CN103839506A - Display device and drive circuit thereof, driving method of display panel, and display system - Google Patents
Display device and drive circuit thereof, driving method of display panel, and display system Download PDFInfo
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- CN103839506A CN103839506A CN201210473330.3A CN201210473330A CN103839506A CN 103839506 A CN103839506 A CN 103839506A CN 201210473330 A CN201210473330 A CN 201210473330A CN 103839506 A CN103839506 A CN 103839506A
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Abstract
The invention relates to a display device and a drive circuit thereof, a driving method of a display panel, and a display system. The display device comprises a time schedule controller and a data drive circuit. The time schedule controller outputs first pixel data according to input pixel data, wherein the color depth of the first pixel data is a first digit or a second digit less than the first digit. The data drive circuit receives the first pixel data and a notification signal; according to the notification signal, when the color depth of the first pixel data is the second digit, mapping is carried out on the first pixel data to generate second pixel data; and when the color depth of the first pixel data is the first digit, the first pixel data are direct used as the second pixel data and at least one drive voltage is generated based on the second pixel data, wherein the color depth of the second pixel data is the first digit.
Description
Technical field
The invention relates to a kind of electronic installation, and relate to especially the driving method of a kind of display device and data drive circuit and display panel.
Background technology
The color depth (color depth) of the pixel data of display device input is fixing figure place traditionally, for example 6 (bits), then drive display panel by data drive circuit.In the time that the figure place (color depth) of pixel data is higher, the picture color effect showing is also more careful better.
But user, in the time appreciating dynamic menu, does not just need the pixel data of seniority.With regard to dynamic menu, because picture is changing always, the difference of picture color resolution (for example 6bits and 8bits) cannot be discovered or can not noted to human eye.Compared to tableaux, be for example to see colour picture, the color-resolution of 6bit pixel data feels it is very large difference with the color-resolution of 8bit pixel data to human eye.In addition, in the time that the pixel data of seniority is transmitted/processed to display device, the data volume of required internal transmission is larger, is also therefore accompanied by higher power dissipation, causes display device to produce unnecessary power consumption.
Summary of the invention
The invention provides the driving method of a kind of display device and data drive circuit thereof and display panel, there is the figure place (color depth) of the pixel data of dynamic adjustment/change display device inside, and reach the effect of power saving.
The invention provides a kind of display device, comprise time schedule controller and at least one data drive circuit.Time schedule controller receives input pixel data and also exports the first pixel data according to input pixel data, and wherein the color depth of the first pixel data is not fix and be the first figure place or the second figure place, and the second figure place is less than the first figure place.At least one data drive circuit is coupled to time schedule controller, receive the first pixel data and a notification signal, and according to notification signal in the time that the color depth of the first pixel data is the second figure place, the first pixel data is carried out map operation and produces one second pixel data, and in the time that the color depth of the first pixel data is the first figure place, the first pixel data is not carried out to map operation and directly using the first pixel data as the second pixel data, and also produce at least one driving voltage according to the second pixel data, wherein the color depth of the second pixel data is to be fixed as the first figure place.
The invention provides a kind of data drive circuit, comprise a latch units and a map unit.Latch units is in order to receive and to store one first pixel data from time schedule controller, wherein the color depth of the first pixel data is not fix and be the first figure place or the second figure place, and the second figure place is less than the first figure place.Map unit is coupled to latch units, in order to receive the first stored pixel data of latch units, and according to a notification signal and in the time that the color depth of the first pixel data is the second figure place, the first pixel data is carried out map operation and produces one second pixel data, and in the time that the color depth of the first pixel data is the first figure place, the first pixel data is not carried out map operation and the first pixel data is output as to the second pixel data, wherein the color depth of the second pixel data is to be fixed as the first figure place.
The invention provides a kind of driving method of display panel, comprise that (i) provides one first pixel data to a data drive circuit according to an input pixel data, wherein the color depth of the first pixel data is not fix and be the first figure place or the second figure place, and the second figure place is less than the first figure place; (ii) according to a notification signal and in the time that the first pixel data is the second figure place, the first pixel data is carried out map operation and produces one second pixel data, and in the time that the first pixel data is the first figure place, the first pixel data is not carried out map operation and produces the second pixel data, wherein the color depth of the second pixel data is to be fixed as the first figure place; And (iii) produce at least one driving voltage according to the second pixel data.
