CN101477216B - Diffusing plate, backlight module and display equipment - Google Patents
Diffusing plate, backlight module and display equipment Download PDFInfo
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- CN101477216B CN101477216B CN2009100050527A CN200910005052A CN101477216B CN 101477216 B CN101477216 B CN 101477216B CN 2009100050527 A CN2009100050527 A CN 2009100050527A CN 200910005052 A CN200910005052 A CN 200910005052A CN 101477216 B CN101477216 B CN 101477216B
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Abstract
The invention discloses a diffuser plate, which comprises a light exit surface, wherein the light exit surface comprises a plurality of periodic structures. The periodic structures are arranged on the light exit surface in a crossed mode. Each periodic structure comprises one or a plurality of identical or a plurality of different primary linear convex part arrays and one or a plurality of identical or a plurality of different secondary linear convex part arrays, wherein the arrays are arranged parallelly. The cross sections of the primary linear convex parts and the secondary linear convex parts are in angular shapes, so that a plurality of pyramid-shaped concave parts which are arranged in lines are formed on the light exit surface. The height of the primary linear convex parts is larger than that of the secondary linear convex parts.
Description
Technical field
The present invention is about a kind of diffuser plate, particularly about having difformity on a kind of surface, mutual pyramidal diffuser plate of arranging and backlight module and the display device of utilizing this diffuser plate.
Background technology
Lcd technology is widely applied to various fields, for example: TV, portable device, digital camera and computer screen etc.But,, therefore need come show image from its light-emitting device or " backlight module " behind by one because LCD itself is not luminous.
Traditionally, backlight module with cold cathode fluorescent lamp as its light source.Yet, because the plurality of advantages of light emitting diode seemingly has the development trend that replaces cold cathode fluorescent lamp with light emitting diode., no matter use which kind of light source, the optical uniformity of backlight module must meet the display requirement of LCD MODULE.Therefore, as if being the backlight module of light source with the light emitting diode, how making the luminous even of light emitting diode, is one of developing important topic.
Fig. 1 shows the light-emitting diode (LED) backlight module 10 of a conventional art.Make the luminous of light emitting diode 11 can offer display module equably, need utilize diffuser plate 12 and place the optical diaphragm group 14 of diffuser plate 12 tops to reach, wherein can have a plurality of pyramidal recesses on the surface of diffuser plate 12, help light dispersing in diffuser plate 12 whereby, 14 of optical diaphragm group can comprise the blooming piece that a slice is above, for example: the combination of brightening piece, diffusion sheet, reflection-type polarisation brightening piece or above-mentioned film group.Yet the luminous uniformity coefficient of light-emitting diode (LED) backlight module 10 is influenced by the ratio of the distance D 1 of 11 of the spacing W1 of 11 of light emitting diodes and diffuser plate 12 and light emitting diodes etc., and the usage quantity of this influence decision diffuser plate 12.That is to say,, then only use a slice diffuser plate 12 just to be enough to make light uniformization at 1.25 o'clock if W1/D1 is less than or equal to; If when W1/D1 greater than 1.25 the time, it is luminous uniformly then to need two diffuser plates 12 and 13 that display module is obtained, or even the diffuser plate more than two.
Yet along with the requirement of energy-conservationization, the usage quantity of light emitting diode 11 will reduce, and under the situation of using onesize display module, the spacing W1 that light emitting diode is 11 will increase.When the spacing increase makes W1/D1 surpass 1.25,, then must use two diffuser plates 12 and 13 in order to keep certain luminous uniformity coefficient.Though, the quantity that increases diffuser plate 12 and 13 can make luminous evenly, along with the consumption of diffuser plate 12 and 13 increases, the cost of light-emitting diode (LED) backlight module 10 also rises thereupon.
In sum, light-emitting diode (LED) backlight module utilizes diffuser plate and the optical diaphragm group that places the diffuser plate top to reach the purpose of light uniformization at present, though the configurable a plurality of pyramidal recess that helps light to disperse of being used on the diffuser plate, yet, still be not enough to solve when between light emitting diode or after the change of the geometric proportion between light emitting diode and diffuser plate, cause influence the light uniformity coefficient.Therefore, still remain the exploitation of new technology in this respect.
