CN106195766A - A kind of backlight, display device and control method thereof - Google Patents
A kind of backlight, display device and control method thereof Download PDFInfo
- Publication number
- CN106195766A CN106195766A CN201610548201.4A CN201610548201A CN106195766A CN 106195766 A CN106195766 A CN 106195766A CN 201610548201 A CN201610548201 A CN 201610548201A CN 106195766 A CN106195766 A CN 106195766A
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- China
- Prior art keywords
- light source
- wedge shape
- conduction board
- outside
- backlight
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
Abstract
The embodiment of the present invention provides a kind of backlight, display device and control method thereof, relates to Display Technique field, and this display device both can carry out narrow visual angle and show, can carry out again wide viewing angle and show.This backlight includes that Wedge shape light conduction board, described Wedge shape light conduction board include the bottom surface that exiting surface is relative with described exiting surface, and side, described side be shaped as rectangle；Also include the first light source and secondary light source；Described first light source is arranged on the outside of the described side of described Wedge shape light conduction board, is used for sending collimated light；Described secondary light source is arranged on the outside of the described bottom surface of described Wedge shape light conduction board；And/or, described secondary light source is arranged on the outside of the described side of described Wedge shape light conduction board；And/or, described secondary light source is arranged on the side relative with described side of described Wedge shape light conduction board；Described secondary light source is used for sending diverging light.Show and wide viewing angle shows for realizing narrow visual angle.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of backlight, display device and control method thereof.
Background technology
In recent years, along with science and technology growing, all kinds of display devices gradually grow up.On this basis, use
Family is more and more higher to the performance requirement of display device.Wherein, along with mobile office, the increasing and high of open working environment
It is universal that resolution shows, the demand that user shows for narrow visual angle also gets more and more.
At present, due to display device, there is in space luminous visual angle widely so that screen message is peeped to take and become increasingly
Easily, so that the safety of information is affected, such as certain user, it can read some secret letters in public places
Breath, and owing to display device luminescence visual angle is big, by surrounding, other people see in meeting, thus make troubles to user, thus exploitation
The display device with peep-proof function the narrowest visual angle display function has obtained paying close attention to the most widely.
Summary of the invention
Embodiments of the invention provide a kind of backlight, display device and control method thereof, and this display device both can be entered
The narrow visual angle of row shows, can carry out again wide viewing angle and show.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
First aspect, it is provided that a kind of backlight, including Wedge shape light conduction board, described Wedge shape light conduction board includes exiting surface and institute
State the bottom surface that exiting surface is relative, and side, described side be shaped as rectangle；Also include the first light source and secondary light source；Institute
State the outside that the first light source is arranged on described first side of described Wedge shape light conduction board, be used for sending collimated light；Described second light
Source is arranged at the outside of the described bottom surface of described Wedge shape light conduction board；And/or, described secondary light source is arranged on described wedge shape and leads
The outside of the described side of tabula rasa；And/or, described secondary light source is arranged on the relative with described side of described Wedge shape light conduction board
Side；Described secondary light source is used for sending diverging light.
Preferably, described secondary light source is arranged on the outside of described bottom surface of described Wedge shape light conduction board；Or, described second
Light source is simultaneously located at outside and the outside of described bottom surface of the described side of described Wedge shape light conduction board；Or, described second light
Source is simultaneously located at the outside of the described side of described Wedge shape light conduction board and the side relative with described side.
Preferably, the described bottom surface of described Wedge shape light conduction board is tabular surface, and described bottom surface is α, θ with the angle of described side
＜ α ＜ 90 °；Wherein, θ is the critical angle that described Wedge shape light conduction board occurs total reflection.
It is further preferred that the angle of described bottom surface and described side is 45 °.
Preferably, described bottom surface includes the first plane and the second plane；Described first plane is parallel to each other, and described first
Plane is connected by described second plane；Described first plane is β, θ ＜ β ＜ 90 ° with the angle of described side；Wherein, θ is institute
State Wedge shape light conduction board and the critical angle of total reflection occurs.
It is further preferred that the angle of described first plane and described side is 45 °.
Preferably, described first light source includes multiple first LED and collimating lens；Described collimating lens is arranged on described
The light emission side of the first LED, and the light collimated lens outgoing that described first LED sends.
Preferably, described secondary light source includes multiple second LED；It is arranged on described wedge shape guide-lighting at described secondary light source
In the case of the outside of the described side of plate, at least provided with first LED between adjacent two the second LED.
