Display control method and device

Abstract

The present disclosure relates to the technical field of electronic devices, and specifically provides a display control method and device. The display control method includes: in the voltage transformation stage of the display module, generating a driving voltage corresponding to each update cycle according to pre-stored white balance parameters; the voltage transformation stage is a stage in which the voltage difference between the positive voltage and the negative voltage of the display module is transformed from a first voltage difference to a second voltage difference; the voltage transformation stage includes at least two update cycles; and according to the driving voltage, controlling the light-emitting device in the pixel circuit of the display module to emit light in the corresponding update cycle. The disclosed method avoids color abnormalities in the display module during the voltage transformation stage, thereby improving user experience.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic equipment, and in particular to a display control method and device. Background Art

[0002] OLED (Organic Light-Emitting Diode) has the advantages of self-luminescence, low power consumption, and thin and light stacking. It is currently widely used in electronic device display screens.

[0003] In related technologies, some OLED displays have color rendering issues when switching between display interfaces. For example, at low brightness, when a mobile phone screen switches from the lock screen to the desktop display, the screen may flash green, affecting the user experience. Summary of the Invention

[0004] In order to solve the technical problem of abnormal OLED display in the related art, the embodiments of the present disclosure provide a display control method, device, electronic device and storage medium.

[0005] In a first aspect, an embodiment of the present disclosure provides a display control method, comprising:

[0006] During a voltage transformation phase of the display module, a driving voltage corresponding to each update period is generated according to pre-stored white balance parameters; the voltage transformation phase is a phase in which the voltage difference between the positive voltage and the negative voltage of the display module is transformed from a first voltage difference to a second voltage difference; the voltage transformation phase includes at least two of the update periods;

[0007] According to the driving voltage, the light-emitting device in the pixel circuit of the display module is controlled to emit light in a corresponding update period.

[0008] In some embodiments, the method further comprises:

[0009] Based on the corresponding relationship between the voltage difference of the display module and the luminous intensity of the light-emitting device in each sub-pixel circuit, a corresponding relationship between the voltage difference and the white balance parameter is obtained;

[0010] Obtaining the white balance parameter corresponding to each update period according to the relationship between the voltage difference and time during the voltage transformation phase, and the corresponding relationship between the voltage difference and the white balance parameter;

[0011] The white balance parameters corresponding to each update period are stored to obtain the pre-stored white balance parameters.

[0012] In some embodiments, the method further comprises:

[0013] Acquire a first duration of the voltage transformation phase and a display period of a single-frame image of the display module; the first duration is a duration during which the voltage difference of the display module changes from the first voltage difference to the second voltage difference;

[0014] At least two update periods are determined according to the first duration and the display period.

[0015] In some implementations, determining at least two update periods based on the first duration and the display period includes:

[0016] It is determined that in the voltage transformation stage, the display period of each frame of image is one of the update periods.

[0017] In some implementations, determining at least two update periods based on the first duration and the display period includes:

[0018] The sum of display periods of a plurality of consecutive frames of images in the voltage transformation phase is determined to be the update period.

[0019] In some embodiments, the method further comprises:

[0020] Based on the corresponding relationship between the voltage difference of the display module and the luminous intensity of the light-emitting device in each sub-pixel circuit, a corresponding relationship between the voltage difference and the white balance parameter is obtained;

[0021] Determine the white balance parameter corresponding to each display period according to the relationship between the voltage difference and time during the voltage transformation stage, and the corresponding relationship between the voltage difference and the white balance parameter;

[0022] For one of the update cycles, determining the white balance parameters corresponding to the update cycle based on the white balance parameters corresponding to each display cycle in the update cycle;

[0023] The white balance parameters corresponding to each update period are stored to obtain the pre-stored white balance parameters.

[0024] In some embodiments, for one update period, determining the white balance parameter corresponding to the update period based on the white balance parameters corresponding to each display period in the update period includes:

[0025] For one update cycle, obtaining white balance parameters corresponding to each display cycle in the update cycle;

[0026] The median value of the white balance parameters corresponding to each display period is determined as the white balance parameter corresponding to the update period.

[0027] In some embodiments, the display module is an OLED display module, and the pixel circuit includes a red sub-pixel circuit, a green sub-pixel circuit, and a blue sub-pixel circuit.

[0028] In a second aspect, an embodiment of the present disclosure provides a display control device, comprising:

[0029] a voltage generating module configured to generate a driving voltage corresponding to each update period according to pre-stored white balance parameters during a voltage transformation phase of the display module; the voltage transformation phase being a phase in which the voltage difference between the positive voltage and the negative voltage of the display module is transformed from a first voltage difference to a second voltage difference; the voltage transformation phase comprising at least two of the update periods;

[0030] The control module is used to control the light-emitting device in the pixel circuit of the display module to emit light in a corresponding update period according to the driving voltage.

