Display panel, driving method thereof and display device

Abstract

The embodiment of the invention discloses a display panel, a driving method thereof and a display device. In one specific implementation mode, the display panel comprises pixel units arranged in an array mode, each pixel unit comprises a plurality of sub-pixels, the sub-pixels comprise at least one first sub-pixel emitting first color light and at least one second sub-pixel emitting second color light, the first color light is red light, the second color light is different from the first color light, the first color light is red light, and the second color light is red light. The display panel is configured in the mode that when the brightness of the environment where the display panel is located is larger than or equal to a preset threshold value, in the lightened pixel units, one first sub-pixel and other sub-pixels except the first sub-pixel emit light, and when the brightness of the environment where the display panel is located is smaller than the preset threshold value, in the lightened pixel units, the other sub-pixels except the first sub-pixel emit light. Only at least one first sub-pixel emits light. According to the embodiment, the two requirements for high visibility in a bright environment and visibility and safety in a dark environment can be met at the same time.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and more specifically, to a display panel and a driving method thereof, and a display device. Background Art

[0002] There are two types of visual cells on the retina: cones and rods. Rods are used to sense the intensity of light and work mainly in dark environments, while cones work in bright environments. When the light is very strong, rods cannot see dark areas, and it takes a certain amount of time for rods to recover. When entering a shadow from a bright environment, the human eye will not be able to see clearly for a certain period of time. Therefore, in a dark environment, when using display products and switching between night vision, there are safety risks. Summary of the invention

[0003] An object of the present disclosure is to provide a display panel and a driving method thereof, and a display device to solve at least one of the problems existing in the prior art.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] A first aspect of the present disclosure provides a display panel, comprising: a pixel unit arranged in an array, the pixel unit comprising: a plurality of sub-pixels, the plurality of sub-pixels comprising at least one first sub-pixel emitting a first color light and at least one second sub-pixel emitting a second color light, the first color light being red light, the second color light being different from the first color light,

[0006] The display panel is configured such that, when the ambient brightness of the display panel is greater than or equal to a preset threshold, in a lit pixel unit, at least one first sub-pixel and other sub-pixels except the first sub-pixel emit light, and when the ambient brightness of the display panel is less than the preset threshold, in a lit pixel unit, only at least one first sub-pixel emits light.

[0007] Optionally, the pixel unit includes at least two first sub-pixels, and the pixel unit includes a first pixel unit and a second pixel unit, wherein:

[0008] The first pixel unit includes at least a first sub-pixel and a second sub-pixel, and the second pixel unit is composed of the first sub-pixels except the sub-pixels in the first pixel unit.

[0009] The display panel is configured such that when the ambient brightness of the display panel is greater than or equal to a preset threshold, only the first pixel unit among the lit pixel units emits light, and when the ambient brightness of the display panel is less than the preset threshold, only the first sub-pixel among the lit pixel units emits light.

[0010] Optionally, the first pixel unit includes: a first sub-pixel, a second sub-pixel and a third sub-pixel, the second sub-pixel emits green light, the third sub-pixel emits blue light, and the second pixel unit includes a first sub-pixel.

[0011] Optionally, the display panel includes: a first pixel column and a second pixel column arranged at intervals, the first sub-pixel and the second sub-pixel in the first pixel unit are located in the first pixel column and arranged at intervals, the third sub-pixel is located in the second pixel column,

[0012] The first sub-pixels in two adjacent second pixel units are integrally arranged and arranged between two third sub-pixels in the second pixel column.

[0013] Optionally, the first sub-pixel, the second sub-pixel, the third sub-pixel of the first pixel unit and the first sub-pixel in the second pixel unit are arranged in a quadrilateral in a cross section parallel to the light emitting surface of the display panel.

[0014] Optionally, a ratio of a projection area of ​​the first sub-pixel in the second pixel unit on the light emitting surface of the display panel to a projection area of ​​the first sub-pixel in the first pixel unit on the light emitting surface of the display panel is greater than or equal to 0.5 and less than or equal to 2.

