CN110989067A - Low-cost high-reliability optical combination structure - Google Patents
Low-cost high-reliability optical combination structure Download PDFInfo
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- CN110989067A CN110989067A CN201910744626.6A CN201910744626A CN110989067A CN 110989067 A CN110989067 A CN 110989067A CN 201910744626 A CN201910744626 A CN 201910744626A CN 110989067 A CN110989067 A CN 110989067A
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- light guide
- guide plate
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—Reflecting element, sheet or layer
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- 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
- G02F1/133553—Reflecting elements
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
An optical combination structure with low cost and high reliability sequentially comprises a support frame, an optical film material, a light guide plate, a reflecting sheet and a metal substrate from top to bottom, wherein the full fixation of the light guide plate in the X, Y direction is realized through the design of a gap between a light guide plate ear and a limiting groove on the metal substrate, and the control of the Z-direction displacement and the pressure of the light guide plate is realized through the design of a space between the light guide plate ear and a support frame boss corresponding to the light guide plate ear in the Z direction; spacing of the optical film in the X, Y direction is achieved through the design of gaps between the optical film ears and the barrier strips at corresponding positions on the metal substrate, and Z-direction displacement control of the optical film material is achieved through the space design of the optical film ears and the corresponding support frame grooves in the Z direction. The invention has excellent environmental reliability, and can reduce the weight of the product, reduce the production cost and improve the production efficiency.
Description
Technical Field
The invention relates to a liquid crystal display technology, in particular to an optical film assembly technology, and specifically relates to a low-cost high-reliability optical combined structure.
Background
The optical film assembly is an important component of the liquid crystal display module, and thus the environmental reliability of the optical film assembly becomes one of the important factors that restrict the service life of the liquid crystal display module. Especially in harsh working environments: such as temperature shock in a wide temperature range of-45 ℃ to 80 ℃, harsh low-pressure, damp-heat, salt spray and mold environments, and vibration environments with 7 times of gravity acceleration or more.
The traditional optical film assembly has high manufacturing cost, heavy product weight and poor environmental reliability, because the traditional optical film assembly structure comprises an upper layer of glass, a lower layer of glass and an optical film positioned between the two layers of glass, the four side walls of the glass adopt sealant to form a sealed cavity by the two layers of glass, and the optical film is accommodated in the sealed cavity. Therefore, the conventional optical film assembly is very easy to have high-temperature film wrinkle faults because the optical film base material has a large thermal expansion coefficient and can not freely stretch and retract in the sealed cavity; in addition, different optical films generate relative displacement in the X, Y direction under strong vibration magnitude, which is very easy to cause bright lines of the optical films and abrasion faults of the optical films. In addition, the fully-sealed optical module can bring about potential working hazards in a low-pressure environment, air in the optical combination is continuously amplified along with the continuous reduction of the environmental air pressure, and Newton's ring faults and even glass cracking and other irrecoverable faults are easily caused.
Chinese patent application No. 201410467975.5 discloses an optical film assembly with strong vibration resistance and a method for manufacturing the same. The subassembly includes support glass, brightness enhancement film and diffuser film, its characterized in that: the brightness enhancement film is arranged on the non-antireflection surface of the support glass, the diffusion film is arranged on the antireflection surface of the support glass, and the optical double-sided adhesive tapes are arranged between the support glass and the brightness enhancement film and between the support glass and the diffusion film. The invention has the following advantages: can not appear the demand of membrane wrinkle trouble under the high temperature in order to satisfy, can improve the fault frequency of vibration in-process blooming fish tail again greatly, simultaneously owing to used less one and consolidated glass, the thickness and the quality of membrane group descend, and the product is more frivolous. However, the summary of the patent specification states that: the optical film assembly is directly encapsulated in a structural member in a sealant encapsulation mode, which means that the optical film assembly has a structure comprising a sealant, a brightness enhancement film, a double-sided adhesive, supporting glass, a double-sided adhesive, a diffusion film and a sealant from top to bottom, and the transmittance of the sealant and the transmittance of the double-sided adhesive are both not 100%, so that the light-emitting efficiency of the optical film assembly prepared by the method is necessarily reduced to a certain extent compared with that of the traditional optical film assembly; in addition, the full-fit mode brings great inconvenience to the maintenance of the product, and violates the maintainability principle of the product design.
