Display device and terminal equipment

Abstract

The present application discloses a display device. The display device includes a light-emitting layer and a photosensitive layer stacked on the light-emitting side of the light-emitting layer. The photosensitive layer includes M photosensitive sublayers, where M is an integer greater than or equal to 2. The M photosensitive sublayers are stacked in sequence in the light-emitting direction of the light-emitting layer. The light-emitting layer is used to switch between M wavelengths of light. Each photosensitive sublayer in the photosensitive layer corresponds to M wavelengths of light, and is used to be excited by the corresponding wavelengths of light to display patterns of different colors. The display device provided by the present application can switch to display patterns of different colors, so that the display device can switch between multiple display interfaces, thereby making the display device more intelligent and convenient. The present application also provides a mobile terminal.

Description

Technical Field

[0001] The present application relates to the field of information technology, and in particular to a display device and a terminal device thereof. Background Art

[0002] As market and user demands for increasingly intelligent, automated, convenient, and secure vehicles grow, the software required to implement various functions on in-vehicle touchscreens is also becoming increasingly diverse. Existing in-vehicle touchscreens typically only display a limited number of applications for user operation or viewing on a single touchscreen interface, failing to meet user demands for a wider range of applications. Users must manually switch between touchscreen interfaces to display different applications, and each touchscreen interface can only display a single color, making it impossible to display different color patterns on the same touchscreen interface. Summary of the Invention

[0003] The present application provides a display device. The display device can display patterns of different colors on the same touch interface, allowing the display device to switch between multiple display interfaces, thereby making the display device intelligent and convenient. The present application also provides a terminal device.

[0004] In a first aspect, a display device is provided. The display device can be used in a terminal device. The display device includes a light-emitting layer and a photosensitive layer stacked on the light-emitting side of the light-emitting layer. The photosensitive layer is stacked on the light-emitting side of the light-emitting layer so that light of different wavelengths emitted by the light-emitting layer can illuminate the photosensitive layer.

[0005] The photosensitive layer includes M photosensitive sublayers, where M is an integer greater than or equal to 2. That is, the photosensitive layer includes two or more photosensitive sublayers. The M photosensitive sublayers are sequentially stacked in the light-emitting direction of the light-emitting layer. That is, two or more photosensitive sublayers are sequentially stacked in the light-emitting direction of the light-emitting layer. The light-emitting layer is configured to switch between M wavelengths of light. Each photosensitive sublayer in the photosensitive layer corresponds to M wavelengths of light, and is configured to be excited by the corresponding wavelengths of light to display patterns of different colors.

[0006] Each photosensitive sublayer in the photosensitive layer displays a pattern of a different color when stimulated by light of different wavelengths. That is, each photosensitive sublayer in the photosensitive layer is configured to display a pattern of a different color. Since M is an integer greater than or equal to 2, the photosensitive layer is capable of displaying patterns of two or more colors. That is, the display device is capable of displaying patterns of two or more colors.

[0007] In this embodiment, when the light of different wavelengths emitted by the luminescent layer irradiates the photosensitive layer, it can activate different photosensitive sublayers in the photosensitive layer to display patterns of different colors, allowing the display device to display patterns of different colors. Because the luminescent layer can switch between M wavelengths of light, the display device can change the display interface to display patterns of different colors without manually switching the touch interface. In other words, the display device can display patterns of different colors on the same touch interface, allowing the display device to switch between multiple display interfaces, making the display device more intelligent and convenient.

[0008] In one embodiment, the light-emitting layer of the display device automatically switches between M wavelengths to emit light, so that the display device automatically switches between multiple display interfaces, thereby making the display device more automated. Each of the multiple display interfaces displays a different color or pattern.

[0009] Specifically, the display device includes a controller that controls the light-emitting layer to switch between M wavelengths at a preset frequency.

[0010] In this embodiment, the controller controls the light-emitting layer to emit light of different wavelengths at a preset frequency, enabling the display device to automatically switch between multiple display interfaces, thereby making the display device more automated, intelligent, and convenient. The frequencies at which the controller controls the light-emitting layer to automatically switch can be the same or different. That is, the switching intervals of the light emitted by the light-emitting layer can be the same or different.

[0011] In one embodiment, the controller can control the luminous layer to automatically switch display colors at the same or different frequencies. That is, the switching intervals of the luminous layer's light wavelengths can be the same or different. The same intervals between the light emitted by the luminous layer ensure a consistent switching frequency, allowing the user to predict when the display device will display the next display interface. The light emitted by the luminous layer can also be at different intervals. For example, when a display interface contains some commonly used software icons, this display interface can be displayed for a longer period of time, allowing the user to see the commonly used software more frequently.

[0012] When one of the multiple display interfaces displays multiple colors, as long as one of the colors displayed on the display interface is different from the colors displayed on the other display interfaces, the display interface is judged to have different colors from the other display interfaces. That is, while each of the multiple display interfaces displays different colors, it does not necessarily require that every color displayed on the display interface be different; rather, it only requires that at least one color displayed on the display interface be different. Similarly, while each of the multiple display interfaces displays different patterns, it does not necessarily require that every pattern displayed on the display interface be different; rather, it only requires that at least one pattern displayed on the display interface be different.

[0013] In one embodiment, the photosensitive sublayer includes a photosensitive pigment that reacts under irradiation with light of a specific wavelength. The photosensitive pigment can enable the photosensitive sublayer to display a pattern of a specific color.

[0014] The photosensitive pigment includes sub-photosensitive pigments that are sensitive to different colors. When M is equal to 3, that is, the photosensitive layer includes three photosensitive sub-layers. In this case, the photosensitive pigment includes at least three sub-photosensitive pigments.

[0015] In the embodiment of the present application, each sub-photosensitive pigment will be activated only when it is irradiated by light of a specific wavelength, and thus will display the corresponding color. If the sub-photosensitive pigment is not irradiated by light of the corresponding wavelength, the sub-photosensitive pigment will not be activated, and thus will not display any color. For example: the photosensitive pigment in the photosensitive layer includes a blue sub-photosensitive pigment that is sensitive to blue, and a red sub-photosensitive pigment that is sensitive to red. When the wavelength of light emitted by the luminescent layer is blue wavelength light, only the blue sub-photosensitive pigment will be activated, thereby displaying blue. Since the red sub-photosensitive pigment is not activated, it will not display red.

[0016] In one embodiment, the light-emitting layer is configured to emit M wavelengths of invisible light. The photosensitive layer includes M photosensitive sublayers, and the M photosensitive sublayers are configured to be excited one-to-one by the M wavelengths of light emitted by the light-emitting layer to display patterns of M colors.

