WO2021036747A1 - Module d'affichage et dispositif électronique - Google Patents
Module d'affichage et dispositif électronique Download PDFInfo
- Publication number
- WO2021036747A1 WO2021036747A1 PCT/CN2020/107792 CN2020107792W WO2021036747A1 WO 2021036747 A1 WO2021036747 A1 WO 2021036747A1 CN 2020107792 W CN2020107792 W CN 2020107792W WO 2021036747 A1 WO2021036747 A1 WO 2021036747A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- substrate
- collimator
- image sensor
- display module
- light
- Prior art date
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
Definitions
- the present disclosure relates to the technical field of display devices, and in particular to a display module and electronic equipment.
- the fingerprint module is one of the core components of electronic equipment. With the continuous development of the electronic equipment industry, people have higher and higher performance requirements for the fingerprint module, which brings greater challenges to the structural design of the fingerprint module.
- the structure of the fingerprint module is relatively diverse.
- the optical fingerprint module that can be placed under the display screen can improve the appearance and texture of the electronic device. Therefore, this type of fingerprint module has been more and more widely used.
- There is a fingerprint recognition area on the display screen and the user can put his finger in the fingerprint recognition area, and the fingerprint module under the fingerprint recognition area can recognize the user's fingerprint information.
- the above-mentioned fingerprint module is usually set in a part of the electronic device, so the fingerprint recognition area of the display screen is small, and the user needs to place the finger in the designated fingerprint recognition area to realize the fingerprint recognition, which results in low fingerprint recognition efficiency.
- the present disclosure discloses a display module and electronic equipment to solve the problem of low fingerprint identification efficiency.
- a display module includes a first substrate, one side of the first substrate is provided with a collimator, an image sensor, a color filter layer and a black matrix, the color filter layer and the black matrix are arranged in the same layer ,
- the collimator, the image sensor, and the black matrix are arranged along a direction perpendicular to the first substrate, and the collimator and the image sensor are all located between the black matrix and the black matrix.
- the collimator is located between the image sensor and the first substrate.
- An electronic device includes the above-mentioned display module.
- the collimator, the image sensor, and the black matrix are arranged along a direction perpendicular to the first substrate.
- the black matrix has a relatively large area in the display module, so the collimator and the image
- the sensor can be distributed on a large area on the display module, so that the area of the fingerprint recognition area on the display module is enlarged, and the user can flexibly choose where to place the finger, thereby improving the efficiency of fingerprint recognition.
- FIG. 1 is a schematic diagram of a partial structure of an electronic device disclosed in some embodiments of the present disclosure
- Figure 2 is a partial enlarged view of part A in Figure 1;
- FIG. 3 is a schematic diagram of a photoelectric conversion unit in an electronic device disclosed in some embodiments of the disclosure.
- a display module which can be applied to electronic devices.
- the display module may specifically include a first substrate 120 and a second substrate 110, and the second substrate 110 and the first substrate 120 may be stacked.
- the side of the first substrate 120 facing the second substrate 110 is provided with a collimator 150, an image sensor 160, a color filter layer 130, and a black matrix 140.
- the color filter layer 130 and the black matrix 140 are arranged in the same layer.
- the color filter layer 130 may include multiple red filter layers, yellow filter layers, and blue filter layers.
- the filter layer and the blue filter layer can be arranged in an array.
- the black matrix 140 can fill the gaps between the adjacent groups of the red filter layer, the yellow filter layer and the blue filter layer, thereby shielding the wiring structure. Therefore, the distribution area of the black matrix 140 in the display module is relatively large. Large, it basically corresponds to the entire display area setting of the display module.
- the collimator 150, the image sensor 160, and the black matrix 140 are arranged along a direction perpendicular to the first substrate 120, and the collimator 150 and the image sensor 160 are both located between the black matrix 140 and the first substrate 120.
- the collimator 150 is located between the image sensor 160 and the first substrate 120.
- the collimator 150 is provided with a plurality of light passing holes, and the axis of the light passing holes may be perpendicular to the image sensor 160.
- the collimator 150 can control the light flux passing through the collimator 150 by using the principle of small hole imaging.
- the image sensor 160 can sense light, and can convert light signals into electrical signals.
