CN104880756A - Light guide plate and backlight module - Google Patents
Light guide plate and backlight module Download PDFInfo
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- CN104880756A CN104880756A CN201410067489.4A CN201410067489A CN104880756A CN 104880756 A CN104880756 A CN 104880756A CN 201410067489 A CN201410067489 A CN 201410067489A CN 104880756 A CN104880756 A CN 104880756A
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Abstract
The utility model provides a light guide plate and a backlight module. The light guide plate bottom comprises a first area and a second area which are not overlapped. A screen dot structure is arranged on the light guide plate bottom and comprises a preset screen dot pattern and a solid screen dot structure. The solid screen dot structure comprises a first screen dot group distributed in the first area and a second screen dot group distributed in the second area. The preset screen dot pattern comprises a third screen dot group distributed in the first area and a fourth screen dot group distributed in the second area. The distribution density of the second screen dot group is identical to that of the fourth screen dot group. The screen dot dimension of the second screen dot group is greater than that of the first screen dot group. The screen dot interval of the second screen dot group is greater than that of the first screen dot group.
Description
Technical field
The present invention is about a kind of light guide plate and backlight module.
Background technology
Fig. 4 shows the configuration schematic diagram of the lattice point structure of a known light guide plate.As shown in Figure 4, lattice point structure 102 is arranged at the bottom surface 104 of a light guide plate 100, the contiguous light source 108 of incidence surface 106, bottom surface 104 comprises a first area P of the incidence surface 106 of contiguous the light guide plate 100 and second area Q away from incidence surface 106, and lattice point structure 102 can comprise the one first site group 102a being distributed in first area P and the second site group 102b being distributed in second area Q.Known designs as illustrated in Figure 4, usually the spacing of two neighbour nodes in all regions is all set to identical, such as, in the first site group 102a, the site spacing d1 of wantonly two neighbour nodes is all identical, and site spacing d1 can equal the site spacing d2 of wantonly two neighbour nodes in the second site group 102b, but, along with optical path length increase makes luminous energy decay gradually, network point distribution density need be improved usually to meet optical design requirements in the position (such as away from the second area Q of incidence surface 106) far away in light path, therefore the dot size of the second site group 102b of Known designs obviously can be greater than the dot size of the first site group 102a, cause the site of the second site group 102b too intensive (gap of neighbour node is too small), so when printing net-point, site easily links together and produces scumming problem.
Chinese patent discloses No. CN102323672A and discloses a kind of light guide plate mesh point optimization method, it is according to size of light guide plate and the level interval at neighbour node center and vertical interval, determine the position of each site, and obtain one first dot density according to the position relationship of light source and light guide plate and distribute, obtain the center coordinate of point filling area, shape and area again to determine point filling area, and the dot density of point filling area is changed according to point filling strength, obtain one second dot density distribution.No. TWI247142, TaiWan, China patent announcement discloses a kind of light conducting plate structure, it comprises an incidence surface, a bottom surface, an exiting surface, an end face and two side faces, bottom surface is provided with multiple site, wherein site along Y parallel direction with proportional spacing arrange and arrange along X parallel direction with proportional spacing, site equal and opposite in direction in each row, and in each row the radius size of site according to its place columns according to a function.
Summary of the invention
The invention provides a kind of avoid scumming problem to produce light guide plate and backlight module.
One embodiment of the invention provide a kind of light guide plate, comprise an incidence surface, a bottom surface and a lattice point structure.Incidence surface is suitable for arranging at least one light source, and bottom surface is connected to incidence surface and presss from both sides an angle with incidence surface, and bottom surface at least comprises a first area of contiguous incidence surface and the second area away from incidence surface, and first area and second area are not overlapping.Lattice point structure is arranged at the bottom surface of light guide plate and comprises default stipple pattern and an entity lattice point structure.Entity lattice point structure comprises the one first site group being distributed in first area and the one second site group being distributed in second area, default stipple pattern comprises one the 3rd site group being distributed in first area and one the 4th site group being distributed in second area, and the first site group is identical with the network point distribution of the 3rd site group.Second area can be drawn and be divided into multiple unit area, one area ratio of the site total area in unit area of one area ratio of the site total area of the second site group in unit area and unit area area and the 4th site group and unit area area is identical, the dot size of the second site group is greater than the dot size of the first site group, and the site spacing of the second site group is greater than the site spacing of the first site group.
