CN102610200A - Backlight module and control method thereof and display device applying backlight module - Google Patents
Backlight module and control method thereof and display device applying backlight module Download PDFInfo
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- CN102610200A CN102610200A CN2012100949328A CN201210094932A CN102610200A CN 102610200 A CN102610200 A CN 102610200A CN 2012100949328 A CN2012100949328 A CN 2012100949328A CN 201210094932 A CN201210094932 A CN 201210094932A CN 102610200 A CN102610200 A CN 102610200A
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Abstract
The invention relates to a backlight module applied in a display device, which comprises first and second viewing angle light emitting diode clusters, first and second switches, a light emitting diode driving circuit that generates a driving current, and a mode control unit. The first and second switches enable or disenable the first and second viewing angle light emitting diode clusters respectively according first and second wave width modulation signals. The mode control unit switches the backlight module between a two-dimensional display mode and a three-dimensional display mode according to a mode control signal. Under the two-dimensional display mode, the first and second switches synchronously enable the first and second viewing angle light emitting diode clusters so as to emit light together according to the driving current. Under the three-dimensional display mode, the first and second switches alternately enable the first and second viewing angle light emitting diode clusters, so that one of the first and second viewing angle light emitting diode clusters emits light according to the driving current.
Description
Technical field
The invention relates to a kind of display technique, and particularly relevant for a kind of backlight module and control method thereof of display device.
Background technology
Stereo display technique can be realized the imagination of human powerful and unconstrained style, to reach the effect of being personally on the scene.With regard to using outward appearance, stereo display technique can roughly be distinguished into hyperphoria with fixed eyeballs mirror (stereoscopic) and bore hole formula (auto-stereoscopic).The principle of work of hyperphoria with fixed eyeballs mirror stereo display mainly is the right and left eyes picture that utilizes display to see off to have special message, via the selection of wear-type glasses, lets right and left eyes see the right and left eyes picture respectively, to form stereoscopic vision.Yet the inconvenience of wearing glasses and uncomfortable makes the stereo display of hyperphoria with fixed eyeballs mirror fail to popularize.Therefore, autostereoscopic display develops and becomes new trend gradually.
According to the technology of the paired stereopsis formula in the autostereoscopic display, can be divided into spatial multiplexing formula and time multitask type.Wherein the time multitask type utilizes backlight as beam split mechanism, the backlight that sees through the tool directivity with the right and left eyes picture alternately and be sent to right and left eyes respectively, to reach the stereo display effect.Because of being sees through directional backlight, so be called directive property three-dimensional display backlight again.The framework backlight of directive property three-dimensional display backlight has the grating of discrete type so that the light source of different directions to be provided; Yet have at the same time in the display of two dimension and 3-D display pattern; Backlight module usually can't be kept identical brightness under the switching of different mode, and often causes user's discomfort.As under the 3-D display pattern, to drive different backlights respectively in the known techniques, then need complicated control hardware to coordinate by independent driving circuit.And, in above-mentioned framework, when under two dimensional mode, starting different driving circuits simultaneously, moment starting current also bigger.
Therefore, how designing the backlight module and the control method thereof of a new display device, to overcome above-mentioned disappearance, is an industry problem demanding prompt solution for this reason.
Summary of the invention
Therefore; An aspect of the present invention is that a kind of backlight module is being provided; Be applied in the display device, backlight module comprises: the first visual angle light emitting diode string, the second visual angle light emitting diode string, first switch, second switch, LED driving circuit and pattern control module.First switch is according to the first Wave-wide regulation controlled electric signal activation or press down the ability first visual angle light emitting diode string.Second switch is according to the second Wave-wide regulation controlled electric signal activation or press down the ability second visual angle light emitting diode string.LED driving circuit is in order to produce drive current.The pattern control module switches backlight module between two dimensional mode and 3-D display pattern, to produce the first Wave-wide regulation controlled electric signal and the second Wave-wide regulation controlled electric signal according to the pattern controlling signal.Wherein work as the pattern control module and switch backlight module under two dimensional mode according to the pattern controlling signal; The first Wave-wide regulation controlled electric signal and the second Wave-wide regulation controlled electric signal make first switch and the synchronous activation first visual angle light emitting diode string of second switch and the second visual angle light emitting diode string, so that the first visual angle light emitting diode string and the second visual angle light emitting diode string are luminous according to drive current jointly.When the pattern control module switches backlight module under the 3-D display pattern according to the pattern controlling signal; The first Wave-wide regulation controlled electric signal and the second Wave-wide regulation controlled electric signal make the staggered activation first visual angle light emitting diode string of first switch and second switch and the second visual angle light emitting diode string so that the first visual angle light emitting diode string or the second visual angle light emitting diode string one of them is luminous according to drive current.
