CN104933995A - Novel backlight and driving method thereof, and display apparatus - Google Patents
Novel backlight and driving method thereof, and display apparatus Download PDFInfo
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- CN104933995A CN104933995A CN201510420361.6A CN201510420361A CN104933995A CN 104933995 A CN104933995 A CN 104933995A CN 201510420361 A CN201510420361 A CN 201510420361A CN 104933995 A CN104933995 A CN 104933995A
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Abstract
An embodiment of the present invention provides a novel backlight and a driving method thereof, and a display apparatus, relating to the technical field of display and capable of improving light conversion efficiency of the backlight. The novel backlight comprises a rotation mechanism and a circular backlight substrate arranged on the rotation mechanism, wherein at least one fan-shaped OLED light bar is arranged in the backlight substrate along a circumferential direction; the radius of the fan-shaped OLED light bar is the radius of the backlight substrate; and when the rotation mechanism rotates, the fan-shaped OLED light bar is driven to rotate around the circle center of the backlight substrate. The novel backlight can be applied in the display apparatus.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of Novel backlight and driving method, display device.
Background technology
Backlight is one of key part and component of panel of LCD, for being the well-off brightness of panel of LCD and the light source be evenly distributed, makes the normal show image of panel of LCD energy.
At present, as shown in Figure 1, with straight-down negative LED (Light Emitting Diode, light emitting diode) backlight is example, it is assembled by fixed frame 06 primarily of light source 01 (such as LED module), light guide plate 02, blooming piece 03, anti-dazzling screen 04 and reflector plate 05.But the multilayer optical device such as blooming piece 03, anti-dazzling screen 04 and reflector plate 05 can have a strong impact on the light conversion efficiency of backlight, cause its light conversion efficiency generally lower than 50%.
Summary of the invention
Embodiments of the invention provide a kind of Novel backlight and driving method, display device, can improve the light conversion efficiency of backlight.
For achieving the above object, embodiments of the invention adopt following technical scheme:
On the one hand, embodiments of the invention provide a kind of Novel backlight, comprising: rotating mechanism, and are arranged at the circular backlight substrate on described rotating mechanism,
In described backlight substrate, be along the circumferential direction provided with at least one fan-shaped OLED lamp bar; The radius of described fan-shaped OLED lamp bar is the radius of described backlight substrate;
When described rotating mechanism dress rotates, drive described fan-shaped OLED lamp bar with the center of circle of described backlight substrate for axis rotation, the rotational frequency of described fan-shaped OLED lamp bar is greater than 8 hertz.
Further, the rotational frequency of described fan-shaped OLED lamp bar is greater than 8 hertz.
Further, if be provided with at least two described fan-shaped OLED lamp bars, then described fan-shaped OLED lamp bar is evenly arranged on described backlight substrate.
Further, described backlight substrate is provided with three fan-shaped OLED lamp bars, wherein, described three fan-shaped OLED lamp bars are mutually hexagonal angle and arrange.
Further, between described fan-shaped OLED lamp bar for being connected in parallel.
Further, described fan-shaped OLED lamp bar comprises the OLED anode and OLED negative electrode that are oppositely arranged, and between described OLED anode and described OLED negative electrode, the hole transmission layer arranged near described OLED anode and the electron transfer layer arranged near described OLED anode;
Wherein, between described hole transmission layer and described electron transfer layer, organic luminous layer is provided with.
Further, described rotating mechanism is fan, and described fan and described backlight substrate are coaxially arranged.
Further, the material of described fan is aluminium alloy.
Embodiments of the invention provide a kind of display device, comprise display panel, and above-mentioned any one Novel backlight.
Further, the backlight substrate of described Novel backlight is provided with described display panel, and the diameter of described backlight substrate is greater than cornerwise length the longest in described display panel.
Embodiments of the invention provide a kind of driving method of Novel backlight, are applied to above-mentioned any one Novel backlight, comprise:
Rotating mechanism to described Novel backlight inputs the first control signal, and drive the fan-shaped OLED lamp bar of described Novel backlight to rotate to control described rotating mechanism, the rotational frequency of described fan-shaped OLED lamp bar is greater than 8 hertz;
The second control signal is inputted, to control the light on and off of described fan-shaped OLED lamp bar to described fan-shaped OLED lamp bar.