The invention provides a kind of display system, comprise an external system and a display device.External system is in order to export an input pixel data.Display device comprises time schedule controller and at least one data drive circuit.Time schedule controller receives also according to input pixel data output one first pixel data, and wherein the color depth of the first pixel data is not fix and be one first figure place or one second figure place, and the second figure place is less than the first figure place.At least one data drive circuit is coupled to time schedule controller, receive the first pixel data and a notification signal, and according to notification signal in the time that the color depth of the first pixel data is the second figure place, the first pixel data is carried out map operation and produces one second pixel data, and in the time that the color depth of the first pixel data is the first figure place, the first pixel data is not carried out to map operation and directly using the first pixel data as the second pixel data, and also produce at least one driving voltage according to the second pixel data, wherein the color depth of the second pixel data is to be fixed as the first figure place.
Display device in one embodiment of this invention, wherein, in map operation, data drive circuit will have 2
nthe first pixel data of rank level, is converted into and has 2
mthe second pixel data of rank level, wherein M is the first figure place, N is the second figure place.
Display device in one embodiment of this invention, wherein time schedule controller is to receive input pixel data by an external system, and time schedule controller also produces notification signal at least one data drive circuit according to input pixel data.
Display device in one embodiment of this invention, wherein time schedule controller is to receive input pixel data by an external system, and at least one data drive circuit is by external system reception notification signal.
Display device in one embodiment of this invention, wherein input pixel data is do not fix and have the first figure place or the second figure place, in the time that input pixel data has the first figure place, time schedule controller output has the first pixel data of the first figure place, and in the time that input pixel data has the second figure place, time schedule controller output has the first pixel data of second number.
Display device in one embodiment of this invention, wherein the color depth of input pixel data is to be fixed as the first figure place.
Display device in one embodiment of this invention, wherein time schedule controller determines according to the content of input pixel data whether not carry out frame per second control and exports the first pixel data that color depth is the first figure place, or carries out frame per second control and export the first pixel data that color depth is the second figure place.
Display device in one embodiment of this invention, wherein time schedule controller comprises a Cyclical Redundancy Check unit, receives and check input pixel data and obtain a check result, then according to check result output notice signal at least one data drive circuit.
Display device in one embodiment of this invention, wherein data drive circuit comprises a latch units, a map unit, a D/A conversion unit and an output buffer cell.Latch units is in order to receive and to store the first pixel data from time schedule controller.Map unit is coupled to latch units, in order to receive the first stored pixel data of latch units, and according to notification signal in the time that the first pixel data is the second figure place, the first pixel data is carried out map operation and produces the second pixel data, and in the time that the first pixel data is the first figure place, the first pixel data is not carried out map operation and the first pixel data is output as to the second pixel data.D/A conversion unit is coupled to map unit, and D/A conversion unit is converted to an analog drive signal according to a set of reference voltages by the second pixel data.Output buffer cell is coupled to D/A conversion unit, in order to receive and the analog drive signal that gains, to export at least one driving voltage.
Data drive circuit in one embodiment of this invention, wherein, in map operation, map unit will have 2
nthe first pixel data of rank level, is converted into and has 2
mthe second pixel data of rank level, wherein M is the first figure place, N is the second figure place.
Data drive circuit in one embodiment of this invention, wherein time schedule controller produces notification signal to map unit.
Data drive circuit in one embodiment of this invention, wherein map unit is by an external system reception notification signal.
Data drive circuit in one embodiment of this invention, wherein the color depth of input pixel data is to be fixed as the first figure place.
Data drive circuit in one embodiment of this invention, also comprises a D/A conversion unit and an output buffer cell.D/A conversion unit is coupled to map unit, and the second pixel data that wherein D/A conversion unit is exported map unit according to a set of reference voltages is converted to an analog drive signal.Output buffer cell is coupled to D/A conversion unit, in order to receive and the analog drive signal that gains, to export at least one driving voltage.
Driving method in one embodiment of this invention, wherein, in map operation, mapping circuit will have 2
nthe first pixel data of rank level, is converted into and has 2
mthe second pixel data of rank level, wherein M is the first figure place, N is the second figure place.
Driving method in one embodiment of this invention, wherein the color depth of input pixel data is not fix and be the first figure place or the second figure place, in the time that the color depth of input pixel data is the first figure place, in step (i), that output color depth is the first pixel data of the first figure place, and in the time that the color depth of input pixel data is the second figure place, in step (i), output color depth is the first pixel data of the second figure place.
Driving method in one embodiment of this invention, wherein the color depth of input pixel data is to be fixed as the first figure place, and in step (i), be to determine according to the content of input pixel data whether not carry out frame per second control and export the first pixel data that color depth is the first figure place, or carry out frame per second control and export the first pixel data that color depth is the second figure place.