Chinese patent application No. 201320792913.2 discloses a reinforced optical film assembly. The functional optical diaphragm is clamped between the ITO glass and the functional glass, electrodes are arranged on two long edges of the ITO glass respectively, a flexible belt is arranged on the other short edge of the ITO glass, and the peripheries of the ITO glass, the functional optical diaphragm and the functional glass are sealed. The invention has the advantages that the heater assembly is used for replacing functional glass close to the liquid crystal screen in the optical film assembly, compared with the traditional method, the weight is reduced, the space is saved, and the system structure is simplified. However, on the one hand, the functional glass is still used in the manufacturing process of the optical combination, and the purposes of weight reduction and cost saving are not achieved to the maximum extent, and on the other hand, the ITO glass and the functional glass clamping optical film have the same structure as the traditional functional glass and the functional glass clamping optical film, and all the traditional optical combinations still have the problems of environmental reliability such as optical film wrinkling, abrasion and the like. In addition, the above patents all use functional glass in the manufacturing process of the optical assembly, which is expensive in manufacturing cost and heavy in weight, and need to reduce the occurrence rate of the film wrinkle failure of the optical film group by sacrificing some performance of the optical film group, which is not the best solution, so that it is a research hotspot to find a low-cost, light-weight and high-reliability optical film assembly that is resistant to both the high and low temperature film wrinkle and the vibration wear and is convenient to maintain.
Disclosure of Invention
The invention aims to design an optical combination structure with low cost and high reliability aiming at the problems of complex structure, heavy weight, poor impact resistance and corrugation capability and inconvenient manufacture of the existing liquid crystal display. The method has the characteristics of high production efficiency and strong maintainability, can ensure the reliability of the optical membrane component when the liquid crystal display module is in service under the environments of temperature cycle high-low temperature work, vibration, impact, acceleration, low air pressure and the like, and can be widely applied to the fields of electronic appliances and the like.
The technical scheme of the invention is as follows:
an optical combination structure with low cost and high reliability is characterized in that the optical combination structure sequentially comprises a support frame, an optical film material, a light guide plate, a reflecting sheet and a metal substrate from top to bottom, wherein the full fixation of the light guide plate in the X, Y direction is realized through the design of gaps between lugs of the light guide plate and limiting grooves on the metal substrate, and the Z-direction displacement and pressure control of the light guide plate are realized through the space design of the lugs of the light guide plate and corresponding support frame bosses thereof in the Z direction; spacing of the optical film in the X, Y direction is achieved through the design of gaps between the optical film ears and the barrier strips at corresponding positions on the metal substrate, and Z-direction displacement control of the optical film material is achieved through the space design of the optical film ears and the corresponding support frame grooves in the Z direction.
The light guide plate lugThe flower sets up on the non-edge of admitting light of light guide plate, and its mode of arrangement is: the length of the light guide plate ear is 1/2 multiplied by (15-20%) × the side length L0The number of the light guide plate is 2, the width of the ears of the light guide plate is 2-3 mm, and the distance between the ears is 30-65 mm.
The length of the long edge of the light guide plate ear limiting groove on the metal substrate is = the length of the long edge of the light guide plate ear +0.2mm, the length of the short edge of the limiting groove is 3-4 mm, and the gap between each limiting groove and the light guide plate ear in the width direction is 1 mm; the Z-direction gap between the support frame boss and the light guide plate ear is 0.15-0.3 mm, an insulating tape is attached to the gap or closed-cell silica gel foam with a PET substrate on the surface, and the resilience of the foam is more than or equal to 75%.