[0017] In the embodiment of the present application, the light-emitting layer emits light of multiple invisible wavelengths, so that the display interface can switch between multiple different interfaces, and the light-emitting layer can be prevented from emitting visible light to the naked eye to interfere with the display interface, thereby improving the quality of the display device.

[0018] Furthermore, in one embodiment, the luminescent layer is configured to emit light of both infrared and ultraviolet wavelengths. The photosensitive layer comprises two photosensitive sublayers, one of which is an infrared excitation pigment layer and the other is an ultraviolet excitation pigment layer.

[0019] In the embodiment of the present application, the light-emitting layer emits two infrared or ultraviolet lights with wavelengths invisible to the naked eye, so that the display interface can switch between two different interfaces while avoiding the light-emitting layer emitting visible light that interferes with the display interface.

[0020] In one embodiment, the light-emitting layer is configured to emit light of three wavelengths: red, green, and blue. The photosensitive layer includes three photosensitive sublayers. The three photosensitive sublayers are configured to be excited in a one-to-one correspondence with the three wavelengths of light to display patterns of three colors. That is, each of the three photosensitive sublayers displays a pattern of a different color, and each photosensitive sublayer displays a different color.

[0021] Specifically, among the three photosensitive layers in the photosensitive layer, there is one photosensitive layer that can be activated by the red wavelength light emitted by the luminescent layer, there is one photosensitive layer that can be activated by the green wavelength light emitted by the luminescent layer, and there is one photosensitive layer that can be activated by the blue wavelength light emitted by the luminescent layer. In the embodiment of the present application, the order of the red, green and blue wavelengths of light emitted by the luminescent layer is not restricted, and the interval time of the displayed colors is not restricted. Accordingly, the stacking order of the three photosensitive layers in the photosensitive layer is also restricted. In an optional embodiment, the color sequence emitted by the luminescent layer can be red, green and blue wavelengths of light in sequence, and the stacking order of the three photosensitive layers in the photosensitive layer can be a photosensitive layer activated by red wavelength light, a photosensitive layer activated by green wavelength light, and a photosensitive layer activated by blue wavelength light in sequence.

[0022] In the implementation of the present application, the light-emitting layer emits light of three common wavelengths, making the three photosensitive sublayers of the photosensitive layer easier to obtain, reducing the cost of the photosensitive layer, and thus reducing the cost of the display device.

[0023] In one embodiment, the luminescent layer is capable of displaying light of three wavelengths: red, green, and blue. Furthermore, the luminescent layer can generate light of other wavelengths using the three primary colors of red, green, and blue according to a specific ratio, so that the luminescent layer emits light of three or more wavelengths. The photosensitive layer includes three or more photosensitive sublayers. Specifically, the number of photosensitive sublayers in the photosensitive layer matches the type of light emitted by the luminescent layer. For example, if the luminescent layer is capable of emitting light of four wavelengths, the photosensitive layer includes four photosensitive sublayers; if the luminescent layer is capable of emitting light of five wavelengths, the photosensitive layer includes five photosensitive sublayers.

[0024] In this implementation, the light-emitting layer emits light of more than three wavelengths, and the photosensitive layer includes more than three photosensitive sublayers, which enables the display device to switch between more than three display interfaces, increasing the number of display interface switches, thereby enabling the display device to display icons of more functional software.

[0025] In one embodiment, the display device further includes a cover plate, the cover plate being located on the light-emitting side of the light-emitting layer, and the photosensitive layer being integrated into the cover plate.

[0026] In this implementation, the photosensitive layer is integrated into the cover plate, which can simplify the manufacturing process of the display device.

[0027] The cover plate further comprises a glass substrate. The photosensitive layer is located between the glass substrate and the light-emitting layer. The glass substrate can isolate moisture and oxygen to protect the photosensitive layer, thereby improving the quality of the display device.

[0028] In one embodiment, the display device further includes a touch layer. The touch layer is configured to sense touch operations. The touch layer is located between the cover plate and the light-emitting layer. Specifically, the cover plate and the touch layer are both located on the light-emitting side of the light-emitting layer.

[0029] In this implementation, the display device includes a touch layer, enabling it to function as a touch screen, meeting multiple user needs. The touch layer is located between the cover plate and the light-emitting layer. In other words, the cover plate is positioned above the touch layer. Because the cover plate offers features such as impact resistance, scratch resistance, oil resistance, fingerprint resistance, and enhanced light transmittance, it effectively protects the touch layer.

[0030] The display device further includes a first adhesive and a second adhesive. The cover plate and the touch layer are connected via the first adhesive. The touch layer and the light-emitting layer are connected via the second adhesive. The first adhesive can be a solid optically transparent adhesive or a liquid water-based adhesive. The second adhesive can be a solid optically transparent adhesive or a liquid water-based adhesive, or can also be foam adhesive or double-sided tape.

[0031] During the manufacturing process, the cover plate includes a first protective film and a second protective film. When the cover plate is assembled with the touch layer, the second protective film is removed and then bonded to the touch layer using a first adhesive. The first protective film protects the cover plate from scratches. When the cover plate is assembled with the touch layer, the second protective film protects the sensing layer within the cover plate from damage.

[0032] In one embodiment, the display device further includes a touch layer and a cover plate. The touch layer is configured to sense touch operations. The cover plate is located on the light-emitting side of the light-emitting layer. The touch layer is located between the cover plate and the photosensitive layer. The photosensitive layer is located between the touch layer and the light-emitting layer.

[0033] In this embodiment, the display device includes a touch layer, enabling the display device to function as a touch screen, meeting various user needs. The touch layer is located between the cover plate and the photosensitive layer. When a user is using the display device, the cover plate faces the user. The cover plate has features such as impact resistance, scratch resistance, oil resistance, fingerprint resistance, and enhanced light transmittance, enabling the cover plate to protect the touch layer and photosensitive layer from damage, thereby improving the quality of the display device.

[0034] On the other hand, the touch layer is located above the photosensitive layer. That is, only the cover plate is located above the touch layer, which reduces the distance between the touch layer and the contacts, improving touch sensing performance and thus the touch performance of the display device. The contacts can be a user's finger, a stylus, or the like. The touch layer is used to sense touch operations of the contacts.

[0035] In one embodiment, the photosensitive sublayer is a photosensitive pigment layer having a predetermined pattern.

[0036] In this embodiment, the photosensitive sublayer is a photosensitive pigment layer having a predetermined pattern. That is, the different patterns displayed on the display interface in this embodiment are directly determined by each photosensitive sublayer in the photosensitive layer, reducing the requirements of the display device on the processor or the controller. The different patterns can be printed using photosensitive ink.

[0037] In one embodiment, the light-emitting layer is provided with a plurality of light sources, the plurality of light sources being arranged in an array, and the controller being configured to control the plurality of light sources so that the light-emitting layer emits different patterns.

