catoptron of tool, makes the illuminance distribution of flat light source, and is different with technological thought of the present invention.
" flat light source " patent of Taiwan patent announcement numbers 538285, as Fig. 9 A, shown in the B, utilize concavees lens 11n or convex lens 11p, by the recessed or multidirectional refraction of convex lens, make near the exiting surface of the side plane of incidence have the brightness of filling part, as Figure 10 A, B, Figure 11 A, shown in the B, also other side outside the face-off face of light guide plate exiting surface and the plane of incidence, form recessed catoptron 12p or convex reflector 12n that different densities distributes, by the recessed or multidirectional reflection of convex reflector, and, can improve the peripheral brightness of not enough easily in the past light guide plate at the higher catoptron of peripheral configuration density, make the Luminance Distribution and the homogenization of radiation angle of flat light source.This prior art is Luminance Distribution and the homogenization of radiation angle that makes flat light source with recessed or the multidirectional reflection of convex reflector, and is different with technological thought of the present invention.
Above-mentioned known backlight module, a large amount of luminous energies are wasted because of shining in the lighttight part of panel of LCD (as common electrode or black matrix" frame).
" light source partial penetration formula backlight LCD " patent of Taiwan patent announcement numbers 560621, as shown in figure 12, be to form reflection horizon 51 in LCD f bottom side with plural optical channel 52, and between LCD f and light guide plate h, establish a micromirror blooming g, this blooming g is in respect to 52 of optical channels light harvesting zone 61 being set, the self-control light of light guide plate h output is special through the light harvesting zone 61 of micromirror blooming g, optically focused is formed the self-control light L5 of more luminous energy, the optical channel 52 of penetrate through reflective layer 51 then, inject LCD f, the whole light emitting efficiency of LCD f, be to combine the natural light L4 of 51 high reflection and the self-control light that strengthens through micromirror blooming g optically focused, strengthen whole LCD f light emitting efficiency through the reflection horizon; Light harvesting zone 61 spotlight effects are got over the powerhouse, the self-control light L5 of optical channel 52 that passes reflection horizon 51 is just strong more, and can further make optical channel 52 that 51 shared area ratios are dwindled in the reflection horizon, the area ratio of reflection usefulness then improves, available reflection natural light L4 is just big more, a design can be strengthened the light emitting efficiency of LCD f by this, and can reduce the contrast with extraneous natural light L4.This prior art is that the micromirror blooming g with the reflection horizon 51 of tool optical channel 52 and tool light harvesting zone 61 is a feature, has the effect that self-control light L5 is penetrated to ad-hoc location, yet have self-control light L5 is independent of light guide plate h to the micromirror blooming g that ad-hoc location penetrates effect, construct different with the present invention, it is different technological thoughts, and this patent is not done the exposure of structure and feature thereof, parameter to micromirror blooming g and light harvesting zone 61, and the present invention then does exposure to structure and feature thereof, parameter.
Summary of the invention
It is for solving known backlight module that LCD backlight plate module low-angle ad-hoc location of the present invention goes out electro-optical device, a large amount of luminous energies are because of shining the problem that is wasted in the lighttight part of the panel of LCD, and create non-comprehensive and plural ad-hoc location bright dipping through selecting, and light beam concentrates on low-angle, the backlight module that penetrates to the opening of the panel of LCD.
For this reason, the technical scheme of the present invention's proposition is:
A kind of LCD backlight plate module low-angle ad-hoc location goes out electro-optical device, this goes out electro-optical device with non-comprehensive and plural ad-hoc location bright dipping through selecting, each emergent light that goes out optical position only is distributed in the low-angle scope, and those low-angle orientation include the orientation of pointing to particular orientation; It comprises:
Following prism, its function are that the light that scope is at an angle carried out transmits down the prism exit facet;
Light guide plate, its exiting surface have plural number and its formation one or integrated prism down;
Last prism, its function be make light from its plane of incidence incident after total reflection with specific bearing range outgoing;
Last prism plate has a plurality of and its formation one or the one-body molded prism of going up on it.
