CN207114820U - A kind of backlight module - Google Patents
A kind of backlight module Download PDFInfo
- Publication number
- CN207114820U CN207114820U CN201720383266.8U CN201720383266U CN207114820U CN 207114820 U CN207114820 U CN 207114820U CN 201720383266 U CN201720383266 U CN 201720383266U CN 207114820 U CN207114820 U CN 207114820U
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- light
- guide plate
- circular arc
- trend
- exiting surface
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Abstract
A kind of light guide plate and the backlight module using the light guide plate are the utility model is related to, the light guide plate includes an at least incidence surface, an exiting surface orthogonal with the incidence surface；The X-axis bearing of trend of the incidence surface receives light source and provides light, light and exiting surface Y-axis bearing of trend parallel transmission, the exiting surface sets a plurality of circular arc cylinder in X-axis bearing of trend, wherein, set fluted between adjacent circular arc cylinder, circular arc cylinder is arranged on exiting surface along exiting surface Y-axis bearing of trend, guide light can in light guide plate parallel transmission, meanwhile in backlight module control circuit selecting lighting arranged in parallel spot light, form different guide-lighting regions；The beneficial effects of the utility model are：It is integrally formed using the light guide plate of micro-structural, it is uneven to be effectively reduced light source mixed light caused by light field between different backlights influences each other, and the optical quality of backlight module is lifted while multi-section display is ensured.
Description
Technical field
Backlight display field is the utility model is related to, more particularly to a kind of backlight module.
Background technology
Light in itself and can not be produced due to the liquid crystal display panel that is imaged in a liquid crystal display device, it is necessary to thoroughly
Backlight module is crossed to provide light source so that image is presented on display panel, and for known technology, can be by display panel
Dividing into multiple viewing areas and each viewing area has corresponding backlight, when different backlights are opened simultaneously,
Although the backlight corresponding to each viewing area provides the light source of different brightness, but because of the light between different backlights
Field-effect influences, i.e., each viewing area may be disturbed by backlight corresponding to its adjacent display areas domain, and causes most Zhongdao
The intrinsic brilliance and non-primary object brightness that corresponding viewing area is shown so that the harmony of overall picture becomes
It is poor.Also therefore, for the problems of subregion dimming mode, another structure design is then developed in known technology
To improve above-mentioned missing, it is the known structural representation with the splicing of multizone light guide plate, is added between adjacent light guide plate
If light blocker unit, with the feelings for avoiding light caused by backlight from being incident to neighbouring sub-viewing areas and interfering
Shape, in other words, that is, reach the interactional purpose of light field between the different backlights of reduction.However, in multizone backlight mould
In block structure, although the light blocker unit between backlight can reduce the problem of part light field influences, actually because
Light have be casually arranged with or the characteristic of diffraction and can not highly desirable solve light field and influence each other, the mutually barrier list of viewing area
Bright line is also easy to produce between member, in addition in actual production, light blocker unit needs and display panel has accurately contraposition can be only achieved
Good light barriering effect, so also add difficulty during production.
Based on it is above-mentioned the shortcomings that, the utility model proposes a kind of backlight module, without using the splicing of more light guide plates and photoresistance
In the case of unit, the problem of light field between different backlights influences each other is effectively reduced.How to be lighted in subregion luminous
Reduced while area and light leak and avoid the gap for allowing audience to discover light guide plate, actually the important topic of current backlight module it
One.
Utility model content
The problem of to overcome the uneven light source mixed light caused by Partitioned light-guiding in the prior art and bright line, the utility model
A kind of partition type light guide plate with higher display effect is provided.
A purpose of the present utility model is, there is provided a kind of backlight module, to improve the light source caused by Partitioned light-guiding
Bright line problem caused by the uneven and multiple light guide plate splicing of mixed light.
Backlight module provided by the utility model, including：One backlight, a light guide plate and a control circuit：The backlight
Source includes parallel arrangement of plurality of points light source；The light guide plate includes an at least incidence surface, a light extraction orthogonal with the incidence surface
Face；The incidence surface X-axis bearing of trend receive light, light in exiting surface Y-axis bearing of trend parallel transmission, wherein, it is described
Exiting surface X-axis bearing of trend sets a plurality of circular arc cylinder, and fluted, spot light and circular arc cylinder are set between adjacent circular arc cylinder
Spacing C meet formula:C=B/2tg(θ/2)；Wherein, spacing of the B between adjacent spot light, θ are the incidence that spot light is formed
Angle, θ, circular arc cylinder are arranged on light guide plate exiting surface along the exiting surface Y-axis bearing of trend, enable light in leaded light
Parallel transmission in plate；The control circuit, selecting lighting or the spot light for closing arranged in parallel, for controlling in the leaded light
Transmitted on plate by specific direction, form the first guide-lighting region and the second guide-lighting region, can also be lighted in current backlight subregion
When control the brightness of other backlight subareas.
