CN113079228B - Terminal equipment and display module - Google Patents
Terminal equipment and display module Download PDFInfo
- Publication number
- CN113079228B CN113079228B CN202010004364.2A CN202010004364A CN113079228B CN 113079228 B CN113079228 B CN 113079228B CN 202010004364 A CN202010004364 A CN 202010004364A CN 113079228 B CN113079228 B CN 113079228B
- Authority
- CN
- China
- Prior art keywords
- display module
- light
- optical waveguide
- diffraction gratings
- photoelectric conversion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 115
- 238000006243 chemical reaction Methods 0.000 claims abstract description 64
- 239000000758 substrate Substances 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 19
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 238000004891 communication Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000011521 glass Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 239000010408 film Substances 0.000 description 4
- 230000001976 improved effect Effects 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005525 hole transport Effects 0.000 description 3
- 230000031700 light absorption Effects 0.000 description 3
- 239000011368 organic material Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001427 coherent effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000005276 holographic polymer dispersed liquid crystals (HPDLCs) Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000004984 smart glass Substances 0.000 description 1
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/20—Optical components
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Signal Processing (AREA)
- Optical Couplings Of Light Guides (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Abstract
The embodiment of the application provides a display module assembly and terminal equipment, include: a display module for displaying an image; an optical waveguide positioned above a display plane of the display module; at least one photoelectric conversion module for receiving the light transmitted by the optical waveguide; at least one of the first group of diffraction gratings or the second group of diffraction gratings is used for guiding part of light, the incident angle and the wavelength of which meet preset conditions, in the light emitted to the display plane of the display module from the outside of the display module into the light waveguide; the optical waveguide is used for receiving the light transmitted by the optical waveguide; wherein the first set of diffraction gratings comprises one or more diffraction gratings and is located between the optical waveguide and the display module, the second set of diffraction gratings comprises one or more diffraction gratings, and the optical waveguide is located between the second set of diffraction gratings and the display module. By covering the optical waveguide and the diffractive optical element on the display module, the normal use of a user can be ensured, and meanwhile, the better light energy utilization rate is ensured.
Description
Technical Field
The application relates to the field of terminal equipment, in particular to terminal equipment and a display module.
Background
Along with the development of the technology, the application of the wireless charging technology is more and more extensive, the remote wireless charging can get rid of the position coupling of the terminal equipment, great flexibility is realized, and finally, a user does not sense the electric power, thereby representing the technical development direction of the wireless charging. For long-distance wireless charging, there are two long-distance wireless charging methods, namely microwave and optical charging. The wireless light charging has smaller relation between charging power and distance, is easy to control safety, and has smaller module volume, thereby having more development potential.
On the other hand, more and more terminal devices begin to use environmental energy, and light energy represented by solar energy is an environment energy source which is easy to obtain and high in power, and an attempt has been made to install a solar panel on the terminal devices. How to ensure the utilization rate of the terminal equipment for the optical energy on the basis of ensuring the convenience of the terminal equipment for users is a problem to be solved urgently.
Disclosure of Invention
The terminal equipment and the display module are provided, and the optical waveguide and the diffraction optical element such as the diffraction grating are covered on the display module, so that the terminal equipment can be ensured to have better light energy utilization rate while the normal use of the terminal equipment by a user is ensured.
In a first aspect, a display module is provided, including: a display module for displaying an image; an optical waveguide positioned above a display plane of the display module; at least one photoelectric conversion module for receiving the light transmitted in the optical waveguide; at least one of the first group of diffraction gratings or the second group of diffraction gratings is used for guiding a first part of light rays, of the light rays emitted to the display plane of the display module from the outside of the display module, of which the incident angles and the wavelengths meet preset conditions, into the optical waveguide; the optical waveguide is used for receiving the light transmitted by the optical waveguide; wherein the first set of diffraction gratings comprises one or more diffraction gratings and is located between the optical waveguide and the display module, the second set of diffraction gratings comprises one or more diffraction gratings and the optical waveguide is located between the second set of diffraction gratings and the display module.
The photoelectric conversion function is integrated on the display module, the area of light absorption is large, and the area outside an additional screen can not be increased. Under the condition of not influencing the screen ratio, the large-area light energy absorption is realized, and the wireless light energy conversion with higher power can be provided. Because the diffraction grating is thin, the influence on the light emission of the display module is small, the transparency is good, and the absorption and the conversion of more light can be realized through the design. Meanwhile, due to the fact that the diffraction grating is additionally arranged, incident light can be guided, reflection of the light is greatly reduced, the screen can be watched under the strong light irradiation environment, and user experience is improved.
Optionally, the first set of diffraction gratings are reflective gratings and the second set of diffraction gratings are transmissive gratings.
According to the first aspect, in a first possible implementation manner of the display module, at least a part of light emitted by the display module penetrates through at least one of the first group of diffraction gratings or the second group of diffraction gratings and the optical waveguide, and is emitted to the outside of the display module, so that a user does not influence normal viewing of an image presented by the display module.
In a second possible implementation manner of the display module according to the first aspect or the first possible implementation manner of the first aspect, the first group of diffraction gratings includes a plurality of diffraction gratings that are arranged in a stacked or tiled manner, or the second group of diffraction gratings includes a plurality of diffraction gratings that are arranged in a stacked or tiled manner.
