CN101271676A - LCD device, device and method for driving its backlight module - Google Patents
LCD device, device and method for driving its backlight module Download PDFInfo
- Publication number
- CN101271676A CN101271676A CNA2008101007337A CN200810100733A CN101271676A CN 101271676 A CN101271676 A CN 101271676A CN A2008101007337 A CNA2008101007337 A CN A2008101007337A CN 200810100733 A CN200810100733 A CN 200810100733A CN 101271676 A CN101271676 A CN 101271676A
- Authority
- CN
- China
- Prior art keywords
- backlight module
- pixel
- control signal
- district
- back light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The invention provides a liquid crystal display and a drive unit of a backlight module and a drive method thereof. The drive method of the backlight module is suitable for driving at least one backlight unit in the backlight module; the backlight unit provides one side of a light source for a pixel in an N-th area of a liquid crystal display panel; wherein the N is a positive integer. The drive method of the backlight module comprises the following steps: firstly, the time in which the pixel in the N-th area is in a stable state in a frame is calculated; secondly, when the pixel in the N-th area is in the stable state in the frame, a control signal is provided in order to drive the backlight unit. The backlight module drive unit and the drive method provided by the invention can promote a technical effect of inserting a black frame so as to ensure the liquid crystal display adopting the backlight module drive unit and the drive method provided by the invention almost not to produce an image frame having the dynamic afterimage caused due to a liquid crystal state change.
Description
Technical field
The invention relates to a kind of plane display technique, and particularly relevant for a kind of LCD and backlight module driving device and method.
Background technology
The evolution of photoelectricity and semiconductor technology has driven the flourish of flat-panel screens, and in many flat-panel screens, LCD has become the main flow in market immediately because of having advantageous characteristic such as high spatial utilization ratio, low consumpting power, radiationless and low electromagnetic interference (EMI).LCD generally comprises display panels and backlight module, and because display panels itself does not have self luminous characteristic, therefore backlight module must be configured in the display panels below, the area source that provides display panels required is provided, and so LCD could show image.
In the prior art, in order to promote the color saturation of LCD, the dealer is except meeting is set about on the driving circuit of LCD and method, it more can utilize the light-emitting diode (LED) backlight module with higher color purity to replace the known used backlight module that emits white light, though so can promote the color saturation of LCD effectively, relatedly also derive many shortcomings.For the shortcoming that prior art utilizes light-emitting diode (LED) backlight module to derive will conveniently be described, the correlative type of below will arranging in pairs or groups is done explanation.
Fig. 1 illustrates a certain district pixel Pix_n view of known display panels and the control signal BL_CS sequential chart of light-emitting diode (LED) backlight module.Can know from Fig. 1 and to find out, because the control signal BL_CS of light-emitting diode (LED) backlight module can be in the state of running always, so when a certain district pixel Pix_n of described display panels is in transition (that is twill staggered place) in FR image duration (that is time of a vertical synchronizing signal V_SYNC), light-emitting diode (LED) backlight module still can continue the supply-side light source and give display panels (that is the control signal of the control signal of display panels and light-emitting diode (LED) backlight module is irrelevant), and the image frame (frame) that this measure will cause LCD to present produces dynamic ghost (motion blur).
Moreover, because the control signal BL_CS of light-emitting diode (LED) backlight module is generally the pulse wave width modulation signal (PWM signal) of 600 hertz (Hz), so what can know by inference is, the transition frequency of the control signal BL_CS of light-emitting diode (LED) backlight module is compared to frame update rate (the frame rate of LCD, be generally 60Hz) can be relatively for high, to such an extent as to the electromagnetic interference (EMI) that control signal BL_CS caused (the electromagnetic interference of light-emitting diode (LED) backlight module, EMI) intensity can be too high, thereby make the electromagnetic interference (EMI) index of LCD integral body to promote significantly.
Summary of the invention
In view of this, the invention provides a kind of backlight module driving device and method, it not only can suppress the high-intensity electromagnetic interference (EMI) of the mistake that control signal caused of known light-emitting diode (LED) backlight module effectively, and more can improve the possibility that its applied LCD produces the image frame with dynamic ghost significantly.
The present invention proposes a kind of backlight module driving method, and it is suitable for driving at least one back light unit in the backlight module, and this back light unit can supply the N district pixel of an area source feeding LCD panel, and wherein N is a positive integer.Backlight module driving method proposed by the invention comprises the following steps: at first, calculates described N district pixel and is in T.T. of stable state an image duration, uses and learns that described N district pixel is in the center of the T.T. of stable state described image duration.Then, be in the center of the T.T. of stable state according to described N district pixel described image duration, and provide a control signal to drive described back light unit.
According to one embodiment of the invention, backlight module driving method proposed by the invention is more suitable for driving most sub-back light units in the described back light unit, wherein to the i district pixel in the described N district pixel, i is a positive integer to the individual sub-back light unit of i in order to the supply-side light source.Therefore, backlight module driving method proposed by the invention can comprise the following steps: to be in the center of the T.T. of stable state according to described N district pixel described image duration in addition, and provides most sub-control signals to drive a described majority back light unit respectively.
The present invention proposes a kind of backlight module driving device in addition, and it is suitable for driving at least one back light unit in the backlight module, and this back light unit can supply the N district pixel of an area source feeding LCD panel, and wherein N is a positive integer.The backlight module driving device that the present invention proposes comprises computing unit and driver element.Wherein, computing unit is in T.T. of stable state in order to calculate described N district pixel an image duration, uses and learns that described N district pixel is in the center of the T.T. of stable state described image duration.Driver element couples computing unit and backlight module, and it can be in the center of the T.T. of stable state described image duration according to described N district pixel, and provides a control signal to drive described back light unit.
According to one embodiment of the invention, described back light unit has most sub-back light units, and wherein i sub-back light unit is in order to supply an area source to the i district pixel in the described N district pixel, and i is a positive integer.
According to one embodiment of the invention, driver element can be in the center of the T.T. of stable state described image duration according to described N district pixel, and provides most sub-control signals to drive a described majority back light unit respectively.
