CN112201193A - Driving method and driving circuit of display panel and display device - Google Patents
Driving method and driving circuit of display panel and display device Download PDFInfo
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- CN112201193A CN112201193A CN202011131110.3A CN202011131110A CN112201193A CN 112201193 A CN112201193 A CN 112201193A CN 202011131110 A CN202011131110 A CN 202011131110A CN 112201193 A CN112201193 A CN 112201193A
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
Abstract
The invention discloses a driving method, a driving circuit and a display device of a display panel, relating to the technical field of display; a touch sensing area in the display panel covers a plurality of sub-pixels; in one frame of picture display, the non-lighting stage of the display stage in the display panel comprises a first non-lighting stage and at least one second non-lighting stage, and the lighting stage comprises a first lighting stage and at least one second lighting stage; the first non-luminous stage, the first luminous stage and the second non-luminous stage are continuous; the first non-light emitting stage includes a scan signal input stage; the driving method comprises the following steps: in one frame of picture display, the display stage of continuously scanned M rows of sub-pixels in one frame of picture display comprises at least 2 detection time domains; and the detection time domain is positioned after the scanning signal input stage, and the detection time domain is at least partially overlapped with the overlapped area of the non-lighting stages of the sub-pixels of the M rows, and/or the detection time domain is at least partially overlapped with the overlapped area of the lighting stages of the sub-pixels of the M rows.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a driving method, a driving circuit, and a display device for a display panel.
Background
In the prior art, an embedded touch display screen becomes the mainstream, a display panel with a touch function is mostly used for wearing products, and currently, a touch display screen for wearing is mostly driven by dimming (brightness adjustment mode) in consideration of an ALS (ambient light sensor) function; however, in the conventional touch design, the situation of dimming driving is not considered, and no special design is made for the conventional touch design, so that in order to avoid the interference of the touch sensing signal, the touch sensing needs to be performed at a specific time, for example, the front porch area and the rear porch area are selected for detection. Therefore, it is desirable to provide a new driving method for a display panel to increase the touch sensing time and improve the touch sensing effect.
Disclosure of Invention
In view of the above, the present invention provides a driving method, a driving circuit and a display device for a display panel, so as to solve the problems of short touch sensing time and low touch sensing performance and efficiency of the current in-cell touch display screen.
In a first aspect, the present application provides a driving method for a display panel, where the display panel includes a plurality of sub-pixels arranged in an array and a plurality of touch sensing areas, and at least one of the touch sensing areas covers the plurality of sub-pixels; the display panel comprises a display stage;
in one frame of picture display, the display stage comprises a non-light-emitting stage and a light-emitting stage which are continuously and alternately arranged, the non-light-emitting stage comprises a first non-light-emitting stage and at least one second non-light-emitting stage, and the light-emitting stage comprises a first light-emitting stage and at least one second light-emitting stage; wherein the first non-emission phase, the first emission phase and the second non-emission phase are consecutive; the first non-emission phase includes a scan signal input phase;
the driving method includes:
in the one-frame picture display, the display phase of the continuously scanned M rows of the sub-pixels in the one-frame picture display comprises at least 2 detection time domains;
the detection time domains in the one frame of picture are all located after the scanning signal input stage, the detection time domains and the areas of the sub-pixels with overlapped non-light-emitting stages of M rows at least partially coincide, and/or,
the detection time domain and the region where the light emission phases of the M rows of the sub-pixels overlap at least partially coincide.
In a second aspect, the present application provides a driving circuit of a display panel for driving the display panel.
In a third aspect, the present application provides a display device comprising the display panel.
Compared with the prior art, the driving method, the driving circuit and the display device of the display panel provided by the invention at least realize the following beneficial effects:
the application provides a driving method, a driving circuit and a display device of a display panel, in one frame of picture display of the display panel, the display stage comprises a plurality of non-luminous stages and a plurality of luminous stages which are continuously and alternately arranged, the application comprises a plurality of detection time domains in one frame of picture display, and at least part of overlapped areas of the detection time domains and the non-luminous stages of a plurality of rows of sub-pixels which are continuously scanned are overlapped, and/or at least part of overlapped areas of the detection time domains and the luminous stages of a plurality of rows of sub-pixels which are continuously scanned are overlapped, thereby being beneficial to increasing the touch sensing time of the display screen, improving the performance and the efficiency of touch sensing, and being beneficial to improving the problems of overlarge noise and poor effect of touch sensing of an embedded touch display panel.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic view of a display panel according to an embodiment of the present disclosure;
fig. 2 is a driving timing diagram of a display panel according to an embodiment of the present disclosure;
fig. 3 is a timing diagram illustrating another driving method of a display panel according to an embodiment of the present disclosure;
fig. 4 is a timing diagram illustrating a further driving of the display panel according to the embodiment of the present disclosure;
fig. 5 is a timing diagram illustrating another driving method of a display panel according to an embodiment of the present disclosure;
fig. 6 is a timing diagram illustrating a further driving of the display panel according to the embodiment of the present disclosure;
FIG. 7 is an enlarged schematic view of area C of FIG. 1 according to an embodiment of the present disclosure;
fig. 8 is a schematic diagram of a driving circuit in a display panel according to an embodiment of the present disclosure;
fig. 9 is a schematic view of a display device according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the prior art, the conventional touch design does not consider the situation of dimming driving, and is not specially designed for the situation, so that in order to avoid the touch sensing signal from being interfered, the touch sensing needs to be performed at a specific time, for example, the front porch area and the rear porch area are selected for detection.
