WO2019033348A1 - Display module and electronic device - Google Patents

Abstract

Disclosed are a display module, and an electronic device comprising the display module. The display module comprises: a display apparatus comprising a display panel for executing image display, with a second light-transmitting region being provided in a display area of the display panel; and a photosensitive module arranged below the display panel and comprising a photosensitive panel for sensing a light signal transmitted from the second light-transmitting region so as to acquire predetermined biological feature information about a target object touching or approaching the display module, wherein the photosensitive panel comprises a plurality of photosensitive devices, and the photosensitive devices are located below the second light-transmitting region.

Description

Display module and electronic device Technical field

The utility model relates to a display module and an electronic device for sensing biological characteristic information.

Background technique

At present, biometric information sensors, especially fingerprint recognition sensors, have gradually become the standard components of electronic products such as mobile terminals. Since the optical fingerprint recognition sensor has stronger penetration ability than the capacitive fingerprint recognition sensor, an optical fingerprint recognition module applied to the mobile terminal has been proposed. As shown in FIG. 1, the optical fingerprint recognition module includes an optical fingerprint sensor 400 and a light source 402. The optical fingerprint sensor 400 is disposed under the protective cover 401 of the mobile terminal. The light source 402 is disposed adjacent to one side of the optical fingerprint sensor 400. When the user's finger F contacts the protective cover 401, the light signal emitted by the light source 402 passes through the protective cover 401 and reaches the finger F, is reflected by the valleys and ridges of the finger F, and is received by the optical fingerprint sensor 400, and A fingerprint image of the finger F is formed.

However, the above optical fingerprint recognition module can only be limited to a predetermined area of the mobile terminal, such as a non-display area of the mobile terminal, and must contact the predetermined area to perform fingerprint recognition, and the use is still limited. Therefore, it is necessary to propose a structure that can be set in the display area and realize fingerprint recognition of any area in the display area.

Utility model content

The embodiments of the present invention aim to at least solve one of the technical problems existing in the prior art. To this end, the embodiments of the present invention need to provide a display module and an electronic device.

The embodiment of the present invention provides a display module, including:

The display device includes a display panel for performing image display, and a second light transmissive area is disposed in the display area of the display panel;

The photosensitive module is disposed under the display panel and includes a photosensitive panel for sensing an optical signal emitted from the second transparent area to acquire a predetermined biological object that contacts or approaches the target object of the display module Feature information; the photosensitive panel includes a plurality of photosensitive devices, and the photosensitive device is located below the second light transmissive region.

Since the reflection of the optical signal is different in different parts of the target object, the optical signals sensed by the adjacent photosensitive devices in the photosensitive panel may be aliased, thereby causing the acquired biometric information to be blurred, so the embodiment of the present invention The sensing accuracy of the photosensitive module is improved by providing an anti-aliasing imaging element on the photosensitive panel.

In addition, the photosensitive module utilizes the optical signal emitted by the display device to sense the biometric information of the target object, thereby saving the light source and reducing the cost of the display module.

In some embodiments, the photosensitive device is disposed opposite or corresponding to the second light transmissive region. This ensures that the optical signal passing through the second light-transmitting region is received by the photosensitive device, thereby improving the sensing accuracy of the photosensitive module.

In some embodiments, the display panel includes a plurality of display pixels, and the second light transmissive region is disposed between adjacent display pixels.

The light signal reflected by the target object passes through the light-transmitting region between the adjacent display pixels, so that the display pixel is not used as the light-transmitting region, and the photosensitive device can sense the light signal emitted by the display pixel adjacent thereto. Improve the sensing accuracy of the photosensitive module.

In some embodiments, the display panel includes a plurality of transparent display pixels, and the plurality of transparent display pixels form the second light transmissive region.

The embodiment of the present invention utilizes the light transmittance of the display pixel to perform biometric information sensing on the target object; and the photosensitive surface of the photosensitive device can be equal to the area of the display pixel, so that the existing display panel structure can be used to realize the biological The feature information sensing reduces the sensing cost, and ensures that enough light signals in the optical signal passing through the display pixels are received by the photosensitive device, thereby improving the sensing accuracy of the photosensitive module.

