CN113077767B - Display method and electronic device - Google Patents
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- CN113077767B CN113077767B CN202110349767.5A CN202110349767A CN113077767B CN 113077767 B CN113077767 B CN 113077767B CN 202110349767 A CN202110349767 A CN 202110349767A CN 113077767 B CN113077767 B CN 113077767B
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133621—Illuminating devices providing coloured light
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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
- G09G2340/00—Aspects of display data processing
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Abstract
The technical scheme of the application discloses a display method and electronic equipment, wherein the display method comprises the following steps: obtaining target parameters of the backlight module; converting the display data of the display module from the first display data to second display data based on the target parameter; the display module is positioned in the irradiation range of the backlight beam emitted by the backlight module; and the display module displays an image based on the second display data.
Description
Technical Field
The present disclosure relates to the field of image display technologies, and in particular, to a display method and an electronic device.
Background
With the continuous development of science and technology, more and more electronic devices with display functions are widely applied to daily life and work of people, bring great convenience to the daily life and work of people, and become an indispensable important tool for people at present.
The main component of the electronic device implementing the display function is a display panel, wherein a liquid crystal display panel is one of the mainstream display panels nowadays. The liquid crystal display panel comprises a display module and a backlight module which are oppositely arranged. The display module can display images based on display data and backlight beams emitted by the backlight module.
Display image of a liquid crystal display panel of an electronic device has display deviation, which affects image display quality.
Disclosure of Invention
In view of this, the present application provides a display method and an electronic device, and the scheme is as follows:
a display method, comprising:
obtaining target parameters of the backlight module;
converting the display data of the display module from the first display data to second display data based on the target parameter; the display module is positioned in the irradiation range of the backlight beam emitted by the backlight module;
and the display module displays an image based on the second display data.
Preferably, in the above display method, based on the target parameter, the converting the display data of the display module from the first display data to the second display data includes:
if the target parameter meets a trigger condition, converting the first display data into the second display data; the triggering condition is a condition which can represent that the backlight beam emitted by the backlight module is changed from a first color to a second color.
Preferably, in the display method, the backlight beam with the first color can form a first perceived color through the display module which inputs the first display data;
the backlight beam with the second color can form a second perception color through the display module which inputs the first display data;
the backlight beam with the second color can form a third perception color through the display module which inputs the second display data;
wherein a difference between the third perceived color and the first perceived color is less than a difference between the second perceived color and the first perceived color.
Preferably, in the above display method, the method of determining whether the target parameter satisfies the trigger condition includes: if the target parameter and the standard parameter meet a preset relationship, the trigger condition is met;
the method for obtaining the target parameter comprises the following steps: and acquiring the driving current of a light-emitting unit in the backlight module and the ambient temperature of the light-emitting unit.
Preferably, in the above display method, the converting the first display data into the second display data includes:
determining a correction coefficient based on the target parameter;
determining the second display data based on the correction coefficient and the first display data.
Preferably, in the above display method, the method of determining the correction coefficient includes:
determining a tristimulus value according to the color coordinates of the backlight beam;
determining the correction coefficient based on the tristimulus value and the first display data, so that the tristimulus value and the second display data meet a display standard condition;
wherein the second display data is equal to a product of the first display data and the correction coefficient.
Preferably, in the display method, the backlight module has a plurality of backlight assemblies located in different regions; the backlight assembly corresponds to a plurality of display assemblies in the display module;
the converting the first display data into the second display data includes:
if the target parameter of the backlight assembly meets the trigger condition, converting the display data of a plurality of display assemblies corresponding to the backlight assembly from the first display data to the second display data;
wherein if the target parameter of the backlight assembly does not satisfy the trigger condition, display data of a plurality of display assemblies corresponding to the backlight assembly is maintained at the first display data.
The present application further provides an electronic device, which includes:
the backlight module is used for emitting a backlight beam;
the display module is positioned in the irradiation range of the backlight beam;
the controller is used for obtaining a target parameter of the backlight module, converting display data of the display module from first display data to second display data based on the target parameter, and controlling the display module to display images based on the second display data.
