CN111681602A - Display screen, optical filter and method for controlling light emission of display screen - Google Patents
Display screen, optical filter and method for controlling light emission of display screen Download PDFInfo
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- CN111681602A CN111681602A CN202010506467.9A CN202010506467A CN111681602A CN 111681602 A CN111681602 A CN 111681602A CN 202010506467 A CN202010506467 A CN 202010506467A CN 111681602 A CN111681602 A CN 111681602A
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
Abstract
The embodiment of the application provides a display screen, an optical filter and a method for controlling the light emission of the display screen, wherein the display screen comprises a control circuit, a switch circuit and the optical filter, and the optical filter comprises at least one target pixel unit; the target pixel unit includes at least one first light source device and at least one second light source device; the first light source device and the second light source device are homochromatic light source devices, and the light emitting wavelength of the first light source device is smaller than that of the second light source device; the switching circuit is electrically connected with the first light source device and the second light source device; the control circuit is configured to output a first electrical signal to the switch circuit, wherein the first electrical signal indicates a first light emitting mode; the switch circuit is used for controlling the second light source device to emit light in the first light emitting mode. The display screen of this scheme of adoption can reduce the damage of display screen to people's eye and guarantee that the colour of display screen shows undistorted.
Description
Technical Field
The embodiment of the application relates to the technical field of display, in particular to a display screen, an optical filter and a method for controlling the light emission of the display screen.
Background
The short-wave blue light has great harm to human body, and because the wavelength of the short-wave blue light is below 350 nanometers (nm), the wavelength of the short-wave blue light is short, and the energy is high. The display screen adopts the light source device of shortwave blue light, and when the display screen is in the dim light environment, the eyes of a person can enlarge the pupils due to the dim light environment when watching the display screen. Because the energy of the short-wave blue light is high, the short-wave blue light can penetrate through the crystalline lens of the eyeball, so that the damage to the macular part of the eyeground is caused. At present, the mobile phone generally has an anti-blue light mode, and the anti-blue light mode mostly adopts the mode of reducing blue light intensity to reduce the whole brightness of the display screen under the dark light environment, and simultaneously, the emission brightness of blue light is reduced through reducing the blue brightness proportion.
In the research and practice process of the prior art, the inventor of the embodiment of the application finds that although the damage of the short-wave blue light to human eyes can be reduced to a certain extent by reducing the brightness of the blue light, the effect of reducing the damage of the short-wave blue light to the human eyes is general, and the reduction of the light emitting ratio of the blue light can also cause the color of the display screen to have a larger deviation from the actual color, for example, cause the color of the display screen to be yellow. Therefore, the existing blue light resisting mode cannot effectively reduce the harm of short-wave blue light to people, and meanwhile, the color of the display screen is not influenced.
Disclosure of Invention
The embodiment of the application provides a display screen, an optical filter and a method for controlling the display screen to emit light, which can effectively reduce the damage of short-wave blue light to people and reduce the color distortion phenomenon of the display screen.
In a first aspect, an embodiment of the present application provides a display screen, where the display screen includes a control circuit, a switch circuit, and an optical filter, where the optical filter includes at least one target pixel unit;
wherein the target pixel unit includes at least one first light source device and at least one second light source device; the first light source device and the second light source device are homochromatic light source devices, and the light emitting wavelength of the first light source device is smaller than that of the second light source device; the switching circuit is electrically connected with the first light source device and the second light source device;
the control circuit is configured to output a first electrical signal to the switch circuit, wherein the first electrical signal indicates a first light emitting mode;
the switch circuit is used for controlling the second light source device to emit light in the first light emitting mode.
In one possible design, the control circuit is further configured to output a second electrical signal to the switching circuit, the second electrical signal indicating a second lighting mode;
the switch circuit is further configured to control the first light source device and the second light source device to emit light in the second light emitting mode.
In one possible design, the control circuit is further configured to, after the switching circuit controls the second light source device to emit light according to the first electrical signal input from the control circuit:
and performing color calibration on at least one target pixel unit where a second light source device in the optical filter is located according to a preset color calibration strategy.
In one possible design, the switching circuit includes a first switching circuit and a second switching circuit; the first switch circuit is electrically connected with the first light source device, and the second switch circuit is electrically connected with the second light source device;
the first switch circuit is configured to control light emission of the first light source device, and the second switch circuit is configured to control light emission of the second light source device.