[0031] In some embodiments, the device further comprises:

[0032] a first determining module, configured to obtain a correspondence between the voltage difference and a white balance parameter based on a correspondence between the voltage difference of the display module and the luminous intensity of the light-emitting device in each sub-pixel circuit;

[0033] a second determining module, configured to obtain the white balance parameter corresponding to each update period according to a relationship between the voltage difference and time during the voltage transformation phase, and a corresponding relationship between the voltage difference and the white balance parameter;

[0034] The first storage module is used to store the white balance parameters corresponding to each update period to obtain the pre-stored white balance parameters.

[0035] In some embodiments, the device further comprises:

[0036] an acquisition module, configured to acquire a first duration of the voltage transformation phase and a display period of a single-frame image of the display module; the first duration being the duration during which the voltage difference of the display module changes from the first voltage difference to the second voltage difference;

[0037] The third determining module is configured to determine at least two update periods according to the first duration and the display period.

[0038] In some implementations, the third determining module is specifically configured to:

[0039] It is determined that in the voltage transformation stage, the display period of each frame of image is one of the update periods.

[0040] In some implementations, the third determining module is specifically configured to:

[0041] The sum of display periods of a plurality of consecutive frames of images in the voltage transformation phase is determined to be the update period.

[0042] In some embodiments, the device further comprises:

[0043] a fourth determining module, configured to obtain a corresponding relationship between the voltage difference and a white balance parameter based on a corresponding relationship between the voltage difference of the display module and the luminous intensity of the light-emitting device in each sub-pixel circuit;

[0044] a fifth determining module, configured to determine the white balance parameter corresponding to each display period according to a relationship between the voltage difference and time during the voltage transformation stage, and a correspondence between the voltage difference and the white balance parameter;

[0045] a sixth determining module, configured to determine, for one update period, a white balance parameter corresponding to the update period based on the white balance parameters corresponding to each display period in the update period;

[0046] The second storage module is used to store the white balance parameters corresponding to each update period to obtain the pre-stored white balance parameters.

[0047] In some implementations, the sixth determining module is specifically configured to:

[0048] For one update cycle, obtaining white balance parameters corresponding to each display cycle in the update cycle;

[0049] The median value of the white balance parameters corresponding to each display period is determined as the white balance parameter corresponding to the update period.

[0050] In some embodiments, the display module is an OLED display module, and the pixel circuit includes a red sub-pixel circuit, a green sub-pixel circuit, and a blue sub-pixel circuit.

[0051] In a third aspect, an embodiment of the present disclosure provides an electronic device, including:

[0052] Display module;

[0053] processor; and

[0054] A memory storing computer-readable instructions readable by the processor, wherein when the computer-readable instructions are read, the processor executes the method according to any one of the embodiments of the first aspect.

[0055] In a fourth aspect, an embodiment of the present disclosure provides a storage medium storing computer-readable instructions, wherein the computer-readable instructions are used to enable a computer to execute the method described in any embodiment of the first aspect.

[0056] The display control method of the disclosed embodiment generates a driving voltage corresponding to each update cycle based on pre-stored white balance parameters during the voltage transition phase of the display module. Based on the driving voltage, the light-emitting devices in the pixel circuit are controlled to emit light during the corresponding update cycle. By dividing the voltage transition phase into multiple update cycles and setting corresponding white balance parameters for each update cycle, the display module maintains color balance during the voltage transition phase, avoiding color rendering anomalies during the voltage transition phase and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0058] Figure 1 It is a schematic diagram of an OLED pixel circuit in related art.

[0059] Figure 2 It is a schematic diagram of the principle of the voltage transformation stage in the related art.

[0060] Figure 3 It is a graph showing the relationship between the luminous intensity and the voltage difference VF of a light-emitting device in the related art.

[0061] Figure 4 is a flowchart of a display control method according to some embodiments of the present disclosure.

[0062] Figure 5 is a flowchart of a display control method according to some embodiments of the present disclosure.

[0063] Figure 6 is a graph showing the relationship between the luminous intensity and the voltage difference VF of the light-emitting device according to some embodiments of the present disclosure.

[0064] Figure 7 is a flowchart of a display control method according to some embodiments of the present disclosure.

[0065] Figure 8 is a flowchart of a display control method according to some embodiments of the present disclosure.

[0066] Figure 9 It is a schematic diagram showing the principle of the control method in some embodiments of the present disclosure.

[0067] Figure 10 It is a structural block diagram of a display control device according to some embodiments of the present disclosure.

[0068] Figure 11 It is a diagram of the structure of a computer system suitable for implementing the method disclosed herein. DETAILED DESCRIPTION

[0069] The technical solutions of the present disclosure will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure. In addition, the technical features involved in the different embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other.

[0070] OLED (Organic Light-Emitting Diode) screens are now widely used in electronic devices such as smartphones and tablets. The OLED module uses a driver chip to provide power to the panel. The driver chip generally provides three voltages to control the OLED's light emission: the screen's positive voltage (ELVDD), the screen's negative voltage (ELVSS), and the analog power supply voltage (AVDD). Figure 1 The sub-pixel circuit of OLED is shown in the figure. Figure 1 Briefly explain the principle of OLED light emission.

