Display device and method of manufacturing a display device

Abstract

A display device and a preparation method thereof. The display device comprises a display panel (100) and a time-of-flight (TOF) sensor (10) arranged on a side of the display panel (100) away from a display surface (110); detection light received by the TOF sensor (10) can pass through a target light-transmitting region (120) of the display panel (100); and a light reflection interference layer (130) is arranged on a surface of the target light-transmitting region (120) of the display panel (100) and faces the TOF sensor (10); the light reflection interference layer (130) is used for adjusting a transmission direction of reflected light of the detection light reflected between the display panel (100) and a lens (101) of the TOF sensor (10).

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display device and a method for manufacturing the display device. Background Technology

[0002] To adapt to market demands, the front-facing camera is hidden directly beneath the display screen, creating a full-screen display effect and achieving a perfect combination of full-screen display and photography, which has become the current trend in display device development.

[0003] In addition, facial recognition technology has become a basic structural function of current display devices. Among them, facial recognition technology includes 3D structured light and time-of-flight (TOF) ranging methods. Compared with the 3D structured light method, the TOF ranging method has the advantages of long detection distance, simple structure, and smaller spacing, which can effectively reduce the screen ratio, and is widely used in full-screen display devices.

[0004] However, in display devices employing a TOF ranging structure, an air gap layer, thinner at the center and thicker at the edges, is formed between the lens and the display panel on the TOF ranging structure's light emitter. After the light emitted by the light emitter is reflected and refracted by the lens and the display panel, the reflected light on both sides of the air gap layer forms coherent light. The optical path difference between the two beams is related to the thickness of the air layer at that location. As the thickness of the air gap changes, dark fringes appear where the interference is destructive, and bright fringes appear where the interference is constructive, resulting in the Newton's rings phenomenon, which affects the accuracy of TOF imaging. Summary of the Invention

[0005] The purpose of this disclosure is to provide a display device and a method for manufacturing the display device, thereby solving the problem that the facial recognition image of a display device using a TOF ranging structure will produce Newton's rings, affecting the accuracy of imaging.

[0006] One embodiment of this disclosure provides a display device, comprising:

[0007] The display panel and the time-of-flight (TOF) sensor disposed on the side of the display panel opposite to the display surface;

[0008] The detection light received by the TOF sensor can pass through the target light-transmitting area of ​​the display panel;

[0009] In this embodiment, a light reflection interference layer is provided on the surface of the target light-transmitting area of ​​the display panel facing the TOF sensor;

[0010] The light reflection interference layer is used to adjust the transmission direction of the reflected light from the detection light reflected between the display panel and the lens of the TOF sensor.

[0011] Optionally, the light reflection interference layer is configured to make the received reflected light directly penetrate.

[0012] Optionally, the light reflection interference layer is configured to make the received reflected light scattered.

[0013] Optionally, a transparent substrate is arranged on a side of the display panel away from the display surface, and the light reflection interference layer is arranged on the transparent substrate.

[0014] Optionally, the light reflection interference layer has a second refractive index n2, and the transparent substrate has a first refractive index n1, and the second refractive index n2 is less than the first refractive index n1.

[0015] Optionally, the first refractive index n1 and the second refractive index n2 satisfy the following relationship:

[0016] n2 = (n1*n)^(1 / 2);

[0017] wherein n is the refractive index of air.

[0018] Optionally, the thickness of the light reflection interference layer is between 1 / 5 and 2 / 5 of the wavelength of the detection light.

[0019] Optionally, the light reflection interference layer is made of MgF2 or SiO2.

[0020] Optionally, the light reflection interference layer is formed as a rough surface layer.

[0021] Optionally, the light reflection interference layer covers the entire surface of the side of the display panel away from the display surface.

[0022] Optionally, the target light transmission region is provided with pixel units, and the pixel units provided on the target light transmission region and the pixel units provided on other display regions of the target light transmission region satisfy at least one of the following relationships:

[0023] The pixel units provided on other display regions of the target light transmission region include light emitting units and driving circuits arranged in layers, and the pixel units provided on the target light transmission region only include light emitting units.

[0024] The distribution density of the pixel units provided on the target light transmission region is less than the distribution density of the pixel units provided on other display regions of the target light transmission region.

[0025] The area occupied by each pixel unit provided on the target light transmission region is less than the area occupied by each pixel unit provided on other display regions of the target light transmission region.

