CN111681586B - Folding screen, control method thereof and electronic equipment - Google Patents
Folding screen, control method thereof and electronic equipment Download PDFInfo
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- CN111681586B CN111681586B CN202010531066.9A CN202010531066A CN111681586B CN 111681586 B CN111681586 B CN 111681586B CN 202010531066 A CN202010531066 A CN 202010531066A CN 111681586 B CN111681586 B CN 111681586B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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Abstract
The application discloses a folding screen, a control method of the folding screen and electronic equipment. The folding screen includes a first display area and a second display area with a folding area therebetween. The first display region includes a first pixel column including a pixel circuit. The folding screen comprises a processor, wherein the processor calculates a first difference value between a preset voltage and a driving voltage of each pixel point in a first pixel row, subtracts the first difference value from a first initial data voltage of a data signal line of a second display area to obtain a first adjustment data voltage, and controls a driving transistor of the second display area to drive a light-emitting element to emit light according to the first adjustment data voltage. According to the folding screen and the control method and the electronic equipment of the folding screen, the voltage drop of the driving voltage end is determined by calculating the first difference value of the preset voltage and the driving voltage, and the data voltage is adjusted according to the voltage drop so that the luminance of the light-emitting element is uniform, and therefore the problem that the display luminance of different areas of the folding screen is different is solved.
Description
Technical Field
The application relates to the technical field of display, in particular to a folding screen, a control method thereof and electronic equipment.
Background
In the related art, the display screen provides a driving voltage through the power supply to control the light emitting element to emit light, and due to the reason of the wiring impedance, the driving voltage drops at different positions, so that the driving voltages corresponding to different pixels are different, and further, the display brightness of different areas of the display screen is different.
Disclosure of Invention
The embodiment of the application provides a folding screen, a control method of the folding screen and electronic equipment.
The folding screen of the embodiment of the present application includes a first display region and a second display region. A folding region exists between the first display region and the second display region, the first display region and the second display region can be folded along the folding region, the first display region includes a first pixel column, the first pixel column includes a pixel circuit, and the pixel circuit includes a driving voltage terminal, a ground terminal, a driving transistor, a light emitting element, a storage capacitor, a data signal line, and a switching transistor. The driving voltage end is connected with the source electrode of the driving transistor, the light-emitting element is used for connecting the drain electrode of the driving transistor and the grounding end, the data signal line is connected with the storage capacitor, the storage capacitor is connected with the grid electrode of the driving transistor, the source electrode of the switching transistor is connected with the driving voltage end, and the drain electrode of the switching transistor is connected with the data signal line; when the switching transistor is in an off state, the data signal line is used for inputting a data voltage, the storage capacitor is used for storing the data voltage, and the driving transistor is used for driving the light-emitting element to emit light according to the data voltage; when the switch transistor is in a conducting state, the switch transistor is used for communicating the driving voltage end with the data signal line so as to enable the data signal line to output the driving voltage of the driving voltage end; when the folding screen is in a folded state, the first display area does not display a picture, and the second display area displays a picture, the switch transistor in the first pixel column is in a conducting state, and the data signal line in the first pixel column is used for outputting the driving voltage corresponding to each pixel point in the first pixel column; the folding screen further comprises a processor, wherein the processor is used for calculating a first difference value between a preset voltage and the driving voltage of each pixel point in the first pixel column, subtracting the first difference value from a first initial data voltage of the data signal line of the second display area to obtain a first adjustment data voltage, and controlling the driving transistor of the second display area to drive the light-emitting element to emit light according to the first adjustment data voltage.