According to one embodiment of the invention, wherein LED driving circuit is the single channel driving circuit, and first switch and second switch independently are arranged at outside the LED driving circuit.
According to another embodiment of the present invention, wherein first switch and the first visual angle light emitting diode string are in series, and the second switch and the second visual angle light emitting diode string are in series.
According to further embodiment of this invention, wherein LED driving circuit is the multichannel driving circuit, and first switch and second switch are arranged in the LED driving circuit.
According to yet another embodiment of the invention, wherein LED driving circuit starts so that drive current to be provided according to enable signal backlight.
According to the embodiment that the present invention has more, enable signal wherein backlight produces according to the first Wave-wide regulation controlled electric signal and the second Wave-wide regulation controlled electric signal.Backlight module more comprises the activation unit, produces enable signal backlight so that one of them is positioned at the accurate position of activation in the first Wave-wide regulation controlled electric signal and the second Wave-wide regulation controlled electric signal.
Another aspect of the present invention is in a kind of display device is provided, and comprises: backlight module and picture element array.Backlight module comprises: the first visual angle light emitting diode string, the second visual angle light emitting diode string, first switch, second switch, LED driving circuit and pattern control module.First switch is according to the first Wave-wide regulation controlled electric signal activation or press down the ability first visual angle light emitting diode string.Second switch is according to the second Wave-wide regulation controlled electric signal activation or press down the ability second visual angle light emitting diode string.LED driving circuit is in order to produce drive current.The pattern control module switches backlight module between two dimensional mode and 3-D display pattern, to produce the first Wave-wide regulation controlled electric signal and the second Wave-wide regulation controlled electric signal according to the pattern controlling signal.The picture element array comprises plural picture element.Wherein work as the pattern control module and switch backlight module under two dimensional mode according to the pattern controlling signal; The first Wave-wide regulation controlled electric signal and the second Wave-wide regulation controlled electric signal make first switch and the synchronous conducting of second switch and close; So that the first visual angle light emitting diode string and the second visual angle light emitting diode string are luminous according to drive current jointly, plural picture element provides display frame by the first visual angle light emitting diode string and the second visual angle light emitting diode string according to video data.When the pattern control module switches backlight module under the 3-D display pattern according to the pattern controlling signal; The first Wave-wide regulation controlled electric signal and the second Wave-wide regulation controlled electric signal make first switch and the staggered conducting of second switch and close; So that the first visual angle light emitting diode string and the second visual angle light emitting diode string one of them is luminous according to drive current, plural picture element provides the first visual angle display frame and by the second visual angle light emitting diode string and second video data second visual angle display frame is provided by the first visual angle light emitting diode string and first video data in regular turn.
According to one embodiment of the invention, wherein LED driving circuit is the single channel driving circuit, and first switch and second switch independently are arranged at outside the LED driving circuit.
According to another embodiment of the present invention, wherein first switch and the first visual angle light emitting diode string are in series, and the second switch and the second visual angle light emitting diode string are in series.
According to further embodiment of this invention, wherein LED driving circuit is the multichannel driving circuit, and first switch and second switch are arranged in the LED driving circuit.
According to yet another embodiment of the invention, wherein LED driving circuit starts so that drive current to be provided according to enable signal backlight.
According to one embodiment of the invention, enable signal wherein backlight produces according to the first Wave-wide regulation controlled electric signal and the second Wave-wide regulation controlled electric signal.Backlight module more comprises the activation unit, produces enable signal backlight so that one of them is positioned at the accurate position of activation in the first Wave-wide regulation controlled electric signal and the second Wave-wide regulation controlled electric signal.
Another aspect of the present invention is that a kind of backlight module control method is being provided, and is applied in the backlight module of display device, and the backlight module control method comprises: produce the first Wave-wide regulation controlled electric signal and the second Wave-wide regulation controlled electric signal according to the pattern controlling signal; Judge that according to the pattern controlling signal backlight module is in two dimensional mode or 3-D display pattern; When display device under two dimensional mode; Drive current is provided; But and according to the activation simultaneously of the first Wave-wide regulation controlled electric signal and the second Wave-wide regulation controlled electric signal and the first visual angle light emitting diode string and the second visual angle light emitting diode string that can be in parallel, so that the first visual angle light emitting diode string and the second visual angle light emitting diode string are luminous according to drive current jointly; When display device under the 3-D display pattern; Drive current is provided; And according to the staggered activation of the first Wave-wide regulation controlled electric signal and the second Wave-wide regulation controlled electric signal and press down can the first visual angle light emitting diode string and the second visual angle light emitting diode string so that the first visual angle light emitting diode string and the second visual angle light emitting diode string one of them is luminous according to drive current.