[0026] Optionally, the display device further comprises:

[0027] a camera disposed on a side of the display panel away from the display surface;

[0028] wherein a normal projection of the camera on the display panel is located within the target light-transmissive region.

[0029] One embodiment of the present disclosure further provides a preparation method for the display device according to any one of the above, wherein the method comprises:

[0030] manufacturing a display panel;

[0031] manufacturing a light reflection interference layer on a side surface of the target light-transmissive region of the display panel away from the display surface;

[0032] disposing a TOF sensor on a side of the display panel away from the display panel, and the detection light of the TOF sensor can be transmitted through the target light-transmissive region of the display panel.

[0033] Optionally, when the light reflection interference layer is made of MgF2 or SiO2, the light reflection interference layer is manufactured by vacuum plating or ion plasma enhanced chemical vapor deposition.

[0034] Optionally, when the light reflection interference layer is formed as a rough surface layer, the light reflection interference layer is manufactured by surface fogging or pasting an anti-glare scattering film. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the related art, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0036] Figure 1 a schematic diagram of the working principle structure of the TOF sensor;

[0037] Figure 2 a schematic diagram of the principle of generating Newton's ring by using the TOF sensor;

[0038] Figure 3 a schematic diagram of the cross-sectional structure of the display device according to one embodiment of the present disclosure;

[0039] Figure 4 a schematic diagram of the planar structure of the display device according to one embodiment of the present disclosure;

[0040] Figure 5A schematic diagram showing comparison of light transmission of the display device according to an embodiment of the present disclosure with prior art;

[0041] Figure 6 A schematic diagram showing comparison of light transmission of the display device according to another embodiment with prior art;

[0042] Figure 7 A schematic diagram showing a flow of a method for manufacturing the display device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present disclosure will be clearly and completely described with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present disclosure.

[0044] The embodiments of the present disclosure provide a display device, which uses a TOF sensor to perform face recognition and / or image acquisition. Specifically, as shown in Figure 1 The TOF sensor 10 can include a transmitter TX 11 and a receiver RX 12. The transmitter 11 transmits modulated detection light, and the receiver 12 receives the detection light. The distance D from the measured object to the TOF sensor is measured by using the time-of-flight difference between the transmitted detection light and the received detection light, and the three-dimensional topography of the measured object is drawn.

[0045] Optionally, the detection light can be, but is not limited to, only infrared light with a wavelength of 940 nm.

[0046] When applied to a display device, as shown in Figure 1 The TOF sensor 10 is arranged on one side of the display panel 100. The detection light emitted by the transmitter TX 11 transmits through the display panel 100 to the measured object on the other side of the display panel 100, and then transmits through the display panel 100 to the receiver RX 12 after being reflected by the measured object. In order to realize face recognition or image acquisition, the transmitter TX 11 and the receiver RX 12 need to be kept synchronous, and the receiver RX 12 can detect the transmission time of the detection light emitted by the transmitter TX 11. On this basis, the processor of the display device can analyze and obtain the three-dimensional topography of the measured object within a preset distance range from the display panel 100 according to the transmission time detected by the receiver RX 12.

[0047] In the display device provided with the TOF sensor 10, the lens of the receiver RX 12 is usually a curved structure, as shown in Figure 2As shown, an air gap layer, thinner at the center and thicker at the edges, is formed between the receiver RX 12 and the display panel 100. After reflection and refraction through the lens of the receiver RX 12 and the display panel 100, the reflected light incident on the lens forms coherent light. As the thickness of the air gap changes, dark fringes appear where the interference is destructive, and bright fringes appear where the interference is constructive, i.e., the Newton's rings phenomenon occurs, affecting the accuracy of TOF imaging.

[0048] To solve the above-mentioned technical problems, this disclosure provides a display device. By providing a light reflection interference layer on the surface of the display panel away from the display surface, the light reflection interference layer is used to adjust the transmission direction of reflected light between the display panel and the lens of the TOF sensor 10, so as to avoid the TOF sensor 10 receiving coherent light and thus avoiding the Newton's rings phenomenon.