Further, the number ratio of the spot light collocation circular arc cylinder arrangement is between 1:1 to 1:5 scope.
Further, it is characterised in that：The light guide plate is integrally formed by die-cutting process.
The utility model arranges multiple micro-structural circular arc cylinders by the exiting surface in light guide plate by specific spacing and height,
The direct of travel of light is improved when the light of spot light such as light emitting diode is passed through the surface of circular arc cylinder, and then is changed guide-lighting
The optical field distribution of intralamellar part, improve caused by Partitioned light-guiding that light source mixed light is uneven and light guide plate splicing caused by bright line ask
Topic.
Brief description of the drawings
Fig. 1 shows the stereogram according to the utility model backlight module；
Fig. 2 shows the plan of the utility model backlight module；
Fig. 3 shows the use state figure according to the utility model first embodiment；
Fig. 4 shows the use state figure according to the utility model second embodiment；
Fig. 5 shows the use state figure according to the utility model 3rd embodiment；
Wherein, description of reference numerals is as follows：
The light guide plate of 10 backlight 20
The spot light of 30 control circuit 30 101 first
103 second spot lights 105 thirdly light source
The subregion of 102 first subregion 104 second
106 the 3rd subregion, 107 first guide-lighting region
The 108 second guide-lighting incidence surfaces of region 201
The circular arc cylinder of 202 exiting surface 203
The adjacent spot lights of θ spot light incident angles B spacing
Distance between C backlights and circular arc cylinder
Embodiment
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings：
The utility model provides a kind of light guide plate 20, including at least an incidence surface 201, one is just being surrendered with the incidence surface 201
Smooth surface 202；Incidence surface 201 receives light, light and exiting surface 202Y axle bearing of trend parallel transmissions in X-axis bearing of trend, its
In, exiting surface 202 sets a plurality of circular arc cylinder 203 in X-axis bearing of trend, and fluted E is set between adjacent circular arc cylinder 203
（It is not shown）, Y-axis bearing of trend of the circular arc cylinder 203 along exiting surface 202 and be arranged on light guide plate 20, enable light parallel
Transmission, forms uniform area source.
In addition, the top of light guide plate 20 may also include diffusion sheet, brightness enhancement film, combined optical film or its combination, visual demand
Adjustment.Multiple sites can be formed by working process such as sandblasting in the bottom of light guide plate 20 or form micro-structural, to increase leaded light
The light utilization of plate 20 and guide-lighting ability.When light by with rough surface circular arc cylinder 203 enter light guide plate 20 after,
The uneven phenomenon for causing bright blanking bar periodic distribution of the mixed light of backlight 10 can be improved.
A kind of backlight module for above-mentioned light guide plate provided by the utility model includes：Backlight 10, the and of light guide plate 20
Control circuit 30（It is not shown）：Backlight 10 includes parallel arrangement of plurality of points light source；Light guide plate 20 enters light including at least one
The exiting surface 202 orthogonal with the incidence surface 201 of face 201, one；Incidence surface 201 receives light source in X-axis bearing of trend and provides light,
Light exiting surface 202 Y-axis bearing of trend parallel transmission, wherein, the X-axis bearing of trend of exiting surface 202 sets a plurality of circular arc
Cylinder 203, fluted E is set between adjacent circular arc cylinder 203（It is not shown）, circular arc cylinder 203 sets along Y-axis bearing of trend
In exiting surface 202.The spot light of arranged in parallel is lighted or closed to the selectivity of control circuit 30, and light is parallel equal on light guide plate 20
Even transmission, the first guide-lighting 107 and second guide-lighting region 108 of region is formed, also can control other when current backlight subregion is lighted
The brightness of backlight subarea.
Based on above-mentioned, light guide plate of the present utility model is by that can change the spacing of strip adjacent circular arc cylinder, backlight enters
Firing angle degree obtains required parallel surface distribution of light sources, is effectively reduced caused by light field between different backlights influences each other
Light source mixed light is uneven and stitching portion produces the problem of becoming clear line.Several embodiments will be enumerated below, and with reference to schema for this
Utility model carries out detailed explanation.
Figures 1 and 2 show that overall structure and floor map according to backlight module of the present utility model, refer to figure
1 and Fig. 2, backlight 10 include the first spot light 101, thirdly the second spot light 103, light source 105, and each spot light is according to position
Distribution is put each mainly to provide each display subregion 10 in display unit, the first spot light 101 is mainly used in offer first
Light source needed for subregion 102, secondary light source are mainly used in providing the light source needed for the second subregion 104, and thirdly light source 105 is used for
There is provided the light source 10 needed for the 3rd subregion 106, control circuit 30 lights the first spot light 101, the second spot light 103, thirdly
Light source 105 being lighted and closing, when lighting a spot light 101, the second spot light 103, when closing thirdly light source 105, and light
After the refraction of circular arc cylinder 203 the first guide-lighting region 107 is formed in Y-axis bearing of trend parallel expansion.In order to reach parallel face
Light source effect, backlight 10 according to different size the first spot light 101, the second spot light 103 or thirdly light source 105 formed
Incident angle θ, the spacing of back of the body circular arc cylinder 203 and backlight 10 need to meet such as minor function：C=B/2tg(θ/2)；Wherein, B is phase
Spacing between adjoint point light source, the number ratio of each spot light collocation circular arc cylinder arrangement is between 1:1 to 1:5 model
Enclose.
