CN112201190B - Control method, processor, direct-current voltage element, display screen and electronic equipment - Google Patents
Control method, processor, direct-current voltage element, display screen and electronic equipment Download PDFInfo
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- CN112201190B CN112201190B CN202011072041.3A CN202011072041A CN112201190B CN 112201190 B CN112201190 B CN 112201190B CN 202011072041 A CN202011072041 A CN 202011072041A CN 112201190 B CN112201190 B CN 112201190B
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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
- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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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
Abstract
The application discloses a display control method, a processor, a direct-current voltage element, a display screen and electronic equipment. The display control method comprises the following steps: determining display current according to a picture to be displayed; determining a voltage drop value based on the display current; and determining a voltage value to be set according to the voltage drop value, and sending the voltage value to be set to the direct-current voltage element so that the direct-current voltage element adjusts the voltage value of the driving voltage to the voltage value to be set, and controlling the display screen to display a picture to be displayed according to the voltage value to be set. Therefore, the voltage value to be set is determined according to the voltage drop value, and the voltage value of the driving voltage is adjusted to be the voltage value to be set, so that the voltage value of the driving voltage actually applied to the pixels arranged at different positions is compensated, namely, the voltage value of the driving voltage can be adjusted according to the picture to be displayed, so that the driving voltage output to the display screen is consistent, and the display brightness of the display screen is uniform.
Description
Technical Field
The present application relates to consumer electronics, and more particularly, to a display control method, processor, dc voltage element, display screen, and electronic device.
Background
In the related art, a display panel controls light emission of a light emitting element using a driving voltage, and in an ideal case, the driving voltages corresponding to respective pixels should be uniform. In practical situations, the driving voltages applied to the pixels at different positions may be different due to the wiring resistance, which results in a difference in display brightness in different areas of the display screen.
Disclosure of Invention
The application provides a display control method, a processor, a direct-current voltage element, a display screen and electronic equipment.
The display control method of the embodiment of the application is used for controlling a display screen to display pictures and is characterized in that the display screen comprises a direct-current voltage element for generating a driving voltage; the display control method includes: determining display current according to a picture to be displayed; determining a voltage drop value from the display current; determining a voltage value to be set according to the voltage drop value, and sending the voltage value to be set to the direct-current voltage element so that the direct-current voltage element adjusts the voltage value of the driving voltage to the voltage value to be set; and controlling the display screen to display the picture to be displayed according to the voltage value to be set.
The control method of the embodiment of the application is used for a direct-current voltage element in the display device, and the direct-current voltage element is used for generating a driving voltage; the control method comprises the following steps: receiving a voltage value to be set, wherein the voltage value to be set is determined according to a voltage drop value, the voltage drop value is determined according to a display current, and the display current is determined according to a picture to be displayed; and adjusting the voltage value of the driving voltage to the voltage value to be set.
The processor of an embodiment of the present application is configured to communicate with a dc voltage element configured to generate a driving voltage, the processor being configured to: determining a display current according to a picture to be displayed, determining a voltage drop value according to the display current, determining a voltage value to be set according to the voltage drop value, and sending the voltage value to be set to the direct-current voltage element so that the direct-current voltage element adjusts the voltage value of the driving voltage to the voltage value to be set.
The display screen of the embodiment of the application comprises a direct-current voltage element and a display driving element, wherein the direct-current voltage element is used for generating a driving voltage, and the display driving element is used for: determining a display current according to a picture to be displayed, determining a voltage drop value according to the display current, determining a voltage value to be set according to the voltage drop value, and sending the voltage value to be set to the direct-current voltage element; the direct-current voltage element is used for adjusting the voltage value of the driving voltage to the voltage value to be set.
The direct-current voltage element is used for generating a driving voltage; the direct current voltage element is also used for: receiving a voltage value to be set, wherein the voltage value to be set is determined according to a voltage drop value, the voltage drop value is determined according to a display current, and the display current is determined according to a picture to be displayed; and adjusting the voltage value of the driving voltage to the voltage value to be set.
The electronic device of the embodiment of the application comprises a direct-current voltage element and a processor, wherein the direct-current voltage element is used for generating a driving voltage; the processor is configured to: determining display current according to a picture to be displayed; determining a voltage drop value from the display current; determining a voltage value to be set according to the voltage drop value and sending the voltage value to be set to the direct-current voltage element; the direct-current voltage element is used for adjusting the voltage value of the driving voltage to the voltage value to be set.