[0049] Specifically, the display device described in the embodiments of this disclosure, such as Figure 3 and Figure 4 As shown, it includes:

[0050] Display panel 100 and time-of-flight (TOF) sensor 10 disposed on the side of display panel 100 opposite to display surface 110;

[0051] The detection light received by the TOF sensor 10 can pass through the target light-transmitting area 120 of the display panel 100;

[0052] Among them, a light reflection interference layer 130 is provided on the surface 121 of the target light-transmitting area 120 of the display panel 100 facing the TOF sensor 10;

[0053] The light reflection interference layer 130 is used to adjust the transmission direction of the reflected light reflected between the display panel 100 and the lens of the TOF sensor 10, so that the reflectivity of the reflected light on the light reflection interference layer 130 is within a set range, ensuring that the reflected light received by the TOF sensor is not coherent light.

[0054] It should be noted that the light reflection interference layer 130 is used to reduce interference light generated by the reflected light between the display panel 100 and the lens of the TOF sensor 10. Correspondingly, with reduced interference light, the reflectivity of the reflected light received by the TOF sensor 10 decreases. The aforementioned setting range is the numerical range of the reflectivity of the detected reflected light that ensures the reflected light received by the TOF sensor 10 does not contain interference light, preventing the TOF sensor from exhibiting Newton's rings phenomenon. This range can be obtained through experimental testing. Optionally, the reflectivity of the incident light incident on the light reflection interference layer 130 can be detected using a reflectivity testing tool. The reflectivity is the ratio of the reflected light intensity to the incident light intensity. Experimental measurements show that, while ensuring the reflected light received by the TOF sensor is not coherent, the reflectivity of the reflected light on the light reflection interference layer 130 should be less than or equal to 1%, i.e., the setting range is greater than zero and less than or equal to 1%.

[0055] Combination Figure 2 and Figure 3 As shown, in the display device equipped with the TOF sensor 10, the detection light emitted by the transmitter of the TOF sensor 10 is reflected by the object being measured. The reflected detection light then passes through the target light-transmitting area 120 of the display panel 100 and is transmitted to the receiver RX 12 of the TOF sensor 10. Specifically, when the detection light reflected by the object is transmitted to the receiver RX 12 of the TOF sensor 10, a portion of the reflected detection light is reflected between the display panel 100 and the first lens 101 of the TOF sensor 10, forming a first reflected light ray a. The first reflected light ray a passes sequentially through the first lens 101 and the second lens 102 of the TOF sensor 10 and is received by the receiver of the TOF sensor 10. A portion of the reflected detection light is reflected between the first lens 101 and the second lens 102 of the TOF sensor 10, forming a second reflected light ray b. The second reflected light ray b passes through the second lens 102 and is received by the receiver of the TOF sensor 10. When no light reflection interference layer 130 is provided on the surface 121 of the target light-transmitting area 120 facing the TOF sensor 10, since there is an air gap layer between the display panel 100 and the first lens 101 of the TOF sensor 10 that is thin in the center and thick at the edges, the first reflected light a and the second reflected light b form coherent light, and the optical path difference between the two beams is related to the thickness of the air gap layer at the location. As the thickness of the air gap layer changes, dark fringes appear where the interference cancels out and bright fringes appear where the interference is constructive, i.e., the Newton's rings phenomenon occurs.

[0056] In response to the cause of the Newton's rings phenomenon, in one embodiment of the display device described in this disclosure, the light reflection interference layer 130 is formed as an anti-reflection and anti-reflection film layer, which allows the received reflected light to pass through directly.

[0057] Specifically, by providing a light reflection interference layer 130, which is formed as an anti-reflection and anti-reflection film, on the surface 121 of the target light-transmitting region 120 facing the TOF sensor 10, the reflected light incident on the light reflection interference layer 130 is destructively interfered by utilizing the equal inclination interference between the film layers, thereby achieving the anti-reflection effect. Figure 5 As shown.

[0058] A transparent substrate is provided on the side of the display panel 100 that is away from the display surface 110, and a light reflection interference layer 130 is provided on the transparent substrate.

[0059] The second refractive index n2 of the light reflection interference layer 130 is less than the first refractive index n1 of the transparent substrate.

[0060] The display device described in this embodiment can reduce the reflection effect by making the second refractive index n2 of the light reflection interference layer 130 smaller than the first refractive index n1 of the transparent substrate, thereby causing the reflected light incident on the light reflection interference layer 130 to interfere and cancel each other out.

[0061] According to the principle of single-layer antireflection film, when the refractive index of the optical film layer set on the glass substrate is less than the refractive index of the glass substrate, the reflectance of the optical film layer is less than the reflectance of the glass substrate, thus achieving the effect of reducing reflection and increasing light transmittance.