In one possible design, the switching circuit is specifically configured to:
controlling the light emitting wavelength of the second light source device within a preset wavelength range according to the first electric signal so as to enable an area difference to be smaller than a preset area, wherein the area difference is a difference between the color gamut coverage area in the first light emitting mode and the color gamut coverage area in the second light emitting mode.
In one possible embodiment, at least one of the first light source devices is arranged adjacent to at least one of the second light source devices.
In a second aspect, an embodiment of the present application provides an optical filter, where the optical filter includes at least one target pixel unit;
wherein the target pixel unit includes at least one first light source device and at least one second light source device; the first light source device and the second light source device are homochromatic light source devices, and the light emitting wavelength of the first light source device is smaller than that of the second light source device.
In one possible embodiment, at least one of the first light source devices is arranged adjacent to at least one of the second light source devices.
In a third aspect, embodiments of the present application provide a method for controlling light emission of a display screen, where the method is applied to a display screen, and the display screen includes a control circuit, a switch circuit, and at least one target pixel unit; wherein the target pixel unit includes at least one first light source device and at least one second light source device; the first light source device and the second light source device are homochromatic light source devices, and the light emitting wavelength of the first light source device is smaller than that of the second light source device; the switching circuit is electrically connected with the first light source device and the second light source device; the method comprises the following steps:
the control circuit outputs a first electrical signal to the switch circuit, the first electrical signal indicating a first light emitting pattern;
the switch circuit controls the second light source device to emit light according to the first electric signal input from the control circuit.
In one possible design, the method further includes:
the control circuit outputs a second electrical signal to the switching circuit, the second electrical signal indicating a second lighting mode;
the switch circuit controls the second light source device to emit light according to the second electric signal input from the control circuit.
In one possible design, after the switching circuit controls the second light source device to emit light according to the first electrical signal input from the control circuit, the method further includes:
and performing color calibration on at least one target pixel unit where a second light source device in the optical filter is located according to a preset color calibration strategy.
In one possible design, the switching circuit controls the second light source device to emit light according to the first electric signal input from the control circuit, and includes:
the switch circuit controls the light emitting wavelength of the second light source device within a preset wavelength range according to the first electric signal so that an area difference is smaller than a preset area, and the area difference is a difference between a color gamut coverage area in the first light emitting mode and a color gamut coverage area in the second light emitting mode.
In one possible embodiment, at least one of the first light source devices is arranged adjacent to at least one of the second light source devices.
Yet another aspect of the embodiments of the present application provides a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform the method of the third aspect.
Compared with the prior art, in the scheme provided by the embodiment of the application, the target pixel unit is deployed in the optical filter, and the light source devices of a certain color in the target pixel unit are set as two separate materials, namely the first light source device and the second light source device, and the wavelength of the second light source device is long wavelength, so that in the eye protection mode, only the second light source device is started to emit light, on one hand, enough brightness can be provided for human eyes to watch the display screen, on the other hand, human eyes can adapt to working environments with various brightness, and the harm of short-wavelength colored light to human eyes cannot occur.
Drawings
FIG. 1 is a schematic structural diagram of a display screen in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of an optical filter according to an embodiment of the present disclosure;
FIG. 3a is a schematic diagram of a target pixel unit according to an embodiment of the present application;
FIG. 3b is a schematic diagram of a target pixel unit according to an embodiment of the present application;
FIG. 3c is a schematic diagram of a target pixel cell according to an embodiment of the present application;
FIG. 3d is a schematic diagram of a target pixel cell according to an embodiment of the present application;
FIG. 3e is a schematic diagram of a target pixel unit according to an embodiment of the present application;
FIG. 3f is a schematic diagram of a target pixel unit according to an embodiment of the present application;
FIG. 3g is a schematic diagram of a target pixel unit according to an embodiment of the present application;
FIG. 3h is a schematic diagram of a target pixel unit according to an embodiment of the present application;
FIG. 3i is a schematic diagram of a target pixel unit in the embodiment of the present application;
fig. 4 is a schematic diagram of color calibration in an eye-protecting mode according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of color calibration in the normal mode in the embodiment of the present application;
FIG. 6 is a schematic flow chart of color calibration in the embodiment of the present application;
FIG. 7 is a schematic diagram of a chromaticity diagram and a calibration color point position according to an embodiment of the present application;
FIG. 8 is a schematic diagram of a switch circuit according to an embodiment of the present application;
FIG. 9 is a flowchart illustrating a method for controlling light emission of a display panel according to an embodiment of the present application;
FIG. 10 is a graph showing blue light hazard curves for different wavelengths in an embodiment of the present application;
fig. 11 is a color gamut diagram in an embodiment of the present application;
fig. 12 is a comparison diagram of relative values of radiance SR corresponding to blue spectrum in normal mode and eye protection mode in the embodiment of the present application.