[0038] In this implementation, the multiple light sources of the light-emitting layer are arranged in an array, so that the controller controls the multiple light sources to cause the light-emitting layer to emit different patterns. In this embodiment, the different patterns displayed on the display interface of the display device are determined by the multiple light sources of the light-emitting layer. Therefore, it is not necessary to pattern each photosensitive sublayer in the photosensitive layer, thereby simplifying the process of preparing the photosensitive layer, streamlining the process flow, and reducing process costs.

[0039] In one embodiment, the light-emitting layer has multiple display areas. The light-emitting layers in different display areas are configured to emit light of different wavelengths. The controller is configured to control the display areas so that the light-emitting layers in different display areas emit light of different wavelengths. The wavelengths of light emitted by each display area can be the same or different.

[0040] In this implementation, different regions of the light-emitting layer are used to emit light of different wavelengths, enabling the display interface of the display device to simultaneously display two color patterns, thereby enabling the display interface to achieve a partitioned display. One portion of the display device displays a pattern of one color, while another portion displays a pattern of another color. Different regions display patterns of different colors, enabling the display interface of the display device to maintain the color and pattern displayed in one region while changing the color and pattern displayed in another region. The pattern displayed in the region where the display interface of the display device remains unchanged can be a commonly used software pattern, while the pattern displayed in the region where the display interface changes can be an infrequently used software pattern. This can meet the diverse needs of users and enhance the user experience of the display device.

[0041] In a second aspect, the present application also provides another display device. The display device includes a light-emitting layer and a photosensitive layer stacked on the light-emitting side of the light-emitting layer. The photosensitive layer includes N photosensitive sublayers, where N is an integer greater than or equal to 3. The light-emitting layer is configured to switch between N wavelengths of light. Each photosensitive sublayer in the photosensitive layer corresponds to one of the N wavelengths of light and is configured to be excited by the corresponding wavelength of light to display a pattern of a different color.

[0042] At least two photosensitive layers in the photosensitive layer are equidistant from the light-emitting layer. That is, at least two photosensitive layers in the photosensitive layer are disposed in the same layer. In other words, the photosensitive layer comprises two or more photosensitive layers spliced ​​together to form a single layer. In one embodiment, the photosensitive layer comprises a single layer formed by splicing two or more photosensitive layers together. In other embodiments, the photosensitive layer comprises two or more photosensitive layers spliced ​​together to form a single layer.

[0043] At least two photosensitive layers in the photosensitive layer are at different distances from the light-emitting layer. In other words, at least two photosensitive layers in the photosensitive layer are arranged in different layers. In other words, at least two photosensitive layers in the photosensitive layer are arranged in a stacked manner.

[0044] For example: when N is equal to 3, the photosensitive layer has a total of two layers of structure, and the two layers of structure are stacked. One layer of structure is formed by two layers of photosensitive layers being spliced ​​together to form the same layer structure, and the other layer of structure is composed of another layer of photosensitive layers. The layer of structure composed of another layer of photosensitive layers can be located on the upper layer of the same layer of structure formed by two layers of photosensitive layers being spliced ​​together, and can also be located on the lower layer of the same layer of structure formed by two layers of photosensitive layers being spliced ​​together. When N is equal to 3, the photosensitive layer has a total of two layers of structure, and the two layers of structure are stacked. Both layers of structure are formed by two layers of photosensitive layers being spliced ​​together. Alternatively, one layer of structure is formed by three layers of photosensitive layers being spliced ​​together, and the other layer of structure is formed by one layer of photosensitive layers being spliced ​​together.

[0045] In this embodiment, on the one hand, the light-emitting layer of the display device switches between multiple wavelengths to emit light, allowing the display device to switch between multiple display interfaces, thereby making the display device more intelligent and convenient. On the other hand, the photosensitive sublayers of the photosensitive layer are spliced ​​to form a single layer structure. The photosensitive layer can achieve partitioned display, reducing the thickness of the photosensitive layer and making the display device lighter and thinner. The partitioned display of the photosensitive layer enables the display interface of the display device to also achieve partitioned display, fully utilizing the display interface space of the display device.

[0046] In one embodiment, the light-emitting layer is provided with a plurality of display regions. The photosensitive sublayers correspond to different display regions one by one. The light-emitting layers in different display regions are configured to emit light of different wavelengths.

[0047] In this embodiment, the light-emitting layers in different display areas of the light-emitting layer are configured to emit light of different wavelengths, enabling the display interface of the display device to simultaneously display light of two wavelengths, thereby achieving a zoned display. One portion of the display device displays a pattern of one color, while another portion displays a pattern of another color. Different areas of the display interface display different colors and patterns, meeting the diverse needs of users and enhancing the user experience of the display device.

[0048] In one embodiment, the light-emitting layer of the display device automatically switches between M wavelengths to emit light, so that the display device automatically switches between multiple display interfaces, thereby making the display device more automated. Each of the multiple display interfaces displays a different color or pattern.

[0049] Specifically, the display device includes a controller that controls the light-emitting layer to switch between M wavelengths at a preset frequency.

[0050] In this embodiment, the controller controls the light-emitting layer to emit light of different wavelengths at a preset frequency, enabling the display device to automatically switch between multiple display interfaces, thereby making the display device more automated, intelligent, and convenient. The frequencies at which the controller controls the light-emitting layer to automatically switch can be the same or different. That is, the switching intervals of the light emitted by the light-emitting layer can be the same or different.

[0051] In a third aspect, the present application further provides a terminal device. The terminal device includes a housing and the display device described above. The display device is mounted on the housing.

[0052] In this embodiment, the display device of the terminal device can switch between multiple display interfaces, making the display device more intelligent and convenient, thereby making the terminal device more intelligent and convenient. When the terminal device is an in-vehicle device, the intelligence and convenience of the display device increase the safety of the in-vehicle device. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained like these drawings without any creative work.