According to one embodiment of the invention, provide drive current more to comprise: drive current to be provided according to enable signal backlight.Enable signal wherein backlight produces when one of them is positioned at the accurate position of activation in the first Wave-wide regulation controlled electric signal and the second Wave-wide regulation controlled electric signal.
According to another embodiment of the present invention; Wherein under two dimensional mode, the first visual angle light emitting diode string and the second visual angle light emitting diode string are more comprised according to the luminous step of drive current jointly: the plural picture element in the picture element array of display device provides display frame by the first visual angle light emitting diode string and the second visual angle light emitting diode string according to video data.
According to yet another embodiment of the invention; Wherein under the 3-D display pattern, one of them more comprises according to the luminous step of drive current to make the first visual angle light emitting diode string and the second visual angle light emitting diode string: the plural picture element in the picture element array of display device provides the first visual angle display frame and by the second visual angle light emitting diode string and second video data second visual angle display frame is provided by the first visual angle light emitting diode string and first video data in regular turn.
Using advantage of the present invention ties up in by the light emitting diode string that under two dimensional mode, makes different visual angles conducting simultaneously and the staggered conducting of light emitting diode string that under the 3-D display pattern, makes different visual angles; Can keep whole brightness of backlight module, and reach above-mentioned purpose easily.
Description of drawings
For letting above and other objects of the present invention, characteristic, advantage and the embodiment can be more obviously understandable, appended graphic explanation be following:
Fig. 1 is in one embodiment of the invention, a kind of calcspar of display device;
Fig. 2 is in one embodiment of the invention, the calcspar of the backlight module of Fig. 1;
Fig. 3 A is in one embodiment of the invention, the backlight module of Fig. 2 under two dimensional mode, the sequential chart of video data, the first Wave-wide regulation controlled electric signal, the second Wave-wide regulation controlled electric signal and enable signal;
Fig. 3 B is in one embodiment of the invention, the backlight module of Fig. 2 under the 3-D display pattern, the sequential chart of video data, the first Wave-wide regulation controlled electric signal, the second Wave-wide regulation controlled electric signal and enable signal;
Fig. 4 is in the second embodiment of the present invention, the calcspar of the backlight module of Fig. 1;
Fig. 5 A is in the second embodiment of the present invention, the backlight module of Fig. 4 under two dimensional mode, the sequential chart of video data, the first Wave-wide regulation controlled electric signal, the second Wave-wide regulation controlled electric signal and enable signal;
Fig. 5 B is in the second embodiment of the present invention, the backlight module of Fig. 4 under the 3-D display pattern, the sequential chart of video data, the first Wave-wide regulation controlled electric signal, the second Wave-wide regulation controlled electric signal and enable signal;
Fig. 6 is in the third embodiment of the present invention, the calcspar of the backlight module of Fig. 1;
Fig. 7 is in one embodiment of the invention, the process flow diagram of backlight module control method.
[primary clustering symbol description]
1: display device
12: the picture element array
16: gate pole driver
20: the first visual angle light emitting diode string
22: the second visual angle light emitting diode string
26: second switch
40: the activation unit
701-709: step
D1-Dn: video data
I: drive current
VLED+: positive voltage terminal
BE: enable signal backlight
PWM1: the first Wave-wide regulation controlled electric signal 10: backlight module
14: source electrode driver
18: time schedule controller
21: the pattern control module
24: the first switches
28: LED driving circuit
700: the backlight module control method
CL: pattern controlling signal
G1-Gm: gate trigger signal
VIN: power signal
VLED-: negative voltage side
DE: data enable signal
PWM2: the second Wave-wide regulation controlled electric signal.
Embodiment
Please with reference to Fig. 1.Fig. 1 is in one embodiment of the invention, a kind of calcspar of display device 1.
Please with reference to Fig. 2.Fig. 2 is in one embodiment of the invention, the calcspar of the backlight module 10 of Fig. 1.Backlight module 10 comprises: the first visual angle light emitting diode string 20, the second visual angle light emitting diode string 22, first switch 24, second switch 26, LED driving circuit 28 and pattern control module 21.
In present embodiment; LED driving circuit 28 is single-channel driving circuits; Therefore first switch 24 and second switch 26 independently are arranged at outside the LED driving circuit 28, and are in series with the first visual angle light emitting diode string 20 and the second visual angle light emitting diode string 22 respectively.And the first visual angle light emitting diode string 20 and first switch, 24 formed branch roads will join with negative voltage side (VLED-) with the positive voltage terminal (VLED+) with LED driving circuit 28 with the second visual angle light emitting diode string 22 is parallelly connected with second switch 26 formed branch roads.
