CN100489443C - Light conducting plate mesh points measuring method - Google Patents
Light conducting plate mesh points measuring method Download PDFInfo
- Publication number
- CN100489443C CN100489443C CNB031138519A CN03113851A CN100489443C CN 100489443 C CN100489443 C CN 100489443C CN B031138519 A CNB031138519 A CN B031138519A CN 03113851 A CN03113851 A CN 03113851A CN 100489443 C CN100489443 C CN 100489443C
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- CN
- China
- Prior art keywords
- light guide
- guide plate
- site
- measuring method
- area
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Abstract
The invention is a method to measure net dots of light guide board, used to calculate the distribution of area density of the light guide board, including the steps: build a reference frame to determine the coordinates of the net dots; select a unit area; calculate the areas of the net dots in each unit area; calculate the area density of the net dots. Where, when select the unit area, the number of net dots in each unit area is equal and each net dot is in the unit area in the same proportion. It can simply and conveniently and accurately achieve the distribution of area density of the light guide board, further beneficial to evaluate the light guiding property of the light board.
Description
[technical field]
The present invention relates to a kind of light guide plate mesh point measuring method, refer to a kind of method of measuring the light guide plate mesh point area density especially.
[background technology]
Because advantages such as the liquid crystal display utensil is light, thin, power consumption is little are widely used in modernized information equipments such as notebook, mobile phone, personal digital assistant.Do not have a characteristics of luminescence because of liquid crystal itself, being required to be it provides backlight module to realize Presentation Function.
The prior art backlight module comprises light source and light guide plate, the incidence surface setting of the relative light guide plate of light source, and the transmission direction that this light-guide plate guides is sent light beam from light source converts line source or pointolite to the area source outgoing.A plurality of sites that distribute, the bottom surface of this light guide plate in order to the total reflection condition of broken beam in the light guide plate internal transmission, and make its scattering improving the homogeneity of light guide plate outgoing beam, and then promote the overall performance of backlight module.The density of this site, size all can have different designs to adapt to different backlight modules.
Usually, the design that light guide plate mesh point distributes is to divide line and alignment on the light guide plate surface, and wherein the vertical alignment of line is the center arrangement site with the ranks intersection point again.As everyone knows, the area density of light guide plate mesh point is the important factor in order of the average bright dipping briliancy of light guide plate exiting surface, therefore, is the optical property that of assessment light guide plate, and the measurements and calculations of the area density of site are seemed very necessary.Except that the average area density of measuring whole light guide plate mesh point, when doing in fact, also need to consider the distribution of the area density of site, because the distribution of dot area density has more directly influence to the optical property of light guide plate.
The method that prior art is calculated the light guide plate mesh point area density is the some unit areas of definition, calculates the area of constituent parts area, measures all site area occupied ratios in the constituent parts area, draws the area density distribution situation of light guide plate mesh point then.Yet what unit area is the prior art must judge each network point distribution in, need judge also how many areas this site has be positioned at this unit area, and it calculates very very complicated, expends more time and human cost, very is inconvenience.
[summary of the invention]
For overcoming the defective of prior art light guide plate mesh point measuring method very complicated, the invention provides a kind of light guide plate mesh point measuring method, it can convenient calculating dot area Density Distribution, thereby helps assessing the optical property that of light guide plate, and light guide plate is arranged in the corresponding backlight module.
The technical scheme of technical solution problem of the present invention is: a kind of light guide plate mesh point measuring method is provided, and it comprises step: set up coordinate system, determine the site coordinate; Choose unit area; Calculate the dot area in the constituent parts area; Calculate dot area density; According to measured dot area density, assess the optical property that of light guide plate, this light guide plate is arranged in the corresponding backlight module.Wherein, when choosing unit area, the number of site equates in the constituent parts area, and each site is positioned at unit area with identical ratio.
Compare prior art, the invention has the beneficial effects as follows: because light guide plate mesh point measuring method of the present invention is when choosing unit area, the number of site in the constituent parts area is equated, and each site is positioned at unit area with identical ratio, thereby need not differentiate each network point distribution in what unit area, need not judge more how many areas this site has be positioned at this unit area, make that the calculating of dot area is very convenient, can draw the area density distribution situation of light guide plate mesh point fast, thereby help assessing the optical property that of light guide plate, and this light guide plate is arranged in the corresponding backlight module.
[description of drawings]
Fig. 1 is the process flow diagram of light guide plate mesh point measuring method of the present invention.
Fig. 2 is the light guide plate stereographic map of site of the present invention measuring method first embodiment.
Fig. 3 is the site of the present invention measuring method first embodiment synoptic diagram.