[0054] Figure 1 This is a schematic diagram of the structure of the terminal device provided in an embodiment of the present application;

[0055] Figure 2 yes Figure 1 The display device of the terminal device shown is a partial structural diagram of the first embodiment;

[0056] Figure 3 yes Figure 2 A schematic structural diagram of a cover plate of the display device in one state;

[0057] Figure 4 yes Figure 1 A schematic diagram of the structure of the terminal device shown in the use state;

[0058] Figure 5 This is a schematic diagram of the structure of another terminal device in the use state;

[0059] Figure 6 yes Figure 2 A schematic structural diagram of the cover plate of the display device shown in another state;

[0060] Figure 7 yes Figure 1 The display device of the terminal device shown is a partial structural diagram of the second embodiment;

[0061] Figure 8 yes Figure 1 A schematic diagram of a portion of the structure of a display device of a terminal device in a third embodiment is shown;

[0062] Figure 9 yes Figure 1 FIG. 1 is a schematic diagram of a partial structure of a display device of a terminal device in a fourth embodiment;

[0063] Figure 10 yes Figure 8A schematic structural diagram of a photosensitive layer in the display device shown in another embodiment;

[0064] Figure 11 yes Figure 1 FIG. 1 is a schematic diagram of a portion of the structure of a display device of a terminal device in a fifth embodiment. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, rather than all of the embodiments. In the absence of conflict, the features in the embodiments and implementations of the present application can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0066] See also Figure 1 , Figure 1 1 is a schematic diagram of the structure of a terminal device 100 provided in an embodiment of the present application. This embodiment of the present application provides a terminal device 100. The terminal device 100 can be an in-vehicle device, a mobile phone, a tablet computer, an e-reader, a laptop computer, a wearable device, or the like. In the embodiments of the present application, the description is based on an in-vehicle device as an example.

[0067] The terminal device 100 includes a housing 1 and a display device 2. The display device 2 is mounted on the housing 1. The display device 2 can be any product or component with a display function. The housing 1 serves to protect and fix the display device 2.

[0068] Further, please also refer to Figure 1 and Figure 2 , Figure 2 yes Figure 1 The display device 2 of the terminal device 100 shown in FIG. 1 is a partial structural diagram of the first embodiment. Specifically, Figure 2 yes Figure 1 Schematic diagram of the structure of screen assembly 4 in display device 2. Display device 2 includes controller 3 and screen assembly 4. Screen assembly 4 includes a light-emitting layer 41 and a photosensitive layer 42 stacked on the light-emitting side of light-emitting layer 41. In other words, display device 2 includes controller 3, light-emitting layer 41, and photosensitive layer 42 stacked on the light-emitting side of light-emitting layer 41.

[0069] The light-emitting layer 41 may be a thin-film transistor (TFT) liquid crystal display module, an in-plane switching (IPS) liquid crystal display module, an organic light-emitting diode (OLED) display module, or an infrared or ultraviolet light-emitting device.

[0070] Controller 3 can control the light-emitting layer 41 to switch its emission wavelength. Controller 3 controls the light-emitting layer 41 so that it switches its emission wavelength at a preset frequency or as needed. Photosensitive layer 42 is stacked on the light-emitting side of the light-emitting layer 41, allowing light of different wavelengths emitted by the light-emitting layer 41 to strike the photosensitive layer 42. Photosensitive layer 42 senses the different wavelengths of light emitted by the light-emitting layer 41 and selectively displays the light emitted by the light-emitting layer 41.

[0071] In the first embodiment, the display device 2 further includes a cover plate 43. This cover plate 43 is part of the screen assembly 4. It is located on the light-emitting side of the luminescent layer 41. The photosensitive layer 42 is integrated into the cover plate 43. The cover plate 43 also includes a glass substrate 431. The photosensitive layer 42 is located between the glass substrate 431 and the luminescent layer 41. The glass substrate 431 protects the photosensitive layer 42 by isolating it from moisture and oxygen, thereby improving the quality of the display device 2.

[0072] In this embodiment, the photosensitive layer 42 is integrated into the cover plate 43 , which simplifies the manufacturing process of the display device 2 and thus reduces the cost of manufacturing the display device 2 .

[0073] Furthermore, display device 2 includes a touch layer 44. Touch layer 44 is a component of screen assembly 4. Touch layer 44 is used to sense touch operations. Touch layer 44 is located between cover plate 43 and light-emitting layer 41. Specifically, cover plate 43 and touch layer 44 are both located on the light-emitting side of light-emitting layer 41.

[0074] In this embodiment, the display device 2 is provided with a touch layer 44, enabling the display device 2 to function as a touch screen, meeting various user needs. The touch layer 44 is located between the cover plate 43 and the light-emitting layer 41. In other words, the cover plate 43 is positioned above the touch layer 44. Because the cover plate 43 provides impact resistance, scratch resistance, oil resistance, fingerprint resistance, and enhanced light transmittance, it effectively protects the touch layer 44.

[0075] In one optional embodiment, the touch layer 44 may be a film sensor. Specifically, the touch layer 44 may be a conductive glass with indium tin oxide (ITO) formed on a polyethylene glycol terephthalate (PET) or optical material substrate. In other embodiments, the touch layer 44 may be a glass sensor. Specifically, the touch layer 44 may be a single-sided conductive glass or double-sided conductive structure with a glass substrate.

[0076] Furthermore, the display device 2 includes a first adhesive 45 and a second adhesive 46. The first adhesive 45 and the second adhesive 46 are components of the screen assembly 4. The first adhesive 45 is disposed between the cover plate 43 and the touch layer 44. The second adhesive 46 is disposed between the touch layer 44 and the light-emitting layer 41. The first adhesive 45 can be a solid optically transparent adhesive or a liquid water-based adhesive. The second adhesive 46 can be a solid optically transparent adhesive or a liquid water-based adhesive, or it can be foam adhesive or double-sided tape.

[0077] The cover plate 43 and the touch layer 44 are connected by a first adhesive 45 to prevent the cover plate 43 from falling off the touch layer 44, thereby improving the quality of the display device 2. The touch layer 44 and the light-emitting layer 41 are connected by a second adhesive 46 to prevent the touch layer 44 from falling off the light-emitting layer 41, thereby improving the quality of the display device 2.

[0078] Further, please also refer to Figures 2 to 5 , Figure 3 yes Figure 2 A schematic structural diagram of the cover plate 43 of the display device 2 in one state; Figure 4 yes Figure 1 The structure diagram of the terminal device 100 shown is in use; Figure 5 1 is a schematic diagram of the structure of another terminal device 100 in use. Specifically, Figure 3 The structure of the cover plate 43 shown is a schematic diagram of the structure after being assembled with the touch layer 44 . Figure 4 It is a schematic diagram comparing the structures of the display device 2 in the vehicle-mounted equipment under two display interfaces. Figure 5 It is a schematic diagram comparing the structures of the display device 2 in another mobile terminal 100 under two display interfaces.

[0079] The photosensitive layer 42 includes M photosensitive sublayers 421, where M is an integer greater than or equal to 2. That is, the photosensitive layer 42 includes two or more photosensitive sublayers 421. The M photosensitive sublayers 421 are sequentially stacked in the light-emitting direction of the light-emitting layer 41. That is, two or more photosensitive sublayers 421 are sequentially stacked in the light-emitting direction of the light-emitting layer 41. Figure 3 As shown, the arrow direction indicates the light emitting direction of the light emitting layer 41 .