[0071] like Figure 1 As shown, the light-emitting device 10 is the sub-pixel light-emitting diode of the OLED, typically a red, green, or blue light-emitting diode. Data is the AVDD voltage divider, i.e., the driving voltage. Specifically, at different display brightness levels of the OLED, the voltage difference VF between ELVDD and ELVSS can be set to multiple voltage difference levels. In a certain level, the voltage difference VF between ELVDD and ELVSS remains constant. For example, at a certain display brightness level of the OLED, the voltage difference VF between ELVDD and ELVSS is constant. By adjusting the driving voltage Data of each sub-pixel circuit, the opening degree of the transistor T1 is controlled, thereby controlling the luminous intensity of the light-emitting device 10 and achieving normal display of the screen.

[0072] Some electronic devices with OLED screens experience color distortion when switching between display interfaces. For example, in low-light conditions, an OLED phone may experience a green screen flash when switching from the lock screen to the desktop interface, significantly impacting the user experience.

[0073] Based on the above-mentioned defects, the inventors of this case discovered through research that the abnormal color display occurs because the VF (the voltage difference between ELVDD and ELVSS) of the front and rear display interfaces is different, and the VF changes over a certain period of time. When the duration of the VF change exceeds a certain threshold, the change process can be captured by the human eye. At the same time, according to the aforementioned OLED light-emitting principle, it can be seen that VF changes will affect the luminous intensity of the light-emitting device 10, and different color sub-pixels are affected differently by VF. Through research, the inventors of this case found that the green sub-pixel is more sensitive to the brightness change caused by VF. Therefore, the green sub-pixel is out of balance with the red and blue sub-pixels during the VF change process, which is externally manifested as a green screen flash.

[0074] Taking OLED screen phones as an example, with the development of full-screen phones, some phones use optical under-screen fingerprint sensors. On the lock screen, to increase screen brightness and ensure fingerprint recognition success rate, the positive voltage ELVDD is usually 4.6V and the negative voltage ELVSS is -4.4V, with VF = 4.6-(-4.4) = 9V. However, in low brightness conditions, when the desktop is displayed after unlocking, the positive voltage ELVDD is 4.6V and the negative voltage ELVSS increases to -2.6V, with VF = 4.6-(-2.6) = 7.2V. In other words, at the moment the screen is unlocked, ELVSS changes from -4.6V to -2.6V.

[0075] like Figure 2 As shown, the first display interface is the lock screen interface, and the second display interface is the unlocked desktop interface. In the first display interface, ELVSS is V1 = -4.4V, in which case the white balance parameter of the OLED pixel is b1. In the second display interface, ELVSS is V2 = -2.6V, in which case the white balance parameter of the OLED pixel is b2. White balance parameters are parameters that maintain the RGB color balance of the OLED screen, which will be understood by those skilled in the art and need not be elaborated on.

[0076] However, when the first display interface switches to the second display interface, there is a voltage transition stage T. The duration of the voltage transition stage T (t2-t1) can reach 200ms, which is long enough for the human eye to detect. Since the ELVSS changes linearly during the voltage transition stage, the white balance parameter b2 under V2 cannot be applied during the voltage transition stage, which means that the OLED screen will have color abnormalities. Figure 3 As shown, as VF changes, the intensity of the red (R), green (G), and blue (B) light-emitting devices varies unequally. The green G light-emitting device is more sensitive to VF changes than the red (R), green (G), and blue (B) light-emitting devices. Therefore, during the voltage change phase, the light intensity of the green G light-emitting device rapidly decays to maintain balance with the red (R) and blue (B) light-emitting devices. This results in the screen flashing green at the moment the display interface switches.

[0077] Based on the above research by the inventors of this case, the embodiments of the present disclosure provide a display control method, device, electronic device and storage medium to solve the above-mentioned problem of abnormal OLED color display.

[0078] In a first aspect, an embodiment of the present disclosure provides a display control method, the execution subject of the method may be a processor of an electronic device or a driver chip of an OLED module. Figure 4 The display control method in some embodiments of the present disclosure is shown in FIG.

[0079] like Figure 4 As shown, in some embodiments, the display control method of the present disclosure includes:

[0080] S410 : In the voltage transformation stage of the display module, a driving voltage corresponding to each update period is generated according to pre-stored white balance parameters.

[0081] S420 , controlling the light-emitting devices in the pixel circuit of the display module to emit light in a corresponding update period according to the driving voltage.

[0082] Specifically, the display module is an OLED screen component, and the voltage transformation stage refers to the stage where the voltage difference VF between the positive voltage ELVDD and the negative voltage ELVSS changes from a first voltage difference to a second voltage difference. Figure 2 In the example, the voltage change stage T is generated when the display module switches from the first display interface to the second display interface.

[0083] It should be understood that the disclosed method is not limited to switching between two display interfaces. It should be understood that it is applicable to all scenarios where color display anomalies are caused by changes in the voltage difference VF. For example, the process of switching from the lock screen to the unlock screen of a mobile phone; or the process of VF changing from a first voltage difference to a second voltage difference when the brightness of the display module changes. This disclosure does not limit this.