The present invention proposes a kind of backlight module driving method in addition, and it is suitable for driving at least one back light unit in the backlight module, and this back light unit can supply the N district pixel of an area source feeding LCD panel, and wherein N is a positive integer.Backlight module driving method proposed by the invention comprises the following steps: at first, calculates described N district pixel is in stable state an image duration time.Then, be in the stable state described image duration, provide a control signal to drive described back light unit in described N district pixel.
According to one embodiment of the invention, (N+1) district pixel that the opening time of described control signal does not extend to described N district's pixel and display panels in fact is in the transition.
The present invention proposes a kind of LCD in addition, and it comprises display panels, has the backlight module of at least one back light unit, and the backlight module driving device that the invention described above proposed.
In an embodiment of the invention described above, the open-interval center of the described control signal described N district pixel of can aliging is in the center of the T.T. of stable state described image duration, and (N+1) district pixel that the opening time of described control signal must not extend to described N district's pixel and display panels in fact is in the transition.
In an embodiment of the invention described above, described control signal is the pulse wave width modulation signal.
In an embodiment of the invention described above, the open-interval center of described majority the sub-control signal described N district pixel of can aliging is in the center of the T.T. of stable state described image duration, and the opening time of a described majority control signal must not extend to described N district's pixel and this (N+1) in fact and distinguishes pixel and be in the transition.
In an embodiment of the invention described above, a described majority control signal has the different opening time, and each sub-control signal is the pulse wave width modulation signal.
In an embodiment of the invention described above, described backlight module is a light-emitting diode (LED) backlight module.
Backlight module driving device provided by the present invention and method mainly are that the transition Frequency Design in order to the control signal (that is pulse wave width modulation signal) that drives backlight module is become identical with the frame update rate of LCD, the high-intensity electromagnetic interference (EMI) of the mistake that control signal caused that so not only can suppress light-emitting diode (LED) backlight module, and the control signal of the light-emitting diode (LED) backlight module that more can ease up is to the influence of the electromagnetic interference (EMI) index of LCD integral body.
In addition, because backlight module driving device provided by the present invention and method mainly are the light-emitting diode (LED) backlight modules that is applied in the design of doing subregion control, so when a certain district of display panels pixel is in transition in arbitrary image duration, backlight module driving device provided by the present invention and method be not except the supply-side light source uses to described a certain district pixel, it as far as possible can use for some regional pixel of contiguous described a certain district pixel in the display panels by the supply-side light source yet, can promote the technology effect of black plug frame by this, can not produce the image frame that causes because of the liquid crystal transition with dynamic ghost thereby make the LCD that adopts backlight module driving device provided by the present invention and method be close to.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, several embodiments of the present invention cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 illustrates a certain district pixel status synoptic diagram of known display panels and the control signal sequential chart of light-emitting diode (LED) backlight module.
Fig. 2 is the system block diagrams of an embodiment of LCD of the present invention.
Fig. 3 is the calcspar of an embodiment of backlight module driving device of the present invention.
Fig. 4 is the pixel status synoptic diagram in 5 zones of the display panels that illustrates according to one embodiment of the invention and 5 control signal sequential charts of light-emitting diode (LED) backlight module.
The pixel status synoptic diagram in 4 zones of the display panels that Fig. 5 is according to another embodiment of the present invention to be illustrated and 4 control signal sequential charts of light-emitting diode (LED) backlight module.
Fig. 6 is the system block diagrams of another embodiment of LCD of the present invention.
Fig. 7 illustrates the process flow diagram into an embodiment of backlight module driving method of the present invention.
Fig. 8 illustrates the process flow diagram into another embodiment of backlight module driving method of the present invention.
Drawing reference numeral:
Pix_n: the state of a certain district pixel of display panels
BL_CS: the control signal of known luminescence diode backlight module
BL_CS_1～BL_CS_n: the control signal of light-emitting diode (LED) backlight module of the present invention
BL_CS_1_1/2～BL_CS_n_1/2: the sub-control signal V_SYNC of light-emitting diode (LED) backlight module of the present invention: vertical synchronizing signal
FR: image duration
200: LCD
201: display panels
203: backlight module
205: backlight module driving device
207: time schedule controller
209: gate drivers
211: source electrode driver
201_1～201_n, 201_1_1～201_n_2: the zone of display panels
203_1～203_n: back light unit
203_1_1～203_n_2: sub-back light unit
301: computing unit
303: driver element
S701～S703: each step of process flow diagram of an embodiment of backlight module driving method of the present invention
S801～S803: each step of the process flow diagram of another embodiment of backlight module driving method of the present invention
Embodiment
The present invention can suppress the high-intensity electromagnetic interference (EMI) of the mistake that control signal caused of known light-emitting diode (LED) backlight module effectively, and the image frame that can improve known LCD significantly and presented produces the problem of dynamic ghost.
Fig. 2 is the system block diagrams of an embodiment of LCD of the present invention.Please refer to Fig. 2, LCD 200 comprises in order to the display panels of show image frame (LCD panel) 201, backlight module (present embodiment is to do with light-emitting diode (LED) backlight module to exemplify) 203, backlight module driving device 205, time schedule controller (timing controller) 207, gate drivers (gate driver) 209, and source electrode driver (source driver) 211.
In present embodiment, light-emitting diode (LED) backlight module 203 has multi-region back light unit 203_1～203_n, in order to supply the pixel that an area source is given corresponding display panels 201 in regular turn.In present embodiment, the pixel that back light unit 203_1 mainly can the supply-side light source gives the regional 201_1 of display panels 201; The pixel that back light unit 203_2 mainly can the supply-side light source gives the regional 201_2 of display panels 201, the rest may be inferred mainly can supply the pixel that sub-area source is given the regional 201_n of display panels 201 to back light unit 203_n.Wherein, n is a positive integer.
Definite, suppose that light-emitting diode (LED) backlight module 203 has 4 district back light unit 203_1～203_4 (but being not restricted to this), and the resolution of display panels 201 is the words of 1024*768, display panels 201 will corresponding be divided into the pixel of 4 regional 201_1～201_4 so, and each regional pixel can have 192 sweep traces.