[0080] The luminescent layer 41 is configured to switch between M wavelengths of light. Each photosensitive sublayer 421 in the photosensitive layer 42 corresponds to one of the M wavelengths of light and is configured to display patterns of different colors when excited by the corresponding wavelengths. In other words, each photosensitive sublayer 421 in the photosensitive layer 42 displays a pattern of a different color when exposed to light of different wavelengths.

[0081] For example, when the wavelength of light emitted by the light-emitting layer 41 is within the range of 420nm-485nm, blue light is primarily displayed, with the blue light intensity being strongest at the 465nm wavelength. When the wavelength of light emitted by the light-emitting layer 41 is within the range of 485nm-580nm, green light is primarily displayed, with the green light intensity being strongest at the 515nm wavelength. When the wavelength of light emitted by the light-emitting layer 41 is within the range of 580nm-680nm, red light is primarily displayed, with the red light intensity being strongest at the 635nm wavelength. When the wavelength of light emitted by the light-emitting layer 41 is within the infrared range of 760nm-1mm, a pattern of the corresponding color is displayed. When the wavelength of light emitted by the light-emitting layer 41 is within the ultraviolet range of 10nm-400nm, a pattern of the corresponding color is displayed.

[0082] When the light-emitting layer 41 emits light of a certain wavelength band, the light of that wavelength band strikes the photosensitive layer 42, causing a pattern of the corresponding color to appear on one of the photosensitive sublayers 421 within the photosensitive layer 42. For example, when the light-emitting layer 41 emits infrared light of a certain wavelength band, the infrared light of that wavelength band strikes the photosensitive layer 42, causing a pattern of the corresponding color to appear on one of the photosensitive sublayers 421 within the photosensitive layer 42. When the light-emitting layer 41 emits infrared light of another wavelength band, the infrared light of that wavelength band strikes the photosensitive layer 42, causing a pattern of another corresponding color to appear on one of the photosensitive sublayers 421 within the photosensitive layer 42. Similarly, ultraviolet light of different wavelength bands behaves in a similar manner.

[0083] Since M is an integer greater than or equal to 2, the photosensitive layer 42 can display patterns of two or more colors. That is, the display device 2 can display patterns of two or more colors.

[0084] In this embodiment, when light of different wavelengths emitted by the luminescent layer 41 strikes the photosensitive layer 42, it activates different photosensitive sublayers 421 in the photosensitive layer 42, causing the display device 2 to display patterns of different colors. Because the luminescent layer 41 can switch between M wavelengths of light, the display device 2 can change the display interface to display different color patterns without manually switching the touch interface. In other words, the display device 2 can display different color patterns on the same touch interface, allowing the display device 2 to switch between multiple display interfaces, making the display device 2 more intelligent and convenient.

[0085] Furthermore, the controller 3 is configured to control the light-emitting layer 41 to switch the emission wavelength, so that the display device 2 excites different photosensitive sublayers 421 to display patterns of different colors. When the display device 2 switches the emission between the multiple photosensitive sublayers 421, the display device 2 can switch between multiple display interfaces. Each of the multiple display interfaces displays a different color or pattern.

[0086] In one embodiment, the controller 3 is used to control the light-emitting layer 41 to switch between M wavelengths at a preset frequency. The frequencies at which the controller 3 controls the light-emitting layer 41 to automatically switch the light-emitting wavelengths can be the same or different. That is, the switching intervals of the light-emitting wavelengths of the light-emitting layer 41 can be the same or different. The intervals of the light-emitting wavelengths of the light-emitting layer 41 are the same, so that the frequency of switching the light-emitting wavelengths of the light-emitting layer 41 remains consistent, thereby allowing the user to predict the time when the display device 2 displays the next display interface. The intervals of the light-emitting wavelengths of the light-emitting layer 41 can also be different. For example: when there are some commonly used software icons on the display interface, this display interface can be displayed for a longer time, so that the user sees the commonly used software more frequently.

[0087] When one of the multiple display interfaces displays multiple colors, as long as at least one of the colors displayed on that display interface is different from the colors displayed on the other display interfaces, the display interface is determined to have different colors from the other display interfaces. That is, when each of the multiple display interfaces displays different colors, it does not mean that every color displayed on that display interface is different; instead, it only means that at least one color displayed on that display interface is different. Similarly, when each of the multiple display interfaces displays different patterns, it does not mean that every pattern displayed on each display interface is different; instead, it only means that at least one pattern displayed on each display interface is different.

[0088] like Figure 4As shown, when the display device 2 displays one color, the display interface displays one pattern; when the display device 2 displays another color, the display interface displays another pattern. The colors and patterns displayed on the two display interfaces are different. In this case, the display interface of the display device 2 displays multiple patterns, and as long as one of the patterns changes, it is determined to be a different display interface.

[0089] like Figure 5 As shown, when display device 2 displays one color, the display interface displays one pattern; when display device 2 displays another color, the display interface displays another pattern. The colors and patterns displayed on the two display interfaces are different. In this case, the display interface of display device 2 displays a single pattern. Whenever this pattern changes, it is determined to be a different display interface.

[0090] In this embodiment, light of different wavelengths emitted by the luminescent layer 41 irradiates the photosensitive layer 42, causing different photosensitive sublayers 421 in the photosensitive layer 42 to be excited and display patterns of different colors, thereby enabling the display device 2 to display different colors. Because the different wavelengths of light displayed by the luminescent layer 41 are controlled by the controller 3, it is possible to automatically switch between the different color patterns, allowing the display device 2 to automatically switch between multiple display interfaces, thereby making the display device 2 more automated, intelligent, and convenient.

[0091] Furthermore, the photosensitive sublayer 421 includes a photosensitive pigment that reacts when exposed to light of a specific wavelength. This pigment enables the photosensitive sublayer 421 to display a pattern of a specific color. The photosensitive pigment includes sub-photosensitive pigments sensitive to different wavelengths. When M is 3, the photosensitive layer 42 includes three photosensitive sublayers 421. In this case, the photosensitive pigment includes at least three sub-photosensitive pigments.

[0092] In the embodiment of the present application, each sub-photosensitive pigment will be activated only when it is irradiated with light of a specific wavelength, and thus will display the corresponding color. If the sub-photosensitive pigment is not irradiated with light of the corresponding wavelength, the sub-photosensitive pigment will not be activated, and thus will not display the color. For example: the photosensitive pigment in the photosensitive layer 42 includes a blue sub-photosensitive pigment that is sensitive to blue and a red sub-photosensitive pigment that is sensitive to red. When the color displayed by the light-emitting layer 41 is blue, only the blue sub-photosensitive pigment will be activated, thereby displaying blue. Since the red sub-photosensitive pigment is not activated, it will not display red.