The light of propagating with the direction of particular range in the light guide plate is gone out by prismatic refraction down, through an air gap, be refracted into prism after, go up the total reflection of prism another side certainly, these are transmitted prism plate by the light of total reflection; The light that transmits prism plate through respectively going up the prism total reflection only is distributed in the low-angle scope, and those low-angle orientation include the orientation of pointing to particular orientation, and respectively restraint the light beam that transmits prism plate and can treat as respectively this ad-hoc location ejaculation of self-conductance tabula rasa.
LCD backlight plate module low-angle ad-hoc location of the present invention goes out electro-optical device, because it is non-comprehensively from the ad-hoc location bright dipping, and light beam concentrates on low-angle, opening to the panel of LCD penetrates, therefore luminous energy is effectively used, and brightness can thereby promote, and improves the LCD picture quality, or/and power consumption can thereby reduce, prolong battery service time.
Description of drawings
Fig. 1 goes out the organigram of electro-optical device for LCD backlight plate module low-angle ad-hoc location of the present invention;
Fig. 2 goes out the illustrative view of electro-optical device for LCD backlight plate module low-angle ad-hoc location of the present invention;
Fig. 3 goes out the correlation parameter synoptic diagram of electro-optical device for LCD backlight plate module low-angle ad-hoc location of the present invention;
Fig. 4 goes out the small angle range bright dipping synoptic diagram of electro-optical device for LCD backlight plate module low-angle ad-hoc location of the present invention;
Effect synoptic diagram when film that none refractive index that Fig. 5 goes out electro-optical device for LCD backlight plate module low-angle ad-hoc location of the present invention is close with " going up prism plate " or packed layer;
Fig. 6 for LCD backlight plate module low-angle ad-hoc location of the present invention go out electro-optical device close film of a refractive index and " go up prism plate " or packed layer are arranged the time the effect synoptic diagram;
Fig. 7 goes out electro-optical device embodiment parameter synoptic diagram for LCD backlight plate module low-angle ad-hoc location of the present invention;
Fig. 8 A, B are the representative graph of " light guide plate of many focuses of tool reflective device " patent of prior art Taiwan patent announcement numbers 463957;
Fig. 9 A, B are one of the representative graph of " flat light source " patent of prior art Taiwan patent announcement numbers 538285;
Figure 10 A, B be prior art Taiwan patent announcement numbers 538285 " flat light source " patent representative graph two;
Figure 11 A, B be prior art Taiwan patent announcement numbers 538285 " flat light source " patent representative graph three;
Figure 12 is the representative graph of " light source partial penetration formula backlight LCD " patent of prior art Taiwan patent announcement numbers 560621.
[figure number explanation]
1 time prism
2 light guide plate
Prism on 3
Prism plate on 4
The opening of the panel of 5 LCD
6 air gap
7 times prism exit facets
The prism plane of incidence on 8
Prism fully reflecting surface on 9
The boundary of 10 times prisms and light guide plate that is prism class triangle base down
The normal of prism fully reflecting surface on 11
The boundary of prism and last prism plate that is last prism class triangle are near the opposite side of the drift angle of light guide plate on 12
13 air layers
14 LCD
Film or packed layer that 15 refractive indexes are close with last prism plate
The boundary of 16 two following prisms
The distance of the opening of the panel of L adjacent lcd display
The diagonal angle of prism exit facet under the ω
The angle of prism exit facet and bottom surface under the α
The last prism class of θ triangle is near the drift angle of light guide plate
Prism or upward prism material critical angle under the θ c
The normal angle of the fully reflecting surface of θ 1 light and last prism
The radius-of-curvature of the last prism plane of incidence of r1
The radius-of-curvature of the last prism fully reflecting surface of r2
The last prism plane of incidence of T and last prism fully reflecting surface have a common boundary, and (promptly going up prism class triangle leans on
The summit of the vertex angle theta of nearly light guide plate) to LCD reflection horizon bee-line
A is at following prism inner light beam width
Width of light beam when A ' leaves prism
When B does not have refractive index film close with last prism plate or packed layer, arrive liquid crystal
The light beam scope of showing the device panel
When B ' has refractive index film close with last prism plate or packed layer, arrive liquid crystal
The light beam scope of showing the device panel
Embodiment
For reaching target of the present invention: non-comprehensive and plural ad-hoc location bright dipping through selecting, and light beam concentrates on low-angle, the backlight module that penetrates to the opening of the panel of LCD, as shown in Figure 1, LCD backlight plate module low-angle ad-hoc location of the present invention goes out electro-optical device and comprises:
Following prism 1, its function are that the light that scope is at an angle carried out transmits down the prism exit facet;
Following prism 1 and go up prism 3 and comprise that also the cross section is the leg-of-mutton shape of class, to reach prism 3 cross sections be the example explanation for the class triangle to then following prism 1 in explanation of the present invention and diagram.