Backlight module driving device 205 couples light-emitting diode (LED) backlight module 203, in order to each the district back light unit 203_1～203_n in the driven for emitting lights diode backlight module 203.Gate drivers 209 is controlled by time schedule controller 207, uses each row pixel (not illustrating) of opening one by one in the display panels 201.Source electrode driver 211 also is controlled by time schedule controller 207, uses the data voltage (or meaning pixel voltage) that provides corresponding and gives the row pixel of being opened by gate drivers 207 in the display panels 201.
What deserves to be mentioned is earlier in this,, and more can make LCD present image frame to watch to the user with dynamic ghost because the control signal of known light-emitting diode (LED) backlight module not only can cause high-intensity electromagnetic interference (EMI).Therefore, the present invention will utilize backlight module driving device 205 to solve these problems, and following content is with the embodiment of detailed explanation backlight module driving device 205.
Fig. 3 is the calcspar of an embodiment of backlight module driving device of the present invention.Please merge with reference to Fig. 2 and Fig. 3, backlight module driving device 205 comprises computing unit 301 and driver element 303, wherein the pixel of each regional 201_1～201_n of computing unit 301 meeting calculating display panels 201 is in the T.T. of stable state an image duration (frame period), and the pixel of using each the regional 201_1～201_n that learns display panels 201 is in the center of the T.T. of stable state an image duration.
For implementation principle of the present invention more clearly is described, in this hypothesis light-emitting diode (LED) backlight module 203, have 5 district back light unit 203_1～203_5, but the present invention is not limited to this odd number numerical value, that is all the other odd number numerical value also can.Therefore, display panels 201 will corresponding be divided into the pixel of 5 regional 201_1～201_5, and wherein 5 district back light unit 203_1～203_5 in the light-emitting diode (LED) backlight module 203 can distinguish the pixel that the supply-side light source is given 5 regional 201_1～201_5 of display panels 201.So based on above-mentioned, Fig. 4 is the pixel status synoptic diagram of 5 regional 201_1～201_5 of the display panels 201 that illustrates according to one embodiment of the invention and 5 control signal BL_CS_1～BL_CS_5 sequential charts of light-emitting diode (LED) backlight module 203.
Please merge with reference to Fig. 2 to Fig. 4, can know from the pixel status of the regional 201_1 of display panels 201 and to find out, the pixel of the regional 201_1 of display panels 201 is in 1/5th among the image duration FR that can occupy T.T. of transition (that is twill staggered place), thus the pixel of the regional 201_1 of display panels 201 be in can occupy the T.T. of stable state among the image duration FR all the other 4/5ths.Thus, computing unit 301 just can calculate display panels 201 regional 201_1 pixel in one image duration FR be in the T.T. of stable state (that is non-twill staggered place), and learn according to this display panels 201 regional 201_1 pixel in an image duration center that FR is in the T.T. of stable state can drop on one image duration FR 3/5 place.
In addition, can know from the pixel status of the regional 201_2 of display panels 201 and to find out, the pixel of the regional 201_2 of display panels 201 is in 1/5th among the image duration FR that still can occupy T.T. of transition, thus the pixel of the regional 201_2 of display panels 201 be in still can occupy the T.T. of stable state among the image duration FR all the other 4/5ths.Also also because of like this, computing unit 301 just can calculate display panels 201 regional 201_2 pixel in one image duration FR be in the T.T. of stable state, and learn according to this display panels 201 regional 201_2 pixel in an image duration center that FR is in the T.T. of stable state can drop on one image duration FR 4/5 place.
Moreover, can know from the pixel status of the regional 201_3 of display panels 201 and to find out, among the pixel of the regional 201_3 of display panels 201 has been in still can occupying T.T. of the transition image duration FR 1/5th, thus the pixel of the regional 201_3 of display panels 201 be in still can occupy the T.T. of stable state among the image duration FR all the other 4/5ths.Also also because of like this, computing unit 301 just can calculate display panels 201 regional 201_3 pixel in one image duration FR be in the T.T. of stable state, and learn according to this display panels 201 regional 201_3 pixel in an image duration center that FR is in the T.T. of stable state can drop on one image duration FR 5/5 place.
In addition, can know from the pixel status of the regional 201_4 of display panels 201 and to find out, the pixel of the regional 201_4 of display panels 201 is in 1/5th among the image duration FR that still can occupy T.T. of transition, thus the pixel of the regional 201_4 of display panels 201 be in still can occupy the T.T. of stable state among the image duration FR all the other 4/5ths.Also also because of like this, computing unit 301 just can calculate display panels 201 regional 201_4 pixel in one image duration FR be in the T.T. of stable state, and learn according to this display panels 201 regional 201_4 pixel in an image duration center that FR is in the T.T. of stable state can drop on one image duration FR 1/5 place.
At last, can know from the pixel status of the regional 201_5 of display panels 201 and to find out, the pixel of the regional 201_5 of display panels 201 is in 1/5th among the image duration FR that still can occupy T.T. of transition, thus the pixel of the regional 201_5 of display panels 201 be in still can occupy the T.T. of stable state among the image duration FR all the other 4/5ths.Also also because of like this, computing unit 301 just can calculate display panels 201 regional 201_5 pixel in one image duration FR be in the T.T. of stable state, and learn according to this display panels 201 regional 201_5 pixel in an image duration center that FR is in the T.T. of stable state can drop on one image duration FR 2/5 place.
Based on foregoing, since computing unit 301 learnt display panels 201 each regional 201_1～201_5 pixel in one image duration FR be in the T.T. of stable state the center (that is drop on respectively one image duration FR 3/5,4/5,5/5,1/5 and 2/5 place), so driver element 303 will provide control signal BL_CS_1～BL_CS_5 with each the district back light unit 203_1～203_5 in the driven for emitting lights diode backlight module 203 respectively according to this.Wherein, the open-interval center of control signal BL_CS_1～BL_CS_5 can align respectively display panels 201 each regional 201_1～201_5 pixel in one image duration FR be in the center of the T.T. of stable state, and each control signal BL_CS_1～BL_CS_5 is all and has identical open-interval pulse wave width modulation signal (PWMsignal).
