Background technique
Currently, with OLED(Organic Light-Emitting Diode, Organic Light Emitting Diode) technology it is quickDevelopment, Flexible Displays mould group have come in face of the majority of consumers.Especially in mobile phone terminal, 2.5D screen, 3D screen are graduallyInstead of original glass rigidity screen, become more and more smart phone products be keen to using display screen.
Screen is most important device in display equipment, and the form of screen finally determines mobile phone and other display equipmentForm.For current smart phone product, the function of realizing on mobile phone is more and more, and consumer not only needsIt made a phone call, sent short messages by mobile phone, also got used to using surfing Internet with cell phone, read a book, watch movie.When user beats electricity using mobile phoneWhen talking about, sending short messages, do not need very big screen, and screen it is big carry it is also inconvenient.But when user needs using mobile phoneIt reads a book, watch movie or when Video chat, then can wish that screen is the bigger the better.
In order to meet consumer under different service conditions to the different demands of screen size, certain mobile phones are rolled over using double screenFolded design.That is, two pieces of screens are arranged on mobile phone, one can be laid in the front of mobile phone, another can be laid in mobile phoneThe back side, the body of mobile phone is designed to accordion structure.When using mobile phone communication, by phone folded, merely with positive oneBlock screen display operation interface, can meet the use demand of user.And when needing to read a book, watch movie using mobile phone, it can be withThe body of mobile phone is unfolded, so that two pieces of screens is docking together, forms one piece of large screen, to meet the ornamental need of consumer's large-size screen monitorsIt asks.
The mobile phone designed using the above structure, when folding, handset size is small, is convenient for carrying, and small-size screen is able to satisfyThe daily demand of consumer；After expansion, large scale screen can satisfy the specific use demand of consumer again.But it is this doubleScreen design is due to using two pieces of independent display screens, it is therefore desirable to configure two driving chips, in mobile phone with right respectivelyTwo pieces of screens carry out display drive control, to cause the apparent increase of hardware cost.Also, one is being shown using two pieces of screensWhen secondary picture, application program needs the video data to each frame picture to pre-process, by video corresponding to a frame pictureData are divided into two parts, corresponding to be transmitted to two driving chips, and then two pieces of screens is driven respectively to show a part, two screen splitsForm a secondary complete picture.Due to needing to pre-process to video data, obviously increasing for software cost will cause,Data calculation amount increases, and has higher requirement to the processing speed of processor.
Summary of the invention
The purpose of this utility model is to provide a kind of shuangping san driving circuit based on flexible screen, using soft to one pieceProperty the mode that is folded of screen, form two pieces of various sizes of viewing areas, pass through and the data line of two viewing areas of connection is carried outA gating is selected, the multi-section display of picture is realized.
In order to solve the above technical problems, the utility model is achieved using following technical scheme:
In one aspect, the utility model proposes a kind of shuangping san driving circuit based on flexible screen, wherein describedFlexible screen folds to form size not two equal viewing areas, and the size of big viewing area is N times of the size of small viewing area, and N isInteger；The small viewing area includes m data input terminal, is drawn by the m data output that m data line connects driving chipFoot, and it is connected separately in the m data line the first controllable switch for controlling the m data line on-off；InstituteStating big viewing area includes m × N number of data input pin, and adjacent N number of data input pin forms one group of connection same data line, m groupData input pin connects the m data output pin of the driving chip by other m data line, and described anotherThe second controllable switch for controlling the other m data line on-off is connected separately in outer m data line；The driving corePiece connects processor, receives the video data and control signal of processor output, video data is exported by the m dataPin output, and a conducting is selected using control signal control first controllable switch and the second controllable switch.
Preferably, first controllable switch and the second controllable switch can be metal-oxide-semiconductor；Driving chip is drawn in order to reduceThe occupancy quantity of foot, is preferably configured to NMOS tube for one of controllable switch, another controllable switch is configured to PMOSPipe.Such as:
When first controllable switch selects NMOS tube, and second controllable switch selects PMOS tube, the driving corePiece can export control signal all the way and be transmitted separately to the grid of the NMOS tube and the grid of PMOS tube；When the control signalWhen for high level, the NMOS transistor conduction can control, to show picture by the small viewing area；When the control signalWhen for low level, the PMOS tube conducting can control, to show picture by the big viewing area；
When first controllable switch selects PMOS tube, and second controllable switch selects NMOS tube, the driving corePiece can export control signal all the way and be transmitted separately to the grid of the PMOS tube and the grid of NMOS tube；When the control signalWhen for low level, the PMOS tube conducting can control, to show picture by the small viewing area；When the control signalWhen for high level, the NMOS transistor conduction can control, to show picture by the big viewing area.
