Display panel and display device

Abstract

The application discloses a display panel and a display device, the display panel comprises a display substrate, a light sensor, a dispersion prism and a light collection unit, the light sensor is arranged on the display substrate; the dispersion prism is arranged on the side of the light sensor away from the display substrate and is used for dispersing ambient light into light of different wavelengths; and the light collection unit is arranged between the light sensor and the dispersion prism and is used for converging visible light dispersed by the dispersion prism onto the light sensor. By additionally arranging the dispersion prism and the light collection unit on the light sensor, the ambient light is dispersed into light of different wavelengths by the dispersion prism, then the dispersed visible light is converged onto the light sensor by the light collection unit, at this time, only visible light is received by the light sensor, and no invisible light is received, so that the influence of invisible light such as infrared light and ultraviolet light in the ambient light on the detection of the light sensor is avoided, and the precision of the light sensor is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0002] The backlight power saving technology of the liquid crystal display mainly increases a photosensitive element in the backlight module, and the photosensitive element detects the brightness of the ambient light to adjust the backlight brightness in real time. However, this not only occupies the whole machine space, but also reduces the screen ratio of the display screen. In addition, the photosensitive element in the backlight module needs to increase an IC chip with light sensing function, which leads to high product cost. Therefore, most panel manufacturers try to integrate the photosensitive element directly into the panel. Thin film transistor (TFT) is used as a photosensitive element. The difference in characteristics before and after the TFT is exposed to light is used to monitor the size of the leakage current to feedback the brightness of the ambient light, so as to adjust the backlight brightness.

[0003] Because the light wave composition of the ambient light is complex, it contains visible light and invisible light such as infrared light and ultraviolet light. For the ambient light sensor, only the light wave with a wavelength of 380-780 nanometers is the effective light wave that is expected to be used. The ultraviolet light and infrared light with a wavelength outside 380-780 nanometers will cause the sensitivity of the light sensor to decrease, affecting the accuracy of the detection of the light sensor. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a display panel and a display device to improve the problem that the ultraviolet light and infrared light in the ambient light cause the light sensor to detect inaccurately.

[0005] The embodiments of the present application disclose a display panel, which comprises a display substrate, a light sensor, a dispersion prism and a light collecting unit. The light sensor is arranged on the display substrate and is used for sensing ambient light. The dispersion prism is arranged on the side of the light sensor away from the display substrate and is used for dispersing the ambient light into light with different wavelengths. The light collecting unit is arranged between the light sensor and the dispersion prism and is used for converging the visible light dispersed by the dispersion prism onto the light sensor.

[0006] Optionally, the display panel further comprises a light shielding unit. The light shielding unit is arranged on the side of the dispersion prism facing the light collecting unit, and is used for shielding the invisible light dispersed by the dispersion prism. The light shielding unit comprises a first blocking piece and a second blocking piece. The first blocking piece and the second blocking piece are respectively arranged at the two ends of the side of the dispersion prism facing the light collecting unit.

[0007] Optionally, the light shielding unit is a black coating coated on the surface of the dispersion prism.

[0008] Optionally, the display panel further comprises a color film substrate, an optical adhesive layer and a cover plate, the color film substrate and the display substrate are arranged in a cell-to-cell manner, the cover plate is arranged on a side of the color film substrate away from the display substrate, the cover plate and the color film substrate are bonded by the optical adhesive layer; the dispersion prism is arranged on the optical adhesive layer, the light condensing unit and the light shielding unit are arranged on the color film substrate; the light shielding unit is arranged on a non-display area of the color film substrate, the light shielding unit is provided with an opening, and the normal projection of the light condensing unit and the light sensor on the display substrate is located in the normal projection range of the opening on the display substrate.

[0009] Optionally, the normal projection of the middle region of the dispersion prism on the display substrate is located in the normal projection range of the opening on the display substrate, and the normal projection of the two ends of the dispersion prism on the display substrate is located outside the normal projection range of the opening on the display substrate.

[0010] Optionally, the display panel further comprises a lens, the lens is arranged on a side of the dispersion prism away from the light condensing unit, and the lens is a light condensing lens for condensing ambient light onto the dispersion prism.

[0011] Optionally, the normal projection of the lens on the display substrate covers the normal projection of the dispersion prism on the display substrate, and the area of the normal projection of the lens on the display substrate is greater than the area of the normal projection of the dispersion prism on the display substrate.