For instance, the open-interval center of control signal BL_CS_1 can align display panels 201 regional 201_1 pixel in one image duration FR be in the center of the T.T. of stable state; The open-interval center of control signal BL_CS_2 can align display panels 201 regional 201_2 pixel in one image duration FR be in the center of the T.T. of stable state; The rest may be inferred to the open-interval center of control signal BL_CS_5 can align display panels 201 regional 201_5 pixel in one image duration FR be in the center of the T.T. of stable state.
Then, please continue again with reference to Fig. 4, from Fig. 4, can learn easily, because the pixel of each regional 201_1～201_5 of display panels 201 is in the process of transition, its pairing respectively back light unit 203_1～203_5 can't supply any area source, and this measure not only can realize the technological means of black plug frame, and can also make the LCD 200 of present embodiment more can not produce the image frame with dynamic ghost to watch to the user.
In order further to promote the technology effect of black plug frame, the opening time of the control signal BL_CS_1 that the driver element 303 of present embodiment is provided tries not to extend to the regional 201_1 of display panels 201 and the pixel of 201_2 is in the transition.Similarly, the opening time of the control signal BL_CS_2 that provided of driver element 303 also tries not to extend to the regional 201_2 of display panels 201 and the pixel of 201_3 is in the transition.
In addition, the opening time of the control signal BL_CS_3 that provided of driver element 303 also tries not to extend to the regional 201_3 of display panels 201 and the pixel of 201_4 is in the transition; And the opening time of the control signal BL_CS_4 that driver element 303 is provided also tries not to extend to the regional 201_4 of display panels 201 and the pixel of 201_5 is in the transition.Yet, because display panels 201 only has the pixel of 5 regional 201_1～201_5,, is not in the transition opening time of the control signal BL_CS_5 that driver element 303 is provided so needing only the pixel that does not extend to the regional 201_5 of display panels 201 as far as possible.
Because the pixel of each regional 201_1～201_5 of display panels 201 is being carried out in the transition, neither meeting be subjected to its pairing back light unit with and the influence of adjacent back light unit, watch to the user so the LCD 200 of present embodiment just more can not produce the image frame with dynamic ghost.In addition, because the transition frequency of arbitrary control signal BL_CS_1～BL_CS_5 that driver element 303 is provided all can be identical with the frame update rate of LCD 200, so the intensity of the electromagnetic interference (EMI) that it caused can't be too high.Also also because of like this, the control signal BL_CS_1 of light-emitting diode (LED) backlight module 203～BL_CS_5 can ease up to the influence of the electromagnetic interference (EMI) index of LCD 200 integral body.
So far, by the above-mentioned embodiment that exemplifies as can be seen, backlight module driving device of the present invention can be in the center of the T.T. of stable state according to each regional pixel of display panels an image duration, is in preferred embodiment of the present invention and control signal is provided with each the district's back light unit in the driven for emitting lights diode backlight module respectively, but is not restricted to this according to spirit of the present invention.
In another embodiment of the present invention; backlight module driving device of the present invention is so long as be in the stable state an image duration in each regional pixel of display panels; provide control signal to get final product (for example will go up the described center of an embodiment and do displacement slightly) with each the district's back light unit in the difference driven for emitting lights diode backlight module; but the opening time of control signal in fact still tries not to extend to pixel and is in the transition, and these technology also belong among the category of institute of the present invention desire protection.
Moreover, the foregoing description is that the pixel that is divided into odd number (for example 5) zone with display panels 201 is that example is done explanation, but be not restricted to this according to spirit of the present invention, the pixel that following content will be again be divided into the even number zone at display panels 201 is that example is done explanation.
In this hypothesis light-emitting diode (LED) backlight module 203, have 4 district back light unit 203_1～203_4, but the present invention is not restricted to this even number numerical value, that is all the other even number numerical value also can.Therefore, display panels 201 can corresponding be divided into the pixel of 4 regional 201_1～201_4, and wherein 4 district back light unit 203_1～203_4 in the light-emitting diode (LED) backlight module 203 can distinguish the pixel that the supply-side light source is given 4 regional 201_1～201_4 of display panels 201.
Based on foregoing, the pixel status synoptic diagram of 4 regional 201_1～201_4 of the display panels 201 that Fig. 5 is according to another embodiment of the present invention to be illustrated and 4 control signal BL_CS_1～BL_CS_4 sequential charts of light-emitting diode (LED) backlight module 203.Please merge with reference to Fig. 2, Fig. 3 and Fig. 5, can know from the pixel status of the regional 201_1 of display panels 201 and to find out, the pixel of the regional 201_1 of display panels 201 is in 1/4th among the image duration FR that can occupy T.T. of transition (that is twill staggered place), thus the pixel of the regional 201_1 of display panels 201 be in can occupy the T.T. of stable state among the image duration FR all the other 3/4ths.Also also because of like this, computing unit 301 just can calculate display panels 201 regional 201_1 pixel in one image duration FR be in the T.T. of stable state (that is non-twill staggered place), and learn according to this display panels 201 regional 201_1 pixel in an image duration center that FR is in the T.T. of stable state can drop on one image duration FR 5/8 place.
Can know from the pixel status of the regional 201_2 of display panels 201 and to find out, the pixel of the regional 201_2 of display panels 201 is in 1/4th among the image duration FR that still can occupy T.T. of transition, thus the pixel of the regional 201_2 of display panels 201 be in still can occupy the T.T. of stable state among the image duration FR all the other 3/4ths.Thus, computing unit 301 just can calculate display panels 201 regional 201_2 pixel in one image duration FR be in the T.T. of stable state, and learn according to this display panels 201 regional 201_2 pixel in an image duration center that FR is in the T.T. of stable state can drop on one image duration FR 7/8 place.
Moreover, can know from the pixel status of the regional 201_3 of display panels 201 and to find out, among the pixel of the regional 201_3 of display panels 201 has been in still can occupying T.T. of the transition image duration FR 1/4th, thus the pixel of the regional 201_3 of display panels 201 be in still can occupy the T.T. of stable state among the image duration FR all the other 3/4ths.Also also because of like this, computing unit 301 just can calculate display panels 201 regional 201_3 pixel in one image duration FR be in the T.T. of stable state, and learn according to this display panels 201 regional 201_3 pixel in an image duration center that FR is in the T.T. of stable state can drop on one image duration FR 1/8 place.