According to the display control method, the processor, the direct-current voltage element, the display screen and the electronic equipment, the voltage value to be set can be determined according to the voltage drop value, and the voltage value of the driving voltage is adjusted to be the voltage value to be set, so that the voltage value of the driving voltage actually applied to pixels arranged at different positions is compensated, namely, the voltage value of the driving voltage can be adjusted according to the picture to be displayed, so that the driving voltage output to the display screen is consistent, and further the display brightness of the display picture is uniform.
Additional aspects and advantages of the 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 application.
Drawings
The foregoing 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, in which:
FIG. 1 is a schematic structural view of a display screen according to some embodiments of the present application;
FIG. 2 is a schematic diagram of an electronic device according to some embodiments of the present application;
FIGS. 3-5 are flow diagrams of display control methods according to certain embodiments of the present application;
FIG. 6 is a gray scale distribution histogram of a display screen according to some embodiments of the present application;
FIG. 7 is a flow chart of a display control method according to some embodiments of the present application;
FIG. 8 is a graph illustrating current density versus luminance according to certain embodiments of the present disclosure;
FIG. 9 is a flow chart of a display control method according to some embodiments of the present application;
FIG. 10 is a schematic diagram of a pixel of some embodiments of the present application;
fig. 11 and 12 are flow diagrams of display control methods according to certain embodiments of the present application.
The main feature reference numerals:
an electronic device 100;
the display panel comprises a processor 10, a display screen 20, a direct-current voltage element 21, a display driving element 22, a driving signal line 23, a pixel 24, a first sub-pixel 241, a second sub-pixel 242, a third sub-pixel 243 and a flexible circuit board 25.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.
The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., 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 embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Referring to fig. 1 to 3, the display control method according to the embodiment of the present application is used for controlling a display 20 to display a picture, the display 20 includes a dc voltage element 21 for generating a driving voltage, and the display control method includes:
01, determining display current according to a picture to be displayed;
03, determining a voltage drop value according to the display current;
05, determining a voltage value to be set according to the voltage drop value, and sending the voltage value to be set to the direct-current voltage element 21 so that the direct-current voltage element 21 adjusts the voltage value of the driving voltage to the voltage value to be set.
06, the control display screen 20 displays the picture to be displayed according to the voltage value to be set.
The display control method of the embodiment of the present application may be implemented by the processor 10, where steps 01, 03, 05, and 06 may all be implemented by the processor 10. That is, the processor 10 may be configured to determine a display current according to the to-be-displayed screen, determine a voltage drop value according to the display current, determine a to-be-set voltage value according to the voltage drop value, and send the to-be-set voltage value to the dc voltage element 21 so that the dc voltage element 21 adjusts the voltage value of the driving voltage to the to-be-set voltage value, and control the display screen 20 to display the to-be-displayed screen according to the to-be-set voltage value.
The processor 10 may be an AP (application processor), a DDIC (display driving element), or an off-the-shelf display processing chip (such as a DSP chip).
The display panel 20 of the embodiment of the present application includes a direct-current voltage element 21 for generating a driving voltage and a display driving element 22 for generating the driving voltage, the display driving element 22 being configured to: determining a display current according to a picture to be displayed, determining a voltage drop value according to the display current, determining a voltage value to be set according to the voltage drop value, and transmitting the voltage value to be set to the direct-current voltage element 21; the dc voltage element 21 is used for adjusting the voltage value of the driving voltage to a voltage value to be set.
The control method of the embodiment of the present application may also be implemented by the display 20, where step 01, step 03, and step 05 may be implemented by the display driving element 22, and step 07 and step 09 may be implemented by the dc voltage element 21.
The display driving element 22 may refer to a display driving chip (DDIC). It will be appreciated that a significant voltage drop (i.e. a voltage drop) occurs due to the presence of the resistor during the transmission of the drive voltage through the display drive element 22 and the drive signal line 23 to the respective pixels 24.
The voltage drop may cause the driving voltage actually received by the pixel 24 to be smaller than the driving voltage provided by the dc voltage element 21, and may also cause the actual voltage of the pixel at the bottom end of the display screen 20 to be greater than the actual voltage of the pixel at the top end of the display screen 20, so that the display screen 20 generates brightness and color differences, and the display effect is affected.