[0084] When the VF of the display module is at a first voltage difference, the white balance parameters are the first white balance parameters, that is, when VF is at the first voltage difference, the display module maintains RGB color balance under the first white balance parameters. When the VF of the display module is at a second voltage difference, the white balance parameters are the second white balance parameters, that is, when VF is at the second voltage difference, the display module maintains RGB color balance under the second white balance parameters.

[0085] During the voltage transition phase, however, the second white balance parameter is not applicable. Directly using the second white balance parameter would result in abnormal color rendering on the OLED screen. Therefore, the control method of the disclosed embodiment does not use the second white balance parameter. Instead, the voltage transition phase is divided into multiple update cycles, and white balance parameters corresponding to each update cycle are pre-set and stored. This allows the display module to maintain RGB color balance during each update cycle, preventing abnormal screen color rendering.

[0086] An update cycle refers to dividing the voltage conversion phase into multiple white balance parameter adjustment cycles, with each update cycle corresponding to a white balance parameter. It will be appreciated that a greater number of update cycles, i.e., more refined adjustments to the white balance parameters during the voltage conversion phase, will result in better color adjustment. For example, the display cycle of each image frame can be set as an update cycle, which is equivalent to setting a white balance parameter for each image frame, thereby performing white balance adjustment for each image frame. Of course, considering computing speed and cost, the number of update cycles can be reduced accordingly, for example, by setting a white balance parameter every other frame. This example is explained below and will not be detailed here. However, it will be understood that this disclosure does not limit the number of update cycles.

[0087] In the voltage transformation stage, the driving voltage Data corresponding to each update period can be generated according to the pre-set and stored white balance parameters, so as to control the light-emitting devices of each R, G, and B sub-pixel to emit light in the corresponding update period according to the driving voltage Data. Figure 2 In this example, since the green G light-emitting device's light intensity varies more significantly, the driving voltage Data for the green G light-emitting device can be lowered to maintain a balance with the light intensity of the red R and blue B light-emitting devices within each update cycle. Since the white balance parameters for normal color rendering are pre-set for each update cycle, the color balance of the three RGB colors can be maintained throughout each update cycle, ensuring that the screen maintains normal color rendering during the voltage transition phase.

[0088] In one example, white balance parameters for each update cycle can be obtained based on the corresponding relationship between the luminous intensity of each sub-pixel light-emitting device and VF. The white balance parameters for each update cycle are stored to obtain pre-stored white balance parameters. This example is described below and is not detailed here.

[0089] From the above, it can be seen that the control method of the embodiment of the present disclosure divides the voltage conversion stage into multiple update cycles and sets corresponding white balance parameters for each update cycle, so that the display module maintains color balance during the voltage conversion stage, avoids color abnormalities of the display module during the voltage conversion stage, and improves user experience.

[0090] It will be appreciated that, in some embodiments, the display control method disclosed herein comprises two phases: the first, during device production, in which white balance parameters for the voltage conversion phase are determined and pre-stored; and the second, during device use, in which the voltage conversion phase is adjusted based on the pre-stored white balance parameters. Taking electronic devices as an example, during device production, the manufacturer should determine and store the white balance parameters in the device's memory. When a user purchases and uses the electronic device, the electronic device's processor can access the stored white balance parameters in the memory to execute the method in any embodiment of the disclosure. This is explained in detail below.

[0091] In some embodiments, the control method of the present disclosure further includes a process of determining and storing white balance parameters during the voltage conversion phase. Specifically, Figure 5 As shown, the display control method disclosed herein further includes:

[0092] S510 : Obtain a corresponding relationship between the voltage difference and the white balance parameter based on the corresponding relationship between the voltage difference of the display module and the luminous intensity of the light-emitting device in each sub-pixel circuit.

[0093] like Figure 6 As shown, Figure 6 (a) shows the corresponding relationship curve between the voltage difference VF and the forward current IF of the red R, green G, and blue B light emitting devices. Figure 6 (b) shows the corresponding relationship curve between the forward current IF and the luminous intensity Lm of the red R, green G, and blue B light emitting devices. Figure 6 In (b), it can be seen that the luminous intensity of the green G light-emitting device changes more with the forward current IF. Figure 6 (a) and (b) can be used to obtain the corresponding relationship between the luminous intensity Lm and VF of the red R, green G, and blue B light-emitting devices, that is, Figure 6 (c). Figure 6 As can be seen in (c), the luminous intensity of the green G light-emitting device changes more greatly with VF.

[0094] based on Figure 6 The curve shown in (c) shows the difference in luminous intensity of the red (R), green (G), and blue (B) light-emitting devices at different VFs. Based on the difference values, the corresponding relationship between the RGB balance parameters and VF can be determined, that is, the corresponding relationship curve between VF and white balance parameters can be obtained.

[0095] S520 , obtaining white balance parameters corresponding to each update period according to the relationship between the voltage difference and time during the voltage transformation phase, and the corresponding relationship between the voltage difference and the white balance parameters.

[0096] After obtaining the corresponding relationship curve between VF and white balance parameters, combined with Figure 2The linear variation curve of VF over time shown in can be used to obtain the corresponding relationship between the white balance parameters and time in the variation stage, and then the white balance parameters corresponding to each update cycle can be determined based on the corresponding relationship.