Fig. 4 is the site of the present invention measuring method second embodiment synoptic diagram.
[embodiment]
Seeing also Fig. 1, is the process flow diagram of light guide plate mesh point measuring method of the present invention.This measuring method comprises step: set up coordinate system, determine the site coordinate; Choose unit area; Calculate the dot area in the constituent parts area; Calculate dot area density; According to measured dot area density, assess the optical property that of light guide plate, this light guide plate is arranged in the corresponding backlight module.
Seeing also Fig. 2, is light guide plate stereographic map in the first embodiment of the invention.This light guide plate 10 comprises an incidence surface 11, an exiting surface 12 that links to each other with incidence surface 11 and one and exiting surface 12 opposed bottom surface 13.Wherein, this incidence surface 11 is in order to receiving the light from external point light source or line source (figure does not show), and this exiting surface 12 is in order to the guiding beam projecting, thereby pointolite or line source are converted to area source.This bottom surface 13 prevents the light effusion in order to reflection projection light thereon, improves the utilization factor of light beam.For destroying light in the total reflection condition of light guide plate 10 inside, and make that it fully reflects, scattering is with the whole optical property of further raising, 13 are provided with site 14 in modes such as print process or ejection formations in the bottom surface.
See also Fig. 3, these a plurality of sites 14 are circular shaped lattice point, are equally distributed in bottom surface 13 with determinant, and wherein, line space is d, and column pitch is c.And a plurality of sites 14 also spaced apart, intersection point place of 1/2 line space and 1/2 column pitch.The measuring method that the area density of this light guide plate mesh point 14 distributes comprises step:
(1) site coordinate conversion;
(2) definition site radius;
(3) choose unit area;
(4) dot area in the unit of account area;
(5) calculate the interior dot area Density Distribution of unit area;
(6) according to measured dot area density, assess the optical property that of light guide plate,
This light guide plate is arranged in the corresponding backlight module.
Facing light guide plate 10, is initial point with the site 14 in arbitrary corner, is that unit sets up rectangular coordinate system with 1/2 of line space d and column pitch c respectively, determine each site 14 coordinate (n, m).
The definition coordinate is that (n, the radius of site 14 m) is r
(n, m)
Choose unit area 142, its area is 1/4th of single pixel 141 areas.That is: S
(n, m)=cd/4, wherein (n m) is the coordinate of the corner point of this unit area 142.
Obviously, the dot area in the unit area 142 can calculate very easily by formula, and its formula is:
A
(n，m)＝0.25π[r
2 (n，m)+r
2 (n+1，m)+r
2 (n，m+1)+r
2 (n+1，m+1)]。
Calculate area density distribution σ=π [r of this light guide plate mesh point 14
2 (n, m)+ r
2 (n+1, m)+ r
2 (n, m+1)+ r
2 (n+1, m+1)]/cd.
At last,, assess the optical property that of light guide plate, this light guide plate is arranged in the corresponding backlight module according to measured dot area density.
Because light guide plate mesh point measuring method of the present invention is when choosing unit area 142, the number of site 14 in the constituent parts area 142 is equated, and each site 14 is positioned at unit area 142 with identical ratio 1/4, thereby need not differentiate each site 14 and be distributed in what unit area 142, need not judge more how many areas this site 14 has be positioned at this unit area 142, make that the calculating of dot area is very convenient, can draw the area density distribution situation of light guide plate mesh point fast, thereby can assess the optical property that of light guide plate in view of the above, and this light guide plate is arranged in the corresponding backlight module.
Seeing also Fig. 4, is the signal of light guide plate mesh point measuring method second embodiment of the present invention.These a plurality of sites 24 are square sites, and with the determinant regular distribution, wherein, line space is b, and column pitch is a.The measuring method that the area density of this light guide plate mesh point 24 distributes comprises step:
(1) site coordinate conversion is an initial point with the site 24 in arbitrary corner, is that unit sets up rectangular coordinate system with line space a and column pitch b respectively, determine each site 24 coordinate (n, m);
(2) the definition coordinate be (n, site 24 length of sides m) be 1 (n, m);
(3) choose unit area 241, its area is single elemental area.That is: S
(n, m)=ab, wherein (n m) is the coordinate of the corner point of this unit area 241;
(4) dot area in the unit of account area,
A
(n，m)＝0.25[1
2 (n，m)+1
2 (n+1，m)+1
2 (n，m+1)+1
2 (n+1，m+1)]；
(5) calculate the interior dot area Density Distribution of unit area
σ＝0.25[1
2 (n，m)+1
2 (n+1，m)+1
2 (n，m+1)+1
2 (n+1，m+1)]/ab；
(6) according to measured dot area density, assess the optical property that of light guide plate, this light guide plate is arranged in the corresponding backlight module.
Certainly, light guide plate mesh point measuring method of the present invention is not limited to above-mentioned embodiment.As: this site also can be arbitrary shapes such as rectangle, ellipse.The distribution of site also can be other equidistant determinant and distributes.
Claims (6)
1. light guide plate mesh point measuring method, this site is uniformly distributed on the light guide plate, the projection of site on light guide plate be shaped as circle, square, ellipse or rectangle, the method comprising the steps of:
Set up coordinate system, determine the site coordinate;
Choose unit area, the number of site equates in the constituent parts area, and each site is positioned at unit area with identical ratio;
Calculate the dot area in the constituent parts area;
Calculate dot area density;
Dot area density according to measured is arranged at this light guide plate in the corresponding backlight module.
2. light guide plate mesh point measuring method as claimed in claim 1 is characterized in that this site is for equidistantly distributing.
3. light guide plate mesh point measuring method as claimed in claim 2 is characterized in that this site is the determinant regular distribution.
4. light guide plate mesh point measuring method as claimed in claim 1 is characterized in that this site is that equidistant determinant distributes.
5. light guide plate mesh point measuring method as claimed in claim 4 is characterized in that this circular shaped lattice point area density distribution formula is
σ=π [r
2 (n, m)+ r
2 (n+1, m)+ r
2 (n, m+1)+ r
2 (n+1, m+1)(n m) is site coordinate, r to]/cd
(n, m)For site radius, c and d are respectively line space and column pitch.
6. light guide plate mesh point measuring method as claimed in claim 4 is characterized in that this square dot area Density Distribution formula is
σ=0.25[l
2 (n, m)+ l
2 (n+1, m)+ l
2 (n, m+1)+ l
2 (n+1, m+1)(n m) is site coordinate, l to]/ab
(n, m)For the site length of side, a and b are respectively line space and column pitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031138519A CN100489443C (en) | 2003-03-01 | 2003-03-01 | Light conducting plate mesh points measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031138519A CN100489443C (en) | 2003-03-01 | 2003-03-01 | Light conducting plate mesh points measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1525138A CN1525138A (en) | 2004-09-01 |
| CN100489443C true CN100489443C (en) | 2009-05-20 |
Family
ID=34283826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031138519A Expired - Fee Related CN100489443C (en) | 2003-03-01 | 2003-03-01 | Light conducting plate mesh points measuring method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878958B (en) * | 2012-09-28 | 2015-09-02 | 杭州电子科技大学 | A kind of measuring method of lithographic forme dot area |
| CN112666162B (en) * | 2020-12-17 | 2023-03-10 | 苏州天禄光科技股份有限公司 | Light guide plate mesh point density detection equipment and detection method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6023316A (en) * | 1994-08-12 | 2000-02-08 | Sony Corporation | Back lighted liquid crystal display and method of manufacture thereof |
| CN2463856Y (en) * | 2001-02-08 | 2001-12-05 | 胜华科技股份有限公司 | Light conductor structure only using two-side light source |
| CN1327166A (en) * | 2000-06-07 | 2001-12-19 | 三星电子株式会社 | Lighting method, back light device in liquid crystal display and liquid crystal display |
| CN1349082A (en) * | 2001-12-04 | 2002-05-15 | 上海交通大学 | Fast mold figure measuring method |
| US6452649B1 (en) * | 1999-07-16 | 2002-09-17 | International Business Machines Corporation | Flat surface illumination device, liquid crystal display panel and liquid crystal display device |
-
2003
- 2003-03-01 CN CNB031138519A patent/CN100489443C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6023316A (en) * | 1994-08-12 | 2000-02-08 | Sony Corporation | Back lighted liquid crystal display and method of manufacture thereof |
| US6452649B1 (en) * | 1999-07-16 | 2002-09-17 | International Business Machines Corporation | Flat surface illumination device, liquid crystal display panel and liquid crystal display device |
| CN1327166A (en) * | 2000-06-07 | 2001-12-19 | 三星电子株式会社 | Lighting method, back light device in liquid crystal display and liquid crystal display |
| CN2463856Y (en) * | 2001-02-08 | 2001-12-05 | 胜华科技股份有限公司 | Light conductor structure only using two-side light source |
| CN1349082A (en) * | 2001-12-04 | 2002-05-15 | 上海交通大学 | Fast mold figure measuring method |
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| Publication number | Publication date |
|---|---|
| CN1525138A (en) | 2004-09-01 |
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Granted publication date: 20090520 Termination date: 20160301 |
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