CN112860077B - Signal reading method and device of display panel - Google Patents
Signal reading method and device of display panel Download PDFInfo
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- CN112860077B CN112860077B CN202110218754.4A CN202110218754A CN112860077B CN 112860077 B CN112860077 B CN 112860077B CN 202110218754 A CN202110218754 A CN 202110218754A CN 112860077 B CN112860077 B CN 112860077B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/0304—Detection arrangements using opto-electronic means
- G06F3/0308—Detection arrangements using opto-electronic means comprising a plurality of distinctive and separately oriented light emitters or reflectors associated to the pointing device, e.g. remote cursor controller with distinct and separately oriented LEDs at the tip whose radiations are captured by a photo-detector associated to the screen
Abstract
The application relates to a signal reading method and a device of a display panel, the display panel comprises a plurality of light sensing unit rows or columns, signals of the light sensing unit rows or columns are read out through a plurality of frame sampling periods, signals of different light sensing unit rows or columns are read out in different frame sampling periods, and the signal reading method comprises the following steps: sequentially controlling a plurality of light sensing unit rows or columns to be opened in each frame sampling period; in the starting process, sequentially reading signals of the light sensing unit rows or columns corresponding to the frame sampling period; the corresponding signal frame is generated according to the signals read in the same frame sampling period, so that the reading time of each row/column of light sensing units can be prolonged, the requirement of the light sensing display panel with high refresh rate on the reading speed of the light sensing signals is reduced, and the cost of the light sensing signal reading chip is further reduced.
Description
[ field of technology ]
The application relates to the technical field of display, in particular to a signal reading method and device of a display panel.
[ background Art ]
Along with the progress of scientific technology, the display panel integrated with the light sensing function is widely applied to various aspects of life, work and study, and brings more various and more convenient use experiences for users.
At present, the light sensing function of the display panel is generally realized by integrating a light sensing thin film transistor on an array substrate of the display panel, and the light sensing thin film transistor and the pixel thin film transistor can share a gate, so that the light sensing thin film transistor and the pixel thin film transistor can be simultaneously turned on in the same row scanning time.
However, as the refresh rate of the display panel increases, the line scanning time corresponding to the pixels in the display panel is shorter and shorter, so that the time for reading the light sensing signals of one line of light sensing thin film transistors by the light sensing signal reading chip is shortened, that is, the requirement on the reading speed of the light sensing signals is increased, and further, the cost of the light sensing signal reading chip is increased.
[ invention ]
The present invention provides a signal reading method and device for a display panel, so as to reduce the requirement of a high refresh rate light sensing display panel on the reading speed of light sensing signals, and further reduce the cost of the light sensing signal reading chip.
In order to solve the above-mentioned problems, an embodiment of the present application provides a signal reading method of a display panel, where the display panel includes a plurality of light sensing unit rows or columns, signals of the plurality of light sensing unit rows or columns are read out through a plurality of frame sampling periods, and signals of different light sensing unit rows or columns are read out in different frame sampling periods, and the signal reading method includes:
sequentially controlling a plurality of light sensing unit rows or columns to be opened in each frame sampling period;
in the starting process, sequentially reading signals of the light sensing unit rows or columns corresponding to the frame sampling period;
and generating a corresponding signal frame according to the signals read in the same frame sampling period.
Before sequentially reading signals of the sensing unit rows or columns corresponding to the frame sampling period, the method further comprises the following steps:
determining an initial reading row or column corresponding to each frame sampling period from a plurality of light sensing unit rows or columns;
and determining the remaining read rows or columns corresponding to each frame sampling period from the plurality of light sensing unit rows according to the initial read rows or columns and the preset interval value so as to obtain sensing unit rows or columns corresponding to each frame sampling period.
Each frame sampling period comprises a plurality of row or column sampling periods, each row or column sampling period corresponds to one sensing unit row or column, and signals of the corresponding light sensing unit row or column of the frame sampling period are sequentially read, specifically comprising:
and reading signals of the corresponding light sensing unit rows or columns in each row or column sampling period of the frame sampling period in sequence.
After generating the corresponding signal frame according to the signal read in the same frame sampling period, the method further comprises the following steps:
combining the signal frames corresponding to the frame sampling periods into a complete signal frame, wherein the complete signal frame comprises signals output when all light sensing unit rows or columns are opened;
generating a corresponding operation instruction according to the complete signal frame;
and executing corresponding operation according to the operation instruction.
The display panel further includes a plurality of pixel unit rows or columns, each of the light sensing unit rows or columns corresponds to one of the pixel unit rows or columns, and each of the light sensing unit rows or columns is turned on along with the turning on of the corresponding pixel unit row or column, and in each frame sampling period, the light sensing unit rows or columns are sequentially controlled to be turned on, which specifically includes:
in each frame sampling period, a plurality of pixel unit rows or columns are controlled to be turned on in sequence, so that a plurality of light sensing unit rows or columns are turned on in sequence.
In order to solve the above-mentioned problem, an embodiment of the present application further provides a signal reading device of a display panel, where the display panel includes a plurality of light sensing unit rows or columns, signals of the plurality of light sensing unit rows or columns are read out through a plurality of frame sampling periods, signals of different light sensing unit rows or columns are read out in different frame sampling periods, and the signal reading device includes:
the control module is used for sequentially controlling the opening of a plurality of light sensing unit rows or columns in each frame sampling period;
the reading module is used for sequentially reading signals of the light sensing unit rows or columns corresponding to the frame sampling period in the starting process;
the first generation module is used for generating a corresponding signal frame according to the signals read in the same frame sampling period.
Wherein the signal reading device further comprises:
the first determining module is used for determining an initial reading row or column corresponding to each frame sampling period from a plurality of light sensing unit rows or columns;
and the second determining module is used for determining the remaining read rows or columns corresponding to each frame sampling period from the plurality of light sensing unit rows according to the initial read rows or columns and the preset interval value so as to obtain the sensing unit rows or columns corresponding to each frame sampling period.
Each frame sampling period comprises a plurality of row or column sampling periods, each row or column sampling period corresponds to one sensing unit row or column, and signals of the corresponding light sensing unit row or column of the frame sampling period are sequentially read, specifically comprising:
and reading signals of the corresponding light sensing unit rows or columns in each row or column sampling period of the frame sampling period in sequence.
Wherein the signal reading device further comprises:
the merging module is used for merging the signal frames corresponding to the frame sampling periods into a complete signal frame, wherein the complete signal frame comprises signals output when all the light sensing unit rows or columns are opened;
the second generation module is used for generating a corresponding operation instruction according to the complete signal frame;
and the execution module is used for executing corresponding operation according to the operation instruction.
The display panel further comprises a plurality of pixel unit rows or columns, each light sensing unit row or column corresponds to one pixel unit row or column, each light sensing unit row or column is opened along with the opening of the corresponding pixel unit row or column, and the control module is specifically used for:
in each frame sampling period, a plurality of pixel unit rows or columns are controlled to be turned on in sequence, so that a plurality of light sensing unit rows or columns are turned on in sequence.
The beneficial effects of this application are: compared with the prior art, the signal reading method of the display panel comprises a plurality of light sensing unit rows or columns, signals of the light sensing unit rows or columns are read out through a plurality of frame sampling periods, signals of the light sensing unit rows or columns are read out in different frame sampling periods, the signal reading method of the display panel sequentially controls the light sensing unit rows or columns to be opened in each frame sampling period, sequentially reads out signals of the light sensing unit rows or columns corresponding to the frame sampling periods in the opening process, and then generates corresponding signal frames according to the signals read out in the same frame sampling period, so that the reading time of each row/column of light sensing units is prolonged, the requirement of the light sensing display panel with high refresh rate on the reading speed of the light sensing signals is reduced, and the cost of the light sensing signal reading chip is further reduced.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a signal reading method of a display panel according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
fig. 3 is another schematic structural diagram of a display panel according to an embodiment of the present disclosure;
fig. 4 is another flow chart of a signal reading method of a display panel according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a light sensing unit according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a signal reading device of a display panel according to an embodiment of the present disclosure;
fig. 7 is another schematic structural diagram of a signal reading device of a display panel according to an embodiment of the present disclosure.
[ detailed description ] of the invention
The present application is described in further detail below with reference to the drawings and examples. It is specifically noted that the following examples are only for illustration of the present application, but do not limit the scope of the present application. Likewise, the following embodiments are only some, but not all, of the embodiments of the present application, and all other embodiments obtained by one of ordinary skill in the art without inventive effort are within the scope of the present application.
Referring to fig. 1, fig. 1 is a flowchart of a signal reading method of a display panel according to an embodiment of the present application, where the signal reading method of the display panel may include the following steps:
s11: in each frame sampling period, a plurality of light sensing unit rows or columns are controlled to be turned on in sequence.
In particular, as shown in fig. 2, the display panel 20 may include a plurality of light sensing unit rows or columns, for example, 1 st, 2 nd, 3 rd, (n-1) th, n th light sensing unit rows, and each light sensing unit row or column may include a plurality of light sensing units 21.
Currently, in order to achieve a better display effect of the display panel, it is required to increase the refresh rate of the display panel, that is, to increase the number of frames of images displayed per unit time (for example, 1 second) of the display panel. Taking 120Hz as an example, the number of frames of the image to be displayed in the unit time of the corresponding display panel is 120 frames, and the display duration (i.e., one frame sampling period) of the display panel for each frame of image is 1/120≡8.3ms. In the prior art, signals of all the rows or columns (for example, n rows of the light sensing units) in the display panel need to be read in one frame sampling period (for example, t), that is, the time for the light sensing signal reading chip to read signals of one row of the light sensing units is t/n. However, as the refresh rate of the display panel increases, the display time corresponding to each frame of image, that is, the frame sampling period t, is shortened, so that the time t/n for the photo sensing signal reading chip to read the signals of one row of photo sensing units is shortened, and therefore, a photo sensing signal reading chip with a faster reading speed is required, and the cost of the photo sensing signal reading chip is proportional to the reading speed, which results in an increase in the cost of the photo sensing signal reading chip.
In order to solve the above-mentioned technical problem, in this embodiment, the signals of the plurality of light sensing unit rows or columns may be read out through a plurality of frame sampling periods, and the signals of the different light sensing unit rows or columns may be read out in different frame sampling periods. For example, if the signals of the n light sensing unit rows are read out after 3 frame sampling periods, the signals of the 1 st, 4 th, 7 th, and (1+3 x (a-1)) light sensing unit rows may be sequentially read out in the first frame sampling period of the 3 frame sampling periods, the signals of the 2 nd, 5 th, 8 th, and (2+3 x (a-1)) light sensing unit rows may be sequentially read out in the second frame sampling period of the 3 frame sampling periods, and the signals of the 3 rd, 6 th, 9 th, and (3+3 x (a-1)) light sensing unit rows may be sequentially read out in the third frame sampling period of the 3 frame sampling periods. Wherein n and a are positive integers greater than 0, and n is not less than 3a.
Thus, compared with the prior art that signals of all light sensing unit rows or columns (for example, n light sensing unit rows) need to be read in one frame sampling period (for example, t), that is, the time for the light sensing signal reading chip to read signals of one light sensing unit row is t/n, the embodiment can read signals of all light sensing unit rows or columns in a plurality of frame sampling periods (for example, m frame sampling periods), that is, the time for the light sensing signal reading chip to read signals of one light sensing unit row is (t×m)/n, wherein a is an integer and n > m >0, obviously (t×m)/n is greater than t/n, therefore, the signal reading method of the display panel in the embodiment prolongs the reading time of each light sensing unit row, so that the light sensing signal reading chip with low reading speed can meet the signal reading requirement, and the cost of the light sensing signal reading chip can be realized.
Specifically, the 1 st row of light sensing units (i.e., the 1 st light sensing unit row) may be sequentially driven to be turned on to the last 1 st row of light sensing units (i.e., the nth light sensing unit row) according to the first scanning frequency, where f1 represents the first scanning frequency, and t represents the frame sampling period, and then the relationship between the two is: f1 =n/t.
In a specific embodiment, as shown in fig. 3, the display panel 20 may further include a plurality of first signal lines 22 extending along a row direction, a plurality of second signal lines 23 extending along a column direction, and the first signal lines 22 and the second signal lines 23 cross to define a plurality of pixel units 24, and the plurality of pixel units 24 may be divided into a plurality of pixel unit rows 24A along the column direction and a plurality of pixel unit columns along the row direction.
When the first signal line 22 is a scan line and the second signal line 23 is a data line, each of the light sensing unit rows 24A may correspond to one of the pixel unit rows 21A, and each of the light sensing unit rows 24A may be turned on along with the turn-on of the corresponding pixel unit row 21A, and accordingly, the S11 may specifically include: in each frame sampling period, the plurality of pixel cell lines 24A are sequentially controlled to be turned on, so that the plurality of light sensing cell lines 21A are sequentially turned on. In addition, when the first signal line 22 is a data line and the second signal line 23 is a scan line, each light sensing unit column may correspond to one pixel unit column, and each light sensing unit column is turned on along with the turn-on of the corresponding pixel unit column, and accordingly, the S11 may specifically include: in each frame sampling period, a plurality of pixel unit columns are controlled to be turned on in sequence, so that a plurality of light sensing unit columns are turned on in sequence.
It can be understood that the above two cases of extending the scan lines in the display panel 20 along the row direction and extending the scan lines along the column direction correspond to two different placement modes of the display panel 20, and the signal reading methods corresponding to the two different placement modes are the same. Also, for convenience of description and understanding, the present embodiment is described by taking an example in which the scanning lines extend in the row direction (i.e., the first signal lines 22 are scanning lines).
Specifically, as shown in fig. 3, each pixel cell row 24A may be electrically connected to its corresponding one of the scan lines 22 and one of the data lines 23, and when the display panel 20 performs display, scan signals may be sequentially output to the first to last scan lines 22 at the second scan frequency to sequentially drive the 1 st row pixel cell (i.e., the 1 st pixel cell row) to the last 1 st row pixel cell (i.e., the last 1 pixel cell row) to be lit. Wherein, f2 represents the first scanning frequency, t represents the frame sampling period, and the relation between the two is: f1 P/t, where p is the number of pixel unit rows 24A included in the display panel 20. Also, each of the light sensing unit rows 21A may be connected to the same scanning line 22 as its corresponding pixel unit row 24A, such that each of the light sensing unit rows 21A may be turned on with the corresponding pixel unit row 24A turned on.
S12: and in the starting process, sequentially reading signals of the light sensing unit rows or columns corresponding to the frame sampling period.
Each frame sampling period may include a plurality of row or column sampling periods, and each frame sampling period may correspond to a plurality of photo-sensing unit rows or columns. Specifically, each row or column sampling period may correspond to one sensing unit row or column, and S12 may specifically include: and reading signals of the corresponding light sensing unit rows or columns in each row or column sampling period of the frame sampling period in sequence. For example, in a frame sampling period t, x rows of light sensing units need to be read, the frame sampling period t may include x row sampling periods t1, and t may be equal to (x×t1). Specifically, the signal of the corresponding light sensing unit row may be read in the i-th row sampling period of the frame sampling period t.
In one embodiment, to obtain the row or column of sensing units corresponding to each frame sampling period, as shown in fig. 4, before S12, the method may further include:
s14: the initial read row or column corresponding to each frame sampling period is determined from a plurality of light sensing unit rows or columns.
S15: and determining the remaining read rows or columns corresponding to each frame sampling period from the plurality of light sensing unit rows according to the initial read rows or columns and the preset interval value so as to obtain sensing unit rows or columns corresponding to each frame sampling period.
The preset interval value is used for indicating how many light sensing unit rows/columns are each spaced to read signals of one light sensing unit row/column, and can be specifically set according to needs.
Specifically, when the preset interval value is equal to (m-1), that is, the signal of one photo-sensing unit row/column is read only every interval (m-1) of photo-sensing unit rows/columns, the signal corresponding to the n photo-sensing unit rows needs to be read over m frame sampling periods, and then the r-th photo-sensing unit (i.e., the r-th photo-sensing unit row) of the initial reading row corresponding to the (m×1) +r-th frame sampling period can be determined, where j is greater than or equal to 1, n > m >1, m is greater than or equal to r is greater than or equal to 1, j, m, n and r are integers. Taking m equal to 3 as an example, the initial read rows corresponding to the 1 st row of photo-sensing units (i.e., the 1 st row of photo-sensing units) in the (3 x (j-1) +1) th frame sampling period may be all of the 1 st row of photo-sensing units, the 2 nd row of photo-sensing units (i.e., the 2 nd row of photo-sensing units) in the (2 x (j-1) +2) th frame sampling period may be all of the 2 nd row of photo-sensing units (i.e., the 3 nd row of photo-sensing units), and the initial read rows corresponding to the 3 rd, 6, 9, (3 x (j-1) +3) th frame sampling period may be all of the 3 rd row of photo-sensing units (i.e., the 3 rd row of photo-sensing units).
Further, the remaining read actions corresponding to the (m-1) +r) th frame sampling period may be determined as (m-1+r), (m-2+r), (m-3+r), (m-1) +r) (m-k+r) th photo-sensing element row, i.e., the sensing element actions corresponding to the (m-1) +r) th frame sampling period are r, (m-1+r), (m-2+r), (m-3+r), (m-k+r), where k is an integer, and (m-k+r) is not greater than n. Taking m as 3 as an example, the light sensing unit rows corresponding to the 1 st, 4 th, 7 th, and (3 x (j-1) +1 th frame sampling periods may be the 1 st, 4 th, 7 th, and (3 x k+1) th light sensing unit rows, the 2 nd, 5 th, 8 th, and the frame sampling periods may be the (3 x k+2) th light sensing unit rows, and the 3 x 6, 9 th, the frame sampling periods may be the (3 x (j-1) +3) th light sensing unit rows, and the (3 x k+3) th light sensing unit rows may be the (3 x, 6, 8).
It will be understood that when the preset interval value is equal to (m-1), each row or column sampling period corresponding to each frame sampling period may include the on time of the consecutive m rows of light sensing units, but the light sensing signal reading chip only reads the signal output by one row of light sensing units in the on time of the consecutive m rows of light sensing units, and resets the remaining on time of the remaining rows of light sensing units, and does not read the signal output by any row of light sensing units.
S13: and generating a corresponding signal frame according to the signals read in the same frame sampling period.
As shown in fig. 4, after S13, the method may further include:
s16: and combining the signal frames corresponding to the frame sampling periods into a complete signal frame, wherein the complete signal frame comprises signals output when all the light sensing unit rows or columns are opened.
Specifically, the signal frame corresponding to each frame sampling period may include signals of all light sensing unit rows corresponding to the frame sampling period. When the signals of the light sensing unit rows or columns in the display panel are read out through m frame sampling periods, one complete signal frame may include signals of all light sensing unit rows or columns read out in m frame sampling periods that are consecutive in time.
S17: and generating a corresponding operation instruction according to the complete signal frame.
S18: and executing corresponding operation according to the operation instruction.
Specifically, the coordinates of the illuminated area of the display panel may be determined according to the above complete signal frame, then it may be determined whether the coordinates are located in the coordinate range of a certain icon or control of the current display interface, if yes, the icon or control is defined as an active area, if no, a cursor or light spot with a suitable size or other marks capable of identifying the area where the coordinates are located are displayed in the coordinates and the corresponding display area around the coordinates, and the display area covered by the marks is defined as an active area, then the defined active area may be highlighted to display the selected area to the user, and a corresponding operation instruction may be generated based on the active area, where the operation instruction may include clicking the active area, clicking the active area for a long time, sliding operation in all directions with the active area as a starting position, and then the corresponding operation may be performed according to the above operation instruction, for example, clicking the icon opens the corresponding application, sliding the page from right to left, zooming in the area covered by sliding from bottom to top, and the like.
Therefore, under the condition that the refresh rate of the display panel is not reduced, the point reporting rate of the light sensing signals (namely, the number of times of reporting the coordinates of the irradiated area to the display panel per second) is reduced, so that the reading line time of the light sensing signal reading chip is prolonged, the requirement of the display panel on the reading rate of the light sensing signal reading chip can be reduced, and the cost of the light sensing signal reading chip is reduced.
In the above embodiment, the photo-sensing unit 21 may be a circuit having photo-sensing performance such as 2T1C, 3T1C, 4T1C, etc. Taking the photo-sensing unit 21 as a 2T1C circuit as an example, as shown in fig. 5, the photo-sensing unit 21 may include a photo-sensing thin film transistor M1, a storage capacitor Cst, an opening photo-sensing thin film transistor M2, and a read signal line Readout line electrically connected to a photo-sensing signal reading chip. Specifically, the gate and the drain of the light-sensitive thin film transistor M1 are connected to the dc voltages SVGG and SVDD, which are in a continuous light-sensitive state, and the higher the light intensity is, the larger the leakage current is, and the more charges are accumulated in the corresponding storage capacitor Cst, so as to realize conversion from an optical signal to an electrical signal. The switch thin film transistor M2 is periodically turned on, i.e. the charge in the storage capacitor Cst is periodically released, and the released charge can enter a corresponding channel in the photo sensing signal reading chip ROIC through the reading signal line Readout line to be collected and processed, and then the signal is presented to the display panel through a series of subsequent processes. For example, when a laser spot is projected onto the display panel, the light sensing unit covered by the laser spot generates more light-induced charges, and the display panel can display clicking, drawing and other actions at the position of the light sensing unit through subsequent processes of signal transmission, processing, rendering and the like.
Specifically, the display panel 20 may further include an array substrate and/or a color film substrate, the light sensing unit 21 may be specifically integrated in the array substrate or the color film substrate of the display panel 20, and in some embodiments, the light sensing unit 21 may be further hung on a glass substrate of the display panel 20. It will be appreciated that the light sensing unit 21 may be integrated on the display panel 20 in different ways as desired.
Specifically, taking the light sensing units 21 integrated in the array substrate of the display panel 20 as shown in fig. 3, each light sensing unit row 21A may be integrated in its corresponding pixel unit row 24A, for example, one light sensing unit 21 may be disposed every 3 rows/2 columns of pixel units. It will be appreciated that the above-described light sensing units 21 may be disposed in rows or columns of pixel units on the array substrate using different placement positions and placement densities as desired. In one embodiment, for example, a 65 inch, ultra high definition, 4K (resolution 3840 x 2160) display panel, a light sensing unit may be arranged every 5 rows/5 columns of pixel units in order to ensure that the display panel has sufficient light sensing accuracy.
In addition, in the embodiment, the pixel units 24 and the photo-sensing units 21 arranged in the same row in the display panel 20 may share the gate, that is, the switching thin film transistor M2 in each photo-sensing unit 21 may share the gate with the switching thin film transistor in the adjacent pixel unit 24 arranged in the same row, so as to realize that the pixel units 24 and the photo-sensing units 21 arranged in the same row are electrically connected to the same scan line 22, so that each photo-sensing unit row 21A may be turned on along with the turn-on of the corresponding pixel unit row 24A.
Compared with the prior art, the signal reading method of the display panel in the embodiment comprises a plurality of light sensing unit rows or columns, signals of the light sensing unit rows or columns are read out through a plurality of frame sampling periods, signals of the light sensing unit rows or columns are read out in different frame sampling periods, the signal reading method of the display panel sequentially controls the light sensing unit rows or columns to be opened in each frame sampling period, sequentially reads out signals of the light sensing unit rows or columns corresponding to the frame sampling periods in the opening process, and then generates corresponding signal frames according to the signals read out in the same frame sampling period, so that the reading time of each row/column of light sensing units can be prolonged, the requirement of the light sensing display panel with high refresh rate on the reading speed of the light sensing signals is reduced, and the cost of the light sensing signal reading chip is further reduced.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a signal reading device of a display panel according to an embodiment of the disclosure. The signal reading device 50 of the display panel includes:
(1) Control module 51
The control module 51 is configured to sequentially control the plurality of light sensing unit rows or columns to be turned on in each frame sampling period.
In this embodiment, the display panel includes a plurality of rows or columns of light sensing units, where signals of the plurality of rows or columns of light sensing units are read out through a plurality of frame sampling periods, and signals of different rows or columns of light sensing units are read out in different frame sampling periods.
Specifically, the display panel may further include a plurality of pixel unit rows or columns, each of the light sensing unit rows or columns may correspond to one of the pixel unit rows or columns, and each of the light sensing unit rows or columns may be turned on along with the turn-on of the corresponding pixel unit row or column. Accordingly, the control module 51 may be specifically configured to: in each frame sampling period, a plurality of pixel unit rows or columns are controlled to be turned on in sequence, so that a plurality of light sensing unit rows or columns are turned on in sequence.
(2) Reading module 52
The reading module 52 is configured to sequentially read signals of the light sensing unit rows or columns corresponding to the frame sampling period during the start-up process.
Specifically, each frame sampling period may include a plurality of row or column sampling periods, and each row or column sampling period may correspond to one sensing unit row or column. Accordingly, the reading module 52 may be specifically configured to: and in the starting process, reading signals of the corresponding light sensing unit rows or columns in each row or column sampling period of the frame sampling period in sequence.
(3) The first generation module 53
The first generating module 53 is configured to generate a corresponding signal frame according to the signals read in the same frame sampling period.
In one embodiment, to determine the initial read row or column corresponding to each frame sampling period, as shown in fig. 7, the signal reading apparatus 50 may further include:
(4) First determination module 54
A first determining module 54 is configured to determine a start read row or column corresponding to each frame sampling period from a plurality of rows or columns of light sensing units.
(5) The second determination module 55
The second determining module 55 is configured to determine, from the plurality of light sensing unit rows, a remaining read row or column corresponding to each frame sampling period according to the start read row or column and the preset interval value, so as to obtain a sensing unit row or column corresponding to each frame sampling period.
In another embodiment, as shown in fig. 7, the signal reading apparatus 50 may further include:
(6) Merging module 56
The combining module 56 is configured to combine the signal frames corresponding to the multiple frame sampling periods into a complete signal frame, where the complete signal frame includes signals output when all the light sensing unit rows or columns are turned on.
(7) The second generation module 57
The second generating module 57 is configured to generate a corresponding operation instruction according to the complete signal frame.
(8) Execution module 58
And the execution module 58 is used for executing corresponding operations according to the operation instructions.
In the implementation, each module may be implemented as an independent entity, or may be combined arbitrarily, and implemented as the same entity or a plurality of entities, where the implementation of each module may refer to the foregoing method embodiment, and the specific beneficial effects that may be achieved may refer to the beneficial effects in the foregoing method embodiment, which are not described herein again.
In contrast to the prior art, the signal reading device of the display panel in this embodiment includes a plurality of light sensing unit rows or columns, signals of the plurality of light sensing unit rows or columns are read out through a plurality of frame sampling periods, signals of the different light sensing unit rows or columns are read out in different frame sampling periods, the signal reading device of the display panel includes a control module, for sequentially controlling the plurality of light sensing unit rows or columns to be turned on in each frame sampling period, a reading module, for sequentially reading signals of the light sensing unit rows or columns corresponding to the frame sampling period in the turning-on process, and a first generating module, for generating corresponding signal frames according to the signals read out in the same frame sampling period, thereby being capable of prolonging the reading time of each row/column of light sensing units, reducing the requirement of the light sensing display panel with high refresh rate on the reading speed of the light sensing signals, and further reducing the cost of the light sensing signal reading chip.
Those of ordinary skill in the art will appreciate that all or a portion of the steps of the various methods of the above embodiments may be performed by instructions, or by instructions controlling associated hardware, which may be stored in a computer-readable storage medium and loaded and executed by a processor. To this end, an embodiment of the present application provides a storage medium storing a plurality of instructions that can be loaded by a processor to perform the steps of any one of the embodiments of the signal reading method for a display panel provided by the embodiment of the present invention.
Wherein the storage medium may include: read Only Memory (ROM), random access Memory (RAM, random Access Memory), magnetic or optical disk, and the like.
The steps in any embodiment of the signal reading method for a display panel provided in the embodiment of the present application may be executed due to the instructions stored in the storage medium, so that the beneficial effects that can be achieved by any signal reading method for a display panel provided in the embodiment of the present application may be achieved, which are detailed in the previous embodiments and are not described herein again.
The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.
Claims (8)
1. The signal reading method of the display panel is characterized in that the display panel comprises a plurality of light sensing unit rows or columns, signals of the light sensing unit rows or columns are read out through a plurality of frame sampling periods, signals of the light sensing unit rows or columns are read out in different frame sampling periods, and the frame sampling periods are display time lengths of one frame of image when the display panel displays the image with the frame as a period, and the signal reading method comprises the following steps:
sequentially controlling the opening of the plurality of light sensing unit rows or columns in each frame sampling period;
in the starting process, sequentially reading signals of the light sensing unit rows or columns corresponding to the frame sampling period;
generating a corresponding signal frame according to the signals read in the same frame sampling period;
before the signals of the sensing unit rows or columns corresponding to the frame sampling period are sequentially read, the method further comprises the steps of:
determining a starting reading row or column corresponding to each frame sampling period from the plurality of light sensing unit rows or columns;
and determining the remaining read rows or columns corresponding to each frame sampling period from the plurality of light sensing unit rows according to the initial read rows or columns and preset interval values to obtain the sensing unit rows or columns corresponding to each frame sampling period, wherein the preset interval values are used for representing how many light sensing unit rows/columns are used for reading signals of one light sensing unit row/column every interval, and the number of the light sensing unit rows or columns corresponding to each frame sampling period is a plurality.
2. The method for reading signals of a display panel according to claim 1, wherein each frame sampling period includes a plurality of row or column sampling periods, and each row or column sampling period corresponds to one of the sensing unit rows or columns, and the sequentially reading signals of the light sensing unit rows or columns corresponding to the frame sampling period specifically includes:
and reading signals of the corresponding light sensing unit row or column in each row or column sampling period of the frame sampling period in turn.
3. The signal reading method of a display panel according to claim 1, further comprising, after the generating of the corresponding signal frame from the signals read in the same frame sampling period:
combining the signal frames corresponding to the frame sampling periods into a complete signal frame, wherein the complete signal frame comprises signals output when all light sensing unit rows or columns are opened;
generating a corresponding operation instruction according to the complete signal frame;
and executing corresponding operation according to the operation instruction.
4. The method for reading a signal of a display panel according to claim 1, wherein the display panel further comprises a plurality of pixel unit rows or columns, each of the light sensing unit rows or columns corresponds to one of the pixel unit rows or columns, and each of the light sensing unit rows or columns is turned on along with the turn-on of the corresponding pixel unit row or column, and the sequentially controlling the plurality of light sensing unit rows or columns to be turned on in each of the frame sampling periods, specifically comprises:
and in each frame sampling period, sequentially controlling the plurality of pixel unit rows or columns to be opened so as to enable the plurality of light sensing unit rows or columns to be sequentially opened.
5. The signal reading device of a display panel, characterized in that the display panel includes a plurality of light sensing unit rows or columns, the signals of the plurality of light sensing unit rows or columns are read out through a plurality of frame sampling periods, different frame sampling periods read out the signals of different light sensing unit rows or columns, the frame sampling periods are display durations of the display panel for a frame image when the display panel displays the image with the frame as a period, the signal reading device includes:
the control module is used for sequentially controlling the opening of the plurality of light sensing unit rows or columns in each frame sampling period;
the reading module is used for sequentially reading signals of the light sensing unit rows or columns corresponding to the frame sampling period in the starting process;
the first generation module is used for generating a corresponding signal frame according to the signals read in the same frame sampling period;
wherein the signal reading device further comprises:
the first determining module is used for determining a starting reading row or column corresponding to each frame sampling period from the plurality of light sensing unit rows or columns;
and the second determining module is used for determining the remaining read rows or columns corresponding to each frame sampling period from the plurality of light sensing unit rows according to the initial read rows or columns and preset interval values so as to obtain the sensing unit rows or columns corresponding to each frame sampling period, wherein the preset interval values are used for representing how many light sensing unit rows/columns are used for reading signals of one light sensing unit row/column every interval, and the number of the light sensing unit rows or columns corresponding to each frame sampling period is a plurality.
6. The signal reading apparatus of claim 5, wherein each frame sampling period includes a plurality of row or column sampling periods, and each row or column sampling period corresponds to one of the sensing unit rows or columns, and the sequentially reading signals of the light sensing unit rows or columns corresponding to the frame sampling period specifically includes:
and reading signals of the corresponding light sensing unit row or column in each row or column sampling period of the frame sampling period in turn.
7. The signal reading apparatus of a display panel according to claim 5, further comprising:
the merging module is used for merging the signal frames corresponding to the frame sampling periods into a complete signal frame, wherein the complete signal frame comprises signals output when all light sensing unit rows or columns are started;
the second generation module is used for generating a corresponding operation instruction according to the complete signal frame;
and the execution module is used for executing corresponding operation according to the operation instruction.
8. The signal reading apparatus of claim 5, wherein the display panel further comprises a plurality of pixel unit rows or columns, each of the light sensing unit rows or columns corresponds to one of the pixel unit rows or columns, and each of the light sensing unit rows or columns is turned on with the corresponding pixel unit row or column turned on, and the control module is specifically configured to:
and in each frame sampling period, sequentially controlling the plurality of pixel unit rows or columns to be opened so as to enable the plurality of light sensing unit rows or columns to be sequentially opened.
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| CN107644613B (en) * | 2017-10-16 | 2019-11-19 | 京东方科技集团股份有限公司 | Display driving method, display drive apparatus and display module |
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