As shown in Figure 2, light is transmitted to down prism 1 in light guide plate 2, and following start process is arranged:
The light of propagating with the direction of special angle scope (with respect to light guide plate) in the light guide plate 2, exit facet 7 by following prism 1 reflects, through an air gap 6, after being refracted into the plane of incidence 8 of prism 3, promptly go up fully reflecting surface 9 total reflections of prism 3 from last prism 3 another sides, total reflection and the light that transmits prism plate 4 only are distributed in the low-angle scope, and those low-angle orientation include the orientation of pointing to particular orientation, in explanation of the present invention and diagram, then include with those low-angle orientation the panel that points to LCD opening 5 and perpendicular on the orientation of prism plate 4 be the example explanation, and the light beam that each bundle transmits prism plate 4 can treat as the self-conductance tabula rasa respectively this ad-hoc location penetrate, the light beam that then transmits prism plate 4 with each bundle in explanation of the present invention and diagram can treat as that the close position of this time prism boundary 16 is emitted as routine explanation by being positioned at respectively.
Said process has following characteristic, with reference to figure 1, Fig. 2, Fig. 3:
(1) each bundle transmits the light beam of prism plate 4 only by being positioned at the respectively close position ejaculation of the boundary 16 of this time prism 1;
(2) total reflection and the light that transmits prism plate 4 only is distributed in the low-angle scope, and those low-angle orientation include the opening 5 of the panel that points to LCD and perpendicular to the orientation of last prism plate 4; The perpendicular line perpendicular to last prism plate 4 of drawing from the boundary 16 of two following prisms 1, the opening 5 of the panel by LCD;
(3) in the light incident behind the prism 3, be equal to or greater than the critical angle θ c of prism 3 materials with normal 11 angle theta 1 of the fully reflecting surface 9 of last prism 3;
(4) in the light incident behind the prism 3,, by the angle of release scope A ' of those light of total reflection, as shown in Figure 4, be similar to the angle of release scope A of those light before prism 1 outgoing down, and contain direction perpendicular to last prism plate 4 through fully reflecting surface 9 total reflections of last prism 3.
For reaching the start process that has as above-mentioned characteristic, following prism 1 must have following feature with last prism 3, and and light guide plate 2 have following relation with last prism plate 4, following correlation parameter and with the auxiliary explanatory note of Fig. 3:
(1) one side 10 that prism 1 class triangle contacts with light guide plate under (that is boundary of following prism 1 and light guide plate 2), its length of side L is similar to opening 5 distances of the panel of LCD;
(2) perpendicular line perpendicular to last prism plate 4 of drawing from the boundary 16 of two following prisms 1, the opening 5 of the panel by LCD;
(3) scope of the diagonal angle ω of prism 1 exit facet 7 is down:
0＜ω≤0.5 θ c, wherein θ c is following prism 1 material critical angle;
(4) scope of the angle α of prism 1 exit facet 7 and bottom surface is down:
0＜α≤90°；
(5) upward the vertex angle theta scope of the close light guide plate 2 of prism 3 class triangles is:
90 °-θ c≤θ≤180 °-α-ω, wherein θ is last prism 3 class triangles near light guide plate drift angle angles, θ c is prism 1 material critical angle down, α is the angle with the bottom surface of prism 1 exiting surface down, ω under the diagonal angle of prism 1 exiting surface;
(6) the radius-of-curvature r of the last prism plane of incidence
1Scope be:
T＜r
1≤ ∞, wherein T is last prism 3 planes of incidence 8 and goes up prism 3 fully reflecting surfaces 9 boundaries (promptly going up the summit of prism 3 class triangles near the vertex angle theta of light guide plate 2) to LCD reflection horizon bee-line,
The radius-of-curvature r of last prism 3 fully reflecting surfaces 9
2Scope be:
T＜r
2≤ ∞, wherein T is last prism 3 planes of incidence 8 and goes up prism 3 fully reflecting surfaces 9 boundaries (promptly going up the summit of prism 3 class triangles near the vertex angle theta of light guide plate 2) to LCD reflection horizon bee-line;
(7) position of the center of curvature of last prism 3 planes of incidence 8 and fully reflecting surface 9 more than the opposite side 12 (that is the boundary of going up prism 3 and last prism plate 4) of the vertex angle theta of the close light guide plate of last prism 3 class triangles.