The control method of the embodiment of the application is used for controlling the folding screen, and the folding screen comprises a first display area and a second display area. A folding region exists between the first display region and the second display region, the first display region includes a first pixel column, the first pixel column includes a pixel circuit, the pixel circuit includes a driving voltage terminal, a ground terminal, a driving transistor, a light emitting element, a storage capacitor, a data signal line and a switching transistor, the driving voltage terminal is connected with a source electrode of the driving transistor, the light emitting element is used for connecting a drain electrode of the driving transistor and the ground terminal, the data signal line is connected with the storage capacitor, the storage capacitor is connected with a gate electrode of the driving transistor, a source electrode of the switching transistor is connected with the driving voltage terminal, and a drain electrode of the switching transistor is connected with the data signal line; when the switching transistor is in an off state, the data signal line is used for inputting a data voltage, the storage capacitor is used for storing the data voltage, and the driving transistor is used for driving the light-emitting element to emit light according to the data voltage; when the switch transistor is in a conducting state, the switch transistor is used for communicating the driving voltage end with the data signal line so that the data signal line outputs the driving voltage of the driving voltage end. The control method comprises the following steps: when the folding screen is in a folding state, the first display area does not display a picture, and the second display area displays a picture, controlling the switching transistor in the first pixel column to be turned on so that the data signal line in the first pixel column outputs the driving voltage corresponding to each pixel point in the first pixel column; calculating a first difference value between a preset voltage and the driving voltage of each pixel point in the first pixel row; subtracting the first difference value from a first initial data voltage of the data signal line of the second display area to obtain a first adjusted data voltage; and controlling the driving transistor of the second display area to drive the light-emitting element to emit light according to the first adjusting data voltage.
The electronic equipment of this application embodiment includes casing and above-mentioned folding screen, folding screen sets up on the casing.
According to the folding screen and the control method and the electronic equipment of the folding screen, the voltage drop of the driving voltage end can be determined by calculating the first difference value between the preset voltage and the driving voltage, and the data voltage is adjusted according to the voltage drop to enable the luminance of the light-emitting element to be uniform, so that the problem that the display luminance of different areas of the folding screen is different is solved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a pixel circuit according to some embodiments of the present disclosure;
FIG. 2 is a schematic structural diagram of an electronic device according to some embodiments of the present application;
FIG. 3 is a schematic view of a folding screen according to some embodiments of the present application;
fig. 4 to 8 are schematic flowcharts of a control method of a folding screen according to some embodiments of the present disclosure.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.
Referring to fig. 1 and 2 together, a folding screen 100 according to an embodiment of the present disclosure includes a first display region 50 and a second display region 60, a folding region 20 exists between the first display region 50 and the second display region 60, the first display region 50 and the second display region 60 can be folded along the folding region 20, the first display region 50 includes a first pixel column 52, and the first pixel column 52 includes a pixel circuit 10. The pixel circuit 10 includes a driving voltage terminal 101, a ground terminal 102, a driving transistor 11, a light emitting device 12, a storage capacitor 13, a data signal line 103, and a switching transistor 14, wherein the driving voltage terminal 101 is connected to a source 114 of the driving transistor 11, a drain 116 of the driving transistor 11 is connected to the light emitting device 12, the light emitting device 12 is used for connecting the drain 116 of the driving transistor 11 to the ground terminal 102, the data signal line 103 is connected to the storage capacitor 13, the storage capacitor 13 is connected to a gate 112 of the driving transistor 11, a source 144 of the switching transistor 14 is connected to the driving voltage terminal 101, and a drain 146 of the switching transistor 14 is connected to the data signal line 103; when the switching transistor 14 is in an off state, the data signal line 103 is used for inputting a data voltage Vdata, the storage capacitor 13 is used for storing the data voltage Vdata, and the driving transistor 11 is used for driving the light emitting element 12 to emit light according to the data voltage Vdata; when the switching transistor 14 is in a conducting state, the switching transistor 14 is used for connecting the driving voltage terminal 101 and the data signal line 103, and the data signal line 103 is used for outputting the driving voltage of the driving voltage terminal 101. The driving voltage of the driving voltage terminal 101 may be represented by ELVDD.
The pixel circuit 10 according to the embodiment of the present application can realize switching of the function of the data signal line 103 by controlling the on/off of the switching transistor 14, so that the data signal line 103 can be used for inputting the data voltage Vdata to control the light emitting element 12 to emit light normally, and can also be used for outputting the driving voltage of the driving voltage terminal 101 corresponding to the current pixel circuit 10.
The pixel circuit 10 according to the embodiment of the present invention includes a mode switching control line 104, the mode switching control line 104 is connected to the gate 142 of the switching transistor 14, and when a high level is input to the mode switching control line 104, the switching transistor 14 is in an off state; when the mode switching control line 104 inputs a low level, the switching transistor 14 is in a conductive state. The switching transistor 14 may be a thin film transistor that is turned off when a high level is input and turned on when a low level is input. The mode switching control line 104 can more quickly and efficiently implement the switching of the function of the switching transistor 14.