[0097] In an example, assuming that the display period of each frame image is an update period, the white balance parameters of each frame image, ie, the white balance parameters of the update period, are determined according to the corresponding relationship between the white balance parameters and time.

[0098] In another example, assuming that the sum of the display periods of multiple consecutive image frames is one update period, the white balance parameter corresponding to the median of the update period is determined as the white balance parameter for the update period based on the correspondence between the white balance parameter and time. This will be explained below and will not be described in detail here.

[0099] S530: Store the white balance parameters corresponding to each update period to obtain pre-stored white balance parameters.

[0100] Specifically, after obtaining the white balance parameters of each update cycle, they can be stored in, for example, a memory of the electronic device, and the memory is communicatively connected to the processor of the electronic device, so that when the electronic device is subsequently used, the processor can retrieve the pre-stored white balance parameters from the memory to perform, for example Figure 4 The method steps shown.

[0101] From the above, it can be seen that the display control method of the embodiment of the present disclosure obtains the white balance parameters corresponding to each update cycle based on the correspondence between the voltage difference VF and the luminous intensity of each sub-pixel, so that the parameters of each update cycle can be adjusted according to the white balance parameters during the voltage transformation stage, so that the display module maintains color balance during the voltage transformation stage, avoids color rendering abnormalities of the display module during the voltage transformation stage, and improves user experience.

[0102] In some embodiments, the update period of the voltage transformation phase can be determined according to the display period of a single frame image and the total duration of the voltage transformation phase. Figure 7 The process of determining the update period of the voltage transformation stage according to some embodiments of the present disclosure is shown in FIG. Figure 7 Provide explanation.

[0103] like Figure 7 As shown, in some embodiments, the display control method disclosed herein includes:

[0104] S710: Acquire a first duration of the voltage transformation phase and a display period of a single-frame image of the display module.

[0105] Specifically, the first duration of the voltage transformation phase refers to the duration during which the voltage difference VF of the display module changes from the first voltage difference to the second voltage difference.

[0106] The display period of a single-frame image can be determined based on the refresh rate of the device screen. In one example, assuming the screen refresh rate of the electronic device is 100 Hz, meaning the screen displays 100 frames per second, the display period of a single-frame image can be calculated to be 10 ms. It should be understood that the present disclosure is not limited to this example.

[0107] S720: Determine at least two update cycles according to the first duration and the display cycle.

[0108] In some implementations, it may be determined that during the voltage transformation phase, the display period of each frame of image is one update period.

[0109] Specifically, using the previous example, assuming the screen refresh rate of the electronic device is 100Hz, meaning it displays 100 frames per second, the display period of a single frame can be calculated to be 10ms. In other words, the 10ms display period of each frame is considered an update period, resulting in each update period being 10ms.

[0110] From the above, it can be seen that by taking the display period of each frame of image as an update period, it is equivalent to setting a white balance parameter for each frame of image, thereby adjusting the white balance for each frame of image. The more refined the adjustment of the white balance parameter in the voltage transformation stage, the better the color adjustment effect.

[0111] In other implementations, the sum of display periods of multiple consecutive image frames during the voltage transformation phase may be determined as the update period.

[0112] Specifically, using the aforementioned example, assuming the screen refresh rate of the electronic device is 100 Hz, meaning it displays 100 frames per second, the display period of a single frame can be calculated to be 10 ms. The sum of the display periods of five consecutive frames can be determined as one update period, meaning one update period includes five display periods, or 50 ms. Of course, it is understood that the update period can also include other numbers of display periods and is not limited to this example.

[0113] It is worth noting that, in this embodiment, the process of determining the white balance parameters corresponding to the update period can be found in Figure 8 As shown below, combined Figure 8 Provide explanation.

[0114] like Figure 8 As shown, in this embodiment, the display control method disclosed herein includes:

[0115] S810 : Based on the corresponding relationship between the voltage difference of the display module and the luminous intensity of the light-emitting device in each sub-pixel circuit, obtain the corresponding relationship between the voltage difference and the white balance parameter.

[0116] Specifically, please refer to the aforementioned step S510, which will not be repeated here.

[0117] S820: Determine the white balance parameter corresponding to each display period according to the relationship between the voltage difference and time during the voltage transformation phase, and the corresponding relationship between the voltage difference and the white balance parameter.

[0118] Specifically, after obtaining the corresponding relationship curve between VF and white balance parameters, combined with Figure 2 The linear curve of VF change over time shown in FIG can be used to obtain the corresponding relationship between the white balance parameter and time during the change stage. Then, the white balance parameter corresponding to each display cycle can be determined based on the corresponding relationship. In other words, the white balance parameter corresponding to each frame of the image can be determined.

[0119] S830: For one update period, determine the white balance parameter corresponding to the update period based on the white balance parameters corresponding to each display period in the update period.

[0120] Specifically, after obtaining the white balance parameters corresponding to the display period of each frame image, since one update period includes multiple display periods, for one update period, the median of the white balance parameters corresponding to each display period can be determined, and the median is used as the white balance parameter corresponding to the update period.