By performing the prediction of the display current at the time of the screen display of the display screen 20, the driving voltage is constant by dynamically setting the driving voltage of the screen, and the compensation of the driving voltage can be realized. The voltage value to be set is a compensated voltage value, and the direct-current voltage element 21 can adjust the voltage value of the driving voltage to be the voltage value to be set, so as to realize compensation, thereby refreshing the picture to complete the display of the picture to be displayed.
Referring to fig. 4, the control method of the embodiment of the present application is used for a dc voltage element 21 in a display device, where the dc voltage element 21 is used for generating a driving voltage; the control method comprises the following steps:
07, receiving a voltage value to be set, wherein the voltage value to be set is determined according to a voltage drop value, the voltage drop value is determined according to a display current, and the display current is determined according to a picture to be displayed;
09, the voltage value of the driving voltage is adjusted to the voltage value to be set.
The dc voltage element 21 of the embodiment of the present application is used to generate a driving voltage; both steps 07, 09 can be implemented by the dc voltage element 21, i.e. the dc voltage element 21 is further configured to: receiving a voltage value to be set, wherein the voltage value to be set is determined according to a voltage drop value, the voltage drop value is determined according to a display current, and the display current is determined according to a picture to be displayed; and adjusting the voltage value of the driving voltage to be the voltage value to be set.
The dc voltage element 21 may employ a DCDC chip, and the dc voltage element 21 generates a driving voltage to supply power to the respective pixels 24. The driving signal lines 23 are in a net shape and are disposed inside the display 20, and the plurality of pixels 24 are respectively connected to the driving signal lines 23, so that the pixels 24 can receive the driving voltage generated by the dc voltage element 21.
In this way, the voltage value to be set is determined according to the voltage drop value, and the voltage value of the driving voltage is adjusted to be the voltage value to be set, so that the voltage value of the driving voltage actually applied to the pixels arranged at different positions is compensated, namely, the voltage value of the driving voltage can be adjusted according to the picture to be displayed, so that the driving voltage output to the display screen 20 is consistent, and the display brightness of the display screen is uniform. In addition, since the driving voltage is generated by the dc circuit element, the driving voltage is adjusted by the dc voltage element 21 more directly than by other components such as the display driving element 22, and thus the adjusted driving voltage can be made more accurate.
Referring to fig. 5, in some embodiments, step 01 includes:
011, acquiring a gray level distribution histogram of a picture to be displayed;
012, the display current is determined from the gray-scale distribution histogram and the light-emitting element deposition area of the pixel.
In some embodiments, both steps 011 and 012 may be implemented by the processor 10, i.e., the processor 10 may be configured to obtain a gray level distribution histogram of a frame to be displayed; and determining the display current according to the gray level distribution histogram and the evaporation area of the light-emitting element of the pixel.
In some embodiments, both steps 011 and 012 may be implemented by the display driving element 22, i.e., the display driving element 22 may be used to obtain a gray level distribution histogram of a picture to be displayed; and determining the display current according to the gray level distribution histogram and the evaporation area of the light-emitting element of the pixel.
The gray scale is to divide the brightness change of the picture to be displayed between the brightest and darkest into a plurality of parts, and each gray scale value range is called a gray scale. The gray level partial histogram is a statistical graph with gray values on the horizontal axis and occurrence probabilities on the vertical axis, and shows the occurrence probabilities of the gray values. The display current can be determined by the current density corresponding to the gray scale, the light emitting element vapor deposition area, and the occurrence probability.
For example, in one embodiment, the display driving element 22 processes a picture, which is a display screen with a resolution of 480×240, and obtains a gray level sub-histogram by decomposing and counting each pixel (total number of pixels is 480×240=115200) as shown in fig. 6, where the gray level range is 0-255.
It will be appreciated that the acquisition of the gray level distribution histogram may be implemented in an AP (application processor), in a DDIC (display driver element), or in an off-the-shelf display processing chip (e.g., DSP chip).
Therefore, the occurrence probability corresponding to each gray level of each pixel can be intuitively obtained through the gray level distribution histogram, and the display current is determined.