It is further preferred that be arranged on two LED of the arbitrary neighborhood in the outside of the described side of described Wedge shape light conduction board
Spacing between lamp is equal.
Preferably, described secondary light source is arranged on the outside of described bottom surface of described Wedge shape light conduction board and described side
Outside；Wherein, close near described side of described second LED in outside of the described bottom surface of described Wedge shape light conduction board it is arranged on
Degree is less than the density away from described side.
Second aspect, it is provided that a kind of display device, including backlight and display floater, described backlight is above-mentioned backlight
Source.
Preferably, above-mentioned display device also includes controller；Described controller and the first light source and secondary light source are all connected with,
For controlling described first light source and the opening and closing of described secondary light source.
The third aspect, it is provided that the control method of a kind of above-mentioned display device, including: control the first light source and open, second
Light source is closed, and shows carrying out narrow visual angle；Control described secondary light source to open, show carrying out wide viewing angle.
The embodiment of the present invention provides a kind of backlight, display device and control method thereof, backlight include the first light source and
Secondary light source, if the first light source is opened, secondary light source is closed, the just collimated light sent due to the first light source, thus, the first light
After the light that source sends injects Wedge shape light conduction board, narrower from the angle of the light of the exiting surface outgoing of Wedge shape light conduction board, when by this back of the body
Light source applications, when display device, the most i.e. can realize narrow visual angle and show；If secondary light source is opened, (the first light source can be beaten
Open, it is also possible to close) time, the just diverging light that sends due to secondary light source, thus through the exiting surface outgoing of Wedge shape light conduction board
The angle of light is relatively big, the most i.e. can realize wide viewing angle and show.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
The structural representation one of a kind of backlight that Fig. 1 provides for the embodiment of the present invention；
The structural representation two of a kind of backlight that Fig. 2 provides for the embodiment of the present invention；
The structural representation three of a kind of backlight that Fig. 3 provides for the embodiment of the present invention；
The structural representation four of a kind of backlight that Fig. 4 provides for the embodiment of the present invention；
The structural representation five of a kind of backlight that Fig. 5 (a) provides for the embodiment of the present invention；
The structural representation six of a kind of backlight that Fig. 5 (b) provides for the embodiment of the present invention；
The structural representation seven of a kind of backlight that Fig. 5 (c) provides for the embodiment of the present invention；
The structural representation one of a kind of display device that Fig. 6 provides for the embodiment of the present invention；
The structural representation two of a kind of display device that Fig. 7 provides for the embodiment of the present invention；
The schematic flow sheet of the control method of a kind of display device that Fig. 8 provides for the embodiment of the present invention.
Reference:
01-backlight；02-display floater；10-Wedge shape light conduction board；101-exiting surface；102-bottom surface；1021-first is flat
Face；1022-the second plane；103-side；20-the first light source；201-the first LED；202-collimating lens；203-PCB plate；
204-the second LED；30-secondary light source；40-controller.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
The embodiment of the present invention provides a kind of backlight, as Figure 1-Figure 5, including Wedge shape light conduction board 10, Wedge shape light conduction board
10 include the bottom surface 102 that exiting surface 101 is relative with exiting surface 101, and side 103, side 103 be shaped as rectangle；Also wrap
Include the first light source 20 and secondary light source 30；First light source 20 is arranged on the outside of the side 103 of Wedge shape light conduction board 10, is used for sending
Collimated light；Secondary light source 30 is arranged on the outside of the bottom surface 102 of Wedge shape light conduction board 10；And/or, secondary light source 30 is arranged on wedge shape
The outside of the side 103 of light guide plate 10；And/or, secondary light source 30 is arranged on relative with side 103 of Wedge shape light conduction board 10
Side；Secondary light source 30 is used for sending diverging light.
It should be noted that first, the first light source 20 and secondary light source 30 are not defined, if the first light source 20
Can send collimated light, secondary light source 30 can send diverging light.
Second, Wedge shape light conduction board 10 refers to that the thickness of light guide plate is different, and edge is parallel to the direction of exiting surface 101, light guide plate
Bottom surface 102 be gradually reduced to the distance of exiting surface 101.Herein, when the bottom surface 102 of light guide plate to the distance of exiting surface 101 it is
When zero, i.e. the bottom surface 102 of light guide plate is adjacent with exiting surface 101, and now relative with side 103 side can be that a rib is (attached
Figure does not illustrates), when the bottom surface 102 of light guide plate is not zero to the distance of exiting surface 101, the most as Figure 1-Figure 5 with
Relative side, side 103 is a face.
