CN113641034B - Optical module and backlight module - Google Patents
Optical module and backlight module Download PDFInfo
- Publication number
- CN113641034B CN113641034B CN202110266965.5A CN202110266965A CN113641034B CN 113641034 B CN113641034 B CN 113641034B CN 202110266965 A CN202110266965 A CN 202110266965A CN 113641034 B CN113641034 B CN 113641034B
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- Prior art keywords
- optical
- adjustment layer
- optical adjustment
- detection block
- emitting element
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- 230000003287 optical effect Effects 0.000 title claims abstract description 159
- 238000001514 detection method Methods 0.000 claims abstract description 51
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000002096 quantum dot Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 9
- 238000002310 reflectometry Methods 0.000 claims description 3
- 238000007650 screen-printing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013041 optical simulation Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses an optical module and a backlight module, comprising a circuit board, a first light-emitting element, a first optical adjusting layer and a detection block. The first light-emitting element is arranged on the circuit board; the first optical adjustment layer is arranged on the circuit board corresponding to the first light-emitting element; the detection block is arranged on the circuit board, and the detection block and the first optical adjustment layer are formed through the same procedure; the detection block is used for detecting to confirm the optical characteristics of the first optical adjustment layer. The detection block and the optical adjustment layer corresponding to the optical element are formed on the circuit board by adopting the same process, and the optical characteristics of the optical adjustment layer are known by detecting the detection block, so that the optical adjustment layer can be tracked and controlled, the optical adjustment effect of the optical adjustment layer on the corresponding light-emitting element is ensured, and the display effect of the backlight module and the display device is further ensured.
Description
Technical Field
The present invention relates to an optical module and a backlight module, and more particularly to an optical module and a backlight module capable of detecting optical characteristics of an optical adjustment layer.
Background
With the continuous development of liquid crystal display technology, the requirements for a backlight module for supplying light sources to a liquid crystal display panel are also increasing. In order to improve the light uniformity of the backlight source, an ink layer is disposed at a position corresponding to a light emitting component (e.g., an LED lamp bead) on the circuit board to adjust light, but the specification of the ink layer cannot be tracked and controlled due to the special printing area, so that the adjusting effect of the ink layer cannot be controlled.
Disclosure of Invention
The present invention is directed to an optical module and a backlight module for solving the above problems.
In order to achieve the above objective, the present invention provides an optical module, which includes a circuit board, a first light emitting element, a second optical adjustment layer, and a detection block, wherein the first light emitting element is disposed on the circuit board; the first optical adjustment layer is arranged on the circuit board corresponding to the first light-emitting element; the detection block is arranged on the circuit board, and the detection block and the first optical adjustment layer are formed through the same procedure; the detection block is used for detecting to confirm the optical characteristics of the first optical adjustment layer.
As an alternative technical scheme, the materials of the first optical adjustment layer and the detection block are fluorescent ink, black ink, red ink, blue ink or white ink.
As an alternative solution, the first optical adjustment layer and the detection block are formed by screen printing.
Alternatively, the detection block is rectangular, circular, elliptical, pentagonal or hexagonal.
As an alternative solution, the circuit board has a first width in a first direction, and the detecting block has the first width in the first direction.
As an optional technical solution, the optical characteristic includes at least one of thickness, uniformity, reflectivity, L value, a value, and b value.
As an optional technical solution, the optical module further includes a second light emitting element and a second optical adjustment layer disposed on the circuit board, the second optical adjustment layer corresponds to the second light emitting element, the second optical adjustment layer and the first optical adjustment layer are formed through a same process, and the detection block is disposed between the first optical adjustment layer and the second optical adjustment layer.
As an alternative solution, the first optical adjustment layer includes a first area and a second area that are not connected, the light emitting element is located in the first area, and the second area surrounds the first area.
In addition, the invention also provides a backlight module, which comprises a bottom plate, a reflecting sheet, the optical module and a quantum dot film, wherein the reflecting sheet is provided with a first hole; the optical module is arranged between the bottom plate and the reflecting sheet, and further comprises a first optical lens, wherein the first optical lens covers the first light-emitting element and is exposed from the first hole; the quantum dot film is arranged on the reflecting sheet and the optical module; and a part of light emitted by the first light-emitting element is reflected to the first optical adjustment layer through the first optical lens and is excited by the first optical adjustment layer to be emitted to the quantum dot film.
As an alternative solution, the first light emitting element is a blue LED, and the quantum dot film includes a red quantum dot material and a green quantum dot material.
According to the optical module, the backlight module and the display device, the detection block and the optical adjustment layer corresponding to the optical element are formed on the circuit board by adopting the same procedure, and the optical characteristics of the optical adjustment layer are known by detecting the detection block, so that the optical adjustment layer can be tracked and controlled, the optical adjustment effect of the optical adjustment layer on the corresponding light-emitting element is ensured, and the display effect of the backlight module and the display device is further ensured.