The pixel circuit 10 of the embodiment of the present application includes a first transistor 15 and a second transistor 16. The pixel circuit 10 further includes a scanning signal line 105 for inputting a scanning signal Gate and a light-emitting signal line 106 for inputting a light-emitting signal EM. The first gate 152 of the first transistor 15 is connected to the scanning signal line 105, the first source 154 of the first transistor 15 is connected to the data signal line 103, the first drain 156 of the first transistor 15 is connected to the storage capacitor 13, the second gate 162 of the second transistor 16 is connected to the light emitting signal line 106, the second source 164 of the second transistor 16 is connected to the driving voltage terminal 101, and the second drain 166 of the second transistor 16 is connected to the drain 116 of the driving transistor 11. The first transistor 15 is used for transmitting the data voltage Vdata into the storage capacitor 13 under the action of the scan signal Gate; the second transistor 16 is used for connecting the driving voltage terminal 101 and the source 114 of the driving transistor 11 under the action of the light emitting signal EM so that the driving transistor 11 drives the light emitting element 12 to emit light according to the data voltage Vdata. The first Transistor 15 and the second Transistor 16 may be Thin Film Transistors (TFTs). In some embodiments, the pixel circuit 10 includes a reset signal line 107, and the reset signal line 107 is used to input a reset signal VINT. When the switching transistor 14 is in an off state, the reset signal line 107 transmits a reset signal VINT to initialize the voltage stored in the storage capacitor 13, then the scan signal line 105 inputs a scan signal Gate and turns on the first transistor 15, the data signal line 103 is used for inputting a data voltage Vdata, the storage capacitor 13 is used for storing the data voltage Vdata, then the light-emitting signal line 106 inputs a light-emitting signal EM and turns on the second transistor 16, and the driving transistor 11 is used for driving the light-emitting element 12 to emit light according to the data voltage Vdata and the voltage of the data voltage terminal; when the switching transistor 14 is in a conducting state, the switching transistor 14 is used for connecting the driving voltage terminal 101 and the data signal line 103, and the data signal line 103 is used for outputting the driving voltage of the driving voltage terminal 101.
Referring to fig. 2, fig. 3 and fig. 4 together, the present application discloses a control method for controlling a foldable screen 100, where the foldable screen 100 includes a first display area 50 and a second display area 60, a foldable area 20 exists between the first display area 50 and the second display area 60, the first display area 50 includes a first pixel column 52, and the first pixel column 52 includes the pixel circuit 10 of any one of the above embodiments. The control method comprises the following steps:
012: when the folding screen 100 is in a folding state, the first display region 50 does not display a picture, and the second display region 60 displays a picture, the switching transistor 14 in the first pixel column 52 is controlled to be turned on, so that the data signal line 103 in the first pixel column 52 outputs a driving voltage corresponding to each pixel point in the first pixel column 52;
014: calculating a first difference between the preset voltage and the driving voltage of each pixel point in the first pixel column 52;
016: subtracting the first difference value from the first initial data voltage of the data signal line 103 of the second display region 60 to obtain a first adjusted data voltage;
018: the driving transistor 11 controlling the second display region 60 drives the light emitting element 12 to emit light according to the first adjustment data voltage.
Referring to fig. 2 and 3 again, the folding screen 100 of the embodiment of the present application includes a first display area 50 and a second display area 60, a folding area 20 exists between the first display area 50 and the second display area 60, the first display area 50 includes a first pixel column 52, and the first pixel column 52 includes the pixel circuit 10 of any one of the above items; when the folding screen 100 is in the folded state, the first display region 50 does not display a picture, and the second display region 60 displays a picture, the switching transistor 14 in the first pixel column 52 is in the conducting state, and the data signal line 103 in the first pixel column 52 is used for outputting the driving voltage corresponding to each pixel point in the first pixel column 52. Folding screen 100 also includes a processor 80, and steps 012, 014, 016 and 018 can all be implemented by processor 80, that is, processor 80 can be configured to: calculating a first difference between the preset voltage and the driving voltage of each pixel point in the first pixel column 52, subtracting the first difference from the first initial data voltage of the data signal line 103 of the second display region 60 to obtain a first adjusted data voltage, and controlling the driving transistor 11 of the second display region 60 to drive the light emitting element 12 to emit light according to the first adjusted data voltage.