As shown in Figure 5, when a very important air layer 13 is arranged between LCD 14 and the backlight module, can make the light that shines air layer 13 from last prism plate 4 produce a refraction angle, the light beam scope B that therefore arrives panel of LCD can become big; One of technological means that the present invention deals with problems is: the orientation of emergent light is in small angle range, so as shown in Figure 6, between panel of LCD and light guide plate module, paste the last layer refractive index diaphragm similar 15 to light guide plate, or filling one deck refractive index packed layer similar to light guide plate, because refractive index is similar, so light beam scope B ' is little than B.
Followingly illustrate that with table one, Fig. 7 LCD backlight plate module low-angle ad-hoc location of the present invention goes out the part embodiment of electro-optical device, the indivedual concrete numerical value that what follows embodiment proposed, being part embodiment of the present invention only, is not therefore to limit to claim of the present invention.
Table one
| N=1.49, θ c=42.2 °, light source is for intending directional light (opposite side that is parallel to the α angle), and r1=∞, r2=∞, last prism thickness 0.7mm, n=are light guide plate material refractive index, θ
1Normal 11 angles for the fully reflecting | |||||||
| Parameter value | The result | ||||||
| The embodiment numbering | ??ω | ????α | ????θ | ????θ 1 | ???A | ??A′ | Rising angle |
| ????1 | ??10° | ????50° | ????80° | ????50° | ???≈0.035 ???mm | ??≈0.03 ??mm | ??≈90° |
| ????2 | ??21.1° | ????50° | ????74.5° | ????55.6° | ???≈0.074 ???mm | ??≈0.07 ??mm | ??≈90° |
As shown in Table 1, within the set parameter area of technological thought of the present invention, that is:
(1)0＜ω≤0.5θc，
(2)0＜α≤90°，
(3)90°-θc≤θ≤180°-α-ω，
(4)T＜r1≤∞，
(5)T＜r2≤∞，
Cooperate within the technological thought of the present invention last prism and down prism the two with the opening of the panel of light guide plate, last prism plate, LCD and the relation in LCD reflection horizon, the present invention truly has the plural ad-hoc location bright dipping of reaching through selecting, and light beam concentrates on low-angle, the target of the technological thought of the backlight module that penetrates to the opening of the panel of LCD.
The center of gravity of the technology of the present invention thought is the plural ad-hoc location bright dipping that is through selecting, and light beam concentrates on low-angle, backlight module that penetrates to the opening of the panel of LCD and the last prism that belongs to the above-mentioned parameter scope and time prism and the two and light guide plate, last prism plate, the relation in the opening of the panel of LCD and LCD reflection horizon, the indivedual concrete numerical value of above-mentioned parameter is can be according to the optical laws of natural principle, with mathematical computations and reasoning from logic or Computer Simulation and get, naturally be included in the claim of the present invention, such as use the equivalence of constructing described in the claim of the present invention to change, all should be contained in the claim of the present invention, so indivedual concrete numerical value that above-listed described embodiment is proposed, being part embodiment of the present invention only, is not therefore to limit to claim of the present invention.
LCD backlight plate module low-angle ad-hoc location of the present invention goes out electro-optical device, before applying for a patent, both has not been seen in publication, also be not disclosed in application before, conform with the important document of novelty; Non-comprehensive ground of the present invention and the plural ad-hoc location bright dipping through selecting certainly, and light beam concentrates on low-angle, opening to the panel of LCD penetrates, therefore luminous energy is effectively used, brightness can thereby promote, improve the LCD picture quality, or/and power consumption can thereby reduce, prolong battery service time, improve known backlight module, a large amount of luminous energies are because of shining the problem that is wasted in the lighttight part of the panel of LCD, therefore conform with the important document of practicality and progressive,, earnestly ask and give examination so propose patented claim in accordance with the law, and the gift quasi patent, the true feeling moral is just.
