Display panel

Abstract

The utility model provides a display panel. The display panel comprises an imaging assembly, the imaging assembly comprises a first side and a second side which are opposite to each other, content displayed by the imaging assembly can be obtained on the first side, the imaging assembly is provided with a first light inlet area, and the first light inlet area can be switched into a light inlet state; the backlight assembly is arranged on the second side and is used for providing a light source for the imaging assembly; the light receiving device is arranged on the side, opposite to the imaging assembly, of the backlight assembly, and in the light inlet state, the light receiving device can receive light transmitted from the first side to the second side. According to the technical scheme, the problem that in the prior art, a display panel with an under-screen camera is poor in imaging effect is solved.

Description

Technical Field

[0001] The utility model relates to the field of display panels, and specifically provides a display panel. Background Art

[0002] In the prior art, display panels with under-screen cameras are usually made of OLED structures. The gaps between OLED pixels are used to set under-screen cameras in low PPI areas so that the cameras can receive external light. However, the solutions in the prior art result in low screen production capacity and poor imaging effects of under-screen cameras.

[0003] Therefore, this field needs a new technical solution to solve the above problems. Utility Model Content

[0004] In order to solve the problem of poor imaging effect of display panels with under-screen cameras in the prior art, the utility model provides a display panel. The display panel of the utility model includes: an imaging component, the imaging component includes a first side and a second side opposite to each other, the content displayed by the imaging component can be acquired on the first side, the imaging component has a first light-entry area, and the first light-entry area can be switched to a light-entry state; a backlight component, the backlight component is arranged on the second side and is used to provide a light source to the imaging component; and a light receiving device, the light receiving device is arranged on a side of the backlight component opposite to the imaging component, and in the light-entry state, the light receiving device can receive light transmitted from the first side to the second side.

[0005] The display panel of the utility model includes an imaging component and a backlight component arranged on the second side of the imaging component. Under the irradiation of the light emitted by the backlight component, the imaging component can display content, and the displayed content can be observed on the first side. A first light intake area is provided on the imaging component, and the first light intake area can change its state from the original state to the light intake state. In the light intake state, the light receiving device can receive light transmitted from the first side through the first light intake area to the second side. By setting a special light intake state, the amount of light intake when the light receiving device needs to work is increased, and the quality of the picture finally collected by the light receiving device is optimized. At the same time, other areas on the display panel except the first light intake area are not affected.

[0006] In addition, by setting the guest-host liquid crystal element, the guest-host liquid crystal can change its form to achieve different display effects of the display panel. When the first light-incoming area is in the light-incoming state, the light can pass through the display device along the Z-axis direction, achieving the effect that the imaging component is in a transparent state, and the light receiving component can collect the light entering from the outside.

[0007] In the preferred technical solution of the display panel, the backlight assembly has a second light entrance area corresponding to the first light entrance area, and in the light entrance state, the light passes through the first light entrance area and the second light entrance area in sequence. By setting the second light entrance area, the light transmitted from the first side to the second side can be finally received by the light receiving device through the backlight assembly.

[0008] In the preferred technical solution of the above display panel, the backlight assembly includes a brightness enhancement sheet, a diffusion sheet and a light guide plate stacked in sequence toward the light receiving device, the second light inlet area extends from the brightness enhancement sheet to the light guide plate, wherein the light guide plate has a reflective area that does not intersect with the second light inlet area, and the reflective area is provided with light guide points. Light guide points for diverging light are usually formed on the light guide plate, and the light receiving property of the light receiving device is increased through the above arrangement.

[0009] In the preferred technical solution of the display panel, the reflective area has an edge portion adjacent to the second light-entering area, and the light-guiding dots on the edge portion are arranged from dense to sparse in a direction away from the second light-entering area. In a position where the light-guiding dots are not arranged, the uniformity of the backlight provided by the backlight assembly is affected, and the above arrangement complements the uniformity of the backlight provided by the backlight assembly.