Embodiments of the invention provide a kind of Novel backlight and driving method, display device, this Novel backlight comprises: rotating mechanism, and is arranged at the circular backlight substrate on this rotating mechanism, wherein, in this backlight substrate, be along the circumferential direction provided with at least one fan-shaped OLED lamp bar, the radius of this fan-shaped OLED lamp bar is the radius of this backlight substrate, so, because the organic luminous layer in OLED can be luminous under the effect of certain electric current, therefore, when rotating mechanism dress rotates, drive fan-shaped OLED lamp bar with the center of circle of backlight substrate for axis rotation, now, due to the visual persistence effect of human eye, observer can be seen, and whole backlight substrate is luminous, and then realize backlight effect, can find out, the light that this Novel backlight sends is without the need to through blooming piece, the multilayer optical device such as anti-dazzling screen and reflector plate, therefore, the utilization factor of light can significantly improve, and then improve the light conversion efficiency of backlight.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of backlight in prior art;
The structural representation of a kind of Novel backlight that Fig. 2 provides for embodiments of the invention;
The structural representation of the fan-shaped OLED lamp bar that Fig. 3 provides for embodiments of the invention;
The structural representation of the display device that Fig. 4 provides for embodiments of the invention;
The schematic flow sheet of the driving method of a kind of Novel backlight that Fig. 5 provides for embodiments of the invention;
The schematic diagram of the first control signal that Fig. 6 provides for embodiments of the invention and the second control signal.
Embodiment
In below describing, in order to illustrate instead of in order to limit, propose the detail of such as particular system structure, interface, technology and so on, thoroughly to understand the present invention.But, it will be clear to one skilled in the art that and also can realize the present invention in other embodiment not having these details.In other situation, omit the detailed description to well-known device, circuit and method, in order to avoid unnecessary details hinders description of the invention.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
Embodiments of the invention provide a kind of Novel backlight, as shown in Figure 2, comprising: rotating mechanism (not shown), and are arranged at the circular backlight substrate 11 on this rotating mechanism.
Concrete, in backlight substrate 11, be along the circumferential direction provided with at least one fan-shaped OLED lamp bar 12; The radius of this fan-shaped OLED lamp bar 12 is the radius of backlight substrate 11.
So, when rotating this mechanism dress and rotating, 12, fan-shaped OLED lamp can be driven with the center of circle O of backlight substrate 11 for rotating in axle center.
Now, because the organic luminous layer in OLED can be luminous under the effect of certain electric current, and the visual persistence phenomenon (the usual retentivity time of eye is about 0.05 to 0.2 second) that human eye exists, under the quick rotation of fan-shaped OLED lamp bar 12, observer can be seen, and whole backlight substrate 11 is luminous, and then realize backlight effect, can find out, the light that this Novel backlight sends is without the need to through multilayer optical device such as blooming piece, anti-dazzling screen and reflector plates, therefore, the utilization factor of light can significantly improve, and then improves the light conversion efficiency of backlight.
Preferably, for ensureing that observer sees that whole backlight substrate 11 is luminous, the rotational frequency that can arrange this fan-shaped OLED lamp bar 12 is greater than 8 hertz.
Wherein, when rotating speed one timing of fan-shaped OLED lamp bar 12, away from the some A on the fan-shaped OLED lamp bar 12 at O place, the center of circle, compared with the some B on the fan-shaped OLED lamp bar 12 at O place, the center of circle, their angular velocity omega is identical, but linear velocity V difference (i.e. V=ω r), that is, V
a/ V
b=r (r is the radius of backlight substrate 11), so, the ratio of the area that A, B 2 is inswept within the unit interval is r
2, and the luminescence efficiency of each position of fan-shaped OLED lamp bar 12 itself is identical, therefore, wants to realize backlight substrate 11 brightness uniformity, just needs the light-emitting area away from the some A of circle centre position to be the r of the some B light-emitting area near circle centre position
2times, and the geometric properties of sector structure meets this kind of relation, so the lamp bar on backlight substrate 11 is designed to fan-shaped.
Further, when backlight substrate 11 being provided with multiple fan-shaped OLED lamp bar 12, in order to improve further on backlight substrate 11 after rotation, the homogeneity of fan-shaped OLED lamp bar 12 luminescence, evenly can be arranged on multiple fan-shaped OLED lamp bar 12 on backlight substrate 11.
Such as, as shown in Figure 2, backlight substrate 11 arranges three fan-shaped OLED lamp bars 12 respectively, wherein, these three fan-shaped OLED lamp bars 12 are mutually hexagonal angle and arrange.
Further, for being connected in parallel, like this, can be controlled the light on and off of multiple fan-shaped OLED lamp bar 12 by a control signal between multiple fan-shaped OLED lamp bar 12 simultaneously.