[0012] Optionally, the lens is formed by local grinding of the cover plate, and the light condensing unit is formed by local grinding of a substrate in the color film substrate.

[0013] Optionally, the light condensing unit comprises a convex lens or a prism.

[0014] The embodiment of the application further discloses a display device, which comprises a driving circuit and the display panel as described above, and the driving circuit provides backlight for the display panel.

[0015] The embodiment of the application has the beneficial effects that: the embodiment of the application integrates the light sensor in the display panel, and additionally arranges the dispersion prism and the light condensing unit on the light sensor, uses the dispersion prism to disperse ambient light into light of different wavelengths, and then uses the light condensing unit to condense the dispersed visible light into white light, the white light does not contain invisible light such as infrared light and ultraviolet light, after the re-condensed white light is collected on the light sensor, the light sensor only receives visible light and does not receive invisible light, thereby avoiding the influence of invisible light such as infrared light and ultraviolet light in ambient light on the detection of the light sensor, and improving the precision of the light sensor. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is to be understood that the drawings are solely for purposes of illustration to be read in connection with the description. The drawings, which are described below, are included to illustrate certain embodiments of the application and are a part of the detailed description. It will be readily apparent to one skilled in the art that alternative embodiments of the present application can be practiced without departing from the scope of the application as set forth in the claims.

[0017] Figure 1 is a partial schematic view of a display panel provided by an embodiment of the present application;

[0018] Figure 2 is a partial schematic view of a display panel provided by an embodiment of the present application, which has a lens;

[0019] Figure 3 is a schematic view of the light path of a convex lens;

[0020] Figure 4 is a partial schematic view of a display panel provided by an embodiment of the present application, which has a light shielding unit;

[0021] Figure 5 is a schematic view of the spectrum of ambient light after passing through a dispersion prism;

[0022] Figure 6 is a schematic view of a light collecting unit as a prism provided by an embodiment of the present application;

[0023] Figure 7 is a schematic view of a display panel provided by an embodiment of the present application;

[0024] Figure 8 is a schematic view of a display device provided by an embodiment of the present application.

[0025] In the drawings: 10, display device; 20, display panel; 30, driving circuit; 100, display substrate; 200, color film substrate; 300, optical adhesive layer; 400, cover plate; 500, light sensor; 600, dispersion prism; 700, light collecting unit; 800, lens; 900, light shielding unit; 910, first stop block; 920, second stop block; 930, opening. DETAILED DESCRIPTION

[0026] It is to be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to be limiting. It must be noted that, as used in the specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. The term "plurality" refers to two or more. The terms "comprises", "comprising", "includes", "including", "has", "having" and the like can be used in the detailed description and in the claims. These terms are open-ended and do not exclude additional, unrecited elements or method steps. The terms "about" and "substantially" are used to describe acceptable variability in a measurement, value, or a result. Unless otherwise stated, the aforementioned terms mean "about" or "substantially" when used to describe acceptable variability in a measurement, value, or a result.

[0027] In addition, unless otherwise explicitly specified and limited, "connected", "connection" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0028] Figure 1 is a partial schematic view of a display panel provided by an embodiment of the present application, as shown in Figure 1 The display panel 20 includes a display substrate 100, a light sensor 500, a dispersion prism 600, and a light condensing unit 700. The light sensor 500 is arranged on the display substrate 100 and is used to sense ambient light. The dispersion prism 600 is arranged on the side of the light sensor 500 away from the display substrate 100 and is used to disperse ambient light into light of different wavelengths. The light condensing unit 700 is arranged between the light sensor 500 and the dispersion prism 600 and is used to condense visible light dispersed by the dispersion prism 600 onto the light sensor 500.

[0029] By integrating the light sensor 500 in the display panel 20 and additionally arranging the dispersion prism 600 and the light condensing unit 700 on the light sensor 500, the dispersion prism 600 is used to disperse ambient light into light of different wavelengths, and then the light condensing unit 700 is used to condense the dispersed visible light into white light. At this time, the white light does not contain invisible light such as infrared light and ultraviolet light. After the re-condensed white light is collected on the light sensor 500, the light sensor 500 only receives visible light and does not receive invisible light, thereby avoiding the influence of invisible light such as infrared light and ultraviolet light in ambient light on the detection of the light sensor 500 and improving the accuracy of the light sensor 500.