In some embodiments, the light emitting side of the display panel is provided with a CF film, and the CF film includes three kinds of photoresists of red, green, and blue for filtering the optical signal emitted by the display pixel. Forming three kinds of light signals of red, green, and blue; the photosensitive device is located below the display pixel corresponding to the blue photoresist and/or the display pixel corresponding to the green photoresist.

Since the display panel is provided with a CF film, the display pixels are corresponding to three kinds of light signals of red, green and blue. Therefore, after the light signal reflected by the target object is filtered by the CF film, the corresponding red, green and blue colors are obtained. Kind of light signal. When ambient light hits a target object, such as a finger, red ambient light will penetrate the target object, and blue and green ambient light will be absorbed by the target object. Therefore, when the photosensitive device is located under the blue display pixel or the green display pixel, the interference of the ambient light can be eliminated, and the sensing precision of the photosensitive module to the target object is improved.

In some embodiments, the display pixels include three display pixels of red, green, and blue.

In some embodiments, the display panel further includes a microresonator structure corresponding to the display pixel; the photosensitive device is located below the red display pixel.

Since the display panel has a micro-resonator structure, when the optical signal reflected by the target object passes through the display unit, the red light signal is reflected back through the micro-vibration cavity structure at the red display pixel, and only the blue and green light signals are transmitted. Passing through, so that the red light signal that penetrates the target object in the ambient light can be effectively filtered, and the photosensitive device is displayed in red. Below the pixel, interference caused by red light signals in the ambient light can be avoided, and the sensing accuracy of the photosensitive module is improved.

In some embodiments, the photosensitive device is further located under the blue display pixel or the green display pixel, and the photosensitive device is provided with a filter film for using a predetermined wavelength band. The light signal is filtered, and the setting of the preset wavelength band differs depending on the placement position of the photosensitive device.

In some embodiments, the photosensitive device is located in any one or more of red, green, and blue display pixels; the photosensitive device is provided with a filter film for using a predetermined wavelength band Filtering is performed outside the optical signal.

In some embodiments, the photosensitive module further includes a filter film disposed on the photosensitive panel for filtering optical signals other than the preset wavelength band.

In the embodiment of the present invention, by setting the filter film, the interference of the ambient light is eliminated, and the sensing precision of the photosensitive module is improved.

In some embodiments, the photosensitive panel further includes a substrate, and the photosensitive device is disposed on the substrate.

In certain embodiments, the substrate is a silicon substrate, a metal substrate, a printed circuit board, or an insulating substrate.

In some embodiments, the display panel has a display area; the photosensitive panel is configured to perform biometric information sensing on a target object at any position within a display area of the display panel; or the photosensitive panel has sensing a region, and a shape of the sensing region is consistent with a shape of the display region, and a size of the sensing region is greater than or equal to a size of the display region.

In some embodiments, the photosensitive module further includes an anti-aliasing imaging element, the anti-aliasing imaging element being located between the display panel and the photosensitive panel for preventing reception by an adjacent photosensitive device The optical signal is aliased.

The embodiment of the present invention prevents the aliasing of the optical signals received by the adjacent photosensitive devices by providing an anti-aliasing imaging element on the photosensitive panel, thereby improving the sensing accuracy of the photosensitive module.

In some embodiments, the anti-aliasing imaging element includes a light absorbing wall and a plurality of first light transmissive regions surrounded by a light absorbing wall, the light sensing device corresponding to at least one of the first light transmitting regions.

In some embodiments, the first light transmissive regions are evenly distributed. The evenly distributed light-transmissive region makes the preparation process of the anti-aliasing imaging element simpler.

In some embodiments, the light absorbing wall comprises a plurality of light absorbing blocks and height blocks arranged in an alternating stack. The light-absorbing wall is formed by stacking the height blocks and the light-absorbing blocks, which speeds up the process of the anti-aliasing imaging element and ensures the anti-aliasing effect of the anti-aliasing imaging element.

In certain embodiments, the height block is made of a transparent material.

In some embodiments, the first light transmissive region is filled with a transparent material. Filling through the first light transmissive area The transparent material not only increases the strength of the anti-aliasing imaging element, but also prevents impurities from entering the first light-transmitting region and affecting the light-transmitting effect.

In some embodiments, the anti-aliasing imaging element comprises a plurality of layers of light absorbing layers and transparent support layers arranged alternately; the light absorbing layer comprises a plurality of spaced apart light absorbing blocks; the transparent supporting layer is filled with a transparent material Forming, and filling the interval between the light absorbing blocks together; wherein the area corresponding to the interval forms a first light transmitting area, and the photosensitive device corresponds to at least one of the first light transmitting areas.