Concrete, as shown in Figure 3, for the concrete structure figure of this fan-shaped OLED lamp bar 12, this fan-shaped OLED lamp bar 12 comprises the OLED anode and OLED negative electrode that are oppositely arranged, and between OLED anode and OLED negative electrode, the hole transmission layer arranged near OLED anode and the electron transfer layer arranged near OLED negative electrode; Wherein, between hole transmission layer and electron transfer layer, be provided with organic luminous layer, after applying certain voltage to OLED anode and OLED negative electrode, between hole transmission layer and electron transfer layer, form suitable electric current, excite the organic material in organic luminous layer luminous.
Wherein, the concrete material of this OLED negative electrode can be ITO (tin indium oxide), and the concrete material of OLED anode can be conducting metal.
In addition, in the Novel backlight that the embodiment of the present invention provides, this rotating mechanism can be specially fan, and now, backlight substrate 11 coaxially can be arranged with fan, like this, backlight substrate 11 can be driven to rotate when fan turns, and the heat that backlight substrate 11 rotates rear generation can be derived in time by fan, radiating effect is better, can extend the serviceable life of Novel backlight.
Optionally, because the rotational frequency of the cpu fan in display device is greater than 8 hertz usually, therefore, this fan can be the cpu fan in display device, the backlight substrate 11 being provided with fan-shaped OLED lamp bar 12 is coaxially connected with cpu fan, like this, without the need to additionally increasing the power source making backlight substrate 11 rotate in display device, directly can utilize the cpu fan in display device, drive backlight substrate 11 to rotate.So, due to directly as backlight, without the need to using the multilayer optical device such as blooming piece, anti-dazzling screen and reflector plate, the thickness of backlight can be lowered further after backlight substrate 11 rotation.
Wherein, due to the lighter weight of aluminium alloy and intensity is better, this fan can be made by aluminium alloy material.
Further, embodiments of the invention provide a kind of display device, comprise display panel and any one Novel backlight above-mentioned.
Wherein, described display device can be: any product or parts with Presentation Function such as liquid crystal panel, Electronic Paper, oled panel, mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument.
Concrete, as shown in Figure 4, the backlight substrate 11 of Novel backlight arranges this display panel 21, and the diameter of this backlight substrate 11 is greater than cornerwise length the longest in display panel 21, such as, display panel 21 can be inscribed within backlight substrate 11, like this, backlight substrate 11 can cover display panel 21 after rotating completely, and then provides backlight for display panel 21.
Further, embodiments of the invention provide a kind of driving method of Novel backlight, can be applicable to the Novel backlight of above-mentioned any one, as shown in Figure 5, comprising:
101, the rotating mechanism to Novel backlight inputs the first control signal, and drive the fan-shaped OLED lamp bar of Novel backlight to rotate to control rotating mechanism, the rotational frequency of this fan-shaped OLED lamp bar is greater than 8 hertz.
102, the second control signal is inputted to this fan-shaped OLED lamp bar, to control the light on and off of fan-shaped OLED lamp bar.
Concrete, the subregion due to backlight substrate 11 is provided with fan-shaped OLED lamp bar 12, therefore, for realizing backlight effect, needing to input the first control signal to rotating mechanism, rotating mechanism is rotated, thus drives fan-shaped OLED lamp bar 12 on backlight substrate 11 to rotate.
Further, because fan-shaped OLED lamp bar 12 needs under certain voltage condition luminous, therefore, also need to input the second control signal to this fan-shaped OLED lamp bar 12, to control the light on and off of fan-shaped OLED lamp bar 12, so luminous and under the condition of rotating, realize backlight effect at fan-shaped OLED lamp bar 12.
Optionally, this first control signal and/or the second control signal are pulse width modulating signal, i.e. PWM (Pulse Width Modulation) signal.
Exemplary, based on the Novel backlight shown in Fig. 2, as shown in Figure 6, if high level is conducting state, low level is closed condition, this first control signal can be frequency size be PWM (Pulse Width Modulation) signal of 10 hertz, like this, by inputting this first control signal in t to the rotating mechanism of Novel backlight, rotating mechanism can be made to drive this fan-shaped OLED lamp bar to rotate with the frequency of 10 hertz.Simultaneously, still as shown in Figure 6, while this first control signal of input, the second control signal can also be inputted to fan-shaped OLED lamp bar, namely at t input high level signal, owing to being connected in parallel between each fan-shaped OLED lamp bar, therefore, the conducting after receiving this high level signal of each fan-shaped OLED lamp bar is also luminous, like this, under the quick rotation of fan-shaped OLED lamp bar, observer can be seen, and whole backlight substrate is luminous, and then realize backlight effect, can find out, the light that this Novel backlight sends is without the need to through blooming piece, the multilayer optical device such as anti-dazzling screen and reflector plate, therefore, the utilization factor of light can significantly improve, and then improve the light conversion efficiency of backlight.