Preferably, in the electronic device, a temperature sensor connected to the controller is provided, and the temperature sensor is configured to obtain an ambient temperature of the backlight module; the controller is connected with the backlight module through a backlight driving circuit, and the backlight driving circuit is used for providing driving current for the backlight module; wherein the target parameters include: the drive current and the ambient temperature.
Preferably, in the electronic device, if it is determined that the target parameter meets a trigger condition, the controller converts the first display data into the second display data; the triggering condition is a condition which can represent that the backlight beam emitted by the backlight module is changed from a first color to a second color;
the backlight beam with the first color can form a first perception color through the display module which inputs the first display data; the backlight beam with the second color can form a second perception color through the display module which inputs the first display data; the backlight beam with the second color can form a third perception color through the display module which inputs the second display data; wherein a difference between the third perceived color and the first perceived color is less than a difference between the second perceived color and the first perceived color;
the controller is used for determining a modification coefficient based on the target parameter, and determining the second display data based on the modification coefficient and the first display data;
the controller is used for determining a tristimulus value according to the color coordinates of the backlight light beam, and determining the correction coefficient based on the tristimulus value and the first display data so that the tristimulus value and the first display data meet a display standard condition; wherein the second display data is equal to a product of the first display data and the correction coefficient;
the backlight module is provided with a plurality of backlight components positioned in different areas; the backlight assembly corresponds to a plurality of display assemblies in the display module; the controller is configured to convert display data corresponding to a plurality of display elements of the backlight assembly from the first display data to the second display data if a target parameter of the backlight assembly satisfies the trigger condition; wherein if the target parameter of the backlight assembly does not satisfy the trigger condition, display data of a plurality of display assemblies corresponding to the backlight assembly is maintained at the first display data.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in related technologies, the drawings used in the embodiments or descriptions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
The structures, proportions, and dimensions shown in the drawings and described in the specification are for illustrative purposes only and are not intended to limit the scope of the present disclosure, which is defined by the claims, but rather by the claims, it is understood that these drawings and their equivalents are merely illustrative and not intended to limit the scope of the present disclosure.
FIG. 1 is a graph of chromaticity versus drive current for an LED at 25 ℃;
FIG. 2 is a graph of luminance versus ambient temperature at a drive current of 20 mA;
FIG. 3 is a graph of chromaticity versus ambient temperature for a drive current of 20 mA;
fig. 4 is a schematic flowchart of a display method according to an embodiment of the present application;
fig. 5 is a flowchart illustrating a method for converting first display data into second display data according to an embodiment of the present disclosure;
fig. 6 is a flowchart of a method for determining a correction coefficient according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Fig. 8 is a schematic structural diagram of another electronic device according to an embodiment of the present application.
Detailed Description
Embodiments of the present application will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the application are shown, and in which it is to be understood that the embodiments described are merely illustrative of some, but not all, of the embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
The liquid crystal display panel is provided with a backlight module and a display module, the backlight module is used for emitting white backlight beams, the display module is in the irradiation range of the backlight beams, and the display module can display images based on display data and the backlight beams emitted by the backlight module.
The applicant finds that the chromaticity of an image displayed by the liquid crystal display panel is mainly determined by the chromaticity of a backlight beam emitted by the backlight module, and a color film and a liquid crystal box in the display module. When the liquid crystal display panel leaves a factory, the influence of a color film and a liquid crystal box in the display module on the chromaticity is fixed and unchanged, and the chromaticity of the backlight beam is influenced by the driving current of a light-emitting unit in the backlight module and the ambient temperature of the light-emitting unit.
The backlight module is provided with a plurality of light-emitting units which are arranged in an array, wherein the light-emitting units are OLEDs (organic light-emitting diodes), micro LEDs (Micro light-emitting diodes) or MiniLEDs (sub-millimeter light-emitting diodes). The brightness of the backlight can be changed by adjusting the driving current of the light-emitting unit, and the brightness of the backlight is further adjusted.
The brightness of all the light-emitting units can be synchronously controlled, and the backlight brightness in the backlight module is integrally adjusted, so that the requirements of users on different display brightness are met.
