CN101852362A - Back light module, driving method thereof and liquid crystal display - Google Patents
Back light module, driving method thereof and liquid crystal display Download PDFInfo
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- CN101852362A CN101852362A CN200910081209A CN200910081209A CN101852362A CN 101852362 A CN101852362 A CN 101852362A CN 200910081209 A CN200910081209 A CN 200910081209A CN 200910081209 A CN200910081209 A CN 200910081209A CN 101852362 A CN101852362 A CN 101852362A
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Abstract
The invention relates to a back light module, a driving method thereof and a liquid crystal display. The back light module comprises a light guide chamber, a back light source, a grating cover and a reflection mirror, wherein the light guide chamber comprises a back plate; the back light source is arranged at the side of the light guide chamber; the grating cover covers outside the back light source, at least one grating seam for transmitting light beams emitted by the back light source to form scanning light beams is arranged on the grating cover, and the grating cover rotates around the back light source so that the scanning light beams movably irradiates on the back plate of the light guide chamber; and the reflection mirror is arranged on the back plate of the light guide chamber and used for reflecting the movably-irradiated scanning light beams out of the light guide chamber. The method comprises the steps of: driving the back light source to lighten, and forming the scanning light beams through the transmission of the light beams out of the grating seam on the grating cover; driving the grating cover to rotate according to the set frequency, movably irradiating on the back plate by the scanning light beams, and reflecting the scanning light beams out of the light guide chamber by the reflection mirror. The technical scheme can reduce the thickness of the liquid crystal display, reduce the energy consumption for driving, and save the cost.
Description
Technical field
The present invention relates to the LCD backlight actuation techniques, relate in particular to a kind of module backlight and driving method and LCD.
Background technology
LCD is one of flat-panel screens of using always, and thin typeization is one of LCD development trend of answering the market demand.Because of liquid crystal molecule can not provide light source so module backlight need be set in the transmission type lcd device usually from main light emission.
LCD is different from traditional cathode-ray tube (Cathode Ray Tube; Hereinafter to be referred as: CRT) the pulse display mode of display, can in human eye, stay persistence of vision during display frame, so particularly in motion picture, have smear phenomenon (blur).Exist several different methods to solve this problem at present, wherein just comprised the use scanning backlight.
Fig. 1 is a kind of liquid crystal display device structure schematic diagram that adopts scanning backlight in the prior art, module backlight is arranged on the rear of liquid crystal panel 20, the structure of module backlight comprises that mainly many strip fluorescent tubes are as backlight 1, be disposed on the below of liquid crystal panel 20 abreast, be provided with grating cover 2 in backlight 1 outside, be formed with a grid seam 3 on the grating cover 2.In the course of the work, at first light backlight 1, and rear drive grating cover 2 is around backlight 1 rotation, then the light launched of backlight 1 periodically shines on the liquid crystal panel 20.Can control pixel region on the liquid crystal panel 20 by the velocity of rotation of adjusting grating cover 2 and be shone one by one regionally and light, thereby form scanning backlight.
But, above-mentioned technology exists certain defective, it is the rear that fluorescent tube is arranged on liquid crystal panel, cause the integral thickness of LCD to increase, run counter to the slimming development trend of LCD, be subjected to the restriction of fluorescent tube volume, this scanning backlight can only be applied to TV and field of display, and can't use in the thin type display devices such as notebook.In addition, LCD needs many fluorescent tube alternation switches to reach the effect of scanning simultaneously, and quantity of light source is many, and is low to the utilization rate of light, causes that driving power consumption is big, cost is high.
Summary of the invention
The purpose of this invention is to provide a kind of module backlight and driving method and LCD,, make LCD more frivolous to reduce the thickness of module backlight.
For achieving the above object, the invention provides a kind of module backlight, comprising:
The leaded light chamber, described leaded light chamber comprises backboard;
Backlight is arranged on the side in described leaded light chamber;
Grating cover, be located at the outside of described backlight, described grating cover is provided with at least one grid seams, be used for the transmission backlight and emit beam and form scanning light beam, described grating cover around described backlight rotation so that described scanning light beam move on the backboard that is radiated at described leaded light chamber;
Speculum is arranged on the backboard in described leaded light chamber, and the described scanning light beam that is used for moving irradiation reflects described leaded light chamber.