In an embodiment, preset stipple pattern be made up of multiple circular shaped lattice point, in a reference direction perpendicular to incidence surface, the diameter of circular shaped lattice point is increased to the direction of light guide plate relative to a surface of incidence surface by the incidence surface of light guide plate, and reference direction is taken up an official post, the site spacing of two adjacent circular shaped lattice points is all identical.The site spacing of the second site group in unit area is greater than the site spacing of the 4th site group in unit area, and the site diameter of this second site group in unit area is greater than the site diameter of the 4th site group in unit area.In second site group, the site spacing of wantonly two neighbour nodes is identical, and in the first site group, the site spacing of wantonly two neighbour nodes is identical.
In an embodiment, the gap of every two neighbour nodes of actual lattice point structure can be greater than 0.1mm.
In an embodiment, preset the region that the gap of every two neighbour nodes in stipple pattern is greater than a prepsetting gap and belong to first area, the region that the gap of every two neighbour nodes is less than this prepsetting gap belongs to second area, and this prepsetting gap can be 0.1mm.
Another embodiment of the present invention provides a kind of backlight module, comprises a light source and a light guide plate.Light guide plate comprises an incidence surface, a bottom surface and a lattice point structure.Incidence surface is arranged at adjacent light source position place, and bottom surface is connected to incidence surface and presss from both sides an angle with incidence surface, and bottom surface at least comprises a first area of contiguous incidence surface and the second area away from incidence surface, and first area and second area are not overlapping.Lattice point structure is arranged at the bottom surface of light guide plate and comprises default stipple pattern and an entity lattice point structure.Entity lattice point structure comprises the one first site group being distributed in first area and the one second site group being distributed in second area, default stipple pattern comprises one the 3rd site group being distributed in first area and one the 4th site group being distributed in second area, and the first site group is identical with the network point distribution of the 3rd site group.Second area can be drawn and be divided into multiple unit area, one area ratio of the site total area in unit area of one area ratio of the site total area of the second site group in unit area and unit area area and the 4th site group and unit area area is identical, the dot size of the second site group is greater than the dot size of the first site group, and the site spacing of the second site group is greater than the site spacing of the first site group.
According to the design of each embodiment above-mentioned, first stipple pattern is preset by design one, the region making light path different produces respective network point distribution density reference value, to meet optical design requirements and to provide preferably briliancy homogeneity, so when forming entity lattice point structure, can according to default stipple pattern zones of different network point distribution density reference value separately, increase dot size and site spacing under the network point distribution density prerequisite that maintenance is identical with default stipple pattern simultaneously, so when net-point printing, site can be avoided to link together and scumming situation can not be produced.
Other objects of the present invention and advantage can be further understood from the technical characteristic disclosed by the present invention.For above and other object of the present invention, feature and advantage can be become apparent, special embodiment below also coordinates institute's accompanying drawings, is described in detail below.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the backlight module of one embodiment of the invention.
Fig. 2 A and Fig. 2 B is the configuration schematic diagram being arranged at the lattice point structure of bottom surface of light guide plate according to the display of one embodiment of the invention.
Fig. 3 A shows the network point distribution kenel of the 4th site group presetting stipple pattern, the network point distribution kenel of the second site group of Fig. 3 B display entity lattice point structure.
Fig. 4 shows the configuration schematic diagram of the lattice point structure of a known light guide plate.
Embodiment
Aforementioned and other technology contents, feature and effect for the present invention, in the detailed description of following cooperation with reference to graphic embodiment, can clearly present.The direction term mentioned in following examples such as: upper and lower, left and right, front or rear etc., is only the direction with reference to annexed drawings.Therefore, the direction term of use is used to illustrate and is not used for limiting the present invention.
Fig. 1 is the schematic diagram of the backlight module of one embodiment of the invention.As shown in Figure 1, backlight module 1 comprises light guide plate 10 and a light source 16, and light guide plate 10 has an incidence surface 12 and is connected to incidence surface 12 and presss from both sides the bottom surface 14 of an angle with incidence surface, and the light source 16 of the contiguous such as light-emitting diode light bar of incidence surface 12.In the present embodiment, bottom surface 14 can comprise an a non-overlapping first area P and second area Q, first area P such as can be close to incidence surface 12 and second area Q away from incidence surface 12, and lattice point structure (not shown) can be arranged at the bottom surface 14 of light guide plate 10.