3rd, owing to light guide plate is Wedge shape light conduction board 10, thus the angle of bottom surface 102 and side 103 is acute angle.At this base
On plinth, the size for bottom surface 102 with the angle of side 103 is not defined.
The embodiment of the present invention provides a kind of backlight, and backlight includes the first light source 20 and secondary light source 30, if the first light
Source 20 is opened, and secondary light source 30 is closed, the just collimated light sent due to the first light source 20, thus, the first light source 20 sends
After light injects Wedge shape light conduction board 10, narrower from the angle of the light of exiting surface 101 outgoing of Wedge shape light conduction board 10, when by this backlight
When source is applied to display device, the most i.e. can realize narrow visual angle and show；If secondary light source 30 is opened, (the first light source 20 can be beaten
Open, it is also possible to close), the just diverging light sent due to secondary light source 30, thus go out through the exiting surface 101 of Wedge shape light conduction board 10
The angle of the light penetrated is relatively big, the most i.e. can realize wide viewing angle and show.
Preferably, secondary light source 30 is arranged on the outside of bottom surface 102 of Wedge shape light conduction board 10；Or, secondary light source 30 is same
Time be arranged on the outside of side 103 and the outside of bottom surface 102 of Wedge shape light conduction board 10；Or, secondary light source 30 is simultaneously located at
The outside of the side 103 of Wedge shape light conduction board 10 and the side relative with side 103.
If during it should be noted that secondary light source 30 is positioned only at the outside of side 103 of Wedge shape light conduction board 10, the second light
After the diverging light that source 30 sends injects Wedge shape light conduction board 10, propagate in Wedge shape light conduction board 10, through the end of Wedge shape light conduction board 10
After the refraction of face 102 and exiting surface 101, meeting is from exiting surface 101 outgoing, and in the light that secondary light source 30 sends, only small part can
Can travel to the Wedge shape light conduction board 10 position away from secondary light source 30, and from exiting surface 101 outgoing, the most just cause wedge shape
The exiting surface 101 of light guide plate 10 is more weak away from the brightness of the light of the position of secondary light source 30, the therefore embodiment of the present invention, preferably when
When secondary light source 30 is arranged on the outside of side 103 of Wedge shape light conduction board 10, in the outside of the bottom surface 102 of Wedge shape light conduction board 10
And/or the side relative with side 103 is also provided with secondary light source 30, the most just the outside of the first side 103 can be arranged
Secondary light source 30 compensates, so that the brightness uniformity of the light from exiting surface 101 outgoing of Wedge shape light conduction board 10.
In like manner, when secondary light source 30 is arranged on relative with side 103 side of Wedge shape light conduction board 10, it is also possible at wedge
The outside of the side 103 of shape light guide plate 10 and/or the outside of bottom surface 102 arrange secondary light source 30, with to relative with side 103
The secondary light source 30 that side is arranged compensates, so that the brightness uniformity of the light from exiting surface 101 outgoing of Wedge shape light conduction board 10.
During owing to being arranged on the outside of the bottom surface 102 of Wedge shape light conduction board 10 when secondary light source 30, secondary light source 30 sends
Light can inject the optional position of the exiting surface 101 of Wedge shape light conduction board 10, thus can be only in the bottom surface 102 of Wedge shape light conduction board 10
Outside secondary light source 30 is set.
In the embodiment of the present invention, secondary light source 30 is arranged on the outside of the bottom surface 102 of Wedge shape light conduction board 10；Or, the
Two light sources 30 are simultaneously located at outside and the outside of bottom surface 102 of the side 103 of Wedge shape light conduction board 10；Or, secondary light source 30
It is simultaneously located at the outside of the side 103 of Wedge shape light conduction board 10 and the side relative with side 103, this ensure that from wedge
The uniformity of the light of exiting surface 101 outgoing of shape light guide plate 10.
Preferably, as it is shown in figure 1, the bottom surface 102 of Wedge shape light conduction board 10 is tabular surface, bottom surface 102 and the angle of side 103
For α, θ ＜ α ＜ 90 °；Wherein, θ is the critical angle that Wedge shape light conduction board 10 occurs total reflection.