Yet the above is preferred embodiment of the present invention only, is not therefore to limit to claim of the present invention, uses the equivalence of constructing described in the claim of the present invention to change such as, all should be contained in the claim of the present invention.
Claims (23)
1, a kind of LCD backlight plate module low-angle ad-hoc location goes out electro-optical device, it is characterized in that: go out electro-optical device with non-comprehensive and plural ad-hoc location bright dipping through selecting, each emergent light that goes out optical position only is distributed in the low-angle scope, and those low-angle orientation include the orientation of pointing to particular orientation; It comprises:
Following prism, its function are that the light that scope is at an angle carried out transmits down the prism exit facet;
Light guide plate, its exiting surface have plural number and its formation one or integrated prism down;
Last prism, its function are that the light from its plane of incidence incident is penetrated with specific bearing range after its fully reflecting surface total reflection;
Last prism plate has a plurality of and its formation one or the integrated prism of going up on it;
The light of propagating with the direction of particular range in the light guide plate is gone out by prismatic refraction down, through an air gap, be refracted into prism after, go up the total reflection of prism another side certainly, these are transmitted prism plate by the light of total reflection; The light that transmits prism plate through respectively going up the prism total reflection only is distributed in the low-angle scope, and those low-angle orientation include the orientation of pointing to particular orientation, and respectively restraint the light beam that transmits prism plate and can treat as respectively this ad-hoc location ejaculation of self-conductance tabula rasa.
2, LCD backlight plate module low-angle ad-hoc location as claimed in claim 1 goes out electro-optical device, and it is characterized in that: the cross section of this time prism is the class triangle.
3, LCD backlight plate module low-angle ad-hoc location as claimed in claim 1 goes out electro-optical device, and it is characterized in that: cross section of prism is the class triangle on this.
4, LCD backlight plate module low-angle ad-hoc location as claimed in claim 1 goes out electro-optical device, it is characterized in that: each bundle transmits the light beam of prism plate can treat as the respectively close position ejaculation of this time prism boundary on the self-conductance tabula rasa.
5, LCD backlight plate module low-angle ad-hoc location as claimed in claim 2 goes out electro-optical device, it is characterized in that: cross section of prism is the class triangle on this, and wherein respectively restraints the light beam that transmits prism plate and can treat as the respectively close position ejaculation of this time prism boundary on the self-conductance tabula rasa.
6, LCD backlight plate module low-angle ad-hoc location as claimed in claim 5 goes out electro-optical device, it is characterized in that: one side that this time prism class triangle contacts with light guide plate, its length of side is similar to the extended distance of the panel of LCD.
7, LCD backlight plate module low-angle ad-hoc location as claimed in claim 5 goes out electro-optical device, it is characterized in that: the light that transmits prism plate only is distributed in the low-angle scope, and those low-angle orientation include the orientation of the opening of the panel that points to LCD.
8, LCD backlight plate module low-angle ad-hoc location as claimed in claim 5 goes out electro-optical device, it is characterized in that: the light that transmits prism plate only is distributed in the low-angle scope, and those low-angle orientation include the orientation perpendicular to last prism plate.
9, LCD backlight plate module low-angle ad-hoc location as claimed in claim 5 goes out electro-optical device, it is characterized in that: the straight line perpendicular to last prism plate that descends prism to have a common boundary certainly to draw, the opening of the panel by LCD.
10, LCD backlight plate module low-angle ad-hoc location as claimed in claim 5 goes out electro-optical device, it is characterized in that: the light of propagating with the direction of particular range in the light guide plate, go out by following prismatic refraction, through an air gap, after being refracted into prism, be equal to or greater than the critical angle of prism with the normal angle of last prism another side.
11, LCD backlight plate module low-angle ad-hoc location as claimed in claim 5 goes out electro-optical device, it is characterized in that: in the light incident behind the prism, through last prism total reflection, be similar to from the following angle of release scope of prism emergent light by the angle of release scope of those light of total reflection, and contain orientation perpendicular to last prism plate.