For achieving the above object, the present invention also provides a kind of module unit driving method backlight, comprising:
The driving backlight is lighted, and the grid on the grating cover of the light of described backlight emission through being located at the described backlight outside stitch transmission and go out, and form scanning light beam;
Driving described grating cover according to setpoint frequency rotates around described backlight, described backlight side is provided with the leaded light chamber, the leaded light chamber comprises backboard, and described scanning light beam moves and is radiated on the described backboard, and the speculum order-reflected that is provided with on described backboard goes out described leaded light chamber.
For achieving the above object, the present invention also provides a kind of the present invention of comprising the LCD of module backlight, also comprise liquid crystal panel and framework, wherein: described liquid crystal panel and described module backlight are embedded in described framework, array base palte in described leaded light chamber and the described liquid crystal panel is contiguous to be provided with, and described mirror reflects goes out the scanning light beam in described leaded light chamber and injects in the described liquid crystal panel.
By above technical scheme as can be known, the present invention adopts the grid seam on the grating cover to form the scanning light beam that moves, with speculum the motion scan light beam is penetrated the leaded light chamber in proper order, promptly order is injected liquid crystal panel, adopts technique scheme, backlight can be arranged on the side in leaded light chamber, thereby reduce the thickness of module backlight, reduce the thickness of LCD, can also reduce the quantity of backlight, thereby the reduction driving power consumption is saved cost.
Description of drawings
Fig. 1 is a kind of liquid crystal display device structure schematic diagram that adopts scanning backlight in the prior art;
Fig. 2 is the structural representation one of the present invention module first embodiment backlight;
Fig. 3 is the structural representation two of the present invention module first embodiment backlight;
Fig. 4 is the structural representation of the present invention module second embodiment backlight;
Fig. 5 is the structural representation of the present invention module the 3rd embodiment backlight;
Fig. 6 is the index path of the present invention module the 3rd embodiment backlight;
Fig. 7 is the calculating schematic diagram one of the present invention module the 3rd embodiment backlight;
Fig. 8 is the calculating schematic diagram two of the present invention module the 3rd embodiment backlight;
Fig. 9 is the calculating schematic diagram three of the present invention module the 3rd embodiment backlight;
Figure 10 is the structural representation of the present invention module the 4th embodiment backlight;
Figure 11 is the flow chart of the present invention module unit driving method embodiment backlight;
Figure 12 is the structural representation of LCD embodiment of the present invention.
The specific embodiment
Also in conjunction with the accompanying drawings the present invention is described in further detail below by specific embodiment.
Module first embodiment backlight
Fig. 2 is the structural representation one of the present invention module first embodiment backlight.As shown in Figure 2, this module backlight comprises: leaded light chamber 4, backlight 1, grating cover 2 and speculum 5.Wherein, leaded light chamber 4 comprises backboard 42, a side surface relative with backboard 42 in the leaded light chamber 4 is the exiting surface 41 in leaded light chamber 4, when module backlight is assembled in the LCD, exiting surface 41 and liquid crystal panel 20 adjacent and parallel d, exiting surface 41 is an imaginary face, the plane of light incidence of corresponding liquid crystal panel 20; Backlight 1 is arranged on the side in leaded light chamber 4; Grating cover 2 is located at the outside of backlight 1, and grating cover 2 is provided with at least one grid seam 3, be used for transmission backlight 1 and emit beam and form scanning light beam, grating cover 2 around backlight 1 rotation so that scanning light beam move on the backboard 42 that is radiated at leaded light chamber 4; Speculum 5 is a level crossing, is set in parallel on the backboard 42 in leaded light chamber 4, the scanning light beam that is used for moving irradiation 4 reflections and going out from the leaded light chamber, and reflection enters exiting surface 41.
In the present embodiment, backlight can be the strip light source, also can be point source of light, can be the electroluminescent light source of point-like or strip, also can be the inorganic EL light source of point-like or strip.For example cold cathode illuminating source or hot cathode illuminating source can be, light emitting diode can also be.