[0030] Specifically, the dispersion prism 600 can be a three-prism, a four-sided prism, or other dispersion prisms. Taking a three-prism as an example, the three-prism has a light dispersion characteristic of dispersing ambient light into light of different wavelengths. When light enters the three-prism, it will first undergo a first refraction and then be refracted out at different angles. Among them, red light has a larger wavelength and a smaller refraction angle. Blue light has a relatively small wavelength and a larger refraction angle. Therefore, light of different wavelengths will be dispersed into a spectrum, which includes visible light such as red, orange, yellow, green, blue, indigo, and violet, as well as invisible light with a wavelength greater than red light and invisible light with a wavelength less than violet light.

[0031] The light condensing unit 700 is used for condensing light, and can condense the visible light dispersed by the dispersion prism 600 and then irradiate the light to the light sensor 500. It should be understood that the invisible light dispersed by the dispersion prism 600 is either blocked, reflected, or dispersed to an area outside the light condensing unit 700, so that the invisible light cannot irradiate the light condensing unit 700, rather than the light condensing unit 700 cannot condense the invisible light.

[0032] In the product design, the size and angle of the dispersion prism 600, and the distance between the light sensor 500, the dispersion prism 600 and the light condensing unit 700 are adjusted by experiments, so that the ambient light is dispersed into light of different wavelengths after irradiating the dispersion prism 600, and then the visible light is condensed by the light condensing unit 700 to the light sensor 500, so that the light sensor 500 only receives the visible light in the ambient light.

[0033] As shown in Figure 2 As a further embodiment, the display panel 20 further includes a lens 800, which is disposed on the side of the dispersion prism 600 away from the light condensing unit 700, and the lens 800 is a light condensing lens used for condensing ambient light to the dispersion prism 600.

[0034] Figure 3 A light path diagram of a convex lens is shown in Figure 3 As shown in the figure, the focal length f' of the convex lens is nr1r2 / (n-1)[n(r2-r1)+(n-1)d], where n is the refractive index of the convex lens material, d is the center thickness of the lens 800, r1 and r2 are the radii of curvature of the two surfaces of the convex lens, r1 is positive, and r2 is negative. Therefore, for a convex lens with a fixed refractive index, the smaller the radius of curvature, the larger the d, and the smaller the focal length; on the contrary, the larger the radius of curvature, the smaller the d, and the larger the focal length.

[0035] The design of the lens 800 combined with the dispersion prism 600 is adopted, the smaller the focal length of the lens 800, the smaller the distance between the lens 800 and the dispersion prism 600, and vice versa. Therefore, by adjusting the height of the lens 800, the focal point of the lens 800 can fall on the surface of the dispersion prism 600, so as to disperse the light into light of different wavelengths.

[0036] The embodiment adds the lens 800, and the lens 800 can collect all ambient light above the dispersion prism 600 into a point or a small area in the dispersion prism 600, so that all ambient light is refracted at the point, and finally the light out of the dispersion prism 600 is in the same spectrum, so that the light of the same wavelength passing through the dispersion prism 600 converges together, at this time, it is easier to design the filtering and shielding of invisible light and the convergence of visible light, and the convergence effect of the light and the brightness can be improved. The problem that the light out of the dispersion prism 600 is spectrum shifted due to the difference of the refractive position and angle is avoided.

[0037] Further, the surface area of the lens 800 is greater than the surface area of the dispersion prism 600, that is, the orthographic projection of the lens 800 on the display substrate 100 covers the orthographic projection of the dispersion prism 600 on the display substrate 100, and the area of the orthographic projection of the lens 800 on the display substrate 100 is greater than the area of the orthographic projection of the dispersion prism 600 on the display substrate 100. Through this design, the lens 800 can converge more ambient light, improve the amount of light converged on the light sensor 500, compensate for the filtering and weakening of ambient light by the dispersion prism 600, the light converging unit 700 and other film layers in the display panel 20, and thus improve the detection accuracy of the light sensor 500.

[0038] In the embodiment of the application, as shown in Figure 4 The display panel 20 further includes a light shielding unit 900, the light shielding unit 900 is arranged on the side of the dispersion prism 600 facing the light converging unit 700, and the light shielding unit 900 is used for shielding invisible light dispersed by the dispersion prism 600; the light shielding unit 900 includes a first blocking block 910 and a second blocking block 920, and the first blocking block 910 and the second blocking block 920 are arranged at two ends of the side of the dispersion prism 600 facing the light converging unit 700, respectively.