In view of the above, the present invention provides a driving method, a driving circuit and a display device for a display panel, so as to solve the problems of short touch sensing time and low touch sensing performance and efficiency of the current in-cell touch display screen.
Fig. 1 is a schematic view of a display panel according to an embodiment of the present disclosure, and referring to fig. 1, the present disclosure provides a driving method of a display panel, in which a display panel 100 includes a plurality of sub-pixels 10 arranged in an array and a plurality of touch sensing regions 20, and at least one touch sensing region 20 covers the plurality of sub-pixels 10; the display panel 100 includes a display stage;
fig. 2 is a driving timing diagram of a display panel according to an embodiment of the present disclosure, fig. 3 is another driving timing diagram of the display panel according to the embodiment of the present disclosure, fig. 4 is another driving timing diagram of the display panel according to the embodiment of the present disclosure, fig. 5 is yet another driving timing diagram of the display panel according to the embodiment of the present disclosure, please refer to fig. 2-5, in a Frame display (a Frame), a display phase includes a non-emitting phase 21 and an emitting phase 22 that are continuously and alternately arranged, the non-emitting phase 21 includes a first non-emitting phase 211 and at least one second non-emitting phase 212, and the emitting phase 22 includes a first emitting phase 221 and at least one second emitting phase 222; wherein the first non-emission period 211, the first emission period 221 and the second non-emission period 212 are consecutive; the first non-emission period 211 includes a SCAN signal input period (SCAN);
the driving method comprises the following steps:
in one Frame of display (one Frame), the display phase of the M rows of sub-pixels 10 scanned continuously in one Frame of display (one Frame) includes at least 2 detection time domains (for example, when TP1/TP2 shown in fig. 4 is a low level potential, that is, a detection time domain for touch sensing of the display panel 100);
after the SCAN signal input stage (as shown in fig. 5, when SCAN1, SCAN2 and SCAN3 are at low level, i.e. SCAN signal input is performed to the sub-pixels of the corresponding row in the display panel 100), the detection time domains (TP1/TP2 is at low level) in one frame are all located at the same time, and/or the regions 210 where the detection time domains (TP1 is at low level) and the non-emission stages 21 of the sub-pixels 10 of the M rows are overlapped at least partially coincide with each other, and/or,
the detection time domain (TP2 low) at least partially coincides with the region 220 where the emission phases 22 of the M rows of sub-pixels 10 overlap.
Specifically, referring to fig. 1, the present application provides a driving method for a display panel 100, where the display panel 100 includes a plurality of sub-pixels 10 arranged in an array and a plurality of touch sensing areas 20, the display panel 100 may be an in-cell touch display panel, and a region where one touch sensing area 20 is located includes a plurality of sub-pixels 10, for example, a region where one touch sensing area 20 is located is a region where 3 rows, 4 rows, and 5 rows (i.e., a plurality of rows) of sub-pixels 10 are located. Fig. 1 of the present application only shows an embodiment in which one touch-sensing region 20 covers 2 rows or multiple rows of sub-pixels 10, but the number of rows or even columns of sub-pixels 10 covered by one touch-sensing region 20 is not particularly limited, and can be adjusted accordingly according to actual design requirements.
Referring to fig. 2 to 5, the display panel 100 provided in the present application includes a display phase for displaying a Frame, and in one Frame of the Frame (one Frame), the display phase includes a non-light-emitting phase 21 and a light-emitting phase 22 that are continuously and alternately arranged, wherein the non-light-emitting phase 21 may include a first non-light-emitting phase 211 and at least one second non-light-emitting phase 212, for example, and the light-emitting phase 22 may include a first light-emitting phase 221 and at least one second light-emitting phase 222, for example; and the first non-emission period 211, the first emission period 221 and the second non-emission period 212 are continuous. That is, in one Frame display (a Frame), the display phase is, for example, as shown in fig. 2 or fig. 3, and may include a first non-light-emitting phase 211, a first light-emitting phase 221, a second non-light-emitting phase 212, and a second light-emitting phase 222; for example, as shown in fig. 4, the lighting device may also include a first non-lighting phase 211, a first lighting phase 221, a second non-lighting phase 212, a second lighting phase 222, a second non-lighting phase 212, and a second lighting phase 222, where the number of the second non-lighting phase 212 and the second lighting phase 222 in succession and alternately is not specifically limited in this application, but it is required to satisfy that the second non-lighting phase 212 and the second lighting phase 222 appear as a whole, that is, a Frame starts with the first non-lighting phase 211 and ends with the second lighting phase 222; in practical design, the number of the second non-light-emitting stages 212 and the second light-emitting stages 222 that are continuously and alternately adjusted according to requirements, as long as the display stage in one Frame display includes the first non-light-emitting stage 211 and the first light-emitting stage 221 before the second non-light-emitting stage 212 and the second light-emitting stage 222.
Referring to fig. 5, it should be further noted that, in the display phase of one Frame of picture display, the time region occupied by the first non-light-emitting phase 211 further includes a SCAN signal input phase (as SCAN1, SCAN2, and SCAN3 shown in fig. 5 are low level), since the sub-pixels 10 are not driven to emit light in the first non-light-emitting phase 211, the display effect of the display panel 100 is not adversely affected by the SCAN signal input, and the SCAN signal input is used to drive a corresponding portion of the sub-pixels 10 in the panel for controlling the normal display of the display panel 100.