Fig. 2 A and Fig. 2 B is the configuration schematic diagram being arranged at the lattice point structure of bottom surface of light guide plate according to the display of one embodiment of the invention.In the present embodiment, lattice point structure comprises one shown in Fig. 2 A and presets stipple pattern and the entity lattice point structure shown in Fig. 2 B, entity lattice point structure (Fig. 2 B) comprises the one first site group 20a being distributed in first area P and the one second site group 20b being distributed in second area Q, presets stipple pattern (Fig. 2 A) and comprises one the 3rd site group 20c being distributed in first area P and one the 4th site group 20d being distributed in second area Q.First please refer to Fig. 2 A, preset in stipple pattern in one, the spacing (the distance values d1 ' of such as first area P and the distance values d2 ' of second area Q) of every two neighbour nodes is all identical, because decaying gradually along with optical path length increases luminous energy, therefore the dot size in the position of light path (namely comparatively away from incidence surface 12) comparatively far away can increase gradually to meet optical design requirements and provide preferably briliancy homogeneity, the clearance C of two neighbour nodes ' can towards little away from incidence surface direction convergent.Therefore, preset the clearance C of the first area P of stipple pattern and second area Q by every two neighbour nodes ' size divides, the region being greater than a prepsetting gap (such as 0.1mm) when the gap of every two neighbour node C ' belongs to first area P, and the region that the gap of every two neighbour nodes is less than this prepsetting gap (such as 0.1mm) belongs to second area Q.As shown in Figure 2 A, in an embodiment, the 3rd site group 20c and the 4th site group 20d that preset stipple pattern can be made up of multiple circular shaped lattice point T, and on a reference direction S perpendicular to incidence surface 12, the diameter of multiple circular shaped lattice point T is increased to the direction of light guide plate 10 relative to a surface 22 of incidence surface 12 by the incidence surface 12 of light guide plate 10, and on reference direction S, site spacing d1 ', the d2 ' (air line distances in two circular shaped lattice point T centers of circle) of any two adjacent circular sites T is all identical.
Refer again to Fig. 2 B, the entity lattice point structure of one embodiment of the invention comprises the one first site group 20a being distributed in first area P and the one second site group 20b being distributed in second area Q, the dot size of the second site group 20b is greater than the dot size of the first site group 20a, as shown in Figure 2 B, first site group 20a and the second site group 20b of entity lattice point structure also can be made up of multiple circular shaped lattice point T, the diameter of multiple circular shaped lattice point T is increased to the direction of light guide plate 10 relative to a surface 22 of incidence surface 12 by the incidence surface 12 of light guide plate 10 equally, and the site spacing d2 of the second site group 20b is greater than the site spacing d1 of the first site group 20a.In the present embodiment, be positioned at the 3rd site group 20c of the default stipple pattern of first area P equally identical with the network point distribution of the first site group 20a of entity lattice point structure, but it is different from the network point distribution of the second site group 20b of entity lattice point structure to be positioned at the 4th site group 20d of the default stipple pattern of second area Q equally, in the different network point distribution modes of second area Q both illustrating with Fig. 3 A and Fig. 3 B as follows.The second area Q of bottom surface of light guide plate 14 can draw and be divided into multiple unit area, Fig. 3 A shows the network point distribution kenel of the 4th site group 20d under unit area presetting stipple pattern, the network point distribution kenel of the second site group 20b under unit area of Fig. 3 B display entity lattice point structure.Comparison diagram 3A and Fig. 3 B is known, in the present embodiment, one area ratio of dot area in unit area M of one area ratio of the dot area in the second site group 20b unit area M and the unit area M total area and the 4th site group 20d and the unit area M total area is identical, that is second site group 20b with the 4th site group 20d, there is identical unit area distribution density, but the second site spacing d2 of site group 20b in unit area M is greater than the site spacing d2 ' of the 4th site group 20d, and the dot size of the second site group 20b is greater than the dot size of the 4th site group 20d in unit area M.According to the design of the embodiment of the present invention, for example, as site group 20b, 20d is circular shaped lattice point T when forming, the average circular shaped lattice point diameter (can be 1.1962mm) of the second site group 20b of entity lattice point structure is greater than the average circular shaped lattice point diameter (can be 1.1857mm) of the 4th site group 20d of default stipple pattern, the site spacing d2 (can be 1.3362mm) of the second site group 20b is greater than the site spacing d2 ' (can be 1.2557mm) of the 4th site group 20d, and the clearance C that in the second site group 20b, two neighbour nodes produce is 0.14mm (>0.1mm).Therefore, in the present embodiment, although be distributed in the second site group 20b size comparatively large (1.1962mm>1.1857mm) of second area Q, but obtain by increasing site spacing d2 (1.3362mm>1.2557mm) effect that clearance C is greater than 0.1mm, therefore can avoid producing scumming situation in second area Q maintaining under identical network point distribution density.