In order to when showing picture using big viewing area, reach further energy-efficient purpose, the utility model is preferably usedTimesharing driving method, that is, in the m group data input pin of the big viewing area, by N number of data in each group of data input pinInput terminal passes through a branch data line respectively and connects the data line connecting with this group of data input pin, and in each branchThe Time-sharing control switch for controlling the branch data line on-off is separately connected in data line；The driving chip is big in controlWhen viewing area shows picture, generates N number of Time-sharing control switch that driving signal control is connected in each group of branches data line and existTimesharing is connected in the display cycle of one frame picture.
Preferably, twice that big viewing area is small viewing area, i.e. N=2 are preferably provided with；At this point, the m in the big viewing areaIt include two data input pins in each group of data input pin, and defeated connecting described two data in group data input pinEnter to respectively correspond the first Time-sharing control of setting in two branch data lines at end to switch and the second Time-sharing control switch, the drivingChip can control half period before m the first Time-sharing control switch conductions within the display cycle of a frame picture, control m theTwo Time-sharing control switch conduction second half of the cycle.
Preferably, the first Time-sharing control switch and the second Time-sharing control switch can select metal-oxide-semiconductor；In order to reduce pairThe occupancy quantity of driving chip pin, preferably by one of Time-sharing control switchgear distribution at NMOS tube, by another timesharingControl switch is configured to PMOS tube.Such as:
When first Time-sharing control switch is NMOS tube, and the second Time-sharing control switch is PMOS tube, the driveDynamic chip can export driving signal all the way and be transmitted separately to the grid of the NMOS tube and the grid of PMOS tube；The driving letterIt in half of display cycle is high level number before a frame picture, for controlling the NMOS transistor conduction, after a frame pictureIt is low level in half of display cycle, for controlling the PMOS tube conducting；
When first Time-sharing control switch is PMOS tube, and the second Time-sharing control switch is NMOS tube, the driveDynamic chip can export driving signal all the way and be transmitted separately to the grid of the PMOS tube and the grid of NMOS tube；The driving letterIt is low level in half of display cycle number before a frame picture, can control the PMOS tube conducting, after a frame pictureIt is high level in half of display cycle, can control the NMOS transistor conduction.
In order to realize picture in the automatic switchover of two viewing areas, big viewing area can be folded toward described in preferred design, instituteProcessor is stated when the big viewing area is in folded state, output can control the control signal of the first controllable switch conducting,Picture is shown by small viewing area；For the processor when the big viewing area is in unfolded state, output can control described secondThe control signal of controllable switch conducting shows picture by big viewing area.
In order to realize processor to the automatic identification of big viewing area folded state, the utility model drives in the shuangping sanLight sensitive component is additionally provided in dynamic circuit, the light sensitive component is blocked when the big viewing area is in folded state, describedBig viewing area is exposed when being in unfolded state, and the light sensitive component is blocked according to it or exposed state generates detection signal and is sent to instituteProcessor is stated, the processor determines the folding or unfolded state of the big viewing area according to the detection signal received,To complete display picture in the automatic on-demand switching of two viewing areas of flexible screen.
On the other hand, the utility model also proposed a kind of electronic product, including body, flexible screen, driving chipAnd processor；The flexible screen folds to form size not two equal viewing areas, and the size of big viewing area is small viewing areaN times of size, N are integer；The small viewing area includes m data input terminal, and the m of driving chip is connected by m data lineA data output pins, and be connected separately in the m data line for controlling the m data line on-off firstControllable switch；The big viewing area includes m × N number of data input pin, and adjacent N number of data input pin forms one group of connection sameData line, m group data input pin connect the m data output pin of the driving chip by other m data line, andAnd the second controllable switch for controlling the other m data line on-off is connected separately in the other m data line；The driving chip connects processor, receives the video data and control signal of processor output, video data is passed through the mA data output pins output, and select one using control signal control first controllable switch and the second controllable switch and leadIt is logical.
Preferably, the body is folding body, including upper machine body and lower body, the upper machine body and lower bodySide is hinged, and the big viewing area is located at the upper machine body and lower body after body folding in opposite positional relationshipOn side, the small viewing area is located on the lateral surface of upper machine body.
Preferably, the electronic product can be clamshell phone, be also possible to foldable reading equipment, also or foldFormula viewing equipment.