Based on above-mentioned, the present invention utilizes map operation to reduce the figure place of the pixel data of display device inside, effectively reduces the data volume of internal transmission to reach effect of power saving.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate appended graphic being described in detail below.
Accompanying drawing explanation
Fig. 1 is according to the block schematic diagram of a kind of display device of the first embodiment of the present invention.
Fig. 2 is the circuit box schematic diagram according to the time schedule controller in embodiment of the present invention key diagram 1.
Fig. 3 is the circuit box schematic diagram according to the data drive circuit in embodiment of the present invention key diagram 1.
Fig. 4 is the block schematic diagram according to one embodiment of the invention explanation frame rate control method.
Fig. 5 is according to the block schematic diagram of a kind of display device of the second embodiment of the present invention.
Fig. 6 is according to the block schematic diagram of a kind of display device of the third embodiment of the present invention.
Fig. 7 is according to the block schematic diagram of a kind of display device of the fourth embodiment of the present invention.
[main element label declaration]
P1: pixel data (6) P2: pixel data (8)
P_in: input pixel data P_in1: input pixel data (8)
P_in2: input pixel data (6) N1: notification signal
D1: latch data S1: drive signal
V1: driving voltage A0, A1: picture data (6)
F1, F2, F3, F4: during picture
F1_1, F1_2, F1_3, F1_4, F2_1, F2_2, F2_3, F2_4, F3_1, F3_2, F3_3, F3_4: sub picture period
100_1,100_2,100_N: data drive circuit
110: time schedule controller 150: display device
160: external system 170: display panel
310: latch units 320: map unit
330: D/A conversion unit 340: output buffer cell
410: Cyclical Redundancy Check unit
Embodiment
" coupling " word using in this case instructions full text (comprising claim) can refer to any direct or indirect connection means.For example, be coupled to the second device if describe first device in literary composition, should be construed as this first device and can be directly connected in this second device, or this first device can be connected to indirectly by other device or certain connection means this second device.
The pixel data figure place of display device internal transmission of the present invention can dynamic change and be not fixed as 6 (bits), 8 or 10.Under hereby describe take 6 or 8 s' pixel data as embodiment, but not as restriction.
Fig. 1 is according to the block schematic diagram of a kind of display device of the first embodiment of the present invention.Please refer to Fig. 1, display device 150 comprise display panel 170, time schedule controller 110 and one or more data drive circuit 100_1,100_2 ..., 100_N.Data drive circuit 100_1～100_N couples time schedule controller 110 jointly, and time schedule controller 110 is connected with an external system 160 of display device 150 outsides, in order to receive input pixel data P_in1.Wherein, above-mentioned external system can be for example the devices such as a host computer system (host system) or system control chip.In the present embodiment, the figure place of input pixel data P_in1 is to be fixed as the first figure place (being for example 8).Time schedule controller 110 is exported the first pixel data P1 to each data drive circuit 100_1～100_N according to input pixel data P_in1, wherein the color depth of the first pixel data P1 is that dynamic change is unfixing, is for example the first figure place or the second figure place that is less than the first figure place.For example, the first figure place is 8 in the present embodiment, and the second figure place is 6.On the other hand, receive after input pixel data P_in1 at time schedule controller 110, time schedule controller 110 can be analyzed input pixel data P_in1, and determines whether dynamically to adjust/change the color depth of the first pixel data P1 according to analysis result.
For example, when time schedule controller 110 receives after input pixel data P_in1, time schedule controller 110 can judge whether this input pixel data P_in1 is dynamic menu data.If this input pixel data P_in1 is tableaux data, due to the amplitude (swing) of pixel data P1 very little (transmission power consumption is very little), can to export color depth be that the pixel data P1 of 8 is to each data drive circuit 100_1～100_N to time schedule controller 110.Therefore, the display panel 170 of display device 150 can show more careful picture color effect.
Otherwise with regard to dynamic menu, because picture is changing always, the difference of 6 color depths and 8 color depths cannot be discovered or can not noted to human eye.Therefore, if this input pixel data P_in1 is dynamic menu data, time schedule controller 110 can utilize frame rate control method (Frame Rate Control, FRC) (after appearance, explain) or the input pixel data P_in1 that other method is 8 by color depth to be converted to color depth be the pixel data P1 of 6, and difference output pixel data P1 and extremely each data drive circuit 100_1～100_N of notification signal N1, so that each data drive circuit 100_1～100_N drives display panel 170 according to pixel data P1 and notification signal N1.