In a third possible implementation manner of the display module according to the first aspect, in the first or any one of the above first to third implementation manners, at least one diffraction grating of the first or second sets of diffraction gratings guides a second part of the first part of the light, which has a wavelength within an operating range of at least some photoelectric conversion modules of the at least one photoelectric conversion module, into the optical waveguide at a specific angle, where the specific angle enables the second part of the light to be transmitted in a direction toward the at least some photoelectric conversion modules within the optical waveguide. The narrower the wavelength corresponding to the photoelectric conversion module is, the higher the conversion efficiency thereof is, and by allowing light in a specific wavelength range to be received by a specific one or more photoelectric conversion modules, the efficiency of photoelectric conversion can be effectively improved.
According to the first aspect or any one of the foregoing implementation manners of the first aspect, in a fourth possible implementation manner of the display module, a characteristic wavelength range of the at least one diffraction grating corresponds to a working range of the specific one or more photoelectric conversion modules in a one-to-one manner. It will be appreciated that the characteristic wavelength range is an inherent property of a diffraction grating which can only change the transmission path of light within the characteristic wavelength range, but not light having a wavelength outside the characteristic wavelength range, when the angle of incidence is satisfactory. Establishing a correspondence between the characteristic wavelength range of the at least one diffraction grating and the operating range of the specific one or more photoelectric conversion modules is a preferred technical means for achieving that the light of the specific wavelength range is received by the specific one or more photoelectric conversion modules.
According to the first aspect or any one of the above implementation manners of the first aspect, in a fifth possible implementation manner of the display module, the diffraction grating is a surface relief grating or a volume holographic grating.
According to the first aspect or any one of the above implementation manners of the first aspect, in a sixth possible implementation manner of the display module, the optical waveguide covers an entire display plane of the display module. The optical waveguide covers the entire display plane of the display module, and can increase the area of absorbing light energy.
In a seventh possible implementation form of the display module according to the first aspect as such or any one of the implementation forms of the first aspect, the optical waveguide is a substrate of the display module. The substrate made of glass or optical plastic of the display module can be used as an optical waveguide, so that the multiplexing of the original structural part is realized, and the thickness of the display module is further reduced.
According to the first aspect or any one of the foregoing implementation manners of the first aspect, in an eighth possible implementation manner of the display module, the at least one photoelectric conversion module is further configured to convert optical energy in the first portion of light meeting the preset condition into electric energy, or convert light-borne information in the first portion of light meeting the preset condition into light-borne information, and accordingly, wireless optical charging or wireless optical communication may be achieved.
In a second aspect, a terminal device is provided, which includes the display module described in the first aspect or any implementation manner of the first aspect. The terminal device includes but is not limited to a mobile phone, a tablet computer, a notebook computer, a smart bracelet, a smart watch, a smart helmet, smart glasses or a vehicle-mounted device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display module according to an embodiment of the present application.
Fig. 2 is a schematic view illustrating a light propagation path in a display module according to an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of a display module according to a second embodiment of the present application.
Fig. 4 is a schematic view illustrating a light propagation path in a display module according to a second embodiment of the present disclosure.
Fig. 5 is a first wavelength-angle two-dimensional schematic diagram suitable for use in either embodiment one or embodiment two of the present application.
FIG. 6 is a second wavelength-angle two-dimensional schematic diagram suitable for use in one or second embodiments of the present application.
Fig. 7 is a schematic structural diagram of a display module according to a third embodiment of the present application.
Fig. 8 is a schematic structural diagram of a display module according to a fourth embodiment of the present application.
Fig. 9 is a schematic structural diagram of a display module according to a fifth embodiment of the present application.
Fig. 10 is a schematic structural diagram of a display module according to a sixth embodiment of the present application.
Fig. 11 is a schematic structural diagram of a display module according to a seventh embodiment of the present application.
Fig. 12 is a wavelength-angle two-dimensional schematic diagram suitable for use in example seven of the present application.
Fig. 13 is a schematic structural diagram of a display module according to an eighth embodiment of the present application.
Fig. 14 is a schematic view illustrating a light propagation path in a display module according to an eighth embodiment of the present disclosure.
Fig. 15 is a schematic diagram of a terminal device provided in embodiment nine of the present application.
Fig. 16 is a schematic structural diagram of an organic light emitting diode-based display module included in a display module or a terminal device according to one to nine embodiments of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Example one
The embodiment of the application provides a display module assembly, through cover optical waveguide and Diffraction Optical Element (DOE) on display module, like the diffraction grating, can guarantee better light energy utilization when guaranteeing user's normal use.
Fig. 1 is a schematic structural diagram of a display module according to an embodiment of the present disclosure.
As shown in fig. 1, the display module includes: display module 110, photoelectric conversion module 120, optical waveguide 130, and diffraction grating 140.
The display module 110 is used for displaying an image, and may display an interactive interface of an electronic device, for example, the display module 110 may be an OLED display module, and may include a substrate, a hole transport layer, an organic light emitting layer, or an electron transport layer, and the like, and it should be understood that the application is not limited to the specific form of the display module 110.
