CN103792612A - Light guide plate, area source device with light guide plate and transmission-type image display device - Google Patents
Light guide plate, area source device with light guide plate and transmission-type image display device Download PDFInfo
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Abstract
The invention relates to a light guide plate, an area source device with the light guide plate and a transmission-type image display device. A light diffusing surface of a light guide plate substrate satisfies the following conditions that: first virtual reference lines and second virtual reference lines are parallel to an X-axis direction; third virtual reference lines and fourth virtual reference lines are parallel to a Y-axis direction which is orthogonal to the X-axis direction; the first virtual reference lines and the second virtual reference lines which are parallel to each other are alternately arranged in a uniformly-spaced manner, and the interval of the first virtual reference lines and the second virtual reference lines is a; the third virtual reference lines are arranged in a uniformly-spaced manner, and the interval of the third virtual reference lines is b; the fourth virtual reference lines which are parallel to the third virtual reference lines are arranged at positions which are 0 to b/2 away from the third virtual reference lines; and the fourth virtual reference lines are arranged in a uniformly-spaced manner, and the interval of the fourth virtual reference lines is b which is provided with the first, second, third and fourth virtual reference lines. With the above structure adopted, virtual grids can be structured in a manner that virtual grid points which are adopted as intersection points of the first virtual reference lines and the second virtual reference lines and intersection points of the second virtual reference lines and the fourth virtual reference lines are selectively configured with dot patterns of light diffusing points in a manner that a second area and a first area are larger than or equal to 80%.
Description
Technical field
The present invention relates to light guide plate, possess planar light source device and the transmission-type image display device of this light guide plate.
Background technology
The transmission-type image display devices such as liquid crystal indicator conventionally have supply with planar light, as the planar light source device of backlight.In planar light source device, exist and there is light guide plate, and the planar light source device of the edge-light mode of light source is set along its end face.In the light guide plate using at such planar light source device, the known light guide plate that has an a kind of face of the light guide plate base material in formation light guide plate to be provided with light diffusion point.
In this light guide plate, from the light of the surface feeding sputtering of light guide plate in light guide plate base material on one side between two sides total reflection advance on one side, diffusion (scattering) is carried out in the effect of light diffusion point of the light diffusion face by being arranged at light guide plate, supplies with planar light by the light of angle composition more than critical angle from the exit facet outgoing of light guide plate.In such light guide plate, even for the brightness of light that makes to penetrate from exit facet, for example carry out more more increasing the quantity of light diffusion point or the size of increase light diffusion point etc. and making away from light source the processing of the variable density of light diffusion point.
As the method that forms such light diffusion point, for example disclose a kind of use head (head) of configuration equally spaced point-blank, made this to forming the method (with reference to TOHKEMY 2012-151048 communique, Fig. 3 etc.) of light diffusion point with the movement of the orthogonal direction (later also referred to as " moving direction ") of the direction (later also referred to as " orientation ") of arranging nozzle on light guide plate base material and from the nozzle ink that drips.In addition, conventionally also carry out forming light diffusion point by serigraphy etc.
Patent documentation 1: TOHKEMY 2012-151048 communique
Having formed in the light guide plate of such light diffusion point, if there is contaminated place in the surface of light guide plate base material for example, or there is inhomogeneous place in the processing of light guide plate raw sheet before printing, the shape entanglement slightly of the light diffusion point sometimes forming on the surface of light guide plate base material.In such light diffusion point, diffusive condition changes compared with light diffusion point around.Linearity configured light diffusion and put in such light guide plate, because the diffusive condition at light diffusion point place changes, Shi get ー part is bright point by visual confirmation sometimes, or is dark point by visual confirmation, is identified as thus inhomogeneous part.As light guide plate, be not preferably observed the light guide plate of so inhomogeneous part.
Summary of the invention
Given this, fundamental purpose of the present invention is, is light guide plate, the planar light source device that possesses this light guide plate and the transmission-type image display device of inhomogeneous part even if a kind of also can the inhibition in the case of the shape entanglement of light diffusion point by visual confirmation is provided.
The light guide plate the present invention relates to is only being provided with the light guide plate for the light diffusion point of diffused light as propagating on the light diffusion face of a face of light guide plate base material of light, to the setting of light diffusion face 1st virtual reference line and the 2nd virtual reference line parallel with the 1st direction be parallel to the 3rd virtual reference line and the 4th virtual reference line of 2nd direction orthogonal with the 1st direction.In addition, light diffusion face is set to following virtual grid: the 1st virtual reference line being parallel to each other and the 2nd virtual reference line are by alternate configurations and uniformly-spaced configured, the 3rd virtual reference line is uniformly-spaced configured, in the time the interval of the 1st virtual reference line and the 2nd virtual reference line being made as to a, the 3rd virtual reference line interval is each other made as to b, be configured to open with the 3rd virtual reference line sky the distance of 0 above b/2 with the 4th virtual reference line of the 3rd virtual reference line parallel, and the 4th virtual reference line is uniformly-spaced configured each other, and its interval is b.Having in the light guide plate of the light diffusion face of having set such virtual grid, possesses the dot pattern that is provided with light diffusion point in a part for the virtual net lattice point of the intersection point of the intersection point as the 1st virtual reference line and the 3rd virtual reference line and the 2nd virtual reference line and the 4th virtual reference line.For dot pattern, on 40%～90% virtual net lattice point in whole virtual net lattice points, be provided with in the 1st region of light diffusion point, the overwhelming majority that the virtual net lattice point of light diffusion point is not set belongs to the 2nd region.The 2nd region is have more than 2a range and have range more than 2b and on whole virtual net lattice points, do not configure the region of light diffusion point in the 1st direction in the 2nd direction.