The backlight module can also be provided with a plurality of backlight components positioned in different areas, the backlight component is provided with at least one light-emitting unit, different backlight components correspond to different light-emitting units, and the brightness of the light-emitting units of the different backlight components is respectively controlled, so that the regional backlight adjustment is realized. The area backlight adjustment manner can be applied to HDR (high dynamic range image) display.
In the embodiment of the present application, the light emitting unit is a Mini LED as an example, and it is obvious that the light emitting unit may also be a Micro LED or an OLED by analyzing the operating characteristics.
The applicant has found that the adjustment of the driving current of the light-emitting unit causes the chromaticity of the white backlight beam to be deviated, and the chromaticity of the backlight beam to be deviated due to the difference of the ambient temperature under the condition of a certain driving current.
As shown in fig. 1, fig. 1 is a graph of chromaticity of an LED at 25 ℃ and a driving current, and the horizontal axis and the vertical axis in fig. 1 are two color coordinates x and y under the CIE (international commission on illumination) standard, and it is understood from fig. 1 that, when the driving current is adjusted at 5mA to 70mA at the same ambient temperature Ta =25 ℃, the white backlight beam color coordinates are different at different driving currents at the same ambient temperature Ta. In the embodiment of the present application, the ambient temperature is a temperature at which the light emitting unit in the backlight module is located.
As shown in fig. 2, fig. 2 is a graph of luminance versus ambient temperature when the driving current is 20mA, and in fig. 2, the horizontal axis represents ambient temperature and the vertical axis represents normalized light emission luminance, and it is understood from fig. 2 that the higher the ambient temperature is, the lower the light emission luminance is, when the driving current IF is 20mA is constant.
As shown in fig. 3, fig. 3 is a graph of chromaticity versus ambient temperature when the driving current is 20mA, and the horizontal axis and the vertical axis in fig. 3 are two color coordinates x and y under the CIE standard, and as can be seen from fig. 2, when the driving current IF is 20mA, both the color coordinates x and y gradually decrease with the increase of the ambient temperature.
In a conventional display method, display data is provided for a display module based on a standard white backlight beam and display contents of a light-emitting unit under standard parameters (a nominal ambient temperature and a nominal driving current). However, as shown in fig. 1-3, due to the variation of the ambient temperature and/or the driving current, the chromaticity of the backlight beam emitted from the backlight module may deviate from the standard white backlight beam, thereby causing the display deviation problem of the displayed image. The calibration environment temperature and the rated driving current are set based on requirements, for example, the calibration environment temperature can be set to be 25 ℃, the rated driving current can be 20mA, and the standard parameters can be set based on requirements, and are not limited to the exemplary mode of the embodiment of the application.
In order to solve the above problems, the present application provides a display method and an electronic device, which do not need to adjust a backlight module, and can convert display data of the display module from first display data to second display data based on a target parameter of the backlight module, so that the display module displays an image based on the second display data, and can reduce or even solve a display deviation caused by a change of an emergent backlight beam of the backlight module, and improve display quality.
As shown in fig. 4, fig. 4 is a schematic flowchart of a display method provided in an embodiment of the present application, where the display method is used to control a display panel of an electronic device to display an image, and the display method includes:
step S11: and obtaining target parameters of the backlight module.
As can be seen from the related description and analysis of fig. 1-3, the driving current of the light emitting unit in the backlight module and the ambient temperature can affect the chromaticity of the backlight beam emitted from the backlight module. Therefore, in the embodiment of the present application, the setting of the target parameter of the backlight module includes: the driving current of the light emitting unit and the ambient temperature at which it is located.
Step S12: and converting the display data of the display module from the first display data to the second display data based on the target parameter.
The display module is located in an irradiation range of the backlight beam emitted by the backlight module, and the display module can display images based on display data and the backlight beam emitted by the backlight module.
Step S13: and the display module displays an image based on the second display data.
The backlight module has the advantages that target parameters of the backlight module are different, so that the backlight beam has different chromaticity, the backlight module does not need to be adjusted, the display data of the display module are adjusted to obtain second display data adaptive to the current backlight beam, the display module displays images through the second display data, display deviation caused by the change of the backlight beam emitted by the backlight module is reduced or even solved, and the display quality is improved.