The embodiment of the present invention, when meeting θ ＜ α ＜ 90 ° due to the angle α of bottom surface 102 with side 103, then from the first light source
After 10 collimated lights sent inject bottom surface 102, just can all be reflected towards the exiting surface 101 of Wedge shape light conduction board 10, without rolling over
Injection bottom surface 102, thus the utilization rate of light source can be improved.
It is further preferred that as in figure 2 it is shown, the angle of bottom surface 102 and side 103 is 45 °.
Wherein, when the bottom surface 102 of Wedge shape light conduction board 10 is 45 ° with the angle of side 103, when the standard that the first light source 20 sends
After direct light injects bottom surface 102, exiting surface 101 can be reflected towards by bottom surface 102, thus be perpendicular to exiting surface 101 outgoing.
The embodiment of the present invention, when the bottom surface 102 of Wedge shape light conduction board 10 is 45 ° with the angle of side 103, from the first light source
20 light sent will be perpendicular to exiting surface 101 outgoing, on the one hand, can make exiting surface 101 outgoing from Wedge shape light conduction board 10
The angle of light the narrowest；On the other hand, the light owing to sending from the first light source 20 is perpendicular to exiting surface 101 outgoing, will not roll over
Directive a direction, so can make the light on the exiting surface 101 of Wedge shape light conduction board 10 be evenly distributed.
Preferably, as it is shown on figure 3, bottom surface 102 includes the first plane 1021 and the second plane 1022；First plane 1021 phase
The most parallel, and the first plane 1021 connected by the second plane 1022；First plane 1021 is β, θ ＜ β with the angle of side 103
＜ 90 °；Wherein, θ is the critical angle that Wedge shape light conduction board 10 occurs total reflection.
Wherein, the spacing between width d and adjacent first plane 1021 of the first plane 1021 is not defined.The
The width d of one plane 1021 can be identical, it is also possible to different, the spacing between adjacent first plane 1021 can be identical, it is possible to
With difference.Additionally, the spacing between the width d of the first plane 1021 and adjacent first plane 1021 can carry out phase as required
Should adjust.
, for the second plane 1022, can be parallel to each other, it is also possible to not parallel, as long as the second plane can be passed through herein
First plane 1021 is connected by 1022.On this basis, the first plane 1021 and the second plane 1022 can be one-body molded.
It should be noted that as it is shown in figure 1, the bottom surface 102 of Wedge shape light conduction board 10 is tabular surface, then the width of exiting surface 101
Spend relevant with the width of the width of the 102 of bottom surface and side 103.If the width of side 103 is h, then the width etc. of exiting surface 101
In (side relative with side 103 is a rib) or be approximately equal to (side 103 relative side be a face) tan α × h.
And in order to reduce the thickness of display device, the thickness of backlight is general the least, i.e. the width h of side 103 is less, thus causes
The width of exiting surface 101 is less, thus the preferred bottom surface of the embodiment of the present invention 102 includes the first plane 1021 and the second plane
1022。
The embodiment of the present invention, owing to the angle β of the first plane 1021 with side 103 meets θ ＜ β ＜ 90 °, then from the first light
After the collimated light that source 10 sends injects the first plane 1021, just can all be reflected towards the exiting surface 101 of Wedge shape light conduction board 10, and
Bottom surface 102 will not be reflected, thus the utilization rate of light source can be improved.On this basis, bottom surface 102 includes the first plane 1021
Connected by the second plane 1022 with between the second plane 1022, and the first plane 1021, so so that Wedge shape light conduction board
The width of the exiting surface 101 of 10 increases, so that Wedge shape light conduction board 10 can be suitably used for various sizes of display device.
It is further preferred that the angle of the first plane 1021 and side 103 is 45 °.
The embodiment of the present invention, when the angle of the first plane 1021 with side 103 is 45 °, sends from the first light source 20
Exiting surface 101 outgoing will be perpendicular to after light directive the first plane 1021, so on the one hand, can make from Wedge shape light conduction board 10
The angle of the light of exiting surface 101 outgoing is the narrowest；On the other hand, the light owing to sending from the first light source 20 is perpendicular to exiting surface
101 outgoing, will not reflect to a direction, and the light on the exiting surface 101 of Wedge shape light conduction board 10 so can be made to be evenly distributed.
Preferably, as shown in Figure 4, the first light source 20 includes a multiple LED (Light Emitting Diode, luminescence
Diode) lamp 201 and collimating lens 202；Collimating lens 202 is arranged on the light emission side of the first LED 201, and the first LED
201 light sent collimated lens 202 outgoing.