In this light guide plate, on 40%～90% virtual net lattice point in whole virtual net lattice points, be provided with in the 1st region of light diffusion point, the overwhelming majority that the virtual net lattice point of light diffusion point is not set belongs in the 2nd direction and has range more than 2a and have the 2nd region that light diffusion point is not set on virtual net lattice point range, whole more than 2b in the 1st direction.Therefore,, even in the case of the shape entanglement of light diffusion point, also can suppress by visual confirmation is inhomogeneous part.
The planar light source device the present invention relates to possesses: above-mentioned light guide plate; With with the end face arranged opposite of light guide plate, supply with the light source portion of light to end face.
The transmission-type image display device the present invention relates to possesses: with the end face arranged opposite of light guide plate, supply with the light source portion of light to end face; With the exit facet side that is disposed at light guide plate, the optical illumination being penetrated from light guide plate shows the transmission-type image displaying part of image.
Fundamental purpose of the present invention is, is light guide plate, the planar light source device that possesses this light guide plate and the transmission-type image display device of inhomogeneous part even if a kind of also can the inhibition in the case of the shape entanglement of light diffusion point by visual confirmation is provided.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that has represented to apply the schematic configuration of the transmission-type image display device of an embodiment of the light guide plate the present invention relates to.
Fig. 2 is the vertical view while observing the light guide plate shown in Fig. 1 from light diffusion face side.
Fig. 3 represents an example of the dot pattern of the light diffusion face that is formed at, the i.e. vertical view of the 1st dot pattern.
Fig. 4 is light diffusion face side from being provided with light diffusion point to having the light guide plate of the 1st dot pattern and taking and the photo obtaining.
Fig. 5 is to the X shown in Fig. 4
1-X
1, Y
1– Y
1the region A of part
samplify the figure showing.
Fig. 6 represents an example of the dot pattern of the light diffusion face that is formed at, the i.e. vertical view of the 2nd dot pattern.
Embodiment
Below, with reference to accompanying drawing, embodiments of the present invention accompanying drawing is described.Give same reference numerals to identical key element.The repetitive description thereof will be omitted.The dimensional ratios of accompanying drawing may not be with illustrated consistent.In explanation, represent " on ", the term of the direction such as D score is the term that facilitates based on state shown in the drawings.
Fig. 1 is the schematic diagram that has represented to apply the schematic configuration of the transmission-type image display device of an embodiment of the light guide plate the present invention relates to.In Fig. 1, the formation of transmission-type image display device 10 is carried out to exploded representation.Can make transmission-type image display device 10 preferably utilize as the display device of mobile phone, various electronic equipments, TV set device.
Transmission-type image display device 10 shown in Fig. 1 mainly possesses: transmission-type image displaying part 20 and output are used for the planar light source device 30 of the planar light of supplying with to transmission-type image displaying part 20.Wherein, can between transmission-type image displaying part 20 and planar light source device 30, configure optics 40.The example of optics comprises reflective polarizing light separator sheet, light diffusion sheet material, lenticule sheet material and biconvex lens sheet material and prism sheet material etc., only otherwise depart from purport of the present invention, can use separately or combine configuration.
Below, for convenience of explanation, as shown in Figure 1, the direction of arranging transmission-type image displaying part 20 and optics 40 for planar light source device 30 is called to Z-direction.In addition, will be called X-direction and Y direction with the orthogonal both direction of Z-direction.X-direction and Y direction are mutually orthogonal.
Transmission-type image displaying part 20 is by being shown image from the planar optical illumination of planar light source device 30 outgoing.The example of transmission-type image displaying part 20 is the display panels as Polarizer fitting body that configured Polarizer 22,23 on the two sides of liquid crystal cells 21.In this situation, transmission-type image display device 10 is liquid crystal indicator (or LCD TV).The parts that liquid crystal cells 21 and Polarizer 22,23 can use the transmission-type image display devices such as liquid crystal indicator in the past to use.The example of liquid crystal cells 21 is TFT(Thin Film Transistor: thin film transistor (TFT)) type liquid crystal cells or STN(Super Twisted Nematic: supertwist is to row) type liquid crystal cells etc.
Planar light source device 30 is the edge-light type backlight mechanisms that supply with light to transmission-type image displaying part 20.Planar light source device 30 possesses: light guide plate 50; With with light guide plate 50 in the light source portion 60 of an end face 51c arranged opposite of mutual opposed side 51c, 51d.