The invention will now be described in more detail with reference to the drawings and specific examples, which are not intended to limit the invention thereto.
Drawings
Fig. 1 is a cross-sectional view of a backlight module according to the present invention;
FIG. 2 is a top view of the optical module of FIG. 1;
FIG. 3 is a partial schematic view of an optical module of the present invention;
fig. 4 is a cross-sectional view of a display device of the present invention.
Detailed Description
For a further understanding of the objects, construction, features, and functions of the invention, reference should be made to the following detailed description of the preferred embodiments.
Referring to fig. 1 to 3, fig. 1 is a cross-sectional view of a backlight module according to the present invention; FIG. 2 is a top view of the optical module of FIG. 1; fig. 3 is a partial schematic view of an optical module of the present invention. As shown in fig. 1, the backlight module 1000 of the present invention includes an optical module 100, a chassis 200, a reflective sheet 300, and a quantum dot film 400. The optical module 100 is disposed between the base plate 200 and the reflective sheet 300, and the quantum dot film 400 is disposed on the reflective sheet 300 and the optical module 100.
As shown in fig. 2 and 3, the optical module 100 of the present invention includes a circuit board 110, a first light emitting element 120, a first optical adjustment layer 130, and a detection block 140. The first light emitting element 120 is disposed on the circuit board 110; the first optical adjustment layer 130 is disposed on the circuit board 110 corresponding to the first light emitting element 120; the detecting block 140 is also disposed on the circuit board 110, and the detecting block 140 and the first optical adjustment layer 130 are formed through the same process; the detection block 140 is thereby configured to detect to confirm the optical characteristics of the first optical adjustment layer 130.
In the backlight module 1000 of the present invention, the reflective sheet 300 further has a first hole (not shown), and the optical module 100 further includes a first optical lens 121, wherein the first optical lens 121 covers the first light emitting element 120 and is exposed from the first hole of the reflective sheet 300. As shown in fig. 2 and 3, the first optical adjustment layer 130 includes a first region 131 and a second region 132 that are not connected, the light emitting element 120 is located in the first region 131, and the second region 132 surrounds the first region 131. When the backlight module 1000 works, a part of light emitted by the first light emitting element 120 is reflected to the first optical adjustment layer 130 through the first optical lens 121 and is excited by the first optical adjustment layer 130 to be emitted to the quantum dot film 400. In practice, the first optical adjustment layer 130 may be configured in other shapes, but not limited to this.
Referring to fig. 4, fig. 4 is a cross-sectional view of the display device of the present invention. The display device 2000 of the present invention includes a display panel 2100 and a backlight module 1000, wherein the display panel 2100 is assembled on the backlight module 1000, and the backlight module 1000 provides a backlight source to the display panel 2100.
At present, the requirements of the display device are higher and higher, and the display device 2000 of the present embodiment adopts the direct type module 1000 and the High dynamic range imaging design (High-DYNAMIC RANGE, abbreviated as HDR) to achieve a better display effect. In this embodiment, the first light emitting element 120 is a blue LED, and the quantum dot film 400 includes a red quantum dot material and a green quantum dot material, so that the first light emitting element 120 cooperates with the quantum dot film 400 to improve the color gamut of the display device 2000. In order to avoid display defects caused by excitation of the quantum dot film 400 by the blue LED in the display screen of the display device 2000, for example, dark blue screen appears above the first light emitting element 120 or light is darker at the boundary position corresponding to the adjacent light emitting element, so that the overall display effect of the display device 2000 is poor, the present invention provides the first optical adjustment layer 130 on the circuit board 110 corresponding to the position of the first light emitting element 120. Since the first optical adjustment layer 130 is disposed corresponding to the first light emitting element 120, and the irregular large-sized block pattern thereof, the optical characteristics of the first optical adjustment layer 130 cannot be directly measured and confirmed by using the detection device. In the present invention, the first optical adjustment layer 130 and the detection block 140 are formed on the circuit board 110 by the same process, and the optical characteristics of the first optical adjustment layer 130 are known by detecting the detection block 140, so that the first optical adjustment layer 130 can be tracked and controlled, the optical adjustment effect of the first optical adjustment layer 130 on the first light emitting element 120 corresponding to the first optical adjustment layer is ensured, and the display effects of the backlight module 1000 and the display device 2000 are further ensured.