It should be noted that, in the timing diagrams shown in fig. 2 to fig. 5, the low level driving is taken as an example for description, and in some other embodiments of the present invention, a high level driving mode may also be adopted, which is not specifically limited in this application. Taking fig. 1 and 5 as an example, EMIT1 is used to drive the first row of sub-pixels 10 in M rows of sub-pixels 10 that are scanned successively, drive the sub-pixels 10 in the first row of the display panel 100 to EMIT light when EMIT1 is a low level signal, and control the sub-pixels 10 in the first row of the display panel 100 not to EMIT light when EMIT1 is a high level signal; when the TP1 or TP2 is a low level signal, it is a detection time domain, that is, when the TP1 or TP2 is a low level signal, touch sensing is performed on a corresponding position in the display panel 100; SCAN1 inputs a SCAN signal to the sub-pixels 10 in the first row of the display panel 100 when the signal is low. In fig. 5, the SCAN0 low signal is shown as the power system of the display panel 100.
Referring to fig. 5, in fig. 5, taking an example where one touch-sensing region 20 includes three rows of sub-pixels 10 scanned consecutively, it should be noted that after the three rows of sub-pixels 10 receive the SCAN1, SCAN2, and SCAN3 signals at low level, that is, after the data writing phase for the three rows of sub-pixels 10 is completed, the touch-sensing signal is turned on (TP1/TP2 is at low level), and the touch-sensing signal (TP1/TP2 is at low level) is still in the first non-light-emitting phase 211 and does not reach the first light-emitting phase 221.
Although the display stage includes a plurality of non-light-emitting stages 21 and light-emitting stages 22 that are arranged consecutively and alternately, since the non-light-emitting stages 21 occupy a very small amount of time, it is generally preferable that the non-light-emitting stages 21 occupy less than 30% of the entire display stage in total, and since the time for displaying (one Frame) of a Frame is very short, the non-light-emitting stages 21 appearing between two consecutive light-emitting stages 22 in one Frame display stage are not recognized by the human eye, and the display stage observed by the human eye is in a very bright state; therefore, the display period including the non-light-emitting periods 21 does not affect the normal display of the display panel 100.
In the driving method for the display panel 100, the display phase of the continuously scanned M rows of sub-pixels 10 in one Frame of display includes at least 2 detection time domains, and in the present application, the detection time domains in one Frame of display are all set after the SCAN signal input phase, that is, the detection time domains (TP1/TP2 is low level) are all located after any SCAN signal is low level; specifically, the detection time domain (TP1/TP2 is at low level) may be selectively disposed in the region 210 overlapped by the non-light-emitting periods 21 of the M rows of sub-pixels 10 scanned consecutively, as shown in fig. 2, the timing sequence related to touch sensing only includes the illustrated TP1, and the detection time domain (TP1 is at low level) is disposed in the non-light-emitting period 21, which is equivalent to positioning the detection time domain, i.e., the low-level potential of TP1, in the black state time of the display panel 100, so as to avoid inserting the touch sensing signal in the light-emitting period of the display panel 100, and thus, not to adversely affect the normal display function of the display panel 100; alternatively, referring to fig. 3, the timing sequence related to touch sensing only includes TP2 shown in the figure, and the detection time domain TP2 with low level may be located in the region 220 overlapped by the light-emitting periods 22 of the M rows of sub-pixels 10 scanned continuously, that is, the detection time domain TP2 with low level is placed in the light-emitting time after all the sub-pixels 10 are controlled to emit light in the display period; alternatively, referring to fig. 4 or 5, the timing sequence related to touch sensing includes TP1 and TP2, and at least one detection time domain (TP1 is at low level) is selectively disposed in the region 210 overlapped by the non-light-emitting periods 21 of the M rows of sub-pixels 10 that are continuously scanned, and at least one detection time domain (TP2 is at low level) is selectively disposed in the region 220 overlapped by the light-emitting periods 22 of the M rows of sub-pixels 10 that are continuously scanned. The detection time domain is set in the non-light-emitting stage 21 and/or the light-emitting stage 22 of one Frame of M rows of sub-pixels 10 which are continuously scanned in the display panel 100, so that enough time for touch sensing of the display screen can be ensured, the touch sensing performance and the touch sensing effect can be improved, and the problems of excessive touch sensing noise and poor touch sensing effect of the embedded touch display panel can be improved.
It should be further noted that the mode of each signal driving included in any Frame shown in any of the timing diagrams of fig. 2-5 is the same, so that frames following 1Frame are not fully shown in this application, and a person skilled in the art should be able to deduce subsequent timing diagrams from the fully shown 1 Frame; however, the present application is not limited thereto, for example, one Frame may include 3 touch detections, and the other Frame may include 4 touch detections, which may be correspondingly adjusted and controlled according to actual requirements.
Referring to fig. 2, optionally, in one Frame of picture display (Frame), 1 detection time domain is included in the overlapped region of the first non-lighting stages 211 of the M rows of sub-pixels 10, and at least 1 detection time domain is included in the overlapped region of the second non-lighting stages 212 of the M rows of sub-pixels 10.
Specifically, the display stage of the M rows of sub-pixels 10 in one Frame of display (one Frame) includes at least 2 detection time domains, and when all the detection time domains are located in the non-emission stage 21 of the corresponding sub-pixels 10 in the display stage, for example, the detection time domains may be set in one Frame of display (one Frame) corresponding to the corresponding sub-pixels 10, there are 1 detection time domains located in an area where the first non-emission stage 211 of the M rows of sub-pixels 10 overlaps, that is, the detection time domains start touch sensing on the M rows of sub-pixels 10 after data writing is completed, so that touch sensing can be performed as early as possible in one display stage, which is beneficial to improving efficiency of touch sensing. Meanwhile, at least 1 detection time domain is located in the overlapped region of the second non-light-emitting stage 212 of the M rows of sub-pixels 10, so as to ensure that touch detection is performed at least twice in one Frame of picture display (one Frame).