Summary of the invention
The invention provides a kind of diffuser plate, and backlight module and the display device of using this diffuser plate, this diffuser plate utilization varies in size, the microstructure of cross-over configuration and hair line line, reduce when between light emitting diode or after the change of the geometric proportion between light emitting diode and diffuser plate, cause is to the influence of light uniformity coefficient.
A kind of first diffuser plate of one embodiment of the invention comprises an incidence surface and an exiting surface corresponding to this incidence surface, and this exiting surface comprises many periodic structures.Described periodic structure cross-over configuration makes and forms a plurality of pyramid-shaped recesses that ranks are arranged that are on this exiting surface in this exiting surface.Comprise one or more identical or a plurality of different main line shape protuberance permutation and combination and one or more identical or a plurality of different inferior wire protuberance permutation and combination in each periodic structure, wherein this main line shape protuberance and this time wire protuberance are arranged side by side.Be angular owing to vertically be transverse to the xsect of this main line shape protuberance and this time wire protuberance, make and form a plurality of pyramid-shaped recesses that ranks are arranged that are on this exiting surface.The height of this main line shape protuberance is greater than the height of this time wire protuberance.
A kind of first backlight module of one embodiment of the invention comprises a substrate, a plurality of light emitting diode, one first diffuser plate and optical diaphragm group as the aforementioned.Dot matrix LEDs is arranged on this substrate.Diffuser plate is configured on the light emitting diode.Optical diaphragm group is configured on the diffuser plate.
A kind of first display device of one embodiment of the invention comprises first backlight module and a display panel as the aforementioned.Display panel configurations is on this backlight module.
A kind of second diffuser plate of one embodiment of the invention comprises an incidence surface, an exiting surface, a main line shape protuberance and a wire protuberance.This incidence surface is corresponding to this exiting surface.This main line shape protuberance is disposed at this exiting surface, and has a main vertex angle theta 1 and a main height H 1.This time wire protuberance is disposed on this exiting surface, and adjacent with this main line shape protuberance, and has a vertex angle theta 2 and a height H 2, and wherein, this main vertex angle theta 1 is greater than this time vertex angle theta 2, and this main height H 1 is greater than this time height H 2.
A kind of the 3rd diffuser plate of one embodiment of the invention comprises an incidence surface, an exiting surface, a plurality of main line shape protuberance and a plurality of wire protuberances.This incidence surface is corresponding to this exiting surface.A plurality of main line shape protuberances are disposed on this exiting surface, and one of those main line shape protuberances have a main height H 1 and a main base portion length L 1, and 0.3＜H1/L1＜0.4.A plurality of times the wire protuberance is configured on this exiting surface, and one of those times wire protuberance is adjacent with this main line shape protuberance, has a height H 2 and a base portion length L 2, and 0.4≤H2/L2≤0.7, and wherein, this main height H 1 is greater than this time height H 2.
A kind of second backlight module of one embodiment of the invention comprises a substrate, a plurality of light emitting diode, aforesaid second diffuser plate or aforesaid the 3rd diffuser plate and optical diaphragm group.Those dot matrix LEDss are arranged on this substrate, and the spacing between adjacent those light emitting diodes is W1.Aforesaid second diffuser plate or aforesaid the 3rd diffuser plate are corresponding to those light emitting diode configurations, and wherein the distance between this diffuser plate and those light emitting diodes is D1, and 1.25＜W1/D1＜1.5.This optical diaphragm group is corresponding to aforesaid second diffuser plate or aforesaid the 3rd diffuser plate setting.
A kind of second display device of another embodiment of the present invention comprises second backlight module and a display panel as the aforementioned.Display panel is corresponding to this backlight module configuration.
Description of drawings
Fig. 1 shows the light-emitting diode (LED) backlight module of a conventional art;
Fig. 2 shows that the present invention one implements the part schematic perspective view of the diffuser plate of example;
The vertical view of the diffuser plate of Fig. 3 displayed map 2;
Fig. 4 is the partial enlarged drawing of the a-quadrant of Fig. 3;
Fig. 5 is the sectional view of Fig. 4 along the 1-1 profile line;
Fig. 6 is the sectional view of Fig. 4 along the 2-2 profile line;
Fig. 7 shows that the present invention one implements the incidence surface synoptic diagram of the diffuser plate of example;
The synoptic diagram of the uniformization effect of the diffuser plate of Fig. 8 A to Fig. 8 C demonstration the present invention one enforcement example;
Fig. 9 to 11 shows the cross-sectional schematic of the periodic structure of other embodiments of the invention; And
Figure 12 shows the synoptic diagram of the display device of one embodiment of the invention.