[0121] S840: Store the white balance parameters corresponding to each update period to obtain pre-stored white balance parameters.

[0122] Specifically, please refer to the aforementioned step S530, which will not be repeated here.

[0123] From the above, it can be seen that by determining the sum of the display periods of multiple consecutive image frames as one update period, the amount of calculation can be reduced and the calculation efficiency can be improved while ensuring a certain white balance adjustment effect.

[0124] Figure 9 The principle of the control method in one embodiment of the present disclosure is shown below. Figure 9 The embodiments illustrate the principle of the disclosed method.

[0125] like Figure 9 As shown, in this embodiment, the application scenario is Figure 2 The same example applies: a smartphone switches from the locked first display interface to the unlocked second display interface. In the first display interface, the ELVSS is V1 = -4.4V, corresponding to the white balance parameter C1; while in the second display interface, the ELVSS is V2 = -2.6V, corresponding to the white balance parameter C2. Assume that the duration of the voltage transition phase T is t2 - t1 = 200ms, and the display period of a single frame of the phone is 10ms.

[0126] The voltage transition phase T theoretically includes a total of 200 / 10 = 20 image display cycles. In one example, the display cycle of each image frame is set to one update cycle, that is, the voltage transition phase T includes 20 update cycles (not all of which are shown in the figures). Each update cycle is set and stored according to the aforementioned method with a corresponding white balance parameter, namely d1, d2, d3, ... d20 (not all of which are shown in the figures).

[0127] During the voltage transformation phase T, the corresponding white balance parameters are used to adjust the light intensity of the green G light-emitting device for each update cycle. Specifically, in this embodiment, since the light intensity of the green G light-emitting device varies more significantly, the driving voltage Data of the green G light-emitting device can be lowered to maintain a balance with the light intensity of the red R and blue B light-emitting devices within each update cycle, thereby achieving color balance.

[0128] Of course, those skilled in the art will appreciate that, in another example, the display period of multiple consecutive image frames can also be set as one update period. For example, two consecutive image frames are set as one update period, that is, the voltage transformation stage T includes 10 update periods, each of which is set and stored according to the aforementioned method with a corresponding white balance parameter, namely d1, d2, d3, ... d10 (not all are shown in the accompanying drawings). The principle of this example is the same as above, and those skilled in the art can implement it, so it will not be repeated here.

[0129] From the above, it can be seen that in this embodiment, by dividing the voltage conversion stage into multiple update cycles and setting corresponding white balance parameters for each update cycle, the display module maintains color balance during the voltage conversion stage, avoiding color abnormalities in the display module during the voltage conversion stage, and improving user experience.

[0130] In a second aspect, an embodiment of the present disclosure provides a display control device, which can be applied to electronic equipment. Figure 10 Shows a display control device in some embodiments of the present disclosure, such as Figure 10 As shown, the display control device includes:

[0131] The voltage generation module 101 is configured to generate a driving voltage corresponding to each update period according to pre-stored white balance parameters during a voltage transformation phase of the display module. The voltage transformation phase is a phase in which the voltage difference between the positive voltage and the negative voltage of the display module is transformed from a first voltage difference to a second voltage difference. The voltage transformation phase includes at least two update periods.

[0132] The control module 102 is used to control the light-emitting devices in the pixel circuit of the display module to emit light in the corresponding update period according to the driving voltage.

[0133] From the above, it can be seen that the control device of the embodiment of the present disclosure divides the voltage conversion stage into multiple update cycles and sets corresponding white balance parameters for each update cycle, so that the display module maintains color balance during the voltage conversion stage, avoids color abnormalities of the display module during the voltage conversion stage, and improves user experience.

[0134] In some embodiments, the display control device further includes:

[0135] A first determining module is configured to obtain a corresponding relationship between the voltage difference and the white balance parameter based on a corresponding relationship between the voltage difference of the display module and the luminous intensity of the light-emitting device in each sub-pixel circuit;

[0136] A second determination module is configured to obtain the white balance parameter corresponding to each update period according to the relationship between the voltage difference and time during the voltage transformation phase and the corresponding relationship between the voltage difference and the white balance parameter;

[0137] The first storage module is used to store the white balance parameters corresponding to each update period to obtain pre-stored white balance parameters.

[0138] In some embodiments, the display control device further includes:

[0139] An acquisition module is used to acquire a first duration of the voltage transformation phase and a display period of a single frame image of the display module; the first duration is the duration during which the voltage difference of the display module changes from the first voltage difference to the second voltage difference;

[0140] The third determining module is configured to determine at least two update periods according to the first duration and the display period.

[0141] In some implementations, the third determination module is specifically configured to:

[0142] During the voltage transformation phase, the display period of each frame of image is determined to be one update period.

[0143] In some implementations, the third determination module is specifically configured to:

[0144] During the voltage transformation phase, the sum of the display periods of the continuous multiple-frame images is determined to be the update period.