With such a configuration, the detection time domains, i.e. the low levels of TP1 shown in fig. 2, are all set in the non-light-emitting stage 21, which is equivalent to placing the detection time domains in the black state time of the display panel 100, so that no adverse effect is generated on the normal display of the display panel 100, and the normal effect of touch sensing on the display panel can also be ensured; and it is also ensured that the continuously scanned M rows of sub-pixels 10 at least include 2 detection time domains in one Frame of picture display (one Frame), and the time occupied by each detection time domain is enough, which is beneficial to improving the touch sensing precision and also beneficial to improving the problems of too much noise and poor effect of touch sensing of the in-cell touch display screen.
Referring to fig. 4, optionally, in one Frame display (one Frame), the non-lighting stage 21 includes at least two second non-lighting stages 212,
at least 2 detection time domains are respectively located in the overlapped region of at least two second non-light emitting periods 212 of the M rows of sub-pixels 10.
Specifically, in one Frame of picture display (one Frame), the display phase includes a plurality of non-lighting phases 21 and lighting phases 22 that are continuously and alternately arranged, where the non-lighting phase 21 includes at least two second non-lighting phases 212 in addition to one first non-lighting phase 211, fig. 4 illustrates that three second non-lighting phases 212 are included in one Frame, and at this time, TP2 can be omitted with reference to fig. 4. Since the display phase of the M rows of sub-pixels 10 in the Frame display includes at least 2 detection time domains, for example, when the non-emitting phase 21 only includes two second non-emitting phases 212, for example, the 2 detection time domains that exist may be respectively set in the two second non-emitting phases 212, that is, the 2 detection time domains that exist in the Frame display are respectively located in the overlapping regions of the two second non-emitting phases 212 of the M rows of sub-pixels 10. With such an arrangement, the detection time domains can be set in the non-light-emitting stage 21, so that no adverse effect is generated on the normal display function of the display panel 100, and it is ensured that one Frame includes 2 detection time domains (i.e., the TP1 shown in fig. 4 is at a low level), which is beneficial to improving the performance and efficiency of touch sensing.
It should be noted that the present application does not limit the number of the second non-lighting stages 212 included in the non-lighting stage 21 in one Frame display (one Frame), as long as at least one second non-lighting stage 212 is ensured; moreover, when the non-light-emitting stage 21 includes at least two second non-light-emitting stages 212, since the display stage of the M rows of sub-pixels 10 that need to be continuously scanned in one Frame of the display includes at least 2 detection time domains, it is selectable to respectively locate the at least 2 detection time domains in the overlapped region of the at least two second non-light-emitting stages 212 of the M rows of sub-pixels 10, that is, to set at least part of the detection time domains in the second non-light-emitting stages 212, or to set all the detection time domains in the second non-light-emitting stages 212, which can both avoid adverse effects on the normal display function of the display panel 100 and improve the performance and efficiency of touch sensing.
Referring to fig. 3, optionally, in one Frame of picture display (Frame), 1 detection time domain is included in the overlapped region of the first light-emitting stages 221 of the sub-pixels 10 in the M rows, and at least 1 detection time domain is included in the overlapped region of the second light-emitting stages 222 of the sub-pixels 10 in the M rows.
Specifically, in one Frame of picture display (one Frame), the display phase includes a plurality of non-lighting phases 21 and lighting phases 22 that are continuously and alternately arranged, wherein the lighting phase 22 may include a first lighting phase 221 and at least one second lighting phase 222; since the display phase of the M rows of sub-pixels 10 in one Frame display includes at least 2 detection time domains, the present application may also set all the detection time domains (TP2 is at low level) in the lighting phase 22, for example, 1 detection time domain (TP2 is at low level) is set in the overlapping region of the first lighting phases 221 of the M rows of sub-pixels 10, and the remaining at least 1 detection time domain (TP2 is at low level) is set in the overlapping region of the second lighting phases 222 of the M rows of sub-pixels 10; so that the detection time domains (TP2 is low) are all located in the light emission period after all the M rows of sub-pixels 10 in one continuous scan emit light. The display stage of the continuously scanned M rows of sub-pixels 10 in one Frame of picture display (one Frame) is guaranteed to include at least 2 detection time domains, the detection time domains are set in the stage that the corresponding sub-pixels 10 are all luminous, the situation that the luminous effects of the plurality of luminous stages 22 are different is avoided, the number of detection time domains included in one Frame of picture display (one Frame) is increased, meanwhile, the time required by touch sensing of the display screen is guaranteed, and therefore the performance and the efficiency of touch sensing are improved.
Referring to fig. 4, optionally, in one Frame display (one Frame), the lighting stage 22 includes at least two second lighting stages 222,
at least 2 detection time domains are located in the region where at least two second light emission periods 222 of the M rows of sub-pixels 10 overlap.
Specifically, in one Frame of screen display (one Frame), the display phase includes a plurality of non-lighting phases 21 and lighting phases 22 that are continuously and alternately arranged, wherein the lighting phase 22 includes at least two second lighting phases 222 in addition to one first lighting phase 221. Since the display phase of the M rows of sub-pixels 10 in one Frame display (one Frame) includes at least 2 detection time domains, for example, when the lighting phase 22 only includes two second lighting phases 222, for example, 2 detection time domains (TP2 is low level) that exist may be respectively set in the two second lighting phases 222, that is, the 2 detection time domains that exist in one Frame display (one Frame) are respectively located in the overlapping region of the two second lighting phases 222 of the M rows of sub-pixels 10. By the arrangement, the detection time domain is arranged in the stage that the corresponding sub-pixels 10 emit light, so that the time required by touch sensing of the display screen is ensured, and the performance of the touch sensing is improved.