[0062] Specifically, the first refractive index n1 and the second refractive index n2 satisfy the following relationship:

[0063] n2 = (n1 * n)^(1 / 2);

[0064] Where n is the refractive index of air.

[0065] That is, when the first refractive index n1 and the second refractive index n2 satisfy the above relationship, the reflectivity of the glass substrate with the light reflection interference layer 130 is zero, which plays the role of full anti-reflection.

[0066] In this embodiment of the disclosure, optionally, the thickness of the light reflection interference layer 130 is between 1 / 5 and 2 / 5 of the wavelength of the detection light.

[0067] Optionally, the thickness of the light reflection interference layer 130 is 1 / 4 of the wavelength of the detection light. This ensures that when the reflected light is reflected and transmitted inside the glass substrate on which the light reflection interference layer 130 is provided, the optical path difference shifts by half a wavelength after reflection, thereby achieving destructive interference of the reflection.

[0068] Optionally, the detection light emitted by the TOF sensor 10 is infrared light with a wavelength of 940nm. Therefore, in this embodiment, the thickness of the light reflection interference layer 130 can be 235nm.

[0069] For example, taking a glass substrate with a first refractive index n1 of 1.945 and an air refractive index n of 1.00027 as an example, according to the above relationship, when the light reflection interference layer 130 has a second refractive index n2 of 1.395, and more preferably, when the thickness of the light reflection interference layer 130 is 235nm, the best anti-reflection and anti-reflection effect can be achieved, thereby greatly reducing equal-thickness interference and eliminating the Newton's rings phenomenon.

[0070] Based on the above, optionally, when the first refractive index n1 of the glass substrate is 1.945 and the detection light emitted by the TOF sensor 10 is infrared light, the material used to make the light reflection interference layer 130 can be MgF2. The refractive index of MgF2 is 1.374. Compared with other materials, its refractive index is closer to the second refractive index n2 calculated using the above relationship, which is 1.395, thus achieving the maximum anti-reflection and anti-reflection effect.

[0071] In this embodiment of the disclosure, when the material used to make the light reflection interference layer 130 is MgF2, the light reflection interference layer 130 may optionally be made on the glass substrate of the display panel 100 facing the TOF sensor 10 by vacuum deposition.

[0072] In another embodiment of the display device described in this disclosure, the material used to fabricate the light reflection interference layer 130 can be SiO2. When the detection light emitted by the TOF sensor 10 is infrared light, the thickness of the light reflection interference layer 130 is 235 nm. When the detection light emitted by the TOF sensor 10 is infrared light, the refractive index of SiO2 is 1.452. Given that the first refractive index n1 of the glass substrate on which the light reflection interference layer 130 is disposed is 1.945, the refractive index of the light reflection interference layer 130 is also relatively close to the second refractive index n2 calculated using the above-mentioned formula, which is 1.395. This significantly reduces interference cancellation, decreases infrared light reflection, and improves the Newton's rings phenomenon.

[0073] In this embodiment of the disclosure, when the material used to make the light reflection interference layer 130 is SiO2, the light reflection interference layer 130 may optionally be made on the glass substrate of the display panel 100 facing the TOF sensor 10 by plasma-enhanced chemical vapor deposition (PECVD).

[0074] In another embodiment of the display device described in this disclosure, the light reflection interference layer 130 can also be used to adjust the transmission direction of the reflected light between the display panel 100 and the lens of the TOF sensor 10 by scattering the received reflected light. Figure 6As shown, the reflected light received by the TOF sensor 10 is not coherent light.

[0075] Specifically, when the above-described embodiment is adopted, the light reflection interference layer 130 is formed as a rough surface layer. By forming a rough surface layer including multiple concave and convex structures, the incident reflected light is scattered, that is, diffuse reflection is formed.

[0076] Specifically, a rough surface layer can be formed on the glass substrate of the display panel 100 facing the TOF sensor 10 by atomization, forming a light reflection interference layer 130.

[0077] Optionally, in the display device described in this embodiment, the light reflection interference layer 130 may be fabricated only within the target light-transmitting area 120 on the glass substrate of the display panel 100 facing the TOF sensor 10. As long as the light reflection interference layer can be configured to adjust the transmission direction of reflected light between the display panel 100 and the lens of the TOF sensor 10, so as to eliminate or reduce the equal thickness interference occurring on the lens surface and improve the effect of Newton's rings phenomenon, it is acceptable.