In this application embodiment, convert the display data of display module assembly into the second display data by first display data, include: if the target parameter meets a trigger condition, converting the first display data into the second display data; the triggering condition is a condition that the backlight beam emitted by the backlight module can be changed from a first color to a second color, that is, when the triggering condition is met, the color of the backlight beam emitted by the backlight module is changed and deviates from a standard white backlight beam, and the display module displays an image based on the second display data by converting the first display data into the second display data, so that the display deviation caused by the fact that the backlight beam is changed from the first color to the second color is reduced or even solved.
In the display method according to the embodiment of the present application, the backlight beam of the first color is a standard white backlight beam based on a standard parameter, and there is no color deviation. The backlight beam of the second color is a white backlight of a non-standard parameter, having a color deviation from a standard white backlight.
The backlight beam with the first color is adapted to the first display data, the first display data and the second display data meet a display standard condition, the backlight beam with the first color can form a first perception color through the display module which inputs the first display data, an image with the first perception color is displayed based on the backlight beam with the first color and the adapted first display data, and the image has no display deviation.
The backlight beam of the second color is different from the backlight of the first color, the backlight beam of the second color is not adapted to the first display data, and the backlight beam of the second color and the first display data do not satisfy the display standard condition.
And converting the first display data into second display data, wherein the backlight beam with the second color is adapted to the second display data, the backlight beam with the second color and the second display data meet the display standard condition, the backlight beam with the second color can form a third perception color through a display module which inputs the second display data, and an image is displayed based on the backlight beam with the second color and the adapted second display data, and the image has no display deviation.
The difference between the third perceived color and the first perceived color is smaller than the difference between the second perceived color and the first perceived color, and the problem of display deviation of an image caused by the fact that the backlight beam of the first color is not matched with display data due to the fact that the backlight beam of the first color is changed into the backlight beam of the second color is solved.
As described above, the target parameters of the backlight module in the embodiment of the present application include: the driving current of the light emitting unit and the ambient temperature at which it is located. Therefore, in the display method, the method for obtaining the target parameter includes: and acquiring the driving current of a light-emitting unit in the backlight module and the ambient temperature of the light-emitting unit.
In the display method according to the embodiment of the present application, the method for determining whether the target parameter satisfies the trigger condition includes: and if the target parameter and the standard parameter meet a preset relationship, the triggering condition is met. As mentioned above, the standard parameters are known parameters that are calibrated before the factory shipment of the device. Determining whether the target parameter and the standard parameter satisfy a preset relationship comprises: and determining whether the target parameter and the standard parameter meet the same condition, if so, not meeting the triggering condition, and if not, meeting the triggering condition. In the embodiment of the present application, the target parameter and the standard parameter satisfying the same condition means that the target parameter and the standard parameter are the same or the difference does not exceed a set threshold. The setting threshold may be set based on a demand, the smaller the setting threshold, the easier the trigger condition is satisfied, the higher the sensitivity for solving the image display deviation is, the larger the setting threshold, the less easily the trigger condition is satisfied, the lower the sensitivity for solving the image display deviation is, the display method is performed, the display data conversion is performed.
In an embodiment of the present application, the method for converting the first display data into the second display data is shown in fig. 5, where fig. 5 is a schematic flow chart of the method for converting the first display data into the second display data according to the embodiment of the present application, and the method includes:
step S21: based on the target parameter, a correction factor is determined.
Step S22: and determining the second display data based on the correction coefficient and the first display data.
As mentioned above, the standard parameters include: and calibrating the ambient temperature and the rated driving current. And when the driving current of the light-emitting unit and the rated driving current meet the same condition, and the environment temperature where the light-emitting unit is located and the calibrated environment temperature meet the same condition, the triggering condition is not met. And if the driving current of the light-emitting unit and the rated driving current do not meet the same condition, and/or the environment temperature where the light-emitting unit is located and the calibrated environment temperature do not meet the same condition, meeting the triggering condition.