Referring to fig. 7, in some embodiments, step 012 includes:
0121, determining each gray level and the corresponding occurrence probability according to the gray level distribution histogram;
0122, determining corresponding brightness according to each gray level;
0123, determining a corresponding current density according to the brightness;
0124, determining the display current according to the current density, the evaporation area of the light-emitting element and the occurrence probability corresponding to all gray scales.
In some embodiments, all of steps 0121, 0122, 0123, and 0124 may be implemented by the processor 10, i.e., the processor 10 may be configured to determine each gray level and the corresponding probability of occurrence according to the gray level distribution histogram; determining corresponding brightness according to each gray level; determining a corresponding current density according to the brightness; and determining the display current according to the current density, the evaporation area and the occurrence probability of the light-emitting element corresponding to all gray scales.
In some embodiments, all of the steps 0121, 0122, 0123, and 0124 may be implemented by the display driving element 22, i.e. the display driving element 22 may be configured to determine each gray level and the corresponding occurrence probability according to the gray level distribution histogram; determining corresponding brightness according to each gray level; determining a corresponding current density according to the brightness; and determining the display current according to the current density, the evaporation area and the occurrence probability of the light-emitting element corresponding to all gray scales.
Specifically, each gray level corresponds to a luminance, and each luminance corresponds to a current density. As shown in fig. 8, the current density corresponds to luminance on the horizontal axis and luminance on the vertical axis.
In some embodiments, the correspondence between current density and brightness may be obtained from actual detection of each display screen 20. By obtaining the correspondence between the current density and the brightness in this way, individual differences caused by different parameters of the display screen 20 can be avoided.
Thus, the difference between the display panels 20 can be eliminated, and the accuracy of the voltage compensation can be increased.
Referring to fig. 9, in some embodiments, each pixel 24 includes a first sub-pixel 241, a second sub-pixel 242, and a third sub-pixel 243, and step 0124 includes:
01241, determining a first display current according to the current densities corresponding to all gray scales of the first sub-pixel 241, the evaporation area of the light emitting element of the first sub-pixel 241, and the occurrence probability;
01242, determining a second display current according to the current densities of all gray scales of the second sub-pixel 242, the vapor deposition area of the light emitting element of the second sub-pixel 242, and the occurrence probability;
01243, determining a third display current according to the current densities corresponding to all gray scales of the third sub-pixel 243, the vapor deposition area of the light emitting element of the third sub-pixel 243, and the occurrence probability;
01244, determining the display current based on the first display current, the second display current, and the third display current.
In some embodiments, steps 01241, 01242, 01243, and 01244 may be implemented by the processor 10, that is, the processor 10 may be configured to determine the first display current according to the current densities corresponding to all gray scales of the first subpixel 241, the evaporation area of the light emitting element of the first subpixel 241, and the occurrence probability; determining a second display current according to the current densities corresponding to all gray scales of the second sub-pixel 242, the evaporation area of the light emitting element of the second sub-pixel 242 and the occurrence probability; determining a third display current according to the current densities corresponding to all gray scales of the third sub-pixel 243, the evaporation area of the light emitting element of the third sub-pixel 243, and the occurrence probability; and determining the display current according to the first display current, the second display current and the third display current.
In some embodiments, steps 01241, 01242, 01243, and 01244 may be implemented by the display driving element 22, that is, the display driving element 22 may be configured to determine the first display current according to the current densities corresponding to all gray scales of the first subpixel 241, the evaporation area of the light emitting element of the first subpixel 241, and the occurrence probability; determining a second display current according to the current densities corresponding to all gray scales of the second sub-pixel 242, the evaporation area of the light emitting element of the second sub-pixel 242 and the occurrence probability; determining a third display current according to the current densities corresponding to all gray scales of the third sub-pixel 243, the evaporation area of the light emitting element of the third sub-pixel 243, and the occurrence probability; and determining the display current according to the first display current, the second display current and the third display current.
Specifically, there is the formula:
I＝∑(I1*S1*n1)+∑(I2*S2*n2)+∑(I3*S3*n3)
wherein I is a display current, I1 is a first current density, I2 is a second current density, I3 is a third current density, S1 is a light emitting element deposition area of the first subpixel 241, n1 is a probability of occurrence of each gray level of the first subpixel 241, S2 is a light emitting element deposition area of the second subpixel 242, n2 is a probability of occurrence of each gray level of the second subpixel 242, S3 is a light emitting element deposition area of the third subpixel 243, and n3 is a probability of occurrence of each gray level of the third subpixel 243. The first current density, the second current density, and the third current density may be obtained by a correspondence relationship of the current density and the luminance.