[0015] Optionally, a distance between the first sub-pixel and an adjacent sub-pixel in the second pixel unit is greater than or equal to 10 μm.

[0016] Optionally, the shape of the sub-pixel is one of a circle, a rectangle, a rhombus and a diamond.

[0017] Optionally, the preset threshold is a brightness critical value at which the human eye switches from viewing objects using rod cells to viewing objects using cone cells.

[0018] Optionally, the display panel further includes: a sensor disposed in a non-display area of ​​the display panel, the sensor sensing the brightness of an environment in which the display panel is located.

[0019] A second aspect of the present disclosure provides a display device, comprising: the display panel described above.

[0020] A third aspect of the present disclosure provides a method for driving the display panel as described above.

[0021] When the received ambient brightness of the display panel is greater than or equal to a preset threshold, in the lit pixel unit, at least one first sub-pixel and other sub-pixels except the first sub-pixel emit light, and when the received ambient brightness of the display panel is less than the preset threshold, in the lit pixel unit, only at least one first sub-pixel emits light.

[0022] The beneficial effects of the present disclosure are as follows:

[0023] In response to the existing problems, the present disclosure develops a display panel and a driving method thereof, as well as a display device. The display panel is configured to simultaneously emit red light and light of a color different from red light when the ambient light is greater than or equal to a preset threshold, and only emit red light when the ambient light is less than the preset threshold. Thus, the display panel can simultaneously meet the two requirements of strong visibility in a bright environment and visibility and safety in a dark environment. The display panel can simultaneously meet the two requirements of strong visibility in a bright environment and visibility and safety in a dark environment, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The specific implementation methods of the present disclosure are further described in detail below with reference to the accompanying drawings.

[0025] Figure 1 The perception spectrum of cones and rods is shown;

[0026] Figure 2 A schematic diagram showing a display panel according to an embodiment of the present disclosure;

[0027] Figure 3 A schematic diagram showing a display panel according to another embodiment of the present disclosure;

[0028] Figure 4 A schematic flowchart of a method for driving a display panel according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0029] The terms “on”, “formed on” and “disposed on” in the present disclosure may mean that one layer is directly formed or disposed on another layer, or may mean that one layer is indirectly formed or disposed on another layer, i.e., there are other layers between the two layers.

[0030] It should be noted that, although the terms "first", "second", etc. may be used herein to describe various parts, components, elements, regions, layers and / or parts, these parts, components, elements, regions, layers and / or parts should not be limited by these terms. Instead, these terms are used to distinguish one part, component, element, region, layer and / or part from another. Thus, for example, the first part, first member, first element, first region, first layer and / or first part discussed below may be referred to as the second part, second member, second element, second region, second layer and / or second part without departing from the teachings of the present disclosure.

[0031] In the present disclosure, unless otherwise specified, the term "same-layer arrangement" used refers to two layers, parts, components, elements or parts that can be formed by the same preparation process (such as a patterning process, etc.), and the two layers, parts, components, elements or parts are generally formed of the same material. For example, two or more functional layers are arranged in the same layer, which means that these functional layers arranged in the same layer can be formed using the same material layer and the same preparation process, thereby simplifying the preparation process of the display substrate.

[0032] There are two types of visual cells on the retina: cones and rods. Rods are responsible for sensing the intensity of light and mainly work in dark environments. They cannot distinguish colors, which means that human vision can only see grayscale in dark environments. In bright environments, the sensitivity of rods will tend to saturate as the brightness of light increases. When the brightness is less than 0.01cd / m 2 When the light is off, the cones lose their activity and the rods are completely sensitive to light. The vision at this time is called dark vision or dark-adapted vision. The sensitivity curve of rods to different wavelengths of light in a dark environment is called the dark vision curve. The peak of the dark vision spectrum is at 490nm to 507nm (cyan). Cones work in bright environments and can perceive brightness and color. There are three types of cones, which are used to perceive blue light, green light, and red light. Figure 1 The perception spectrum of cones and rods is shown.