The white backlight beam emitted by the backlight module satisfies the following relation:
in the above formula (1), X, Y, and Z are tristimulus values of the spectrum of the CIE1931 standard chromaticity observer, X and Y represent color coordinates of the white backlight beam, and Z is a parameter related to X and Y, and under the standard parameters, X, Y, Z, X, Y, and Z are known parameters.
x, y, z satisfy the following relationship:
x+y+z＝1 (2)
under the display standard condition, the tristimulus values X, Y and Z and the first preset display data R, G and B of the display module have the following relations:
in the embodiment of the present application, the constant matrix T is set as follows:
t is a coefficient matrix related to the standard parameters and the design parameters of the display panel (including the display module and the backlight module), and may be set based on the requirements, and is not limited to the manner shown in the above formula (4).
As described above, when the driving current of the light emitting unit in the backlight module and/or the ambient temperature change, the color shift of the backlight beam emitted from the backlight module is generated, and the color coordinate changes, which results in the change of the tristimulus value, and the changed tristimulus value is not adapted to the first display data R, G, and B, and does not satisfy the display standard condition, i.e., does not satisfy the relationship shown in the above formula (3).
The display method can determine a correction coefficient based on a target parameter, and convert first display data R, G and B into second display data R, ' G ' and B ' based on the correction coefficient and the first display data R, G and B, so that the changed tri-stimulus values X ', Y ' and Z ' are adapted to the second display data R, ' G ' and B ', display standard conditions are met, and the problem of image display deviation of a display module caused by color cast of a backlight beam emitted by the backlight module is reduced or even solved.
In the display method according to the embodiment of the present application, a method for determining the correction coefficient is shown in fig. 6, where fig. 6 is a flowchart of a method for determining the correction coefficient according to the embodiment of the present application, and the method includes:
step S31: and determining the tristimulus values according to the color coordinates of the backlight light beams.
Step S33: and determining the correction coefficient based on the tristimulus value and the first display data, so that the tristimulus value and the second display data meet a display standard condition.
Wherein the second display data R, ' G ', B ' is equal to a product of the first display data R, G, B and the correction coefficient.
The color coordinates of the backlight beam may be determined based on the target parameter. The method for determining the color coordinates of the backlight beam based on the target parameters at least comprises the following three modes:
in the first mode, the electronic device pre-tests and stores the color coordinates of the backlight beams corresponding to different driving currents and ambient temperatures. In this way, after the target parameters are obtained, the corresponding color coordinates can be determined by looking up the table.
In a second way, a first set of graphs can be stored, including a plurality of first graphs, and different first graphs are graphs of the color coordinates and the driving current of the backlight beam at different ambient temperatures. For example, the first graph includes fig. 1, the target parameter is set to be the ambient temperature of the light emitting unit at 25 ℃, the driving current is 60mA, and the color coordinate corresponding to the target parameter can be determined based on the graph shown in fig. 1.
In a second manner, N first graphs, which are graphs of the color coordinates and the driving current of the backlight beam at the 1 st environmental temperature to the nth environmental temperature respectively, may be provided, where N is a positive integer greater than N. The 1 st ambient temperature to the nth ambient temperature are gradually increased or gradually decreased, and the step value from the 1 st ambient temperature to the nth ambient temperature may be set based on the requirement, and may be 5 ℃ or 10 ℃. The 1 st ambient temperature and the nth ambient temperature are set based on the common geographical location of the electronic device, and if the 1 st ambient temperature and the nth ambient temperature are gradually increased, the 1 st ambient temperature may be set to be-20 ℃ and the nth ambient temperature may be set to be 40 ℃.
And when the first curve graph is determined based on the current target parameter, if the ith environmental temperature from the 1 st environmental temperature to the Nth environmental temperature is the same as the environmental temperature of the light-emitting unit in the target parameter, determining the color coordinate by using the first curve graph corresponding to the ith environmental temperature, wherein i is a positive integer not greater than N. And if the 1 st to Nth environmental temperatures are different from the environmental temperature of the light-emitting unit in the target parameter, determining the color coordinate by using a first curve chart corresponding to one of the 1 st to Nth environmental temperatures with the minimum difference value with the environmental temperature of the light-emitting unit in the target parameter.