The first sub-pixel 241 corresponds to a first display current, the second sub-pixel 242 corresponds to a second display current, and the third sub-pixel 243 corresponds to a third display current, so the display current is the sum of the first display current, the second display current, and the third display current.
Thus, after the current density, the evaporation area of the light-emitting element of the sub-pixel and the occurrence probability are obtained, the display current can be calculated by the sum of the currents of different gray scales of all the sub-pixels.
In some embodiments, the light emitting element deposition area of the first sub-pixel 241 is determined according to the aperture ratio of the first sub-pixel 241 and the total area of the first sub-pixel 241, the light emitting element deposition area of the second sub-pixel 242 is determined according to the aperture ratio of the second sub-pixel 242 and the total area of the second sub-pixel 242, and the light emitting element deposition area of the third sub-pixel 243 is determined according to the aperture ratio of the third sub-pixel 243 and the total area of the third sub-pixel 243.
Specifically, the vapor deposition area of the light emitting element of the sub-pixel can be calculated by the following formula:
S＝G*Sa
S1＝G1*Sa1，S2＝G2*Sa2，S3＝G3*Sa3
referring to fig. 10, S is a light emitting element evaporation area, G is an aperture ratio of a sub-pixel, sa is a total area of the sub-pixels, S1 is a light emitting element evaporation area of the first sub-pixel 241, G1 is an aperture ratio of the first sub-pixel 241, sa1 is a total area of the first sub-pixel 241, S2 is a light emitting element evaporation area of the second sub-pixel 242, G2 is an aperture ratio of the second sub-pixel 242, sa2 is a total area of the second sub-pixel 242, S3 is a light emitting element evaporation area of the third sub-pixel 243, G3 is an aperture ratio of the third sub-pixel 243, and Sa3 is a total area of the third sub-pixel 243.
Thus, the vapor deposition area of the light emitting element of the sub-pixel can be calculated by multiplying the aperture ratio of the sub-pixel by the total area of the sub-pixel.
In some embodiments, the display 20 stores a correspondence relationship between the display current and the voltage drop value, and step 01 further includes:
013, determining a voltage drop value according to the display current and the corresponding relation.
In some embodiments, the display 20 has stored therein a correspondence of display current and voltage drop values, step 013 may be implemented by the display driving element 22, i.e. the display driving element 22 may be configured to determine the voltage drop value according to the display current and the correspondence.
The correspondence between the display current and the voltage drop value is Δu=i×r, where Δu is the voltage drop value, I is the display current, and R is the total resistance of the display screen 20 element.
When the display screen 20 displays different pictures, the voltage drop value DeltaU is different due to different currents passing through the display screen 20, so that the voltage drop value DeltaU can be determined according to the display current I and the corresponding relation.
It will be appreciated that in some embodiments, the display screen 20 may include a memory (bank, memory chip, various logic or control circuits, etc.), and that the correspondence between the display current and the voltage drop value may be stored in the memory.
In this way, the voltage drop value can be determined by the correspondence relationship stored in the display 20 after the display current is acquired.
In some embodiments, the driving voltages are transmitted to the respective pixels 24 through the display driving element 22 and the driving signal line 23; the driving signal line 23 has a first resistance, the display driving element 22 has a second resistance, and the step 01 further includes:
014, determining the voltage drop value from the display current, the first resistance and the second resistance.
In certain embodiments, step 014 may be implemented by processor 10, i.e., processor 10 may be operable to determine a voltage drop value from the display current, the first resistance, and the second resistance.
In certain embodiments, step 014 may be implemented by display drive element 22, i.e., display drive element 22 may be operable to determine a voltage drop value based on the display current, the first resistance, and the second resistance.
The corresponding relation of the display current, the first resistor, the second resistor and the voltage drop value is R=R1+R2, deltaU=I×R=I×R (R1+R2), wherein DeltaU is the voltage drop value, I is the display current, R is the total resistor of the display 2020 element, R1 is the first resistor, and R2 is the second resistor.
The first resistor R1 of the driving signal line 23 and the second resistor R2 of the display driving element 22 may be tested by software or hardware to obtain the resistance values.
Therefore, the first resistance value and the second resistance value can be obtained through software or hardware testing, and the voltage drop value can be accurately determined through the display current value and the corresponding relation.