The main element symbol description
10 light-emitting diode (LED) backlight modules
11 light emitting diodes
12,13 diffuser plates
14 optical diaphragm group
20 diffuser plates
21 exiting surfaces
22 incidence surfaces
23,23a, 23b, 23c, 23d main line shape protuberance
24,24a, 24b, 24c, 24d, 24e wire protuberance
25,25a, 25b, 25c, 25d pyramid-shaped recess
50,50a, 50b, 50c periodic structure
51a, 51b, 51c, 51d bottom
52,53a, 53b top
54 datum lines
71 hair line lines
80 light emitting diode matrixs
93 sides
120 display device
121 backlight modules
122 display panels
123 substrates
124 light emitting diodes
125 diffuser plates
126 optical diaphragm group
127 reflector plates
Embodiment
Fig. 2 shows that the present invention one implements the schematic perspective view of the diffuser plate 20 of example.Fig. 3 shows that the present invention one implements the vertical view of the diffuser plate 20 of example.Diffuser plate 20 disclosed by the invention comprises an exiting surface 21, incidence surface 22, many main line shape protuberances 23 and many wire protuberances 24.This incidence surface 22 and these exiting surface 21 relative configurations.The drift angle of described main line shape protuberance 23 and described wire protuberance 24 is with highly different, and in the mode of one-period property arrangement, form the one-period structure, and along two directions (x direction and y direction) cross-over configuration on exiting surface 21, wherein this two direction can be vertical or presss from both sides a predetermined angular, and the present invention is not as limit.Described the less drift angle of wire protuberance 24 tools, thus light can be dispersed to position far away, and described main line shape protuberance 23 can be dispersed to light nearer position.Mixing by described main line shape protuberance 23 and described wire protuberance 24 is used, can increase the ability that light disperses, thereby solve when W1/D1 surpasses 1.25, can't only use single diffuser plate 20 promptly to reach and make the finely dispersed problem of light, particularly when 1.25＜W1/D1＜1.5, only a slice diffuser plate 20 need be used, the effect of two diffusion sheets 12,13 of tradition can be reached.Utilization is disposed drift angle alternately with highly different main line shape protuberance 23 and described wire protuberance 24, can make described time more weak wire protuberance of structural strength 24 obtain the protection of the stronger main line shape protuberance 23 of structural strengths, increases the durability of diffuser plate 20.
The xsect that vertically is transverse to each described main line shape protuberance 23 and each described wire protuberance 24 is angular, and because described main line shape protuberance 23 and described wire protuberance 24 are in abutting connection with arranging, forming a plurality of ranks arrangement, variform pyramid-shaped recesses 25 of being on this exiting surface 21 so make.
Fig. 3 illustrates the top view of the diffuser plate 20 of one embodiment of the invention; Fig. 4 illustrates the partial enlarged drawing of a-quadrant among Fig. 3; Fig. 5 illustrates among Fig. 4 the sectional view (along each described main line shape protuberance 23 of the vertical crosscut of x direction and each described wire protuberance 24) along the 1-1 profile line; Fig. 6 illustrates among Fig. 4 the sectional view (along each described main line shape protuberance 23 of the vertical crosscut of y direction and each described wire protuberance 24) along the 2-2 profile line.Periodic structure 50 (as shown in Figure 5) comprises a main line shape protuberance 23 and a wire protuberance 24.In this case embodiment, periodic structure 50 comprises a main line shape protuberance 23 and two time wire protuberance 24a and 24b, and wherein time wire protuberance 24a and 24b be height to main line shape protuberance 23.Article two, time wire protuberance 24a and 24b can identical (as shown in Figure 5).In the present invention, main line shape protuberance 23 need satisfy some conditions with the height of time wire protuberance 24b, and the height of main line shape protuberance 23 and time wire protuberance 24b can use a datum line 54 to make, this datum line 54 is a virtual reference line, be used for the difference between comparison main line shape protuberance 23 and time wire protuberance 24, so can select for use according to the demand of reality, the present invention is not as limit.If selecting with the line between the bottom 51d of the bottom 51a of pyramid-shaped recess 25a and pyramid-shaped recess 25d is datum line 54, then the height of main line shape protuberance 23 can be by the top 52 of main line shape protuberance 23 height H 1 representative to datum line 54; And the height of inferior wire protuberance 24b can be by the top 53b of inferior wire protuberance 24b height H 2 representatives to datum line 54, and wherein this both heights preferably satisfies H1-H2＞1 micron in the present invention, and condition such as H1-H2＜H2/5.