Planar light source device 30 also can possess with respect to light guide plate 50 and is positioned at and the reflecting plate 70 of the opposition side of transmission-type image displaying part 20.Reflecting plate 70 is to make the light penetrating to reflecting plate 70 from light guide plate 50 again incide the parts of light guide plate 50.Reflecting plate 70 can be illustrated in figure 1 sheet.In addition, reflecting plate 70 can be also the framework bottom surface of receiving the planar light source device 30 of light guide plate 50, the bottom surface that has been implemented mirror finish.
Light guide plate base material 51 has: be formed as near flat, and be formed with the light diffusion face 51a of the multiple light diffusion points 54 that describe in detail below; Be configured to and transmission-type image displaying part 20(or optics 40) mutually opposed, as the exit facet 51b of face that penetrates light; With 4 end face 51c, 51d intersecting with light diffusion face 51a and exit facet 51b, 51e, 51f(with reference to Fig. 2).As shown in Figure 2, end face 51c and end face 51d are mutually opposed in X-direction.End face 51c and light source portion 60 are opposed.In this situation, end face 51c is the plane of incidence from the light of light source portion 60 by incident.In addition, end face 51e and end face 51f are mutually opposed in Y direction.Exit facet 51b and the light diffusion face 51a of light guide plate base material 51 are opposed.The exit facet 51b of light guide plate base material 51 can be tabular surface as in the present embodiment, also can have concaveconvex shape.In addition, the light diffusion face 51a of light guide plate base material 51 can be also the face that has been implemented lyophoby processing.
Light guide plate base material 51 is mainly formed by translucent material.As translucent material, preferably poly-(methyl) acrylic acid alkyl resin sheet, polystyrene sheet material or polycarbonate-based resin sheet preferably adopts plexiglass sheet material (PMMA resin sheet) among these.Light guide plate base material 51 also can contain scattering particle.
Fig. 2 is the vertical view while observing light guide plate from light diffusion face side.In Fig. 2, for convenience of explanation, change size, number and the collocation method etc. of light diffusion point 54, schematically represented.In addition, also together represented light source portion 60(point source of light 61).
On the light diffusion face 51a of light guide plate base material 51, form multiple light diffusion points 54.Light diffusion point 54 is overlooked down and is formed as sub-circular.As shown in Figure 2, multiple light diffusion points 54 on light diffusion face 51a mutually away from configuration.Space D (for example central part of light diffusion point 54 distance each other) at 2 light diffusion points 54 of light incident direction (if in Fig. 2 explanation be X-direction) adjacency is larger than the diameter of light diffusion point 54.The example of the space D of 2 light diffusion points 54 of adjacency is roughly below the above 100 μ m of 50 μ m.In addition, the diameter of light diffusion point 54 is roughly below the above 90 μ m of 10 μ m.Preferred light diffusion point 54 does not link each other.Light diffusion point 54 can use the ink of optical diffuse, for example, use ultraviolet curing ink, water-base ink or solvent-based inks etc.Light diffusion point 54 is by formation such as ink-jet method and silk screen print methods.
For light diffusion point 54, the size of diameter is adjusted to from exit facet 51b and penetrates efficiently uniform planar light, and its diameter is approaching light source portion 60(point source of light 61) end face 51c side little, along with become large away from light source portion 60.In addition, 1st～4th virtual reference line L1～L4 and the virtual net lattice point P of the dot pattern that with respect to the allocation position of light diffusion face 51a, light diffusion point 54 is made up of light diffusion point 54 based on setting on light diffusion face 51a decides.
Below, mainly use Fig. 3 and Fig. 6 to describe the example of the dot pattern being formed by multiple light diffusion points 54.Fig. 3 is the i.e. vertical view of the 1st dot pattern of an example that represents the dot pattern of the light diffusion face that is formed at.Fig. 6 is the i.e. vertical view of the 2nd dot pattern of an example that represents the dot pattern of the light diffusion face that is formed at.The vertical view of any one dot pattern has all represented the dot pattern of a part that is formed at light diffusion face 51a.First, the 1st dot pattern shown in Fig. 3 is described.
(the 1st dot pattern)
On the light diffusion face 51a of light guide plate base material 51, be provided with virtual grid shown below.; as shown in Figure 3, virtual grid is represented with the solid line parallel with Y direction in Fig. 3 by the 1st virtual reference line L1(), the 2nd virtual reference line L2(represents with the dotted line parallel with Y direction in Fig. 3), the 3rd virtual reference line L3(represents with the solid line parallel with X-direction in Fig. 3) and the 4th virtual reference line L4(in Fig. 3, represent with the dotted line parallel with X-direction) form.The 1st～4th virtual reference line L1～L4 sets by condition (1)～(6) shown below.
(1) the 1st virtual reference line L1 and the 2nd virtual reference line L2 are parallel with Y direction (the 1st direction).