At last, can know from the pixel status of the regional 201_4 of display panels 201 and to find out, the pixel of the regional 201_4 of display panels 201 is in 1/4th among the image duration FR that still can occupy T.T. of transition, thus the pixel of the regional 201_4 of display panels 201 be in still can occupy the T.T. of stable state among the image duration FR all the other 3/4ths.Thus, computing unit 301 just can calculate display panels 201 regional 201_4 pixel in one image duration FR be in the T.T. of stable state, and learn according to this display panels 201 regional 201_4 pixel in an image duration center that FR is in the T.T. of stable state can drop on one image duration FR 3/8 place.
Based on above-mentioned explanation, since computing unit 301 learnt display panels 201 each regional 201_1～201_4 pixel in one image duration FR be in the T.T. of stable state the center (that is drop on respectively one image duration FR 5/8,7/8,1/8 and 3/8 place), so driver element 303 will provide control signal BL_CS_1～BL_CS_4 with each the district back light unit 203_1～203_4 in the driven for emitting lights diode backlight module 203 respectively according to this.Wherein, the open-interval center of control signal BL_CS_1～BL_CS_4 can align respectively display panels 201 each regional 201_1～201_4 pixel in one image duration FR be in the center of the T.T. of stable state, and each control signal BL_CS_1～BL_CS_4 is all and has identical open-interval pulse wave width modulation signal.
For instance, the open-interval center of control signal BL_CS_1 can align display panels 201 regional 201_1 pixel in one image duration FR be in the center of the T.T. of stable state; The open-interval center of control signal BL_CS_2 can align display panels 201 regional 201_2 pixel in one image duration FR be in the center of the T.T. of stable state; The rest may be inferred to the open-interval center of control signal BL_CS_4 can align display panels 201 regional 201_4 pixel in one image duration FR be in the center of the T.T. of stable state.
Then, please continue with reference to Fig. 5, from Fig. 5, can learn easily, because the pixel of each regional 201_1～201_4 of display panels 201 is in the process of transition, its pairing respectively back light unit 203_1～203_4 can't supply any area source, and this measure not only can realize the technological means of black plug frame, and can also make the LCD 200 of present embodiment more can not produce the image frame with dynamic ghost to watch to the user.
In order further to promote the technology effect of black plug frame, the opening time of the control signal BL_CS_1 that the driver element 303 of present embodiment is provided tries not to extend to the regional 201_1 of display panels 201 and the pixel of 201_2 is in the transition.Similarly, the opening time of the control signal BL_CS_2 that provided of driver element 303 also tries not to extend to the regional 201_2 of display panels 201 and the pixel of 201_3 is in the transition.
In addition, the opening time of the control signal BL_CS_3 that provided of driver element 303 also tries not to extend to the regional 201_3 of display panels 201 and the pixel of 201_4 is in the transition.Yet, because display panels 201 only has the pixel of 4 regional 201_1～201_4,, is not in the transition opening time of the control signal BL_CS_4 that driver element 303 is provided so needing only the pixel that does not extend to the regional 201_4 of display panels 201 as far as possible.
Because the pixel of each regional 201_1～201_4 of display panels 201 is being carried out in the transition, neither meeting be subjected to its pairing back light unit with and the influence of adjacent back light unit, watch to the user so the LCD 200 of present embodiment just more can not produce the image frame with dynamic ghost.In addition, because the transition frequency of arbitrary control signal BL_CS_1～BL_CS_4 that driver element 303 is provided all can be identical with the frame update rate of LCD 200, so the intensity of the electromagnetic interference (EMI) that it caused can't be too high.Also also because of like this, the control signal BL_CS_1 of light-emitting diode (LED) backlight module 203～BL_CS_4 can ease up to the influence of the electromagnetic interference (EMI) index of LCD 200 integral body.
Yet,, do not limit to the embodiment of the foregoing description according to spirit of the present invention.In of the present invention another implemented, each district back light unit 203_1～203_n in the light-emitting diode (LED) backlight module 203 all has a plurality of sub-back light units, and (it illustrates as Fig. 6, and for example be 2, but be not restricted to this, can change according to the actual design demand), that is back light unit 203_1 has 2 sub-back light unit 203_1_1 and 203_1_2; Back light unit 203_2 has 2 sub-back light unit 203_2_1 and 203_2_2; The rest may be inferred has 2 sub-back light unit 203_n_1 and 203_n_2 to back light unit 203_n.
So, the sub-back light unit 203_1_1 pixel of mainly can the supply-side light source giving the regional 201_1_1 of display panels 201; The pixel that sub-back light unit 203_1_2 mainly can the supply-side light source gives the regional 201_1_2 of display panels 201; The pixel that the rest may be inferred mainly can the supply-side light source gives the regional 201_n_1 of display panels 201 to sub-back light unit 203_n_1; The pixel that sub-back light unit 203_n_2 mainly can the supply-side light source gives the regional 201_n_2 of display panels 201.
In present embodiment, because each the district back light unit 203_1～203_n in the light-emitting diode (LED) backlight module 203 all has 2 sub-back light units, so the backlight module driving device 205 of present embodiment just must have the ability to drive each the sub-back light unit among each district back light unit 203_1～203_n.Therefore, the driver element 303 of present embodiment also can be in the center of the T.T. of stable state according to the pixel of the regional 201_1_1～201_n_2 of display panels 201 an image duration, and provide most sub-control signal BL_CS_1_1/2～BL_CS_n_1/2 with each the sub-back light unit 203_1_1～203_n_2 in the difference driven for emitting lights diode backlight module 203, so also can reach technology effect same as the previously described embodiments.
What deserves to be mentioned is that the open-interval center of the sub-control signal that the sub-back light unit in same district of present embodiment receives respectively its pairing district pixel of still can aliging is in the center of the T.T. of stable state an image duration.For instance, sub-back light unit 203_1_1 and 203_1_2 can the align pixel of the regional 201_1_1 of display panels 201 and 201_1_2 of the open-interval center of the sub-control signal BL_CS_1_1/2 that receives respectively be in the center of the T.T. of stable state an image duration.