In a third way, a second curve set may be stored, where the second curve set includes a plurality of second curves, and different second curves are curves of the color coordinates of the backlight beam and the ambient temperature under different driving currents. For example, the second graph includes fig. 3, the target parameter is set to 25 ℃ of the ambient temperature of the light emitting unit and 20mA of the driving current, and the color coordinate corresponding to the target parameter can be determined based on the curve shown in fig. 3.
In a third manner, M second graphs of the backlight beam color coordinates and the ambient temperature at the 1 st to M th driving currents, respectively, may be provided, where M is a positive integer greater than 1. The 1 st driving current to the Mth driving current are gradually increased or decreased, the step values of the 1 st driving current to the Mth driving current can be set based on requirements, and the step values can be 5mA or mA. The 1 st to Mth driving currents are set based on the minimum and maximum driving currents provided by the backlight driving circuit connected to the light emitting unit, for example, when the 1 st to Mth driving currents are gradually increased, the 1 st driving current may be set to be 5mA, and the Mth driving current may be set to be 70mA.
And when the second curve is determined based on the current target parameter, if the j-th driving current in the 1 st to M-th driving currents is the same as the driving current of the light emitting unit in the target parameter, determining the color coordinate by using a second curve graph corresponding to the j-th driving current, wherein j is a positive integer not greater than M. If the 1 st to Mth driving currents are different from the driving current of the light emitting unit in the target parameter, determining the color coordinate by using a second graph corresponding to one of the 1 st to Mth driving currents having the smallest difference from the driving current of the light emitting unit in the target parameter.
After determining the color coordinates of the backlight beam corresponding to the current target parameter, the current tristimulus values X ', Y ', Z ' may be determined based on the above equation (1). After determining the current tristimulus values X ', Y ', Z ', a correction coefficient a may be determined based on the above equation (2), so that the tristimulus values and the second display data satisfy a display standard condition, that is, satisfy the following relationship:
in the display method according to the embodiment of the present application, based on the above principle, the correction coefficients corresponding to different target parameters may also be pre-calculated and stored, and after the target parameters are determined, a table is looked up to obtain the corresponding power correction coefficients, so as to convert the first display data into the second display data.
The backlight module can be provided with a plurality of backlight assemblies positioned in different areas, and the backlight assemblies can independently adjust the brightness so as to realize area backlight adjustment. The backlight assembly corresponds to the plurality of display assemblies in the display module. The display assembly includes at least a red sub-pixel, a green sub-pixel, and a blue sub-pixel. At this time, the converting the first display data into the second display data includes: and if the target parameter of the backlight assembly meets the trigger condition, converting the display data of a plurality of display assemblies corresponding to the backlight assembly from the first display data to the second display data. If the target parameter of the backlight assembly does not satisfy the trigger condition, the display data of the plurality of display assemblies corresponding to the backlight assembly is maintained in the first display data, and the implementation principle may refer to the above description, which is not described herein again.
Based on the foregoing embodiment, another embodiment of the present application further provides an electronic device, where the electronic device is shown in fig. 7, and fig. 7 is a schematic structural diagram of the electronic device provided in the embodiment of the present application, and the electronic device includes:
the backlight module 11 is used for emitting a backlight beam;
the display module 12, the said display module 12 locates in the illumination range of the said back light beam;
the controller 13 is connected to the backlight module 11 and the display module 12, and the controller 13 is configured to obtain a target parameter of the backlight module 11, convert display data of the display module 12 from first display data to second display data based on the target parameter, and control the display module 13 to display an image based on the second display data.
As shown in fig. 8, fig. 8 is a schematic structural diagram of another electronic device provided in the embodiment of the present application, based on the manner shown in fig. 7, the electronic device shown in fig. 8 further has a temperature sensor 14 connected to the controller 13, where the temperature sensor 14 is used to obtain a temperature parameter of the backlight module 11; the controller 13 is connected to the backlight module through a backlight driving circuit, and the backlight driving circuit is used for providing driving current for the backlight module; wherein the target parameters include: the drive current and the ambient temperature.