In the present invention, main line shape protuberance 23 also limits to some extent with other physical dimensions of time wire protuberance 24a, 24b.With reference to Fig. 5, the xsect of main line shape protuberance 23 is angular, and it has a main vertex angle theta 1; The xsect of inferior wire protuberance 24a and 24b also is angular, and it has vertex angle theta 2 one time, and wherein θ 1 and θ 2 need satisfy the condition of θ 1＞θ 2.Among one embodiment, θ 1 can be between 102 ° to 119 °; θ 2 can be between 70 ° to 103 °.Among another embodiment, θ 1 and θ 2 need satisfy the condition of 2＜90 °≤θ of θ 1, and promptly main vertex angle theta 1 is more than or equal to 90 °, and inferior vertex angle theta 2 is then less than 90 °.
With reference to Fig. 5, the length of the base portion of main line shape protuberance 23 is L1; The length of the base portion of inferior wire protuberance 24a and 24b is L2, and wherein L1 is greater than L2.Moreover, the height H 1 of main line shape protuberance 23 and the length of its base portion are that the scope of the ratio of L1 needs less than 0.4, i.e. H1/L1＜0.4, and in one embodiment, the length of overhead height H1 and base portion is that the scope of the ratio of L1 can be between 0.3 and 0.4, i.e. 0.3＜H1/L1＜0.4.The height H 2 of each time wire protuberance 24b and the length of its base portion are that the scope of the ratio of L2 needs more than or equal to 0.4, it is H2/L2 〉=0.4, and in one embodiment, the length of overhead height H2 and base portion is that the scope of the ratio of L2 can be between 0.4 and 0.7, i.e. 0.4≤H2/L2≤0.7.
With reference to Fig. 5, pyramid-shaped recess 25b in the periodic structure 50 and the bottom 51b of 25c and 51c generally can't all be located on the same datum line 54 when making.Thus, be positioned at main line shape protuberance 23 both sides, laterally the bottom 51a of corresponding pyramid-shaped recess 25a and pyramid-shaped recess 25b is different with H1 ' to the vertical range H1 at the top 52 of this main line shape protuberance 23 with bottom 51b.Among the embodiment of this case, the top 52 of main line shape protuberance 23 be positioned at main line shape protuberance 23 both sides, laterally between the bottom 51a and 51b of corresponding pyramid-shaped recess 25a and pyramid-shaped recess 25b, both vertical range differences are no more than the height of main line shape protuberance 23, and (top 52 of main line shape protuberance 23 is to the vertical range of datum line 54; H1) 1/5th, promptly | H1-H1 ' |＜H1/5.In addition, the top 53b of inferior wire protuberance 24b be positioned at time wire protuberance 24b both sides, laterally between the bottom 51d of the bottom 51c of corresponding pyramid-shaped recess 25c and pyramid-shaped recess 25d, (the top 53b of inferior wire protuberance 24b is to the vertical range of datum line 54 less than the height of inferior wire protuberance 24b for both vertical range differences; H2) 1/5th, promptly | H2-H2 ' |＜H2/5.When H1 '＞H1 and H2 '＞H2, the top 53a that can make time wire protuberance 24b is compared to the pyramid-shaped recess 25b of both sides and bottom 51b and the 51c of 25c, and is more outstanding.Yet, in other embodiments, | H1-H1 ' | or | H2-H2 ' | can dwindle as far as possible, its most zero, avoiding the difference between each main line shape protuberance 23 or each time wire protuberance 24 excessive, and be difficult for grasping the homogeneity of briliancy.In like manner, the relation of above-mentioned vertical range difference also may be used on other side of main line shape protuberance 23 or inferior wire protuberance 24, and the present invention is not as limit.