(2) the 3rd virtual reference line L3 and the 4th virtual reference line L4 are parallel to the X-direction orthogonal with Y direction (the 2nd direction).
(3) the 1st virtual reference line L1 being parallel to each other and the 2nd virtual reference line L2 be by alternate configurations, and uniformly-spaced configured.
(4) the 3rd virtual reference line L3 are uniformly-spaced configured.
(5) in the time the interval of the 1st virtual reference line L1 and the 2nd virtual reference line L2 being made as to a, the 3rd virtual reference line L3 interval is each other made as to b, the 4th virtual reference line L4 parallel with the 3rd virtual reference line L3 is configured in the position of leaving b/2 from the 3rd virtual reference line L3.
(6) the 4th virtual reference line L4 are uniformly-spaced configured, its interval be the 3rd virtual reference line L3 that is parallel to each other of b(and the 4th virtual reference line L4 by alternate configurations, and uniformly-spaced configured, its interval is b/2).
The interval a of the 1st virtual reference line L1 and the 2nd virtual reference line L2 is set to below the above 100 μ m of 50 μ m.The 3rd virtual reference line L3 interval and the 4th virtual reference line L4 interval b each other is each other set to below the above 100 μ m of 50 μ m.
In the formation of such virtual grid, the intersection point of the intersection point of the 1st virtual reference line L1 and the 3rd virtual reference line L3 and the 2nd virtual reference line L2 and the 4th virtual reference line L4 is set to virtual net lattice point P.In Fig. 3, be equivalent to virtual net lattice point P with the intersection point of black circle (●) or white part of enclosing (zero) coincidence.
The light guide plate 50 of present embodiment is characterised in that, possesses in a part of the virtual net lattice point P setting as described above, configured the 1st dot pattern 55A of light diffusion point 54 to meet the mode of the relational expression (A) shown in following.Wherein, in Fig. 3, the virtual net lattice point P1 that is provided with light diffusion point 54 is represented by the intersection point of the part overlapping with white circle (zero), the virtual net lattice point P2 of light diffusion point 54 is not set by representing with the intersection point of black circle (●) coincidence.
The 2nd region A2/ the 1st region A1 >=80%(A)
The 1st region A1 is the region of the scope shown in following relational expression (B).
40%≤(being provided with the quantity of the virtual net lattice point P of the quantity of the virtual net lattice point P1 of light diffusion point 54/whole)≤90%(B)
The 2nd region A2 has range more than 2a and has region range and that light diffusion point 54 is not set on whole virtual net lattice point P more than 2b in Y direction in X-direction.In the time using Fig. 3 specifically to describe, such as region A21 and region A22 etc. are equivalent to the 2nd region A2.The length of the X-direction of region A21 is 4a, and the length of Y direction is 2b.The length of the X-direction of region A22 is 2a, and the length of Y direction is 2b.Any one region A21, A22 have range more than 2a in X-direction, and have range more than 2b in Y direction.
; the light guide plate 50 of present embodiment is characterised in that to possess the 1st dot pattern 55A; the 1st dot pattern 55A is also referred to as " configuration virtual net point P1 " below being provided with the virtual net lattice point P1(of light diffusion point 54) in the 1st region A1 that is 40%～90% with respect to the ratio of whole virtual net lattice point P, the virtual net lattice point P2(that light diffusion point 54 is not set is following also referred to as " blank virtual net lattice point P2 ") the pattern that more than 80% belongs to the 2nd region A2.In the 1st dot pattern 55A, can be also do not arrange light diffusion point 54 virtual net lattice point P2 more than 90% belong to the 2nd region A2.Thus, even in the case of the shape entanglement of light diffusion point 54 that is arranged at light diffusion face 51a, also can further suppress by visual confirmation is inhomogeneous part.In addition, in the 1st dot pattern 55A, can be also that the virtual net lattice point P2 whole (100%) that light diffusion point 54 is not set belongs to the 2nd region A2.Thus, even in the case of the shape entanglement of light diffusion point 54 that is arranged at light diffusion face 51a, also can further suppress by visual confirmation is inhomogeneous part.
Wherein, in Fig. 3, represent that the size of the white circle (zero) of the virtual net lattice point P1 that is provided with light diffusion point 54 is not the size that represents the diameter of the light diffusion point 54 that is disposed at this virtual net lattice point P1.As mentioned above, the diameter of light diffusion point 54 is adjusted to from the light of exit facet 51b outgoing becomes uniform planar light.The diameter of light diffusion point 54 is roughly below the above 90 μ m of 10 μ m.