Sub-back light unit 203_2_1 and 203_2_2 can the align pixel of regional 201_2_1 and 201_2_2 of display panels 201 of the open-interval center of the sub-control signal BL_CS_2_1/2 that receives respectively be in the center of the T.T. of stable state an image duration, the rest may be inferred to sub-back light unit 203_n_1 and 203_n_2 respectively can the align pixel of the regional 201_n_1 of display panels 201 and 201_n_2 of the open-interval center of the sub-control signal BL_CS_n_1/2 of reception be in the center of the T.T. of stable state an image duration.
In addition, sub-back light unit 203_1_1 and 203_1_2 opening time of the sub-control signal BL_CS_1_1/2 that receives respectively also try not to extend to the regional 201_1 of display panels 201 and the pixel of 201_2 is in the transition, but sub-back light unit 203_1_1 and 203_1_2 the opening time of the sub-control signal BL_CS_1_1/2 of reception can be different respectively.
Similarly, sub-back light unit 203_2_1 and 203_2_2 opening time of the sub-control signal BL_CS_2_1/2 that receives respectively also try not to extend to the regional 201_2 of display panels 201 and the pixel of 201_3 is in the transition, but sub-back light unit 203_2_1 and 203_2_2 the opening time of the sub-control signal BL_CS_2_1/2 of reception can be different respectively; The opening time of the sub-control signal BL_CS_n_1/2 that the rest may be inferred receives respectively to sub-back light unit 203_n_1 and the 203_n_2 institute pixel of also trying not to extend to the regional 201_n of display panels 201 is in and gets final product in the transition, still sub-back light unit 203_n_1 and 203_n_2 the opening time of the sub-control signal BL_CS_n_1/2 of reception can be different respectively.
In view of the above, because the transition frequency of the control signal (that is pulse wave width modulation signal) that backlight module driving device of the present invention provided can be identical with the frame update rate of LCD, this measure not only can suppress the high-intensity electromagnetic interference (EMI) of the mistake that control signal caused of light-emitting diode (LED) backlight module, and the control signal of the light-emitting diode (LED) backlight module that can also ease up is to the influence of the electromagnetic interference (EMI) index of LCD integral body.
In addition, because backlight module driving device of the present invention mainly is the light-emitting diode (LED) backlight module that is applied in the design of doing subregion control, so when a certain district of display panels pixel is in transition in arbitrary image duration, backlight module driving device provided by the present invention is not except the supply-side light source uses to described a certain district pixel, it as far as possible can use for some regional pixel of contiguous described a certain district pixel in the display panels by the supply-side light source yet, the technology effect of black plug frame can be promoted by this, image frame can be produced with dynamic ghost thereby make LCD not be close to.
Moreover, according to the content that the foregoing description disclosed, below will converge and put in order out at least two kinds of backlight module driving methods and consider and examine for the person skilled of this area.Fig. 7 illustrates the process flow diagram into an embodiment of backlight module driving method of the present invention.Please refer to Fig. 7, the backlight module driving method of present embodiment is suitable for driving at least one back light unit in the backlight module, and this back light unit can be supplied the N district pixel of an area source feeding LCD panel, and wherein N is a positive integer, and this backlight module is a light-emitting diode (LED) backlight module.
The backlight module driving method of present embodiment comprises the following steps: at first, as described in step S701, the N district pixel of calculating display panels is in T.T. of stable state an image duration, uses the N district pixel of learning display panels is in the T.T. of stable state an image duration center.Then, as described in step S703, be in the center of the T.T. of stable state according to the N district pixel of display panels an image duration, and provide a control signal to drive described back light unit.
In present embodiment, the open-interval center of the described control signal described N district pixel of can aliging is in the center of the T.T. of stable state described image duration, and (N 10) district pixel that the opening time of described control signal does not extend to described N district's pixel and display panels as far as possible is in the transition.Wherein, described control signal is the pulse wave width modulation signal.
In addition, the backlight module driving method of present embodiment is more suitable for driving most sub-back light units in the described back light unit, and wherein to the i district pixel in the described N district pixel, i is a positive integer to the individual sub-back light unit of i in order to the supply-side light source.Therefore, the backlight module driving method of present embodiment more can be in the center of the T.T. of stable state described image duration according to described N district pixel, and provides most sub-control signals to drive a described majority back light unit respectively.
In present embodiment, the open-interval center of described majority the sub-control signal described N district pixel of can aliging is in the center of the T.T. of stable state described image duration, and the opening time of a described majority control signal does not extend to described N district's pixel and this (N+1) as far as possible and distinguishes pixel and be in the transition.Wherein, a described majority control signal has the different opening time, and each sub-control signal is the pulse wave width modulation signal.
Fig. 8 illustrates the process flow diagram into another embodiment of backlight module driving method of the present invention.Please refer to Fig. 8, the backlight module driving method of present embodiment is suitable for driving at least one back light unit in the backlight module, and this back light unit can be supplied the N district pixel of an area source feeding LCD panel, and wherein N is a positive integer, and this backlight module is a light-emitting diode (LED) backlight module.
The backlight module driving method of present embodiment comprises the following steps: at first, as described in step S801, calculates described N district pixel is in stable state an image duration time.Then, as described in step S803, be in the stable state described image duration, provide a control signal to drive described back light unit in described N district pixel.In present embodiment, N district pixel and (N+1) district pixel that the opening time of described control signal tries not to extend to display panels are in the transition.
In sum, backlight module driving device provided by the present invention and method mainly are that the transition Frequency Design in order to the control signal (that is pulse wave width modulation signal) that drives backlight module is become identical with the frame update rate of LCD, the high-intensity electromagnetic interference (EMI) of the mistake that control signal caused that so not only can suppress light-emitting diode (LED) backlight module, and the control signal of the light-emitting diode (LED) backlight module that more can ease up is to the influence of the electromagnetic interference (EMI) index of LCD integral body.