Wherein, the number of the first LED 201 included for the first light source 20 is not defined, can be as required
Brightness arrange accordingly.
It should be noted that the first LED 201 can be arranged on pcb board (Printed Circuit as shown in Figure 4
Board, printed circuit board (PCB)) on plate 203.First LED 201 arrangement mode on pcb board 203 is not defined, the
One LED 201 can uniformly be arranged, it is also possible to non-homogeneous arrangement.In order to when carrying out the display of narrow visual angle, from Wedge shape light conduction board 10
Exiting surface 101 outgoing just uniform, thus the embodiment of the present invention the preferably first LED 201 is uniformly arranged.
Herein, owing to being both provided with collimating lens 202 in the light emission side of each first LED 201, such that it is able to guarantee from
The light that first LED 201 sends is after collimating lens 202, and the light of outgoing is all collimated light.
Owing to LED is low in energy consumption, life-span length and the suitability are good, thus the embodiment of the present invention the first light source 20 preferably includes many
Individual first LED 201, on this basis, owing to the first light source 20 also includes collimating lens 202, thus may insure that from first
The light that LED 201 sends is after collimating lens 202, and the light of outgoing is all collimated light.
Preferably, as shown in Fig. 5 (a) and Fig. 5 (b), secondary light source 30 includes multiple second LED 204；At secondary light source
In the case of 30 outsides of side 103 being arranged on Wedge shape light conduction board 10, between adjacent two the second LED 204 at least provided with
One the first LED 201.
Wherein, when secondary light source 30 is arranged on the outside of the side 103 of Wedge shape light conduction board 10, and secondary light source 30 includes many
During individual second LED 204, the second LED 204 and the first LED 201 can be integrated on same pcb board 203.When second
When LED 204 is arranged on the outside of the bottom surface 102 of Wedge shape light conduction board 10 or the side relative with side 103, the second LED 204
Can also be arranged on pcb board 203.
Herein, first LED 201 can be set between adjacent two the second LED 204, naturally it is also possible to
Between adjacent two the second LED 204, two or more first LED 201 is set.Owing to being arranged on wedge shape when secondary light source 30
During the outside of the side 103 of light guide plate 10, if secondary light source 30 is additionally arranged at relative with side 103 of Wedge shape light conduction board 10
Side and/or be arranged on the outside of bottom surface 102 of Wedge shape light conduction board 10, in order to make backlight show and wide viewing angle carrying out narrow visual angle
The brightness provided during display is identical, thus is arranged on the individual of first LED 201 in the outside of the side 103 of Wedge shape light conduction board 10
Number is more than the number of the second LED 204.
When above-mentioned backlight be applied to display device carry out narrow visual angle show or wide viewing angle display time, the number of LED with
Brightness during display device display is directly proportional.Example, at the LED that the outside of the side 103 of Wedge shape light conduction board 10 is arranged
The number of lamp 201 is M, and the number of the second LED 204 is N.When carrying out the display of narrow visual angle, open the first LED 201, entering
During the display of line width visual angle, open the first LED and the second LED 204.If M=N, then carry out the brightness phase during display of narrow visual angle
Luminance-reduction half when wide viewing angle is shown；If 2M=N, then when the relatively wide visual angle of brightness when carrying out the display of narrow visual angle shows
Luminance-reduction 1/3rd.
Based on above-mentioned, for the first LED 201 and setting of the second LED 204 of the side 103 of Wedge shape light conduction board 10
Mode is not defined, and can uniformly arrange, it is also possible to non-homogeneous arrangement.Wherein, the first LED 201 and the second LED 204
Arrangement mode relevant with the concrete structure of the bottom surface 102 of Wedge shape light conduction board 10, can be to the first LED 201 and the second LED
The structure of the arrangement mode of 204 or the bottom surface 102 of Wedge shape light conduction board 10 is adjusted, as long as can ensure that from Wedge shape light conduction board 10
Exiting surface 101 outgoing the most uniformly.
When the second LED 204 is arranged on the outside of side 103 of Wedge shape light conduction board 10, in order to avoid Wedge shape light conduction board
The exiting surface 101 of 10 is more weak away from the brightness of the position light of the second LED 204, thus preferably as shown in Fig. 5 (a), second
LED 204 is additionally arranged at the side relative with side 103 of Wedge shape light conduction board 10 or as shown in Fig. 5 (b), the second LED 204
It is additionally arranged at the outside of the bottom surface 102 of Wedge shape light conduction board 10；Can certainly be as shown in Fig. 5 (c), the second LED 204 be simultaneously
It is arranged on the side relative with side 103 and the outside of bottom surface 102 of Wedge shape light conduction board 10, so that Wedge shape light conduction board 10 gone out light
Face 101 compensates away from the brightness of the light of the position of the second LED 204.