The characteristic of the 1st dot pattern 55A above-mentioned light guide plate 50 being possessed from other sides describes., as shown in Figure 3, in the 1st dot pattern 55A possessing in the light guide plate 50 of present embodiment, blank virtual net lattice point P2's more than 80% is that in the virtual net lattice point P being adjacent, at least 3 points are blank virtual net lattice point P2., " at least 3 points in the virtual net lattice point P of adjacency are blank virtual net lattice point P2 of blank virtual net lattice point P2 " is more than 80% with respect to the ratio of " whole blank virtual net lattice point P2 ".In the 1st dot pattern 55A, " at least 3 blank virtual net lattice point P2 that point is blank virtual net lattice point P2 in the virtual net lattice point P of adjacency " can be set as more than 90% with respect to the ratio of " whole blank virtual net lattice point P2 ".Thus, even in the case of the shape entanglement of light diffusion point 54 that is arranged at light diffusion face 51a, also can further suppress by visual confirmation is inhomogeneous part.In addition, in the 1st dot pattern 55A, " at least 3 blank virtual net lattice point P2 that point is blank virtual net lattice point P2 in the virtual net lattice point P of adjacency " can be set as to 100% with respect to the ratio of " whole blank virtual net lattice point P2 ".Thus, even in the case of the shape entanglement of light diffusion point 54 that is arranged at light diffusion face 51a, also can further suppress by visual confirmation is inhomogeneous part.
The characteristic of the 1st dot pattern 55A further from other sides, above-mentioned light guide plate 50 being possessed describes., as shown in Figure 3, in the 1st dot pattern 55A possessing in the light guide plate 50 of present embodiment, the virtual net lattice point P of adjacency whole are that the blank virtual net lattice point P2 of configuration virtual net point P1 is less than 20%., " the whole of the virtual net lattice point P of adjacency are the configuration virtual net point P1 of configuration virtual net point P1 " is less than 20% with respect to the ratio of " whole configuration virtual net point P1 ".In the 1st dot pattern 55A, can be that the blank virtual net lattice point P2 of configuration virtual net point P1 is made as below 10% by the virtual net lattice point P of adjacency whole.Thus, even in the case of the shape entanglement of light diffusion point 54 that is arranged at light diffusion face 51a, also can further suppress by visual confirmation is inhomogeneous part.In addition, in the 1st dot pattern 55A, can be that the blank virtual net lattice point P2 of configuration virtual net point P1 is set as 0 by the virtual net lattice point P of adjacency whole.Thus, even in the case of the shape entanglement of light diffusion point 54 that is arranged at light diffusion face 51a, also can further suppress by visual confirmation is inhomogeneous part.
Wherein, " the virtual net lattice point P of adjacency " of above-mentioned explanation refers to: apart from the distance as the virtual net lattice point P of object in than the interval of the 1st virtual reference line L1 and the 2nd virtual reference line L2 be a and the 3rd virtual reference line L3 each other or the 4th virtual reference line L4 interval be each other the virtual net lattice point P in a side's any larger in b the distance of 2 times little.
Fig. 4 represents light diffusion face 51a side from being provided with light diffusion point 54 to having the light guide plate 50 of the 1st such dot pattern 55A and taking and the photo obtaining.In addition, Fig. 5 represents the region A of the part to the 1st region A1 that is 40%～90% as configuration virtual net point P1 with respect to the ratio of whole virtual net lattice point P
s, i.e. X shown in Fig. 4
1-X
1, Y
1– Y
1the region A of part
sphoto after amplifying.
(the 2nd dot pattern)
Next, the 2nd dot pattern 55B shown in Fig. 6 is described.On the light diffusion face 51a of light guide plate base material 51, be provided with virtual grid shown below.; as shown in Figure 6; virtual grid is represented with the solid line parallel with Y direction in Fig. 6 by the 1st virtual reference line L1(), the 2nd virtual reference line L2(represents with the dotted line parallel with Y direction in Fig. 6), the 3rd virtual reference line L3(represents with the solid line parallel with X-direction in Fig. 6) and the 4th virtual reference line L4(in Fig. 6, represent with the dotted line parallel with X-direction) form, the 1st～4th virtual reference line L1～L4 is set by condition (11)～(16) by shown below.
(11) the 1st virtual reference line L1 and the 2nd virtual reference line L2 are parallel with Y direction (the 1st direction).
(12) the 3rd virtual reference line L3 and the 4th virtual reference line L4 are parallel to the X-direction orthogonal with Y direction (the 2nd direction).
(13) the 1st virtual reference line L1 being parallel to each other and the 2nd virtual reference line L2 be by alternate configurations, and uniformly-spaced configured.
(14) the 3rd virtual reference line L3 are uniformly-spaced configured.
(15), in the time the interval of the 1st virtual reference line L1 and the 2nd virtual reference line L2 being made as to a, the 3rd virtual reference line L3 interval is each other made as to b, it is the position of 0 distance that the 4th virtual reference line L4 parallel with the 3rd virtual reference line L3 is configured in apart from the 3rd virtual reference line L3., the 4th virtual reference line L4 configuration that overlaps with the 3rd virtual reference line L3.This condition (15) is different from the 1st dot pattern 55A.
(16) the 4th virtual reference line L4 are uniformly-spaced configured, and its interval is b.
The interval a of the 1st virtual reference line L1 and the 2nd virtual reference line L2 is set to below the above 100 μ m of 50 μ m.The 3rd virtual reference line L3 interval and the 4th virtual reference line L4 interval b each other is each other set to below the above 100 μ m of 50 μ m.