It should be noted that, in the present application, the number of the second lighting phases 222 included in the lighting phase 22 in one Frame of screen display is not limited, as long as at least one second lighting phase 222 is ensured, for example, fig. 4 of the present application shows that one Frame includes three second lighting phases 222; moreover, when the light-emitting stage 22 includes at least two second light-emitting stages 222, since the display stage of the M rows of sub-pixels 10 that need to be continuously scanned in one Frame of the display includes at least two times of touch sensing, at least 2 detection time domains can be selectively located in the overlapping region of the at least two second light-emitting stages 222 of the M rows of sub-pixels 10, that is, at least part of the detection time domain (TP2 is at low level) is set in the second light-emitting stage 222, or the detection time domains are set in the second light-emitting stage 222, which can both ensure the time required for touch sensing of the display screen, and the performance and efficiency of touch sensing can be improved due to the increase of the number of detection time domains included in one Frame of the display.
Referring to fig. 4 or fig. 5, optionally, in a Frame display (Frame), at least 1 detection time domain is included in the region 210 where the non-lighting stages 21 of the sub-pixels 10 in the M rows overlap, and at least 1 detection time domain is included in the region 220 where the lighting stages 22 of the sub-pixels 10 in the M rows overlap.
Specifically, in one Frame of picture display (one Frame), the display phase includes a plurality of non-lighting phases 21 and lighting phases 22 that are continuously and alternately arranged, where the non-lighting phase 21 includes a first non-lighting phase 211 and at least one second non-lighting phase 212, and the lighting phase 22 includes a first lighting phase 221 and at least one second lighting phase 222; since the display phase of the continuously scanned M rows of sub-pixels 10 in one Frame of picture display (one Frame) includes at least 2 detection time domains, the present application can selectively set at least 1 detection time domain (TP1 is low) in the non-lighting phase 21 and at least 1 detection time domain (TP2 is low) in the lighting phase 22.
The application locates at least 1 detection time domain (TP1 is low) in the region 210 where the non-lighting periods 21 of the M rows of sub-pixels 10 overlap, and locates at least 1 detection time domain (TP2 is low) in the region 220 where the lighting periods 22 of the M rows of sub-pixels 10 overlap; specific examples may be as follows: setting 1 detection time domain in the first non-lighting phase 211 and 1 detection time domain in the first lighting phase 221; or, 1 detection time domain is set in the first non-lighting stage 211, at least 1 detection time domain is set in the corresponding second non-lighting stages 212, at the same time, 1 detection time domain is set in the first lighting stage 221, and/or at least 1 detection time domain is set in the corresponding second lighting stages 222, and so on, which are not listed here.
The present application does not limit the specific setting position when at least 2 detection time domains are located in both the non-light-emitting phase 21 and the light-emitting phase 22, as shown in fig. 4 or fig. 5, and even the detection time domains may be selectively set in the first non-light-emitting phase 211, any one of the second non-light-emitting phases 212, the first light-emitting phase 221, and any one of the second light-emitting phases 222, so as to increase the number of times of touch sensing performed on the display screen, which is beneficial to ensuring the time required by the touch sensing of the display screen, and improve the performance and efficiency of the touch sensing.
Referring to fig. 6, optionally, the number of detection time domains in the region 210 where the non-light-emitting periods 21 of the M rows of sub-pixels 10 overlap is greater than the number of detection time domains in the region 220 where the light-emitting periods 22 of the M rows of sub-pixels 10 overlap.
Specifically, since the detection time domain is set in the first light-emitting stage 221 and/or the second light-emitting stage 222, that is, when the touch sensing for the display screen is located after all the corresponding sub-pixels 10 start to emit light, the difference of the touch sensing response time may have a slight adverse effect on the touch sensing effect in consideration of the different gray scales when the sub-pixels 10 are lit.
Therefore, when the detection time domains are located in both the non-light-emitting period 21 and the light-emitting period 22, an optional manner is provided in the present application, in which the number of the detection time domains (TP1 is at a low level) located in the region 210 where the non-light-emitting periods 21 of the M rows of sub-pixels 10 overlap is greater than the number of the detection time domains (TP2 is at a low level) located in the region 220 where the light-emitting periods 22 of the M rows of sub-pixels 10 overlap, so that most of the detection time domains are located in the non-light-emitting periods 21, the number of the detection time domains located in the light-emitting periods 22 is reduced, and the performance of touch sensing can be correspondingly improved; and the detection time domain is located in both the non-light-emitting stage 21 and the light-emitting stage 22, so that the time required by touch sensing of the display screen is increased, and the touch sensing effect is improved.
Specifically, as shown in fig. 6, in one Frame, the detection phases (TP1/TP2 is at low level) are located in the first non-emission phase 211, the first second emission phase 222, the second non-emission phase 212, and the third second non-emission phase 212, and the number of detection time domains (TP1 is at low level) in the region 210 where the detection phases are located in the non-emission phase 21 overlaps is set to be greater than the number of detection time domains (TP2 is at low level) in the region 220 where the emission phases 22 of the M rows of sub-pixels 10 overlap.