Fig. 3 shows the use state figure according to the utility model first embodiment；Due to traditional side entrance back mould
Group only has row's light source, so carry out that the quantity of subregion is very limited to it, the light guide plate 20 of the utility model embodiment by
Exiting surface 202 sets circular arc cylinder 203, groove E interval between adjustment adjacent circular arc cylinder 203, and control circuit 30 lights the
One spot light 101 and the second spot light 103, when closing thirdly light source 105, light is after the refraction of circular arc cylinder 203 in light extraction
The Y-axis bearing of trend parallel expansion in face 202, the first subregion 102 and the second subregion 104 form the first guide-lighting region 107.
Fig. 4 shows the use state figure according to the utility model second embodiment, and control circuit 30 lights second point light
When source 103, closing and the first spot light 101 and thirdly light source 105, light is after the refraction of circular arc cylinder 203 in exiting surface 202
Y-axis bearing of trend parallel expansion, the second subregion 104 formed the firstth guide-lighting region 107.
Fig. 5 shows the use state figure according to the utility model 3rd embodiment, and control circuit 30 lights second point light
When source 103, closing and the first spot light 101 and thirdly light source 105, light prolongs after 203 refractions in the Y-axis of exiting surface 202
Direction parallel expansion is stretched, the first subregion 102 forms the first guide-lighting region 107, and the 3rd subregion 106 forms the second guide-lighting region 108.
Above content is to combine specific embodiment further detailed description of the utility model, it is impossible to is assert
Specific implementation of the present utility model is confined to these explanations, for the utility model person of an ordinary skill in the technical field
For, without departing from the concept of the premise utility, some simple deduction or replace can also be made, should all be considered as category
In the scope of protection of the utility model.
Claims (3)
- A kind of 1. backlight module, it is characterised in that including：One backlight, a light guide plate and a control circuit：The backlight bag Include parallel arrangement of plurality of points light source；The light guide plate includes an at least incidence surface, an exiting surface orthogonal with the incidence surface；Institute State incidence surface X-axis bearing of trend receive light, light in exiting surface Y-axis bearing of trend parallel transmission, wherein, the exiting surface X-axis bearing of trend sets a plurality of circular arc cylinder, and fluted, the spacing of spot light and circular arc cylinder is set between adjacent circular arc cylinder C meets formula:C=B/2tg(θ/2)；Wherein, spacing of the B between adjacent spot light, θ are the incident angle θ that spot light is formed, Circular arc cylinder is arranged on light guide plate exiting surface along the exiting surface Y-axis bearing of trend, light is put down in light guide plate Row transmission；The control circuit, selecting lighting or the spot light for closing arranged in parallel, are pressed for controlling on the light guide plate Specific direction transmits, and forms the first guide-lighting region and the second guide-lighting region, also can control other when current backlight subregion is lighted The brightness of backlight subarea.
- 2. backlight module according to claim 1, the number ratio of the spot light collocation circular arc cylinder arrangement is situated between In 1:1 to 1:5 scope.
- 3. backlight module according to claim 1, it is characterised in that：The light guide plate is integrally formed by die-cutting process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720383266.8U CN207114820U (en) | 2017-04-13 | 2017-04-13 | A kind of backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720383266.8U CN207114820U (en) | 2017-04-13 | 2017-04-13 | A kind of backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207114820U true CN207114820U (en) | 2018-03-16 |
Family
ID=61596561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720383266.8U Active CN207114820U (en) | 2017-04-13 | 2017-04-13 | A kind of backlight module |
Country Status (1)
| Country | Link |
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| CN (1) | CN207114820U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219585A (en) * | 2017-04-13 | 2017-09-29 | 芜湖德仓光电有限公司 | A kind of light guide plate and the backlight module using the light guide plate |
| CN109143680A (en) * | 2018-08-31 | 2019-01-04 | 青岛海信电器股份有限公司 | A kind of backlight module and display device |
-
2017
- 2017-04-13 CN CN201720383266.8U patent/CN207114820U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219585A (en) * | 2017-04-13 | 2017-09-29 | 芜湖德仓光电有限公司 | A kind of light guide plate and the backlight module using the light guide plate |
| CN109143680A (en) * | 2018-08-31 | 2019-01-04 | 青岛海信电器股份有限公司 | A kind of backlight module and display device |
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