Detailed Description
The terms "first," "second," and the like in the description and in the claims of the embodiments of the application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprise" and "have," and any variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or modules is not necessarily limited to those steps or modules expressly listed, but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus, such that the division of modules presented in the present application is merely a logical division and may be implemented in a practical application in a different manner, such that multiple modules may be combined or integrated into another system or some features may be omitted or not implemented, and such that couplings or direct couplings or communicative connections shown or discussed may be through interfaces, indirect couplings or communicative connections between modules may be electrical or the like, the embodiments of the present application are not limited. Moreover, the modules or sub-modules described as separate components may or may not be physically separated, may or may not be physical modules, or may be distributed in a plurality of circuit modules, and some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiments of the present application.
The embodiment of the application provides a display screen, an optical filter and a method for controlling the light emission of the display screen, and the scheme can be used for equipment with the display screen or in communication connection with the display equipment.
The embodiment of the application mainly provides the following technical scheme:
1. the blue light sub-pixels in the optical filter are divided into two types of sub-pixels, the two types of sub-pixels have different blue light wavelengths, and the first type of sub-pixels have common blue light wavelengths, namely comprise short-wave blue light and long-wave blue light at the same time. The second type of sub-pixel does not comprise short-wave blue light. The two types of sub-pixels are respectively controlled to be switched on and off by independent control circuits, and can be switched according to different working modes, for example, the first type of sub-pixels and the second type of sub-pixels are simultaneously switched on in a normal illumination mode. In a weak illumination mode, for example in an eye protection mode, only the second type of sub-pixels are turned on.
2. And in the eye protection mode, only the second type of sub-pixels are started, and color calibration is carried out according to the second type of sub-pixels in a single-started state.
Referring to fig. 1, a display panel provided in an embodiment of the present application is described below, where the display panel includes a control circuit 1, a switch circuit 2, and an optical filter 3, where the optical filter 3 includes at least one target pixel unit 30;
wherein the target pixel unit 30 includes at least one first light source device 301 and at least one second light source device 302; the first light source device 301 and the second light source device 302 are homochromatic light source devices, and the light emitting wavelength of the first light source device 301 is smaller than the light emitting wavelength of the second light source device 302; the switch circuit 2 is electrically connected to the first light source device 301 and the second light source device 302;
the control circuit 1 is configured to output a first electrical signal to the switch circuit 2, where the first electrical signal indicates a first light emitting mode;
the switch circuit 2 is configured to control the second light source device 302 to emit light in the first light emitting mode.
In some embodiments, the control circuit 1 is further configured to output a second electrical signal to the switch circuit 2, the second electrical signal indicating a second lighting mode;
the switch circuit 2 is further configured to control the first light source device 301 and the second light source device 302 to emit light in the second light emitting mode.
As can be seen, since the light emitting wavelength of the first light source device 301 is much smaller than the light emitting wavelength of the second light source device 302, in the normal mode, the first light source device 301 and the second light source device 302 are turned on to emit light at the same time, so that the light of the same color emitted by the first light source device 301 and the second light source device 302 is displayed normally when being displayed on the display screen.
In some embodiments, the display screen may include at least one filter 3, and the number of filters 3 and the relative spatial positions between two or more filters 3 are not limited in the examples of the present application. In addition, the position, number, shape, size, etc. of the target pixel unit 30 in the filter 3 are not limited in the embodiment of the present application.
In other embodiments, the switch circuit 2 may be integrated in the control circuit 1, which is not limited in the embodiments of the present application.
Compared with the prior art, in the embodiment of the present application, the target pixel unit 30 is disposed in the optical filter 3, and since the light source devices of a certain color in the target pixel unit 30 are provided as two separate materials, i.e., the first light source device 301 and the second light source device 302, and the wavelength of the second light source device 302 is a long wavelength (e.g., 450nm), in the eye protection mode, only the second light source device 302 is turned on to emit light, on one hand, sufficient brightness can be provided for human eyes to watch the display screen, on the other hand, human eyes can adapt to working environments with various brightness, and the harm of short-wavelength colored light to human eyes does not occur.