It should be noted that fig. 6 only provides an embodiment in which the number of the detection stages in the non-light-emitting stage 21 is greater than the number of the detection stages in the light-emitting stage 22, but the application does not limit the number, positions, and the like of the detection stages in the non-light-emitting stage 21 and the light-emitting stage 22 included in one Frame, as long as the number of the detection stages in the non-light-emitting stage 21 included in one Frame is greater than the number of the detection stages in the light-emitting stage 22, so as to achieve the purpose of avoiding the adverse effect on the display effect of the display panel.
Fig. 7 is an enlarged schematic view of a region C in fig. 1 according to an embodiment of the present disclosure, and referring to fig. 1 and fig. 7, optionally, any sub-pixel 10 includes at least one light emitting element 11; any touch sensing area 20 covers M rows of sub-pixels 10;
a length of the touch-sensing region 20 along the first direction is M1: m1 is not more than M H, M1 is more than 0;
h is the height of a row of sub-pixels 10 along the first direction; the first direction is a column direction in which the sub-pixels 10 are arranged.
Specifically, the display panel 100 shown in fig. 1 includes a plurality of sub-pixels 10 arranged in an array and a plurality of touch sensing areas 20, wherein, as shown in fig. 7, any sub-pixel 10 includes at least one light emitting device 11, and any touch sensing area 20 can cover, for example, M rows of sub-pixels 10, and the M rows of sub-pixels 10 can be continuously scanned in a Frame display (a Frame).
Along the column direction of the sub-pixels 10, i.e. along the first direction, the length of one touch sensing region 20 is M1, where M1 is not more than M × H, and M1 is greater than 0; h is the height of a row of sub-pixels 10 in the first direction.
That is, for example, when M1 is M × H, the length of one touch sensing region 20 along the first direction is equal to the length of the first row of sub-pixels 10 to the mth row of sub-pixels 10 covered by the touch sensing region along the first direction; at this time, when the touch sensing area 20 performs touch sensing, the detection time domain may be specifically located in a time period when the M rows of sub-pixels 10 are in the non-light-emitting stage 21, and/or the detection time domain is located in a time period when the M rows of sub-pixels 10 are in the light-emitting stage 22. It should be noted that the spacing between two adjacent rows of sub-pixels 10 is ignored here.
Fig. 7 shows only one embodiment in which one touch-sensing region 20 covers four rows of sub-pixels 10, and only one light-emitting element 11 is included in one sub-pixel 10 as an example, but the application does not limit the number of light-emitting elements 11 included in one sub-pixel 10, and does not limit the number of rows of sub-pixels 10 covered by one touch-sensing region 20, and the user can adjust the number accordingly according to the actual situation. In the four rows of sub-pixels 10 shown in fig. 7, the length of one sub-pixel 10 along the first direction is H, and here, the length M1 along the first direction corresponding to the touch sensing region 20 in fig. 7 is H × 4.
Referring to fig. 2 to 6, in the present application, the detection time domain is set in the time period when the sub-pixels 10 corresponding thereto are all emitting light and/or are not emitting light, so that the situation of level signal switching is avoided by detecting the time domain, which is beneficial to ensuring the accuracy of touch sensing, and meanwhile, sufficient detection time can be ensured, thereby improving the performance and effect of touch sensing.
It should be further noted that, in the manner of M1 ═ M × H, the touch sensing regions 20 can be tightly disposed in the entire display panel 100, so that each row of sub-pixels 10 can be covered by the touch sensing region 20, and the disposing density of the touch sensing regions 20 is increased, which is favorable for further improving the touch sensing accuracy of the entire display panel 100; in order to ensure the detection effect of the TP (touch panel), the size of each touch sensing area 20 may be reduced appropriately, for example, the number of rows of the sub-pixels 10 covered by one touch sensing area 20 may be about 50.
It should be noted that, the number of rows of the sub-pixels 10 covered by one touch-sensing region 20 is not specifically limited in the present application, for example, the number of rows of the sub-pixels 10 covered by one touch-sensing region 20 may be smaller than the number of all the sub-pixels 10 that are scanned consecutively and correspond to the sub-pixels 10 in this region, i.e., M1 < M × H may be selected.
Optionally, M ═ 1-duty LN/pulse) - (h1/LF) - (h 2/LF); wherein, duty is a ratio of a time required for the light-emitting stage 22 in one Frame of image display to a total time in one Frame of image display, LN is a total number of rows of all the sub-pixels 10 in the display panel 100, pulse is a number of data writing stages in the total time in one Frame of image display, h1 is a time corresponding to all detection time domains in one touch sensing region 20, LF is a line frequency, and h2 is a time required for turning off the light-emitting element 11 in one touch sensing region 20;
LF 1 s/frequency/total number of rows.
Specifically, the calculation method corresponding to the number of rows of the plurality of rows of sub-pixels 10 scanned continuously is as follows: m ═ 1-duty LN/pulse) - (h1/LF) - (h 2/LF); for example, when the total row number of the sub-pixels 10 is 460, the front and rear lanes 20 and 60Hz, and the touch sensing detects the time for detecting two rows of sub-pixels 10 in one cycle, LF is 1/60/480 ═ 35 μ s, and M is calculated to be 0.3 ═ 240 to 70 μ s/35 μ s to 60ns/35 μ s ≈ 70 rows under the condition of 2pulse 70% duty; in this case, for example, when H is 78 μ M, M1 ≦ 70 ×, 78 ≦ 5460 μ M ≦ 5.46 mm. That is, the length of the touch sensing region 20 along the first direction calculated under the conditions provided in the above embodiments is about equal to or less than 5.46 mm.
It should be noted that the above calculation of the length of the touch sensing region 20 along the first direction being 5.46 mm is only an embodiment provided in the present application, and a user may calculate the number of rows M of the sub-pixels 10 that are continuously scanned according to an actual situation, and further calculate the length of the touch sensing region 20 along the first direction by combining the size of an actual row of the sub-pixels 10 along the first direction.
Referring to fig. 1 and 7, optionally, a length of one touch sensing region 20 along the first direction is M1, where M1 is greater than or equal to 5mm and less than or equal to 5.5 mm.
Specifically, for the display screen commonly used in the future, the present application provides an embodiment in which the length M1 of one touch sensing region 20 along the first direction is optionally in the range of 5mm to 5.5mm, and the number of rows of the continuously scanned sub-pixels 10 corresponding to one touch sensing region 20 is optionally in the range of 65 to 75 rows, that is, 65 ≦ M ≦ 75; and M is a positive integer.
It should be noted that, the number of rows of the sub-pixels 10 covered by one touch-sensing region 20 is not particularly limited in the present application, for example, the number of rows of the sub-pixels 10 covered by one touch-sensing region 20 may be equal to or less than the number of all the sub-pixels 10 corresponding to the sub-pixels 10 in the region that are scanned continuously, and a user may adjust the number of rows accordingly according to needs. The present application is also not limited to the optional range of 5mm to 5.5mm of the length M1 of the touch sensing region 20 along the first direction, and the user can adjust the length of the touch sensing region along the first direction according to design requirements.
Referring to fig. 1, optionally, the distance between any two adjacent touch sensing areas 20 is D, and D is greater than or equal to 150 μm and less than or equal to 200 μm.
Specifically, along the first direction, the distance between any two adjacent touch sensing areas 20 is D, and in the present application, it is preferable that the distance between two adjacent touch sensing areas 20 is at most 1-2 lengths of the sub-pixels 10 along the first direction; for example, the distance between two adjacent touch sensing regions 20 can be selected to be 150 μm-200 μm.
It should be noted that, the present application only provides a preferable range of the distance between two adjacent touch sensing areas 20, but the present application does not limit the distance between two adjacent touch sensing areas 20. Along the first direction, for example, the distance between two touch sensing regions 20 may also be less than or equal to the distance between two adjacent sub-pixels 10, so as to control the touch sensing regions 20 to be arranged more closely, which is beneficial to improving the touch sensing precision in the display panel 100; when the distance between two adjacent touch-sensing regions 20 is too large, for example, larger than the distance between 2 or more than 3 sub-pixels 10 along the first direction, the area between two touch-sensing regions 20 where at least 2-3 rows of sub-pixels 10 exist is not touch-sensed, and the touch-sensing accuracy of the display panel 100 is reduced.
Referring to fig. 1, optionally, the orthographic projection of any touch sensing region 20 on the light-emitting surface of the display panel 100 includes a rectangle, a diamond, a triangle and/or a polygon.
Specifically, in addition to the rectangle shown in fig. 1 covering a plurality of rows of sub-pixels 10, the orthogonal projection of any touch sensing region 20 on the light-emitting surface of the display panel 100 may also be a diamond shape, a triangle shape, and/or a polygon shape, etc., that is, the shape of the touch sensing region 20 may be adjusted accordingly according to the requirement, which is not limited in this application. However, when the light-emitting surface of the display panel 100 is a regular rectangle and the sub-pixels 10 are arranged in an array, the touch sensing regions 20 are directly arranged in such a way that any touch sensing region 20 covers a plurality of rows of sub-pixels 10, which is beneficial to simplifying the arrangement of the touch sensing regions 20 and improving the arrangement density of the touch sensing regions 20, thereby improving the touch sensing performance and efficiency of the whole display panel 100.
In addition, one touch sensing region shown in fig. 1 of the present application is rectangular, and one touch sensing region directly covers a row of sub-pixels and a plurality of rows of sub-pixels, or one touch sensing region can be rectangular, and one touch sensing region only covers a plurality of rows and a plurality of columns (but not the whole row) of sub-pixels; therefore, the number of touch sensing areas in one display panel is increased, and the touch sensing performance of the display panel is improved.
Fig. 8 is a schematic diagram of a driving circuit in a display panel according to an embodiment of the present disclosure, and referring to fig. 8, based on the same inventive concept, the present disclosure further provides a driving circuit of a display panel 100, where the driving circuit is used for driving the display panel 100.
Specifically, the present application further provides a driving circuit for driving the display panel 100, where the driving circuit is a 7T1C circuit commonly used in the art, and the 7T1C circuit controls the sub-pixels 10 in the display panel 100 to emit light row by row, and at the same time controls the execution of touch sensing. The 7T1C circuit conventionally used in the technical field is selected, so that the circuit structure in the display panel 100 is simplified, and the complexity of the circuit structure is reduced; meanwhile, the 7T1C circuit conventionally used in the art can realize touch sensing of the display panel 100, and touch sensing of the display panel 100 including at least two alternately occurring non-light-emitting and two light-emitting states at a display stage (one Frame) in one Frame of a display image is realized, so that time required for touch sensing is increased, a monitoring effect of touch sensing is improved, and a problem of large noise during touch sensing under a screen is also improved.
Fig. 9 is a schematic view of a display device according to an embodiment of the present disclosure, referring to fig. 9, and based on the same inventive concept, the present disclosure further provides a display device 200, where the display device 200 includes a display panel 100. The display panel 100 is any one of the display panels 100 provided in the present application.
It should be noted that, for the embodiments of the display device 200 provided in the embodiments of the present application, reference may be made to the embodiments of the display panel 100, and repeated descriptions are omitted. The display device 200 provided by the present application may be: any product and component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a vehicle-mounted display screen, a navigator and the like.
As can be seen from the above embodiments, the stretchable display panel, the display device and the assembling method thereof provided by the present invention at least achieve the following beneficial effects:
the application provides a driving method, a driving circuit and a display device of a display panel, in one frame of picture display of the display panel, the display stage comprises a plurality of non-luminous stages and a plurality of luminous stages which are continuously and alternately arranged, the application comprises a plurality of detection time domains in one frame of picture display, and at least part of overlapped areas of the detection time domains and the non-luminous stages of a plurality of rows of sub-pixels which are continuously scanned are overlapped, and/or at least part of overlapped areas of the detection time domains and the luminous stages of a plurality of rows of sub-pixels which are continuously scanned are overlapped, thereby being beneficial to increasing the touch sensing time of the display screen, improving the performance and the efficiency of touch sensing, and being beneficial to improving the problems of overlarge noise and poor effect of touch sensing of an embedded touch display panel.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (15)
1. The driving method of the display panel is characterized in that the display panel comprises a plurality of sub-pixels arranged in an array and a plurality of touch sensing areas, and at least one touch sensing area covers the plurality of sub-pixels; the display panel comprises a display stage;
in one frame of picture display, the display stage comprises a non-light-emitting stage and a light-emitting stage which are continuously and alternately arranged, the non-light-emitting stage comprises a first non-light-emitting stage and at least one second non-light-emitting stage, and the light-emitting stage comprises a first light-emitting stage and at least one second light-emitting stage; wherein the first non-emission phase, the first emission phase and the second non-emission phase are consecutive; the first non-emission phase includes a scan signal input phase;
the driving method includes:
in the one-frame picture display, the display phase of the continuously scanned M rows of the sub-pixels in the one-frame picture display comprises at least 2 detection time domains;
the detection time domains in the one frame of picture are all located after the scanning signal input stage, the detection time domains and the areas of the sub-pixels with overlapped non-light-emitting stages of M rows at least partially coincide, and/or,
the detection time domain and the region where the light emission phases of the M rows of the sub-pixels overlap at least partially coincide.
2. The method according to claim 1, wherein 1 of the detection time domains is located in an area where the first non-emission periods of the M rows of the sub-pixels overlap, and at least 1 of the detection time domains is located in an area where the second non-emission periods of the M rows of the sub-pixels overlap in the one-frame display.
3. The method according to claim 1, wherein the non-emission period includes at least two second non-emission periods in the one-frame screen display,
at least 2 of the detection time domains are respectively located in the overlapped region of at least two of the second non-light-emitting periods of the M rows of the sub-pixels.
4. The method according to claim 1, wherein 1 of the detection time domains is located in an area where the first lighting periods of the M rows of the sub-pixels overlap, and at least 1 of the detection time domains is located in an area where the second lighting periods of the M rows of the sub-pixels overlap in the one-frame picture display.
5. The method according to claim 1, wherein the light emission phases include at least two of the second light emission phases in the one-frame screen display,
at least 2 of the detection time domains are located in a region where at least two of the second light emission periods of the M rows of the sub-pixels overlap.
6. The method according to claim 1, wherein at least 1 of the detection time domains is located in a region where the non-emission periods of the M rows of the sub-pixels overlap and at least 1 of the detection time domains is located in a region where the emission periods of the M rows of the sub-pixels overlap in the one-frame display.
7. The method according to claim 6, wherein the number of the detection domains in the region where the non-emission periods of the M rows of the sub-pixels overlap is greater than the number of the detection domains in the region where the emission periods of the M rows of the sub-pixels overlap.
8. The method for driving a display panel according to claim 1, wherein any one of the sub-pixels includes at least one light emitting element; any touch sensing area covers M rows of the sub-pixels;
a length of the touch sensing area along the first direction is M1: m1 is not more than M H, M1 is more than 0;
h is the height of a row of the sub-pixels along the first direction; the first direction is a column direction in which the sub-pixels are arranged.
9. The method for driving a display panel according to claim 8,
m ═ 1-duty LN/pulse) - (h1/LF) - (h 2/LF); wherein duty is a ratio of time required for the light-emitting stage in one frame of image display to total time in one frame of image display, LN is a total number of rows of all the sub-pixels in the display panel, pulse is a number of the data writing stages in the total time in one frame of image display, h1 is time corresponding to all the detection time domains in one touch sensing region, LF is a line frequency, and h2 is time required for turning off the light-emitting element in one touch sensing region;
LF 1 s/frequency/total number of rows.
10. The method as claimed in claim 8, wherein the length of one touch sensing region along the first direction is M1, wherein M1 is 5mm or more and 5.5mm or less.
11. The method for driving a display panel according to claim 1, wherein M is 65. ltoreq. M.ltoreq.75; and M is a positive integer.
12. The method for driving a display panel according to claim 1, wherein a distance between any two adjacent touch sensing areas is D, and D is greater than or equal to 150 μm and less than or equal to 200 μm.
13. The method according to claim 1, wherein an orthogonal projection of any touch sensing region on the light-emitting surface of the display panel comprises a rectangle, a diamond, a triangle and/or a polygon.
14. A driving circuit for a display panel, characterized by being used for driving the display panel as claimed in any one of claims 1 to 13.
15. A display device characterized by comprising the display panel according to claim 14.
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