Compared with prior art, the advantages and positive effects of the utility model are as follows: the utility model is used to one piece of flexibilityScreen fold the mode for forming the different viewing area of two block sizes, and two pieces of viewing areas being carried out with the driving of timesharing subregion, sameThe display that Resolutions are realized in one display module, meet consumer under different service conditions to screen size notSame demand.Also, according to the state of display module, when picture switches between two viewing areas, display picture may be implementedSeamless connection, and can guarantee the quality of display picture.The effect that the prior art is needed two pieces of display modules to complete by the utility modelFruit realizes in same display module, and the usage quantity of the components such as driving chip has not only been saved on hardware, reducesHardware cost；Moreover, the pretreatment such as being split without the video data to each frame picture on software, save softPart cost reduces the requirement to the processing speed of processor.
After the detailed description of the utility model embodiment is read in conjunction with the figure, other features and advantages of the utility modelIt will become clearer.
Specific embodiment
Specific embodiment of the present utility model is described in more detail with reference to the accompanying drawing.
The present embodiment illustrates the specific implementation of dual display function by taking mobile phone products as an example.
In order to meet consumer under different service conditions to the different demands of screen size, need to realize on mobile phoneThe display of Resolutions, that is, small one and large one two viewing areas.In call, small viewing area can be used；And in reading, sightWhen shadow, big viewing area can be used.Also, in order to keep mobile phone easy to carry, the size of mobile phone be should not be too large.For this purpose, this implementationThe body of mobile phone is designed to folding structure by example, as Figure 1-Figure 4, including upper machine body 10 and lower body 20, and upper machineThe side of body 10 and lower body 20 is hinged, such as is rotatably connected by shaft 40, can both fold in small size state,As shown in Figure 1, can also be fully deployed in large scale state, as shown in Figure 3.One piece of flexible screen is installed on the body of mobile phone30, and the flexible screen 30 is folded, form size not two equal viewing areas, that is, one small viewing area 31 and one big aobviousShow area 32.Small viewing area 31 is laid in the outside of upper machine body 10, as Figure 1 and Figure 4；Big viewing area 32 is laid in mobile phoneBody fold after, upper machine body 10 and lower body 20 are on the medial surface of opposite positional relationship, as shown in Figure 2 and Figure 3.It is described smallThe size of viewing area 31 can determine that the size of the big viewing area 32 can basis according to the size of the lateral surface of upper machine body 10The sum of size of medial surface of upper machine body 10 and lower body 20 determines, it is possible thereby to which the size of big viewing area 32 is made to be small displayTwice of the size in area 31.For the electronic product using other folded forms, the size of big viewing area can be made to beN times (N is integer) of the size of small viewing area, such as three times, four times etc., the present embodiment is to this without concrete restriction.
The present embodiment is only illustrated so that the size of big viewing area 32 is twice of the size of small viewing area 31 as an example, is such as schemedShown in 2, when upper machine body 10 and lower body 20 are in folded state, the big viewing area 32 of flexible screen 30 is also in doubled state.In order toThe body for enabling cell phone system to automatically identify mobile phone is presently at rugosity body or unfolded state, and then makes mobile phone systemSystem the change of body folded state can be automatically performed according to user display picture two viewing areas 31,32 switching,The present embodiment installs light sensitive component 50 preferably on the medial surface of the medial surface of upper machine body 10 or lower body 20, as shown in Figure 3.The light sensitive component 50 is blocked when big viewing area 32 is in folded state, exports the detection signal of low level (or high level)；And it is exposed when big viewing area 32 is in unfolded state, export the detection signal of high level (or low level).Utilize cell phone system electricityProcessor in road receives the detection signal that light sensitive component 50 exports, and can be known according to the low and high level state of the detection signalNot Chu big viewing area 32 folding or unfolded state.When big viewing area 32 is in folded state, that is, the upper machine body 10 of mobile phone is underBody 20 is stacked, and shows as shown in Figure 1, can control small viewing area 31 at this time and carry out picture.And in big viewing area 32When in unfolded state, that is, the upper machine body 10 and lower body 20 of mobile phone are fully deployed, as shown in figure 3, at this point it is possible to switching to bigViewing area 32 carries out picture and shows.
In order to realize display picture in the automatic switching on demand in two viewing areas 31,32 of flexible screen 30, the present embodiment designShuangping san driving circuit as shown in Figure 5.Still it is with twice of size that the size of big viewing area 32 is small viewing area 31Example is illustrated.