Because backlight module driving device provided by the present invention and method mainly are the light-emitting diode (LED) backlight modules that is applied in the design of doing subregion control, so when a certain district of display panels pixel is in transition in arbitrary image duration, backlight module driving device provided by the present invention and method be not except the supply-side light source uses to described a certain district pixel, it as far as possible can use for some regional pixel of contiguous described a certain district pixel in the display panels by the supply-side light source yet, the technology effect of black plug frame can be promoted by this, image frame can be produced with dynamic ghost thereby make the LCD that adopts backlight module driving device provided by the present invention and method not be close to.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is when being as the criterion that right requires to be defined.
Claims (26)
1. backlight module driving method, be suitable for driving at least one back light unit in the backlight module, described back light unit is supplied the N district pixel that an area source is given a display panels, and N is a positive integer, it is characterized in that described backlight module driving method comprises the following steps:
Calculate described N district pixel and be in T.T. of stable state, use and learn that described N district pixel is in the center of the T.T. of stable state described image duration an image duration; And
Be in the center of the T.T. of stable state according to described N district pixel described image duration, and provide a control signal to drive described back light unit.
2. backlight module driving method as claimed in claim 1, it is characterized in that, the open-interval center of the described control signal described N district pixel of aliging is in the center of the T.T. of stable state described image duration, and one (N+1) district pixel that the opening time of described control signal does not extend to described N district's pixel and described display panels in fact is in the transition.
3. backlight module driving method as claimed in claim 2 is characterized in that, described control signal is a pulse wave width modulation signal.
4. backlight module driving method as claimed in claim 1 is suitable for driving most sub-back light units in the described back light unit, it is characterized in that described backlight module driving method comprises the following steps: in addition
Be in the center of the T.T. of stable state described image duration according to described N district pixel, and provide most sub-control signals to drive described this a little back light unit respectively, wherein i sub-back light unit is in order to supply an area source to the i district pixel in the described N district pixel, and i is a positive integer.
5. backlight module driving method as claimed in claim 4, it is characterized in that, the open-interval center of described this a little control signal described N district pixel of aliging is in the center of the T.T. of stable state described image duration, and the opening time of described this a little control signal does not extend to described N district's pixel in fact and described (N+1) district pixel is in the transition.
6. backlight module driving method as claimed in claim 4 is characterized in that, described this a little control signal has the different opening time, and each sub-control signal is a pulse wave width modulation signal.
7. backlight module driving method as claimed in claim 1 is characterized in that, described backlight module is a light-emitting diode (LED) backlight module.
8. backlight module driving device, be suitable for driving at least one back light unit in the backlight module, described back light unit is supplied the N district pixel that an area source is given a display panels, and N is a positive integer, it is characterized in that described backlight module driving device comprises:
One computing unit is in T.T. of stable state in order to calculate described N district pixel an image duration, uses and learns that described N district pixel is in the center of the T.T. of stable state described image duration; And
One driver element couples described computing unit and described backlight module, is in the center of the T.T. of stable state according to described N district pixel described image duration, and provides a control signal to drive described back light unit.
9. backlight module driving device as claimed in claim 8, it is characterized in that, the open-interval center of the described control signal described N district pixel of aliging is in the center of the T.T. of stable state described image duration, and one (N+1) district pixel that the opening time of described control signal does not extend to described N district's pixel and described display panels in fact is in the transition.
10. backlight module driving device as claimed in claim 9 is characterized in that, described control signal is a pulse wave width modulation signal.
11. backlight module driving device as claimed in claim 8 is characterized in that, described back light unit has most sub-back light units, and i sub-back light unit give i district pixel in the described N district pixel in order to supply an area source, and i is a positive integer.
12. backlight module driving device as claimed in claim 11, it is characterized in that, described driver element is to be in the center of the T.T. of stable state according to described N district pixel described image duration, and provides most sub-control signals to drive described this a little back light unit respectively.
13. backlight module driving device as claimed in claim 12, it is characterized in that, the open-interval center of described this a little control signal described N district pixel of aliging is in the center of the T.T. of stable state described image duration, and the opening time of described this a little control signal does not extend to described N district's pixel in fact and described (N+1) district pixel is in the transition.
14. backlight module driving device as claimed in claim 13 is characterized in that, described this a little control signal has the different opening time, and each sub-control signal is a pulse wave width modulation signal.
15. backlight module driving device as claimed in claim 8 is characterized in that, described backlight module is a light-emitting diode (LED) backlight module.
16. a LCD is characterized in that, described LCD comprises:
One display panels;
One backlight module has at least one back light unit, and described back light unit is supplied the N district pixel that an area source is given described display panels, and wherein N is a positive integer; And
One backlight module driving device couples described backlight module, is in the center of the T.T. of stable state according to described N district pixel an image duration, and provides a control signal to drive described back light unit.
17. LCD as claimed in claim 16 is characterized in that, described backlight module driving device comprises:
One computing unit is in T.T. of stable state in order to calculate described N district pixel described image duration, uses and learns that described N district pixel is in the center of the T.T. of stable state described image duration; And
One driver element couples described computing unit and described backlight module, is in the center of the T.T. of stable state according to described N district pixel described image duration, and provides described control signal to drive described back light unit.
18. LCD as claimed in claim 17, it is characterized in that, the open-interval center of the described control signal described N district pixel of aliging is in the center of the T.T. of stable state described image duration, and one (N+1) district pixel that the opening time of described control signal does not extend to described N district's pixel and described display panels in fact is in the transition.
19. LCD as claimed in claim 18 is characterized in that, described control signal is a pulse wave width modulation signal.
20. LCD as claimed in claim 17 is characterized in that, described back light unit has most sub-back light units, and i sub-back light unit give i district pixel in the described N district pixel in order to supply an area source, and i is a positive integer.
21. LCD as claimed in claim 20, it is characterized in that, described driver element is to be in the center of the T.T. of stable state according to described N district pixel described image duration, and provides most sub-control signals to drive described this a little back light unit respectively.
22. LCD as claimed in claim 21, it is characterized in that, the open-interval center of described this a little control signal described N district pixel of aliging is in the center of the T.T. of stable state described image duration, and the opening time of described this a little control signal does not extend to described N district's pixel in fact and described (N+1) district pixel is in the transition.
23. LCD as claimed in claim 22 is characterized in that, described this a little control signal has the different opening time, and each sub-control signal is a pulse wave width modulation signal.