The operation principle of present embodiment module backlight is: backlight 1 sends constant light, and grating cover 2 can be a tubular, and grid seam 3 is parallel with the side of exiting surface 41, and then the scanning light beam that stitches 3 outgoing from grid shines on the backboard 42; The speculum 5 that is provided with on the backboard 42 reflects leaded light chamber 4 with scanning light beam and enters exiting surface 41, is illustrated in figure 2 as the light path that scanning light beam shines liquid crystal panel 20 1 lateral edges; Grating cover 2 rotates around backlight 1 with setting speed, rotation along with grating cover 2, grid stitch 3 positions and change, then scanning light beam can move on backboard 42, and the angle between the speculum 5 changes, change has also taken place in the position of scanning light beam on exiting surface 41, and Fig. 3 shows the light path that scanning light beam shines liquid crystal panel 20 opposite side edges for the structural representation two of the present invention module first embodiment backlight.In the manner described above, scanning light beam can order-reflected go out leaded light chamber 4 and enter exiting surface 41, offers liquid crystal panel 20, and the pixel region on the driving liquid crystal panel 20 in zone is lighted one by one, realizes scanning backlight.The liquid crystal panel 20 and the module backlight of typical sizes have been shown among Fig. 2 and Fig. 3, wherein, the length L of liquid crystal panel 20 can be 20 centimetres, the length 1 of speculum 5 can be 11 centimetres, and this speculum 5 is in the side setting of backboard 42 near backlight 1, guarantee that the liquid crystal panel 20 high order ends light that can be reflected illuminates, the distance h between speculum 5 and the liquid crystal panel 20 can be 2 centimetres.
Adopt the technical scheme of present embodiment, its advantage is that scanning backlight can effectively alleviate the conditions of streaking that LCD shows; Backlight is arranged on the side in leaded light chamber, promptly can be arranged on the side of liquid crystal panel, and LGP can be set, and reduces the thickness of LCD, realizes lighteningly, can be applicable to electronic display units such as notebook computer; Can only adopt a backlight that scanning light beam is provided, improve the utilization rate of light, can reduce driving power consumption, save cost.
Second embodiment
Fig. 4 is the structural representation of the present invention module second embodiment backlight.The difference of the present embodiment and first embodiment is: the quantity of speculum 5 is a plurality of, be disposed on the backboard 42, and speculum 5 is a level crossing in the present embodiment.Preferably has an acute angle between each speculum plane, 5 place and the backboard 42.
The operation principle of present embodiment module backlight is: backlight 1 sends constant light, and the scanning light beam that stitches 3 outgoing from grid shines on the backboard 42; Be certain angle between speculum 5 that is provided with at interval on the backboard 42 and the backboard 42, scanning light beam can be reflected leaded light chamber 4, as shown in Figure 4; Around backlight 1 rotation, along with the rotation of grating cover 2, grid stitch 3 positions and change grating cover 2 with setting speed, and then scanning light beam can move on backboard 42, and when moving on the next speculum 5, then change has also taken place in the position of scanning light beam on exiting surface 41.In the manner described above, scanning light beam can order-reflected go out leaded light chamber 4, offers liquid crystal panel 20, and the pixel region on the driving liquid crystal panel 20 in zone is lighted one by one, realizes scanning backlight.
Adopt the technical scheme of present embodiment, its advantage is that scanning backlight can effectively alleviate the conditions of streaking that LCD shows; Backlight is arranged on the side in leaded light chamber, promptly can be arranged on the side of liquid crystal panel, and LGP can be set, and reduces the thickness of LCD, realizes lighteningly, can be applicable to electronic display units such as notebook computer; Can only adopt a backlight that scanning light beam is provided, improve the utilization rate of light, can reduce driving power consumption, save cost.
In concrete the application, when the transmission path of scanning light beam in the leaded light chamber more in short-term, can ignore the difference of each mirror reflects scanning light beam.When the transmission path of scanning light beam in the leaded light chamber is longer, can be by adjusting the angle between speculum and the backboard, adjust the position of speculum in the leaded light chamber, adjust the gap width on the grating cover, and/or the velocity of rotation of adjustment grating cover makes the incident scope area of scanning light beam on liquid crystal panel that moves irradiation meet the requirement of illuminating liquid crystal panel.Promptly when speculum is level crossing, can be to the direction away from backlight from the adjacent back light source, acute angle between each level crossing and the backboard, the center of each level crossing and the interval gradual change between the distance between the backboard and/or each level crossing are set, adjoin each other and do not overlap so that each flat mirror reflects goes out the illumination range in leaded light chamber.