In practice, the target optical characteristics of the first optical adjustment layer 130, such as target thickness, target L, a, b values, etc., may be determined by optical simulation prior to the fabrication of the sample of the optical module 100. When the optical characteristics of the first optical adjustment layer 130 do not meet the target optical characteristics after the detection of the detection block 140, the first optical adjustment layer 130 and the detection block 140 can be adjusted by the same process, and the detection block 140 can be detected again after the adjustment until the optical characteristics of the first optical adjustment layer 130 meet the target optical characteristics. At this time, various parameters of the first optical adjustment layer 130 are recorded for application in mass production. In mass production, the detection block 140 may be detected by sampling, so as to know the optical characteristics of the first optical adjustment layer 130 in time.
In an embodiment, the materials of the first optical adjustment layer 130 and the detection block 140 are fluorescent ink, black ink, red ink, blue ink or white ink, and the first optical adjustment layer 130 and the detection block 140 can be formed by screen printing. When the backlight module 1000 works, a part of light rays emitted by the first light emitting element 120 directly pass through the first optical lens 121 and reach the quantum dot film 140 to excite the quantum dot film 140, and another part of light rays are reflected by the first optical lens 121 and reach the first optical adjustment layer 130, are adjusted by the first optical adjustment layer 130 and are emitted from the first optical lens 121 again to reach the quantum dot film 140. In practice, when the first optical adjustment layer 130 is fluorescent ink, it may be yellow fluorescent ink, and the first light emitting element 120 may be a blue LED. In practice, the backlight module 1000 may further include a diffusion plate (not shown), and the quantum dot film 400 is disposed on the diffusion plate. Still alternatively, the quantum dot film 400 may be a diffusion plate doped with a quantum dot material. The user can design according to the actual needs.
In this embodiment, the detection block 140 is rectangular. As shown in fig. 2 and 3, the circuit board 110 has a first width w1 in the first direction F1, and the detecting block 140 has a first width w1 in the first direction F1, that is, the size of the detecting block 140 is the same as the size of the circuit board 110 in the first direction F1. In the present embodiment, the first direction F1 is the width direction of the circuit board 110, so that the detection block 140 has the largest size on the circuit board 110 in the first direction F1. The detection block 140 may have a first length l1 in the second direction F2, and in this embodiment, the first length l1 is greater than the first width w1, so that the detection block 140 is rectangular. When the first length l1 is equal to the first width w1, the detection block 140 has a square shape. In practical applications, the detecting block 140 may be circular, elliptical, pentagonal, or hexagonal, and the optical detection of the detecting block 140 may be performed smoothly without being limited to the above-mentioned shape and size.
In actual operation, when the optical characteristics of the detection block 140 are measured, the optical characteristics include at least one of thickness, uniformity, reflectivity, L value, a value, and b value of the film layer. In this embodiment, the detection block 140 may be subjected to an optical three-dimensional space test of an elliptical color for human eyes by using a detection device, where the values of L, a, and b represent chromaticity values of the color of the object, that is, color space coordinates of the color, and any color has a unique coordinate value; where the L value represents darkness (black and white), the a value represents red-green, and the b value represents yellow-blue. By measuring the detecting block 140, the optical characteristics of the first optical adjustment layer 130 formed in the same process can be accurately known, and the problem that the optical adjustment effect cannot be estimated/controlled due to the incapability of monitoring the specification and quality of the first optical adjustment layer 130 can be avoided.
As shown in fig. 2 and 3, the optical module 110 further includes a second light emitting device 150 and a second optical adjustment layer 160 disposed on the circuit board 110, the second optical adjustment layer 160 corresponds to the second light emitting device 150, the second optical adjustment layer 160 and the first optical adjustment layer 130 are formed through the same process, and the detection block 140 is disposed between the first optical adjustment layer 130 and the second optical adjustment layer 160. That is, the detection block 140 is disposed at a region of the circuit board 110 where no light emitting element is disposed, for example, a region between two adjacent light emitting elements. Thus, on the one hand, the normal manufacture of the light-emitting element and the corresponding optical adjustment layer is not affected. On the other hand, as shown in fig. 1, when the optical module 100 is applied to the backlight module 1000, since the circuit board 110 is located under the reflective sheet 300, only the optical lenses corresponding to the light emitting elements are exposed from the corresponding holes on the reflective sheet 300, and at this time, the detection block 140 is blocked by the reflective sheet 300, so that the detection block 140 will not affect the light emitted by the light emitting elements when the backlight module 1000 is in operation, and the light emitting effect of the backlight module 1000 is ensured.
According to the optical module, the backlight module and the display device, the detection block and the optical adjustment layer corresponding to the optical element are formed on the circuit board by adopting the same procedure, and the optical characteristics of the optical adjustment layer are known by detecting the detection block, so that the optical adjustment layer can be tracked and controlled, the optical adjustment effect of the optical adjustment layer on the corresponding light-emitting element is ensured, and the display effect of the backlight module and the display device is further ensured.
Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. An optical module, comprising:
the electrical circuit board is provided with a plurality of circuit boards,
The first light-emitting element is arranged on the circuit board;
the first optical adjustment layer is arranged on the circuit board corresponding to the first light-emitting element; and
The detection block is arranged on the circuit board, and the detection block and the first optical adjustment layer are formed through the same procedure; the detection block is used for detecting to confirm the optical characteristics of the first optical adjustment layer;
The circuit board has a first width in a first direction, and the detection block has the first width in the first direction; the optical characteristics include at least one of thickness, uniformity, reflectivity, L value, a value, b value.
2. The optical module of claim 1, wherein: the first optical adjustment layer and the detection block are made of fluorescent ink, black ink, red ink, blue ink or white ink.
3. An optical module as claimed in claim 2, characterized in that: the first optical adjustment layer and the detection block are formed by screen printing.
4. The optical module of claim 1, wherein: the detection block is rectangular, circular, elliptical, pentagonal or hexagonal.
5. The optical module of claim 1, wherein: the optical module further comprises a second light-emitting element and a second optical adjustment layer which are arranged on the circuit board, the second optical adjustment layer corresponds to the second light-emitting element, the second optical adjustment layer and the first optical adjustment layer are formed through the same procedure, and the detection block is arranged between the first optical adjustment layer and the second optical adjustment layer.
6. The optical module of claim 1, wherein: the first optical adjustment layer comprises a first area and a second area which are not connected, the light-emitting element is positioned in the first area, and the second area surrounds the first area.
7. A backlight module, comprising:
a bottom plate;
the reflecting plate is provided with a first hole;
the optical module of any one of claims 1 to 6, disposed between the base plate and the reflective sheet, further comprising a first optical lens overlying the first light emitting element and exposed from the first hole;
the quantum dot film is arranged on the reflecting sheet and the optical module;
And a part of light emitted by the first light-emitting element is reflected to the first optical adjustment layer through the first optical lens and is emitted to the quantum dot film from the first optical adjustment layer.
8. A backlight module according to claim 7, wherein: the first light emitting element is a blue LED, and the quantum dot film comprises a red quantum dot material and a green quantum dot material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110266965.5A CN113641034B (en) | 2021-03-11 | 2021-03-11 | Optical module and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110266965.5A CN113641034B (en) | 2021-03-11 | 2021-03-11 | Optical module and backlight module |
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| Publication Number | Publication Date |
|---|---|
| CN113641034A CN113641034A (en) | 2021-11-12 |
| CN113641034B true CN113641034B (en) | 2024-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110266965.5A Active CN113641034B (en) | 2021-03-11 | 2021-03-11 | Optical module and backlight module |
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| CN (1) | CN113641034B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115684032A (en) * | 2022-10-28 | 2023-02-03 | 佛山市国星光电股份有限公司 | Quality inspection method for reflective ink of backlight module and backlight module |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007121833A (en) * | 2005-10-31 | 2007-05-17 | Epson Imaging Devices Corp | Inspecting method and inspection pattern for electrooptical device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100572441B1 (en) * | 1999-11-30 | 2006-04-18 | 오므론 가부시키가이샤 | Equipment using optics |
| JP3800927B2 (en) * | 2000-05-26 | 2006-07-26 | セイコーエプソン株式会社 | Manufacturing method of liquid crystal substrate, liquid crystal substrate, substrate for liquid crystal device, and liquid crystal device |
| JP5211433B2 (en) * | 2005-03-24 | 2013-06-12 | 東レ株式会社 | LED reflector |
| JP2008170496A (en) * | 2007-01-09 | 2008-07-24 | ▲ぎょく▼瀚科技股▲ふん▼有限公司 | Backlight module with fluorescent layer and display device |
| KR100996919B1 (en) * | 2008-07-08 | 2010-11-26 | (주) 아모엘이디 | Semiconductor package |
| DE202009018419U1 (en) * | 2009-03-09 | 2011-08-17 | Tridonic Jennersdorf Gmbh | LED module with improved light output |
| JP5572013B2 (en) * | 2010-06-16 | 2014-08-13 | スタンレー電気株式会社 | Light emitting device and manufacturing method thereof |
| KR102203950B1 (en) * | 2014-02-05 | 2021-01-19 | 삼성디스플레이 주식회사 | Light source module, backlight assembly including the same, and display device including the light source module |
| CN104948949B (en) * | 2015-05-14 | 2018-03-09 | 达亮电子（苏州）有限公司 | Light emitting module |
| CN111338119B (en) * | 2018-12-19 | 2023-01-03 | 上海仪电显示材料有限公司 | Color filter substrate and chromaticity measuring method |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007121833A (en) * | 2005-10-31 | 2007-05-17 | Epson Imaging Devices Corp | Inspecting method and inspection pattern for electrooptical device |
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