The optical waveguide 130 is located above the display plane of the display module 110, and is capable of limiting light to be transmitted therein, and transmitting the light diffracted by the diffraction grating 140 to the at least one photoelectric conversion module 120. The operation of optical waveguide 130 is based on the principle of total reflection: the light propagating in the optical waveguide is constrained to propagate in the optical waveguide as long as the total reflection condition is satisfied. According to snell's law, n1sin θ 1 ═ n2sin θ 2, where n1 is the refractive index of the optical waveguide material, n2 is the refractive index of the use environment, n2 is the refractive index of air in the normal environment, and is generally 1, θ 1 and θ 2 are the propagation angles (included angles with the normal direction) of light rays in the optical waveguide, respectively, and when the angle θ 2 at which light rays exit the optical waveguide is 90 °, θ 1 ═ arcsin (1/n1) is the critical angle, that is, incident light rays larger than this angle all satisfy the total reflection condition.
The photoelectric conversion module 120 is used for receiving the light transmitted by the optical waveguide 130. It should be understood that the photoelectric conversion module 120 can be located at any position around the display module 110, and can be set according to specific design requirements or actual needs as long as the display module 110 is not shielded, for example: the display module 110 is generally rectangular, and the photoelectric conversion module 120 is located at any one side of four sides of the rectangle, or located at the periphery of the rectangle. In other embodiments of the present application, a plurality of photoelectric conversion modules may be provided, and each of the photoelectric conversion modules may be located at a plurality of positions around the display module 110.
The diffraction grating 140 has wavelength selectivity and angle selectivity. Wavelength selectivity means that diffraction grating 140 only acts on incident light rays within the characteristic wavelength range [ λ 1, λ 2], i.e., changes the propagation direction of the light rays by diffraction, while incident light rays outside the characteristic wavelength range are substantially unaffected by the presence of the grating. The angular selectivity means that the diffraction grating 140 shows, through the diffraction effect on the incident light, that only the incident light with the incident angle range within the characteristic angle range [ phi 1, phi 2] will be efficiently guided to the predetermined emergent direction, and the incident light outside the characteristic angle range is not substantially affected by the existence of the grating. The customization of wavelength selectivity, angle selectivity and the emergent direction of incident light guided by the grating is realized by selecting different preparation parameters during the preparation of the diffraction grating so as to generate different grating structures, the theoretical basis behind the customization is a Kegine formula and a strict coupled wave analysis theory, the customization belongs to the prior known technology, and the embodiment of the customization is not detailed.
The diffraction grating 140 is a reflection grating, is located between the optical waveguide 130 and the display module 110, and diffracts the light beam meeting the preset condition into the optical waveguide 130 at an incident angle greater than a first threshold value, where the first threshold value is an angle value of a critical incident angle when the light beam generates total reflection in the optical waveguide 130. The predetermined condition is related to an inherent property of the diffraction grating 140, and includes at least one of a wavelength or an incident angle, and when a light having a wavelength or an incident angle outside a predetermined range is incident on the diffraction grating 140, the diffraction grating 140 cannot cause the light to be totally reflected in the optical waveguide 130.
The wavelength of the light emitted by the display module 110 is in the range of [ λ 3, λ 4], which in many cases is in the visible range, typically between 350 nm and 780 nm, and the incident angle of the emitted light into the diffraction grating also has a certain angular range [ φ 3, φ 4 ]. In order not to affect the display of the display module, it is necessary to make [ λ 3, λ 4] outside the characteristic wavelength range [ λ 1, λ 2] or [ φ 3, φ 4] outside the characteristic angle range [ φ 1, φ 2 ].
Alternatively, when the display module is used for wireless optical charging, the photoelectric conversion module 120 includes a photosensitive unit and a circuit unit. The light sensing unit senses light transmitted by the optical waveguide and converts an optical signal into an electrical signal, and the circuit unit supplies electric energy in the electrical signal to the energy storage module connected with the display module or directly supplies electric energy to other modules connected with the display module.
Alternatively, when the display module is used for wireless optical communication, the photoelectric conversion module 120 includes a light sensing unit and a circuit unit. The light sensing unit senses light transmitted by the optical waveguide, converts an optical signal into an electrical signal, and the circuit unit processes information carried by the electrical signal, wherein the processing includes but is not limited to amplification, shaping, sampling, filtering, encoding or modulation.
Alternatively, the optical waveguide 130 is made of a material having good optical transparency, such as glass or optical plastic.
Optionally, the optical waveguide 130 covers the entire display plane of the display module 110.
According to the embodiment of the application, the photoelectric conversion function is integrated on the display module, the area of light absorption is large, and the area outside an extra screen can not be increased. Under the condition of not influencing the screen ratio, the large-area light energy absorption is realized, and the wireless light energy conversion with higher power can be provided. Because the diffraction grating is thin, the influence on the light emission of the display module is small, the transparency is good, and more light can be absorbed and converted through design. Meanwhile, due to the fact that the diffraction grating is additionally arranged, incident light can be guided, reflection of the light is greatly reduced, the screen can be watched under the strong light irradiation environment, and user experience is improved.
Alternatively, for the diffraction grating 140, the corresponding preset conditions are that the incident angle of the incident light is in a first range, and the wavelength of the incident light is in a second range. For example, the first range is [30 °, 60 ° ], and the second range is [550nm, 570nm ].