[0039] As shown in Figure 5As shown, after the ambient light passes through the dispersion prism 600, it is dispersed into a spectrum composed of red, orange, yellow, green, blue, indigo, violet, and invisible light such as infrared and ultraviolet. The invisible light with a wavelength greater than the red light is outside the red light, and the invisible light with a wavelength less than the violet light is outside the violet light. The light shielding unit 900 is used to shield the invisible light. Since there is invisible light with a wavelength greater than the visible light and invisible light with a wavelength less than the visible light, the embodiment of the present application sets the first blocking block 910 and the second blocking block 920 at the two ends of the side of the dispersion prism 600 facing the light collecting unit 700, respectively, uses the first blocking block 910 to shield the invisible light with a wavelength less than the visible light, and uses the second blocking block 920 to shield the invisible light with a wavelength greater than the visible light, so as to achieve the purpose of shielding different types of invisible light.

[0040] For the specific position design and specific size design of the first blocking block 910 and the second blocking block 920, in the design stage, the position of the invisible light in the dispersion prism 600 when it comes out of the side of the dispersion prism 600 facing the light collecting unit 700 after the ambient light passes through the dispersion lens 800 can be simulated for corresponding design, or the wavelength of the light passing through the dispersion prism 600 can be measured by optical instruments to adjust the positions of the first blocking block 910 and the second blocking block 920; and for the two cases of whether the lens 800 is above the dispersion prism 600, corresponding simulation can also be performed respectively.

[0041] Specifically, the light shielding unit 900 is a black coating coated on the surface of the dispersion prism 600, for example, black ink or other black materials are coated on the surface of the dispersion prism 600.

[0042] Of course, other dark coatings can also be coated on the surface of the dispersion prism 600, or dark adhesive tape, dark blocking blocks or other light blocking structures can be pasted on the surface of the dispersion prism 600. Alternatively, instead of setting the light shielding unit 900 on the side of the dispersion prism 600 facing the light collecting unit 700, a reflection unit, a filtering unit or other shielding structures can be set to reflect or filter the invisible light, as long as the ultraviolet light, infrared light and other invisible light can not irradiate the light sensor 500.

[0043] Of course, in other embodiments, the display panel 20 can also not have the light shielding unit 900, and the size or distance of the dispersion prism 600 and the light collecting unit 700 can be adjusted, for example, the size of the light collecting unit 700 is reduced, so that the light collecting unit 700 can only receive the visible light dispersed by the dispersion prism 600, and the invisible light dispersed by the dispersion prism 600 will not irradiate the light collecting unit 700.

[0044] In a specific design, the dispersion prism 600 can be made of a material with a high refractive index or the size of the top angle of the dispersion prism 600 can be increased to increase the dispersion degree of the dispersion prism 600, so that the light shielding unit 900 can better shield the infrared light and the ultraviolet light and reduce the influence of the invisible light on the light sensor 500.

[0045] As an optional implementation, as shown in Figure 1 The light collecting unit 700 is a convex lens, which converges the visible light dispersed by the dispersion prism 600 onto the light sensor 500 by using the light converging principle of the convex lens. Since the convex lens can make the light have a high convergence degree, the light collecting effect can be improved by using this implementation.

[0046] As another optional implementation, as shown in Figure 6 The light collecting unit 700 is a prism, which converges the visible light dispersed by the dispersion prism 600 onto the light sensor 500 by using the refraction principle of the prism. The prism has the same design as the dispersion prism 600, and can also be a tri-prism. The position of the prism is adjusted so that the light dispersed by the dispersion prism 600 is converged by the light collecting unit 700, and the state of the dispersed light after passing through the light collecting unit 700 is similar to the state of the light before entering the dispersion prism 600 and the state of the non-visible light being removed.

[0047] In the embodiment of the present application, the display panel 20 can be a liquid crystal (LCD) display panel, an organic electroluminescence display (OLED) display panel or other types of display panels. When the display panel 20 is a liquid crystal display panel, the display substrate 100 is an array substrate, the display panel 20 further includes a color film substrate 200 and a liquid crystal layer, the display substrate 100 and the color film substrate 200 are arranged in a cell, and the liquid crystal layer is arranged between the display substrate 100 and the color film substrate 200. When the display panel 20 is an organic electroluminescence display panel, the display panel 20 further includes an encapsulation layer, which is arranged on the display substrate 100 and used for encapsulating the devices on the display substrate 100.