Optionally, in some embodiments of the present application, at least one of the first light source devices 301 is disposed adjacent to at least one of the second light source devices 302.
It can be seen that the actual color requirement is ensured by the relative position, number, of the first light source device 301 and the second light source device 302 disposed for the target pixel unit 30. Specifically, the pixel units to be specially or mainly focused on in the display screen can be determined according to business requirements, and then the target pixel unit 30 is correspondingly set according to the business requirements, so that the display problem caused by uniform adjustment of all the pixel units in the optical filter can be avoided, and the display device is more practical and has no requirement.
For example, fig. 2 shows a schematic structure of the optical filter, in fig. 2, the target pixel unit is a blue light emitting pixel unit, the first light source device 301 is B1, and the second light source device 302 is B2. B1 and B2 are uniformly distributed.
For example, as shown in fig. 3a, B between G and G is replaced by a first light source device 301 and a second light source device 302, and the first light source device 301 and the second light source device 302 are adjacent and 1 respectively. For example, as shown in fig. 3B, B between G and G is replaced by a first light source device 301 and a second light source device 302, and the first light source device 301 is adjacent to 1 of the second light source devices 302, the first light source device 301 is 1, and the second light source device 302 is 2. And the analogy between fig. 3c and fig. 3i is omitted for brevity. The size, number, shape, and relative positional relationship between the first light source device 301 and the second light source device 302 are not limited in the embodiments of the present application.
In some embodiments, in one target pixel unit 30, the area ratio of the first light source device 301 to the second light source device 302 is within a preset range, which can ensure that the normal display of the target pixel unit is not affected after the dynamic switching to the first light emitting mode.
Alternatively, in some embodiments of the present application, in the prior art, the pixels participating in light emission are fixed, and only one color calibration mode is used, and when color calibration is completed, color distortion is caused by changing the proportion of blue light. Therefore, to solve the color distortion problem, in the embodiment of the present application, when the display screen is in the low-brightness mode and the second light source device 302 is separately turned on, the color calibration may be performed on the optical filter 3, that is, the color calibration is performed on at least one target pixel unit 30 (i.e., a part or all of the target pixel unit 30), so that the color of the display area where the target pixel unit 30 is located is prevented from becoming yellow. Specifically, the control circuit 1 is further configured to, after the switch circuit 2 controls the second light source device 302 to emit light according to the first electric signal input from the control circuit 1:
and performing color calibration on at least one target pixel unit 30 where the second light source device 302 in the optical filter is located according to a preset color calibration strategy.
It can be seen that, when the second light source device 302 is separately turned on in the low-brightness mode of the display screen, the color of the display area where the target pixel unit 30 is located can be prevented from becoming yellow by performing color calibration on at least one target pixel unit 30 (i.e., part or all of the target pixel units) in the optical filter 3.
Fig. 4 is a schematic diagram of color calibration in an eye-protecting mode. In eye-protecting mode, B1 is off and B2 is on. The optical sensor collects display information of the display screen, color calibration operation is carried out on the display result to obtain a calibration result, the calibration result is judged according to input calibration color point information, and the display information is output to the optical filter 3 according to the judgment result. The filter 3 includes a display row driving circuit and a display column driving circuit.
In the embodiment of the present application, the color calibration of at least one pixel unit 30 in the filter 3 may also be performed in the first light emitting mode, i.e., the normal mode. As shown in fig. 5, in the normal mode, both B1 and B2 are turned on. The optical sensor collects display information of the display screen, color calibration operation is carried out on the display result to obtain a calibration result, the calibration result is judged according to input calibration color point information, and the display information is output to the optical filter 3 according to the judgment result.
The color calibration process (applicable to the color calibration process in the embodiments shown in fig. 8 and 9) is described in detail below. As shown in FIG. 6, color calibration point information (R) is inputin，Gin，Binγ) color calibration point information (R) based on a color calibration standardin，Gin，BinY) into x, Y color space coordinates, e.g. color calibration point information (R) according to the sRGB IEC 1966-2.1 standardin，Gin，BinY) to x, Y color space coordinates, i.e. to obtain target color space coordinates (x)aim，yaim，Yaim，γ)。
From the target color space coordinates (x)aim，yaim，YaimAnd gamma) display the corresponding color. The optical sensor obtains an image to be displayed on the display screen, and analyzes x, Y and Y color space coordinates corresponding to the color actually displayed on the current display screen, namely the actual color space coordinates (x)actual，yactual，Yactualγ). And comparing the target color space coordinate with the actual color space coordinate, respectively calculating the differences of brightness, saturation and hue, and finally calculating the total color difference delta E. A CIE xyY chromaticity diagram as shown in FIG. 7Schematic of calibration color point locations (e.g., locations T1-T7).