With reference to Fig. 6, Fig. 6 is for showing the sectional view along the y direction.In this embodiment, because the periodic structure 50 of alignment arrangements is identical with the x direction on the y direction,, so repeat no more so the periodic structure 50 of the condition of the size of being correlated with and requirement and Fig. 5 is identical.
Fig. 7 shows that the present invention one implements incidence surface 22 synoptic diagram of the diffuser plate 20 of example.The incidence surface 22 of diffuser plate 20 can be provided with a hair line line 71.This hair line line 71 is to form the die surface of the incidence surface 22 of diffuser plate 20, produce for rough many parallel lines lines on the direction with abrasive machine, and diffuser plate 20 is after completing, be about to this lines lines transfer printing on its incidence surface 22 and arrange, and extend this hair line line 71 of configuration along another horizontal direction (y direction) to form along a horizontal direction (x direction).In one embodiment, the edge is perpendicular to y orientation measurement center line average roughness Ra, and promptly along x orientation measurement center line average roughness Ra, the scope of the center line average roughness Ra that then measures can be between 0.002 micron and 2 microns.In addition, by the numerical value change of the center line average roughness Ra of this hair line line, can adjust the light dispersibility of extending the direction (y direction) of configuration perpendicular to the hair line line, can adjust the light dispersibility of x direction, the numerical value of center line average roughness Ra is big more, and the light dispersion distance is near more; And in this case embodiment, the roughness of this hair line line 71 can be between 0.5 micron and 0.6 micron.
The synoptic diagram of the uniformization effect of the diffuser plate of Fig. 8 A to Fig. 8 C demonstration the present invention one enforcement example.With reference to Fig. 8 A, a plurality of dot matrix LEDss are arranged in a light emitting diode matrix 80, and the distance between adjacent light emitting diode is rough identical, and for example, this distance can be 30 centimetres.
With reference to Fig. 8 B, one diffuser plate 20 that is provided with the periodic structure 50 shown in Fig. 5 embodiment is placed on the light emitting diode matrix 80 shown in Fig. 8 A, because this periodic structure 50 comprises a main line shape protuberance 23 and two time wire protuberance 24a and 24b, wherein main line shape protuberance 23 inferior wire protuberance 24a and 24b are high, and the drift angle angle of main line shape protuberance 23 inferior wire protuberance 24a and 24b is big cause, so allow the luminous of each light emitting diode be polymerized on the different positions, make and between adjacent light emitting diode, can form four luminous points, reach the purpose that makes light uniformization whereby, the quantity of luminous point is relevant with the drift angle angle of main line shape protuberance 23 and inferior wire protuberance 24a and 24b, might not be four.Wherein, the pairing luminous point of each light emitting diode, four luminous point sizes between its diameter and the adjacent light emitting diode are similar, but brightness is lower.
With reference to Fig. 8 C, after exiting surface is provided with diffuser plate that periodic structure 50 shown in Fig. 5 embodiment and incidence surface be provided with hair line line 71 as shown in Figure 7 and places on the light emitting diode matrix 80 shown in Fig. 8 A, except that the The above results that periodic structure 50 is produced, the luminous of each luminous point that hair line line 71 can make the luminous of light emitting diode and Fig. 8 B show spread on hair line line 71 vertical direction, form the cancellated optical image shown in Fig. 8 C at last, in the wherein cancellated optical image, directly to being the place of light emitting diode with lateral light shadow intersection.If optical diaphragm group is applied on the diffuser plate, this optical diaphragm group can reach minimum discernable difference (Just Noticeable Difference at last with the further homogenising of this cancellated optical image again; JND) 1.8 good result.Also that is to say, when the discernable difference of a device greater than 2 the time, common people's naked eyes can pick out the inhomogeneous of this device briliancy easily, and when the discernable difference of a device less than 2 the time, though in fact this device still has uneven phenomenon to exist, but reached the degree that naked eyes can't identification, so periodic structure disclosed by the invention 50 cooperates the configuration of hair line line 71 can obtain the effect of good light uniformization again.