That is to say, according to the content of input pixel data P_in1, time schedule controller 110 can determine not carry out frame per second control and export the first pixel data P1 that color depth is the first figure place (for example 8), or determines carry out frame per second control and export the first pixel data P1 that color depth is the second figure place (for example 6).In the time that input pixel data P_in1 is dynamic menu data, time schedule controller 110 has dynamically reduced the figure place (color depth) of the pixel data P1 that sends data drive circuit 100_1～100_N to, and then reduces through-put power consumption.
Fig. 2 is the circuit box schematic diagram according to embodiment of the present invention time schedule controller 110, and it can be applicable to the display device in Fig. 1 embodiment but is not limited to this.Please refer to Fig. 2, time schedule controller 100 comprises a Cyclical Redundancy Check unit 410 and an image processor (Image processor) 420.Cyclical Redundancy Check unit 410 receives and checks input pixel data P_in (example is input pixel data P_in2 shown in input pixel data P_in1 or Fig. 5 as shown in Figure 1) and obtain check result, then according to this check result output notice signal N1 to data drive circuit 100_1～100_N.For example, Cyclical Redundancy Check unit 410 receives input pixel data P_in, and compare/checks a crc value of different pictures (frame) in this input pixel data P_in.If the crc value of each picture has obvious variation, Cyclical Redundancy Check unit 410 can judge that this input pixel data P_in is dynamic image, and Cyclical Redundancy Check unit 410 can output notice signal N1.
In addition, be applied in the situation that embodiment illustrated in fig. 1, if it is dynamic image that Cyclical Redundancy Check unit 410 judges input pixel data P_in, for example can to utilize pixel data P_in (being the P_in1 of input pixel data shown in Fig. 1) that frame rate control method (explaining after appearance) is 8 by color depth to be converted to color depth be the pixel data P1 of 6 to the image processor 420 of time schedule controller 110.But, it should be noted that, in other embodiments, for example (being detailed later) embodiment illustrated in fig. 5, no matter this input pixel data P_in is dynamic image or still image, image processor 420, in the time input pixel data P_in being carried out to image processing, can not be changed the color depth of input pixel data P_in, and the pixel data P1 of output figure place identical with input pixel data P_in (color depth).
Fig. 3 is the circuit box schematic diagram according to the data drive circuit 100_1 of the embodiment of the present invention, and it can be applicable to the display device in Fig. 1 embodiment but is not limited to this.Fig. 3 only illustrates the implementation detail of a data drive circuit 100_1 wherein, the related description that the embodiment of other data drive circuit 100_2～100_N can comparable data driving circuit 100_1 and analogize it.
Please refer to Fig. 3, data drive circuit 100_1 comprises a latch units 310, a map unit 320, a D/A conversion unit 330 and an output buffer cell 340.First, latch units 310 is from the pixel data P1 that time schedule controller 110 receives and latch inputs to data drive circuit 100_1 as a latch data D1, and output latch data D1 is to map unit 320.The map unit 320 that is coupled to latch units 310 receives latch data D1, and determines whether latch data D1 (being the first stored pixel data P1 of latch units 310) is done to map operation (explaining after appearance) according to notification signal N1.For example, in described map operation, data drive circuit 100_1 will have 2
nthe first pixel data P1 of rank level is converted into has 2
mthe second pixel data P2 of rank level, wherein M is this first figure place (being for example 8), N is this second figure place (being for example 6).Wherein, notification signal N1 provides from the time schedule controller 110 shown in Fig. 1 or Fig. 5.In other embodiments, for example Fig. 6 or (being detailed later) embodiment illustrated in fig. 7, notification signal N1 provides from external system 160.
Continue with reference to figure 3, according to notification signal N1, for example, if the color depth of pixel data P1 is the second figure place (being 6), map unit 320 latch data D1 (being the first stored pixel data P1 of latch units 310) is carried out to map operation (explaining after appearance) and produce color depth be the second pixel data P2 of the first figure place (being for example 8); For example, if the color depth of pixel data P1 is the first figure place (being 8), map unit 320 is not carried out map operation (explaining after appearance) to latch data D1 (being the first stored pixel data P1 of latch units 310), and directly using latch data D1 output as figure place is the pixel data P2 of 8.Next the D/A conversion unit 330 that, is coupled to map unit 320 for example, is converted to analog drive signal S1 according to set of reference voltages (GAMMA voltage group) by the second pixel data P2 of numeral.The output buffer cell 340 that is coupled to D/A conversion unit 330 receives and the analog drive signal S1 that gains, to export at least one driving voltage V1 to display panel 170.