- the display module further includes a transparent cover 170, a first polarizer 180, and a second polarizer 190.
- the first polarizer 180 is disposed on the side of the second substrate 110 away from the first substrate 120.
- the second polarizer 190 It is arranged on the side of the first substrate 120 away from the second substrate 110, and the transparent cover 170 is arranged on the side of the second polarizer 190 away from the first substrate 120.
- the light in the display module is reflected by the user's fingerprint.
- the fingerprint valley 310 and the fingerprint ridge 320 of the user's finger 300 have different reflection effects on the light, so the finger 300 reflects
- the light carries the user’s fingerprint information.
- the reflected light irradiates the image sensor 160 through the light hole of the collimator 150.
- the image sensor 160 senses the light signal, and then converts the light signal representing the fingerprint information into an electrical signal.
- the signal can be transmitted to the main board of the electronic device, and the main board can judge whether the obtained fingerprint information is consistent with the pre-stored fingerprint information, thereby judging whether the user's access operation is legal.
- the collimator 150, the image sensor 160, and the black matrix 140 are arranged along a direction perpendicular to the first substrate 120, and the disposition area of the black matrix 140 in the display module is Larger, so the collimator 150 and the image sensor 160 can be distributed on a large area on the display module, so that the area of the fingerprint recognition area on the display module is enlarged, and the user can flexibly choose where to place the finger 300, thereby improving fingerprint recognition effectiveness.
- the process of arranging the collimator 150 and the image sensor 160 in the display module is relatively simple. Therefore, when the collimator 150 and the image sensor 160 are arranged in a large area, the cost of the display module will not be too high.
- the display module may further include a light-transmitting flat layer 210, the light-transmitting flat layer 210 is located between the black matrix 140 and the first substrate 120, and the collimator 150 is disposed on one side of the light-transmitting flat layer 210
- the image sensor 160 is disposed on the other side of the light-transmitting flat layer 210, and the collimator 150 and the image sensor 160 are separated by the light-transmitting flat layer 210.
- the light-transmitting flat layer 210 can transmit light first, so light can pass through the light-transmitting flat layer 210 and enter the first substrate 120.
- the light-transmitting flat layer 210 can adjust the position of the collimator 150 relative to the image sensor 160.
- the light passing hole of the collimator 150 is more accurately perpendicular to the image sensor 160, thereby improving the accuracy of fingerprint recognition.
- the collimator 150 can be directly disposed on the surface of the light-transmitting flat layer 210, but since the collimator 150 has a certain thickness, the collimator 150 can be directly disposed on the surface of the light-transmitting flat layer 210. Increase the thickness of the entire display module.
- a concave portion may be provided on the surface of the transparent flat layer 210 facing away from the image sensor 160, and the collimator 150 is disposed in the concave portion.
- there is a gap between the collimator 150 and the image sensor 160 there is a gap between the collimator 150 and the image sensor 160, and the gap can be set as small as possible.
- the collimator 150 can make full use of the space occupied by the light-transmitting flat layer 210, and it basically does not occupy additional space. Thereby reducing the thickness of the display module.
- the recesses here can be formed by processes such as exposure.
- the image sensor 160 may be disposed on the surface of the transparent flat layer 210 that faces away from the collimator 150.
- the image sensor 160 may be formed on the surface of the light-transmitting flat layer 210 by coating or the like.
- the black matrix 140 is distributed in a large area in the display module. Therefore, the collimator 150 and the image sensor 160 can also correspond to the large area distribution of the black matrix 140, thereby further expanding the area of fingerprint recognition.
- the edge of the light-transmitting flat layer 210 is flush with the edge of the first substrate 120, that is, the shape and size of the light-transmitting flat layer 210 are the same as the shape of the first substrate 120.
- the size is basically the same, so there is no need to provide other structures on the same layer of the light-transmitting flat layer 210, and the purpose of simplifying the molding process is achieved.
- the center of the projection of the collimator 150 coincides with the center of the projection of the image sensor 160.
- the shape of the collimator 150 and the shape of the image sensor 160 can be the same. When the projection centers of the two coincide, the relative positions of the two are more accurate, which makes the arrangement of the collimator 150 and the image sensor 160 easier, thereby improving the fingerprint Accuracy of recognition.