By alternately stacking the light absorbing layer and the transparent supporting layer, the preparation of the anti-aliasing imaging element is made simpler, and the anti-aliasing effect of the anti-aliasing imaging element is ensured.

In certain embodiments, the thickness of each of the transparent support layers is unequal.

In certain embodiments, the thickness of the transparent support layer increases layer by layer.

By setting the thickness of the transparent supporting layer, the optical signal outside the predetermined angular range offset from the vertical direction of the substrate is prevented from passing through the anti-aliasing imaging element, thereby improving the anti-aliasing effect of the anti-aliasing imaging element.

In some embodiments, the anti-aliasing imaging element is formed directly on the photosensitive panel; or the anti-aliasing imaging element is separately formed and then disposed on the photosensitive panel.

In some embodiments, the display panel includes a plurality of display pixels, and the display device further includes a display driving circuit for driving the plurality of display pixels to emit light for use as the photosensitive module for light sensing. The light source at the time.

An embodiment of the present invention provides an electronic device including the display module of any of the above embodiments.

In some embodiments, the electronic device further includes a protective cover for being touched by a target object when the electronic device performs biometric information sensing.

In some embodiments, the electronic device further includes a touch sensor for determining a touch area of the target object when the target object contacts the protective cover for the electronic device to be in the Biometric information sensing is performed within the touch area.

In some embodiments, the touch sensor is either integrated with the protective cover or integrated with a photosensitive panel in the display module or integrated with a display panel in the display module.

Since the electronic device has the display module of any of the above structures, it has all the beneficial effects of the above display module.

The additional aspects and advantages of the embodiments of the invention will be set forth in part in the description in the written description

DRAWINGS

The above and/or additional aspects and advantages of the embodiments of the invention will be apparent from the

1 is a schematic diagram of an optical sensing structure applied to an electronic device in the prior art;

2 is a partial structural schematic view of a photosensitive panel according to an embodiment of the present invention;

3 is a schematic diagram of optical signals that the anti-aliasing imaging element can pass through in the photosensitive module shown in FIG. 2;

4 is a partial structural schematic view of an anti-aliasing imaging element according to an embodiment of the present invention;

FIG. 5 is a partial schematic structural view of an anti-aliasing imaging element according to another embodiment of the present invention; FIG.

Figure 6 is a schematic view showing the preparation process of the anti-aliasing imaging element shown in Figure 5;

7 is a partial structural schematic view of an anti-aliasing imaging element according to still another embodiment of the present invention;

8 is a partial structural schematic view of a photosensitive module according to another embodiment of the present invention;

9 is a block diagram showing the structure of a photosensitive device according to an embodiment of the present invention;

Figure 10 is a schematic structural view of an embodiment of the photosensitive unit shown in Figure 9;

11 is a schematic structural view of another embodiment of the photosensitive unit shown in FIG. 9;

FIG. 12 is a partial schematic structural view of a display module according to an embodiment of the present invention; FIG.

13 is a partial structural schematic view of a display panel in the display module shown in FIG. 12;

14 is a schematic diagram showing relative positions of a photosensitive device and a display pixel in a display module according to an embodiment of the present invention;

15 is a schematic diagram showing relative positions of a photosensitive device and a display pixel in a display module according to still another embodiment of the present invention;

16 is a schematic diagram showing relative positions of a photosensitive device and a display pixel in a display module according to still another embodiment of the present invention;

17 is a schematic diagram showing relative positions of a photosensitive device and a display pixel in a display module according to still another embodiment of the present invention;

18 is a schematic diagram showing a correspondence relationship between a display area of a display panel and a sensing area of the photosensitive panel according to an embodiment of the present invention;

19 is a schematic diagram of a front view of a display module applied to an electronic device according to an embodiment of the present invention;

20 is a cross-sectional structural view of the electronic device of FIG. 19 taken along line I-I, in which only a partial structure of the electronic device is shown.