In the formation of such virtual grid, the intersection point of the intersection point of the 1st virtual reference line L1 and the 3rd virtual reference line L3 and the 2nd virtual reference line L2 and the 4th virtual reference line L4 is set to virtual net lattice point P.In Fig. 6, the intersection point of the part overlapping with black circle (●) or white circle (zero) is corresponding to virtual net lattice point P.
The light guide plate 50 of present embodiment is characterised in that, possesses in a part of the virtual net lattice point P setting as described above mode to meet the relational expression (C) shown in following and configured the 2nd dot pattern 55B of light diffusion point 54.Wherein, in Fig. 6, the virtual net lattice point P1 that is provided with light diffusion point 54 uses the intersection point of the part overlapping with white circle (zero) to represent, the virtual net lattice point P2 that light diffusion point 54 is not set uses the intersection point overlapping with black circle (●) to represent.
The 2nd region A2/ the 1st region A1 >=80%(D)
The 1st region A1 is the region of the scope shown in following relational expression (D).
40%≤(being provided with the quantity of the virtual net lattice point P of the quantity of the virtual net lattice point P1 of light diffusion point 54/whole)≤90%(D)
The 2nd region A2 has X-direction have more than 2a range and have range more than 2b and the region of light diffusion point 54 is not set on whole virtual net lattice point P in Y direction.In the time specifically describing with Fig. 6, such as region A21 and region A22 etc. are equivalent to the 2nd region A2.The length of the X-direction of region A21 is that the length of 4a, Y direction is 2b.The length of the X-direction of region A22 is that the length of 2a, Y direction is 2b.Any one region A21, A22 have range more than 2a in X-direction, and have range more than 2b in Y direction.
; the light guide plate 50 of present embodiment is characterised in that to possess the 2nd dot pattern 55B; the 2nd dot pattern 55B is being provided with in the 1st region A1 that the virtual net lattice point of light diffusion point 54 (configuration virtual net point) P1 is 40%～90% with respect to the ratio of whole virtual net lattice point P, the pattern that more than 80% belongs to the 2nd region A2 of virtual net lattice point (the blank virtual net lattice point) P2 of light diffusion point 54 is not set.In the 2nd dot pattern 55B, can be also do not arrange light diffusion point 54 virtual net lattice point P2 more than 90% belong to the 2nd region A2.Thus, even in the case of the shape entanglement of light diffusion point 54 that is arranged at light diffusion face 51a, also can further suppress by visual confirmation is inhomogeneous part.In addition, in the 2nd dot pattern 55B, can be also that whole (100%) that the virtual net lattice point P2 of light diffusion point 54 is not set belong to the 2nd region A2.Thus, even in the case of the shape entanglement of light diffusion point 54 that is arranged at light diffusion face 51a, also can further suppress by visual confirmation is inhomogeneous part.
Wherein, in Fig. 6, represent that the size of the white circle (zero) of the virtual net lattice point P1 that is provided with light diffusion point 54 is not the size that represents the diameter of the light diffusion point 54 that is disposed at this virtual net lattice point P1.As mentioned above, the diameter of light diffusion point 54 is adjusted to and makes the light penetrating from exit facet 51b become uniform planar light.The diameter of light diffusion point 54 is roughly below the above 90 μ m of 10 μ m.
The characteristic of the 2nd dot pattern 55B above-mentioned light guide plate 50 being possessed from other sides describes., as shown in Figure 6, in the 2nd dot pattern 55A possessing in the light guide plate 50 of present embodiment, blank virtual net lattice point P2's more than 80% is that in the virtual net lattice point P being adjacent, at least 3 points are blank virtual net lattice point P2., " at least 3 blank virtual net lattice point P2 that point is blank virtual net lattice point P2 in the virtual net lattice point P of adjacency " are more than 80% with respect to the ratio of " whole blank virtual net lattice point P2 ".In the 2nd dot pattern 55B, " at least 3 blank virtual net lattice point P2 that point is blank virtual net lattice point P2 in the virtual net lattice point P of adjacency " can be set as more than 90% with respect to the ratio of " whole blank virtual net lattice point P2 ".Thus, even in the case of the shape entanglement of light diffusion point 54 that is arranged at light diffusion face 51a, also can further suppress by visual confirmation is inhomogeneous part.In addition, in the 2nd dot pattern 55B, " at least 3 blank virtual net lattice point P2 that point is blank virtual net lattice point P2 in the virtual net lattice point P of adjacency " can be set as to 100% with respect to the ratio of " whole blank virtual net lattice point P2 ".Thus, even in the case of the shape entanglement of light diffusion point 54 that is arranged at light diffusion face 51a, also can further suppress by visual confirmation is inhomogeneous part.