Please with reference to Fig. 3 A and Fig. 3 B.Fig. 3 A is in one embodiment of the invention; The backlight module 10 of key diagram 2 under two dimensional mode, the sequential chart of the enable signal BE backlight of video data, the first Wave-wide regulation controlled electric signal PWM1, the second Wave-wide regulation controlled electric signal PWM2 and LED driving circuit 28.Fig. 3 B is in one embodiment of the invention; The backlight module 10 of key diagram 2 under the 3-D display pattern, the sequential chart of the enable signal BE backlight of video data, the first Wave-wide regulation controlled electric signal PWM1, the second Wave-wide regulation controlled electric signal PWM2 and LED driving circuit 28.
Shown in Fig. 2 and Fig. 3 A, under two dimensional mode, enable signal BE backlight at first transfers high attitude to by low state, and LED driving circuit 28 is started.After according to data enable signal DE, in each picture frame (like n picture frame and the n+1 picture frame among Fig. 3 A), will transmit two video datas.In present embodiment, this two video data is the first visual angle video data, and meaning is that the video data that picture element array 12 integral body among Fig. 1 will receive same view angle shows.At this moment, the first Wave-wide regulation controlled electric signal PWM1 and the second Wave-wide regulation controlled electric signal PWM2 will make first switch 24 and second switch 26 synchronous conductings and close according to video data.Therefore, the first visual angle light emitting diode string 20 and the second visual angle light emitting diode string 22 also will synchronously be enabled and press down ability.Because the first visual angle light emitting diode string 20 and 22 parallel connections of the second visual angle light emitting diode string; When being enabled synchronously and when luminous, with half the (when the load value of the first visual angle light emitting diode string 20 and the second visual angle light emitting diode string 22 approximately equates) that be assigned to drive current I fifty-fifty.Therefore, what picture element array 12 can be by the first visual angle light emitting diode string 20 and the second visual angle light emitting diode string 22 is luminous, according to video data display frame is provided.
Shown in Fig. 2 and Fig. 3 B, under the 3-D display pattern, enable signal BE backlight at first transfers high attitude to by low state, and LED driving circuit 28 is started.In the n picture frame, also will transmit two video datas.Because the 3-D display pattern need transmit the data of different visual angles at different time, therefore in single picture frame, will successively transmit the first visual angle video data and the second visual angle video data.In an embodiment, the first visual angle video data is a video data of desiring to send to user's left eye, and is sent to picture element array 12 to show.The second visual angle video data is then for to desire to send to the video data of user's right eye, and is sent to picture element array 12 to show.
At this moment, the first Wave-wide regulation controlled electric signal PWM1 and the second Wave-wide regulation controlled electric signal PWM2 will make first switch 24 and second switch 26 staggered conductings and close.Therefore, the first visual angle light emitting diode string 20 and the second visual angle light emitting diode string 22 only have one of them luminous according to drive current I in the single time.In 3B figure; When receiving the first visual angle video data; First switch 24 will make the first visual angle light emitting diode string 20 luminous thereupon conducting, and makes picture element array 12 luminous by the first visual angle light emitting diode string 20, according to the first visual angle video data the first visual angle display frame is provided.And when receiving the second visual angle video data; Second switch 26 will make the second visual angle light emitting diode string 22 luminous thereupon conducting; And make picture element array 12 luminous by the second visual angle light emitting diode string 22, according to the second visual angle video data the second visual angle display frame is provided.
Therefore; Backlight module of the present invention can be under two dimensional mode; Make picture element array 12 display frame is provided, and each first visual angle light emitting diode string 20 and the second visual angle light emitting diode string 22 are to carry out luminous according to half of drive current I according to the first visual angle light emitting diode string 20 and the luminous of the second visual angle light emitting diode string 22 of activations simultaneously.Under the 3-D display pattern; The picture element of picture element array 12 then provides the first visual angle display frame and the second visual angle display frame respectively according to the first visual angle light emitting diode string 20 and the luminous of the second visual angle light emitting diode string 22 of staggered activation, and each first visual angle light emitting diode string 20 and the second visual angle light emitting diode string 22 are to carry out luminous according to drive current I.
In sum; Under different display modes; Backlight module 10 can adopt single driving circuit; Width not changing the first Wave-wide regulation controlled electric signal PWM1 and the second Wave-wide regulation controlled electric signal PWM2 is adjusted under the situation of lighting time, makes to provide to keep identically to the backlight illumination of picture element array 12, and the switching that is unlikely between display mode causes user's discomfort.Therefore, backlight module 10 will not need the complicated control hardware of additional designs, can reach above-mentioned purpose, also can be controlled in the reasonable range for the moment starting current of driving circuit.
