CN202452316U - Backlight source and display device - Google Patents
Backlight source and display device Download PDFInfo
- Publication number
- CN202452316U CN202452316U CN2012201037461U CN201220103746U CN202452316U CN 202452316 U CN202452316 U CN 202452316U CN 2012201037461 U CN2012201037461 U CN 2012201037461U CN 201220103746 U CN201220103746 U CN 201220103746U CN 202452316 U CN202452316 U CN 202452316U
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- backlight
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- guide plate
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Abstract
The utility model relates to the technical field of displaying, in particular to a backlight source and a display device. The backlight source comprises a light guide plate, a light source and a grating layer, wherein a plurality of continuous trapezoid protrusions are arranged at the upper portion of the light guide plate, a light shielding layer is arranged on the upper surfaces of the trapezoid protrusions, and the grating layer is arranged on the light guide plate. According to the backlight source and the display device, the upper surface of the light guide plate adopts micro-structures so that light emitted by the backlight source can form polarized light consistent with a light transmitting shaft of a lower polaroid, the light transmitting rate of the lower polaroid is greatly improved, and display brightness of a displayer is improved.
Description
Technical field
The utility model relates to the Display Technique field, particularly relates to a kind ofly can improving light utilization efficiency, the backlight that improves display brightness with have the display unit of this backlight.
Background technology
Usually, TFT-LCD (Thin Film Transistor-Liquid Crystal Display, Thin Film Transistor-LCD) primary structure partly is made up of array base palte, color membrane substrates, polarizer, backlight and liquid crystal etc.Vacuum to box technology in, liquid crystal is filled between array base palte and the color membrane substrates, carry out afterwards box, adopt envelope frame glue that four bandings are adorned simultaneously.After the box completion, on color membrane substrates and array base palte, attach upper and lower polaroid respectively, combine to form final liquid crystal indicator again with backlight.Because following polarizer has selectivity to the light angle of printing opacity, could be able to pass through with the consistent light of following polarizer light transmission shaft.Because the light that existing common backlight sends is generally non-polarized light, when passing through the following polarizer of LCDs, always have 50% loss, cause the light transmittance of light very limited, reduced screen brightness.
In order to solve the low problem of light transmission rate, adopt the DBEF brightness enhancement film that attaches the production of 3M company to improve the transmitance of light in the prior art usually.But, increased the weight of the processing cost of LCD final products because the price comparison of this product is expensive.
The utility model content
The technical problem that (one) will solve
The technical problem that the utility model will solve is how to provide a kind of can improve light transmission rate, strengthens display brightness and low-cost backlight and display unit.
(2) technical scheme
In order to solve the problems of the technologies described above; The utility model provides a kind of backlight; Comprise: LGP, light source and grating layer, the side of said LGP is provided with light source, and the top of said LGP is provided with a plurality of continuous trapezoidal convexities; Said trapezoidal convex upper surface is provided with light shield layer, and said grating layer is located at the top of LGP.
Further, the equal and opposite in direction of said convexity.
Further, said convexity is an isosceles trapezoid.
Further, the said isosceles trapezoid middle part of the side and the horizontal angular range of bottom surface of light guide plate are more than or equal to 60 °.
Further, said two waists in trapezoidal are protruding toward the outer side arc.
Further, the top tangent line of said curved waist and the horizontal angle of bottom surface of light guide plate are more than or equal to 60 °.
Further, the pitch of said grating layer is wide is 100-200nm.
Further, the bottom of said LGP is provided with the reflection site.
Further, said light shield layer is a metallic film, and said metallic film is attached to trapezoidal convex upper surface.
On the other hand, the utility model also provides a kind of display unit, comprises above-mentioned backlight.
(3) beneficial effect
Technique scheme has following advantage: backlight that the utility model provides and display unit; The LGP upper surface is adopted micro-structural; Make the light that sends from backlight can form and the consistent polarised light of following polarizer light transmission shaft; Thereby greatly improved the light transmission rate of time polarizer, increased the display brightness of display.
Description of drawings
Fig. 1 is the utility model embodiment back light source structure sketch map;
Fig. 2 be light in the utility model embodiment grating layer incident angle and light transmission rate concern sketch map;
Fig. 3 is a LGP emergent ray angular range sketch map in the utility model embodiment backlight;
Fig. 4 is another sketch map of LGP emergent ray angular range in the utility model embodiment backlight.