If the controller 13 determines that the target parameter meets the trigger condition, converting the first display data into the second display data; wherein the triggering condition is a condition that can represent that the backlight beam emitted by the backlight module 11 changes from a first color to a second color;
the backlight beam with the first color can form a first perception color through the display module 12 which inputs the first display data; the backlight beam of the second color can form a second perceived color through the display module 12 inputting the first display data; the backlight beam of the second color can form a third perceived color through the display module 12 inputting the second display data; wherein a difference between the third perceived color and the first perceived color is less than a difference between the second perceived color and the first perceived color.
The controller 13 is configured to determine a modification coefficient based on the target parameter, and determine the second display data based on the modification coefficient and the first display data.
The controller 13 is configured to determine a tristimulus value according to the color coordinates of the backlight beam, and determine the correction coefficient based on the tristimulus value and the first display data, so that the tristimulus value and the first display data satisfy a display standard condition; wherein the second display data is equal to a product of the first display data and the correction coefficient.
The backlight module 11 has a plurality of backlight components located in different areas; the backlight assembly corresponds to a plurality of display assemblies in the display module 12; the controller 13 is configured to convert display data of a plurality of display elements corresponding to the backlight assembly from the first display data to the second display data if the target parameter of the backlight assembly satisfies the trigger condition; wherein if the target parameter of the backlight assembly does not satisfy the trigger condition, display data of a plurality of display assemblies corresponding to the backlight assembly is maintained at the first display data.
The controller 13 can control the electronic device to implement the display method, so that the display deviation caused by the variation of the backlight emitted by the backlight module 11 can be reduced or even solved, and the display quality is improved. According to the technical scheme, the color difference caused by the driving current and the ambient temperature can be compensated, so that a better image display effect is realized, the hardware structure of equipment does not need to be changed, the cost is low, and the display effect is good.
The embodiments in the present description are described in a progressive manner, or in a parallel manner, or in a combination of a progressive manner and a parallel manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments can be referred to each other. For the electronic device disclosed in the embodiment, since the electronic device corresponds to the display method disclosed in the embodiment, the description is relatively simple, and relevant parts can be described by referring to the corresponding part of the display method.
It should be noted that in the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only used for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrases "comprising one of the elements 8230 \8230;" does not exclude the presence of additional like elements in an article or device comprising the same element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A display method, comprising:
obtaining target parameters of the backlight module; the driving current of a light-emitting unit in the backlight module and the ambient temperature can influence the chromaticity of a backlight beam of the backlight module;
converting the display data of the display module from the first display data to second display data based on the target parameter; the display module is positioned in an irradiation range of the backlight beam emitted by the backlight module;
the display module displays an image based on the second display data;
the display data with display module assembly is by first display data conversion second display data, include:
if the target parameter meets a trigger condition, converting the first display data into the second display data; the triggering condition is a condition which can represent that the backlight beam emitted by the backlight module is changed from a first color to a second color;
the backlight beam with the first color can form a first perception color through the display module which inputs the first display data; the backlight beam with the second color can form a second perception color through the display module which inputs the first display data; the backlight beam with the second color can form a third perception color through the display module which inputs the second display data; wherein the backlight beam of the first color is adapted to the first display data, both satisfying a display criterion condition; the backlight beam of the second color is not matched with the first display data, and the display standard condition is not met; the backlight beam of the second color is adapted to the second display data, and both meet the display standard condition; the difference between the third perceived color and the first perceived color is less than the difference between the second perceived color and the first perceived color.
2. The display method according to claim 1, wherein the method of determining whether the target parameter satisfies the trigger condition includes: if the target parameter and the standard parameter meet a preset relationship, the trigger condition is met;
the method for obtaining the target parameter comprises the following steps: and acquiring the driving current of a light-emitting unit in the backlight module and the ambient temperature of the light-emitting unit.
3. The display method of claim 1, the converting the first display data into the second display data, comprising:
determining a correction coefficient based on the target parameter;
and determining the second display data based on the correction coefficient and the first display data.