Please with reference to Fig. 4.Fig. 4 is in the another embodiment of the present invention, the calcspar of the backlight module 10 of Fig. 1.The backlight module 10 of present embodiment is similar with Fig. 2.Yet in present embodiment, backlight module 10 more comprises activation unit 40.Activation unit 40 can be in order to receive the first Wave-wide regulation controlled electric signal PWM1 and the second Wave-wide regulation controlled electric signal PWM2.In present embodiment, when one of them is positioned at the accurate position of activation at the first Wave-wide regulation controlled electric signal PWM1 and the second Wave-wide regulation controlled electric signal PWM2, produce enable signal BE backlight.
Please be simultaneously with reference to Fig. 5 A and Fig. 5 B.Fig. 5 A is in one embodiment of the invention; The backlight module 10 of key diagram 4 under two dimensional mode, the sequential chart of the enable signal BE backlight of video data, the first Wave-wide regulation controlled electric signal PWM1, the second Wave-wide regulation controlled electric signal PWM2 and LED driving circuit 28.Fig. 5 B is in one embodiment of the invention; The backlight module 10 of key diagram 4 under the 3-D display pattern, the sequential chart of the enable signal BE backlight of video data, the first Wave-wide regulation controlled electric signal PWM1, the second Wave-wide regulation controlled electric signal PWM2 and LED driving circuit 28.
Produce when one of them is positioned at the accurate position of activation because enable signal BE backlight is activation unit 40 at the first Wave-wide regulation controlled electric signal PWM1 and the second Wave-wide regulation controlled electric signal PWM2; Therefore in present embodiment, enable signal BE backlight only the first Wave-wide regulation controlled electric signal PWM1 and the second Wave-wide regulation controlled electric signal PWM2 wherein one during for high attitude just for high attitude to open LED driving circuit 28 so that drive current I to be provided.Because LED driving circuit 28 has overvoltage protection mechanism, when detecting the light emitting diode string open circuit, to start this protection mechanism.Yet because the characteristic of the backlight module 10 of sequence scanning formula; Light emitting diode string can be interlocked between opening and closing and operated; Therefore when light emitting diode string is closed; LED driving circuit 28 has the situation generation that superpotential drives, and increases spuious power consumption penalty and reduces circuit conversion efficient.Therefore; One of them is positioned at the enable signal BE backlight that the accurate position of activation just produces and can when light emitting diode string is closed, also closes LED driving circuit 28 simultaneously to utilize the first Wave-wide regulation controlled electric signal PWM1 and the second Wave-wide regulation controlled electric signal PWM2 in the present embodiment, avoids the situation generation of overvoltage protection mechanism erroneous judgement.In an embodiment, activation unit 40 can by or door or other possible synchronous device realize.
Please with reference to Fig. 6.Fig. 6 is in the another embodiment of the present invention, the calcspar of the backlight module 10 of Fig. 1.The backlight module 10 of present embodiment is similar with Fig. 2.Yet in present embodiment, the LED driving circuit 28 in the backlight module 10 is the multichannel driving circuit.First switch 24 and second switch 26 can be arranged in the LED driving circuit 28.The first visual angle light emitting diode string 20 and the second visual angle light emitting diode string 22 can be connected with LED driving circuit 28 by different channels respectively; And further switch by first switch 24 and the second switch 26 of LED driving circuit 28 set inside, reach the effect that the backlight module 10 of Fig. 2 switches between two dimension and 3-D display pattern.And; In present embodiment; Also can be by the circuit design of LED driving circuit 28 inside; Receive the enable signal BE backlight directly open or close and operate with the mode of Fig. 3 A and Fig. 3 B, or make enable signal BE backlight in inside by the first Wave-wide regulation controlled electric signal PWM1 and second Wave-wide regulation controlled electric signal PWM2 generation, operate with the mode of Fig. 5 A and Fig. 5 B.
Be noted that, in the foregoing description, be merely an embodiment, in other embodiment, also possibly produce activation and the effect that presses down ability respectively by low state and high attitude about the high attitude of signal and the statement of low state.
Please with reference to Fig. 7.Fig. 7 is in one embodiment of the invention, the process flow diagram of backlight module control method 700.Backlight module control method 700 can be applicable to as in Fig. 2, Fig. 4 and the backlight module 10 shown in Figure 6.Backlight module control method 700 comprise the following step (should be appreciated that mentioned step in this embodiment except that chatting bright its order person especially, all can be adjusted order before and after it according to actual needs, in addition can be simultaneously or part carry out simultaneously).
In step 701, judge according to pattern controlling signal CL whether backlight module 10 is arranged in two dimensional mode.When display mode is a two dimensional mode; In step 702; Produce the first Wave-wide regulation controlled electric signal PWM1 and the second Wave-wide regulation controlled electric signal PWM2 according to pattern controlling signal CL; And in step 703; Drive current I is provided, but and in step 704 according to the first Wave-wide regulation controlled electric signal PWM1 and second Wave-wide regulation controlled electric signal PWM2 activation simultaneously and the first visual angle light emitting diode string 20 and the second visual angle light emitting diode string 22 that can be in parallel, in step 705, to make the first visual angle light emitting diode string 20 and the second visual angle light emitting diode string 22 luminous according to drive current jointly.