Wherein, 1: LGP; 2: light shield layer; 3: grating layer; 11: convexity; 12: the reflection site; 4: light source.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail.Following examples are used to explain the utility model, but are not used for limiting the scope of the utility model.Need to prove that " upper surface " described in the utility model, " top " etc. are just explained with reference to accompanying drawing, and be not used in the technical scheme that limits the utility model.As shown in Figure 1; The utility model embodiment backlight comprises: LGP 1, light source 4 and grating layer 3, and the side of this LGP 1 is provided with light source 4, for LGP 1 provides the side entering type light source; The bottom of LGP 1 is provided with reflection site 12; The top of this LGP 1 is provided with a plurality of continuous trapezoidal protruding 11, and this trapezoidal upper surface of protruding 11 is provided with light shield layer 2, and grating layer 3 is located at the top of LGP 1.Said protruding 11 equal and opposite in direction, this convexity 11 is an isosceles trapezoid.Light shield layer 2 adopts metallic film in the present embodiment, and this metallic film is attached to trapezoidal protruding 11 upper surface.Need to prove that this light shield layer is not limited to adopt metallic film, only need to realize light tight getting final product.Because the top of this LGP 1 is the isosceles trapezoid bulge-structure; And the trapezoidal upper surface of these isosceles attaches the metallic film that plays interception; Therefore, reflex can only take place and refraction effect not take place in light when LGP 1 inside is mapped on the plane that has attached metallic film.When the light of reflection arrives the bottom of LGP 1,, promptly reflex to again on the trapezoidal structure of these isosceles because the scattering process of LGP 1 bottom reflection site 12 makes light be transmitted into the surface of LGP 1 again.So repeatedly, on light reflexes to trapezoidal protruding 11 waist limit.Because this trapezoidal waist limit does not attach metallic film, the light that reflexes to this waist limit can reflect.Need have certain angle owing to be mapped to the light on limit, the trapezoidal middle part of the side, make the light of its outgoing also define in certain angular range.The angle light of this outgoing gets into the grating layer that is positioned at the LGP top, the light that penetrates from grating layer and then become polarised light.
This grating layer 3 is a nanometer grating; Its pitch is wide to be 100-200nm, much smaller than light wavelength, because this grating layer 3 can reach nano-scale; Its traditional optical grating diffraction effect disappears; And then substituted be polarization effect, the component that the polarization direction is parallel to metal wire is reflected, the polarization direction sees through grating perpendicular to the component of metal wire.
Usually the scope of the visible wavelength of finding of naked eye is 400-700nm, chooses 450nm, 550nm and three wavelength of 650nm at present, and the incident angle of its nanometer grating and the relation of transmitance see also Fig. 2.This incident angle is the angle between incident ray and the normal, and the both sides that are positioned at normal of this incident ray symmetry can directly draw from Fig. 2 when incident angle is+30 °, and the light transmission rate in the nanometer grating is maximum.In like manner, when the angle that is positioned at incident ray and the normal of normal opposite side was-30 °, the light transmission rate in this nanometer grating was also maximum.
As shown in Figure 3, be the angular range sketch map of LGP emergent ray.From figure, can find out; Setting trapezoidal waist limit and the angle between the bottom surface of light guide plate horizontal line is c; And the angular range a of the emergent ray that penetrates from trapezoidal waist limit is at 0～180 °-c; In order to improve the incident angle that gets into grating layer ± 30 ° scope, need to satisfy 90 °-c≤30 °, draw c>=60 °.
As shown in Figure 4, be another sketch map of angular range of LGP emergent ray.Two waists in trapezoidal in the present embodiment also can be for being protruding toward the outer side arc.Need to prove, the trapezoidal shape among the application with usually assert trapezoidal some is different, that sets among the application is trapezoidal; Its upper and lower both sides are outside the straight line; Its two waist can be straight line, also can in order to express easily adopt trapezoidal this describing mode for being protruding toward the outer side arc.The top tangent line of this curved waist and the horizontal angle of bottom surface of light guide plate are more than or equal to 60 °.The trapezoidal micro-structural of arc is adopted on LGP 1 top, makes the light that sends from backlight can form and the consistent polarised light of following polarizer light transmission shaft, thereby has greatly improved the light transmission rate of time polarizer, increases the display brightness of display.