The embodiment of the present invention is at least provided with first LED 201 between adjacent two the second LED 204, permissible
Guarantee that the first LED 201 and the second LED 204 are uniformly arranged, it is to avoid the first LED 201 is close to setting or second
LED 204 be close to arrange cause carry out narrow visual angle show or wide viewing angle display time, from the exiting surface of Wedge shape light conduction board 10
The brightness irregularities of the light of 101 outgoing.
Preferably, as shown in Fig. 5 (a), Fig. 5 (b) and Fig. 5 (c), it is arranged on outside the side 103 of Wedge shape light conduction board 10
Spacing between two LED of the arbitrary neighborhood of side is equal.
It should be noted that LED herein both can be the first LED, it is also possible to be the second LED.
In order to ensure when carrying out narrow visual angle and showing with wide viewing angle display, from exiting surface 101 outgoing of Wedge shape light conduction board 10
Light be all uniform, thus the embodiment of the present invention be preferably provided at side 103 outside arbitrary neighborhood two LED it
Between spacing equal.
It is further preferred that as shown in Fig. 5 (b), secondary light source 30 is arranged on the outside of the bottom surface 102 of Wedge shape light conduction board 10
And the outside of side 103；Wherein, second LED 204 in outside of the bottom surface 102 of Wedge shape light conduction board 10 it is arranged near side
The density in face 103 is less than the density away from side 103.
Wherein, for how arranging the second LED 204 in the outside of the bottom surface 102 of Wedge shape light conduction board 10 it is not defined,
Specifically can carry out relative set according to the structure of the bottom surface 102 of Wedge shape light conduction board 10, as long as can ensure that from Wedge shape light conduction board 10
Bottom surface 102 outgoing the most uniformly.
Herein, it is arranged on the outside of the side 103 of Wedge shape light conduction board 10 due to the first LED 201, and when by the 2nd LED
When lamp 204 is also disposed at the outside of side 103 of Wedge shape light conduction board 10, the first LED 201 and the second LED 204 can be integrated
On same pcb board 203, it is simple to make, thus relatively the second LED 204 is arranged the side relative with side 103, this
Second LED 204 is preferably arranged on the outside of side 103 by bright embodiment.
Based on above-mentioned, secondary light source 30 is arranged on outside outside and the side 103 of the bottom surface 102 of Wedge shape light conduction board 10
Side, it can be ensured that uniform from the light of exiting surface 101 outgoing of Wedge shape light conduction board 10.On this basis, owing to carrying out wide viewing angle
During display, the Wedge shape light conduction board 10 brightness near the position of side 103 is relatively big, and therefore the embodiment of the present invention is by being arranged on wedge shape
Second LED 204 in the outside of the bottom surface 102 of light guide plate 10 density near side 103 is less than the density away from side 103,
Just the most uniform of exiting surface 101 outgoing from Wedge shape light conduction board 10 can be made further.
The embodiment of the present invention provides a kind of display device, as shown in Figure 6, including backlight 01 and display floater 02, backlight
Source 01 is above-mentioned backlight.
Wherein, display floater 02 includes array base palte and to box substrate, and array base palte includes thin film transistor (TFT) and pixel electricity
Pole.
The embodiment of the present invention provides a kind of display device, owing to the backlight 01 of display device includes the first light source 20 and the
Two light sources 30, if the first light source 20 is opened, secondary light source 30 is closed, the just collimated light sent due to the first light source 20, thus,
After the light that first light source 20 sends injects Wedge shape light conduction board 10, from the angle of the light of exiting surface 101 outgoing of Wedge shape light conduction board 10
Spend narrower, when this backlight is applied to display device, the most i.e. can realize narrow visual angle and show；If secondary light source 30 is opened
Time (the first light source 20 can be opened, it is also possible to closes), the just diverging light sent due to secondary light source 30, thus lead through wedge shape
The angle of the light of exiting surface 101 outgoing of tabula rasa 10 is relatively big, the most i.e. can realize wide viewing angle and show.This display device is permissible
According to switching to narrow visual angle to show for demand or wide viewing angle shows.