[0145] In some embodiments, the display control device further includes:

[0146] a fourth determining module, configured to obtain a corresponding relationship between the voltage difference and the white balance parameter based on a corresponding relationship between the voltage difference of the display module and the luminous intensity of the light-emitting device in each sub-pixel circuit;

[0147] a fifth determining module, configured to determine the white balance parameter corresponding to each display period according to a relationship between a change in the voltage difference over time and a correspondence between the voltage difference and the white balance parameter during the voltage transformation phase;

[0148] a sixth determining module, configured to determine, for one update cycle, a white balance parameter corresponding to the update cycle based on the white balance parameters corresponding to each display cycle in the update cycle;

[0149] The second storage module is used to store the white balance parameters corresponding to each update period to obtain pre-stored white balance parameters.

[0150] In some implementations, the sixth determining module is specifically configured to:

[0151] For an update cycle, obtain the white balance parameters corresponding to each display cycle in the update cycle;

[0152] The median value of the white balance parameters corresponding to each display period is determined as the white balance parameter corresponding to the update period.

[0153] In some embodiments, the display module is an OLED display module, and the pixel circuit includes a red sub-pixel circuit, a green sub-pixel circuit, and a blue sub-pixel circuit.

[0154] From the above, it can be seen that the control device of the embodiment of the present disclosure divides the voltage conversion stage into multiple update cycles and sets corresponding white balance parameters for each update cycle, so that the display module maintains color balance in the voltage conversion stage, avoids color abnormalities in the display module during the voltage conversion stage, and improves user experience. In some embodiments, by taking the display cycle of each frame of image as an update cycle, it is equivalent to setting a white balance parameter for each frame of image, so that white balance adjustment is performed for each frame of image, and the more refined the adjustment of the white balance parameters in the voltage conversion stage, the better the color adjustment effect. In other embodiments, by determining the sum of the display cycles of multiple consecutive frames of images as an update cycle, the amount of calculation is reduced and the calculation efficiency is improved while ensuring a certain white balance adjustment effect.

[0155] In a third aspect, embodiments of the present disclosure provide an electronic device, which may be, for example, a smartphone, a tablet computer, etc. In some embodiments, the electronic device may include a display module, a processor, and a memory.

[0156] The display module can be an OLED display module in any of the above embodiments. The processor is communicatively connected to the memory, and the memory stores computer-readable instructions that can be read by the processor. When the computer-readable instructions are read, the processor executes the method in any of the embodiments of the first aspect.

[0157] In a fourth aspect, an embodiment of the present disclosure provides a storage medium storing computer-readable instructions, wherein the computer-readable instructions are used to enable a computer to execute the method according to any embodiment of the first aspect.

[0158] Specifically, Figure 11 A schematic diagram of the structure of a computer system 600 suitable for implementing the method disclosed herein is shown. Figure 11 The system shown can realize the corresponding functions of the above-mentioned processor and storage medium.

[0159] like Figure 11 As shown, computer system 600 includes a processor (CPU) 601, which can perform various appropriate actions and processes according to a program stored in memory 602 or a program loaded from storage section 608 into memory 602. Various programs and data required for the operation of system 600 are also stored in memory 602. CPU 601 and memory 602 are connected to each other via bus 604. An input / output (I / O) interface 605 is also connected to bus 604.

[0160] The following components are connected to the I / O interface 605: an input section 606 including a keyboard, a mouse, and the like; an output section 607 including devices such as a cathode ray tube (CRT), a liquid crystal display (LCD), and a speaker; a storage section 608 including a hard disk; and a communication section 609 including a network interface card such as a LAN card or a modem. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as needed. A removable medium 611, such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, is installed in the drive 610 as needed, so that computer programs read therefrom can be installed into the storage section 608 as needed.

[0161] In particular, according to embodiments of the present disclosure, the above method process can be implemented as a computer software program. For example, embodiments of the present disclosure include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program comprising program code for executing the above method. In such embodiments, the computer program can be downloaded and installed from a network via the communication portion 609 and / or installed from a removable medium 611.

[0162] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of code, and the module, program segment, or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of the boxes in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0163] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the embodiments. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present disclosure.

Claims

1. A display control method, characterized in that: include: During the voltage transformation phase of the display module, the driving voltage corresponding to each update cycle is generated according to the pre-stored white balance parameters; The voltage transformation stage is a stage in which the voltage difference between the positive voltage and the negative voltage of the display module is transformed from a first voltage difference to a second voltage difference; the voltage transformation stage includes at least two update cycles; the pre-stored white balance parameters include white balance parameters corresponding to each update cycle; According to the driving voltage, controlling the light-emitting device in the pixel circuit of the display module to emit light in a corresponding update period; The method further comprises: Acquire a first duration of the voltage transformation phase and a display period of a single-frame image of the display module; the first duration is a duration during which the voltage difference of the display module changes from the first voltage difference to the second voltage difference; At least two update periods are determined according to the first duration and the display period.

2. The method according to claim 1, characterized in that Also includes: Based on the corresponding relationship between the voltage difference of the display module and the luminous intensity of the light-emitting device in each sub-pixel circuit, a corresponding relationship between the voltage difference and the white balance parameter is obtained; Obtaining the white balance parameter corresponding to each update period according to the relationship between the voltage difference and time during the voltage transformation phase, and the corresponding relationship between the voltage difference and the white balance parameter; The white balance parameters corresponding to each update period are stored to obtain the pre-stored white balance parameters.