Fig. 9 to 11 shows the cross-sectional schematic of the periodic structure 50a-50c of other embodiments of the invention.With reference to Fig. 9, included main line shape protuberance 23a, 23b of periodic structure 50a and time wire protuberance 24c can be had different shapes.With Fig. 9 embodiment, among the main line shape protuberance 23a, side is pressed from both sides the two sides 93 of main vertex angle theta or other side except that the plane that shows as Fig. 5 embodiment, also can be convex surface, and the side of inferior wire protuberance 24c is also with can be convex surface.Moreover periodic structure 50a can comprise two main line shape protuberance 23a, 23b and a wire protuberance 24c, and wherein time wire protuberance 24c places between two main line shape protuberance 23a, the 23b.With this periodic structure 50a structural arrangement, can obtain two main line shape protuberance 23a, result that 23b is adjacent.With reference to Figure 10 and 11, two sides or other side of main line shape protuberance 23c and 23d and time wire protuberance 24d and 24e can be made into concave surface (as shown in figure 10) respectively, perhaps are continuous male and fomale(M﹠F) (as shown in figure 11).
Figure 12 shows the synoptic diagram of the display device 120 of one embodiment of the invention.Display device 120 comprises that one is used to provide the display panel 122 and of show image in order to the backlight module 121 of these display panel 122 light sources to be provided.Backlight module 121 comprises that a substrate 123, arranged are configured in the diffuser plate 125 on the described light emitting diode 124 and are configured in an optical diaphragm group 126, a reflector plate 127 on this diffuser plate 125 at a plurality of light emitting diodes on this substrate 123 124.Substrate 123 can be circuit board, in order to providing described light emitting diode 124 required power supply, or is common metal/plastic plate, only passes through for described light emitting diode 124 required power supply piggybackings, and does not directly provide.Reflector plate 127 also is configured on the substrate 123, and is run through by described light emitting diode 124, or between described light emitting diode 124 or the next door, it preferably can be white reflector plate.Face on the diffuser plate 125 on the exiting surface of optical diaphragm group 126 and comprise aforesaid periodic structure, this periodic structure cross-over configuration makes and forms a plurality of pyramid-shaped recesses that ranks are arranged that are on this exiting surface in this exiting surface.Comprise of arrangement arranged side by side or several are identical or several are different main line shape protuberance permutation and combination and one or several are identical or several are different inferior wire protuberance permutation and combination in this periodic structure.Face on the diffuser plate 125 on the incidence surface of light emitting diode 124 and can be provided with aforesaid hair line line.Utilize this periodic structure and this hair line line, can make backlight module 121, or reduce diffuser plate 125 produces non-uniform light to the height of light emitting diode 124 situation not because of the spacing of light emitting diode 124 strengthens.
Technology contents of the present invention and technical characterstic are open as above, yet those skilled in the art still may reach openly and do all replacement and modifications that does not deviate from spirit of the present invention based on teaching of the present invention.Therefore, protection scope of the present invention should be not limited to the disclosed person of embodiment, and should comprise various do not deviate from replacement of the present invention and modifications, and is contained by claims.
Claims (15)
1. diffuser plate comprises:
One incidence surface; And
One exiting surface corresponding to this incidence surface configuration, comprises many by a main line shape protuberance and a wire protuberance periodic structure of forming arranged side by side;
Wherein, the xsect that vertically is transverse to this main line shape protuberance and this time wire protuberance is angular, described periodic structure cross-over configuration is in this exiting surface, make and form a plurality of pyramid-shaped recesses that ranks are arranged that are on this exiting surface, and the height of this main line shape protuberance is greater than the height of this time wire protuberance, and the drift angle of this main line shape protuberance is greater than the drift angle of this time wire protuberance.
2. diffuser plate comprises:
One incidence surface;
One exiting surface is corresponding to this incidence surface configuration;
One main line shape protuberance is disposed on this exiting surface, has a main vertex angle theta 1 and a main height H 1; And
A wire protuberance is disposed on this exiting surface, and is adjacent with this main line shape protuberance, has a vertex angle theta 2 and a height H 2;
Wherein, this main vertex angle theta 1 is greater than this time vertex angle theta 2, and this main height H 1 is greater than this time height H 2,
Wherein, described main line shape protuberance and described wire protuberance form the one-period structure in the mode of one-period property arrangement, and along two directions cross-over configuration on exiting surface.