[0010] In the preferred technical solution of the display panel, the light guide dots are formed on the side of the reflective area facing the diffuser, and the side of the reflective area facing the light receiving device is coated with a reflective film. By replacing the reflective sheet with the reflective film, the loss of light in the transparent substrate of the reflective sheet is reduced, thereby ensuring the quality of the image collected by the light receiving device.

[0011] In the preferred technical solution of the above-mentioned display panel, the first light-entering area also has a non-light-entering state, in which the long axis direction of the liquid crystal molecules of the first guest-host liquid crystal element is parallel to the X axis, and the long axis direction of the liquid crystal molecules of the second guest-host liquid crystal element is parallel to the Y axis. Through the above-mentioned setting, when the first light-entering area is in the non-light-entering state, the first guest-host liquid crystal element and the second guest-host liquid crystal element are equivalent to orthogonal polarizers, and only the light whose polarization direction has been changed by the display liquid crystal element can pass through the presentation component, so that when the light receiving component does not need to collect external images, when the first light-entering area is in the non-light-entering state, the entire imaging component can be fully used to display the picture.

[0012] In the preferred technical solution of the above display panel, in the non-light-receiving state, when the display liquid crystal element is turned on, the imaging component can display an image; when the display liquid crystal element is turned off, the light transmitted from the first side to the second side is blocked by the imaging component. Through the above arrangement, when the display panel does not need to display content, the light receiving device can be hidden on one side of the imaging device so that it is not observed or activated by light.

[0013] In the preferred technical solution of the above display panel, the first guest-host liquid crystal element, the display liquid crystal element and the second guest-host liquid crystal element are all configured as TFT pixel structures. Through the above arrangement, the imaging component can more conveniently distinguish the first light-entering area, so that the first light-entering area can be independently switched to the light-entering state.

[0014] In the preferred technical solution of the above display panel, the light receiving device is a camera. Through the above arrangement, the display panel can be applied to mobile phones and mobile terminals, and realize various functions by collecting images through the camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the display panel of the utility model when the first light-incoming area is in a non-light-incoming state;

[0017] Figure 2 It is a structural schematic diagram of an embodiment of the display panel of the utility model when the first light-incoming area is in a light-incoming state.

[0018] List of reference numerals:

[0019] 100. Display panel; 10. Imaging component; 11. First side; 12. Second side; 13. First guest-host liquid crystal element; 14. Display liquid crystal element; 15. Second guest-host liquid crystal element; 16. First light-entering area; 20. Backlight assembly; 21. Second light-entering area; 22. Brightness enhancement sheet; 23. Diffuser; 24. Light guide plate; 241. Reflective area; 2411. Edge; 25. Reflective film; 30. Light receiving device. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0021] It should be noted that, in the description of the present invention, the terms “first” and “second” are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In order to solve the problem of poor imaging effect of the display panel 100 with an under-screen camera in the prior art, the utility model provides a display panel 100. The display panel 100 of the utility model includes: an imaging component 10, the imaging component 10 includes a first side 11 and a second side 12 opposite to each other, the content displayed by the imaging component 10 can be obtained on the first side 11, the imaging component 10 has a first light-entry area 16, and the first light-entry area 16 can be switched to a light-entry state; a backlight component 20, the backlight component 20 is arranged on the second side 12 and is used to provide a light source to the imaging component 10; and a light receiving device 30, the light receiving device 30 is arranged on a side of the backlight component 20 opposite to the imaging component 10, and in the light-entry state, the light receiving device 30 can receive light transmitted from the first side 11 to the second side 12.

[0024] Figure 1 It is a schematic structural diagram of an embodiment of the display panel of the utility model when the first light-incoming area is in a non-light-incoming state; Figure 2 1 is a schematic diagram of the structure of the display panel of the utility model when the first light-incoming area is in the light-incoming state. Figure 1 As shown, the display panel 100 of the present invention includes an imaging assembly 10, a backlight assembly 20 and a light receiving device 30 arranged in sequence from top to bottom. The imaging assembly 10 includes a first side 11 and a second side 12 opposite to each other. Figure 1 In the illustrated orientation, the first side 11 faces the negative direction of the Z axis, and the second side faces the positive direction of the Z axis. The "X axis", "Y axis" and "Z axis" mentioned in this specification are only used for illustration and do not constitute a limitation on the orientation of the display panel 100.