Fig. 4 is the schematic diagram according to one embodiment of the invention explanation frame rate control method.Fig. 1, Fig. 5, Fig. 6 and embodiment illustrated in fig. 7 in frame per second control can analogize it with reference to the explanation of Fig. 4.In certain embodiments, for example (being detailed later) embodiment illustrated in fig. 1 or embodiment illustrated in fig. 6, carrying out frame per second control shown in Fig. 4 left part by time schedule controller 110, for example, is the second figure place (for example 6 s') pixel data so that the pixel data corresponding conversion that is the first figure place (8) by color depth is color depth.The frame per second control of rest of pixels data can be analogized according to the explanation of Fig. 4.In further embodiments, for example Fig. 5 or (being detailed later) embodiment illustrated in fig. 7, frame per second control shown in Fig. 4 left part is undertaken by external system 160.
Please refer to Fig. 1, Fig. 3 and Fig. 4, take F1 during picture as example, if the input pixel data P_in1 of 8 is " 00000000 ", time schedule controller 110 can be got the end two " 00 " of " 00000000 " as frame per second control parameter, and by two positions of " 00000000 " displacement to the right as the first frame per second control data.Pixel data than the large GTG of the first frame per second control data is chosen as the second frame per second control data.For example, if the first frame per second control data are " 000000 ", the second frame per second control data are " 000001 ".According to frame per second control parameter, time schedule controller 110 selects transmission the first frame per second control data or the second frame per second control data as the first pixel data P1 at sub picture period F1_1, F1_2, F1_3 and F1_4 respectively.For example, as shown in Figure 2, according to frame per second control parameter " 00 ", time schedule controller 110 respectively sub picture period F1_1, F1_2, F1_3 and F1_4 sequentially select to transmit " 000000 ", " 000000 ", " 000000 " and " 000000 " as the first pixel data P1 to data drive circuit 100_1～100_N.
Fig. 4 right part explanation data drive circuit (for example 100_1) carries out the example of map operation.In the time that notification signal N1 represents that frame per second control has been carried out, the map unit 320 of data drive circuit 100_1 can be carried out map operation, so that the first pixel data P1 receiving (color depth is as 6) is converted to the second pixel data P2 (color depth is as 8).For example, the map unit 320 of data drive circuit 100_1 can move to left two at sub picture period F1_1, F1_2, F1_3 and F1_4 by pixel data " 000000 " respectively, to obtain pixel data " 00000000 ".
Take F2 during picture as example, if the input pixel data P_in1 of 8 is " 00000001 ", time schedule controller 110 can be got the end two " 01 " of " 00000000 " as frame per second control parameter, and by two positions of " 00000000 " displacement to the right as the first frame per second control data.Therefore, the second frame per second control data are " 000001 ".As shown in Figure 2, according to frame per second control parameter " 01 ", time schedule controller 110 respectively sub picture period F2_1, F2_2, F2_3 and F2_4 sequentially select to transmit " 000000 ", " 000000 ", " 000000 " and " 000001 " as the first pixel data P1 to data drive circuit 100_1～100_N.The map unit 320 of data drive circuit 100_1 can be carried out map operation according to notification signal N1, so that the pixel data receiving at sub picture period F2_1, F2_2, F2_3 and F2_4 " 000000 ", " 000000 ", " 000000 " and " 000001 " are moved to left respectively to two, to obtain respectively color depth as pixel data " 00000000 ", " 00000000 ", " 00000000 " and " 00000100 " of 8.Therefore, utilize colour mixture in time, the display panel 170 of display device 150 can show the color/GTG between " 00000000 " and " 00000100 ", is namely equivalent to the color/GTG of " 00000001 ".
By that analogy, if in F3, the input pixel data P_in1 of 8 is " 00000010 " during picture, time schedule controller 110 respectively sub picture period F3_1, F3_2, F3_3 and F3_4 select to transmit " 000000 ", " 000000 ", " 000001 " and " 000001 " as the first pixel data P1 to data drive circuit 100_1～100_N.Map unit 320 can be carried out map operation according to notification signal N1, so that the pixel data receiving at sub picture period F3_1, F3_2, F3_3 and F3_4 " 000000 ", " 000000 ", " 000001 " and " 000001 " are moved to left respectively to two, to obtain respectively color depth as pixel data " 00000000 ", " 00000000 ", " 00000100 " and " 00000100 " of 8.Therefore, the display panel 170 of display device 150 can show the color/GTG between " 00000000 " and " 00000100 ", is namely equivalent to the color/GTG of " 00000010 ".