The folded panel and the control method thereof according to the embodiment of the present application can realize the switching of the function of the data signal line 103 by controlling the on/off of the switching transistor 14, so that the data signal line 103 can be used for inputting a data voltage to control the light emitting element 12 to emit light normally, and can also be used for outputting a driving voltage of the driving voltage terminal 101 corresponding to the current pixel circuit 10. In addition, the voltage drop of the driving voltage end 101 can be determined by calculating the first difference between the preset voltage and the driving voltage, and the data voltage is adjusted according to the voltage drop to make the luminance of the light-emitting element 12 uniform, so that the problem that the display luminance of different areas of the folding screen is different is solved.
Specifically, the voltage drop of the folding screen 100 occurs due to the trace impedance, the driving voltage of the driving voltage terminal 101 at different positions of the folding screen 100 has a difference value with the preset voltage, and the current of the light emitting element 12 is related to the driving voltage intensity of the driving voltage terminal 101, so that the brightness difference occurs between different rows of the folding screen 100The calculation formula of the current is as follows: i ═ K (ELVDD-Vdata- | Vth |) 2 . Where ELVDD is a driving voltage (e.g., 3.6V to 4.2V) of the driving voltage terminal 101, Vdata is a data voltage inputted to the data signal line 103, and Vth is a threshold voltage of the driving transistor 11. For example, the driving voltage of the first row of pixel columns of the folded screen 100 is 3.7V, the driving voltage of the second row of pixel columns is 3.6V, wherein the preset voltage is 3.8V, the first difference between the driving voltage of the first row of pixel columns and the preset voltage is 0.1V, and the first difference between the driving voltage of the second row of pixel columns and the preset voltage is 0.2V.
In some embodiments, the pixel circuits of the other pixels of the first display area 50 except for the first pixel column 52 may be conventional pixel circuits (not including the switching transistor 14), that is, the first display area 50 of the embodiment of the present application only needs to modify the pixel circuits of the first pixel column 52, so that unnecessary modifications can be reduced, the structure of the pixel circuits of the first display area 50 can be simplified, and the manufacturing cost of the folding screen 100 can be reduced.
In some embodiments, the folding screen 100 may be an RGB color display screen. Wherein, RGB is red (R), green (G), blue (B) additive color, which is the basic color of the folding screen 100. The folding screen 100 includes an R pixel column, a G pixel column, and a B pixel column, the R pixel column may display red light with an intensity value of 0 to 255, the R pixel column displays the darkest red tone when the intensity value is 0 and displays the brightest red tone when the intensity value is 255; the G pixel column may display green light with an intensity value of 0 to 255, the G pixel column displaying the darkest green shade at an intensity value of 0 and the brightest green shade at an intensity value of 255; the B pixel column may display blue light with an intensity value of 0 to 255, with the B pixel column displaying the darkest blue tone at an intensity value of 0 and the brightest blue tone at an intensity value of 255. The R pixel column, the G pixel column, and the B pixel column in the folded screen 100 may be sequentially arranged, and when different colors are required to be displayed, the R pixel column, the G pixel column, and the B pixel column emit light with different intensity values, respectively. For example: when the color displayed in the first display region 50 in the folded screen 100 is red tone, the R pixel column may be 255, the G pixel column may be 0, and the B pixel column may be 0.
Referring to fig. 2 and 5 together, in some embodiments, the second display area 60 of the folding screen 100 includes a second pixel column 62, and the second pixel column 62 includes the pixel circuit 10 of any one of the above embodiments, and the control method includes:
022: when the folding screen 100 is in a folding state, the first display region 50 displays a picture, and the second display region 60 does not display a picture, the switching transistor 14 in the first pixel column 52 is controlled to be in an off state, and the switching transistor 14 in the second pixel column 62 is controlled to be turned on, so that the data signal line 103 in the second pixel column 62 is used for outputting a driving voltage corresponding to each pixel point in the second pixel column 62;
024: calculating a second difference between the preset voltage and the driving voltage of each pixel point in the second pixel column 62;
026: subtracting a second difference value from a second initial data voltage of the data signal line 103 of the first display region 50 to obtain a second adjusted data voltage;
028: the driving transistor 11 controlling the second display region 60 drives the light emitting element 12 to emit light according to the second adjustment data voltage.