Module the 3rd embodiment backlight
Fig. 5 is the structural representation of the present invention module the 3rd embodiment backlight.The difference of the present embodiment and second embodiment is: the speculum 5 among second embodiment is level crossing, and the speculum 5 in the present embodiment is a convex mirror.The advantage of convex mirror is to make the scope in scanning light beam ejaculation leaded light chamber 4 wideer by reflection, then can suitably reduce the quantity of speculum 5, also can be fit to scanning light beam long situation of transmission path in leaded light chamber 4.
In the present embodiment, the convex surface angle of convex mirror preferably is 90～170 degree, and so-called convex surface angle is meant the angle between convex mirror two edges and the convex mirror focus.The convex surface angle of each convex mirror also can be an alternation, meets the requirements at liquid crystal panel incident scope area so that move the scanning light beam of irradiation.Concrete, the cambered surface length of the center of circle, radius and convex mirror that can be by convex mirror is determined the shape and the position of convex mirror.Preferably, to the direction away from backlight, the interval gradual change between the convex surface angle of each convex mirror, the radius of each convex mirror and/or each convex mirror adjoins each other and does not overlap so that each convex mirror reflects the illumination range in leaded light chamber from the adjacent back light source.
Fig. 6 is the index path of the present invention module the 3rd embodiment backlight, in the present embodiment, preferably from adjacent back light source 1 to direction away from backlight 1, each speculum 5 one end and backboard 42 adjacency, the distance between the other end and the backboard 42 increases gradually.With four speculums 5 is example, distance between liquid crystal panel 20 and backboard 42 is 10 centimetres, when the distance of backlight 1 between liquid crystal panel 20 other ends was 60 centimetres, edge and the distance between the backboard 42 that four speculums 5 lift were respectively 2 centimetres, 3 centimetres, 4 centimetres and 5 centimetres.Being convex mirror increases gradually with respect to the angle of backboard 42, and the reflective surface radian reduces gradually.Scanning light beam moves along with the rotation of grating cover 2, and scanning light beam shines respectively on first, second, third and the 4th speculum 5 and reflexes on the liquid crystal panel 20 again.By position and the reflection radian of adjusting speculum 5, and the size of each piece speculum 5, can do not stopped when making scanning light beam shine on the speculum 5, can not occur the overlapping or phenomenon at interval of range of exposures after scanning light beam reflexes on the liquid crystal panel 20 by other speculums 5.
Concrete, can determine the position and the radian of each piece convex mirror by accurate Calculation, calculating definite mode has a lot, is a kind of account form wherein below.
Fig. 7,8 and 9 is respectively the calculating schematic diagram of the present invention module the 3rd embodiment backlight.At first setting up coordinate system, is initial point with the backlight, is designated as O (0,0), and liquid crystal panel is on X-axis, and the liquid crystal panel far-end is 42 centimetres to the distance of backlight, and the length of liquid crystal panel is 40 centimetres, and the distance between liquid crystal panel and the backboard is 10 centimetres.Determine the quantity of convex mirror again, each convex mirror is provided with at interval.Determine the coordinate of each convex mirror two edges, and an end and the distance between the backboard that definite convex mirror lifts are 4 centimetres, for the range of exposures of each piece convex mirror institute beam reflected on liquid crystal panel not only is not interrupted but also not overlapped, can set the scope of the pairing liquid crystal panel of each convex mirror.After above-mentioned condition was determined, undetermined parameter only was the central coordinate of circle of convex mirror on the cross section of module backlight, and the radius size of convex mirror, is that example describes with the center of circle and the radius that calculates a convex mirror below.