In other embodiments, the first frame per second control data and the second frame per second control data are not limited to the order shown in Fig. 4 putting in order of four sub picture period.For example, in another embodiment, if in F3, the input pixel data P_in1 of 8 is " 00000010 " during picture, time schedule controller 110 can be respectively sub picture period F3_1, F3_2, F3_3 and F3_4 sequentially select to transmit " 000000 ", " 000001 ", " 000000 " and " 000001 " as the first pixel data P1 to data drive circuit 100_1～100_N.
Fig. 5 illustrates a kind of circuit box schematic diagram of display device according to the second embodiment of the present invention.The embodiment of the display device 150 that Fig. 5 illustrates all can be analogized it with reference to the related description of Fig. 1.With described in Fig. 1, first implement not existing together of profit, be that the color depth of input pixel data P_in2 in embodiment that Fig. 5 illustrates is the first figure place (for example 8) or the second figure place (for example 6).Meaning, external system 160 judges whether its handled pixel data (for generation of input pixel data P_in2) is dynamic menu data in advance, and utilizes the pixel data that frame rate control method (example as shown in Figure 4) is the first figure place (for example 8) by color depth to be converted to the input pixel data P_in2 that color depth is the second figure place.When time schedule controller 110 receives after input pixel data P_in2, time schedule controller 110 can check input pixel data P_in2 and obtain check result, then according to this check result output notice signal N1 to data drive circuit 100_1～100_N.In the embodiment shown in fig. 5, no matter this input pixel data P_in2 is dynamic image or still image, time schedule controller 110 can not carry out frame per second control, and exports the pixel data P1 of figure place identical with input pixel data P_in2 (color depth) to data drive circuit 100_1～100_N.Each data drive circuit 100_1～100_N drives display panel 170 according to pixel data P1 and notification signal N1.
Fig. 6 illustrates a kind of circuit box schematic diagram of display device according to the third embodiment of the present invention.The embodiment of the display device 150 that Fig. 6 illustrates all can be analogized it with reference to the related description of Fig. 1.With not existing together of the first embodiment described in Fig. 1, be that Fig. 6 illustrates each data drive circuit 100_1～100_N in embodiment respectively from external system 160 reception notification signal N1, rather than from time schedule controller 110.Please refer to Fig. 6, external system 160 judges whether its handled pixel data (for generation of input pixel data P_in1) is dynamic menu data in advance, and gives notice signal N1 to each data drive circuit 100_1～100_N according to judged result.In the embodiment shown in fig. 6, no matter this input pixel data P_in1 is dynamic image or still image, external system 160 can not carried out frame per second control, and the input pixel data P_in1 that is the first figure place by color depth exports time schedule controller 110 to.When time schedule controller 110 receives after input pixel data P_in1, time schedule controller 110 can check input pixel data P_in1 and obtain check result, judge whether to carry out frame rate control method (example as shown in Figure 4) according to this check result again, for example, for example, so that the input pixel data P_in1 that is the first figure place (8) by color depth is converted to the first pixel data P1 that color depth is the second figure place (6).Each data drive circuit 100_1～100_N drives display panel 170 according to pixel data P1 and notification signal N1.
Fig. 7 illustrates a kind of circuit box schematic diagram of display device according to the fourth embodiment of the present invention.The embodiment of the display device 150 that Fig. 7 illustrates all can be analogized it with reference to the related description of Fig. 5.The second embodiment described in the present embodiment and Fig. 5 does not exist together, and is that each data drive circuit 100_1～100_N in the embodiment described in Fig. 7 is respectively from external system 160 reception notification signal N1, rather than from time schedule controller 110.Please refer to Fig. 7, in the present embodiment, time schedule controller 110 can not carry out frame per second control.External system 160 judges whether its handled pixel data (for generation of input pixel data P_in2) is dynamic menu data in advance, and is given to each data drive circuit 100_1～100_N according to judged result generation notification signal N1.External system 160 also determines whether carry out frame per second control (example as shown in Figure 4) and the pixel data that is the first figure place (for example 8) by color depth is converted to the input pixel data P_in2 that color depth is the second figure place (for example 6) according to judged result.Therefore the color depth of input pixel data P_in2 can be the first figure place (for example 8) or the second figure place (for example 6).Each data drive circuit 100_1～100_N drives display panel 170 according to pixel data P1 and notification signal N1.
Conclude the various embodiments described above, notification signal can be produced by external system, or is produced by time schedule controller.In addition, other adjustment mode of frame per second control or color depth can be undertaken by external system, or is undertaken by time schedule controller.Therefore, can there is the embodiment of multiple various combination.