3. diffuser plate according to claim 2, wherein the scope of this main vertex angle theta 1 is between 102 ° and 119 °.
4. diffuser plate according to claim 2, wherein the scope of this time vertex angle theta 2 is between 70 ° and 103 °.
5. diffuser plate according to claim 2, wherein this main vertex angle theta 1 is more than or equal to 90 °, and this time vertex angle theta 2 is less than 90 °.
6. diffuser plate comprises:
One incidence surface;
One exiting surface is corresponding to this incidence surface configuration;
A plurality of main line shape protuberances are disposed on this exiting surface, and one of those main line shape protuberances have a main height H 1 and a main base portion length L 1, and 0.3＜H1/L1＜0.4; And
A plurality of wire protuberances are disposed on this exiting surface, and one of those times wire protuberance is adjacent with this main line shape protuberance, has a height H 2 and a base portion length L 2, and 0.4≤H2/L2≤0.7; Wherein, this main height H 1 is greater than this time height H 2,
Wherein, described main line shape protuberance and described wire protuberance form the one-period structure in the mode of one-period property arrangement, and along two directions cross-over configuration on exiting surface.
7. diffuser plate according to claim 6, wherein this main base portion length L 1 is greater than this time base portion length L 2.
8. diffuser plate according to claim 6, the difference in height of this main height H 1 and this time height H 2 wherein is greater than 1 micron and less than 1/5th of this time height H 2.
9. diffuser plate according to claim 6, wherein the measures of dispersion between those main height H 1 is less than 1/5th of this main height H 1.
10. diffuser plate according to claim 6, wherein the measures of dispersion between those times height H 2 is less than 1/5th of this time height H 2.
11. according to the arbitrary described diffuser plate in the claim 1,2 or 6, also comprise a hair line line, be disposed on this incidence surface along horizontal direction extension.
12. diffuser plate according to claim 11, wherein perpendicular to the scope of the center line average roughness of this horizontal direction between 0.002 micron and 2 microns.
13. diffuser plate according to claim 11, the scope of the roughness of wherein said hair line line is between 0.5 micron and 0.6 micron.
14 1 kinds of backlight modules comprise:
One substrate;
A plurality of light emitting diodes, arranged are on this substrate, and the spacing between adjacent those light emitting diodes is W1;
One according to arbitrary described diffuser plate in the claim 1 to 13, and corresponding to the configuration of those light emitting diodes, and the distance between this diffuser plate and those light emitting diodes is D1, and 1.25＜W1/D1＜1.5; And
Optical diaphragm group is corresponding to this diffuser plate configuration.
15. backlight module according to claim 14 comprises that also a reflector plate is disposed on this substrate.
16. a display device comprises:
One according to claim 14 or 15 described backlight modules; And
One display panel is corresponding to this backlight module configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100050527A CN101477216B (en) | 2009-01-21 | 2009-01-21 | Diffusing plate, backlight module and display equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100050527A CN101477216B (en) | 2009-01-21 | 2009-01-21 | Diffusing plate, backlight module and display equipment |
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| CN101477216A CN101477216A (en) | 2009-07-08 |
| CN101477216B true CN101477216B (en) | 2010-12-29 |
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| BRPI0904808A2 (en) * | 2008-07-16 | 2015-06-30 | Sony Corp | Optical element and display device |
| US10451778B2 (en) * | 2014-09-30 | 2019-10-22 | Kuraray Co., Ltd. | Diffuser plate and method for producing diffuser plate |
| CN110391263B (en) * | 2018-04-19 | 2022-06-17 | 群创光电股份有限公司 | Electronic device |
| TWI679474B (en) * | 2018-10-23 | 2019-12-11 | 友達光電股份有限公司 | Anti-light leakage film assembly and display device using thereof |
| TWI710837B (en) * | 2019-11-21 | 2020-11-21 | 友達光電股份有限公司 | Backlight module |
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