Assuming that small viewing area 31 include m data input terminal S1 ..., Sx ..., Sm, due to the ruler of big viewing area 32Very little is twice of the size of small viewing area 31, therefore, big viewing area 32 just include 2m data input pin S1 ', S1 ' ' ...,Sx ', Sx ' ' ..., Sm ', Sm ' '.By the m data input terminal S1 of small viewing area 31 ..., Sx ..., Sm pass through m item numberAccording to line respectively with the m data output pin D1 of the driving chip in cell phone system circuit ..., Dx ..., Dm correspondConnection, and be respectively set in the m data line the first controllable switch K1 ..., Kx ..., Km, for describedM data line carries out on-off control.For 2m data input pin S1 ' of big viewing area 32, S1 ' ' ..., Sx ',For Sx ' ' ..., Sm ', Sm ' ', adjacent two data input terminal can be formed into one group of connection same data line, for example,S1 ', S1 ' ' form one group of connection the first data line；Sx ', Sx ' ' form one group of connection xth data line；Sm ', Sm ' ' are formedOne group of connection m data line.2m data input pin of big viewing area 32 is just divided into m group as a result, passes through other m item numberAccording to line be respectively connected to the driving chip the m data output pin D1 ..., Dx ..., Dm.Also, describedIn addition be respectively set in m data line the second controllable switch KK1 ..., KKx ..., KKm, for the other mData line carries out on-off control.
In the present embodiment, the driving chip can be connected to processor, video data DATA is generated by processorWith control signal CTRL, it is transmitted to driving chip.Wherein, the detection signal that control signal CTRL is exported according to light sensitive component 50 is rawAt when light sensitive component 50 detects big viewing area 32 in folded state, processor output is for controlling the first controllable switchK1 ..., Kx ..., Km conducting control signal；When light sensitive component 50 detects big viewing area 32 in unfolded state, placeReason device output for control the second controllable switch KK1 ..., KKx ..., KKm be connected control signal.Video data DATAThen via the m data output pin D1 of driving chip ..., Dx ..., Dm export, transmitted by the controllable switch of conductingTo small viewing area 31 or big viewing area 32, to realize the multi-section display of picture.
In order to save the pin resource of processor and driving chip, the MOS that the present embodiment preferably uses on-off characteristic oppositePipe is as first controllable switch and the second controllable switch.That is, one of controllable switch selects NMOS tube, anotherControllable switch selects PMOS tube, and such processor need to only export control signal CTRL all the way, by changing the control signalThe low and high level state of CTRL, the first controllable switch and the second controllable switch can be realized selects a conducting.
Specifically, when the first controllable switch K1 ..., Kx ..., Km select NMOS tube, and the second controllable switchKK1 ..., KKx ..., KKm is when selecting PMOS tube, processor output controls signal CTRL all the way, passes through driving chipIt is transmitted separately to the grid of NMOS tube and the grid of PMOS tube.When the control signal is high level, NMOS tube saturation conduction,PMOS tube cut-off, video output DATA by the first controllable switch K1 ..., Kx ..., Km be transmitted to small viewing area 31, controlIt makes small viewing area 31 and shows picture.Conversely, when the control signal CTRL is low level, PMOS tube saturation conduction, NMOS tubeCut-off, video export DATA by the second controllable switch KK1 ..., KKx ..., KKm be transmitted to big viewing area 32, thus justThe big progress of viewing area 32 picture is switched to show.
Similarly, when the first controllable switch K1 ..., Kx ..., Km select PMOS tube, and the second controllable switchKK1 ..., KKx ..., KKm is when selecting NMOS tube, processor output controls signal CTRL all the way, passes through driving chipIt is transmitted separately to the grid of NMOS tube and the grid of PMOS tube.When the control signal CTRL is low level, PMOS tube saturationConducting, NMOS tube cut-off, video export DATA by the first controllable switch K1 ..., Kx ..., Km be transmitted to small viewing area31, it controls small viewing area 31 and shows picture.Conversely, when the control signal CTRL is high level, NMOS tube saturation conduction,PMOS tube cut-off, video export DATA by the second controllable switch KK1 ..., KKx ..., KKm be transmitted to big viewing area 32,To show picture by the big viewing area 32.Thus, it is possible to realize that display picture is seamless between two viewing areas 31,32Switching, and the picture of the big display of viewing area 32 is twice that small viewing area 31 shows picture, image display quality is guaranteed.
Certainly, first controllable switch and the second controllable switch can also select three pole of NPN type triode and positive-negative-positivePipe, the present embodiment are not limited in the above citing.
It, can be to big viewing area in the case where not influencing the normal viewing of user in view of the visual persistence phenomenon of human eyeTwo data input pin S1 ', S1 ' ' or Sx ', Sx ' ' or Sm ', Sm ' ' in 32 each group of data input pin carry out timesharingDrive control, to further decrease system power dissipation.