Although it should be noted that in above-described embodiment, the color depth of the first pixel data P1 is all dynamically changed into the first figure place or the second figure place, and so, in other embodiment, the first pixel data P1 can dynamically change into how different figure places.Corresponding to the first pixel data P1 of different bits number, external system or time schedule controller can be controlled according to mode similarly, make data drive circuit can in time carry out not the map operation between isotopic number or not carry out map operation, and then reach the effect that reduces power consumption in display device.
In sum, whether the display device of above-described embodiment is dynamic menu by the picture that judges current demonstration, and can frame per second control or other method reduce the pixel data amount of display device internal transmission, again by the map operation method in data drive circuit, play dynamic menu with low level pixel data, and then reach the effect that reduces power consumption in display device.
Although the present invention discloses as above with embodiment; so it is not in order to limit the present invention; under any, in technical field, have and conventionally know the knowledgeable; without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore protection scope of the present invention is when being as the criterion depending on the appended claim scope person of defining.
Claims (26)
1. a display device, comprising:
Time schedule controller, receives an input pixel data also according to this input pixel data output one first pixel data, and wherein the color depth of this first pixel data is not fix and be one first figure place or one second figure place, and this second figure place is less than this first figure place; And
At least one data drive circuit, be coupled to this time schedule controller, receive this first pixel data and a notification signal, and according to this notification signal in the time that the color depth of this first pixel data is this second figure place, this first pixel data is carried out map operation and produces one second pixel data, and in the time that the color depth of this first pixel data is this first figure place, this first pixel data is not carried out to this map operation and directly using this first pixel data as this second pixel data, and also produce at least one driving voltage according to this second pixel data, wherein the color depth of this second pixel data is to be fixed as this first figure place.
2. display device according to claim 1, wherein, in this map operation, this data drive circuit will have 2
nthis first pixel data of rank level, is converted into and has 2
mthis second pixel data of rank level, wherein M is this first figure place, N is this second figure place.
3. display device according to claim 1, wherein this time schedule controller is to receive this input pixel data by an external system, and this time schedule controller also produces this notification signal to this at least one data drive circuit according to this input pixel data.
4. display device according to claim 1, wherein this time schedule controller is to receive this input pixel data by an external system, and this at least one data drive circuit is to receive this notification signal by this external system.
5. display device according to claim 1, wherein this input pixel data is do not fix and have this first figure place or this second figure place, in the time that this input pixel data has this first figure place, this time schedule controller output has this first pixel data of this first figure place, and in the time that this input pixel data has this second figure place, this time schedule controller output has this first pixel data of this second figure place.
6. display device according to claim 1, wherein the color depth of this input pixel data is to be fixed as this first figure place.
7. display device according to claim 6, wherein this time schedule controller determines according to the content of this input pixel data whether not carry out frame per second control and exports this first pixel data that color depth is this first figure place, or carries out frame per second control and export this first pixel data that color depth is this second figure place.
8. display device according to claim 1, wherein this time schedule controller comprises a Cyclical Redundancy Check unit, receive and check this input pixel data and obtain a check result, then exporting this notification signal to this at least one data drive circuit according to this check result.
9. display device according to claim 1, wherein this data drive circuit comprises:
One latch units, in order to receive and to store this first pixel data from this time schedule controller;
One map unit, be coupled to this latch units, in order to receive this stored first pixel data of this latch units, and according to this notification signal in the time that the color depth of this first pixel data is this second figure place, this first pixel data is carried out this map operation and produces this second pixel data, and in the time that the color depth of this first pixel data is this first figure place, this first pixel data is not carried out this map operation and this first pixel data is output as to this second pixel data;
One D/A conversion unit, is coupled to this map unit, and this D/A conversion unit is converted to an analog drive signal according to a set of reference voltages by this second pixel data; And
One output buffer cell, is coupled to this D/A conversion unit, in order to receive and this analog drive signal that gains, to export this at least one driving voltage.
10. a data drive circuit, comprising:
One latch units, in order to receive and to store one first pixel data from time schedule controller, wherein the color depth of this first pixel data is not fix and be the first figure place or the second figure place, this second figure place is less than this first figure place; And
One map unit, be coupled to this latch units, in order to receive this stored first pixel data of this latch units, and according to a notification signal and in the time that the color depth of this first pixel data is this second figure place, this first pixel data is carried out map operation and produces one second pixel data, and in the time that the color depth of this first pixel data is this first figure place, this first pixel data is not carried out this map operation and this first pixel data is output as to this second pixel data, wherein the color depth of this second pixel data is to be fixed as this first figure place.