Optionally, the diffraction grating 140 is a Volume Holographic Grating (VHG) or a Surface Relief Grating (SRG).
For VHG, the periodic spatial intensity distribution of the interfering light causes a corresponding periodic distribution of the refractive index on the grating-making material, i.e. VHG, by letting two coherent laser beams (reference beam K1 and object beam K2) interfere on a specific grating-making material (thin film made of silver salt material, dichromated gelatin, photopolymer or holographic polymer dispersed liquid crystal, etc., with a thickness d typically in the range of a few micrometers to a few tens of micrometers). During preparation, the characteristic angle range, the diffraction emergence angle range and the characteristic wavelength range of the prepared grating are customized by selecting parameters such as material selection, film thickness d, a reference light wave vector K1 (including light wave wavelength and incidence angle), an object light wave vector K2 (the light wave wavelength corresponding to K2 is required to be the same as the reference light wave vector K1, and the incidence angle is set according to requirements), exposure intensity and time. After the preparation is completed, the diffracted emergent light K2 ' (including direction and wavelength) is jointly determined by K1 ' and Kv, namely K2 ' is equal to K1 ' -Kv, only when the wavelength and the incident angle of the incident light K1 ' fall within the characteristic wavelength range (a neighborhood range of the wavelength of the light wave adopted in the preparation) and the characteristic angle range (a neighborhood range of the incident angle determined by the grating vector Kv equal to K1-K2) of the grating, otherwise, the incident light can be regarded as not influenced by the existence of the grating and directly passes through the grating in a transparent mode. The VHG can be attached to the optical waveguide after preparation, or a grating preparation film is attached to the optical waveguide first and then prepared by coherent light interference. The characteristic angle range and the characteristic wavelength range of the prepared grating are related to the parameters of the basic refractive index n, the refractive index modulation degree delta n, the film thickness d, the exposure intensity, the time and the like of the film.
The SRG has similar characteristics with respect to a characteristic wavelength range and a characteristic angle range as VHG, and is typically fabricated directly on an optical waveguide substrate by a photolithographic or imprint process. By selecting the substrate material and controlling parameters such as line spacing, groove depth, groove profile, groove filling rate, groove inclination angle and the like during processing, the customization of the characteristic wavelength range and the characteristic angle range of the grating is realized.
As shown in fig. 2, a schematic diagram of the propagation path of light in the optical waveguide is given. When the incident angle and the wavelength of the first light ray incident from the outside satisfy the preset conditions, the first light ray will be guided to the predetermined exit direction under the diffraction action of the diffraction grating 140 (prepared as a reflection grating), and the incident angle of the exit direction on the waveguide surface is not less than the critical angle of total reflection of the light ray in the waveguide, so as to ensure that the light ray can propagate in the waveguide in a total reflection manner until exiting from the side surface to the photoelectric conversion module. Since the second light does not satisfy the predetermined condition, the diffraction grating 140 cannot diffract the second light into the optical waveguide 130 for transmission. Since the optical waveguide is thin, typically about 1mm thick, light emitted from each pixel in the display module 110 can pass through the waveguide and vertically enter the diffraction grating, and the incident angle is designed to be outside the range of the incident angle under the preset condition, so that the light emitted from each pixel can pass through the diffraction grating 140 transparently. Therefore, by covering the diffraction grating and the optical waveguide on the display plane of the display module 110, the incident light within a specific angle and a specific wavelength range from the outside can be guided to the photoelectric conversion module for charging or wireless communication, and the effect of normal watching of the screen display by human eyes is not affected.
Example two
The second embodiment of the present application provides a display module, which includes a display module 210, an optical waveguide 230, a diffraction grating 240, and photoelectric conversion modules 2201 and 2202. Referring to fig. 3, the difference between the second embodiment and the first embodiment is two points: the first is the position of the diffraction grating, the optical waveguide and the display module, and the optical waveguide 230 is located between the diffraction grating 240 and the display module 210 in the second embodiment; the other is the number of the photoelectric conversion modules, and the display module in the second embodiment includes two photoelectric conversion modules 2201 and 2202, which are respectively located at two sides of the display module 210.
As shown in fig. 4, a schematic view of a propagation path of light in the display module according to the second embodiment is shown. The diffraction grating 240 is made into a transmission grating, the incident angle and the wavelength of the externally incident third light satisfy preset conditions, and under the diffraction action of the diffraction grating 240, the third light is guided to a predetermined exit direction, which makes the incident angle of the third light on the surface of the optical waveguide 230 not less than the critical angle of total reflection of the light in the optical waveguide 230, that is, the angle of the first threshold value, so as to ensure that the third light can propagate in the optical waveguide in a total reflection manner until exiting from the side surface to the photoelectric conversion module 2201 or 2202. Since the optical waveguide is thin, typically about 1mm thick, light emitted from each pixel point in the display module 210 can be considered to pass through the waveguide and be vertically incident on the diffraction grating, and the incident angle is designed to be outside the range of the incident angle of the preset condition, so that the light can pass through the diffraction grating 240. Therefore, by covering the diffraction grating and the optical waveguide on the display plane of the display module 210, the incident light at a specific external angle and in a specific wavelength range can be guided to the photoelectric conversion module 2201 or 2201 for charging or wireless communication, and the effect of normally watching the screen display by human eyes is not affected.