In some embodiments, the driving voltage is transmitted to each pixel through the flexible circuit board 25, the display driving element 22, and the driving signal line 23, the flexible circuit board 25 having a third resistance, and step 014 further includes:
0141, determining the voltage drop value from the display current, the first resistance, the second resistance and the third resistance.
In certain embodiments, step 0141 may be implemented by processor 10, i.e., processor 10 may be configured to determine a voltage drop value based on the display current, the first resistance, the second resistance, and the third resistance.
In certain embodiments, step 0141 may be implemented by display drive element 22, i.e., display drive element 22 may be operable to determine a voltage drop value based on the display current, the first resistance, the second resistance, and the third resistance.
The corresponding relation of the display current, the first resistor, the second resistor, the third resistor and the voltage drop value is R=R1+R2+R3, deltaU=I=R=I (R1+R2+R3), wherein DeltaU is the voltage drop value, I is the display current, R is the total resistance of the display screen 20 element, R1 is the first resistor, R2 is the second resistor and R3 is the third resistor.
The first resistor, the second resistor, and the third resistor of the flexible circuit board 25 can be detected in advance.
In this manner, the display driving element 22 may determine the voltage drop value according to the display current, the first resistance, the second resistance, and the third resistance.
Referring to fig. 11, in some embodiments, step 05 includes:
051 to send a preset number of pulses corresponding to the voltage value to be set to the dc voltage element 21 to make the dc voltage element
21 determines the voltage value to be set.
In some embodiments, step 051 may be implemented by the processor 10, i.e., the processor 10 may be configured to send a preset number of pulses corresponding to the voltage value to be set to the dc voltage element 21 to cause the dc voltage element 21 to determine the voltage value to be set.
In some embodiments, step 051 may be implemented by the display driving element 22, that is, the display driving element 22 may be configured to send a preset number of pulses corresponding to the voltage value to be set to the dc voltage element 21 so that the dc voltage element 21 determines the voltage value to be set.
Referring to fig. 12, in some embodiments, step 07 includes:
071, receiving a preset number of pulses corresponding to the voltage value to be set to determine the voltage value to be set.
In certain embodiments, step 071 may be implemented by the dc voltage element 21, i.e. the dc voltage element 21 may be configured to receive a preset number of pulses corresponding to the voltage value to be set to determine the voltage value to be set.
The dc voltage element 21 generates the driving voltage after receiving the pulses, and the number of the pulses received may be set to be different voltage values, for example, the voltage value to be set is higher when the number of the pulses is larger.
In one embodiment, after determining a voltage value to be set, the display driving element 22 sends x pulses to the dc voltage element 21, and the dc voltage element 21 receives the pulses and determines the voltage value to be set. If a higher voltage value to be set is determined, the display driving device 22 sends y pulses to the DC voltage device 21, where y is greater than x.
Referring to fig. 2 again, the electronic device 100 according to the embodiment of the present application includes a display screen 20 and a processor 10, where the display screen 20 includes a dc voltage element 21, and the dc voltage element 21 is used for generating a driving voltage; the processor 10 is configured to: determining display current according to a picture to be displayed; determining a voltage drop value based on the display current; determining a voltage value to be set according to the voltage drop value and transmitting the voltage value to be set to the direct-current voltage element 21; the dc voltage element 21 is configured to adjust a voltage value of the driving voltage to a voltage value to be set, and control the display screen 20 to display a picture to be displayed according to the voltage value to be set.
It is understood that the electronic device 100 includes, but is not limited to, a cell phone, tablet, head-mounted device, and the like.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, system that includes a processing module, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. It is to be understood that portions of embodiments of the present application may be implemented in hardware, software, firmware, or a combination thereof.
Those of ordinary skill in the art will appreciate that all or part of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in an electronic device readable storage medium, and the program, when executed, includes one or a combination of the steps of the method embodiments.
Furthermore, each functional unit in the embodiments of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated module may also be stored in an electronic device readable storage medium if implemented in the form of a software functional module and sold or used as a stand alone product.
Although the embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the embodiments described above by those of ordinary skill in the art within the scope of the application.