Shown in Fig. 7,8 and 9, given value is initial point O (0,0); The coordinate that convex mirror two edges point C point and E are ordered is designated as C (30 ,-10), E (34 ,-6); This convex mirror the two edges point B point of liquid crystal panel scope of corresponding irradiation and the coordinate that F is ordered, be designated as B (22,0), F (42,0).Light is when O point, C point and the transmission of B point, and the intersection point of normal Y on liquid crystal panel is the A point, be A (u, v).If the length of reflection ray is Z, the distance between the A point B point is X.Index path when at first shining the C point according to scanning light beam calculates, as shown in Figure 7.Angle between incident light and the reverberation is θ 1, and the angle between reverberation and the liquid crystal panel is θ 2.
At first calculate two angles according to following formula:
cosθ1＝(OC
2+BC
2-OB
2)/(20C×BC)
Can calculate θ 1=32.86 °
Similarly can calculate θ 2=128.68 °
Then calculate the A point coordinates according to following formula:
cos(θ1/2)＝(Y
2+Z
2-X
2)/2YZ
cos(θ2)＝(X
2+Z
2-Y
2)/2XZ
Because the length of Z, θ 1 and θ 2 are known, thus can the simultaneous solution equation group, try to achieve the length of X and Y, can calculate the A point coordinates according to the B point coordinates.
Shine the light path that E point back reflection orders to F according to scanning light beam again and calculate, as shown in Figure 8, the intersection point of normal and liquid crystal panel is the D point, is designated as D (i.j).Be similar to the computational methods of A point coordinates, can calculate the D point coordinates.
Calculate in conjunction with above-mentioned two light paths, as shown in Figure 9, the normal of ordering through A intersects at the Q point with the normal of ordering through D, be designated as Q (x, y).The Q point coordinates adopts following equation group to calculate:
(y-v)/(v-(10))=(x-u)/(u-30), line segment A point is to the Q point;
(y-j)/(j-(6))=(x-i)/(i-34), line segment D point is to the Q point.
According to above-mentioned equation group can calculate Q (x, coordinate figure y), i.e. the center of circle of convex mirror, the length of line segment CQ or EQ is radius.
Adopt similar method can calculate the center of circle and the radius of each convex mirror respectively.
For the second embodiment midplane mirror parameter is set specifically, also can set:, adjoin each other and do not overlap so that each flat mirror reflects goes out the illumination range in leaded light chamber such as the center of the angle between each level crossing and the backboard, each level crossing and the interval between the distance between the backboard and/or each level crossing etc. with reference to above computational methods.
Module the 4th embodiment backlight
Figure 10 is the structural representation of the present invention module the 4th embodiment backlight.The difference of present embodiment and the foregoing description is: the quantity of grid seam 3 is eight, is disposed on the grating cover 2, is used for transmiting simultaneously the multi beam scanning light beam.
The quantity of grid seam can be two or more, preferably is disposed on the grating cover equably.When the grid seam was one, grating cover rotated a circle and just can realize that a backlight to liquid crystal panel scans.Usually, the frequency of backlight scanning should be corresponding with vertical sweep frequency on the liquid crystal panel.When grid seam quantity was the n bar, n was a natural number, and then grating cover rotates a circle, and can realize n backlight scanning to liquid crystal panel.The rotary speed that many grid seams can reduce grating cover is set, improves the scan frequency of backlight.
Module unit driving method embodiment backlight
Figure 11 is the flow chart of the present invention module unit driving method embodiment backlight, and this method specifically can adopt the module backlight of the embodiment of the invention to realize, specifically comprises the steps:
For making the scope width unanimity in light ejaculation leaded light chamber, the angle of speculum and backboard can be set, and the interval alternation between speculum, then corresponding, can also drive grating cover and rotate around backlight according to the pace of change of setting.
When grating cover was provided with n bar grid seam, n was a natural number, and then above-mentioned setpoint frequency can equal the ratio of grid seam quantity on liquid crystal panel vertical sweep frequency and the grating cover.
For example, when vertical sweep frequency was 60 hertz (Hz), the frequency of backlight scanning should also equal 60Hz, and the time of promptly rotating a week is about 16.7 milliseconds (ms).When grating cover was provided with n bar grid seam, the rotational frequency of grating cover can be 60/nHz.Therefore can reduce the velocity of rotation of grating cover, thereby reduce the realization difficulty.On the other hand, also can improve the backlight scan frequency, cooperate the requirement of higher vertical sweep frequency.