12, LCD backlight plate module low-angle ad-hoc location as claimed in claim 5 goes out electro-optical device, and it is characterized in that: the scope at the diagonal angle of following prism exit facet is: greater than zero degree to being less than or equal to 1/2nd of down prism material critical angle.
13, LCD backlight plate module low-angle ad-hoc location as claimed in claim 5 goes out electro-optical device, and it is characterized in that: the scope of the angle of following prism exit facet and bottom surface is: greater than zero, be less than or equal to 90 degree.
14, LCD backlight plate module low-angle ad-hoc location as claimed in claim 5 goes out electro-optical device, it is characterized in that: the drift angle range Theta that goes up the close light guide plate of prism class triangle is: 90 °-θ c≤θ≤180 °-α-ω, wherein θ is the drift angle angle of last prism class triangle near light guide plate, θ c is prism material critical angle down, α is the diagonal angle of following prism exit facet for the angle of following prism exiting surface and bottom surface, ω.
15, LCD backlight plate module low-angle ad-hoc location as claimed in claim 5 goes out electro-optical device, it is characterized in that:
The prism fully reflecting surface has a common boundary to LCD reflection horizon bee-line the radius-of-curvature of the last prism plane of incidence in order to reach upward greater than the last prism plane of incidence, is less than or equal to infinity;
The prism fully reflecting surface has a common boundary to LCD reflection horizon bee-line the radius-of-curvature of last prism fully reflecting surface in order to reach upward greater than the last prism plane of incidence, is less than or equal to infinity.
16, LCD backlight plate module low-angle ad-hoc location as claimed in claim 5 goes out electro-optical device, it is characterized in that: the position of the center of curvature more than the opposite side of the drift angle of the close light guide plate of last prism class triangle of going up the prism plane of incidence and fully reflecting surface.
17, LCD backlight plate module low-angle ad-hoc location as claimed in claim 5 goes out electro-optical device, it is characterized in that: one side that following prism class triangle contacts with light guide plate, and its length of side is similar to the extended distance of the panel of LCD; Draw opening perpendicular to the panel of the straight-line pass LCD of last prism plate from following position, prism boundary.
18, LCD backlight plate module low-angle ad-hoc location as claimed in claim 5 goes out electro-optical device, it is characterized in that:
In the light incident behind the prism, be equal to or greater than the critical angle of prism with the normal angle of last prism another side;
In the light incident behind the prism,, be similar to from the angle of release scope of prism emergent light down, and contain orientation perpendicular to last prism plate by the angle of release scope of those light of total reflection through last prism total reflection.
19, LCD backlight plate module low-angle ad-hoc location as claimed in claim 5 goes out electro-optical device, it is characterized in that:
The scope at the diagonal angle of following prism exit facet is: greater than zero degree to being less than or equal to 1/2nd of down prism material critical angle;
The scope of the angle of following prism exit facet and bottom surface is: spend to being less than or equal to 90 greater than zero degree;
Last prism class triangle near the drift angle range Theta of light guide plate is: 90 °-θ c≤θ≤180 °-α-ω, wherein θ is the drift angle angle of last prism class triangle near light guide plate, θ c is prism material critical angle down, α is the diagonal angle of following prism exiting surface for the angle of following prism exit facet and bottom surface, ω.
20, LCD backlight plate module low-angle ad-hoc location as claimed in claim 19 goes out electro-optical device, it is characterized in that: one side that following prism class triangle contacts with light guide plate, and its length of side is similar to the extended distance of the panel of LCD; Draw opening perpendicular to the panel of the straight-line pass LCD of last prism plate from following position, prism boundary; In the light incident behind the prism,, be similar to from the angle of release scope of prism emergent light down, and contain orientation perpendicular to last prism plate by the angle of release scope of those light of total reflection through last prism total reflection.