It should be understood that the light acquired by the display module in the embodiments of the present invention from the outside may be ambient light, such as sunlight, light, and the like, or may be light emitted by a special wireless optical charging device or a wireless optical communication device. The wavelength ranges and incident angles of light from different light sources may have a certain difference, and in order to enable the display module to absorb light incident from the outside, the wavelength and angle of light incident from the outside of the display module need to fall within the wavelength and angle ranges in which the diffraction grating in the display module can perform diffraction. The characteristic wavelength range and the characteristic angle range of the diffraction grating are a part of the wavelength range and the incident angle range of the ambient light source through customization of the diffraction grating, but are not overlapped with the light-emitting wavelength range and the incident angle range of the display module, so that normal display of a screen cannot be influenced, and meanwhile, the utilization rate of ambient light can be improved. Obviously, on the premise that the light-emitting range of the display module has no overlapping region as much as possible, the wider the characteristic wavelength range and the characteristic angle range of the diffraction grating, the greater the utilization rate of the display module to ambient light.
As shown in fig. 5, for a diffraction grating for ambient light absorption, a wider characteristic wavelength range can be designed, and accordingly, a characteristic angle range tends to be narrower, so that absorption of ambient light in a wider wavelength band can be achieved, for example, the diffraction grating is designed as a transmissive type bulk grating.
Fig. 6 provides another diffraction grating for wireless optical charging or wireless optical communication, with a narrow wavelength range but a wide angular range, such as a reflective bulk grating. Because the light emitted by the light emitter generally has a narrow line width, such as a monochromatic laser, and has a certain emission angle range. In this case, the operating wavelength range of the photoelectric conversion module is usually narrower to maintain high photoelectric conversion efficiency.
The wavelength range and angular range of a single diffraction grating may be relatively small for light sources available to the display module, e.g., the spectrum of sunlight is broad and the range of possible angles of incidence is relatively large. In this case, two or more diffraction gratings may be used, each having a different characteristic wavelength range or characteristic angle range, so that a larger wavelength range or a larger range of incident angles of incident light can be used.
EXAMPLE III
As shown in fig. 7, the display module includes a display module 310, a photoelectric conversion module 320, an optical waveguide 330, and diffraction gratings 3401 and 3402. The diffraction gratings 3401 and 3402 are laid under the optical waveguide 330 in a tiled and non-overlapping manner, close to the surface of the optical waveguide 330 of the display module 310, and the characteristic wavelength ranges or characteristic angle ranges of the diffraction gratings 3401 and 3402 are not the same.
Example four
As shown in fig. 8, the display module includes a display module 410, photoelectric conversion modules 4201 and 4202, an optical waveguide 430, and diffraction gratings 4401 and 4402. The diffraction gratings 4401 and 4402 are covered on the optical waveguide 430 in a tiled and non-overlapping manner, and are far away from the surface of the optical waveguide 430 of the display module 410, and the characteristic wavelength ranges or the characteristic angle ranges of the diffraction gratings 4401 and 4402 are different.
EXAMPLE five
As shown in fig. 9, the display module includes a display module 510, an optical waveguide 530, photoelectric conversion modules 5201 and 5202, and diffraction gratings 5401 and 5402. The diffraction gratings 5401 and 5402 are covered on two sides of the optical waveguide 530 in a tiled manner, the diffraction gratings 5401 and 5402 completely cover the upper and lower surfaces of the optical waveguide 530, the diffraction grating 5401 is located between the optical waveguide 530 and the display module 510, and the diffraction grating 5402 is located above the optical waveguide 530 and on the surface of the optical waveguide 530 far away from the display module 510. And the characteristic wavelength ranges or characteristic angle ranges of the diffraction gratings 5401 and 5402 are different.
EXAMPLE six
As shown in fig. 10, the display module includes a display module 610, an optical waveguide 630, photoelectric conversion modules 6201 and 6202, and diffraction gratings 6401 and 6402. Diffraction gratings 6401 and 6402 are employed to be sequentially stacked on top of the light guide 630 at the surface of the light guide 630 remote from the display module 610. And the characteristic wavelength ranges or characteristic angle ranges of the diffraction gratings 6401 and 6402 are different.
EXAMPLE seven
As shown in fig. 11, the display module includes a display module 710, an optical waveguide 730, photoelectric conversion modules 7201 and 7202, and diffraction gratings 7401, 7402, 7403, and 7404. Diffraction gratings 7401 and 7402 are sequentially stacked on a lower surface of the optical waveguide 730, the diffraction gratings 7401 and 7402 are located between the display module 710 and the optical waveguide 730, and diffraction gratings 7403 and 7404 are sequentially stacked on an upper surface of the optical waveguide 730, on a surface of the optical waveguide 730 remote from the display module 710. And the characteristic wavelength ranges or characteristic angle ranges of the diffraction gratings 7401, 7402, 7403, and 7404 are different.