In the present invention's module unit driving method backlight, driving grating cover in the backlight rotating process, can also drive backlight and light discontinuously or extinguish, backlight is not closed when scanning light beam shines on the speculum, thus saves energy.The interval of lighting and extinguishing can be set according to the backlight scan frequency.
The present invention's module unit driving method backlight can adopt the arbitrary embodiment of the present invention's module backlight to carry out, and can make the LCD slimming, and driving method is simple and easy to realize.
LCD
Figure 12 is the structural representation of LCD embodiment of the present invention, and this LCD comprises module backlight of the present invention, also comprises liquid crystal panel 20 and framework 30.Liquid crystal panel 20 comprises color membrane substrates 22 and the array base palte 21 to box-like one-tenth.Liquid crystal panel 20 and module backlight are embedded in framework 30, and 21 contiguous settings of the array base palte in leaded light chamber 4 and the liquid crystal panel 20, and speculum 5 reflects the scanning light beam in leaded light chamber 4 and injects in the liquid crystal panel 20.
Preferably the center line of backlight 1 and array base palte 21 are at grade.
Adopt module backlight of the present invention can make LCD lightening, and can reduce the quantity of backlight, reduce driving power consumption, save cost.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of programmed instruction, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (15)
1. a module backlight is characterized in that, comprising:
The leaded light chamber, described leaded light chamber comprises backboard;
Backlight is arranged on the side in described leaded light chamber;
Grating cover, be located at the outside of described backlight, described grating cover is provided with at least one grid seams, be used for the transmission backlight and emit beam and form scanning light beam, described grating cover around described backlight rotation so that described scanning light beam move on the backboard that is radiated at described leaded light chamber;
Speculum is arranged on the backboard in described leaded light chamber, and the described scanning light beam that is used for moving irradiation reflects described leaded light chamber.
2. module backlight according to claim 1 is characterized in that: described speculum is a level crossing, and its quantity is one, parallel being sticked on described backboard, and in a side setting that is close to described backlight.
3. module backlight according to claim 1 is characterized in that: described speculum is level crossing or convex mirror, and its quantity is a plurality of, is disposed on the described backboard.
4. module backlight according to claim 3 is characterized in that: have an acute angle between each plane, described level crossing place and the described backboard.
5. module backlight according to claim 3, it is characterized in that: from being close to described backlight to direction away from described backlight, interval gradual change between angle between each described level crossing and the backboard, the center of each described level crossing and the distance between the backboard and/or each the described level crossing adjoins each other and does not overlap so that each flat mirror reflects goes out the illumination range in described leaded light chamber.
6. module backlight according to claim 3 is characterized in that: the convex surface angle of described convex mirror is 90～170 degree.
7. module backlight according to claim 3, it is characterized in that: from being close to described backlight to direction away from described backlight, interval gradual change between the convex surface angle of each described convex mirror, the radius of each described convex mirror and/or each the described convex mirror adjoins each other and does not overlap so that each convex mirror reflects the illumination range in described leaded light chamber.
8. according to the arbitrary described module backlight of claim 1～7, it is characterized in that:
The quantity of described grid seam is two or more, is disposed on the described grating cover, is used for transmiting simultaneously the multi beam scanning light beam.
9. according to the arbitrary described module backlight of claim 1～7, it is characterized in that: described backlight is the electroluminescent light source of strip or point-like, the inorganic EL light source that perhaps described backlight is strip or point-like.
10. according to the arbitrary described module backlight of claim 1～7, it is characterized in that: have a distance between the side in described backlight and described leaded light chamber.
11. a module unit driving method backlight is characterized in that, comprising:
The driving backlight is lighted, and the grid on the grating cover of the light of described backlight emission through being located at the described backlight outside stitch transmission and go out, and form scanning light beam;
Driving described grating cover according to setpoint frequency rotates around described backlight, described backlight side is provided with the leaded light chamber, the leaded light chamber comprises backboard, and described scanning light beam moves and is radiated on the described backboard, and the speculum order-reflected that is provided with on described backboard goes out described leaded light chamber.