In some embodiments, the second display region 60 of the folding screen 100 includes a second pixel column 62, the second pixel column 62 includes the pixel circuit 10 of any of the above embodiments, and step 022, step 024, step 026, and step 028 may be implemented by the processor 80, that is, the processor 80 may be configured to: when the folding screen 100 is in a folding state, the first display region 50 displays a picture, and the second display region 60 does not display a picture, the switching transistor 14 in the first pixel column 52 is in an off state, the switching transistor 14 in the second pixel column 62 is in an on state, and the data signal line 103 in the second pixel column 62 is used for outputting a driving voltage corresponding to each pixel point in the second pixel column 62; calculating a second difference between the preset voltage and the driving voltage of each pixel point in the second pixel column 62, subtracting the second difference from the second initial data voltage of the data signal line 103 of the first display region 50 to obtain a second adjusted data voltage, and controlling the driving transistor 11 of the second display region 60 to drive the light emitting element 12 to emit light according to the second adjusted data voltage.
The two display areas of the folding screen 100 are respectively provided with the first pixel column 52 and the second pixel column 62, and the user can select the operation mode of the folding screen 100, for example: the first display area 50 displays no screen and the second display area 60 displays a screen; alternatively, the first display region 50 displays a screen and the second display region 60 does not display a screen. When the first display area 50 does not display a picture and the second display area 60 displays a picture, the switching transistor 14 in the second pixel column 62 is in an off state, the switching transistor 14 in the first pixel column 52 is in an on state, the data signal line 103 in the first pixel column 52 is used for outputting a driving voltage corresponding to each pixel point in the first pixel column 52, and the processor 80 may calculate a first difference between a preset voltage and the driving voltage of each pixel point in the first pixel column 52, subtract the first difference from a first initial data voltage of the data signal line 103 in the second display area 60 to obtain a first adjustment data voltage, and control the driving transistor 11 in the second display area 60 to drive the light emitting element 12 to emit light according to the first adjustment data voltage; when the first display area 50 displays a picture and the second display area 60 does not display the picture, the switching transistor 14 in the first pixel column 52 is in an off state, the switching transistor 14 in the second pixel column 62 is in an on state, and the data signal line 103 in the second pixel column 62 is used for outputting a driving voltage corresponding to each pixel point in the second pixel column 62; the processor 80 may calculate a second difference between the preset voltage and the driving voltage of each pixel point in the second pixel column 62, subtract the second difference from the second initial data voltage of the data signal line 103 of the first display region 50 to obtain a second adjusted data voltage, and control the driving transistor 11 of the first display region 50 to drive the light emitting element 12 to emit light according to the second adjusted data voltage. Therefore, the first pixel column 52 and the second pixel column 62 are respectively disposed in the two display areas of the foldable screen 100, so that different operation modes of the foldable screen 100 can be selected, and whether a user uses the first display area 50 to display a picture or uses the second display area 60 to display a picture, the data voltage can be quickly and accurately adjusted to make the light-emitting brightness of the light-emitting elements 12 uniform.
In some embodiments, the foldable screen 100 can be divided into a laterally inner folding and a laterally outer folding according to the folding manner, the foldable screen 100 can be folded along the folding area 20 by a hinge of a rotation shaft, two display areas of the foldable screen 100 can be folded together by bending 180 degrees by the hinge of the rotation shaft, and the first pixel column 52 and the second pixel column 62 are located at both sides of the folding area 20. For example: in an embodiment of the present application, the folding screen 100 may be laterally outside folded. When the foldable screen 100 is in the folded state, the foldable screen 100 can have two operation modes: the working mode of the foldable screen 100 may be that the first display region 50 is a front side and displays a picture, the second display region 60 is opposite to the first display region 50, and the second display region 60 is a back side and does not display a picture; another operation mode of the foldable screen 100 may be that the second display area 60 is a front side and displays a picture, the first display area 50 is opposite to the second display area 60, and the first display area 50 is a back side and does not display a picture.