[0093] Furthermore, the luminescent layer 41 is configured to emit M wavelengths of invisible light. Accordingly, the photosensitive layer 42 includes M photosensitive sublayers 421 , each of which is excited by the M wavelengths of light emitted by the luminescent layer 41 to display M color patterns.

[0094] In the first embodiment of the present application, the light-emitting layer 41 emits light of multiple invisible wavelengths, so that the display interface can switch between multiple different interfaces, while avoiding the light-emitting layer 41 emitting visible light that interferes with the display interface, thereby improving the quality of the display device 2.

[0095] Furthermore, the luminescent layer 41 is configured to emit light of both infrared and ultraviolet wavelengths. The photosensitive layer 42 includes two photosensitive sublayers 421. These two photosensitive sublayers 421 are respectively an infrared excitation pigment layer and an ultraviolet excitation pigment layer. Both the infrared excitation pigment and the ultraviolet excitation pigment are conventionally available and can be selected as needed.

[0096] like Figure 3 As shown, in one embodiment, the upper photosensitive layer 421 of the two photosensitive layers 421 is an infrared excitation pigment layer, and the lower photosensitive layer 421 is an ultraviolet excitation pigment layer. In another embodiment, the upper photosensitive layer 421 of the two photosensitive layers 421 is an ultraviolet excitation pigment layer, and the lower photosensitive layer 421 is an infrared excitation pigment layer. That is, in this embodiment of the present application, the arrangement order of the photosensitive pigment layers is not limited.

[0097] When the light-emitting layer 41 emits infrared light of a certain band, the infrared light of the band is irradiated to the photosensitive layer 42, and a photosensitive sublayer 421 in the photosensitive layer 42 displays a pattern of the corresponding color; when the light-emitting layer 41 emits ultraviolet light, the ultraviolet light is irradiated to the photosensitive layer 42, and a photosensitive sublayer 421 in the photosensitive layer 42 displays a pattern of another corresponding color.

[0098] In the first embodiment of the present application, the light-emitting layer 41 emits two wavelengths of infrared and ultraviolet light that are invisible to the naked eye, so that the display interface can switch between two different interfaces while avoiding the light-emitting layer 41 emitting visible light that interferes with the display interface, thereby improving the quality of the display device 2.

[0099] In other embodiments, the light-emitting layer 41 may further emit infrared light of multiple different wavelength bands or ultraviolet light of multiple different wavelength bands, and the photosensitive layer 42 may include three or more photosensitive sublayers 421. The three or more photosensitive sublayers 421 in the photosensitive layer 42 may be configured to produce different display colors in response to infrared light of different wavelength bands or ultraviolet light of different wavelength bands.

[0100] In the embodiment of the present application, the light-emitting layer 41 emits infrared or ultraviolet light of multiple wavelengths invisible to the naked eye, so that the display interface can switch between multiple different interfaces while avoiding the light-emitting layer 41 emitting visible light that interferes with the display interface, thereby improving the quality of the display device 2.

[0101] Furthermore, the photosensitive sublayer 421 is a photosensitive pigment layer having a predetermined pattern.

[0102] In this embodiment, the photosensitive sublayer 421 is a photosensitive pigment layer having a predetermined pattern. That is, in this embodiment, the different patterns displayed on the display interface are directly determined by each photosensitive sublayer 421 in the photosensitive layer 42, which reduces the requirements of the display device 2 on the processor or controller 3. The different patterns can be printed using photosensitive ink.

[0103] Further, see Figure 6 , Figure 6 yes Figure 2 FIG. 4 is a schematic structural diagram of the cover plate 43 of the display device 2 in another state. Specifically, Figure 6 The cover plate 43 shown is a schematic diagram of the structure before assembly with the touch layer 44. During the manufacturing process, the cover plate 43 includes a first protective film 432 and a second protective film 433. When the cover plate 43 is assembled with the touch layer 44, the second protective film 433 is removed and then bonded to the touch layer 44 using a first adhesive 45.

[0104] The first protective film 432 can protect the cover plate 43 from being scratched. When the cover plate 43 is not assembled with the touch layer 44, the second protective film 433 can protect the photosensitive layer 42 in the cover plate 43 from being damaged.

[0105] Further, please also refer to Figure 1 and Figure 7 , Figure 7 yes Figure 1 The display device 2 of the terminal device 100 is a partial structural diagram of the second embodiment. Most of the technical solutions in this embodiment that are the same as those in the first embodiment will not be repeated.

[0106] The light-emitting layer 41 has multiple display areas. The light-emitting layer 41 in different display areas is configured to emit light of different wavelengths. The controller 3 is configured to control the display areas so that the light-emitting layer 41 in different display areas emits light of different wavelengths. The wavelengths of light emitted by each display area can be the same or different.

[0107] In this embodiment, different areas of the light-emitting layer 41 are used to emit light of different wavelengths, which can enable the display interface of the display device 2 to simultaneously display patterns of two colors, thereby enabling the display interface to achieve a partitioned display. One portion of the display device 2 displays a pattern of one color, while another portion can display a pattern of another color. Different areas display patterns of different colors, so that the display interface of the display device 2 can achieve the color and pattern displayed in one area remaining unchanged, while the color and pattern displayed in another area can change. Among them, the pattern displayed in the area where the display interface of the display device 2 remains unchanged can be a commonly used software pattern, and the pattern displayed in the area where the display interface changes is an uncommon software pattern, thereby meeting the different needs of users and improving the user experience of the display device 2.

[0108] In the second embodiment of the present application, the light emitting layer is provided with two different display areas. Figure 7 As shown, the light-emitting layer 41 is divided into a first display area 411 and a second display area 412. In one display situation, the first display area 411 emits light of infrared wavelengths, and the second display area 412 emits light of ultraviolet wavelengths, so that the display interface of the display device 2 partially displays a pattern of one color and partially displays a pattern of another color.

[0109] Further, please also refer to Figure 1 and Figure 8 , Figure 8 yes Figure 1 The diagram shows a partial structure of the display device 2 of the terminal device 100 in the third embodiment. Most of the technical solutions in this embodiment that are the same as those in the previous embodiments are not repeated here.

[0110] In this embodiment, the light-emitting layer 41 is configured to emit light of three wavelengths: red, green, and blue. The photosensitive layer 42 includes three photosensitive sublayers 421. Each of the three photosensitive sublayers 421 is configured to be excited by light of the three wavelengths in a one-to-one correspondence to display patterns of three colors. That is, each of the three photosensitive sublayers 421 displays a pattern of a different color, and each photosensitive sublayer 421 displays a different color.

[0111] In other embodiments, the light-emitting layer 41 can emit light of only two wavelengths visible to the naked eye, or can emit light of three or more wavelengths invisible to the naked eye. In the third embodiment of the present application, the light-emitting layer 41 is described as emitting light of three wavelengths visible to the naked eye.