24. LCD as claimed in claim 16 is characterized in that, described backlight module is a light-emitting diode (LED) backlight module.
25. backlight module driving method, be suitable for driving at least one back light unit in the backlight module, described back light unit is supplied the N district pixel that an area source is given a display panels, and N is a positive integer, it is characterized in that described backlight module driving method comprises the following steps:
Calculate described N district pixel and be in time of stable state an image duration; And
Be in the stable state described image duration in described N district pixel, provide a control signal to drive described back light unit.
26. backlight module driving method as claimed in claim 25 is characterized in that, one (N+1) district pixel that the opening time of described control signal does not extend to described N district's pixel and described display panels in fact is in the transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101007337A CN101271676B (en) | 2008-05-20 | 2008-05-20 | LCD device, device and method for driving its backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101007337A CN101271676B (en) | 2008-05-20 | 2008-05-20 | LCD device, device and method for driving its backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101271676A true CN101271676A (en) | 2008-09-24 |
| CN101271676B CN101271676B (en) | 2010-07-07 |
Family
ID=40005600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101007337A Active CN101271676B (en) | 2008-05-20 | 2008-05-20 | LCD device, device and method for driving its backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101271676B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102693702A (en) * | 2011-03-21 | 2012-09-26 | 宏碁股份有限公司 | Liquid crystal display apparatus and driving method thereof |
| WO2014000323A1 (en) * | 2012-06-28 | 2014-01-03 | 深圳市华星光电技术有限公司 | Edge-lit backlight module and scanning method therefor |
| CN104103243A (en) * | 2013-04-01 | 2014-10-15 | 鸿富锦精密工业(武汉)有限公司 | High-definition liquid crystal display screen display control system and method |
| TWI475553B (en) * | 2013-04-29 | 2015-03-01 | Wistron Corp | Backlight control module and backlight control method |
| CN105489170A (en) * | 2014-09-16 | 2016-04-13 | 青岛海信电器股份有限公司 | Backlight source drive method and device, and display equipment |
| CN106373530A (en) * | 2016-09-29 | 2017-02-01 | 北京奇艺世纪科技有限公司 | Control method and device of backlight of display screen |
| WO2019061654A1 (en) * | 2017-09-26 | 2019-04-04 | 武汉华星光电技术有限公司 | Driving method and system for liquid crystal display, and computer-readable medium |
| CN110890060A (en) * | 2018-09-10 | 2020-03-17 | 乐金显示有限公司 | Display device with black image insertion function |
-
2008
- 2008-05-20 CN CN2008101007337A patent/CN101271676B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102693702A (en) * | 2011-03-21 | 2012-09-26 | 宏碁股份有限公司 | Liquid crystal display apparatus and driving method thereof |
| WO2014000323A1 (en) * | 2012-06-28 | 2014-01-03 | 深圳市华星光电技术有限公司 | Edge-lit backlight module and scanning method therefor |
| CN104103243A (en) * | 2013-04-01 | 2014-10-15 | 鸿富锦精密工业(武汉)有限公司 | High-definition liquid crystal display screen display control system and method |
| CN104103243B (en) * | 2013-04-01 | 2016-06-22 | 鸿富锦精密工业(武汉)有限公司 | high-definition liquid crystal screen control display system and method |
| TWI475553B (en) * | 2013-04-29 | 2015-03-01 | Wistron Corp | Backlight control module and backlight control method |
| CN105489170A (en) * | 2014-09-16 | 2016-04-13 | 青岛海信电器股份有限公司 | Backlight source drive method and device, and display equipment |
| CN106373530A (en) * | 2016-09-29 | 2017-02-01 | 北京奇艺世纪科技有限公司 | Control method and device of backlight of display screen |
| WO2019061654A1 (en) * | 2017-09-26 | 2019-04-04 | 武汉华星光电技术有限公司 | Driving method and system for liquid crystal display, and computer-readable medium |
| US10446089B2 (en) | 2017-09-26 | 2019-10-15 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Method, system and computer readable storage medium for driving liquid crystal displays |
| CN110890060A (en) * | 2018-09-10 | 2020-03-17 | 乐金显示有限公司 | Display device with black image insertion function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101271676B (en) | 2010-07-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101271676B (en) | LCD device, device and method for driving its backlight module | |
| US10013940B2 (en) | Method and apparatus to reduce panel power through horizontal interlaced addressing | |
| US7764266B2 (en) | Method and system for controlling an active matrix display device | |
| TW200629208A (en) | Display control circuit, display control method, and liquid crystal display device | |
| KR102583828B1 (en) | Liquid crystal display apparatus and method of driving the same | |
| KR101761884B1 (en) | Display apparatus and method of driving the same | |
| CN102013232B (en) | Method of dimming a light source and display apparatus for performing the method | |
| CN101131505A (en) | Liquid crystal display and driving method thereof | |
| KR101084260B1 (en) | Display device and operating method thereof | |
| KR101266721B1 (en) | Liquid Crystal Display Device and Driving Method thereof | |
| WO2009094458A1 (en) | System and method for backlight control for an electronic display | |
| CN102789769B (en) | Three-dimensional (3D) liquid crystal display driving method and 3D liquid crystal display system | |
| CN103348405B (en) | Display device and driving method | |
| KR102370331B1 (en) | Display apparatus and method of driving the same | |
| CN101315473B (en) | Crystal display device and driving method thereof | |
| CN102006696B (en) | Light-emitting diode backlight drive circuit, method and constant current source thereof | |
| CN107293257A (en) | Display panel, its display methods and display device | |
| US20070262733A1 (en) | Control method and control driving device for backlight module | |
| CN101727862A (en) | Method of driving a light source, light source apparatus and display apparatus having the light source apparatus | |
| CN102473386A (en) | Image display device | |
| US20160217754A1 (en) | Display device and driving method thereof | |
| CN116030768A (en) | Light-emitting substrate, driving method thereof and display device | |
| US20120236048A1 (en) | Liquid crystal display and controller and driving method of panel thereof | |
| CN101424805A (en) | Method for driving LCD device | |
| TWI396165B (en) | Lcd and backlight module driving device and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |