CN107436511A - A kind of optical design method for lifting directly-down liquid crystal module brightness homogeneity - Google Patents
A kind of optical design method for lifting directly-down liquid crystal module brightness homogeneity Download PDFInfo
- Publication number
- CN107436511A CN107436511A CN201710876417.8A CN201710876417A CN107436511A CN 107436511 A CN107436511 A CN 107436511A CN 201710876417 A CN201710876417 A CN 201710876417A CN 107436511 A CN107436511 A CN 107436511A
- Authority
- CN
- China
- Prior art keywords
- reflecting paper
- liquid crystal
- crystal module
- design method
- homogeneity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
The invention discloses a kind of optical design method for lifting directly-down liquid crystal module brightness homogeneity, including：To in addition to LED lamp source and its lens position of opening, being printed in the reflecting paper of backlight central area using perforate and extinction ink, aperture or extinction ink printing points are formed in reflecting paper.The present invention is reduced area light reflection in a manner of uniform, smooth, that is, reduces central area backlight illumination by doing special punching or printed design to the reflecting paper of backlight central area；On the premise of not influenceing subjective effect and ensureing that other optical index such as brightness and efficiency are up to standard, backlight illumination homogeneity is effectively improved.
Description
Technical field
The present invention relates to the reflecting paper design method in down straight aphototropism mode set in LCD TV, this reflecting paper is applied to straight
Down liquid crystal module.
Background technology
As television distribution channel diversities develop, country's raising flat panel TV efficiency subsidy threshold, high energy efficiency machine (including
Efficiency ' leader ' product), Sanyo's machine and miscellaneous engineering machine it is in great demand；But the brightness homogeneity of these products will
Seek generally higher than household machine, it is impossible to directly continue to use household machine state of the art, it is necessary to carry out secondary development to volume production TV.
Although engineering machine profit is high, demand is universal smaller, typically will not new mold.If using traditional design
Scheme, brightness homogeneity is improved by changing lamp number or lamp source layout, be bound to bring power supply change, backboard repairs a die and lamp
The problems such as bar is assert again, while cost is significantly increased, the construction cycle is very long, and progress can not meet engineering machine order demand.
The content of the invention
The defects of it is an object of the invention to overcome prior art, there is provided cost is small for a kind of change, the construction cycle short carries
Rise the optical design method of directly-down liquid crystal module brightness homogeneity.
What the present invention was realized in：
A kind of optical design method for lifting directly-down liquid crystal module brightness homogeneity, including：
To in the reflecting paper of backlight central area in addition to LED lamp source and its lens position of opening, using perforate and suction
Gloss oil ink print, aperture or extinction ink printing points are formed in reflecting paper.
Further scheme is：
A diameter of 3mm of each aperture or extinction ink printing points, between aperture or extinction ink printing points between
Away from for 30mm.
The present invention to the reflecting paper of backlight central area by doing special punching or printed design, with uniform, smooth
Mode reduces area light reflection, that is, reduces central area backlight illumination；Do not influenceing subjective effect and ensureing that other optics refer to
On the premise of mark such as brightness and efficiency is up to standard, backlight illumination homogeneity is effectively improved.
Brief description of the drawings
Fig. 1：LCD TV screen brightness homogeneity test position figure；
Fig. 2：Reflecting paper assembling stereogram.
Fig. 3：Reflecting paper assembles partial enlarged drawing.
Fig. 4：Reflecting paper front view.
Fig. 5：Optical principle schematic diagram.
Embodiment
The present invention is further illustrated with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, it is shown that LCD TV screen brightness homogeneity test position figure, under pure white field signal, survey
P1, P2, P3, P4, P5, P6, P7, P8 point brightness are tried, chooses wherein brightness minimum point (such as P8 is the minimum Lp8 of brightness), it is bright
Degree homogeneity is Lp8/Lp0 × 100%.
As shown in accompanying drawing 2,3,4, it is shown that reflecting paper rigging position and the structural representation of reflecting paper.
In figure, on backboard 1, lamp bar is mounted with, wherein lamp bar is by lamp bar pcb board 21 and on lamp bar pcb board 21
LED lamp source and its lens 22 collectively constitute, on backboard 1 and lamp bar, be provided with reflecting paper 3.
In reflecting paper 3, except LED lamp source and and its lens position of opening 31 in addition to elsewhere, using perforate and
Extinction ink is printed, and aperture or extinction ink printing points 32 are formed in reflecting paper.
As shown in Figure 5, when light is irradiated to region A, because the position is the aperture or extinction ink in reflecting paper
Printing points, light reflection can not be carried out in the region, finally be formed in video screen (region A along screen method line projection region A') bright
The tiny dim spot of dark gradual change；Under the collective effect of a large amount of dim spots in screen center region, center brightness (P0 points) slightly reduces, and reaches
To the purpose for improving TV brightness homogeneity.
As one embodiment of the present of invention, wherein each aperture or a diameter of 3mm of extinction ink printing points, aperture or
Spacing between extinction ink printing points is 30mm.
It should be noted that：The setting of the size, quantity and spacing of each aperture or extinction ink printing points and picture effect
Fruit, mixed light are relevant, it is necessary to be determined according to actual test situation away from, reflecting paper working ability and homogeneity lifting amplitude requirement.
In general, perforate (or printing) is smaller, and hole number is more, and lifting effect is better, but cost increase is also more, difficulty of processing
Become big.
Although reference be made herein to invention has been described for explanatory embodiment of the invention, and above-described embodiment is only this hair
Bright preferable embodiment, embodiments of the present invention are simultaneously not restricted to the described embodiments, it should be appreciated that people in the art
Member can be designed that a lot of other modifications and embodiment, and these modifications and embodiment will fall in principle disclosed in the present application
Within scope and spirit.
Claims (2)
- A kind of 1. optical design method for lifting directly-down liquid crystal module brightness homogeneity, it is characterised in that including：To in the reflecting paper of backlight central area in addition to LED lamp source and its lens position of opening, using perforate and extinction oil Ink print, aperture or extinction ink printing points are formed in reflecting paper.
- 2. the optical design method of directly-down liquid crystal module brightness homogeneity is lifted according to claim 1, it is characterised in that：A diameter of 3mm of aperture or extinction the ink printing points, the spacing between aperture or extinction ink printing points are 30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710876417.8A CN107436511A (en) | 2017-09-25 | 2017-09-25 | A kind of optical design method for lifting directly-down liquid crystal module brightness homogeneity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710876417.8A CN107436511A (en) | 2017-09-25 | 2017-09-25 | A kind of optical design method for lifting directly-down liquid crystal module brightness homogeneity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107436511A true CN107436511A (en) | 2017-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710876417.8A Pending CN107436511A (en) | 2017-09-25 | 2017-09-25 | A kind of optical design method for lifting directly-down liquid crystal module brightness homogeneity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107436511A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188781A (en) * | 2018-11-23 | 2019-01-11 | 厦门天马微电子有限公司 | Backlight module and display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102654276A (en) * | 2012-01-04 | 2012-09-05 | 京东方科技集团股份有限公司 | Reflector plate and straight down type backlight module applying same |
| CN205678514U (en) * | 2016-06-08 | 2016-11-09 | 广州市拓宝电子科技有限公司 | A kind of slimming straight-down negative TV shows structure |
-
2017
- 2017-09-25 CN CN201710876417.8A patent/CN107436511A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102654276A (en) * | 2012-01-04 | 2012-09-05 | 京东方科技集团股份有限公司 | Reflector plate and straight down type backlight module applying same |
| CN205678514U (en) * | 2016-06-08 | 2016-11-09 | 广州市拓宝电子科技有限公司 | A kind of slimming straight-down negative TV shows structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188781A (en) * | 2018-11-23 | 2019-01-11 | 厦门天马微电子有限公司 | Backlight module and display device |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171205 |