When display mode is not a two dimensional mode; Judge that then display device 1 is under the 3-D display pattern; And, produce the first Wave-wide regulation controlled electric signal PWM1 and the second Wave-wide regulation controlled electric signal PWM2, and drive current is provided in step 707 according to pattern controlling signal CL in step 706.In step 708; According to the staggered activation of the first Wave-wide regulation controlled electric signal PWM1 and the second Wave-wide regulation controlled electric signal PWM2 and press down can the first visual angle light emitting diode string 20 and the second visual angle light emitting diode string 22, one of them is luminous according to drive current I in step 709, to make the first visual angle light emitting diode string 20 and the second visual angle light emitting diode string 22.
Use advantage of the present invention and tie up in by the light emitting diode string that under two dimensional mode, makes different visual angles conducting simultaneously, and the staggered conducting of light emitting diode string that under the 3-D display pattern, makes different visual angles, whole brightness of backlight module can be kept.
Though the present invention discloses as above with embodiment; Right its is not in order to limiting the present invention, anyly has the knack of this art, do not breaking away from the spirit and scope of the present invention; When can doing various changes and retouching, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (19)
1. backlight module is applied to it is characterized in that in the display device that this backlight module comprises:
One first visual angle light emitting diode string;
One second visual angle light emitting diode string;
One first switch is with according to one first Wave-wide regulation controlled electric signal activation or press down can this first visual angle light emitting diode string;
One second switch is with according to one second Wave-wide regulation controlled electric signal activation or press down can this second visual angle light emitting diode string;
One LED driving circuit is in order to produce a drive current; And
One pattern control module switches this backlight module between a two dimensional mode and a 3-D display pattern, to produce this first Wave-wide regulation controlled electric signal and this second Wave-wide regulation controlled electric signal according to a pattern controlling signal;
Wherein in switching this backlight module under this two dimensional mode according to this pattern controlling signal when this pattern control module; This first Wave-wide regulation controlled electric signal and this second Wave-wide regulation controlled electric signal make this first switch and this first visual angle light emitting diode string of the synchronous activation of this second switch and this second visual angle light emitting diode string, so that this first visual angle light emitting diode string and this second visual angle light emitting diode string are luminous according to this drive current jointly;
In switching this backlight module under this 3-D display pattern according to this pattern controlling signal when this pattern control module; This first Wave-wide regulation controlled electric signal and this second Wave-wide regulation controlled electric signal make staggered this first visual angle light emitting diode string of activation of this first switch and this second switch and this second visual angle light emitting diode string so that this first visual angle light emitting diode string and this second visual angle light emitting diode string one of them is luminous according to this drive current.
2. backlight module according to claim 1 is characterized in that: wherein this LED driving circuit is a single channel driving circuit, and this first switch and this second switch system independently are arranged at outside this LED driving circuit.
3. backlight module according to claim 1 is characterized in that: wherein this first switch and this first visual angle light emitting diode string are in series, and this second switch and this second visual angle light emitting diode string are in series.
4. backlight module according to claim 1 is characterized in that: wherein this LED driving circuit is a multichannel driving circuit, and this first switch and this second switch system are arranged in this LED driving circuit.
5. backlight module according to claim 1 is characterized in that: wherein this LED driving circuit starts so that this drive current to be provided according to an enable signal backlight.
6. backlight module according to claim 1 is characterized in that: wherein this enable signal backlight produces according to this first Wave-wide regulation controlled electric signal and this second Wave-wide regulation controlled electric signal.
7. backlight module according to claim 6 is characterized in that: more comprise an activation unit, produce this enable signal backlight so that one of them is positioned at the accurate position of an activation in this first Wave-wide regulation controlled electric signal and this second Wave-wide regulation controlled electric signal.