And if the delta E is less than 1, calculating a compensation matrix according to the compensation value, calibrating the color according to the compensation matrix and recording the calibrated parameters. In some embodiments, one way of representing the compensation matrix (which is only an example, and is not limited by the examples of the present application) is as follows:
the following is a conversion matrix of color input and output and a calculation method for calibration based on the compensation matrix in the color calibration process, specifically as follows:
Rout＝a11*Rin+a21*Gin+a31*Bin(formula 2)
Gout＝a12*Rin+a22*Gin+a32*Bin(formula 3)
Bout＝a13*Rin+a23*Gin+a33*Bin(formula 4)
If Δ E is greater than 1, the adjusted color space coordinates (x) are obtainedadjust，yadjust，Yadjustγ) and then based on the adjusted color space coordinates (x)adjust，Yadjust，YadjustAnd gamma) for color display.
It should be noted that, in the embodiment of the present application, since the pixels participating in light emission in the normal operation mode and the eye protection mode are different, calibration needs to be performed respectively during color calibration, and then the calibration parameters (conversion matrices) need to be stored respectively. The more the number of color samples participating in calibration is, the more vivid the calibrated screen color is, the longer the calibration time is, and a color point, such as a position, is selected in a standard color space in consideration of the production cost of the display screenFor the color point of T1, the RGB input value corresponding to T1 is (R)in，Gin，Bin) And comparing the actually displayed color with the standard color to calculate whether the total color difference delta E meets the preset color standard. For example, when Δ E < 1, if Δ E does not satisfy the predetermined color standard, the RGB input values may be adjusted continuously until the total color difference Δ E between the finally displayed color and the standard color satisfies the predetermined color standard. When the delta E meets the preset color standard, the display data correspondingly transmitted to the display screen is (R)out,Gout,Bout) The conversion relationship between the two is as shown in the above equation 1. Accordingly, the corresponding transformation matrix for the calibration sample color point T1 is recorded.
In addition, the color points (i.e. the pixel points displaying colors) of different calibration samples correspond to different conversion matrices, and since there are countless color points of the samples, in order to improve the calibration efficiency and ensure the calibration effect, the key pixel points (the color points on the RGB of the single tone) can be selected without calibrating all the sample color points one by one, and the other color points can be indirectly approximated by a certain interpolation algorithm to obtain the corresponding conversion matrices.
It can be seen that, in the embodiment of the present application, since the color calibration is performed in both the first light emitting mode and the second light emitting mode, there is no large color distortion when the respective light emitting modes are operated independently.
Optionally, in some embodiments of the present application, the switch circuit 2 is specifically configured to:
controlling the light emitting wavelength of the second light source device 302 within a preset wavelength range according to the first electrical signal, so that an area difference is smaller than a preset area, where the area difference is a difference between a color gamut coverage area in the first light emitting mode and a color gamut coverage area in the second light emitting mode.
It can be seen that, under different ambient brightness, the color gamut coverage area of the target pixel unit 30 is adjusted to follow the wavelength change of the colored light emitted by the light source device in the target pixel unit 30, so that when the light emitting mode of the target pixel unit 30 is switched due to the ambient brightness change, the change value of the actual color display coverage area of the target pixel unit 30 is within the preset range, that is, the change is very small, so for human eyes, no obvious color gamut area difference occurs, and smooth switching is ensured, so that the user does not perceive any color.
Optionally, in some embodiments of the present application, the switch circuit 2 includes a first switch circuit and a second switch circuit; the first switch circuit is electrically connected to the first light source device 301, and the second switch circuit is electrically connected to the second light source device 302.
Wherein the first switching circuit is configured to control light emission of the first light source device 301, and the second switching circuit is configured to control light emission of the second light source device 302.
As can be seen, by providing the independent switch circuits 2 to respectively control the light emission of the first light source device 301 and the second light source device 302, it is convenient to independently control the light emission of the light source devices when the display screen switches the light emission mode due to environmental factors, so that the display screen can dynamically switch the wavelengths of the colored lights emitted by the first light source device 301 and the second light source device 302 in the target pixel unit 20 according to the ambient brightness.
In some embodiments, a switch circuit 2 as shown in fig. 8 may be used, and the switch circuit 2 may be used to control on and off of the pixels in the first light source device 301 and the second light source device 302 in the optical filter 3. The following describes the principle of the switch circuit 2 controlling the on and off of the pixel points in the first light source device 301 and the second light source device 302:
the switch circuit 2 includes transistors T1, T2, and a storage capacitor Cs. Each of the pixels in the first and second light source devices 301 and 302 has a transistor, for example, a gate of the transistor T1 is connected to the scan line Vsel, a drain of the transistor T1 is connected to the data line Vdata, and a source of the transistor T1 is connected to the pixel electrode. The gate of the transistor T2 is connected to the source of T1, and the drain of T2 is connected to the pixel OLED.
Taking one frame period as an example, controlling the pixel OLED in a constant current to control the color display of the pixel OLED is described. When the scan line (Vsel) is selected, i.e. a sufficient voltage is applied to the Vsel, the transistor T1 on the Vsel is turned on, and the pixel electrode is electrically connected to the data line to write the color display signal voltage on the data line into the pixel OLED (e.g. the sub-pixel B1 or B2) so as to control the color display of the pixel OLED. The data voltage Vdata charges Cs through the T1 transistor, and the voltage of Cs controls the current between the drain Vdd of T2 and the source Vss of T2.
When the scan line Vsel is not selected, T1 is turned off, the gate voltage of T2 is continuously maintained by the charges stored in Cs, and T2 remains in the on state, so that the pixel OLED is in the constant current control during the whole frame period.
It can be seen that since the sub-pixels B1 and B2 are provided with separate Vsel control signals, the turning on and off of B1 and B2 can be controlled separately.
The embodiment of the present application further provides an optical filter 3, where the optical filter 3 includes at least one target pixel unit 30; wherein the target pixel unit 30 includes at least one first light source device 301 and at least one second light source device 302; the first light source device 301 and the second light source device 302 are same-color light source devices, and the light emitting wavelength of the first light source device 301 is smaller than the light emitting wavelength of the second light source device 302.
In some embodiments, at least one of the first light source devices 301 is disposed adjacent to at least one of the second light source devices 302.
The structure of the filter 3 can refer to a structure shown in fig. 2, and the structure of the target pixel unit 30 in the filter 3 can refer to a schematic diagram shown in any one of fig. 2 to 3 i.
The filter 3 may be used for a display screen, or may be used alone, and the embodiment of the present application is not limited thereto. By implanting the optical filter 3 into the display screen, the color display of the display screen can be controlled according to business requirements, and the switching of diversified and various light-emitting modes is realized.
Any technical feature mentioned in the embodiment corresponding to any one of fig. 1 to 8 is also applicable to the embodiment corresponding to fig. 9 to 12 in the embodiment of the present application, and the details of the subsequent similarities are not repeated. The embodiment of the present application further provides a method for controlling light emission of a display screen, as shown in fig. 9, the method is applied to a display screen, where the display screen includes a control circuit, a switch circuit, and at least one target pixel unit; wherein the target pixel unit includes at least one first light source device and at least one second light source device; the first light source device and the second light source device are homochromatic light source devices, and the light emitting wavelength of the first light source device is smaller than that of the second light source device; the switching circuit is electrically connected with the first light source device and the second light source device; the method comprises the following steps:
the control circuit outputs a first electrical signal to the switch circuit, the first electrical signal indicating a first light emitting pattern;
the switch circuit controls the second light source device to emit light according to the first electric signal input from the control circuit.
In some embodiments, the method further comprises:
the control circuit outputs a second electrical signal to the switching circuit, the second electrical signal indicating a second lighting mode;
the switch circuit controls the second light source device to emit light according to the second electric signal input from the control circuit.
In some embodiments, after the switching circuit controls the second light source device to emit light according to the first electric signal input from the control circuit, the method further includes:
and performing color calibration on at least one target pixel unit where a second light source device in the optical filter is located according to a preset color calibration strategy.
In some embodiments, the switching circuit controls the second light source device to emit light according to the first electric signal input from the control circuit, including:
the switch circuit controls the light emitting wavelength of the second light source device within a preset wavelength range according to the first electric signal so that an area difference is smaller than a preset area, and the area difference is a difference between a color gamut coverage area in the first light emitting mode and a color gamut coverage area in the second light emitting mode.
In some embodiments, at least one of the first light source devices is disposed adjacent to at least one of the second light source devices.
For example, for convenience of understanding, the method for controlling the display panel to emit light according to the embodiment of the present application is described below by taking the example of controlling the blue light emitting device to emit blue light. A blue hazard curve for a different wavelength as shown in fig. 10. The blue light hazard refers to the hazard caused by short-wave blue light (wavelength 315 nm-350 nm), the wavelength of the blue light is about 350nm, the blue light is close to ultraviolet light, the wavelength is shortest, the energy is highest, and the damage to eyes is greatest. The embodiment of the application adopts two types of B sub-pixels: b1 and B2, wherein B1 comprises the same material with the same wavelength as B used in the conventional GBGR division, and has better color gamut. B1 is a generally normal blue material, i.e., the emitted blue light is broader in spectrum, including short and long wavelength ranges. The blue spectrum of the light emitted by the B2 light is distributed in a range close to 350nm and not less than 350 nm. And B1 and B2, respectively. The B1 and the B2 are made of different materials, the light emitting wavelengths of the B1 and the B2 are different, and the two sub-pixels of the B1 and the B2 can be independently controlled to be switched on and switched off.
In the color gamut diagram shown in fig. 11, the triangle RGB1 is a normal color gamut coverage area, and in the prior art, the method of reducing the screen brightness is adopted, and B1 is moved to B3, which results in a larger reduction of the color gamut coverage area, and the blue color is shifted to the yellow direction, which results in a yellow color bias. If the display screen of the embodiment of the present application continues to use the method of reducing the screen brightness in the prior art, the color gamut coverage areas in the normal mode RG (B1+ B2) and the eye protection mode RGB2 do not change much from the conventional RGB 1.
The display screen based on this application embodiment analyzes and knows, when the wavelength moves to 385nm department, the colour gamut area of coverage can reduce a bit, but the nearly totally stopped short wave blue light injury of colour, the degree of accuracy can not change too greatly, can not cause the deviation distortion through appropriate colour calibration, and traditional method conversion blue account for of representing transfers than the low, can lead to the screen to be yellow partially, the colour distortion.
Therefore, in the embodiment of the present application, when the display screen is used in a normal luminance environment, B1 and B2 are simultaneously lit, and the color calibration simultaneously adopts the state when B1 and B2 are simultaneously turned on. When the color correction device is used in a dark environment, the eye protection film is started, and sufficient brightness can be provided only by turning on the B2 pixels alone, because in the dark environment, the screen brightness does not need to be too high and only needs to be a little higher than the ambient brightness, and the color correction criterion at the moment is calibrated according to the state when the B2 is turned on alone.
When the eye protection mode needs to be entered, B1 is closed, B2 is opened, and if the eye protection mode is entered, B1 and B2 are simultaneously opened, as shown in the following table 1:
| sub-pixel | Normal mode | Eye protection mode |
| B1 | Is opened | Close off |
| B2 | Is opened | Is opened |
TABLE 1
In addition, in the eye protection mode, the color calibration is calibrated according to the state of B2 when B2 is opened alone, so that the aims of completely protecting eyes and avoiding yellow color deviation can be achieved.
Fig. 12 is a diagram showing a comparison of relative values of the radiance SR corresponding to the blue spectrum in the normal mode and the eye protection mode. Through the contrast, under the eyeshield mode, because only B2 has been opened, consequently, can effectively reduce the radiance SR relative value that the blue light frequency spectrum corresponds, and then effectively stop the injury of shortwave blue light to people's eye under the eyeshield mode. .
It can be seen that a traditional B sub-pixel is divided into two sub-pixels, the two sub-pixels have different blue light wavelengths, the two sub-pixels are independently controlled to be switched on and off, the wavelengths of the blue light pixels can be switched according to different working modes, the blue light pixels can be switched between a normal working mode and an eye protection mode in a high-brightness environment or a dark environment, and the eye protection mode simultaneously considers lower color distortion and almost 100% short-wave blue light inhibition.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the module described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the embodiments of the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is merely a logical division, and in actual implementation, there may be other divisions, for example, multiple modules or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may be stored in a computer readable storage medium.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.
The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the present application are generated in whole or in part when the computer program is loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
The technical solutions provided by the embodiments of the present application are introduced in detail, and the principles and implementations of the embodiments of the present application are explained by applying specific examples in the embodiments of the present application, and the descriptions of the embodiments are only used to help understanding the method and core ideas of the embodiments of the present application; meanwhile, for a person skilled in the art, according to the idea of the embodiment of the present application, there may be a change in the specific implementation and application scope, and in summary, the content of the present specification should not be construed as a limitation to the embodiment of the present application.
Claims (14)
1. A display screen is characterized by comprising a control circuit, a switch circuit and an optical filter, wherein the optical filter comprises at least one target pixel unit;
wherein the target pixel unit includes at least one first light source device and at least one second light source device; the first light source device and the second light source device are homochromatic light source devices, and the light emitting wavelength of the first light source device is smaller than that of the second light source device; the switching circuit is electrically connected with the first light source device and the second light source device;
the control circuit is configured to output a first electrical signal to the switch circuit, wherein the first electrical signal indicates a first light emitting mode;
the switch circuit is used for controlling the second light source device to emit light in the first light emitting mode.
2. The display screen of claim 1, wherein the control circuit is further configured to output a second electrical signal to the switch circuit, the second electrical signal indicating a second lighting mode;
the switch circuit is further configured to control the first light source device and the second light source device to emit light in the second light emitting mode.
3. The display screen according to claim 1 or 2, wherein the control circuit, after the switch circuit controls the second light source device to emit light according to the first electric signal input from the control circuit, is further configured to:
and performing color calibration on at least one target pixel unit where a second light source device in the optical filter is located according to a preset color calibration strategy.
4. The display screen of claim 3, wherein the switching circuit comprises a first switching circuit and a second switching circuit; the first switch circuit is electrically connected with the first light source device, and the second switch circuit is electrically connected with the second light source device;
the first switch circuit is configured to control light emission of the first light source device, and the second switch circuit is configured to control light emission of the second light source device.
5. The display screen of claim 4, wherein the switch circuit is specifically configured to:
controlling the light emitting wavelength of the second light source device within a preset wavelength range according to the first electric signal so as to enable an area difference to be smaller than a preset area, wherein the area difference is a difference between the color gamut coverage area in the first light emitting mode and the color gamut coverage area in the second light emitting mode.
6. A display screen in accordance with claim 1, wherein at least one of the first light source devices is disposed adjacent at least one of the second light source devices.
7. An optical filter, characterized in that the optical filter comprises at least one target pixel unit;
wherein the target pixel unit includes at least one first light source device and at least one second light source device; the first light source device and the second light source device are homochromatic light source devices, and the light emitting wavelength of the first light source device is smaller than that of the second light source device.
8. The filter of claim 7, wherein at least one of the first light source devices is disposed adjacent to at least one of the second light source devices.
9. A method for controlling the light emission of a display screen is characterized in that the method is applied to the display screen, and the display screen comprises a control circuit, a switch circuit and at least one target pixel unit; wherein the target pixel unit includes at least one first light source device and at least one second light source device; the first light source device and the second light source device are homochromatic light source devices, and the light emitting wavelength of the first light source device is smaller than that of the second light source device; the switching circuit is electrically connected with the first light source device and the second light source device; the method comprises the following steps:
the control circuit outputs a first electrical signal to the switch circuit, the first electrical signal indicating a first light emitting pattern;
the switch circuit controls the second light source device to emit light according to the first electric signal input from the control circuit.
10. The method of claim 9, further comprising:
the control circuit outputs a second electrical signal to the switching circuit, the second electrical signal indicating a second lighting mode;
the switch circuit controls the second light source device to emit light according to the second electric signal input from the control circuit.
11. The method according to claim 9 or 10, wherein after the switching circuit controls the second light source device to emit light according to the first electric signal input from the control circuit, the method further comprises:
and performing color calibration on at least one target pixel unit where a second light source device in the optical filter is located according to a preset color calibration strategy.
12. The method according to claim 1, wherein the switching circuit controls the second light source device to emit light according to the first electric signal input from the control circuit, including:
the switch circuit controls the light emitting wavelength of the second light source device within a preset wavelength range according to the first electric signal so that an area difference is smaller than a preset area, and the area difference is a difference between a color gamut coverage area in the first light emitting mode and a color gamut coverage area in the second light emitting mode.
13. The method of claim 1, wherein at least one of the first light source devices is disposed adjacent to at least one of the second light source devices.
14. A computer-readable storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 9-13.
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