In some embodiments, the first pixel column 52 and the second pixel column 62 may both be parallel to the folding region 20, and the first pixel column 52 and the second pixel column 62 are respectively located at both sides of the folding region 20. The first pixel column 52 is closer to the folding area 20 than the other pixel columns of the first display area 50, and the second pixel column 62 is closer to the folding area 20 than the other pixel columns of the second display area 60. In some embodiments, the driving voltage of the driving voltage terminal 101 may be a voltage supplied through a peripheral circuit of a flexible circuit board at the bottom of the folding screen 100 and connected to each pixel circuit. The first pixel column 52 and the second pixel column 62 being closer to the folding area 20 relative to the other pixel columns may facilitate output circuitry, and the readout circuitry may transmit the output drive voltages to the processor 80, from which the processor 80 may make calculations.
The driving voltage of the driving voltage terminal 101 can be the voltage supplied from the peripheral circuit of the flexible circuit board at the bottom of the folding screen 100, the driving voltage of the driving voltage terminal 101 is input into the pixel column after being longitudinally wired, the pixel column is subjected to voltage drop due to the wiring impedance, the driving voltages of the pixel points on different rows on the pixel column are different, the voltage drops of different pixel points on the same row are the same, and the driving voltages of the pixel points on the same row are the same. Therefore, the first difference of the driving voltages of the pixels in the first pixel row 52 is substantially the same as the second difference of the driving voltages of the corresponding pixels in the same row in the second pixel row 62.
Referring to fig. 3 and 6 together, in some embodiments, the folding screen 100 further includes a storage element 70, and the storage element 70 is configured to store the first difference value. Referring to fig. 6 again, when the foldable screen 100 is in the unfolded state, the control method includes:
032: subtracting the first difference value from the initial data voltage of the data signal line 103 of the first display area 50 and the second display area 60 to obtain an adjusted data voltage;
034: the driving transistor 11 controlling the first display region 50 and the second display region 60 drives the light emitting element 12 to emit light according to the adjustment data voltage.
In some embodiments, the folding screen 100 includes a storage element 70, the storage element is used for storing the first difference value, and each of the steps 032 and 034 can be implemented by the processor 80, that is, the processor 80 can be used for: and when the folding screen 100 is in the unfolding state, subtracting the first difference value from the initial data voltage of the data signal line 103 of the first display area 50 and the second display area 60 to obtain an adjusted data voltage, and controlling the driving transistor 11 of the first display area 50 and the second display area 60 to drive the light-emitting element 12 to emit light according to the adjusted data voltage.
The storage element 70 is used for storing the first difference value and may be a read-only memory, a magnetic disk or an optical disk. The storage element 70 stores the first difference value to more quickly obtain the adjusted data voltage to compensate for the brightness of the folding screen 100.
In some embodiments, referring to fig. 7, the control method includes:
042: determining the overall brightness of a to-be-displayed picture of the folding screen 100;
044: determining a corresponding first difference value according to the overall brightness;
046: subtracting the first difference value from the initial data voltage of the data signal line 103 of the first display area 50 and the second display area 60 to obtain an adjusted data voltage;
048: the driving transistor 11 controlling the first display region 50 and the second display region 60 drives the light emitting element 12 to emit light according to the adjustment data voltage.
In some embodiments, steps 042, 044, 046 and 048 may all be implemented by the processor 80, that is, the processor 80 may be configured to: determining the overall brightness of a picture to be displayed of the folding screen 100, determining a corresponding first difference value according to the overall brightness, subtracting the first difference value from the initial data voltage of the data signal line 103 of the first display area 50 and the second display area 60 to obtain an adjusted data voltage, and controlling the driving transistor 11 of the first display area 50 and the second display area 60 to drive the light-emitting element 12 to emit light according to the adjusted data voltage.
In some embodiments, the larger the current, the larger the voltage drop, the stronger the brightness of the folded screen 100, and the stronger the overall brightness of the folded screen 100, the larger the first difference in the driving voltage. In some embodiments, the overall brightness of the to-be-displayed picture of the folding screen 100 may be budgeted, the values of the corresponding first difference values are different according to the different intensities of the overall brightness of the to-be-displayed picture, the first difference value of the pixel circuit in each row is selected according to the overall brightness of the to-be-displayed picture, the overall brightness of the to-be-displayed picture may be budgeted quickly and accurately, and the adjustment data voltage is obtained to implement the automatic compensation of the brightness of the folding screen 100.