[0033] When the light is very strong, the rod cells are saturated and the eyes cannot see dark areas. It takes a certain amount of time for the rod cells to recover, so when entering the shadow from a bright environment, the human eye will not be able to see things clearly for a certain period of time. Therefore, when people drive a car or other means of transportation at night, after looking at the dashboard display and then looking at the road outside the screen, there will be a safety risk that the human eye will not be able to see things clearly due to the time it takes for the rod cells to recover.

[0034] In view of this, an embodiment of the present disclosure provides a display panel, including: a pixel unit arranged in an array, the pixel unit including: a plurality of sub-pixels, the plurality of sub-pixels including at least one first sub-pixel emitting a first color light and at least one second sub-pixel emitting a second color light, the first color light is red light, the second color light is different from the first color light,

[0035] The display panel is configured such that, when the ambient brightness of the display panel is greater than or equal to a preset threshold, in a lit pixel unit, at least one first sub-pixel and other sub-pixels except the first sub-pixel emit light, and when the ambient brightness of the display panel is less than the preset threshold, in a lit pixel unit, only at least one first sub-pixel emits light.

[0036] In this embodiment, the display panel is configured to simultaneously emit red light and light of a color different from red light when the ambient light is greater than or equal to a preset threshold, and only emit red light when the ambient light is less than the preset threshold. This can simultaneously meet the two requirements of strong visibility in a bright environment and visibility and safety in a dark environment.

[0037] In a specific example, refer to Figure 2 As shown, the display panel includes a plurality of sub-pixels, and the plurality of sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel. The first sub-pixel emits a first color light, the second sub-pixel emits a second color light, and the third sub-pixel emits a third color light, wherein the first color light is red light. In this example, the second color light is green light, and the third color light is blue light.

[0038] In the embodiments of the present disclosure, the display panel may be a light emitting diode (LED) display panel, an organic light emitting diode (OLED) display panel, a quantum dot light emitting diode (QLED) display panel, a micro light emitting diode (Micro LED) display panel, etc. Any display panel may be used as long as it can realize independent pixel-by-region control of pixel lighting and extinguishing at the pixel level.

[0039] In particular, continue to refer to Figure 2 In the example shown, the display panel includes a plurality of pixel units, each pixel unit includes at least two first sub-pixels R1 and R2, that is, two red sub-pixels, and in addition, the pixel unit also includes: a second sub-pixel G and a third sub-pixel B. The pixel unit includes a first pixel unit 10 and a second pixel unit 20.

[0040] In an embodiment of the present disclosure, the display panel is configured such that, when the ambient brightness of the display panel is greater than or equal to a preset threshold, in a lit pixel unit, at least one first sub-pixel R1 and other sub-pixels except the first sub-pixel R1 emit light, and when the ambient brightness of the display panel is less than the preset threshold, in a lit pixel unit, only at least one first sub-pixel R1 emits light.

[0041] Specifically, assuming that the application scenario of the display panel is a car dashboard, when the display panel displays the status of various instruments of the car, only the pixel units related to the instrument status, such as the dashboard shape, pointer position, and numbers, are lit, and the pixel units at other positions are off.

[0042] Specifically in this example, when the ambient brightness of the display panel is greater than or equal to a preset threshold, it means that the display panel is in a bright environment, then the first pixel unit 10 emits light, that is, the first sub-pixel R1, the second sub-pixel G and the third sub-pixel B in the pixel unit are lit, so that the cone cells can perceive red light, green light and red light, and thus feel the white instrument panel outline, pointers and numbers, etc.; when the ambient brightness of the display panel is less than the preset threshold, it means that the display panel is in a dark environment (or shadow environment), then only the red first sub-pixels R1 and R2 are lit, and the sub-pixels emitting other colors of light are in an off state, so that in a background environment with low light intensity, the cone cells can perceive the ... The selective stimulation of cones with red light enables the human eye to normally recognize the dashboard in a dark environment. At the same time, the rod cells are not easily stimulated by red wavelength light waves (i.e., they are insensitive to red light), thereby isolating the rod cells and preventing them from failing. As a result, when a person looks at the dashboard at night, the rod cells are not in a highly stimulated state. Therefore, when the human eye shifts from the dashboard to the dark road or driving environment ahead, the rod cells start working immediately without the need for adaptation and switching time, thereby achieving both visibility and clarity in low-light environments (red light stimulates cones) and vision and safety in surrounding low-light environments (red light does not stimulate rods), thereby improving the user experience.

[0043] It should be noted that, although in this example, when the ambient brightness of the display panel is greater than or equal to the preset threshold, in the lit pixel unit, only the first pixel unit 10 emits light, and when the ambient brightness of the display panel is less than the preset threshold, in the lit pixel unit, only the first sub-pixels R1 and R2 emit light, the present disclosure is not limited to this. If necessary, in a bright environment, both the first pixel unit 10 and the second pixel unit 20 may emit light, or, in a bright condition, only the first pixel unit 10 emits light, and in a dark environment, only the second pixel unit 20 emits light.

[0044] However, in a bright environment, if both the first pixel unit 10 and the second pixel unit 20 emit light, if white light needs to be synthesized, the currents of the two first sub-pixels R1 and R2 need to be adjusted to ensure a suitable grayscale, thereby increasing the driving difficulty and circuit structure of the driving current. In a dark environment, if only one first sub-pixel R2 emits light, in order for the instrument panel to display sufficient brightness, compared to the case where both the first sub-pixels R1 and R2 emit light, it is necessary to increase the driving current provided to the middle and low sub-pixels R2. In this case, compared to the example in which the two first sub-pixels R1 and R2 are lit in a dark environment, the driving difficulty and circuit structure of the driving current will also be increased. At the same time, when the driving current of the first sub-pixel R2 is increased, the life of the first sub-pixel R2 will be reduced.

[0045] In other words, in the embodiments of the present disclosure, in a bright environment, among the lit pixel units, the first pixel unit 10 consisting of a first sub-pixel R1, a second sub-pixel G and a third sub-pixel B is lit, and in a dark (or shadow) environment, among the lit pixel units, only the first sub-pixels R1 and R2 are lit, that is, the first sub-pixel R1 and the second pixel unit 20 in the first pixel unit 10 are lit at the same time, so that white light can be emitted in a bright environment and red light with a brightness that is conducive to human eye recognition in a dark environment can be emitted with a simplest circuit structure, and at the same time, the first sub-pixels R1 and R2 can have the same lifespan.

[0046] Optionally, the preset threshold is a brightness critical value at which the human eye switches from viewing objects using rod cells to viewing objects using cone cells, and the preset threshold may be 3 nit.

[0047] Further optionally, continue to refer to Figure 2 As shown, the first pixel unit 10 includes: a first sub-pixel R1, a second sub-pixel G and a third sub-pixel B, the second sub-pixel emits green light, the third sub-pixel emits blue light, and the second pixel unit includes a first sub-pixel. That is, Figure 2 The examples are based on the Real structure.

[0048] The display panel includes: a first pixel column and a second pixel column arranged at intervals, the first sub-pixel R1 and the second sub-pixel G in the first pixel unit 10 are located in the first pixel column and arranged at intervals, and the third sub-pixel B is located in the second pixel column. At the same time, the first sub-pixel R2 in two adjacent second pixel units 20 is integrally arranged and arranged between the two third sub-pixels B in the second pixel column.

[0049] Through this arrangement, the second pixel unit 20 in the disclosed embodiment can be arranged in a space based on the pixel layout of the existing Real structure by utilizing the layout interval between a column of sub-pixels B, so that the visual visibility and safety requirements in a dark environment in the disclosed embodiment can be achieved without significantly changing the existing sub-pixel mesh layout. In addition, by integrally arranging the first sub-pixels R2 of two adjacent second pixel units 20, the design of arranging a separate first sub-pixel R2 for two second pixel units can utilize limited space to increase the light-emitting area of ​​the first sub-pixel R2, thereby improving the light-emitting brightness in a dark environment under the same conditions.

[0050] Optionally, the distance between the first sub-pixel R2 and an adjacent sub-pixel in the second pixel unit 20 is greater than or equal to 10 μm.

[0051] In the embodiment of the present disclosure, the size and layout of the first sub-pixel R2 only need to meet the minimum size requirement of the patterning process. Of course, as the patterning process becomes more advanced, this value can be further reduced.

[0052] In order to ensure the addition of red sub-pixels in a limited space, the ratio of the projection area of ​​the first sub-pixel R2 in the second pixel unit 20 on the light-emitting surface of the display panel to the projection area of ​​the first sub-pixel R1 in the first pixel unit 10 on the light-emitting surface of the display panel can be greater than or equal to 0.5 and less than or equal to 2.

[0053] Alternatively, considering that the life of the red sub-pixel is longer than that of the blue sub-pixel and the green sub-pixel, and that the life of the sub-pixel is affected by the area, the larger the area of ​​the same sub-pixel, the longer the life. In the embodiment of the present disclosure, in the first pixel unit 10, the ratio of the projection area of ​​the second sub-pixel G on the light-emitting surface of the display panel to the projection area of ​​the first sub-pixel R1 on the light-emitting surface of the display panel is greater than or equal to 1.5 and less than or equal to 4.5, and at the same time, the ratio of the projection area of ​​the third sub-pixel B on the light-emitting surface of the display panel to the projection area of ​​the first sub-pixel R1 on the light-emitting surface of the display panel is greater than or equal to 1.5 and less than or equal to 4.5. Through this setting, the life of the sub-pixels of each color can be balanced, thereby optimizing the display life of the display panel.

[0054] Of course, despite Figure 2 The example shows that the shape of the sub-pixel is a rectangle, but the present disclosure is not limited to this. Sub-pixels of other shapes are also protected by the present disclosure. For example, the cross-section of the sub-pixel parallel to the light-emitting surface of the display panel can be circular, rhombus, diamond, or other polygonal.

[0055] Additionally and optionally, the display panel further includes a sensor, which is disposed in a non-display area of ​​the display panel and is used to sense the brightness of an environment in which the display panel is located.

[0056] However, it should be noted that the present disclosure is not intended to limit the sensor for the ambient brightness of the display panel to be set in the display panel. In some cases, considering the width limitation of the display panel frame, the sensor may be set outside the display panel. For example, the sensor may be set in a display device including the display panel, or in an area outside the display device where the display panel is located that can sense the brightness of the environment in which the display panel is located.

[0057] Figure 3 Another optional embodiment structure of the present disclosure is shown. Figure 3As shown, the display panel includes a plurality of pixel units, and the pixel unit includes at least two first sub-pixels R1 and R2, that is, two red sub-pixels, and in addition, the pixel unit also includes: a second sub-pixel G emitting green light and a third sub-pixel B emitting blue light. Specifically in this example, the pixel unit of the display panel includes: a first pixel unit 10' and a second pixel unit 20'.

[0058] The first pixel unit 10 ′ includes: a first sub-pixel R1 , a second sub-pixel G and a third sub-pixel B, and the second pixel unit 20 ′ includes: a first sub-pixel R2 .

[0059] Of course, despite Figure 3 The example shows that the shape of the sub-pixel is circular, but the present disclosure is not limited to this. Sub-pixels of other shapes are also protected by the present disclosure. For example, the cross-section of the sub-pixel parallel to the light-emitting surface of the display panel can be rectangular, rhombus, diamond, or other polygonal.

[0060] In particular, from Figure 3 An example of this can be seen, Figure 3 Another improved arrangement structure based on the Real pixel layout is proposed to more easily insert a second pixel unit into a first pixel unit of an RGB pixel structure.

[0061] Specifically, refer to Figure 3 As shown, the first sub-pixel, the second sub-pixel, the third sub-pixel of the first pixel unit 10' and the first sub-pixel in the second pixel unit 20' are arranged in a quadrilateral in a cross section parallel to the light emitting surface of the display panel.

[0062] like Figure 3 As shown, the first sub-pixel R1 or the first sub-pixel R2 is disposed between two adjacent third sub-pixels B, and a larger space is left between two adjacent first pixel units 10' for arranging the second pixel unit 20'.

[0063] Of course, the present application does not intend to limit the distance between the first sub-pixel R2 and the adjacent sub-pixel in the second pixel unit 20 , as long as the distance is greater than or equal to 10 μm.

[0064] In the embodiment of the present disclosure, the size and layout of the first sub-pixel R2 only need to meet the minimum size requirement of the patterning process. Of course, as the patterning process becomes more advanced, this value can be further reduced.

[0065] In order to ensure the addition of red sub-pixels in a limited space, the ratio of the projection area of ​​the first sub-pixel R2 in the second pixel unit 20 on the light-emitting surface of the display panel to the projection area of ​​the first sub-pixel R1 in the first pixel unit 10 on the light-emitting surface of the display panel can be greater than or equal to 0.5 and less than or equal to 2.

[0066] Alternatively, considering that the life of the red sub-pixel is longer than that of the blue sub-pixel and the green sub-pixel, and that the life of the sub-pixel is affected by the area, the larger the area of ​​the same sub-pixel, the longer the life. In the embodiment of the present disclosure, in the first pixel unit 10, the ratio of the projection area of ​​the second sub-pixel G on the light-emitting surface of the display panel to the projection area of ​​the first sub-pixel R1 on the light-emitting surface of the display panel is greater than or equal to 1.5 and less than or equal to 4.5, and at the same time, the ratio of the projection area of ​​the third sub-pixel B on the light-emitting surface of the display panel to the projection area of ​​the first sub-pixel R1 on the light-emitting surface of the display panel is greater than or equal to 1.5 and less than or equal to 4.5. Through this setting, the life of the sub-pixels of each color can be balanced, thereby optimizing the display life of the display panel.

[0067] Of course, in this embodiment, the configuration of the pixel units in the display panel is the same as that in the above embodiment, that is, when the ambient brightness of the display panel is greater than or equal to the preset threshold, in the lit pixel unit, at least one first sub-pixel R1 and other sub-pixels except the first sub-pixel R1 emit light, and when the ambient brightness of the display panel is less than the preset threshold, in the lit pixel unit, only at least one first sub-pixel emits light.

[0068] Specifically, assuming that the application scenario of the display panel is a car dashboard, when the display panel displays the status of various instruments of the car, only the pixel units related to the instrument status, such as the dashboard shape, pointer position, and numbers, are lit, and the pixel units at other positions are off.

[0069] Specifically in this example, when the ambient brightness of the display panel is greater than or equal to a preset threshold, it means that the display panel is in a bright environment, then the first pixel unit 10' emits light, that is, the first sub-pixel R1, the second sub-pixel G and the third sub-pixel B in the pixel unit are lit, so that the cone cells can perceive red light, green light and red light, and thus feel the white instrument panel outline, pointers and numbers, etc.; when the ambient brightness of the display panel is less than the preset threshold, it means that the display panel is in a dark environment (or shadow environment), then only the red first sub-pixels R1 and R2 are lit, and the sub-pixels emitting other colors of light are in an off state, so that in a background environment with low light intensity, the cone cells can perceive the ... The selective stimulation of cones with red light enables the human eye to normally recognize the dashboard in a dark environment. At the same time, the rod cells are not easily stimulated by red wavelength light waves (i.e., they are insensitive to red light), thereby isolating the rod cells and preventing them from failing. As a result, when a person looks at the dashboard at night, the rod cells are not in a highly stimulated state. Therefore, when the human eye shifts from the dashboard to the dark road or driving environment ahead, the rod cells start working immediately without the need for adaptation and switching time, thereby achieving both visibility and clarity in low-light environments (red light stimulates cones) and vision and safety in surrounding low-light environments (red light does not stimulate rods), thereby improving the user experience.

[0070] It should be noted that, although in this example, when the ambient brightness of the display panel is greater than or equal to the preset threshold, among the lit pixel units, only the first pixel unit 10' emits light, and when the ambient brightness of the display panel is less than the preset threshold, among the lit pixel units, only the first sub-pixels R1 and R2 emit light, the present disclosure is not limited thereto. If necessary, in a bright environment, both the first pixel unit 10' and the second pixel unit 20' may emit light, or, in a bright condition, only the first pixel unit 10' emits light, and in a dark environment, only the second pixel unit 20' emits light.

[0071] However, in a bright environment, if both the first pixel unit 10' and the second pixel unit 20' emit light, if white light needs to be synthesized, the currents of the two first sub-pixels R1 and R2 need to be adjusted to ensure a suitable grayscale, thereby increasing the driving difficulty and circuit structure of the driving current. In a dark environment, if only one first sub-pixel R2 emits light, in order for the instrument panel to display sufficient brightness, compared to the case where both the first sub-pixels R1 and R2 emit light, it is necessary to increase the driving current provided to the middle and low sub-pixels R2. In this case, compared to the example in which the two first sub-pixels R1 and R2 are lit in a dark environment, the driving difficulty and circuit structure of the driving current will also be increased. At the same time, when the driving current of the first sub-pixel R2 is increased, the life of the first sub-pixel R2 will be reduced.

[0072] In other words, in the embodiments of the present disclosure, in a bright environment, among the lit pixel units, a first pixel unit 10' consisting of a first sub-pixel R1, a second sub-pixel G and a third sub-pixel B is lit, and in a dark (or shadow) environment, among the lit pixel units, only the first sub-pixels R1 and R2 are lit, that is, the first sub-pixel R1 and the second pixel unit 20 in the first pixel unit 10' are lit at the same time, so that white light can be emitted in a bright environment and red light with a brightness that is conducive to human eye recognition can be emitted in a dark environment with a simplest circuit structure, and at the same time, the first sub-pixels R1 and R2 can have the same lifespan.

[0073] Optionally, the preset threshold is a brightness critical value at which the human eye switches from viewing objects using rod cells to viewing objects using cone cells, and the preset threshold may be 3 nit.

[0074] Additionally and optionally, the display panel further includes a sensor, which is disposed in a non-display area of ​​the display panel and is used to sense the brightness of an environment in which the display panel is located.

[0075] However, it should be noted that the present disclosure is not intended to limit the sensor for the ambient brightness of the display panel to be set in the display panel. In some cases, considering the width limitation of the display panel frame, the sensor may be set outside the display panel. For example, the sensor may be set in a display device including the display panel, or in an area outside the display device where the display panel is located that can sense the brightness of the environment in which the display panel is located.

[0076] Based on the same inventive concept, another aspect of the present disclosure provides a method for driving the display panel provided by the above-mentioned embodiment, comprising:

[0077] When the received ambient brightness of the display panel is greater than or equal to a preset threshold, in the lit pixel unit, at least one first sub-pixel and other sub-pixels except the first sub-pixel emit light, and when the received ambient brightness of the display panel is less than the preset threshold, in the lit pixel unit, only at least one first sub-pixel emits light.

[0078] Specifically, refer to Figure 4 As shown, Figure 4 Shown with Figure 2 or Figure 3 The example driving flow chart shown is as follows: Figure 4 As shown, when it is determined that the ambient brightness sensed by the sensor is greater than or equal to a preset threshold, only the first pixel unit is lit, so that the picture can be displayed in white light. When it is determined that the ambient brightness sensed by the sensor is less than the preset threshold, the first sub-pixels R1 and R2 are lit, so that the displayed picture is a red picture.

[0079] Through this setting, the display panel can light up only the red sub-pixel when the ambient brightness of the display panel is low, thereby being able to simultaneously meet the two requirements of strong visibility in bright environments and visibility and safety in dark environments.

[0080] Of course, those skilled in the art should understand that the driving method of the embodiment of the present disclosure is not limited to Figure 4 In the process, if the driving circuit structure and wiring allow, when it is determined that the ambient brightness sensed by the sensor is less than the preset threshold, the second pixel unit can also be lit, which will not be repeated here.

[0081] Another embodiment of the present disclosure provides a display device, including the display panel provided in the above embodiment. The display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, etc., especially a vehicle-mounted display panel, a navigator, etc. of various vehicles. When the display panel is loaded, it can simultaneously meet the two requirements of strong visibility in a bright environment and visibility and safety in a dark environment.

[0082] It should be noted that the implementation method of the display panel in the display device has been described in detail above and will not be repeated here.

[0083] Obviously, the above embodiments of the present disclosure are merely examples for clearly illustrating the present disclosure, and are not limitations on the implementation methods of the present disclosure. For ordinary technicians in this field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present disclosure are still within the protection scope of the present disclosure.

Claims

1. A display panel, characterized in that: include: A pixel unit arranged in an array, the pixel unit comprising: a plurality of sub-pixels, the plurality of sub-pixels comprising at least one first sub-pixel emitting a first color light and at least one second sub-pixel emitting a second color light, the first color light being red light, the second color light being different from the first color light, The display panel is configured such that, when the ambient brightness of the display panel is greater than or equal to a preset threshold, in the lit pixel units, at least one of the first sub-pixels and other sub-pixels except the first sub-pixel emit light, and when the ambient brightness of the display panel is less than the preset threshold, in the lit pixel units, only at least one of the first sub-pixels emits light.

2. The display panel according to claim 1, characterized in that: The pixel unit includes at least two of the first sub-pixels, and the pixel unit includes a first pixel unit and a second pixel unit, wherein: The first pixel unit includes at least one of the first sub-pixel and the second sub-pixel, and the second pixel unit is composed of the first sub-pixels except the sub-pixels in the first pixel unit. The display panel is configured such that when the ambient brightness of the display panel is greater than or equal to the preset threshold, only the first pixel unit among the lit pixel units emits light, and when the ambient brightness of the display panel is less than the preset threshold, only the first sub-pixel among the lit pixel units emits light.

3. The display panel according to claim 2, characterized in that: The first pixel unit includes: one first sub-pixel, one second sub-pixel and one third sub-pixel, the second sub-pixel emits green light, the third sub-pixel emits blue light, and the second pixel unit includes one first sub-pixel.

4. The display panel according to claim 3, characterized in that: The display panel comprises: a first pixel column and a second pixel column arranged at intervals, the first sub-pixel and the second sub-pixel in the first pixel unit are located in the first pixel column and arranged at intervals, and the third sub-pixel is located in the second pixel column. The first sub-pixels in two adjacent second pixel units are integrally arranged and arranged between two third sub-pixels in the second pixel column.

5. The display panel according to claim 3, characterized in that: The first sub-pixel, the second sub-pixel, the third sub-pixel of the first pixel unit and the first sub-pixel in the second pixel unit are arranged in a quadrilateral in a cross section parallel to the light emitting surface of the display panel.

6. The display panel according to claim 2, characterized in that: A ratio of a projection area of ​​the first sub-pixel in the second pixel unit on the light emitting surface of the display panel to a projection area of ​​the first sub-pixel in the first pixel unit on the light emitting surface of the display panel is greater than or equal to 0.5 and less than or equal to 2.

7. The display panel according to claim 2, characterized in that: A distance between the first sub-pixel and an adjacent sub-pixel in the second pixel unit is greater than or equal to 10 μm.

8. The display panel according to claim 1, characterized in that: The sub-pixel has a shape of one of a circle, a rectangle, a rhombus and a diamond.

9. The display panel according to claim 1, characterized in that: The preset threshold is a critical brightness value at which the human eye switches from viewing objects with rod cells to viewing objects with cone cells.

10. The display panel according to claim 1, characterized in that: Also includes: A sensor is disposed in a non-display area of ​​the display panel, and the sensor senses the brightness of an environment where the display panel is located.

11. A display device, characterized in that: include: The display panel according to any one of claims 1 to 10.

12. A method for driving a display panel according to any one of claims 1 to 10, characterized in that: When the received ambient brightness of the display panel is greater than or equal to a preset threshold, in the lit pixel unit, at least one of the first sub-pixels and other sub-pixels except the first sub-pixel emit light; when the received ambient brightness of the display panel is less than the preset threshold, in the lit pixel unit, only at least one of the first sub-pixels emits light.

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