It should be noted that, the enforcement order of embodiments of the invention to step 101 and step 102 does not impose any restrictions.
So far, embodiments of the invention provide a kind of Novel backlight and driving method, display device, this Novel backlight comprises: rotating mechanism, and the circular backlight substrate be arranged on this rotating mechanism, wherein, in this backlight substrate, be along the circumferential direction provided with at least one fan-shaped OLED lamp bar, the radius of this fan-shaped OLED lamp bar is the radius of this backlight substrate, so, because the organic luminous layer in OLED can be luminous under the effect of certain electric current, therefore, when rotating mechanism dress rotates, drive fan-shaped OLED lamp bar with the center of circle of backlight substrate for axis rotation, now, due to the visual persistence effect of human eye, observer can be seen, and whole backlight substrate is luminous, and then realize backlight effect, can find out, the light that this Novel backlight sends is without the need to through blooming piece, the multilayer optical device such as anti-dazzling screen and reflector plate, therefore, the utilization factor of light can significantly improve, and then improve the light conversion efficiency of backlight.
In the description of this instructions, specific features, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (12)
1. a Novel backlight, is characterized in that, comprising: rotating mechanism, and is arranged at the circular backlight substrate on described rotating mechanism,
In described backlight substrate, be along the circumferential direction provided with at least one fan-shaped OLED lamp bar; The radius of described fan-shaped OLED lamp bar is the radius of described backlight substrate;
When described rotating mechanism dress rotates, drive described fan-shaped OLED lamp bar with the center of circle of described backlight substrate for axis rotation.
2. Novel backlight according to claim 1, is characterized in that, the rotational frequency of described fan-shaped OLED lamp bar is greater than 8 hertz.
3. Novel backlight according to claim 2, is characterized in that, if be provided with at least two described fan-shaped OLED lamp bars, then described fan-shaped OLED lamp bar is evenly arranged on described backlight substrate.
4. Novel backlight according to claim 3, is characterized in that, described backlight substrate is provided with three fan-shaped OLED lamp bars, and wherein, described three fan-shaped OLED lamp bars are mutually hexagonal angle and arrange.
5. Novel backlight according to claim 3, is characterized in that, for being connected in parallel between described fan-shaped OLED lamp bar.
6. Novel backlight according to any one of claim 1 to 5, it is characterized in that, described fan-shaped OLED lamp bar comprises the OLED anode and OLED negative electrode that are oppositely arranged, and between described OLED anode and described OLED negative electrode, the hole transmission layer arranged near described OLED anode and the electron transfer layer arranged near described OLED anode;
Wherein, between described hole transmission layer and described electron transfer layer, organic luminous layer is provided with.
7. the Novel backlight according to any one of claim 1-5, is characterized in that, described rotating mechanism is fan, and the rotation axis of described fan is identical with the rotation axis of described backlight substrate.
8. Novel backlight according to claim 6, is characterized in that, the material of described fan is aluminium alloy.
9. a display device, is characterized in that, comprises display panel and the Novel backlight according to any one of claim 1-6.
10. display device according to claim 9, is characterized in that, the backlight substrate of described Novel backlight is provided with described display panel, and the diameter of described backlight substrate is greater than cornerwise length the longest in described display panel.
The driving method of 11. 1 kinds of Novel backlights, is applied to the Novel backlight according to any one of claim 1-8, it is characterized in that, comprising:
Rotating mechanism to described Novel backlight inputs the first control signal, and drive the fan-shaped OLED lamp bar of described Novel backlight to rotate to control described rotating mechanism, the rotational frequency of described fan-shaped OLED lamp bar is greater than 8 hertz;
The second control signal is inputted, to control the light on and off of described fan-shaped OLED lamp bar to described fan-shaped OLED lamp bar.
12. methods according to claim 11, is characterized in that, described first control signal and/or described second control signal are pulse width modulating signal.
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| CN201510420361.6A CN104933995A (en) | 2015-07-16 | 2015-07-16 | Novel backlight and driving method thereof, and display apparatus |
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| CN201510420361.6A CN104933995A (en) | 2015-07-16 | 2015-07-16 | Novel backlight and driving method thereof, and display apparatus |
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Application publication date: 20150923 |