According to the design of each embodiment above-mentioned, first stipple pattern is preset by design one, region (the such as first area P making light path different, second area Q) produce respective network point distribution density reference value, to meet optical design requirements and to provide preferably briliancy homogeneity, so when forming entity lattice point structure, can according to default stipple pattern zones of different network point distribution density reference value separately, increase dot size and site spacing under the network point distribution density prerequisite that maintenance is identical with default stipple pattern simultaneously, so when net-point printing, site can be avoided to link together and scumming situation can not be produced.
The foregoing is only preferred embodiment of the present invention, can not limit scope of the invention process with this, all simple equivalences done according to the claims in the present invention and summary of the invention change and modify, and all still remain within the scope of the patent.Any embodiment of the present invention or claim must not reach whole object disclosed by the present invention or advantage or feature in addition.
Symbol description
1 backlight module
10 light guide plate
12 incidence surfaces
14 bottom surfaces
16 light sources
20a first site group
20b second site group
20c the 3rd site group
20d the 4th site group
22 surfaces
100 light guide plate
102 lattice point structures
102a first site group
102b second site group
104 bottom surfaces
106 incidence surfaces
108 light sources
C, C ' gap, site
D1, d2, d1 ', d2 ' site spacing
M unit area
P first area
Q second area
S reference direction
T circular shaped lattice point
Claims (14)
1. a light guide plate, comprises an incidence surface, a bottom surface and a lattice point structure,
This incidence surface is suitable for arranging at least one light source,
This bottom surface is connected to this incidence surface and presss from both sides an angle with this incidence surface, and this bottom surface at least comprises a contiguous first area of this incidence surface and the second area away from this incidence surface, and this first area is not overlapping with this second area,
This lattice point structure is arranged at this bottom surface of this light guide plate, this lattice point structure comprises one and presets stipple pattern and an entity lattice point structure, this entity lattice point structure comprises the one first site group being distributed in this first area and the one second site group being distributed in this second area, this default stipple pattern comprises one the 3rd site group being distributed in this first area and one the 4th site group being distributed in this second area, wherein, this the first site group is identical with the network point distribution of the 3rd site group, this second area is drawn and is divided into multiple unit area, one area ratio of dot area in this unit area of one area ratio of the dot area of this second site group in this unit area and this unit area total area and the 4th site group and this unit area total area is identical, the dot size of this second site group is greater than the dot size of this first site group, and the site spacing of this second site group is greater than the site spacing of this first site group.
2. light guide plate as claimed in claim 1, it is characterized in that, this default stipple pattern is made up of multiple circular shaped lattice point, in a reference direction perpendicular to this incidence surface, the diameter of these circular shaped lattice points is increased to the direction of this light guide plate relative to a surface of this incidence surface by this incidence surface of this light guide plate, and the take up an official post site spacing of adjacent two these circular shaped lattice points of this reference direction is all identical.
3. light guide plate as claimed in claim 2, it is characterized in that, the site spacing of this second site group in this unit area is greater than the site spacing of the 4th site group in this unit area, and the site diameter of this second site group in this unit area is greater than the site diameter of the 4th site group in this unit area.
4. light guide plate as claimed in claim 3, it is characterized in that, in this second site group, the site spacing of wantonly two neighbour nodes is identical, and in this first site group, the site spacing of wantonly two neighbour nodes is identical.
5. light guide plate as claimed in claim 1, it is characterized in that, the gap of every two neighbour nodes of this actual lattice point structure is greater than 0.1mm.
6. light guide plate as claimed in claim 1, it is characterized in that, in this default stipple pattern, the region that the gap of every two neighbour nodes is greater than a prepsetting gap belongs to this first area, and the region that the gap of every two neighbour nodes is less than this prepsetting gap belongs to this second area.
7. light guide plate as claimed in claim 6, it is characterized in that, this prepsetting gap is 0.1mm.