The optical film ears are positioned above the light guide plate ears, the length of the optical film ears is 1/2, the width of the optical film ears is consistent with the width of the light guide plate ears, the number of the optical film ears on each side is equal to that of the light guide plate ears, and the distance between the optical film ears is consistent with that of the light guide plate ears; the Z-direction gap between the ear of the optical film and the groove of the support frame is 0.2mm, silica gel foam or an insulating tape with the thickness of 0.15mm is pasted in the groove, and the dynamic friction coefficient mu between the surface of the foam or the tape and the optical film is less than or equal to 0.48.
The arrangement mode of the upper barrier strip of the metal substrate is as follows: the blend stop is located between two ears of the optical film on the long/short side of the metal substrate, the gap between the blend stop and the edge of the ear of the optical film is 0-0.2 mm, the length of the blend stop is 10mm +/-1 mm, the width of the blend stop is 1.2mm, the height of the blend stop is 0.4-0.7 mm, the blend stop is in clearance fit with the groove at the corresponding position on the support frame, and the clearance is 0.2-0.4 mm.
The reflector plate is attached to the bottom surface and the periphery of the light guide plate in a laser dotting, folding and local bonding mode.
The invention has the beneficial effects that:
Drawings
FIG. 1 is a top view of the structure of the present invention and a cross-sectional view taken along the line A-A,
fig. 2 shows a partial enlarged view of the fit relationship between the light guide plate and the metal substrate.
Fig. 3 shows the matching relationship of the optical film material with the metal substrate and the light guide plate and a partial enlarged view thereof.
In the figure: 10 is an optical film material, 20 is a support frame, 30 is a light guide plate, 40 is a metal substrate, 21 is a first ear of the light guide plate, 22 is a limit groove on the metal substrate, 31 is a second ear of the light guide plate, 32 is an optical film ear, and 33 is an optical film barrier strip on the metal substrate.
Detailed Description
The invention is further described below with reference to the figures and examples.
Example 1
As shown in fig. 1-3.
A low-cost high-reliability optical assembly and structure thereof: the reflective film comprises a support frame 20, an optical film 10, a light guide plate 30, a reflective sheet and a metal substrate 40 in sequence from top to bottom, as shown in fig. 1, the reflective sheet is attached to the bottom and the periphery of the light guide plate 30 by laser dotting, folding and local bonding (not shown in the figure). Wherein: the light guide plate first ears 21 and the spacing grooves 22 on the metal substrate are in clearance fit to realize the full fixation of the light guide plate in the direction X, Y (fig. 2), and the light guide plate second ears 31 and the corresponding frame bosses are in space fit in the direction Z to realize the control of the Z-direction displacement and pressure of the light guide plate, as shown in fig. 3; the spacing of the optical film 10 in the X, Y direction is realized by the clearance fit between the optical film ear 32 and the barrier strip 33 at the corresponding position on the metal substrate 40, and the Z-direction displacement control of the optical film 10 is further realized by the spatial fit of the optical film ear 32 and the corresponding support frame groove in the Z direction, as shown in fig. 1.