[0025] In one or more embodiments, the imaging component 10 includes a first guest-host liquid crystal element 13, a display liquid crystal element 14, and a second guest-host liquid crystal element 15 stacked in sequence along the Z-axis direction. In the guest-host liquid crystal, the host is a liquid crystal molecule, and the guest is a dye molecule. The dye molecule controls the degree of light absorption according to the deflection of the liquid crystal. The dye molecule is linear and parallel to the long axis of the liquid crystal molecule. When polarized light passes through the guest-host liquid crystal, when the polarization direction of the polarized light is parallel to the long axis direction of the liquid crystal molecule, the polarized light is absorbed by the dye; when the polarization direction of the polarized light is perpendicular to the long axis direction of the liquid crystal molecule, the polarized light can pass through the guest-host liquid crystal. In other words, the guest-host liquid crystal can be regarded as a controllable polarizer. Alternatively, the first guest-host liquid crystal element 13 and the second guest-host liquid crystal element 15 can also be configured as other components that can realize the function of switching between light transmission and polarization.

[0026] Continue reading Figure 1 and Figure 2 In one or more embodiments, the first guest-host liquid crystal element 13 is configured in a VA switching mode, and its initial orientation is perpendicular to the substrate, that is, when no voltage is applied to the first guest-host liquid crystal element 13, the long axis direction of the liquid crystal molecules is perpendicular to the substrate (based on Figure 2 In the orientation shown, the long axis direction of the liquid crystal molecules in the first light-entry area 16 is parallel to the Z axis), and the light perpendicular to the substrate direction of the first guest-host liquid crystal element 13 can pass through the first guest-host liquid crystal element 13. The pre-tilt angle of the liquid crystal molecules in the first guest-host liquid crystal element 13 is configured to be biased toward the X axis, so that after the first guest-host liquid crystal element 13 is applied with a voltage, the dye liquid crystal molecules can be changed from being perpendicular to the substrate to being parallel to the substrate (based on Figure 1 and Figure 2 In the orientation shown, the long axis of the liquid crystal molecules is parallel to the X axis), at this time, only the light with the polarization direction perpendicular to the long axis of the liquid crystal molecules can pass through the first guest-host liquid crystal element 13. After the voltage is removed, the first guest-host liquid crystal element 13 can still restore the initial alignment, that is, parallel to the Z axis.

[0027] Continue reading Figure 1 and Figure 2 In one or more embodiments, the second guest-host liquid crystal element 15 is configured in a VA switching mode, and its initial alignment is also configured to be perpendicular to the substrate, that is, when no voltage is applied to the second guest-host liquid crystal element 15, the long axis direction of the liquid crystal molecules is perpendicular to the substrate (based on Figure 2 In the orientation shown, the long axis direction of the liquid crystal molecules in the first light-entry area 16 is parallel to the Z axis), and the light perpendicular to the substrate direction of the second guest-host liquid crystal element 15 can pass through the second guest-host liquid crystal element 15. The pre-tilt angle of the liquid crystal molecules in the second guest-host liquid crystal element 15 is configured to be biased toward the Y axis, so that after the second guest-host liquid crystal element 15 is applied with a voltage, the liquid crystal molecules can be turned from perpendicular to the substrate to parallel to the substrate (based on Figure 1 and Figure 2In the orientation shown, the long axis of the liquid crystal molecules is parallel to the Y axis, which is perpendicular to the paper plane), and at this time, only light with a polarization direction perpendicular to the long axis of the liquid crystal molecules can pass through the second guest-host liquid crystal element 15. After the voltage is removed, the second guest-host liquid crystal element 15 can still restore the initial alignment, that is, parallel to the Z axis.