8. a backlight module, comprises a light source and a light guide plate,
This light guide plate comprises an incidence surface, a bottom surface and a lattice point structure,
This incidence surface is arranged at this light source position place contiguous,
This bottom surface is connected to this incidence surface and presss from both sides an angle with incidence surface, and this bottom surface comprises a contiguous first area of this incidence surface and the second area away from this incidence surface, and this first area is not overlapping with this second area,
This lattice point structure is arranged at this bottom surface of this light guide plate, this lattice point structure comprises one and presets stipple pattern and an entity lattice point structure, this entity lattice point structure comprises the one first site group being distributed in this first area and the one second site group being distributed in this second area, this default stipple pattern comprises one the 3rd site group being distributed in this first area and one the 4th site group being distributed in this second area, wherein, this the first site group is identical with the network point distribution of the 3rd site group, this second area can be drawn and be divided into multiple unit area, one area ratio of dot area in this unit area of one area ratio of the dot area of this second site group in this unit area and this unit area total area and the 4th site group and this unit area total area is identical, the dot size of this second site group is greater than the dot size of this first site group, and the site spacing of this second site group is greater than the site spacing of this first site group.
9. backlight module as claimed in claim 8, it is characterized in that, this default stipple pattern is made up of multiple circular shaped lattice point, in a reference direction perpendicular to this incidence surface, the diameter of these circular shaped lattice points is increased to the direction of this light guide plate relative to a surface of this incidence surface by this incidence surface of this light guide plate, and the take up an official post site spacing of adjacent two these circular shaped lattice points of this reference direction is all identical.
10. backlight module as claimed in claim 9, it is characterized in that, the site spacing of this second site group in this unit area is greater than the site spacing of the 4th site group in this unit area, and the site diameter of this second site group in this unit area is greater than the site diameter of the 4th site group in this unit area.
11. backlight modules as claimed in claim 10, it is characterized in that, in this second site group, the site spacing of wantonly two neighbour nodes is identical, and in this first site group, the site spacing of wantonly two neighbour nodes is identical.
12. backlight modules as claimed in claim 8, is characterized in that, the gap of every two neighbour nodes of this actual lattice point structure is greater than 0.1mm.
13. backlight modules as claimed in claim 8, it is characterized in that, in this default stipple pattern, the region that the gap of every two neighbour nodes is greater than a prepsetting gap is drawn and is divided into this first area, and the region that the gap of every two neighbour nodes is less than this prepsetting gap is drawn and is divided into this second area.
14. backlight modules as claimed in claim 13, it is characterized in that, this prepsetting gap is 0.1mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410067489.4A CN104880756B (en) | 2014-02-27 | 2014-02-27 | Light guide plate and backlight module |
| TW103122597A TWI522665B (en) | 2014-02-27 | 2014-07-01 | Light guide plate and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410067489.4A CN104880756B (en) | 2014-02-27 | 2014-02-27 | Light guide plate and backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104880756A true CN104880756A (en) | 2015-09-02 |
| CN104880756B CN104880756B (en) | 2018-04-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410067489.4A Active CN104880756B (en) | 2014-02-27 | 2014-02-27 | Light guide plate and backlight module |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104880756B (en) |
| TW (1) | TWI522665B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107132609A (en) * | 2017-06-16 | 2017-09-05 | 苏州亿光源光电科技有限公司 | local dimming light guide plate |
| CN112799167A (en) * | 2019-11-13 | 2021-05-14 | 尹兑重 | Mould pattern processingequipment is used in light guide plate production |
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| US20120275184A1 (en) * | 2008-04-18 | 2012-11-01 | Pixtronix, Inc. | Light guides and backlight systems incorporating prismatic structures and light redirectors |
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2014
- 2014-02-27 CN CN201410067489.4A patent/CN104880756B/en active Active
- 2014-07-01 TW TW103122597A patent/TWI522665B/en not_active IP Right Cessation
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| WO2004031647A1 (en) * | 2002-09-30 | 2004-04-15 | Sharp Kabushiki Kaisha | Backlight unit and liquid crystal display unit using backlight unit |
| US20040095743A1 (en) * | 2002-11-20 | 2004-05-20 | Tai-Cheng Yu | Light guide plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132609A (en) * | 2017-06-16 | 2017-09-05 | 苏州亿光源光电科技有限公司 | local dimming light guide plate |
| CN112799167A (en) * | 2019-11-13 | 2021-05-14 | 尹兑重 | Mould pattern processingequipment is used in light guide plate production |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201533481A (en) | 2015-09-01 |
| TWI522665B (en) | 2016-02-21 |
| CN104880756B (en) | 2018-04-27 |
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