The size of the light guide plate 30 is 299mm multiplied by 172mm, light enters from a single long side, the ears 21 are arranged on the non-light-entering side of the light guide plate 30, the length of the ears on the short side of the light guide plate is 17mm, the number of each side is 2, and the distance between the ears is 30 mm; the length of the ears on the long side of the light guide plate 30 is 30mm, the number of each side is 2, the distance between the ears is 50mm, and the width of the ears of the light guide plate is 3 mm. The length of the long side of a limiting groove (limiting short side ear of the light guide plate) on the metal substrate 40 is 17.2mm, the length of the long side of the limiting groove (limiting long side ear of the light guide plate) is 30.2mm, and the length of the short side of the limiting groove is 4 mm; the Z-direction gap between the support frame boss and the light guide plate ear is 0.15mm, and a 0.15 mm-thick anti-puncture insulating tape is attached to the gap. The optical film ears are positioned above the light guide plate ears, the length of the short edge ears of the optical film is 8.5mm, the number of each edge is 2, and the ear distance is 30 mm; the length of the ears on the long side of the optical film is 15mm, the number of each side is 2, the ear distance is 50mm, and the ear width of the optical film is 3 mm; the Z-direction gap between the lug of the optical film and the groove of the support frame is 0.2mm, 0.15mm of puncture-proof insulating adhesive tape is pasted in the middle groove, and the dynamic friction coefficient mu between the surface of the adhesive tape and the optical film is less than or equal to 0.48. The barrier strip on the metal substrate is positioned between two ears of the optical film on the long/short side of the metal substrate, the gap between the barrier strip and the edge of the ear of the optical film is 0.1mm, the length of the barrier strip is 10mm, the width of the barrier strip is 1.2mm, the height of the barrier strip is 0.7mm, the barrier strip is in clearance fit with the groove at the corresponding position on the support frame, and the gap is 0.4 mm. The reflector plate is attached to the bottom and the periphery of the light guide plate in a laser dotting, folding and local bonding mode.
Example 2.
Referring to fig. 1, 2 and 3.
A low-cost high-reliability optical assembly and structure thereof: the optical combination comprises a support frame 20, an optical film material 10, a light guide plate 30, a reflector plate and a metal substrate 40 from top to bottom, as shown in fig. 1, the reflector plate is attached to the bottom surface and the periphery (not shown in the figure) of the light guide plate 30 in a laser dotting, folding and local bonding mode, the optical combination realizes the full fixation of the light guide plate in the direction X, Y through the gap design of a first ear 21 of the light guide plate and a limiting groove 22 on the metal substrate, as shown in fig. 1, the control of the Z-direction displacement and the pressure of the light guide plate is realized through the space design of a second ear 31 of the light guide plate and a support frame boss corresponding to the second; the optical combination realizes the limit of the optical film in the direction X, Y through the design of the gap between the ear 32 of the optical film and the barrier strip 33 at the corresponding position on the metal substrate, as shown in fig. 2, and realizes the control of the Z-direction displacement of the optical film material through the space design of the ear 32 of the optical film and the corresponding support frame groove in the Z-direction (as shown in fig. 1).
The size of the light guide plate is 136mm multiplied by 136mm, light enters from two sides, ears are arranged on the non-light-entering side of the light guide plate, the length of the ears of the light guide plate is 10mm, the number of each side is 2, and the distance between the ears is 65 mm; the width of the light guide plate ears is 2 mm. The length of the long edge of the ear limiting groove of the light guide plate on the metal substrate is 10.2mm, and the length of the short edge of the limiting groove is 3 mm; z-direction gaps between the frame bosses and the ears of the light guide plate are 0.3mm, closed-cell silica gel foam with the thickness of 0.3mm and the surface being a PET substrate is attached in the gaps, and the resilience of the foam is more than or equal to 75 percent. The optical film ears are positioned above the light guide plate ears, the length of each optical film ear is 5mm, the number of each edge is 2, the ear distance is 65mm, and the width of each optical film ear is 2 mm; the Z-direction gap between the lug of the optical film and the groove of the support frame is 0.2mm, silica gel foam with the thickness of 0.15mm is stuck in the middle groove, and the dynamic friction coefficient mu between the foam and the optical film is less than or equal to 0.48. The barrier strip on the metal substrate is positioned between two ears of the optical film on each side, the gap between the barrier strip and the edge of the ears of the optical film is 0.1mm, the length of the barrier strip is 10mm, the width of the barrier strip is 1.2mm, the height of the barrier strip is 0.4mm, the barrier strip is in clearance fit with the groove at the corresponding position on the support frame, and the gap is 0.2 mm. The reflector plate is attached to the bottom and the periphery of the light guide plate in a laser dotting, folding and local bonding mode.