[0048] As shown in Figure 7As shown, as a specific embodiment, the display panel 20 is a liquid crystal display panel, the display substrate 100 is an array substrate, the display panel 20 further comprises a color film substrate 200, an optical adhesive layer 300 and a cover plate 400, the color film substrate 200 and the display substrate 100 are arranged in a box, the light sensor 500 is arranged on the side of the display substrate 100 facing the color film substrate 200, the light sensor 500 can adopt a (Thin Film Transistor, TFT) structure, and can be formed by the same process as the active switch on the display substrate 100, so as to reduce the manufacturing cost of the light sensor 500 and improve the production efficiency of the display panel 20.

[0049] Of course, in other embodiments, the light sensor 500 can be a diode photoelectric structure made on the display substrate 100, or a chip structure attached to the display substrate 100.

[0050] The cover plate 400 is arranged on the side of the color film substrate 200 away from the display substrate 100, the cover plate 400 and the color film substrate 200 are bonded by the optical adhesive layer 300; the dispersion prism 600 is arranged in the optical adhesive layer 300, the dispersion prism 600 is filled in the optical adhesive layer 300 before the optical adhesive layer 300 is cured, and then the cover plate 400 is covered. Among them, the dispersion prism 600 can adopt a three-pronged right-angle lens, one right-angle surface of the three-pronged right-angle lens is arranged parallel to the color film substrate 200 and is attached to the surface of the color film substrate 200, so as to improve the stability of the dispersion prism 600, prevent the dispersion prism 600 from deviating in angle due to its own gravity or the movement of the display panel 20 during the curing process of the optical adhesive layer 300, affect the light dispersion angle, and ultimately affect the detection effect of the light sensor 500.

[0051] The light condensing unit 700 and the light shielding unit 900 are arranged on the color film substrate 200, the light shielding unit 900 is arranged in the non-display area of the color film substrate 200, and the light sensor 500 is arranged in the non-display area of the display substrate 100. Among them, the light shielding unit 900 is a black matrix structure originally in the non-display area of the color film substrate 200, which is used to prevent light leakage in the non-display area, and the present embodiment makes an opening 930 on the black matrix structure, so that the orthographic projection of the light condensing unit 700 and the light sensor 500 on the display substrate 100 is located within the orthographic projection range of the opening 930 on the display substrate 100.

[0052] And, the central region of the dispersion prism 600 is projected onto the display substrate 100 within the range of the opening 930 projected onto the display substrate 100, and the two ends of the dispersion prism 600 are projected onto the display substrate 100 outside the range of the opening 930 projected onto the display substrate 100, so that the invisible light dispersed by the dispersion prism 600 is shielded by the light shielding unit 900.

[0053] In the embodiment, the lens 800 is formed by locally grinding the cover plate 400, and the light condensing unit 700 is formed by locally grinding the substrate in the color film substrate 200, i.e., only the positions where the lens 800 is arranged in the cover plate 400 and the positions where the light condensing unit 700 is arranged in the substrate in the color film substrate 200 are ground to form convex lens shapes with curved surfaces, so that the light condensing effect is achieved.

[0054] In the embodiment, the cover plate 400 and the substrate in the color film substrate 200 are made of transparent glass, so that high transparency is ensured, and the lens 800 is arranged in the cover plate 400 and the light condensing unit 700 is arranged in the substrate in the color film substrate 200, so that the thickness of the display panel 20 is not increased due to the additional lens 800 and light condensing unit 700.

[0055] The light shielding unit 900 is arranged on the side of the substrate in the color film substrate 200 facing the cover plate 400, so that it is located between the light condensing unit 700 and the dispersion prism 600. In the embodiment, the original structure in the display panel 20 is used as the shielding unit, so that the process of the display panel 20 is saved and the thickness of the display panel 20 is not increased.

[0056] Of course, in other embodiments, the light condensing unit 700 can be adhered to the color film substrate 200 by optical glue, and the lens 800 can be adhered to the cover plate 400 by optical glue. Meanwhile, the positions of the dispersion prism 600, the lens 800 and the light condensing unit 700 in the display panel 20 can be adjusted.