Fig. 12 is a schematic view of wavelength-angle mapping of the display module shown in fig. 11. The characteristic wavelength-characteristic angle ranges corresponding to the diffraction grating 7401-7404 in fig. 11 are the diffraction ranges 1-4 in fig. 12, wherein the wavelength ranges of the diffraction ranges 1-3 are wider and the angle ranges are narrower, which is beneficial for the display module to absorb the ambient light source; the wavelength range of the diffraction range 4 is narrow, the angle range is wide, and the display module is favorable for absorbing light emitted by the light emitter.
Example eight
Fig. 13 is a schematic structural diagram of a display module according to an eighth embodiment of the present application, and fig. 14 is a schematic propagation path diagram of light in the display module shown in fig. 13.
The diffraction grating 8401 and the diffraction grating 8402 are stacked to guide external light of different wavelength ranges to the photoelectric conversion modules at different positions. The characteristic wavelength range and the characteristic angle range of the diffraction grating 8401 are adapted to visible light, the visible light in the ambient light can be guided into the optical waveguide 830, and the incident direction of the visible light when the visible light is guided into the optical waveguide 830 enables the visible light to be transmitted toward the position of the photoelectric conversion module 8201 in the optical waveguide 830 and finally received by the photoelectric conversion module 8201. The characteristic wavelength range and the characteristic angle range of the diffraction grating 8402 are adapted to the infrared laser light, the infrared laser light generated by the infrared laser generator can be guided into the optical waveguide 830, and the infrared laser light is transmitted toward the position of the photoelectric conversion module 8202 in the optical waveguide 830 in the incident direction when being guided into the optical waveguide 830, and is finally received by the photoelectric conversion module 8202.
The photoelectric conversion module may typically be specifically optimized for a narrower wavelength band, thereby achieving higher efficiency. For example, the efficiency of a general solar cell is usually only ten percent or twenty percent, because a broad spectrum from ultraviolet light, visible light to infrared light is considered, but the efficiency of a laser cell dedicated to a specific waveband can be fifty or sixty percent, the incident light intensity is beneficial to efficiency improvement, but more importantly, efficiency optimization is easily achieved for a single waveband, because the absorption efficiency of an absorption material of a photosensitive unit in a photoelectric conversion module is the highest for light of the specific waveband. Based on this principle, this application embodiment eight is through adopting the multilayer diffraction grating to lead the external light in different wavelength ranges respectively to a plurality of different positions to improve the pertinence of photoelectric conversion module receipt light, finally improve the light utilization ratio. The external light rays with different wavelength ranges can be in the same incident direction or can be incident into the diffraction optical waveguide from different directions, and can be guided to different preset directions through diffraction gratings with different structures.
It should be understood that, since the characteristic wavelength ranges or the characteristic incident angle ranges of the plurality of diffraction gratings may be different, and the operating wavelength range of each of the at least one photoelectric conversion module is different, the characteristic wavelength ranges of the plurality of diffraction gratings in the display module may correspond to the operating wavelength ranges of the plurality of photoelectric conversion modules one to one. Alternatively, the characteristic wavelength ranges of the plurality of diffraction gratings may correspond to the operating wavelength range of one photoelectric conversion module. In the embodiment of the present application, there is no specific limitation as long as the operating wavelength range of the photoelectric conversion module covers the characteristic wavelength range of the corresponding diffraction grating.
As shown in fig. 13 and 14, the diffraction grating 8401 and the diffraction grating 8402 have different structures, and light rays satisfying the characteristic wavelength range and the characteristic incident angle range of the diffraction grating 8401 and the diffraction grating 8402 may be incident on the optical waveguide 830 and propagate in different directions after being diffracted by the diffraction grating 8401 or the diffraction grating 8402, for example, visible light propagates in the left-right direction, and infrared light propagates in the front-back direction. Photoelectric conversion modules corresponding to the working wavelength range are placed at corresponding positions around the display module, for example, the photoelectric conversion modules 8201 corresponding to the visible light band are placed on the left side and the right side of the display module, and the photoelectric conversion modules 8202 corresponding to the infrared light band are placed on the front side and the rear side of the display module, so that photoelectric conversion with higher efficiency can be realized.
It should be understood that, in the embodiments of the present application, the photoelectric conversion module corresponding to a specific wavelength band may also have response in other wavelength bands, and may also implement photoelectric conversion, but the efficiency may be relatively low.
Example nine
Fig. 15 is a schematic diagram of a terminal device according to a ninth embodiment of the present application, and here, the terminal device is taken as a mobile phone for description.
As shown in fig. 15, the terminal device includes a housing 20 and a display module 10, and the display module 10 is mounted on the housing 20. The terminal device further includes an electronic component (not shown in the figure) disposed inside the housing, and the electronic component includes, but is not limited to, a processor, a camera, a flash, a microphone, a battery, and the like.
Optionally, the display module 10 may be any one of the display modules in the first to eighth embodiments.
The housing may be a metal housing, such as a metal such as magnesium alloy, stainless steel, etc. In addition, the housing may be a plastic housing, a glass housing, a ceramic housing, or the like, but is not limited thereto.
The terminal device in the embodiment of the application can be a mobile phone, a tablet computer, a notebook computer, an intelligent bracelet, an intelligent watch, an intelligent helmet, intelligent glasses and other terminal devices. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a terminal device in a 5G network, or a terminal device in a Public Land Mobile Network (PLMN) for future evolution, and the like, which is not limited in this embodiment of the present application.