In some embodiments, referring to fig. 8, the control method includes:
052: calculating a first difference value when the current frame picture is displayed in the second display area 60;
054: subtracting the first difference value from the first initial data voltage to obtain a first adjusted data voltage when the second display region 60 displays the next frame;
056: the driving transistor 11 controlling the second display region 60 drives the light emitting element 12 to emit light according to the first adjustment data voltage.
In certain embodiments, step 052, step 054, and step 056 may all be implemented by processor 80, that is, processor 80 may be configured to: calculating a first difference value when the second display region 60 displays the current frame, subtracting the first difference value from the first initial data voltage to obtain a first adjusted data voltage when the second display region 60 displays the next frame, and controlling the driving transistor 11 of the second display region 60 to drive the light emitting element 12 to emit light according to the first adjusted data voltage.
In some embodiments, the first difference value is calculated according to the current frame, the first adjustment data voltage is obtained according to the first difference value, and the next frame is subjected to the brightness compensation according to the first adjustment data voltage.
It is worth mentioning that the processor 80 may be referred to as a driver board. The driver board may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc.
Referring to fig. 2 again, the present application discloses an electronic device 1000, where the electronic device 1000 includes a housing 200 and the foldable screen 100 of any one of the above embodiments, and the foldable screen 100 is disposed on the housing. The electronic device 1000 may include a mobile phone, a computer, etc.
In the description of embodiments of the present application, reference to the description of the terms "one embodiment," "certain embodiments," "illustrative embodiments," "example," "specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A folding screen is characterized in that the folding screen comprises a first display area and a second display area, a folding area is arranged between the first display area and the second display area, the first display area and the second display area can be folded along the folding area, the first display area comprises a first pixel column, the first pixel column comprises a pixel circuit, the pixel circuit comprises a driving voltage end, a grounding end, a driving transistor, a light-emitting element, a storage capacitor, a data signal line and a switching transistor, the driving voltage end is connected with a source electrode of the driving transistor, the light-emitting element is used for connecting a drain electrode of the driving transistor with the grounding end, the data signal line is connected with the storage capacitor, the storage capacitor is connected with a grid electrode of the driving transistor, and a source electrode of the switching transistor is connected with the driving voltage end, the drain electrode of the switching transistor is connected with the data signal line; when the switching transistor is in an off state, the data signal line is used for inputting a data voltage, the storage capacitor is used for storing the data voltage, and the driving transistor is used for driving the light-emitting element to emit light according to the data voltage; when the switch transistor is in a conducting state, the switch transistor is used for communicating the driving voltage end with the data signal line so as to enable the data signal line to output the driving voltage of the driving voltage end;
when the foldable screen is in a folded state, the first display region does not display a picture, and the second display region displays a picture, the switch transistor in the first pixel column is in a conducting state, and the data signal line in the first pixel column is used for outputting the driving voltage corresponding to each pixel point in the first pixel column;
the folding screen further comprises a processor, wherein the processor is used for calculating a first difference value between a preset voltage and the driving voltage of each pixel point in the first pixel column, subtracting the first difference value from a first initial data voltage of the data signal line of the second display area to obtain a first adjustment data voltage, and controlling a driving transistor of the second display area to drive a light-emitting element to emit light according to the first adjustment data voltage.
2. A folding screen according to claim 1 wherein the pixel circuit includes a mode switching control line connected to the gate of the switching transistor, the switching transistor being in an off state when the mode switching control line inputs a high level; when the mode switching control line inputs a low level, the switching transistor is in a conducting state.
3. A folding screen according to claim 1, wherein the pixel circuit further comprises a first transistor and a second transistor, a first gate of the first transistor is connected to a scanning signal line, a first source of the first transistor is connected to the data signal line, a first drain of the first transistor is connected to the storage capacitor, a second gate of the second transistor is connected to a light emitting signal line, a second source of the second transistor is connected to the driving voltage terminal, a second drain of the second transistor is connected to a drain of the driving transistor, the first transistor is configured to transmit the data voltage into the storage capacitor by a scanning signal of the scanning signal line; the second transistor is used for communicating the driving voltage end and the source electrode of the driving transistor under the action of a light-emitting signal of the light-emitting signal line so as to enable the driving transistor to drive the light-emitting element to emit light according to the data voltage.