[0112] Specifically, among the three photosensitive layers 421 in the photosensitive layer 42, there is one photosensitive layer 421 that can be excited by the red wavelength light emitted by the light-emitting layer 41 and display a pattern of one color (which can be red or other colors), there is one photosensitive layer 421 that can be excited by the green wavelength light emitted by the light-emitting layer 41 and display a pattern of another color (which can be green or other colors), and there is one photosensitive layer 421 that can be excited by the blue wavelength light emitted by the light-emitting layer 41 and display a pattern of yet another color (which can be blue or other colors).

[0113] In the embodiment of the present application, the order of the red, green, and blue wavelengths of light emitted by the light-emitting layer 41 is not limited, nor is the time interval between the light emissions. Accordingly, the stacking order of the three photosensitive sublayers 421 in the photosensitive layer 42 is not limited. In an optional embodiment, the wavelengths of light emitted by the light-emitting layer 41 can be red, green, and blue, respectively, and the stacking order of the three photosensitive sublayers 421 in the photosensitive layer 42 can be a photosensitive layer 421 excited by red wavelength light, a photosensitive layer 421 excited by green wavelength light, and a photosensitive layer 421 excited by blue wavelength light.

[0114] In the embodiment of the present application, the light-emitting layer 41 emits light of three common wavelengths: red, green, and blue, making the three photosensitive sublayers 421 of the photosensitive layer 42 easier to obtain, reducing the cost of the photosensitive layer 42, and thus reducing the cost of the display device 2.

[0115] Further, please also refer to Figure 1 and Figure 9 , Figure 9 yes Figure 1 The diagram shows a partial structure diagram of the display device 2 of the terminal device 100 in the fourth embodiment. Most of the technical solutions in this embodiment that are the same as those in the previous embodiments are not repeated here.

[0116] In this embodiment, the light-emitting layer 41 can emit light of three wavelengths: red, green, and blue. Furthermore, the light-emitting layer 41 can generate light of other wavelengths by using the three primary colors of red, green, and blue in a certain ratio, so that the light-emitting layer 41 can emit light of more than three wavelengths. The photosensitive layer 42 includes more than three photosensitive sublayers 421.

[0117] Specifically, the number of photosensitive sublayers 421 in the photosensitive layer 42 is adapted to the type of light emitted by the luminescent layer 41. For example, if the luminescent layer 41 is capable of emitting light of four wavelengths, the photosensitive layer 42 includes four photosensitive sublayers 421; if the luminescent layer 41 is capable of emitting light of five wavelengths, the photosensitive layer 42 includes five photosensitive sublayers 421. Figure 5 As shown, in the fourth embodiment of the present application, the description is made by taking the example that the photosensitive layer 42 includes four photosensitive sublayers 421 .

[0118] In this embodiment, the light-emitting layer 41 emits light of more than three wavelengths, and the photosensitive layer 42 includes more than three photosensitive sublayers 421, which enables the display device 2 to automatically switch between more than three display interfaces, increasing the number of display interfaces, so that the display device 2 can display icons of more functional software.

[0119] Further, see Figure 10 , Figure 10 yes Figure 8 A schematic diagram of the structure of the photosensitive layer 42 in the display device 2 in another embodiment is shown. In this embodiment, the structure of the three photosensitive sublayers 421 in the photosensitive layer 42 is modified. The three photosensitive sublayers 421 form a two-layer structure. These two layers are stacked. Specifically, two of the three photosensitive sublayers 421 are spliced ​​together to form a single layer, and the other photosensitive sublayer 421 forms another layer.

[0120] In this embodiment, the photosensitive sublayer 421 in the photosensitive layer 42 is spliced ​​to form a single layer, reducing the thickness of the photosensitive layer 42 and making the display device 2 thinner and lighter. The luminescent layer 41 and the photosensitive layer 42 are both arranged in zones, enabling the display interface of the display device 2 to be displayed in zones, fully utilizing the display interface space of the display device 2.

[0121] Further, please also refer to Figure 1 and Figure 11 , Figure 11 yes Figure 1 The diagram shows a partial structure diagram of the display device 2 of the terminal device 100 in the fifth embodiment. Most of the technical solutions in this embodiment that are the same as those in the previous embodiments are not repeated here.

[0122] In this embodiment, the photosensitive layer 42 is not integrated into the cover plate 43. The photosensitive layer 42 is located between the touch layer 44 and the light-emitting layer 41. In this embodiment, the cover plate 43 includes a glass substrate 431. The touch layer 44 is located between the cover plate 43 and the photosensitive layer 42.

[0123] The touch layer 44 is located between the cover plate 43 and the photosensitive layer 42. When the user is using the display device 2, the cover plate 43 faces the user. The cover plate 43 has functions such as impact resistance, scratch resistance, oil resistance, anti-fingerprint resistance, and enhanced light transmittance. This protects the touch layer 44 and photosensitive layer 42 from damage, thereby improving the quality of the display device 2.

[0124] On the other hand, the touch layer 44 is located above the photosensitive layer 42. That is, only a cover plate 43 is provided above the touch layer 44. This reduces the distance between the touch layer 44 and the contacts, improving touch sensing performance and thus enhancing the touch performance of the display device 2. The contacts can be a user's finger, a stylus, or the like. The touch layer 44 is used to sense touch operations of the contacts.

[0125] Further, please also refer to Figures 1 to 11 The present invention also provides another display device 2. The display device 2 includes a light-emitting layer 41 and a photosensitive layer 42 stacked on the light-emitting side of the light-emitting layer 41. The photosensitive layer 42 includes N photosensitive sublayers 421, where N is an integer greater than or equal to 3. The light-emitting layer 41 is configured to switch between N wavelengths of light. Each photosensitive sublayer 421 in the photosensitive layer 42 corresponds to one of the N wavelengths of light and is configured to be excited by the corresponding wavelength of light to display a pattern of a different color.

[0126] There are at least two photosensitive layers 421 in the photosensitive layer 42, and the distances between them and the light-emitting layer 41 are equal. That is, there are at least two photosensitive layers 421 in the photosensitive layer 42, which are arranged in the same layer. In other words, the photosensitive layer 42 has two or more photosensitive layers 421 that are spliced ​​together and located in the same layer. In one embodiment, the photosensitive layer 42 has one layer formed by splicing two or more photosensitive layers 421 together. In other embodiments, the photosensitive layer 42 has two or more photosensitive layers 421 that are spliced ​​together and formed in the same layer.