Fig. 16 is a schematic structural diagram of a display module that can be applied to any one of the first to ninth embodiments, and that is based on an organic light-emitting diode (OLED) stacked by using a liquid crystal structure, and that includes a substrate, and a metal anode, a hole transport layer, an organic light-emitting layer, an electron transport layer, and a metal cathode are sequentially stacked on the substrate, and when a voltage is applied between the metal anode and the metal cathode, the display module can emit light, thereby displaying contents.
The substrate can be made of materials with good optical transparency, such as glass or optical plastics, and is used for supporting the whole display structure; the metal anode is used to eliminate electrons (increase electron "holes") when current flows through the device; the hole transport layer is made of organic material molecules that are used to transport "holes" from the metal anode; the organic light-emitting layer is composed of organic material molecules (different from the conductive layer), and the light-emitting process is carried out on the layer; the electron transport layer is made up of molecules of organic material that transport "electrons" from the metal cathode. The metal cathode is used to inject electrons into the circuit when current flows through the cathode.
It should be understood that the application is only an OLED display module for example, but not limited to the application scenario of the technical solution of the application, and may also be an LED display module or other display modules.
Optionally, the optical waveguide in each of the above embodiments may replace the substrate in fig. 16 to realize a substrate function, so that the thickness of the display module may be reduced. It is to be understood that, in this case, the display modules in the above-described embodiments one to nine include other structures than the substrate in fig. 16.
It is clear to a person skilled in the art that the descriptions of the embodiments provided in the present application may be referred to each other, and for convenience and brevity of description, for example, the functions and steps of the apparatuses and the devices provided in the embodiments of the present application may be referred to the relevant descriptions of the method embodiments of the present application, and the method embodiments and the apparatus embodiments may be referred to each other.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be through some interfaces, indirect coupling or communication connection between devices or units, and may be in an electrical or other form.
The above description is only for the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. A display module, comprising:
a display module for displaying an image;
an optical waveguide positioned above a display plane of the display module;
at least one photoelectric conversion module located at the periphery of the display module and used for receiving the light transmitted in the optical waveguide;
at least one of the first group of diffraction gratings or the second group of diffraction gratings is used for guiding a first part of light rays with the wavelength within a preset wavelength range into the optical waveguide, wherein the incident angle of the light rays emitted from the outside of the display module to the display plane of the display module is within a preset incident angle range;
emitting at least part of light rays emitted from the display module to the first or second diffraction gratings, wherein the incident angle of the at least part of light rays is not within the preset incident angle range, or the wavelength of the at least part of light rays is not within the preset wavelength range, so that the at least part of light rays penetrates through the at least one of the first or second diffraction gratings and the optical waveguide and is emitted to the outside of the display module;
the optical waveguide is used for receiving the light transmitted by the optical waveguide;
wherein the first set of diffraction gratings comprises one or more diffraction gratings and is located between the optical waveguide and the display module, the second set of diffraction gratings comprises one or more diffraction gratings and the optical waveguide is located between the second set of diffraction gratings and the display module.
2. The display module of claim 1, wherein the first set of diffraction gratings comprises a plurality of diffraction gratings arranged in a stacked or tiled arrangement, or wherein the second set of diffraction gratings comprises a plurality of diffraction gratings arranged in a stacked or tiled arrangement.
3. The display module of claim 1,
at least one diffraction grating of the first set of diffraction gratings or the second set of diffraction gratings guides a second part of the first part of the light rays, which has a wavelength within an operating range of at least a part of the at least one photoelectric conversion module, into the optical waveguide at a specific angle, and the specific angle enables the second part of the light rays to be transmitted in a direction toward the at least part of the photoelectric conversion module in the optical waveguide.
4. The display module of claim 3, wherein the characteristic wavelength range of the at least one diffraction grating corresponds one-to-one to the operating range of the particular one or more photoelectric conversion modules.
5. The display module of claim 1 wherein the diffraction grating is a surface relief grating or a volume holographic grating.
6. The display module of claim 1, wherein the optical waveguide covers an entire display plane of the display module.
7. The display module of claim 6, wherein the optical waveguide is a substrate of the display module.
8. The display module as recited in claim 1 wherein said at least one photoelectric conversion module is further configured to convert light energy of said first portion of light into electrical energy or convert light-carried information of said first portion of light into electrical-carried information.