8. a display device is characterized in that, comprises:
One backlight module comprises:
One first visual angle light emitting diode string;
One second visual angle light emitting diode string;
One first switch is with according to one first Wave-wide regulation controlled electric signal activation or press down can this first visual angle light emitting diode string;
One second switch is with according to one second Wave-wide regulation controlled electric signal activation or press down can this second visual angle light emitting diode string;
One LED driving circuit is in order to produce a drive current; And
One pattern control module switches this backlight module between a two dimensional mode and a 3-D display pattern, to produce this first Wave-wide regulation controlled electric signal and this second Wave-wide regulation controlled electric signal according to a pattern controlling signal; And
One picture element array comprises plural picture element;
Wherein work as this pattern control module and switch this backlight module under this two dimensional mode according to this pattern controlling signal; This first Wave-wide regulation controlled electric signal and this second Wave-wide regulation controlled electric signal make this first switch and this first visual angle light emitting diode string of the synchronous activation of this second switch and this second visual angle light emitting diode string; So that this first visual angle light emitting diode string and this second visual angle light emitting diode string are luminous according to this drive current jointly, these picture elements provide a display frame by this first visual angle light emitting diode string and this second visual angle light emitting diode string according to a video data;
When this pattern control module switches this backlight module under this 3-D display pattern according to this pattern controlling signal; This first Wave-wide regulation controlled electric signal and this second Wave-wide regulation controlled electric signal make this first switch and staggered this first visual angle light emitting diode string of activation of this second switch and this second visual angle light emitting diode string; So that this first visual angle light emitting diode string and this second visual angle light emitting diode string one of them is luminous according to this drive current, these picture elements provide one first visual angle display frame and by this second visual angle light emitting diode string and one second video data one second visual angle display frame are provided by this first visual angle light emitting diode string and one first video data.
9. display device according to claim 8 is characterized in that: wherein this LED driving circuit is a single channel driving circuit, and this first switch and this second switch system independently are arranged at outside this LED driving circuit.
10. display device according to claim 8 is characterized in that: wherein this first switch and this first visual angle light emitting diode string are in series, and this second switch and this second visual angle light emitting diode string are in series.
11. display device according to claim 8 is characterized in that: wherein this LED driving circuit is a multichannel driving circuit, and this first switch and this second switch system are arranged in this LED driving circuit.
12. display device according to claim 8 is characterized in that: wherein this LED driving circuit starts so that this drive current to be provided according to an enable signal backlight.
13. display device according to claim 12 is characterized in that: wherein this enable signal backlight produces according to this first Wave-wide regulation controlled electric signal and this second Wave-wide regulation controlled electric signal.
14. display device according to claim 13; It is characterized in that: wherein this backlight module more comprises an activation unit, produces this enable signal backlight so that one of them is positioned at the accurate position of an activation in this first Wave-wide regulation controlled electric signal and this second Wave-wide regulation controlled electric signal.
15. a backlight module control method is applied to it is characterized in that in the backlight module of a display device that this backlight module control method comprises:
Judge that according to a pattern controlling signal this backlight module is arranged in a two dimensional mode or a 3-D display pattern;
Produce one first Wave-wide regulation controlled electric signal and one second Wave-wide regulation controlled electric signal according to this pattern controlling signal;
When this display device lies under this two dimensional mode; One drive current is provided; But and according to the activation simultaneously of this first Wave-wide regulation controlled electric signal and this second Wave-wide regulation controlled electric signal and the one first visual angle light emitting diode string and the one second visual angle light emitting diode string that can be in parallel, so that this first visual angle light emitting diode string and this second visual angle light emitting diode string are luminous according to this drive current jointly;
When this display device lies under this 3-D display pattern; This drive current is provided; And according to the staggered activation of this first Wave-wide regulation controlled electric signal and this second Wave-wide regulation controlled electric signal and press down can this first visual angle light emitting diode string and this second visual angle light emitting diode string so that this first visual angle light emitting diode string and this second visual angle light emitting diode string one of them is luminous according to this drive current.
16. backlight module control method according to claim 15 is characterized in that, provides this drive current more to comprise:
According to an enable signal backlight this drive current is provided.
17. backlight module control method according to claim 16 is characterized in that: wherein this enable signal backlight produces when one of them is positioned at the accurate position of an activation in this first Wave-wide regulation controlled electric signal and this second Wave-wide regulation controlled electric signal.
18. backlight module control method according to claim 15 is characterized in that: wherein under this two dimensional mode, this first visual angle light emitting diode string and this second visual angle light emitting diode string are more comprised jointly according to the luminous step of this drive current:
Plural picture element in the one picture element array of this display device provides a display frame by this first visual angle light emitting diode string and this second visual angle light emitting diode string according to a video data.
19. backlight module control method according to claim 15; It is characterized in that: wherein under this 3-D display pattern, one of them more comprises according to the luminous step of this drive current to make this first visual angle light emitting diode string and this second visual angle light emitting diode string:
Plural picture element in the one picture element array of this display device provides one first visual angle display frame and by this second visual angle light emitting diode string and one second video data one second visual angle display frame is provided by this first visual angle light emitting diode string and one first video data.