Preferably, as it is shown in fig. 7, above-mentioned display device also includes controller 40；Controller 40 and the first light source 10 and
Two light sources 20 are all connected with, for controlling the first light source 10 and the opening and closing of secondary light source 20.
Wherein, controller 40 can control the first light source 10 and the opening and closing of secondary light source 20 according to user's request.
It should be noted that when carrying out wide viewing angle display, the first light source 10 can be opened, it is also possible to close.When by
When one light source 10 is opened, so that display device carries out the brightness increase that wide viewing angle shows.
The embodiment of the present invention, opens when controller 40 controls the first light source 10, when secondary light source 20 is closed, now can enter
During the display of row narrow visual angle；Opening when controller 40 controls secondary light source 20, the first light source 10 opens or closes, and now can carry out
Wide viewing angle shows.
The present invention implements to also provide for the control method of a kind of above-mentioned display device, as shown in Figure 8, and including:
S100, controlling the first light source 10 and open, secondary light source 20 is closed, and shows carrying out narrow visual angle.
Wherein, the first light source 20 and secondary light source 30 are not defined, as long as the first light source 20 can send collimated light,
Secondary light source 30 can send diverging light.
Herein, the position that arranges for secondary light source 30 is not defined, and it is guide-lighting that secondary light source 30 can be arranged on wedge shape
The outside of the bottom surface 103 of plate 10；And/or, secondary light source 30 is arranged on the outside of the side 103 of Wedge shape light conduction board 10；And/or,
Secondary light source 30 is arranged on the side relative with side 103 of Wedge shape light conduction board 10.
Based on above-mentioned, just uniform in order to ensure send from the exiting surface 101 of Wedge shape light conduction board 10, thus the present invention
The preferred secondary light source of embodiment 30 is arranged on the outside of the bottom surface 102 of Wedge shape light conduction board 10；Or, secondary light source 30 is arranged simultaneously
Outside and the outside of bottom surface 102 in the side 103 of Wedge shape light conduction board 10；Or, secondary light source 30 is simultaneously located at wedge shape and leads
The outside of the side 103 of tabula rasa 10 and the side relative with side 103.
S101, control secondary light source 20 and open, show carrying out wide viewing angle.
Herein, it should be noted that when carrying out wide viewing angle display, secondary light source 20 is opened, and the first light source 10 can be beaten
Open, it is also possible to close.When the first light source 10 and secondary light source 20 are all opened, the brightness that backlight provides is bigger.
The embodiment of the present invention provides the control method of a kind of display device, owing to the backlight 01 of display device includes first
Light source 20 and secondary light source 30, if the first light source 20 is opened, secondary light source 30 is closed, the just standard sent due to the first light source 20
Direct light, thus, after the light that the first light source 20 sends injects Wedge shape light conduction board 10, from exiting surface 101 outgoing of Wedge shape light conduction board 10
The angle of light narrower, when this backlight is applied to display device, the most i.e. can realize narrow visual angle and show；If second
When light source 30 opens (the first light source 20 can be opened, it is also possible to closes), the just diverging light sent due to secondary light source 30, because of
And relatively big through the angle of the light of exiting surface 101 outgoing of Wedge shape light conduction board 10, the most i.e. can realize wide viewing angle and show.This shows
Showing device can be according to switching to narrow visual angle to show for demand or wide viewing angle shows.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (13)
1. a backlight, it is characterised in that include Wedge shape light conduction board, described Wedge shape light conduction board include exiting surface with described go out
The bottom surface that bright finish is relative, and side, described side be shaped as rectangle；
Also include the first light source and secondary light source；
Described first light source is arranged on the outside of the described side of described Wedge shape light conduction board, is used for sending collimated light；
Described secondary light source is arranged on the outside of the described bottom surface of described Wedge shape light conduction board；And/or, described secondary light source is arranged on
The outside of the described side of described Wedge shape light conduction board；And/or, described secondary light source be arranged on described Wedge shape light conduction board with described
The side that side is relative；Described secondary light source is used for sending diverging light.
Backlight the most according to claim 1, it is characterised in that described secondary light source is arranged on described Wedge shape light conduction board
The outside of described bottom surface；Or, described secondary light source is simultaneously located at outside and the institute of the described side of described Wedge shape light conduction board
State the outside of bottom surface；Or, described secondary light source be simultaneously located at the described side of described Wedge shape light conduction board outside and with institute
State the side that side is relative.