9. A terminal device, characterized in that it comprises at least one display module according to any one of claims 1 to 8.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010004364.2A CN113079228B (en) | 2020-01-03 | 2020-01-03 | Terminal equipment and display module |
| PCT/CN2020/135684 WO2021135892A1 (en) | 2020-01-03 | 2020-12-11 | Terminal device and display module |
| CN202080085099.3A CN114787899A (en) | 2020-01-03 | 2020-12-11 | Terminal equipment and display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010004364.2A CN113079228B (en) | 2020-01-03 | 2020-01-03 | Terminal equipment and display module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113079228A CN113079228A (en) | 2021-07-06 |
| CN113079228B true CN113079228B (en) | 2022-09-23 |
Family
ID=76608618
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010004364.2A Active CN113079228B (en) | 2020-01-03 | 2020-01-03 | Terminal equipment and display module |
| CN202080085099.3A Pending CN114787899A (en) | 2020-01-03 | 2020-12-11 | Terminal equipment and display module |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080085099.3A Pending CN114787899A (en) | 2020-01-03 | 2020-12-11 | Terminal equipment and display module |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN113079228B (en) |
| WO (1) | WO2021135892A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102884641A (en) * | 2010-03-16 | 2013-01-16 | 皇家飞利浦电子股份有限公司 | Photovoltaic cell device with switchable lighting/reflection |
| CN103714748A (en) * | 2012-10-09 | 2014-04-09 | 东莞万士达液晶显示器有限公司 | Display device |
| CN108089262A (en) * | 2018-01-04 | 2018-05-29 | 中国人民解放***箭军工程大学 | A kind of chip type integrated optics antenna for laser communication |
| CN110146989A (en) * | 2019-05-21 | 2019-08-20 | 京东方科技集团股份有限公司 | Optical waveguide components and its display methods, display device and its display methods |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120037081A (en) * | 2010-10-11 | 2012-04-19 | 이서영 | Planar light concentrator |
| CN102305959B (en) * | 2011-09-05 | 2013-09-11 | 上海交通大学 | Focusing system having grating structure |
| EP2838095A1 (en) * | 2013-08-15 | 2015-02-18 | CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement | Light harvesting photovoltaic device |
| US9341883B2 (en) * | 2014-02-07 | 2016-05-17 | Himax Display, Inc. | Display module and light guide device |
| US9494799B2 (en) * | 2014-09-24 | 2016-11-15 | Microsoft Technology Licensing, Llc | Waveguide eye tracking employing switchable diffraction gratings |
| CN104331188B (en) * | 2014-11-06 | 2018-01-09 | 深圳市华星光电技术有限公司 | A kind of touch module and mobile terminal |
| CN105554185B (en) * | 2015-11-27 | 2019-02-01 | 努比亚技术有限公司 | Solar recharging system and mobile terminal |
| CN106707734A (en) * | 2016-12-16 | 2017-05-24 | 广东技术师范学院 | Smart watch, smart watch charger and communication system |
| CN109839738A (en) * | 2017-11-27 | 2019-06-04 | 北京灵犀微光科技有限公司 | Waveguide display device |
| CN110244482B (en) * | 2019-05-21 | 2022-07-19 | 华为技术有限公司 | Display assembly, display screen and electronic equipment |
-
2020
- 2020-01-03 CN CN202010004364.2A patent/CN113079228B/en active Active
- 2020-12-11 WO PCT/CN2020/135684 patent/WO2021135892A1/en active Application Filing
- 2020-12-11 CN CN202080085099.3A patent/CN114787899A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102884641A (en) * | 2010-03-16 | 2013-01-16 | 皇家飞利浦电子股份有限公司 | Photovoltaic cell device with switchable lighting/reflection |
| CN103714748A (en) * | 2012-10-09 | 2014-04-09 | 东莞万士达液晶显示器有限公司 | Display device |
| CN108089262A (en) * | 2018-01-04 | 2018-05-29 | 中国人民解放***箭军工程大学 | A kind of chip type integrated optics antenna for laser communication |
| CN110146989A (en) * | 2019-05-21 | 2019-08-20 | 京东方科技集团股份有限公司 | Optical waveguide components and its display methods, display device and its display methods |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021135892A1 (en) | 2021-07-08 |
| CN114787899A (en) | 2022-07-22 |
| CN113079228A (en) | 2021-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10579855B2 (en) | Display panel and electronic device | |
| CN108735786B (en) | Organic light emitting display panel and organic light emitting display device | |
| US20200134283A1 (en) | Lcd fingerprint recognition system, under-screen optical fingerprint recognition apparatus and electronic apparatus | |
| CN111399286A (en) | Display device and electronic apparatus | |
| CN111345013B (en) | Terminal | |
| CN111052139B (en) | Under-screen fingerprint identification device, LCD fingerprint identification system and electronic equipment | |
| US11508334B2 (en) | Display screen assembly, electronic device, and method for detecting distance between display area and detection objection | |
| CN111095288B (en) | Under-screen optical fingerprint identification device and system and liquid crystal display screen | |
| CN104755994A (en) | Display device | |
| CN111564119B (en) | Display screen assembly, manufacturing method thereof and electronic device | |
| CN110673398A (en) | Optical detection device, backlight module, display device and electronic equipment | |
| KR20200084968A (en) | Display device | |
| CN110187537A (en) | A kind of terminal | |
| CN113079228B (en) | Terminal equipment and display module | |
| CN114420876A (en) | Display panel and display device | |
| US11493796B2 (en) | Display screen module and terminal | |
| CN114373784A (en) | Display device and electronic apparatus | |
| CN107608122B (en) | Display screen, functional assembly and mobile terminal | |
| CN113099005B (en) | Electronic equipment | |
| CN112993184B (en) | Display substrate and display device | |
| US10591757B2 (en) | Display panel and display device including photoelectric conversion elements | |
| CN113130698A (en) | Light detection substrate, preparation method thereof and display device | |
| KR20210130332A (en) | Electronic device | |
| CN210573106U (en) | Optical detection device, backlight module, display device and electronic equipment | |
| CN212569806U (en) | Display module and electronic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |