CN112860077A - Signal reading method and device of display panel - Google Patents
Signal reading method and device of display panel Download PDFInfo
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- CN112860077A CN112860077A CN202110218754.4A CN202110218754A CN112860077A CN 112860077 A CN112860077 A CN 112860077A CN 202110218754 A CN202110218754 A CN 202110218754A CN 112860077 A CN112860077 A CN 112860077A
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Abstract
The application relates to a signal reading method and a device of a display panel, wherein the display panel comprises a plurality of light sensing unit rows or columns, signals of the plurality of light sensing unit rows or columns are read through a plurality of frame sampling periods, and signals of different light sensing unit rows or columns are read in different frame sampling periods, and the signal reading method comprises the following steps: in each frame sampling period, sequentially controlling the rows or the columns of the plurality of light sensing units to be opened; in the starting process, sequentially reading signals of rows or columns of the light sensing units corresponding to the frame sampling period; and generating a corresponding signal frame according to the signals read in the same frame sampling period, thereby prolonging the reading time of each row/column of the 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.
Description
[ technical field ] A method for producing a semiconductor device
The present application relates to the field of display technologies, and in particular, to a method and an apparatus for reading a signal of a display panel.
[ background of the invention ]
With the progress of science and technology, the display panel integrated with the light sensing function is widely applied to various aspects of life, work and study, and brings more and more convenient use experience to users.
Currently, 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 a 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 within the same line scanning time.
However, as the refresh rate of the display panel increases, the scanning time of the rows corresponding to the pixels in the display panel becomes shorter and shorter, which shortens the time for the photo sensing signal reading chip to read the photo sensing signal of one row of the photo sensing thin film transistors, i.e. increases the reading speed requirement for the photo sensing signal, and further increases the cost of the photo sensing signal reading chip.
[ summary of the invention ]
The present application provides a method and an apparatus for reading a signal from a display panel, so as to reduce the requirement of a high refresh rate photo-sensing display panel on the speed of reading a photo-sensing signal, and further reduce the cost of a photo-sensing signal reading chip.
In order to solve the above problem, an embodiment of the present invention provides a signal reading method for 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 through a plurality of frame sampling periods, and signals of different light sensing unit rows or columns are read in different frame sampling periods, the signal reading method includes:
in each frame sampling period, sequentially controlling the rows or the columns of the plurality of light sensing units to be opened;
in the starting process, sequentially reading signals of rows or columns of the light sensing units 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 a starting reading row or column corresponding to each frame sampling period from a plurality of light sensing unit rows or columns;
and determining the residual reading row or column corresponding to each frame sampling period from the plurality of light sensing unit rows according to the initial reading row or column and the preset interval value so as to obtain the sensing unit row or column 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 read in sequence, and the method specifically comprises the following steps:
and reading signals of corresponding rows or columns of the light sensing units in each row or column sampling period of the frame sampling period in sequence.
After generating a corresponding signal frame according to the signal read in the same frame sampling period, the method further includes:
combining signal frames corresponding to a plurality of 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 started;
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 photo-sensing unit row or column corresponds to one pixel unit row or column, each photo-sensing unit row or column is turned on with the turning on of the corresponding pixel unit row or column, and the turning on of the plurality of photo-sensing unit rows or columns is sequentially controlled in each frame sampling period, which specifically includes:
in each frame sampling period, the pixel units are sequentially controlled to be opened in rows or columns, so that the light sensing units are sequentially opened in rows or columns.
In order to solve the above problem, an embodiment of the present invention further provides a signal reading apparatus for a display panel, where the display panel includes a plurality of photo-sensing unit rows or columns, signals of the plurality of photo-sensing unit rows or columns are read through a plurality of frame sampling periods, and signals of different photo-sensing unit rows or columns are read in different frame sampling periods, and the signal reading apparatus includes:
the control module is used for sequentially controlling the opening of the rows or the columns of the plurality of light sensing units 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;
and the first generating module is used for generating a corresponding signal frame according to the signals read in the same frame sampling period.
Wherein, signal reading device still includes:
a first determining module, configured to determine, from a plurality of rows or columns of light sensing units, a starting reading row or column corresponding to each frame sampling period;
and the second determining module is used for determining the residual reading row or column corresponding to each frame sampling period from the plurality of light sensing unit rows according to the initial reading row or column and the preset interval value so as to obtain the sensing unit row or column 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 read in sequence, and the method specifically comprises the following steps:
and reading signals of corresponding rows or columns of the light sensing units in each row or column sampling period of the frame sampling period in sequence.
Wherein, signal reading device still includes:
the merging module is used for merging signal frames corresponding to a plurality of frame sampling periods into a complete signal frame, and the complete signal frame comprises signals output when all the 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.
The display panel further includes a plurality of pixel unit rows or columns, each photo-sensing unit row or column corresponds to one pixel unit row or column, and each photo-sensing unit row or column is turned on with the turning on of the corresponding pixel unit row or column, and the control module is specifically configured to:
in each frame sampling period, the pixel units are sequentially controlled to be opened in rows or columns, so that the light sensing units are sequentially opened in rows or columns.
The beneficial effect of this application is: different from the prior art, the present application provides a signal reading method for a display panel, the display panel includes a plurality of rows or columns of light sensing units, the signals of the rows or the columns of the multiple light sensing units are read through multiple frame sampling periods, the signals of the rows or the columns of the different light sensing units are read in different frame sampling periods, the signal reading method of the display panel controls the on of a plurality of light sensing unit rows or columns in turn in each frame sampling period, and in the starting process, reading the signals of the rows or the columns of the light sensing units corresponding to the frame sampling period in sequence, then, the corresponding signal frame is generated according to the signals read in the same frame sampling period, thereby prolonging the reading time of each row/column of the light sensing units, the requirement of the photoinduction display panel with high refresh rate on the reading speed of the photoinduction signal is reduced, and the cost of the photoinduction signal reading chip is further reduced.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic 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 provided in an embodiment of the present application;
fig. 3 is another schematic structural diagram of a display panel provided in an embodiment of the present application;
fig. 4 is another schematic flow chart illustrating 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 apparatus of a display panel according to an embodiment of the present application;
fig. 7 is another schematic structural diagram of a signal reading apparatus of a display panel according to an embodiment of the present application.
[ detailed description ] embodiments
The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive step are within the scope of the present application.
Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a signal reading method of a display panel according to an embodiment of the present disclosure, where the signal reading method of the display panel may include the following steps:
s11: in each frame sampling period, the light sensing units are sequentially controlled to be turned on in rows or columns.
Specifically, 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, and n light sensing unit rows, and each light sensing unit row or column may include a plurality of light sensing units 21.
At present, in order to achieve better display effect of the display panel, the refresh rate of the display panel needs to be increased, that is, the number of frames of images displayed in a unit time (for example, 1 second) of the display panel needs to be increased. Taking the refresh rate of 120Hz as an example, if the number of frames of images to be displayed in a unit time of the display panel is 120 frames, the display duration (i.e., one frame sampling period) of each frame of image by the display panel is 1/120 ≈ 8.3 ms. In the prior art, it is required to read signals of all rows or columns (e.g., n rows) of the photo-sensing units in the display panel in one frame sampling period (e.g., t), that is, the time for the photo-sensing signal reading chip to read signals of a row of photo-sensing units is t/n. However, as the refresh rate of the display panel increases, the display duration corresponding to each frame of image, i.e. the frame sampling period t, is shortened, so that the time t/n for the optical sensing signal reading chip to read the signals of one row of optical sensing units is shortened, and therefore, the optical sensing signal reading chip with a faster reading speed needs to be used, and the cost of the optical sensing signal reading chip is proportional to the reading speed, so the cost of the optical sensing signal reading chip is increased.
In order to solve the above technical problem, in this embodiment, signals of the plurality of rows or columns of the photo-sensing units may be read through a plurality of frame sampling periods, and signals of different rows or columns of the photo-sensing units may be read in different frame sampling periods. For example, signals of the n photo-sensing unit rows may be set to be read through 3 frame sampling periods, then in a first frame sampling period of the 3 frame sampling periods, signals of the 1 st, 4 th, 7 th,., (1+3 a-1)) photo-sensing unit rows may be sequentially read, in a second frame sampling period of the 3 frame sampling periods, signals of the 2 nd, 5 th, 8 th,., (2+3 a-1)) photo-sensing unit rows may be sequentially read, and in a third frame sampling period of the 3 frame sampling periods, signals of the 3 rd, 6 th, 9 th, (3+3 a-1)) photo-sensing unit rows may be sequentially read. Wherein n and a are positive integers greater than 0, and n is greater than or equal to 3 a.
Thus, compared with the prior art that signals of all rows or columns of the photo sensing units (for example, n rows of the photo sensing units) need to be read in one frame sampling period (for example, t), that is, the time for the photo sensing signal reading chip to read the signals of one row of the photo sensing units is t/n, the embodiment can read the signals of all rows or columns of the photo sensing units in a plurality of frame sampling periods (for example, m frame sampling periods), that is, the time for the photo sensing signal reading chip to read the signals of one row of the photo sensing units is (t × m)/n, wherein a is an integer, n > m >0, and obviously (t × m)/n is greater than t/n, it can be known that the signal reading method of the display panel in the embodiment extends the reading time of each row of the photo sensing units, so that the photo sensing signal reading chip with a low reading speed can meet the signal reading requirement, therefore, the cost of the optical sensing signal reading chip can be reduced.
Specifically, the 1 st row of the photo-sensing units (i.e., the 1 st row of the photo-sensing units) to the last 1 st row of the photo-sensing units (i.e., the nth row of the photo-sensing units) may be sequentially driven to turn on according to a 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 equals n/t.
In one embodiment, as shown in fig. 3, the display panel 20 may further include a plurality of first signal lines 22 extending in the row direction, a plurality of second signal lines 23 extending in the column direction, and a plurality of pixel units 24 defined by the first signal lines 22 and the second signal lines 23 crossing each other, and the plurality of pixel units 24 may be divided into a plurality of pixel unit rows 24A in the column direction and a plurality of pixel unit columns in the row direction.
When the first signal line 22 is a scan line and the second signal line 23 is a data line, each photo-sensing unit row 24A may correspond to a pixel unit row 21A, and each photo-sensing unit row 24A may be turned on along with the turning on of the corresponding pixel unit row 21A, and accordingly, the step S11 may specifically include: in each frame sampling period, the pixel unit rows 24A are sequentially controlled to be turned on, so that the photo-sensing unit rows 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 photo-sensing unit column may correspond to a pixel unit column, and each photo-sensing unit column is turned on along with the turning on of the corresponding pixel unit column, and accordingly, the step S11 may specifically include: in each frame sampling period, the pixel unit rows are sequentially controlled to be started, so that the light sensing unit rows are started in sequence.
It can be understood that the above-mentioned two cases that the scan lines in the display panel 20 extend along the row direction and extend along the column direction correspond to two different placement manners of the display panel 20, and the signal reading methods corresponding to the two cases are the same. Also, for convenience of description and understanding, the embodiment of the present application is described taking as an example that the scanning lines extend in the row direction (that is, the first signal lines 22 are scanning lines).
Specifically, as shown in fig. 3, each pixel unit row 24A may be electrically connected to one scan line 22 and one data line 23 corresponding thereto, and when the display panel 20 performs display, scan signals may be sequentially output to the first to last scan lines 22 according to the second scan frequency to sequentially drive the 1 st row of pixel units (i.e., the 1 st pixel unit row) to the last 1 row of pixel units (i.e., the last 1 pixel unit row) to light up. Where f2 represents the first scanning frequency, and t represents the frame sampling period, the relationship between the two is: f1 is p/t, where p is the number of pixel cell rows 24A included in the display panel 20. Moreover, each photo-sensing unit row 21A and the corresponding pixel unit row 24A thereof may be connected to the same scan line 22, so that each photo-sensing unit row 21A may be turned on with the turning on of the corresponding pixel unit row 24A.
S12: and in the starting process, reading signals of the rows or the columns of the light sensing units corresponding to the frame sampling period in sequence.
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 rows or columns of the photo-sensing units. Specifically, each row or column sampling period may correspond to one sensing unit row or column, and the S12 may specifically include: and reading signals of corresponding rows or columns of the light sensing units in each row or column sampling period of the frame sampling period in sequence. For example, in a frame sampling period t, there are x photo-sensing cell rows to be read, and the frame sampling period t may include x row sampling periods t1, and t may be equal to (x × t 1). Specifically, the signals corresponding to the rows of the photo-sensing units may be read in the ith row sampling period of the frame sampling period t.
In an embodiment, to obtain the row or column of the sensing unit corresponding to each frame sampling period, as shown in fig. 4, before the step S12, the method may further include:
s14: and determining a starting reading row or column corresponding to each frame sampling period from a plurality of light sensing unit rows or columns.
S15: and determining the residual reading row or column corresponding to each frame sampling period from the plurality of light sensing unit rows according to the initial reading row or column and the preset interval value so as to obtain the sensing unit row or column corresponding to each frame sampling period.
The preset interval value is used for representing how many light sensing unit rows/columns are 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, only one row/column of the photo-sensing units is read every interval of (m-1) rows/columns of the photo-sensing units, signals corresponding to the n rows of the photo-sensing units need to be read through m frame sampling periods, and then it can be determined that the starting reading action corresponding to the (m × (j-1) + r) frame sampling period is the r-th row of photo-sensing units (that is, the r-th row of photo-sensing units), where j is greater than or equal to 1, n > m >1, m is greater than or equal to r greater than or equal to 1, and j, m, n, and r are integers. Taking m is equal to 3 as an example, the initial reading lines corresponding to the 1 st, 4 th, 7., (3 x (j-1) +1) frame sampling periods may all be the 1 st line of photo-sensing units (i.e., the 1 st line of photo-sensing units), the initial reading lines corresponding to the 2 nd, 5 th, 8., (3 x (j-1) +2) frame sampling periods may all be the 2 nd line of photo-sensing units (i.e., the 2 nd line of photo-sensing units), and the initial reading lines corresponding to the 3 x (j-1) +3) frame sampling periods may all be the 3 rd line of photo-sensing units (i.e., the 3 rd line of photo-sensing units).
Further, the remaining reading rows corresponding to the (m × 1+ r) frame sampling period may be determined to be the (m × 1+ r), (m × 2+ r), (m × 3+ r), (another., (m × k-1) + r) (m × k + r) photo-sensing unit rows, that is, the (m × 1) + r) frame sampling period corresponding to the (m × r) sensing unit rows may be determined to be the (m × 1+ r), (m × 2+ r), (m × 3+ r), (another., (m × 1+ r) + (m × k-1) + r) (m × k + r) photo-sensing units, where k is an integer and (m × k + r) is not greater than n. Taking m is equal to 3 as an example, the photo sensing unit row corresponding to the 1 st, 4 th, 7 th, & lt3 x (j-1) +1) frame sampling period may be the 1 st, 4 th, 7 th, & lt3 x k +1) photo sensing unit row, the 2 nd, 5 th, 8 th, & lt3 x (j-1) +2) photo sensing unit row corresponding to the frame sampling period may be the 2 nd, 5 th, 8 th, & lt3 x k +2) photo sensing unit row, and the 3 rd, 6 th, 9 th, & lt3 x (j-1) +3) photo sensing unit row corresponding to the frame sampling period may be the 3 rd, 6 th, 8 th, & lt3 x (j-1) +3) photo sensing unit row.
It can be understood that, when the preset interval value is equal to (m-1), each row or column sampling period in each frame sampling period may include the turn-on time of m consecutive rows of photo-sensing units, but the photo-sensing signal reading chip reads the signal output by one row of photo-sensing units only during the turn-on time of the one row of photo-sensing units in the turn-on time of the m consecutive rows of photo-sensing units, and resets the photo-sensing units during the turn-on time of the remaining rows of photo-sensing units, and does not read the signal output by any row of photo-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 plurality of frame sampling periods into a complete signal frame, wherein the complete signal frame comprises signals output when all the rows or columns of the light sensing units are started.
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 rows or columns of the photo-sensing units in the display panel are read out through m frame sampling periods, a complete signal frame may include the signals of all the rows or columns of the photo-sensing units read out in m frame sampling periods which 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 complete signal frame, and then whether the coordinates are located within a coordinate range of an icon or a control on the current display interface is determined, if so, the icon or the control is defined as an active area, if not, a cursor or a light spot with a proper size or other marks capable of identifying the area where the coordinates are located is displayed in the coordinate and the corresponding display area around the coordinate, and the display area covered by the marks is defined as an active area, and 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 a single-click active area, a double-click active area, a long-press active area, a sliding operation in each direction with the active area as a starting position, and the like, and then a corresponding operation may be executed according to the operation instruction, for example, double-clicking an icon opens the corresponding application, sliding from right to left turns the page, sliding from bottom to top enlarges the area covered by the sliding, and so on.
Therefore, under the condition that the refresh rate of the display panel is not reduced, the report rate of the light sensing signal (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, a turn-on thin film transistor M2, and a read signal line electrically connected to the photo sensing signal reading chip. Specifically, the gate and the drain of the light-sensing thin film transistor M1 are connected to the dc voltages SVGG and SVDD, which are in a continuous light-sensing state, and the higher the light intensity is, the larger the leakage current is, the more the charges accumulated in the corresponding storage capacitor Cst is, thereby realizing the conversion of the optical signal to the electrical signal. The switching thin film transistor M2 is turned on periodically, that is, the charges in the storage capacitor Cst are released periodically, and the released charges may enter a corresponding channel in the optical sensing signal reading chip ROIC through the read 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 a display panel, the light sensing unit covered by the laser spot generates a lot of light sensing charges, and the display panel can perform actions such as clicking, drawing and the like at the position of the light sensing unit through subsequent signal transmission, processing, rendering and the like.
Specifically, the display panel 20 may further include an array substrate and/or a color filter substrate, and the light sensing unit 21 may be specifically integrated in the array substrate or the color filter substrate of the display panel 20, and in some embodiments, the light sensing unit 21 may also be hung on a glass substrate of the display panel 20. It is understood that the light sensing unit 21 can be integrated on the display panel 20 in different integration manners according to the requirement.
Specifically, taking the photo sensing units 21 as being integrated in the array substrate of the display panel 20 as an example, as shown in fig. 3, each photo sensing unit row 21A may be integrated in its corresponding pixel unit row 24A, for example, one photo sensing unit 21 may be disposed every 3 rows/2 columns of pixel units. It is understood that the photo sensing units 21 can be disposed in different positions and different placement densities as required. In one embodiment, taking a 65-inch, ultra-high-definition, 4K (3840 × 2160 resolution) display panel as an example, in order to ensure sufficient light sensing accuracy of the display panel, one light sensing unit may be arranged every 5 rows/5 columns of pixel units.
In practical implementation, the pixel units 24 and the photo-sensing units 21 arranged in the same row in the display panel 20 may share a gate, that is, the switching thin film transistor M2 in each photo-sensing unit 21 may share a gate with the switching thin film transistor in one pixel unit 24 arranged in an adjacent and same row, so that the pixel units 24 and the photo-sensing units 21 arranged in the same row are electrically connected to the same scanning line 22, and each photo-sensing unit row 21A may be turned on along with the turning on of the corresponding pixel unit row 24A.
Different from the prior art, in the signal reading method of the display panel in the embodiment, the display panel includes a plurality of rows or columns of the photo sensing units, the signals of the rows or the columns of the multiple light sensing units are read through multiple frame sampling periods, the signals of the rows or the columns of the different light sensing units are read in different frame sampling periods, the signal reading method of the display panel controls the on of a plurality of light sensing unit rows or columns in turn in each frame sampling period, and in the starting process, reading the signals of the rows or the columns of the light sensing units corresponding to the frame sampling period in sequence, then, the corresponding signal frame is generated according to the signals read in the same frame sampling period, thereby prolonging the reading time of each row/column of the light sensing units, the requirement of the photoinduction display panel with high refresh rate on the reading speed of the photoinduction signal is reduced, and the cost of the photoinduction 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 present application. The signal reading apparatus 50 of the display panel includes:
(1) control module 51
And the control module 51 is configured to sequentially control, in each frame sampling period, the rows or columns of the multiple light sensing units to be turned on.
In this embodiment, the display panel includes a plurality of photo-sensing unit rows or columns, signals of the plurality of photo-sensing unit rows or columns are read through a plurality of frame sampling periods, and signals of different photo-sensing unit rows or columns are read in different frame sampling periods.
Specifically, the display panel may further include a plurality of pixel unit rows or columns, each photo-sensing unit row or column may correspond to one pixel unit row or column, and each photo-sensing unit row or column may be turned on along with the turning on of the corresponding pixel unit row or column. Accordingly, the control module 51 may be specifically configured to: in each frame sampling period, the pixel units are sequentially controlled to be opened in rows or columns, so that the light sensing units are sequentially opened in rows or columns.
(2) Reading module 52
The reading module 52 is configured to sequentially read signals of rows or columns of the light sensing units corresponding to the frame sampling period in the starting 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 element row or column. Accordingly, the reading module 52 may be specifically configured to: in the starting process, reading signals of corresponding rows or columns of the light sensing units in each row or column sampling period of the frame sampling period in sequence.
(3) First generation module 53
The first generating module 53 is configured to generate a corresponding signal frame according to the signal read in the same frame sampling period.
In an embodiment, in order to determine a starting reading 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
The first determining module 54 is configured to determine a starting reading row or column corresponding to each frame sampling period from a plurality of photo-sensing unit rows or columns.
(5) Second determination module 55
The second determining module 55 is configured to determine, according to the initial reading row or column and the preset interval value, a remaining reading row or column corresponding to each frame sampling period from the plurality of light sensing unit rows, 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 device 50 may further include:
(6) merging module 56
The merging module 56 is configured to merge signal frames corresponding to multiple frame sampling periods into a complete signal frame, where the complete signal frame includes signals output when all the rows or columns of the photo-sensing units are turned on.
(7) Second generation module 57
And a second generating module 57, 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 specific implementation, the above modules may be implemented as independent entities, or may be combined arbitrarily, and implemented as the same or a plurality of entities, where the specific implementation of the above modules may refer to the foregoing method embodiment, and specific beneficial effects that can be achieved may also refer to the beneficial effects in the foregoing method embodiment, which are not described herein again.
Different from the prior art, the signal reading apparatus 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 through a plurality of frame sampling periods, signals of different light sensing unit rows or columns are read through different frame sampling periods, the signal reading apparatus 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 periods during the turning-on process, a first generating module for generating corresponding signal frames according to the signals read through the same frame sampling period, so as to prolong the reading time of each row/column of light sensing units, so as to reduce the requirement of the light sensing display panel with a high refresh rate on the reading speed of light sensing signals, thereby reducing the cost of the light sensing signal reading chip.
It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions or by associated hardware controlled by the instructions, 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 invention provides a storage medium, in which a plurality of instructions are stored, and the instructions can be loaded by a processor to perform the steps of any embodiment of the signal reading method for a display panel provided in the embodiment of the present invention.
Wherein the storage medium may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
Since the instructions stored in the storage medium can execute the steps in any embodiment of the signal reading method for a display panel provided in the embodiment of the present application, the beneficial effects that can be achieved by the signal reading method for any display panel provided in the embodiment of the present application can be achieved, for details, see the foregoing embodiment, and are not described herein again.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A method for reading signals of a display panel, the display panel including a plurality of rows or columns of photo-sensing units, signals of the rows or columns of photo-sensing units being read through a plurality of frame sampling periods, signals of different rows or columns of photo-sensing units being read in different frame sampling periods, the method comprising:
in each frame sampling period, sequentially controlling the plurality of light sensing units to be turned on in rows or columns;
in the starting process, reading signals of the light sensing unit rows or columns corresponding to the frame sampling period in sequence;
and generating a corresponding signal frame according to the signals read in the same frame sampling period.