[0057] In other embodiments, a light transmission hole can be arranged on the display panel 20, and a cylindrical structure is inserted into the light transmission hole, and the lens 800, the dispersion prism 600 and the light condensing unit 700 are arranged in the cylindrical structure. In the embodiment, the cylindrical structure and the lens 800, the dispersion prism 600 and the light condensing unit 700 inside the cylindrical structure can be designed independently, so that the lens 800, the dispersion prism 600 and the light condensing unit 700 can be adjusted in the design stage.

[0058] As shown in FIG. 6, the display panel 20 is provided with a light shielding unit 900. Figure 8As shown, the embodiment of the present application further provides a display device, which comprises a driving circuit 30 and the display panel 20 as described above, and the driving circuit 30 is used for driving the display panel 20. The driving circuit 30 is connected with the light sensor 500 and the data line in the display panel 20 at the same time, the light sensor 500 outputs the photocurrent according to the output of the ambient light, and the driving circuit 30 adjusts the current size of the data line in the display panel 20 according to the photocurrent output by the light sensor 500, and then adjusts the display brightness of the display panel 20, so as to achieve the design of adjusting the brightness of the display panel 20 according to the ambient light.

[0059] The above is a further detailed description of the present application in combination with specific optional embodiments, and it cannot be considered that the specific implementation of the present application is limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, some simple deductions or replacements can be made without departing from the concept of the present application, and all of them should be considered as belonging to the protection scope of the present application.

Claims

1. A display panel, characterized by, The display panel comprises: a display substrate; a light sensor disposed on the display substrate for sensing ambient light; a dispersion prism, which is a three-prism, disposed on a side of the light sensor away from the display substrate for dispersing ambient light into light of different wavelengths and forming a spectrum of light of different wavelengths; a light condensing unit disposed between the light sensor and the dispersion prism for condensing visible light dispersed by the dispersion prism into white light and condensing the white light to the light sensor; the display panel further comprises a light shielding unit disposed on a side of the dispersion prism facing the light condensing unit, the light shielding unit being used for shielding non-visible light dispersed by the dispersion prism; the light shielding unit comprises a first stopper and a second stopper, the first stopper and the second stopper being respectively disposed at two ends of the side of the dispersion prism facing the light condensing unit; the first stopper shields non-visible light with a wavelength smaller than that of visible light, and the second stopper shields non-visible light with a wavelength greater than that of visible light. The light shielding unit is a black coating applied on a surface of the dispersion prism.

2. The display panel of claim 1, wherein, The display panel further comprises a color filter substrate, an optical adhesive layer and a cover plate, the color filter substrate and the display substrate are disposed in a lute manner, the cover plate is disposed on a side of the color filter substrate away from the display substrate, and the cover plate and the color filter substrate are bonded by the optical adhesive layer; 3. The display panel of claim 1, wherein, the dispersion prism is disposed on the optical adhesive layer, and the light condensing unit and the light shielding unit are disposed on the color filter substrate; the light shielding unit is disposed in a non-display area of the color filter substrate, the light shielding unit is provided with an opening, and a normal projection of the light condensing unit and the light sensor on the display substrate is located within a normal projection range of the opening on the display substrate. A normal projection of a middle area of the dispersion prism on the display substrate is located within the normal projection range of the opening on the display substrate, and normal projections of two ends of the dispersion prism on the display substrate are located outside the normal projection range of the opening on the display substrate.

4. The display panel of claim 3, wherein, The display panel further comprises a lens disposed on a side of the dispersion prism away from the light condensing unit, the lens being a light condensing lens for condensing ambient light to the dispersion prism.

5. The display panel of claim 3, wherein, A normal projection of the lens on the display substrate covers a normal projection of the dispersion prism on the display substrate, and an area of the normal projection of the lens on the display substrate is greater than an area of the normal projection of the dispersion prism on the display substrate.

6. The display panel of claim 5, wherein, The lens is formed by local polishing of the cover plate, and the light condensing unit is formed by local polishing of a substrate in the color filter substrate.

7. The display panel of claim 5, wherein, The light condensing unit comprises a convex lens or a prism.

8. The display panel of claim 1, wherein, The display panel comprises a driving circuit and a display panel as claimed in any one of claims 1-8, the driving circuit being used for driving the display panel.

9. A display device, characterized by comprising: ​

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