The above description is only two specific embodiments of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the protection scope of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the protection scope of the technical solution of the present invention.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (6)
1. An optical combination structure with low cost and high reliability is characterized in that the optical combination structure sequentially comprises a support frame, an optical film material, a light guide plate, a reflecting sheet and a metal substrate from top to bottom, wherein the full fixation of the light guide plate in the X, Y direction is realized through the design of gaps between lugs of the light guide plate and limiting grooves on the metal substrate, and the Z-direction displacement and pressure control of the light guide plate are realized through the space design of the lugs of the light guide plate and corresponding support frame bosses thereof in the Z direction; spacing of the optical film in the X, Y direction is achieved through the design of gaps between the optical film ears and the barrier strips at corresponding positions on the metal substrate, and Z-direction displacement control of the optical film material is achieved through the space design of the optical film ears and the corresponding support frame grooves in the Z direction.
2. A low-cost, high-reliability optical composite structure according to claim 1, wherein: the light guide plate ear is arranged on the non-light-inlet edge of the light guide plate, and the arrangement mode is as follows: the length of the light guide plate ear is 1/2 multiplied by (15-20%) × the side length L0The number of the light guide plate is 2, the width of the ears of the light guide plate is 2-3 mm, and the distance between the ears is 30-65 mm.
3. A low-cost, high-reliability optical composite structure according to claim 1, wherein: the length of the long edge of the light guide plate ear limiting groove on the metal substrate is = the length of the long edge of the light guide plate ear +0.2mm, the length of the short edge of the limiting groove is 3-4 mm, and the gap between each limiting groove and the light guide plate ear in the width direction is 1 mm; the Z-direction gap between the support frame boss and the light guide plate ear is 0.15-0.3 mm, an insulating tape is attached to the gap or closed-cell silica gel foam with a PET substrate on the surface, and the resilience of the foam is more than or equal to 75%.
4. A low-cost, high-reliability optical composite structure according to claim 1, wherein: the optical film ears are positioned above the light guide plate ears, the length of the optical film ears is 1/2, the width of the optical film ears is consistent with the width of the light guide plate ears, the number of the optical film ears on each side is equal to that of the light guide plate ears, and the distance between the optical film ears is consistent with that of the light guide plate ears; the Z-direction gap between the ear of the optical film and the groove of the support frame is 0.2mm, silica gel foam or an insulating tape with the thickness of 0.15mm is pasted in the groove, and the dynamic friction coefficient mu between the surface of the foam or the tape and the optical film is less than or equal to 0.48.
5. A low-cost, high-reliability optical composite structure according to claim 1, wherein: the arrangement mode of the upper barrier strip of the metal substrate is as follows: the blend stop is located between two ears of the optical film on the long/short side of the metal substrate, the gap between the blend stop and the edge of the ear of the optical film is 0-0.2 mm, the length of the blend stop is 10mm +/-1 mm, the width of the blend stop is 1.2mm, the height of the blend stop is 0.4-0.7 mm, the blend stop is in clearance fit with the groove at the corresponding position on the support frame, and the clearance is 0.2-0.4 mm.
6. A low-cost, high-reliability optical composite structure according to claim 1, wherein: the reflector plate is attached to the bottom surface and the periphery of the light guide plate in a laser dotting, folding and local bonding mode.
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| CN2019104522840 | 2019-05-28 | ||
| CN201910452284 | 2019-05-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI806460B (en) * | 2021-12-14 | 2023-06-21 | 瑞儀光電股份有限公司 | Film assembly structure, backlight module and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI806460B (en) * | 2021-12-14 | 2023-06-21 | 瑞儀光電股份有限公司 | Film assembly structure, backlight module and display device |
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| CN110989067B (en) | 2020-12-15 |
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