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| CN201210094932.8A CN102610200B (en) | 2012-04-01 | 2012-04-01 | Backlight module and control method thereof and display device applying backlight module |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014101309A1 (en) * | 2012-12-27 | 2014-07-03 | 深圳市华星光电技术有限公司 | Overvoltage protection method for backlight drive circuit in 2d/3d mode, and backlight drive circuit applying the method |
| WO2014110850A1 (en) * | 2013-01-21 | 2014-07-24 | 深圳市华星光电技术有限公司 | Backlight drive circuit overvoltage protection method |
| US8982521B2 (en) | 2013-01-21 | 2015-03-17 | Shenzhen China Star | Overvoltage protection method for backlight driver |
| US9024540B2 (en) | 2012-12-27 | 2015-05-05 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Overvoltage protection method for backlight drive circuit of 2D/3D mode and backlight drive circuit using same |
| WO2016115776A1 (en) * | 2015-01-21 | 2016-07-28 | 深圳市华星光电技术有限公司 | 2d/3d switchable display apparatus |
| CN110890070A (en) * | 2019-09-25 | 2020-03-17 | 歌尔科技有限公司 | VR display equipment, double-screen backlight driving device and method |
| CN111681617A (en) * | 2020-06-24 | 2020-09-18 | 歌尔科技有限公司 | Double-display-screen backlight driving circuit and method and double-display-screen equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070188711A1 (en) * | 2006-02-10 | 2007-08-16 | Colorlink, Inc. | Multi-functional active matrix liquid crystal displays |
| CN101334555A (en) * | 2007-06-25 | 2008-12-31 | 三星电子株式会社 | Backlight unit and 2d/3d switchable image display device employing the backlight unit |
| CN101339307A (en) * | 2007-07-05 | 2009-01-07 | Lg.菲利浦Lcd株式会社 | Display device |
| CN102053406A (en) * | 2009-11-09 | 2011-05-11 | 李文峰 | Stereoscopic display |
| CN102163413A (en) * | 2010-02-19 | 2011-08-24 | Lg电子株式会社 | Image display device and method for operating the same |
| CN102238399A (en) * | 2010-05-06 | 2011-11-09 | 乐金显示有限公司 | Stereoscopic image display and method for driving the same |
-
2012
- 2012-04-01 CN CN201210094932.8A patent/CN102610200B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070188711A1 (en) * | 2006-02-10 | 2007-08-16 | Colorlink, Inc. | Multi-functional active matrix liquid crystal displays |
| CN101334555A (en) * | 2007-06-25 | 2008-12-31 | 三星电子株式会社 | Backlight unit and 2d/3d switchable image display device employing the backlight unit |
| CN101339307A (en) * | 2007-07-05 | 2009-01-07 | Lg.菲利浦Lcd株式会社 | Display device |
| CN102053406A (en) * | 2009-11-09 | 2011-05-11 | 李文峰 | Stereoscopic display |
| CN102163413A (en) * | 2010-02-19 | 2011-08-24 | Lg电子株式会社 | Image display device and method for operating the same |
| CN102238399A (en) * | 2010-05-06 | 2011-11-09 | 乐金显示有限公司 | Stereoscopic image display and method for driving the same |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014101309A1 (en) * | 2012-12-27 | 2014-07-03 | 深圳市华星光电技术有限公司 | Overvoltage protection method for backlight drive circuit in 2d/3d mode, and backlight drive circuit applying the method |
| US9024540B2 (en) | 2012-12-27 | 2015-05-05 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Overvoltage protection method for backlight drive circuit of 2D/3D mode and backlight drive circuit using same |
| WO2014110850A1 (en) * | 2013-01-21 | 2014-07-24 | 深圳市华星光电技术有限公司 | Backlight drive circuit overvoltage protection method |
| US8982521B2 (en) | 2013-01-21 | 2015-03-17 | Shenzhen China Star | Overvoltage protection method for backlight driver |
| WO2016115776A1 (en) * | 2015-01-21 | 2016-07-28 | 深圳市华星光电技术有限公司 | 2d/3d switchable display apparatus |
| CN110890070A (en) * | 2019-09-25 | 2020-03-17 | 歌尔科技有限公司 | VR display equipment, double-screen backlight driving device and method |
| CN111681617A (en) * | 2020-06-24 | 2020-09-18 | 歌尔科技有限公司 | Double-display-screen backlight driving circuit and method and double-display-screen equipment |
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| Publication number | Publication date |
|---|---|
| CN102610200B (en) | 2014-06-04 |
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Effective date of registration: 20170808 Address after: 1#, building third, fourth, 6 West Road, Mawei West Road, Mawei District, Fujian, Fuzhou Co-patentee after: Chunghwa Picture Tubes Ltd. Patentee after: CPT DISPLAY TECHNOLOGY (SHENZHEN)CO., LTD. Address before: 350015, Xingye Road, Mawei Science Park, Fujian, Fuzhou 1, China Co-patentee before: Chunghwa Picture Tubes Ltd. Patentee before: Fujian Huaying Display Technology Co., Ltd. |
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