Backlight the most according to claim 1, it is characterised in that the described bottom surface of described Wedge shape light conduction board is tabular surface,
Described bottom surface is α, θ ＜ α ＜ 90 ° with the angle of described side；
Wherein, θ is the critical angle that described Wedge shape light conduction board occurs total reflection.
Backlight the most according to claim 3, it is characterised in that described bottom surface is 45 ° with the angle of described side.
Backlight the most according to claim 1, it is characterised in that described bottom surface includes the first plane and the second plane；
Described first plane is parallel to each other, and described first plane is connected by described second plane；Described first plane and institute
The angle stating side is β, θ ＜ β ＜ 90 °；
Wherein, θ is the critical angle that described Wedge shape light conduction board occurs total reflection.
Backlight the most according to claim 5, it is characterised in that described first plane is 45 ° with the angle of described side.
Backlight the most according to claim 1, it is characterised in that described first light source includes multiple first LED and standard
Straight lens；
Described collimating lens is arranged on the light emission side of described first LED, and the light that described first LED sends is through described collimation
Lens outgoing.
Backlight the most according to claim 7, it is characterised in that described secondary light source includes multiple second LED；
In the case of described secondary light source is arranged on the outside of described side of described Wedge shape light conduction board, adjacent two second
At least provided with first LED between LED.
Backlight the most according to claim 8, it is characterised in that be arranged on outside the described side of described Wedge shape light conduction board
Spacing between two LED of the arbitrary neighborhood of side is equal.
Backlight the most according to claim 8, it is characterised in that described secondary light source is arranged on described Wedge shape light conduction board
The outside of described bottom surface and the outside of described side；
Wherein, close near described side of described second LED in outside of the described bottom surface of described Wedge shape light conduction board it is arranged on
Degree is less than the density away from described side.
11. 1 kinds of display devices, including backlight and display floater, it is characterised in that described backlight is claim 1-10
Backlight described in any one.
12. display devices according to claim 11, it is characterised in that also include controller；
Described controller and the first light source and secondary light source are all connected with, for controlling described first light source and described secondary light source
Open and close.
The control method of 13. 1 kinds of display devices as described in any one of claim 11-12, it is characterised in that including:
Controlling the first light source to open, secondary light source is closed, and shows carrying out narrow visual angle；
Control described secondary light source to open, show carrying out wide viewing angle.
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| CN201610548201.4A CN106195766B (en) | 2016-07-12 | 2016-07-12 | Backlight source, display device and control method thereof |
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|---|---|---|---|
| CN201610548201.4A CN106195766B (en) | 2016-07-12 | 2016-07-12 | Backlight source, display device and control method thereof |
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| CN109765723A (en) * | 2019-03-12 | 2019-05-17 | 京东方科技集团股份有限公司 | A kind of light source assembly, side-edge type backlight mould group and display device |
| CN110966574A (en) * | 2019-11-28 | 2020-04-07 | 奥普家居股份有限公司 | Directional lighting system and lighting system with coexistence of directional lighting and floodlighting |
| CN111781769A (en) * | 2019-04-03 | 2020-10-16 | 京东方科技集团股份有限公司 | Backlight assembly and liquid crystal display device |
| US11054701B1 (en) | 2020-02-18 | 2021-07-06 | Sioptica Gmbh | Illumination device for a screen for a free and a restricted viewing mode |
| DE102020002323B3 (en) | 2020-04-07 | 2021-07-22 | Sioptica Gmbh | Optical element for influencing the directions of light and screen with such an optical element |
| CN113539059A (en) * | 2020-04-20 | 2021-10-22 | 华为技术有限公司 | Display screen and electronic equipment |
| DE102020004094B3 (en) | 2020-07-03 | 2021-12-09 | Sioptica Gmbh | Lighting device for a screen, screen and use of a lighting device or screen |
| DE102020003830A1 (en) | 2020-06-23 | 2021-12-23 | Sioptica Gmbh | Lighting device for a screen |
| DE102021110010A1 (en) | 2021-04-20 | 2022-10-20 | Sioptica Gmbh | Optical element for influencing light directions, arrangement for lighting and screen using said optical element with one or two operating modes |
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| DE102021110010A1 (en) | 2021-04-20 | 2022-10-20 | Sioptica Gmbh | Optical element for influencing light directions, arrangement for lighting and screen using said optical element with one or two operating modes |
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