2. The method according to claim 1, further comprising, before the sequentially reading the signals of the rows or columns of the sensing cells corresponding to the frame sampling period:
determining a starting reading row or column corresponding to each frame sampling period from the plurality of photo-sensing unit rows or columns;
and determining the residual reading row or column corresponding to each frame sampling period from the plurality of light sensing unit rows according to the initial reading row or column and a preset interval value so as to obtain the sensing unit row or column corresponding to each frame sampling period.
3. The method according to claim 1, wherein each of the frame sampling periods comprises a plurality of row or column sampling periods, and each of the row or column sampling periods corresponds to one of the rows or columns of the sensing units, and the sequentially reading the signals of the rows or columns of the sensing units corresponding to the frame sampling periods specifically comprises:
and reading signals of corresponding rows or columns of the light sensing units in each row or column sampling period of the frame sampling period in sequence.
4. The method for reading signals of a display panel according to claim 1, further comprising, after the generating of the corresponding signal frame from the signals read in accordance with the same frame sampling period:
combining the signal frames corresponding to the plurality of 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 started;
generating a corresponding operation instruction according to the complete signal frame;
and executing corresponding operation according to the operation instruction.
5. The method as claimed in claim 1, wherein the display panel further comprises a plurality of pixel unit rows or columns, each of the photo-sensing unit rows or columns corresponds to one of the pixel unit rows or columns, and each of the photo-sensing unit rows or columns is turned on with turning on of the corresponding pixel unit row or column, and the sequentially controlling the turning on of the plurality of photo-sensing unit rows or columns in each of the frame sampling periods specifically comprises:
and in each frame sampling period, sequentially controlling the pixel unit rows or columns to be started so as to enable the light sensing unit rows or columns to be started in sequence.
6. A signal reading apparatus for a display panel, wherein the display panel includes a plurality of rows or columns of photo-sensing units, signals of the rows or columns of photo-sensing units are read through a plurality of frame sampling periods, and signals of different rows or columns of photo-sensing units are read in different frame sampling periods, the signal reading apparatus comprising:
the control module is used for sequentially controlling the plurality of light sensing units to be opened in a row or a column 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;
and the first generating module is used for generating a corresponding signal frame according to the signals read in the same frame sampling period.
7. The signal reading device of the display panel according to claim 6, further comprising:
a first determining module, configured to determine, from the multiple rows or columns of the photo-sensing units, a starting reading row or column corresponding to each frame sampling period;
a second determining module, configured to determine, according to the starting reading row or column and a preset interval value, a remaining reading row or column corresponding to each frame sampling period from the multiple light sensing unit rows, so as to obtain the sensing unit row or column corresponding to each frame sampling period.
8. The apparatus according to claim 6, wherein each of the frame sampling periods comprises a plurality of row or column sampling periods, and each of the row or column sampling periods corresponds to one of the rows or columns of the sensing units, and the apparatus sequentially reads signals from the row or column of the sensing units corresponding to the frame sampling period comprises:
and reading signals of corresponding rows or columns of the light sensing units in each row or column sampling period of the frame sampling period in sequence.
9. The signal reading device of the display panel according to claim 6, further comprising:
a merging module, configured to merge 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 rows or columns of the optical sensing units are turned on;
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.
10. The apparatus as claimed in claim 6, wherein the display panel further comprises a plurality of pixel rows or columns, each of the photo-sensing unit rows or columns corresponds to one of the pixel rows or columns, and each of the photo-sensing unit rows or columns is turned on with the turning on of the corresponding pixel row or column, and the control module is specifically configured to:
and in each frame sampling period, sequentially controlling the pixel unit rows or columns to be started so as to enable the light sensing unit rows or columns to be started in sequence.
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