[0078] Optionally, to simplify the process and manufacturing method, the light reflection interference layer 130 covers the entire surface of the display panel 100 on the side away from the display surface, that is, the light reflection interference layer 130 is made on the entire surface of the glass substrate on the side of the display panel 100 facing the TOF sensor 10.

[0079] The display device described in the embodiments of this disclosure may optionally, as... Figure 4 As shown, pixel units are provided on the target light-transmitting area 120 to form a light-transmitting display area.

[0080] Furthermore, optionally, such as Figure 4 As shown, the display device further includes:

[0081] A camera 20 is disposed on the side of the display panel 100 opposite to the display surface;

[0082] The orthographic projection of the camera 20 onto the display panel 100 is located within the target light-transmitting area 120.

[0083] Based on the above embodiments, the display device has a full-screen display effect, and the TOF sensor 10 can collect the detection light of the three-dimensional shape of the object being measured through part of the display area (that is, the target light-transmitting area) of the display screen to perform face recognition and / or image acquisition.

[0084] Optionally, the camera 20 is also positioned directly below the target's light-transmitting area, through which the camera 20 collects image information.

[0085] Optionally, such as Figure 4 As shown, the target light-transmitting area 120 of the display panel 100 is formed as a first display area, and the display panel 100 also includes a second display area surrounding the target light-transmitting area 120. The second display area and the first display area are combined to form the entire display area of ​​the display panel 100.

[0086] Optionally, the target light-transmitting area 120 is positioned near the upper edge of the display panel 100.

[0087] In addition, in order to achieve light transmission and display in the target light-transmitting area 120, the display panel 100 can be an OLED display panel, and the pixel units set on the target light-transmitting area 120 are made of light-transmitting material.

[0088] To ensure the light transmission function of the target light-transmitting area 120, the pixel units set in the target light-transmitting area 120 (i.e., the first display area) can be different from the pixel units set in the normal display area (i.e., the second display area) other than the target light-transmitting area 120.

[0089] The pixel unit settings in the first region and the pixel unit settings in the second region satisfy at least one of the following rules:

[0090] The pixel unit in the second display area includes a stacked light-emitting unit and a driving circuit, while the pixel unit in the first display area only includes a light-emitting unit.

[0091] The distribution density of pixel units set on the first display area is less than the distribution density of pixel units set on other display areas on the second display area;

[0092] The area occupied by each pixel unit in the first display area is smaller than the area occupied by each pixel unit in the second display area.

[0093] For example, in one embodiment, the pixel unit disposed on the second display area includes OLED light-emitting units and driving circuits stacked together; while the pixel unit disposed on the first display area may only include OLED light-emitting units, without the driving circuits of the OLED light-emitting units. The driving circuits may be disposed in the edge area of ​​the display panel 100 and connected to the corresponding OLED light-emitting units through connecting leads.

[0094] In another embodiment, the pixel units disposed on the first display area and the pixel units disposed on the second display area can both include OLED light-emitting units and driving circuits, but the distribution density of the pixel units in the first display area, which is also the target light-transmitting area 120, is less than the distribution density of the pixel units in the second display area.

[0095] In another embodiment, the pixel units disposed on the first display area and the pixel units disposed on the second display area can both include OLED light-emitting units and driving circuits. The distribution density of the pixel units in the first display area, which is also the target light-transmitting area 120, is equal to the distribution density of the pixel units in the second display area, but the area occupied by each pixel unit in the first display area is smaller than the area occupied by each pixel unit in the second display area.

[0096] Using the display device described in this embodiment, in a full-screen display device with a TOF sensor, by setting a light reflection interference layer on the surface of the display panel away from the display surface, the transmission direction of reflected light between the display panel and the lens of the TOF sensor can be adjusted by the light reflection interference layer, thereby eliminating or reducing the equal thickness interference occurring on the lens surface and improving the Newton's rings phenomenon.

[0097] This disclosure also provides a method for manufacturing a display device as described in any of the preceding embodiments, such as... Figure 7 As shown, and in combination Figures 1 to 6 The method includes:

[0098] S710, used for manufacturing display panels;

[0099] S720, a light reflection interference layer is formed on the side surface of the target light-transmitting area of ​​the display panel that is away from the display surface;

[0100] S730, a TOF sensor is provided on the side of the display panel away from the display panel, and the detection light of the TOF sensor can be transmitted through the target light-transmitting area of ​​the display panel.