The characteristic of the 2nd dot pattern 55B further from other sides, above-mentioned light guide plate 50 being possessed describes., as shown in Figure 6, in the 2nd dot pattern 66B possessing in the light guide plate 50 of present embodiment, the virtual net lattice point P of adjacency whole are that the blank virtual net lattice point P2 of configuration virtual net point P1 is less than 20%., " the whole of the virtual net lattice point P of adjacency are configuration virtual net point P1 of configuration virtual net point P1 " is less than 20% with respect to the ratio of " whole configuration virtual net point P1 ".In the 2nd dot pattern 55B, can be that the blank virtual net lattice point P2 of configuration virtual net point P1 is made as below 10% by the virtual net lattice point P of adjacency whole.Thus, even in the case of the shape entanglement of light diffusion point 54 that is arranged at light diffusion face 51a, also can further suppress by visual confirmation is inhomogeneous part.In addition, in the 2nd dot pattern 55B, can be that the blank virtual net lattice point P2 of configuration virtual net point P1 is set as 0 by the virtual net lattice point P of adjacency whole.Thus, even in the case of the shape entanglement of light diffusion point 54 that is arranged at light diffusion face 51a, also can further suppress by visual confirmation is inhomogeneous part.
Wherein, " the virtual net lattice point P of adjacency " of above-mentioned explanation refers to: apart from be arranged in as the distance of the virtual net lattice point P of object than the interval of the 1st virtual reference line L1 and the 2nd virtual reference line L2 be a and the 3rd virtual reference line L3 each other or the 4th virtual reference line L4 interval be each other the virtual net lattice point P of any larger side's of b the distance of 2 times little.
(the 3rd dot pattern)
Next, use Fig. 3 to describe the 3rd dot pattern.Particularly, in the 3rd dot pattern, for the 1st～4th virtual reference line L1～L4, only the condition (3) in the condition of the 1st dot pattern 55A (1)～(6) is different setting.Below this different condition is expressed as to condition (23).
(23) the 1st virtual reference line L1 being parallel to each other and the 2nd virtual reference line L2 be by alternate configurations, and uniformly-spaced configured, and its interval is b/cos30 ° (=1.155b).
In the formation of such virtual grid, in the 3rd dot pattern, the dive intersection point of line L3 and the intersection point of the 2nd virtual reference line L2 and the 4th virtual reference line L4 of the 1st virtual reference line L1 and the 3rd virtual base is set as to virtual net lattice point P.The light guide plate 50 of present embodiment is characterised in that to possess in a part of the virtual net lattice point P setting as described above, has configured the 3rd dot pattern of light diffusion point 54 to meet the mode of following condition.; be characterised in that: possess being provided with in the 1st region A1 that the virtual net lattice point of light diffusion point 54 (configuration virtual net point) P1 is 40%～90% with respect to the ratio of whole virtual net lattice point P, the 3rd dot pattern that more than 80% belongs to the 2nd region A2 of virtual net lattice point (the blank virtual net lattice point) P2 of light diffusion point 54 is not set.
Possessing in the light guide plate of above-mentioned dot pattern (any one of the 1st～3rd dot pattern), 40%～90% in virtual net lattice point is provided with in the 1st region of light diffusion point, have more than 2a range and have range more than 2b and whole virtual net lattice points is not configured to the 2nd region of light diffusion point in the 1st direction more than 80% the belonging in the 2nd direction of virtual net lattice point that light diffusion point is not set.Thus, even for example because the surface of light guide plate base material exists contaminated place, or there is inhomogeneous place and make the diffusive condition of light diffusion point changes in the processing of light guide plate raw sheet before printing, also can suppress compared with light diffusion point is around bright point by visual confirmation, or is that dark point is identified as inhomogeneous part by visual confirmation.
In addition, having printed by ink-jet method in the light guide plate of dot pattern, sometimes because being arranged in nozzle on the head interval each other inhomogeneous part that to be offset a little by visual confirmation be striated.Possessing in the light guide plate of above-mentioned dot pattern (any one of the 1st～3rd dot pattern), the inhomogeneous part that can suppress such striated is identified.
Above an embodiment of the invention are illustrated, but the present invention is not limited to above-mentioned embodiment, can carries out various changes in the scope that does not depart from inventive concept.In the light guide plate 50 of above-mentioned embodiment, the dot pattern 55A(55B being made up of light diffusion point 54 in the face setting with exit facet 51b opposition side of light guide plate base material 51 has been described) example, but be not limited thereto.
Description of reference numerals: 10 ... transmission-type image display device, 20 ... transmission-type image displaying part, 21 ... liquid crystal cells, 22, 23 ... Polarizer, 30 ... planar light source device, 40 ... optics, 50 ... light guide plate, 51 ... light guide plate base material, 51a ... light diffusion face, 51b ... exit facet, 51c, 51d, 51e, 51f ... end face, 54 ... light diffusion point, 55A ... the 1st dot pattern (dot pattern), 55B ... the 2nd dot pattern (dot pattern), 60 ... light source portion, 61 ... point source of light, 70 ... reflecting plate, P ... virtual net lattice point, P1 ... be provided with the virtual net lattice point (configuration virtual net point) of light diffusion point, P2 ... the virtual net lattice point (blank virtual net lattice point) of light diffusion point is not set.