Claims (15)
1. A display control method for controlling a display screen to display a picture, characterized in that the display screen includes a direct-current voltage element for generating a driving voltage; the display control method includes:
determining display current according to a picture to be displayed;
determining a voltage drop value from the display current;
determining a voltage value to be set according to the voltage drop value, and sending the voltage value to be set to the direct-current voltage element so that the direct-current voltage element adjusts the voltage value of the driving voltage to the voltage value to be set;
controlling the display screen to display the picture to be displayed according to the voltage value to be set;
the determining the display current according to the picture to be displayed comprises the following steps:
acquiring a gray level distribution histogram of the picture to be displayed;
determining the display current according to the gray level distribution histogram and the evaporation area of the light-emitting element of the pixel, wherein the evaporation area of the light-emitting element is determined according to the aperture opening ratio of the pixel and the total area of the pixel;
the determining the display current according to the gray level distribution histogram and the evaporation area of the light emitting element of the pixel comprises the following steps:
determining each gray level and the corresponding occurrence probability according to the gray level distribution histogram;
determining corresponding brightness according to each gray level;
determining a corresponding current density according to the brightness;
and determining the display current according to the current density, the evaporation area of the light-emitting element and the occurrence probability corresponding to all the gray scales.
2. The display control method according to claim 1, wherein each of the pixels includes a first subpixel, a second subpixel, and a third subpixel, wherein the determining the display current according to the current density, the light emitting element deposition area, and the occurrence probability for all of the gray scales includes:
determining a first display current according to the current densities corresponding to all gray scales of the first sub-pixel, the evaporation areas of the light emitting elements of the first sub-pixel and the occurrence probability;
determining a second display current according to the current densities of all the gray scales of the second sub-pixel, the evaporation areas of the light emitting elements of the second sub-pixel and the occurrence probability;
determining a third display current according to the current densities of all the gray scales of the third sub-pixel, the evaporation areas of the light emitting elements of the third sub-pixel and the occurrence probability;
and determining the display current according to the first display current, the second display current and the third display current.
3. The display control method according to claim 2, wherein a light emitting element deposition area of the first sub-pixel is determined according to an aperture ratio of the first sub-pixel and a total area of the first sub-pixel, a light emitting element deposition area of the second sub-pixel is determined according to an aperture ratio of the second sub-pixel and a total area of the second sub-pixel, and a light emitting element deposition area of the third sub-pixel is determined according to an aperture ratio of the third sub-pixel and a total area of the third sub-pixel.
4. The display control method according to claim 1, wherein the correspondence between the display current and the voltage drop value is stored in the display screen, and the determining the display current according to the picture to be displayed includes:
and determining the voltage drop value according to the display current and the corresponding relation.
5. The display control method according to claim 1, wherein the driving voltage is transmitted to each pixel through a display driving element and a driving signal line; the driving signal line has a first resistance, the display driving element has a second resistance, and the determining of the display current according to the picture to be displayed includes:
the voltage drop value is determined from the display current, the first resistance, and the second resistance.
6. The display control method according to claim 1, wherein the determining a voltage value to be set according to the voltage drop value and transmitting the voltage value to be set to the dc voltage element to cause the dc voltage element to adjust the voltage value of the driving voltage to the voltage value to be set includes:
and sending a preset number of pulses corresponding to the voltage value to be set to the direct-current voltage element so that the direct-current voltage element determines the voltage value to be set.
7. A control method, characterized by a direct voltage element for use in a display device, the direct voltage element being for generating a driving voltage; the control method comprises the following steps:
receiving a voltage value to be set, wherein the voltage value to be set is determined according to a voltage drop value, the voltage drop value is determined according to a display current, and the display current is determined according to a picture to be displayed;
adjusting the voltage value of the driving voltage to the voltage value to be set;
the display current is determined according to a gray level distribution histogram of the picture to be displayed and a light-emitting element evaporation area of a pixel, and the light-emitting element evaporation area is determined according to an aperture ratio of the pixel and a total area of the pixel;
the gray level distribution histogram is used for determining each gray level and the corresponding occurrence probability, each gray level is used for determining the corresponding brightness, the brightness is used for determining the corresponding current density, and the current density corresponding to all the gray levels is used for determining the display current by combining the evaporation area of the light-emitting element and the occurrence probability.
8. The control method according to claim 7, wherein the receiving the voltage value to be set includes:
and receiving a preset number of pulses corresponding to the voltage value to be set to determine the voltage value to be set.