[0101] In the display device fabricated using the preparation method described above, the light reflection interference layer is used to adjust the transmission direction of the reflected light reflected between the display panel and the lens of the TOF sensor, thereby eliminating or reducing the equal thickness interference occurring on the lens surface and improving the Newton's rings phenomenon.

[0102] Optionally, in the preparation method, when the material of the light reflection interference layer is MgF2 or SiO2, the light reflection interference layer is prepared by vacuum deposition or ion-enhanced chemical vapor deposition.

[0103] Optionally, in the preparation method, when the light reflection interference layer is formed as a rough surface layer, the light reflection interference layer can be made by surface atomization or by applying an anti-glare (AG) scattering film.

[0104] Combination Figures 1 to 6 Those skilled in the art should be able to understand the specific process of the manufacturing method of the display device described in the embodiments of this disclosure, which will not be described in detail here.

[0105] The above descriptions are some embodiments of this disclosure. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles described in this disclosure, and these improvements and modifications should also be considered within the scope of protection of this disclosure.

Claims

1. A display device, wherein, include: The display panel and the time-of-flight (TOF) sensor disposed on the side of the display panel opposite to the display surface; The detection light received by the receiver of the TOF sensor can pass through the target light-transmitting area of ​​the display panel, and the surface of the receiver that receives the detection light has a curved structure. In this embodiment, a light reflection interference layer is disposed on the surface of the target light-transmitting area of ​​the display panel facing the TOF sensor; and a transparent substrate is disposed on the side of the display panel away from the display surface, with the transparent substrate facing the TOF sensor, and the light reflection interference layer is disposed on the transparent substrate. The light reflection interference layer is used to adjust the transmission direction of the reflected light reflected between the display panel and the lens of the TOF sensor, so that the reflectivity of the reflected light on the light reflection interference layer is less than or equal to 1%; wherein, the light reflection interference layer is an anti-reflection and anti-reflection film layer, used to allow the received reflected light to pass through directly; or, the light reflection interference layer is a rough surface layer, used to cause the received reflected light to scatter.

2. The display device according to claim 1, wherein, in, The second refractive index n2 of the light reflection interference layer is less than the first refractive index n1 of the transparent substrate.

3. The display device according to claim 2, wherein, The first refractive index n1 and the second refractive index n2 satisfy the following relationship: n2 = (n1 * n)^(1 / 2); Where n is the refractive index of air.

4. The display device according to any one of claims 1 to 3, wherein, The thickness of the light reflection interference layer is between 1 / 5 and 2 / 5 of the wavelength of the detection light.

5. The display device according to any one of claims 1 to 3, characterized in that, The light reflection interference layer is made of magnesium fluoride (MgF2) or silicon dioxide (SiO2).

6. The display device according to claim 1, wherein, The light reflection interference layer covers the entire surface of the display panel on the side opposite to the display surface.

7. The display device according to claim 1, wherein, The target light-transmitting area is provided with pixel units, and the arrangement structure of the pixel units provided on the target light-transmitting area and the pixel units provided in other display areas on the target light-transmitting area satisfies at least one of the following relationships: The pixel units set in other display areas on the target light-transmitting area include stacked light-emitting units and driving circuits, while the pixel units set in the target light-transmitting area only include light-emitting units. The distribution density of pixel units set on the target light-transmitting area is less than the distribution density of pixel units set on other display areas on the target light-transmitting area; The area occupied by each pixel unit set on the target light-transmitting area is smaller than the area occupied by each pixel unit set in other display areas on the target light-transmitting area.

8. The display device according to claim 1, wherein, The display device further includes: A camera is located on the side of the display panel opposite to the display surface; The camera's orthogonal projection onto the display panel is located within the target's light-transmitting area.

9. A method for manufacturing the display device according to any one of claims 1 to 8, wherein, The method includes: Create a display panel; The light reflection interference layer is formed on the surface of the target light-transmitting area of ​​the display panel that is away from the display surface; A TOF sensor is installed on the side of the display panel away from the display panel, and the detection light of the TOF sensor can be transmitted through the target light-transmitting area of ​​the display panel.

10. The preparation method according to claim 9, wherein, When the material of the light reflection interference layer is MgF2 or SiO2, the light reflection interference layer is fabricated by vacuum deposition or ion-enhanced chemical vapor deposition.

11. The preparation method according to claim 9, wherein, The light reflection interference layer is made by surface atomization or by applying an anti-glare light scattering film.

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