[0028] Continue reading Figure 1 and Figure 2 In one or more embodiments, the display liquid crystal element 14 is configured as a TN type. The display liquid crystal element 14 can be switched between a display state and a non-display state by applying a voltage and removing the voltage. In one or more embodiments, the liquid crystal display element is bonded to the first polarized light processing element and the second polarized light processing element respectively by optical glue. The optical glue includes but is not limited to OCA, OCR, etc.

[0029] like Figure 2 As shown, the imaging assembly 10 includes a first light-entering area 16, and the first light-entering area 16 extends from the first guest-host liquid crystal element 13 to the second guest-host liquid crystal element 15. The first light-entering area 16 can be switched to a light-entering state. Figure 1 As shown, in one or more embodiments, the first guest-host liquid crystal element 13, the second guest-host liquid crystal element 15 and the display liquid crystal element 14 are all configured as a TFT pixel structure to facilitate fine control of the display effect of the display panel 100 by partition. Exemplarily, the long axis directions of the liquid crystal molecules of the first guest-host liquid crystal element 13 and the second guest-host liquid crystal element 15 are perpendicular to each other, the display liquid crystal element 14 is in a display state, and the backlight irradiates the imaging component 10 to enable the imaging component 10 to display an image. At this time, the light receiving device 30 cannot collect external light in the first light input area 16. Figure 2 As shown, when the first light-entry area 16 is switched to the light-entry state, the voltage applied to the first guest-host liquid crystal element 13, the display liquid crystal element and the second guest-host liquid crystal element 15 in the first light-entry area 16 is removed, and the liquid crystal molecules are restored to their initial alignment. At this time, the light receiving device 30 can collect external light. At the same time, other areas of the imaging component 10 except the first light-entry area 16 can still display content normally.

[0030] In one or more embodiments, the backlight assembly 20 includes a second light inlet area 21 corresponding to the first light inlet area 16, so that external light can be collected by the light receiving device 30 through the first light inlet area 16 and the second light inlet area 21 in sequence. In one or more embodiments, the backlight assembly 20 includes a brightness enhancement sheet 22, a diffuser 23, and a light guide plate 24 stacked in sequence from the imaging assembly 10 toward the light receiving device 30. Among them, the brightness enhancement sheet 22, the diffuser 23, and the light guide plate 24 are all light-transmissive and will not block external light. The second light inlet area 21 extends from the brightness enhancement sheet 22 to the light guide plate 24. The brightness enhancement sheet 22 may include a BEF (having a prism structure for enhancing brightness) and a DBEF (reflective polarizer), and may also include a DBEF. The diffuser 23 is used to provide a uniform surface light source for the imaging assembly 10. In one or more embodiments, the backlight module includes a side light source, and the light guide plate 24 has a reflective area 241 that does not intersect with the second light inlet area 21. Light-guiding points are formed on the side of the reflective area 241 facing the diffuser 23, and a reflective film 25 is plated on the side of the reflective area 241 facing the light receiving device 30. The light-guiding points are used to guide the scattering direction of the light emitted by the side light source and ensure the uniformity of the brightness. The light-guiding points have a divergent effect; the reflective film 25 is used to ensure that all the light emitted by the side light source is provided to the imaging component 10. Therefore, in order to reduce the influence of the light-guiding points on the light receiving device 30 collecting external light, the light-guiding points are only set in the second light-entry area 21. In order to prevent the reflective film 25 from reflecting external light to other places, the reflective film 25 is not set in the second light-entry area 21. In one or more embodiments, the reflective film 25 can also be replaced by a reflective sheet, and a hole needs to be opened at the position of the reflective sheet corresponding to the second light-entry area to ensure the passage of light.

[0031] In one or more embodiments, the reflective area 241 has an edge portion 2411 adjacent to the second light input area 21, and the light guide points on the edge portion 2411 are arranged from dense to sparse in the direction of the second light input area 21, so as to compensate for the influence caused by the absence of light guide points in the second light input area 21 and ensure the uniformity of the backlight.