- the number of the collimator 150 and the image sensor 160 can both be set to one, but this structure has higher requirements on the molding process. At the same time, the area of the single collimator 150 and the image sensor 160 is too large, and the utilization rate of some areas is low. , It will lead to the high cost of the display module.
- the number of the collimator 150 and the image sensor 160 can be set to multiple, and the multiple collimators 150 and the multiple image sensors 160 are arranged in a one-to-one correspondence along the direction perpendicular to the first substrate 120. Therefore, the collimator 150 and the image sensor 160 are easier to be formed, and the area of the two is appropriately reduced, thereby reducing the cost of the display module. Of course, this structure makes it easier to ensure the relative position between the relative collimator 150 and the image sensor 160, thereby improving the accuracy of fingerprint recognition.
- a single image sensor 160 may include only one photoelectric conversion unit.
- the image sensor 160 may include a plurality of photoelectric conversion units, and each photoelectric conversion unit is connected in series.
- the photoelectric conversion unit includes a photodiode 161 and a first thin film transistor 162, and the photodiode 161 is electrically connected to the first thin film transistor 162.
- the first thin film transistor 162 has a source (ie, S pole in the figure), a drain (ie, D pole in the figure), and a gate (ie, G pole in the figure), and the photodiode 161 is electrically connected to the source.
- the drain can be electrically connected with the data line, and the gate can be electrically connected with the gate line.
- the light reflected by the fingerprint can be projected onto the photodiode 161, causing the resistance value of the photodiode 161 to change, and a leakage current signal is generated.
- the photodiode 161 transmits the leakage current signal to the corresponding through the first thin film transistor 162 in the conductive state.
- the signal receiving unit to identify the fingerprint information.
- a second thin film transistor 220 is provided on the surface of the second substrate 110 facing the first substrate 120, and a liquid crystal layer 230 is provided between the second substrate 110 and the first substrate 120.
- the edge of the liquid crystal layer 230 With frame glue 240.
- the display module may be a liquid crystal display module, so as to achieve the purpose of setting the fingerprint identification structure under the screen of the liquid crystal display module.
- OLED Organic Light-Emitting Diode, organic light-emitting diode
- AMOLED Active-matrix organic light-emitting diode, active matrix organic light-emitting diode.
- Body display modules and other types of display modules.
- the electronic device may further include a backlight module 250.
- the backlight module 250 may be disposed on the side of the first polarizer 180 away from the second substrate 110, which may Lights up to provide a light source for the display module. Since the collimator 150 and the image sensor 160 are disposed between the backlight module 250 and the first substrate 120, the backlight module 250 will not affect the normal operation of the collimator 150 and the image sensor 160.
- the electronic device disclosed in some embodiments of the present disclosure may be a smart phone, a tablet computer, an e-book reader, or a wearable device.
- the electronic device may also be other devices, which is not limited in some embodiments of the present disclosure.
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- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Applications Claiming Priority (2)
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CN201910806928.1A CN110472617B (zh) | 2019-08-29 | 2019-08-29 | 显示模组及电子设备 |
CN201910806928.1 | 2019-08-29 |
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CN110472617B (zh) * | 2019-08-29 | 2021-10-12 | 维沃移动通信有限公司 | 显示模组及电子设备 |
CN110850622A (zh) | 2019-11-21 | 2020-02-28 | 京东方科技集团股份有限公司 | 显示面板及其制备方法、显示装置 |
CN111308767B (zh) * | 2019-11-27 | 2021-03-16 | 武汉华星光电技术有限公司 | 液晶显示模组 |
CN111095288B (zh) * | 2019-12-02 | 2023-09-05 | 深圳市汇顶科技股份有限公司 | 屏下光学指纹识别装置及***、液晶显示屏 |
CN111965883B (zh) * | 2020-08-06 | 2024-03-29 | 武汉华星光电技术有限公司 | 显示屏及其制造方法 |
CN114280835B (zh) * | 2020-09-27 | 2023-07-25 | 京东方科技集团股份有限公司 | 一种显示基板、显示装置及其补偿方法 |
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