11. data drive circuits according to claim 10, wherein, in this map operation, this map unit will have 2
nthis first pixel data of rank level, is converted into and has 2
mthis second pixel data of rank level, wherein M is this first figure place, N is this second figure place.
12. data drive circuits according to claim 10, wherein this time schedule controller produces this notification signal to this map unit.
13. data drive circuits according to claim 10, wherein this map unit is to receive this notification signal by an external system.
14. data drive circuits according to claim 10, also comprise:
One D/A conversion unit, is coupled to this map unit, and this second pixel data that wherein this D/A conversion unit is exported this map unit according to a set of reference voltages is converted to an analog drive signal; And
One output buffer cell, is coupled to this D/A conversion unit, in order to receive and this analog drive signal that gains, to export at least one driving voltage.
The driving method of 15. 1 kinds of display panels, comprising:
I. provide one first pixel data to a data drive circuit according to an input pixel data, wherein the color depth of this first pixel data is not fix and be the first figure place or the second figure place, and this second figure place is less than this first figure place;
Ii. according to a notification signal and in the time that this first pixel data is this second figure place, this first pixel data is carried out map operation and produces one second pixel data, and in the time that this first pixel data is this first figure place, this first pixel data is not carried out this map operation and produces this second pixel data, wherein the color depth of this second pixel data is to be fixed as this first figure place; And
Ii i. produces at least one driving voltage according to this second pixel data.
16. driving methods according to claim 15, wherein, in this map operation, this mapping circuit will have 2
nthis first pixel data of rank level, is converted into and has 2
mthis second pixel data of rank level, wherein M is this first figure place, N is this second figure place.
17. driving methods according to claim 15, wherein the color depth of this input pixel data is not fix and be this first figure place or this second figure place, in the time that the color depth of this input pixel data is this first figure place, in step I, that output color depth is this first pixel data of this first figure place, and in the time that the color depth of this input pixel data is this second figure place, in step I, exporting color depth is this first pixel data of this second figure place.
18. driving methods according to claim 15, wherein the color depth of this input pixel data is to be fixed as this first figure place, and in step I, be to determine according to the content of this input pixel data whether not carry out frame per second control and export this first pixel data that color depth is this first figure place, or carry out frame per second control and export this first pixel data that color depth is this second figure place.
19. 1 kinds of display systems, comprising:
One external system, in order to export an input pixel data; And
One display device, this display device comprises:
Time schedule controller, receives also according to this input pixel data output one first pixel data, and wherein the color depth of this first pixel data is not fix and be one first figure place or one second figure place, and this second figure place is less than this first figure place; And
At least one data drive circuit, be coupled to this time schedule controller, receive this first pixel data and a notification signal, and according to this notification signal in the time that the color depth of this first pixel data is this second figure place, this first pixel data is carried out map operation and produces one second pixel data, and in the time that the color depth of this first pixel data is this first figure place, this first pixel data is not carried out to this map operation and directly using this first pixel data as this second pixel data, and also produce at least one driving voltage according to this second pixel data, wherein the color depth of this second pixel data is to be fixed as this first figure place.
20. display systems according to claim 19, wherein, in this map operation, this data drive circuit will have 2
nthis first pixel data of rank level, is converted into and has 2
mthis second pixel data of rank level, wherein M is this first figure place, N is this second figure place.
21. display systems according to claim 19, wherein this time schedule controller produces this notification signal to this at least one data drive circuit according to this input pixel data.
22. display systems according to claim 19, wherein this external system produces this notification signal to this at least one data drive circuit according to its handled pixel data.
23. display systems according to claim 19, wherein this external system determines according to the content of its handled pixel data whether not carry out frame per second control and exports this input pixel data that color depth is this first figure place, or carries out frame per second control and export this input pixel data that color depth is this second figure place.
24. display systems according to claim 23, wherein in the time that this input pixel data has this first figure place, this time schedule controller output has this first pixel data of this first figure place, and in the time that this input pixel data has this second figure place, this time schedule controller output has this first pixel data of this second figure place.
25. display systems according to claim 19, wherein this external system output color depth is this input pixel data that is fixed as this first figure place.
26. display systems according to claim 25, wherein this time schedule controller determines according to the content of this input pixel data whether not carry out frame per second control and exports this first pixel data that color depth is this first figure place, or carries out frame per second control and export this first pixel data that color depth is this second figure place.
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