Specifically, two in each group of data input pin can be connected in the m group data input pin of big viewing area 32Setting is respectively corresponded in two bars of branch data lines of a data input pin (S1 ', S1 ' ' or Sx ', Sx ' ' or Sm ', Sm ' ')One Time-sharing control switch Mux1 and the second Time-sharing control switch Mux2, as shown in Figure 5.Also, design driven chip is drawn in a frameIn the display cycle in face, half period before m the first Time-sharing control switch Mux1 of control are connected, m the second Time-sharing controls of controlSecond half of the cycle is connected in switch Mux2.When due to showing picture by big viewing area 32, the same time only has the pixel of halfIt lights, in addition the pixel of half extinguishes, therefore energy consumption when large-size screen monitors display can be significantly reduced, when the continuation of the journey of extending cell phoneBetween.
Similarly, in order to save the pin resource of processor and driving chip, the first Time-sharing control switch Mux1 andTwo Time-sharing control switch Mux2 are it is also preferred that carry out circuit design using the opposite metal-oxide-semiconductor of on-off characteristic.
Specifically, when the first Time-sharing control switch Mux1 selects NMOS tube, the second Time-sharing control switchWhen Mux2 selects PMOS tube, the driving chip can export the grid that driving signal DRV all the way is transmitted separately to the NMOS tubeThe grid of pole and PMOS tube.It is high electricity in half of display cycle before a frame picture that driving chip, which sets the driving signal DRV,It is flat, m the first Time-sharing control switch Mux1 saturation conductions of control, m the second Time-sharing control switch Mux2 cut-offs；And it is drawn in a frameThe driving signal DRV built in rear half of display cycle in face is low level, and m the first Time-sharing control switch Mux1 of control are cutOnly, m the second Time-sharing control switch Mux2 saturation conductions are achieved in the driving of the timesharing to big viewing area 32.
Similarly, when the first Time-sharing control switch Mux1 selects PMOS tube, the second Time-sharing control switch Mux2 choosingWhen with NMOS tube, the driving chip can export driving signal DRV all the way be transmitted separately to the PMOS tube grid andThe grid of NMOS tube.It is low level, control in half of display cycle before a frame picture that driving chip, which sets the driving signal DRV,M processed the first Time-sharing control switch Mux1 saturation conductions, m the second Time-sharing control switch Mux2 cut-offs；And in a frame pictureThe driving signal DRV built in half of display cycle is high level, m the first Time-sharing control switch Mux1 cut-offs of control, m afterwardsSecond Time-sharing control switch Mux2 saturation conduction, the display cycle of each frame picture of reasonable set, utilizes the persistence of vision of human eyePhenomenon reaches energy-saving effect in the case where not influencing user's viewing.
Certainly, the first Time-sharing control switch Mux1 and the second Time-sharing control switch Mux2 can also select on state characteristicOpposite NPN type triode and PNP type triode carry out circuit design, and the present embodiment is not limited in the above citing.
The case where size for big viewing area 32 is other multiple proportions of the size of small viewing area 31, that is, N=3,4 ..., then N number of data in each group of data input pin need to only be inputted in the m group data input pin of big viewing area 32End connects the data line connecting with this group of data input pin by a branch data line respectively, and in each branch dataThe Time-sharing control switch for controlling the branch data line on-off is separately connected in line, that is, match for each group of data input pinSet N number of Time-sharing control switch.Then, the driving chip is designed when controlling the big display of viewing area 32 picture, generates driving letterNumber N number of Time-sharing control for being connected in each group of branches data line of control switchs the timesharing within the display cycle of a frame picture and leadsIt is logical, the driving of the timesharing to big viewing area can be realized.
When using the mobile phone products of the present embodiment, if mobile phone is in shutdown or standby mode, when display module is waken upAfterwards, detection mobile phone first is in folded state or unfolded state；If being in folded state, controls small viewing area 31 and show pictureFace；If being in unfolded state, directly controls big viewing area 32 and show picture.
If user does not begin to use from the standby or off-mode of mobile phone, directly from folded state to expansion shapeState, then driving chip can directly carry out viewing area switching, and display picture is switched to big viewing area 32 from small viewing area 31, realThe seamless connection for now showing picture meets the different use demands of user.
Certainly, the split screen display available actuation techniques of the present embodiment can also be applied has in other in addition to clamshell phoneIn the electronic product of display screen, such as foldable reading equipment, collapsible viewing equipment etc., the present embodiment is to this without specificLimitation.
It should be pointed out that the above description is not intended to limit the present invention, the utility model is also not limited toThe example above, variation that those skilled in the art are made in the essential scope of the utility model retrofit, addAdd or replace, should also belong to the protection scope of the utility model.