21, LCD backlight plate module low-angle ad-hoc location as claimed in claim 20 goes out electro-optical device, it is characterized in that:
The prism fully reflecting surface has a common boundary to LCD reflection horizon bee-line the radius-of-curvature of the last prism plane of incidence in order to reach upward greater than the last prism plane of incidence, is less than or equal to infinity;
The prism fully reflecting surface has a common boundary to LCD reflection horizon bee-line the radius-of-curvature of last prism fully reflecting surface in order to reach upward greater than the last prism plane of incidence, is less than or equal to infinity.
22, LCD backlight plate module low-angle ad-hoc location as claimed in claim 21 goes out electro-optical device, it is characterized in that: the position of the center of curvature more than the opposite side of the drift angle of the close light guide plate of last prism class triangle of going up the prism plane of incidence and fully reflecting surface.
23, go out electro-optical device as each described LCD backlight plate module low-angle ad-hoc location in the claim 1 to 22, it is characterized in that: between last prism plate and LCD, be provided with one deck refractive index film or the packed layer close with last prism plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100064974A CN100523946C (en) | 2004-03-10 | 2004-03-10 | Narrow-angle specific position light emission device of liquid crystal display backlight panel module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100064974A CN100523946C (en) | 2004-03-10 | 2004-03-10 | Narrow-angle specific position light emission device of liquid crystal display backlight panel module |
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|---|---|
| CN1667464A true CN1667464A (en) | 2005-09-14 |
| CN100523946C CN100523946C (en) | 2009-08-05 |
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| CNB2004100064974A Expired - Fee Related CN100523946C (en) | 2004-03-10 | 2004-03-10 | Narrow-angle specific position light emission device of liquid crystal display backlight panel module |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103562618A (en) * | 2011-05-31 | 2014-02-05 | 三菱电机株式会社 | Backlight device and liquid crystal display device |
| CN104459869A (en) * | 2013-09-18 | 2015-03-25 | 汽车照明罗伊特林根有限公司 | Illumination device of a motor vehicle |
| CN106156694A (en) * | 2015-03-27 | 2016-11-23 | 深圳印象认知技术有限公司 | Image acquisition device bracket component and image acquisition device |
| CN107132694A (en) * | 2017-06-14 | 2017-09-05 | 上海天马微电子有限公司 | A kind of backlight module and display device |
| WO2017177654A1 (en) * | 2016-04-11 | 2017-10-19 | 京东方科技集团股份有限公司 | Display device |
| CN110400829A (en) * | 2019-01-25 | 2019-11-01 | 友达光电股份有限公司 | Display panel |
-
2004
- 2004-03-10 CN CNB2004100064974A patent/CN100523946C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103562618A (en) * | 2011-05-31 | 2014-02-05 | 三菱电机株式会社 | Backlight device and liquid crystal display device |
| CN103562618B (en) * | 2011-05-31 | 2015-09-30 | 三菱电机株式会社 | Back lighting device and liquid crystal indicator |
| CN104459869A (en) * | 2013-09-18 | 2015-03-25 | 汽车照明罗伊特林根有限公司 | Illumination device of a motor vehicle |
| CN104459869B (en) * | 2013-09-18 | 2020-04-21 | 汽车照明罗伊特林根有限公司 | Lighting device for a motor vehicle |
| CN106156694A (en) * | 2015-03-27 | 2016-11-23 | 深圳印象认知技术有限公司 | Image acquisition device bracket component and image acquisition device |
| CN106156694B (en) * | 2015-03-27 | 2021-09-17 | 深圳印象认知技术有限公司 | Image collector bracket component and image collector |
| WO2017177654A1 (en) * | 2016-04-11 | 2017-10-19 | 京东方科技集团股份有限公司 | Display device |
| US10698275B2 (en) | 2016-04-11 | 2020-06-30 | Boe Technology Group Co., Ltd. | Display apparatus |
| CN107132694A (en) * | 2017-06-14 | 2017-09-05 | 上海天马微电子有限公司 | A kind of backlight module and display device |
| CN107132694B (en) * | 2017-06-14 | 2020-06-23 | 上海天马微电子有限公司 | Backlight module and display device |
| CN110400829A (en) * | 2019-01-25 | 2019-11-01 | 友达光电股份有限公司 | Display panel |
| CN110400829B (en) * | 2019-01-25 | 2021-10-22 | 友达光电股份有限公司 | Display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100523946C (en) | 2009-08-05 |
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