Claims (3)
1. a light guide plate, is to be provided with the light guide plate for the light diffusion point of the above-mentioned light of diffusion as propagating on the light diffusion face of a face of light guide plate base material of light, and this light guide plate is characterised in that,
Possess dot pattern, this dot pattern is that above-mentioned light diffusion face is being set to 1st virtual reference line and 2nd virtual reference line, the 3rd virtual reference line that be parallel to above-mentioned 1st direction orthogonal 2nd direction and the 4th virtual reference line parallel with the 1st direction, and,
Set following virtual grid: above-mentioned the 1st virtual reference line being parallel to each other and above-mentioned the 2nd virtual reference line are by alternate configurations and uniformly-spaced configured, above-mentioned the 3rd virtual reference line is uniformly-spaced configured, the interval of above-mentioned the 1st virtual reference line L1 and above-mentioned the 2nd virtual reference line L2 is being made as to a, when above-mentioned the 3rd virtual reference line L3 interval is each other made as to b, be configured to sky with above-mentioned the 4th virtual reference line of above-mentioned the 3rd virtual reference line parallel and open the distance apart from above-mentioned the 3rd virtual reference line 0 above b/2, and above-mentioned the 4th virtual reference line is equally spaced configured each other, its interval is in the situation of b, at the intersection point as above-mentioned the 1st virtual reference line and above-mentioned the 3rd virtual reference line, and in a part in the virtual net lattice point of the intersection point of above-mentioned the 2nd virtual reference line and above-mentioned the 4th virtual reference line, be provided with the dot pattern of above-mentioned light diffusion point,
On 40%～90% above-mentioned virtual net lattice point in whole above-mentioned virtual net lattice point of above-mentioned dot pattern, be provided with in the 1st region of above-mentioned light diffusion point, the overwhelming majority that the above-mentioned virtual net lattice point of above-mentioned light diffusion point is not set belongs to the 2nd region,
Above-mentioned the 2nd region is have more than 2a range and have range more than 2b and on whole above-mentioned virtual net lattice points, do not configure the region of above-mentioned light diffusion point in above-mentioned the 1st direction in above-mentioned the 2nd direction.
2. a planar light source device, is characterized in that,
Possess light guide plate claimed in claim 1 and with above-mentioned light guide plate in end face arranged opposite and supply with the light source portion of light to above-mentioned end face.
3. a transmission-type image display device, is characterized in that, possesses:
Light guide plate claimed in claim 1;
With end face arranged opposite in above-mentioned light guide plate and supply with the light source portion of light to above-mentioned end face; And
Be disposed at the exit facet side of above-mentioned light guide plate, shown the transmission-type image displaying part of image from the optical illumination of above-mentioned light guide plate outgoing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210421149.8A CN103792612A (en) | 2012-10-29 | 2012-10-29 | Light guide plate, area source device with light guide plate and transmission-type image display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210421149.8A CN103792612A (en) | 2012-10-29 | 2012-10-29 | Light guide plate, area source device with light guide plate and transmission-type image display device |
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| CN103792612A true CN103792612A (en) | 2014-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210421149.8A Pending CN103792612A (en) | 2012-10-29 | 2012-10-29 | Light guide plate, area source device with light guide plate and transmission-type image display device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1379273A (en) * | 2001-03-29 | 2002-11-13 | 恩普乐股份有限公司 | Light conducting plate, surface light source device and liquid crystal display device |
| CN1387075A (en) * | 2001-05-22 | 2002-12-25 | 日亚化学工业株式会社 | Light guide plate of face luminous device |
| JP2012004023A (en) * | 2010-06-18 | 2012-01-05 | Sharp Corp | Light source module and electronic equipment equipped with the same |
| JP2012059645A (en) * | 2010-09-10 | 2012-03-22 | Fujikura Ltd | Planar light-emitting device and lighting module |
| CN102565919A (en) * | 2010-12-28 | 2012-07-11 | 住友化学株式会社 | Light guide plate, surface light source device, and transmission image display device |
-
2012
- 2012-10-29 CN CN201210421149.8A patent/CN103792612A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1379273A (en) * | 2001-03-29 | 2002-11-13 | 恩普乐股份有限公司 | Light conducting plate, surface light source device and liquid crystal display device |
| CN1387075A (en) * | 2001-05-22 | 2002-12-25 | 日亚化学工业株式会社 | Light guide plate of face luminous device |
| JP2012004023A (en) * | 2010-06-18 | 2012-01-05 | Sharp Corp | Light source module and electronic equipment equipped with the same |
| JP2012059645A (en) * | 2010-09-10 | 2012-03-22 | Fujikura Ltd | Planar light-emitting device and lighting module |
| CN102565919A (en) * | 2010-12-28 | 2012-07-11 | 住友化学株式会社 | Light guide plate, surface light source device, and transmission image display device |
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Application publication date: 20140514 |