4. A folded screen of claim 1, wherein the second display region comprises a second column of pixels comprising the pixel circuit;
when the folding screen is in a folded state and the first display region displays a picture and the second display region does not display a picture, the switch transistor in the first pixel column is in an off state, the switch transistor in the second pixel column is in an on state, and the data signal line in the second pixel column is used for outputting the driving voltage corresponding to each pixel point in the second pixel column;
the processor is configured to calculate a second difference between a preset voltage and the driving voltage of each pixel point in the second pixel row, subtract the second difference from a second initial data voltage of the data signal line in the first display area to obtain a second adjusted data voltage, and control the driving transistor in the second display area to drive the light emitting element to emit light according to the second adjusted data voltage.
5. A folded screen of claim 4 wherein the first column of pixels and the second column of pixels are both parallel to the fold region, the first column of pixels being closer to the fold region relative to other pixels of the first display region, the second column of pixels being closer to the fold region relative to other pixels of the second display region.
6. A foldable screen as recited in claim 1, further comprising a memory element for storing the first difference, wherein the processor is further configured to subtract the first difference from initial data voltages of the data signal lines of the first and second display regions when the foldable screen is in the unfolded state to obtain an adjusted data voltage, and to control the driving transistors of the first and second display regions to drive the light emitting elements to emit light according to the adjusted data voltage.
7. The foldable screen of claim 6, wherein the processor is configured to determine an overall brightness of a frame to be displayed on the foldable screen, determine the corresponding first difference according to the overall brightness, subtract the first difference from an initial data voltage of the data signal lines of the first display area and the second display area to obtain an adjusted data voltage, and control the driving transistors of the first display area and the second display area to drive the light emitting elements to emit light according to the adjusted data voltage.
8. A foldable screen as recited in claim 1, wherein the processor is configured to calculate the first difference when the second display region displays a current frame, subtract the first difference from the first initial data voltage when the second display region displays a next frame to obtain the first adjusted data voltage, and control the driving transistor of the second display region to drive the light emitting element to emit light according to the first adjusted data voltage.
9. A control method of a folding screen is characterized in that the folding screen comprises a first display area and a second display area, a folding region exists between the first display region and the second display region, the first display region including a first pixel column, the first pixel column includes a pixel circuit including a driving voltage terminal, a ground terminal, a driving transistor, a light emitting element, a storage capacitor, a data signal line, and a switching transistor, the driving voltage end is connected with the source electrode of the driving transistor, the light-emitting element is used for connecting the drain electrode of the driving transistor and the grounding end, the data signal line is connected to the storage capacitor, the storage capacitor is connected to the gate of the driving transistor, the source electrode of the switch transistor is connected with the driving voltage end, and the drain electrode of the switch transistor is connected with the data signal line; when the switching transistor is in an off state, the data signal line is used for inputting a data voltage, the storage capacitor is used for storing the data voltage, and the driving transistor is used for driving the light-emitting element to emit light according to the data voltage; when the switch transistor is in a conducting state, the switch transistor is used for communicating the driving voltage end with the data signal line so as to enable the data signal line to output the driving voltage of the driving voltage end; the control method comprises the following steps:
when the folding screen is in a folding state, the first display area does not display a picture, and the second display area displays a picture, controlling the switching transistor in the first pixel column to be turned on so that the data signal line in the first pixel column outputs the driving voltage corresponding to each pixel point in the first pixel column;
calculating a first difference value between a preset voltage and the driving voltage of each pixel point in the first pixel row;
subtracting the first difference value from a first initial data voltage of the data signal line of the second display area to obtain a first adjusted data voltage;
and controlling a driving transistor of the second display area to drive a light-emitting element to emit light according to the first adjustment data voltage.
10. An electronic device, characterized in that the electronic device comprises a housing and a folding screen according to any one of claims 1-8, the folding screen being arranged on the housing.
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| WO2023159544A1 (en) * | 2022-02-28 | 2023-08-31 | 京东方科技集团股份有限公司 | Data driving method, source electrode driver, and display device |
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