[0127] There are at least two photosensitive layers 421 in the photosensitive layer 42 that are at different distances from the light-emitting layer 41. That is, there are at least two photosensitive layers 421 in the photosensitive layer 42 that are arranged in different layers. In other words, there are at least two photosensitive layers 421 in the photosensitive layer 42 that are stacked.

[0128] For example: when N is equal to 3, the photosensitive layer 42 has a total of two layers of structure, and the two layers of structure are stacked. One layer of structure is formed by two layers of photosensitive layers 421 spliced ​​together to form the same layer structure, and the other layer of structure is composed of another layer of photosensitive layer 421. The layer of structure composed of another layer of photosensitive layer 421 can be located on the upper layer of the same layer of structure formed by two layers of photosensitive layers 421 spliced ​​together, and can also be located on the lower layer of the same layer of structure formed by two layers of photosensitive layers 421 spliced ​​together. When N is equal to 3, the photosensitive layer 42 has a total of two layers of structure, and the two layers of structure are stacked. Both layers of structure are formed by two layers of photosensitive layers 421 spliced ​​together. Alternatively, one layer of structure is formed by three layers of photosensitive layers 421 spliced ​​together, and the other layer of structure is formed by one layer of photosensitive layer 421 spliced ​​together.

[0129] In the embodiment of the present application, on the one hand, the light-emitting layer 41 of the display device 2 switches to emit light at multiple wavelengths, allowing the display device 2 to switch between multiple display interfaces, thereby making the display device 2 more intelligent and convenient. On the other hand, the photosensitive sublayer 421 of the photosensitive layer 42 is spliced ​​to form a layer structure. The photosensitive layer 42 can achieve partitioned display, reducing the thickness of the photosensitive layer 42, making the display device 2 lighter and thinner. The photosensitive layer 42 achieves partitioned display, so that the display interface of the display device 2 can also achieve partitioned display, making full use of the display interface space of the display device 2.

[0130] Furthermore, the light-emitting layer 41 is provided with multiple display regions. The photosensitive sublayers 421 correspond to the different display regions one by one. The light-emitting layer 41 in each display region is configured to emit light of different wavelengths. The controller 3 is configured to control the display regions so that the light-emitting layer 41 emits light of different wavelengths.

[0131] In this embodiment, the light-emitting layer 41 emits light of different wavelengths in different display areas, enabling the display interface of the display device 2 to simultaneously display light of two wavelengths, thereby achieving a zoned display. One portion of the display device 2 displays a pattern of one color, while another portion displays a pattern of another color. Different areas of the display interface display different colors and patterns, meeting the diverse needs of users and enhancing the user experience of the display device 2.

[0132] Furthermore, the display device 2 includes a controller 3. The controller 3 controls the light-emitting layer 41 to switch between M wavelengths at a preset frequency. The controller 3 can control the light-emitting layer 41 to automatically switch between emitting light, and the photosensitive layer 42 to automatically switch between displaying different color patterns, allowing the display device 2 to automatically switch between multiple display interfaces, thereby making the display device 2 more automated, intelligent, and convenient. The frequencies at which the controller 3 controls the light-emitting layer 41 to automatically switch between emitting light can be the same or different. That is, the switching intervals of the light emitted by the light-emitting layer 41 can be the same or different.

[0133] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and embodiments of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there may be changes in the specific embodiments and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A display device, characterized in that: The invention comprises a light-emitting layer and a photosensitive layer stacked on the light-emitting side of the light-emitting layer, wherein the photosensitive layer comprises M photosensitive sublayers, where M is an integer greater than or equal to 2, and the M photosensitive sublayers are stacked in sequence in the light-emitting direction of the light-emitting layer; the light-emitting layer is configured to switch between M wavelengths of light, and each photosensitive sublayer in the photosensitive layer corresponds to the M wavelengths of light, and is configured to be excited by the corresponding wavelengths of light to display patterns of different colors; The display device further includes a cover plate, the cover plate being located on the light-emitting side of the light-emitting layer, and the photosensitive layer being integrated into the cover plate; The cover plate includes a glass substrate, and the photosensitive layer is located between the glass substrate and the light-emitting layer.

2. The display device according to claim 1, wherein The display device includes a controller, which controls the light-emitting layer to switch and emit light among M wavelengths at a preset frequency.

3. The display device according to claim 1, wherein The light-emitting layer is used to emit light of M wavelengths and is invisible light. The photosensitive layer includes M photosensitive sublayers, and the M photosensitive sublayers of the photosensitive layer are used to be excited one-to-one by the M wavelengths of light emitted by the light-emitting layer to display patterns of M colors.

4. The display device according to claim 3, wherein The light-emitting layer is used to emit light of two wavelengths, infrared and ultraviolet. The photosensitive layer includes two photosensitive sublayers, which are an infrared excitation pigment layer and an ultraviolet excitation pigment layer respectively.

5. The display device according to claim 1, wherein The light-emitting layer is used to emit light of three wavelengths: red, green and blue. The photosensitive layer includes three photosensitive sublayers, and the three photosensitive sublayers of the photosensitive layer are used to be excited by the three wavelengths of light in a one-to-one correspondence to display patterns of three colors.

6. The display device according to any one of claims 1 to 5, wherein: The photosensitive sublayer is a photosensitive pigment layer with a predetermined pattern.

7. The display device according to any one of claims 1 to 5, characterized in that The light-emitting layer is provided with a plurality of display areas, and the light-emitting layers in different display areas are used to emit light of different wavelengths.

8. A display device, characterized in that: The device comprises a light-emitting layer and a photosensitive layer stacked on a light-emitting side of the light-emitting layer, wherein the photosensitive layer comprises N photosensitive sublayers, where N is an integer greater than or equal to 3, and the light-emitting layer is configured to switch between N wavelengths of light, and each photosensitive sublayer in the photosensitive layer corresponds to the N wavelengths of light, and is configured to be excited by the corresponding wavelength of light to display patterns of different colors; The distances between at least two of the photosensitive layers and the light-emitting layer are equal, and the distances between at least two of the photosensitive layers and the light-emitting layer are different; The display device further includes a cover plate, the cover plate being located on the light-emitting side of the light-emitting layer, and the photosensitive layer being integrated into the cover plate; The cover plate includes a glass substrate, and the photosensitive layer is located between the glass substrate and the light-emitting layer.

9. The display device according to claim 8, wherein The light-emitting layer is provided with a plurality of display areas, and the photosensitive sublayers correspond to different display areas one by one. The light-emitting layers in different display areas are used to emit light of different wavelengths.

10. The display device according to claim 8 or 9, wherein: The display device includes a controller, which controls the light-emitting layer to switch and emit light among N wavelengths at a preset frequency.

11. A terminal device, characterized in that: The utility model comprises a housing and a display device according to any one of claims 1 to 10, wherein the display device is mounted on the housing.

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