4. The display method according to claim 3, the method of determining the correction coefficient comprising:
determining a tristimulus value according to the color coordinates of the backlight beam;
determining the correction coefficient based on the tristimulus value and the first display data, so that the tristimulus value and the second display data meet a display standard condition;
wherein the second display data is equal to a product of the first display data and the correction coefficient.
5. The display method according to claim 1, wherein the backlight module has a plurality of backlight assemblies located in different regions; the backlight assembly corresponds to a plurality of display assemblies in the display module;
the converting the first display data into the second display data includes:
if the target parameter of the backlight assembly meets the trigger condition, converting the display data of a plurality of display assemblies corresponding to the backlight assembly from the first display data to the second display data;
wherein if the target parameter of the backlight assembly does not satisfy the trigger condition, display data of a plurality of display assemblies corresponding to the backlight assembly is maintained at the first display data.
6. An electronic device, the electronic device comprising:
the backlight module is used for emitting a backlight beam; the driving current of a light-emitting unit in the backlight module and the ambient temperature can influence the chromaticity of a backlight beam of the backlight module;
the display module is positioned in the irradiation range of the backlight beam;
the controller is connected with the backlight module and the display module respectively, and is used for obtaining a target parameter of the backlight module, converting display data of the display module from first display data to second display data based on the target parameter, and controlling the display module to display an image based on the second display data;
if the controller determines that the target parameter meets a trigger condition, converting the first display data into the second display data; the triggering condition is a condition which can represent that the backlight beam emitted by the backlight module is changed from a first color to a second color;
the backlight beam with the first color can form a first perception color through the display module which inputs the first display data; the backlight beam with the second color can form a second perception color through the display module which inputs the first display data; the backlight beam with the second color can form a third perception color through the display module which inputs the second display data; wherein the backlight beam of the first color is adapted to the first display data, both satisfying a display criterion condition; the backlight beam of the second color is not matched with the first display data, and the display standard condition is not met; the backlight beam of the second color is adapted to the second display data, and both meet the display standard condition; the difference between the third perceived color and the first perceived color is less than the difference between the second perceived color and the first perceived color.
7. The electronic device of claim 6, having a temperature sensor connected to the controller, the temperature sensor being configured to obtain an ambient temperature of the backlight module; the controller is connected with the backlight module through a backlight driving circuit, and the backlight driving circuit is used for providing driving current for the backlight module; wherein the target parameters include: the drive current and the ambient temperature.
8. The electronic device of claim 6, wherein the electronic device,
the controller is configured to determine a modification coefficient based on the target parameter, and determine the second display data based on the modification coefficient and the first display data;
the controller is used for determining a tristimulus value according to the color coordinates of the backlight light beam, and determining the correction coefficient based on the tristimulus value and the first display data so that the tristimulus value and the first display data meet a display standard condition; wherein the second display data is equal to a product of the first display data and the correction coefficient;
the backlight module is provided with a plurality of backlight components positioned in different areas; the backlight assembly corresponds to a plurality of display assemblies in the display module; the controller is configured to convert display data corresponding to a plurality of display elements of the backlight assembly from the first display data to the second display data if a target parameter of the backlight assembly satisfies the trigger condition; wherein if the target parameter of the backlight assembly does not satisfy the trigger condition, display data of a plurality of display assemblies corresponding to the backlight assembly is maintained at the first display data.
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| JP2009282187A (en) * | 2008-05-21 | 2009-12-03 | Renesas Technology Corp | Liquid crystal driving device |
| CN104793392B (en) * | 2015-04-24 | 2017-10-10 | 武汉华星光电技术有限公司 | Liquid crystal display panel and liquid crystal display |
| CN107705767B (en) * | 2017-10-27 | 2020-05-08 | 苏州佳世达电通有限公司 | Display device and color correction method |
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| CN110021256B (en) * | 2019-04-02 | 2021-11-23 | Oppo广东移动通信有限公司 | Display brightness adjusting method and related product |
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| JPH08292735A (en) * | 1994-12-16 | 1996-11-05 | Ricoh Co Ltd | Crossconversion system of light emission control signal for color display and tristimulus values of object color and crossconversion method |
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