9. A processor for communicating with a dc voltage element for generating a drive voltage, the processor being configured to: determining a display current according to a picture to be displayed, determining a voltage drop value according to the display current, determining a voltage value to be set according to the voltage drop value, and sending the voltage value to be set to the direct-current voltage element so that the direct-current voltage element adjusts the voltage value of the driving voltage to the voltage value to be set;
the processor is further configured to: acquiring a gray level distribution histogram of the picture to be displayed, and determining the display current according to the gray level distribution histogram and the evaporation area of a light-emitting element of a pixel, wherein the evaporation area of the light-emitting element is determined according to the aperture ratio of the pixel and the total area of the pixel;
the processor is further configured to: determining each gray level and the corresponding occurrence probability according to the gray level distribution histogram; determining corresponding brightness according to each gray level; determining a corresponding current density according to the brightness; and determining the display current according to the current density, the evaporation area of the light-emitting element and the occurrence probability corresponding to all the gray scales.
10. A display screen comprising a dc voltage element for generating a drive voltage and a display drive element for: determining a display current according to a picture to be displayed, determining a voltage drop value according to the display current, determining a voltage value to be set according to the voltage drop value, and sending the voltage value to be set to the direct-current voltage element; the direct-current voltage element is used for adjusting the voltage value of the driving voltage to the voltage value to be set;
the display screen includes a plurality of pixels, and the display driving element is configured to: acquiring a gray level distribution histogram of the picture to be displayed; determining the display current according to the gray level distribution histogram and the evaporation area of the light-emitting element of the pixel;
the display driving element is further configured to: determining each gray level and the corresponding occurrence probability according to the gray level distribution histogram; determining corresponding brightness according to each gray level; determining a corresponding current density according to the brightness; and determining the display current according to the current density, the evaporation area of the light-emitting element and the occurrence probability corresponding to all the gray scales.
11. The display screen of claim 10, wherein the driving voltages are transmitted to the respective pixels through display driving elements and driving signal lines; the drive signal line has a first resistance, the display drive element has a second resistance, and the display drive element is further configured to: the voltage drop value is determined from the display current, the first resistance, and the second resistance.
12. The display screen of claim 10, wherein the display drive element is further configured to: and sending a preset number of pulses corresponding to the voltage value to be set to the direct-current voltage element so that the direct-current voltage element determines the voltage value to be set.
13. A dc voltage element for generating a driving voltage; the direct current voltage element is also used for: receiving a voltage value to be set, wherein the voltage value to be set is determined according to a voltage drop value, the voltage drop value is determined according to a display current, and the display current is determined according to a picture to be displayed; adjusting the voltage value of the driving voltage to the voltage value to be set;
the display current is determined according to a gray level distribution histogram of the picture to be displayed and a light-emitting element evaporation area of a pixel, and the light-emitting element evaporation area is determined according to an aperture ratio of the pixel and a total area of the pixel;
the gray level distribution histogram is used for determining each gray level and the corresponding occurrence probability, each gray level is used for determining the corresponding brightness, the brightness is used for determining the corresponding current density, and the current density corresponding to all the gray levels is used for determining the display current by combining the evaporation area of the light-emitting element and the occurrence probability.
14. The dc voltage element of claim 13, wherein the dc voltage element is configured to receive a preset number of pulses corresponding to the voltage value to be set to determine the voltage value to be set.
15. An electronic device comprising a direct voltage element for generating a driving voltage and a processor; the processor is configured to: determining display current according to a picture to be displayed; determining a voltage drop value from the display current; determining a voltage value to be set according to the voltage drop value and sending the voltage value to be set to the direct-current voltage element; the direct-current voltage element is used for adjusting the voltage value of the driving voltage to the voltage value to be set;
the processor is further configured to: acquiring a gray level distribution histogram of the picture to be displayed, and determining the display current according to the gray level distribution histogram and the evaporation area of a light-emitting element of a pixel, wherein the evaporation area of the light-emitting element is determined according to the aperture ratio of the pixel and the total area of the pixel;
the processor is further configured to: determining each gray level and the corresponding occurrence probability according to the gray level distribution histogram; determining corresponding brightness according to each gray level; determining a corresponding current density according to the brightness; and determining the display current according to the current density, the evaporation area of the light-emitting element and the occurrence probability corresponding to all the gray scales.
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