12. module unit driving method backlight according to claim 11 is characterized in that: described setpoint frequency equals the ratio of grid seam quantity on liquid crystal panel vertical sweep frequency and the grating cover.
13. module unit driving method backlight according to claim 11 is characterized in that, is driving described grating cover in described backlight rotating process, also comprises: drive described backlight and light discontinuously or extinguish.
14. LCD that comprises the arbitrary described module backlight of claim 1～10, also comprise liquid crystal panel and framework, it is characterized in that: described liquid crystal panel and described module backlight are embedded in described framework, array base palte in described leaded light chamber and the described liquid crystal panel is contiguous to be provided with, and described mirror reflects goes out the scanning light beam in described leaded light chamber and injects in the described liquid crystal panel.
15. LCD according to claim 14 is characterized in that: the center line of described backlight and described array base palte are at grade.
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| CN 200910081209 CN101852362B (en) | 2009-03-30 | 2009-03-30 | Back light module, driving method thereof and liquid crystal display |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013127250A1 (en) * | 2012-02-28 | 2013-09-06 | 天地融科技股份有限公司 | Electronic device |
| CN103775920A (en) * | 2014-01-29 | 2014-05-07 | 京东方科技集团股份有限公司 | Scanning type backlight module and display device |
| KR101878029B1 (en) * | 2015-04-10 | 2018-07-12 | 가부시키가이샤 재팬 디스프레이 | Display device, lighting device, light guide plate and method of manufacturing the same |
| CN108287390A (en) * | 2018-03-30 | 2018-07-17 | 京东方科技集团股份有限公司 | A kind of edge-type light guide plate and its control method, backlight module and display device |
| CN115995221A (en) * | 2023-03-23 | 2023-04-21 | 惠科股份有限公司 | Display device and electronic equipment |
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| WO2003004931A2 (en) * | 2001-06-30 | 2003-01-16 | Samsung Electro-Mechanics Co., Ltd. | Backlight using planar hologram for flat display device |
| CN100405155C (en) * | 2003-12-19 | 2008-07-23 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| CN1982972A (en) * | 2005-12-16 | 2007-06-20 | 群康科技(深圳)有限公司 | Negative-light mould set and liquid-crystal display device therewith |
| CN100590466C (en) * | 2006-10-18 | 2010-02-17 | 财团法人工业技术研究院 | Light conductive board and the backlight module possessing same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013127250A1 (en) * | 2012-02-28 | 2013-09-06 | 天地融科技股份有限公司 | Electronic device |
| CN103775920A (en) * | 2014-01-29 | 2014-05-07 | 京东方科技集团股份有限公司 | Scanning type backlight module and display device |
| CN103775920B (en) * | 2014-01-29 | 2015-12-30 | 京东方科技集团股份有限公司 | A kind of scanning backlight module and display device |
| US9678263B2 (en) | 2014-01-29 | 2017-06-13 | Boe Technology Group Co., Ltd. | Scanning type backlight module and display device |
| KR101878029B1 (en) * | 2015-04-10 | 2018-07-12 | 가부시키가이샤 재팬 디스프레이 | Display device, lighting device, light guide plate and method of manufacturing the same |
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| US10901141B2 (en) | 2015-04-10 | 2021-01-26 | Japan Display Inc. | Display device, lightguide plate, and manufacturing method thereof |
| CN108287390A (en) * | 2018-03-30 | 2018-07-17 | 京东方科技集团股份有限公司 | A kind of edge-type light guide plate and its control method, backlight module and display device |
| CN108287390B (en) * | 2018-03-30 | 2019-08-30 | 京东方科技集团股份有限公司 | A kind of edge-type light guide plate and its control method, backlight module and display device |
| US11391882B2 (en) | 2018-03-30 | 2022-07-19 | Beijing Boe Optoelectronics Technology Co., Ltd. | Optical waveguide element and control method thereof, backlight module and display device |
| CN115995221A (en) * | 2023-03-23 | 2023-04-21 | 惠科股份有限公司 | Display device and electronic equipment |
| CN115995221B (en) * | 2023-03-23 | 2023-06-23 | 惠科股份有限公司 | Display device and electronic equipment |
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