[0032] In one or more embodiments, the light receiving device 30 can be configured as a camera to facilitate the application of the display panel 100 on mobile phones, computers and mobile terminals. When the first light inlet area 16 is switched to the light inlet state, mobile terminals such as mobile phones can enter the under-screen camera mode and obtain images outside the mobile phone through the camera. After the shooting is completed, the first light inlet area 16 can also be restored to its original state, for example, to the state where the imaging component 10 displays content, or to the state where the imaging component 10 does not display content and presents a black screen. Alternatively, the light receiving device 30 can also be configured as other suitable optical elements according to actual conditions, so that it can be hidden behind the imaging component 10 and can also collect external light in a specific mode.

[0033] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A display panel, characterized in that: The display panel comprises: An imaging component, the imaging component comprising a first side and a second side opposite to each other, the content displayed by the imaging component can be acquired on the first side, the imaging component has a first light-entering area, and the first light-entering area can be switched to a light-entering state; a backlight assembly disposed on the second side and configured to provide light to the imaging assembly; and a light receiving device, the light receiving device being arranged on a side of the backlight assembly opposite to the imaging assembly, and in the light receiving state, the light receiving device can receive light transmitted from the first side to the second side; The imaging assembly comprises a first guest-host liquid crystal element, a display liquid crystal element, and a second guest-host liquid crystal element stacked in sequence, wherein the first guest-host liquid crystal element faces the first side, the second guest-host liquid crystal element faces the second side, and the first light-entry area extends from the first guest-host liquid crystal element to the second guest-host liquid crystal element; In the light-entering state of the first light-entering zone, the long-axis direction of the liquid crystal molecules of the first guest-host liquid crystal element is parallel to the Z axis, and the long-axis direction of the liquid crystal molecules of the second guest-host liquid crystal element is also parallel to the Z axis, so that when the display liquid crystal element remains closed, the light can enter the second side from the first side through the first light-entering zone.

2. The display panel according to claim 1, characterized in that: The backlight assembly has a second light entrance area corresponding to the first light entrance area. In the light entrance state, the light passes through the first light entrance area and the second light entrance area in sequence.

3. The display panel according to claim 2, characterized in that: The backlight assembly includes a brightness enhancement sheet, a diffusion sheet and a light guide plate stacked in sequence from the imaging assembly toward the light receiving device, and the second light input area extends from the brightness enhancement sheet to the light guide plate, wherein the light guide plate has a reflective area that has no intersection with the second light input area, and light guide dots are provided on the reflective area.

4. The display panel according to claim 3, characterized in that: The light reflecting area has an edge portion adjacent to the second light entering area, and the light guiding dots on the edge portion are in a state of decreasing from dense to sparse in a direction away from the second light entering area.

5. The display panel according to claim 3, characterized in that: The light-guiding grid points are formed on a side of the light-reflecting area facing the diffusion sheet, and a side of the light-reflecting area facing the light-receiving device is coated with a reflective film.

6. The display panel according to claim 1, characterized in that: The first light-entering area also has a non-light-entering state. In the non-light-entering state, the long axis direction of the liquid crystal molecules of the first guest-host liquid crystal element is parallel to the X-axis, and the long axis direction of the liquid crystal molecules of the second guest-host liquid crystal element is parallel to the Y-axis.

7. The display panel according to claim 6, characterized in that: In the non-light-incoming state, when the display liquid crystal element is turned on, the imaging component can display an image; when the display liquid crystal element is turned off, the light transmitted from the first side to the second side is blocked by the imaging component.

8. The display panel according to claim 1, characterized in that: The first guest-host liquid crystal element, the display liquid crystal element and the second guest-host liquid crystal element are all configured into a TFT pixel structure.

9. The display panel according to claim 1, characterized in that: The light receiving device is a camera.

Images