In addition, the utility model also provides a kind of display unit, comprises above-mentioned described back light source structure.This display unit can be LCD, panel computer, dull and stereotyped mobile phone or other electronic display units.
The display unit that the utility model provides; Micro-structural is adopted on the LGP surface; Make the light that sends from backlight can form and the consistent polarised light of following polarizer light transmission shaft, thereby greatly improved the light transmission rate of time polarizer, increase the display brightness of display.
The above only is the preferred implementation of the utility model; Should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the utility model know-why, can also make some improvement and replacement, these improvement and replacement also should be regarded as the protection domain of the utility model.
Claims (10)
1. a backlight is characterized in that, comprising: LGP, light source and grating layer; The side of said LGP is provided with light source; The top of said LGP is provided with a plurality of continuous trapezoidal convexities, and said trapezoidal convex upper surface is provided with light shield layer, and said grating layer is located at the top of LGP.
2. backlight as claimed in claim 1 is characterized in that, the equal and opposite in direction of said convexity.
3. backlight as claimed in claim 2 is characterized in that, said convexity is an isosceles trapezoid.
4. backlight as claimed in claim 3 is characterized in that, the horizontal angular range of the said isosceles trapezoid middle part of the side and bottom surface of light guide plate is more than or equal to 60 °.
5. backlight as claimed in claim 1 is characterized in that, said two waists in trapezoidal are protruding toward the outer side arc.
6. backlight as claimed in claim 5 is characterized in that, the top tangent line of said curved waist and the horizontal angle of bottom surface of light guide plate are more than or equal to 60 °.
7. backlight as claimed in claim 1 is characterized in that, the pitch of said grating layer is wide to be 100-200nm.
8. backlight as claimed in claim 1 is characterized in that, the bottom of said LGP is provided with the reflection site.
9. backlight as claimed in claim 1 is characterized in that, said light shield layer is a metallic film, and said metallic film is attached to trapezoidal convex upper surface.
10. a display unit is characterized in that, comprises each described backlight among the claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201037461U CN202452316U (en) | 2012-03-19 | 2012-03-19 | Backlight source and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201037461U CN202452316U (en) | 2012-03-19 | 2012-03-19 | Backlight source and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202452316U true CN202452316U (en) | 2012-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201037461U Expired - Lifetime CN202452316U (en) | 2012-03-19 | 2012-03-19 | Backlight source and display device |
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| Country | Link |
|---|---|
| CN (1) | CN202452316U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105404053A (en) * | 2015-12-04 | 2016-03-16 | 青岛海信电器股份有限公司 | Backlight module set and display device |
| CN106654028A (en) * | 2016-11-29 | 2017-05-10 | 天津市中环量子科技有限公司 | Active brightness enhancement film and preparation method therefor |
| CN107272250A (en) * | 2017-07-07 | 2017-10-20 | 上海天马微电子有限公司 | A kind of display panel and display device |
| CN110263773A (en) * | 2019-07-31 | 2019-09-20 | 厦门天马微电子有限公司 | The production method of display module, display device and grating membrane material layer |
-
2012
- 2012-03-19 CN CN2012201037461U patent/CN202452316U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105404053A (en) * | 2015-12-04 | 2016-03-16 | 青岛海信电器股份有限公司 | Backlight module set and display device |
| CN106654028A (en) * | 2016-11-29 | 2017-05-10 | 天津市中环量子科技有限公司 | Active brightness enhancement film and preparation method therefor |
| CN107272250A (en) * | 2017-07-07 | 2017-10-20 | 上海天马微电子有限公司 | A kind of display panel and display device |
| CN107272250B (en) * | 2017-07-07 | 2019-11-05 | 上海天马微电子有限公司 | A kind of display panel and display device |
| CN110263773A (en) * | 2019-07-31 | 2019-09-20 | 厦门天马微电子有限公司 | The production method of display module, display device and grating membrane material layer |
| CN110263773B (en) * | 2019-07-31 | 2021-08-06 | 厦门天马微电子有限公司 | Display module, display device and manufacturing method of grating film layer |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120926 |