3. The method according to claim 1, characterized in that Determining at least two update periods according to the first duration and the display period includes: It is determined that in the voltage transformation stage, the display period of each frame of image is one of the update periods.

4. The method according to claim 1, wherein Determining at least two update periods according to the first duration and the display period includes: The sum of display periods of a plurality of consecutive frames of images in the voltage transformation phase is determined to be the update period.

5. The method according to claim 4, characterized in that Also includes: Based on the corresponding relationship between the voltage difference of the display module and the luminous intensity of the light-emitting device in each sub-pixel circuit, a corresponding relationship between the voltage difference and the white balance parameter is obtained; Determine the white balance parameter corresponding to each display period according to the relationship between the voltage difference and time during the voltage transformation stage, and the corresponding relationship between the voltage difference and the white balance parameter; For one of the update cycles, determining the white balance parameters corresponding to the update cycle based on the white balance parameters corresponding to each display cycle in the update cycle; The white balance parameters corresponding to each update period are stored to obtain the pre-stored white balance parameters.

6. The method according to claim 5, characterized in that For one update period, determining the white balance parameter corresponding to the update period based on the white balance parameters corresponding to each display period in the update period includes: For one update cycle, obtaining white balance parameters corresponding to each display cycle in the update cycle; The median value of the white balance parameters corresponding to each display period is determined as the white balance parameter corresponding to the update period.

7. The method according to any one of claims 1 to 6, characterized in that The display module is an OLED display module, and the pixel circuit includes a red sub-pixel circuit, a green sub-pixel circuit, and a blue sub-pixel circuit.

8. A display control device, characterized in that: include: A voltage generation module is used to generate a driving voltage corresponding to each update cycle according to pre-stored white balance parameters during the voltage transformation phase of the display module; The voltage transformation stage is a stage in which the voltage difference between the positive voltage and the negative voltage of the display module is transformed from a first voltage difference to a second voltage difference; the voltage transformation stage includes at least two update cycles; the pre-stored white balance parameters include white balance parameters corresponding to each update cycle; A control module, configured to control the light-emitting devices in the pixel circuit of the display module to emit light in a corresponding update period according to the driving voltage; Also includes: an acquisition module, configured to acquire a first duration of the voltage transformation phase and a display period of a single-frame image of the display module; the first duration being the duration during which the voltage difference of the display module changes from the first voltage difference to the second voltage difference; The third determining module is configured to determine at least two update periods according to the first duration and the display period.

9. The device according to claim 8, characterized in that Also includes: a first determining module, configured to obtain a correspondence between the voltage difference and a white balance parameter based on a correspondence between the voltage difference of the display module and the luminous intensity of the light-emitting device in each sub-pixel circuit; a second determining module, configured to obtain the white balance parameter corresponding to each update period according to a relationship between the voltage difference and time during the voltage transformation phase, and a corresponding relationship between the voltage difference and the white balance parameter; The first storage module is used to store the white balance parameters corresponding to each update period to obtain the pre-stored white balance parameters.

10. The device according to claim 8, characterized in that The third determining module is specifically configured to: It is determined that in the voltage transformation stage, the display period of each frame of image is one of the update periods.

11. The device according to claim 8, characterized in that The third determining module is specifically configured to: The sum of display periods of a plurality of consecutive frames of images in the voltage transformation phase is determined to be the update period.

12. The device according to claim 11, characterized in that Also includes: a fourth determining module, configured to obtain a corresponding relationship between the voltage difference and a white balance parameter based on a corresponding relationship between the voltage difference of the display module and the luminous intensity of the light-emitting device in each sub-pixel circuit; a fifth determining module, configured to determine the white balance parameter corresponding to each display period according to a relationship between the voltage difference and time during the voltage transformation stage, and a correspondence between the voltage difference and the white balance parameter; a sixth determining module, configured to determine, for one update period, a white balance parameter corresponding to the update period based on the white balance parameters corresponding to each display period in the update period; The second storage module is used to store the white balance parameters corresponding to each update period to obtain the pre-stored white balance parameters.

13. The device according to claim 12, characterized in that The sixth determining module is specifically configured to: For one update cycle, obtaining white balance parameters corresponding to each display cycle in the update cycle; The median value of the white balance parameters corresponding to each display period is determined as the white balance parameter corresponding to the update period.

14. The device according to any one of claims 8 to 13, characterized in that The display module is an OLED display module, and the pixel circuit includes a red sub-pixel circuit, a green sub-pixel circuit, and a blue sub-pixel circuit.

15. An electronic device, characterized in that: include: Display module; processor; as well as A memory storing computer-readable instructions readable by the processor, wherein when the computer-readable instructions are read, the processor executes the method according to any one of claims 1 to 7.

16. A storage medium, characterized in that Computer-readable instructions are stored, and the computer-readable instructions are used to enable a computer to execute the method according to any one of claims 1 to 7.

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