Detailed ways

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. . Thus, features defining "first" or "second" may include one or more of the described features either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is two or more unless specifically and specifically defined otherwise. "Contact" or "touch" includes direct or indirect contact. For example, the photosensitive module and the display module disclosed in the following are disposed inside the electronic device, such as under the protective cover, and the user's finger indirectly contacts the photosensitive module and the display module through the protective cover.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be, for example, a fixed connection or a Disassembling the connection, or connecting integrally; may be mechanical connection, electrical connection or communication with each other; may be directly connected, or may be indirectly connected through an intermediate medium, may be internal communication of two elements or mutual interaction of two elements Role relationship. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of the specific examples are described below. Of course, they are merely examples and are not intended to limit the invention. In addition, the present invention may repeat reference numerals and/or reference numerals in different examples, which are for the purpose of simplicity and clarity, and do not in themselves indicate the relationship between the various embodiments and/or settings discussed. Moreover, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the use of other processes and/or the use of other materials.

Further, the described features, structures may be combined in one or more embodiments in any suitable manner. In the following description, numerous specific details are set forth However, those skilled in the art will appreciate that the technical solution of the present invention may be practiced without one or more of the specific details or other structures, components, and the like. In other instances, well-known structures or operations are not shown or described in detail to avoid obscuring the invention.

The embodiment of the present invention provides a photosensitive module for sensing an optical signal reflected by a target object when a target object contacts or approaches the photosensitive module, and converts the sensed optical signal For the corresponding electrical signal, predetermined biometric information of the target object is acquired based on the converted electrical signal.

In some embodiments, please refer to FIG. 2 , which illustrates a partial structure of a photosensitive module according to an embodiment of the present invention. The photosensitive module 2 includes a photosensitive device 20 (see FIG. 9) and an anti-aliasing imaging element 28. The photosensitive device 20 further includes a photosensitive panel 200 including a substrate 26 and a plurality of photosensitive cells 22 disposed on the substrate 26. The plurality of photosensitive cells 22 are for sensing an optical signal and converting the sensed optical signal into a corresponding electrical signal. The photosensitive device 20 is advanced for converting the sensed light signal into an electrical signal, and acquiring predetermined biometric information of the target object contacting or approaching the photosensitive panel 200 based on the converted electrical signal. The anti-aliasing imaging element 28 is disposed above the photosensitive panel 200 for preventing aliasing of optical signals received between adjacent photosensitive cells 22. Further, the anti-aliasing imaging element 28 includes a plurality of first light-transmitting regions 282 through which light signals are passed, and a plurality of photosensitive cells 22 are disposed under the plurality of first light-transmitting regions 282.

The biometric information of the target object is, for example but not limited to, skin texture information such as fingerprints, palm prints, ear prints, and soles, and other biometric information such as heart rate, blood oxygen concentration, and veins. The target object, such as but not limited to a human body, may also be other suitable types of objects.

The photosensitive module 2 of the embodiment of the present invention is provided with an anti-aliasing imaging element 28 on the photosensitive panel 200 provided with the photosensitive unit 22, and the photosensitive unit 22 is disposed corresponding to the first light-transmitting region 282 of the anti-aliasing imaging element 28. Therefore, the biometric information obtained by the photosensitive unit 22 after performing the light sensing is relatively clear, thereby improving the sensing accuracy of the photosensitive device 20.

In some embodiments, the photosensitive unit 22 is disposed opposite to the first light-transmitting region 282, so that the light signals passing through the first light-transmitting region 282 are all received by the photosensitive unit 22, which improves the sensing of the photosensitive device 20. Precision.

In some embodiments, the anti-aliasing imaging element 28 has light absorbing properties that illuminate the optical signal on the anti-aliasing imaging element 28, only the optical signal that is approximately perpendicular to the substrate 26 can be removed from the anti-aliasing imaging element 28. The first light transmissive region 282 passes through to be received by the photosensitive unit 22, and the remaining optical signals are absorbed by the anti-aliasing imaging element 28. In this way, aliasing of the optical signals received between the adjacent photosensitive cells 22 can be prevented. It should be noted that the optical signal that is approximately perpendicular to the substrate 26 includes an optical signal that is perpendicular to the substrate 26 and that is offset from the vertical direction of the substrate 26 by an optical signal within a predetermined range of angles. The preset angle range is within ±20°.

In some embodiments, as shown in FIG. 3, FIG. 3 illustrates a range of optical signals that pass through the anti-aliasing imaging element 28. Due to the light absorption characteristics of the anti-aliasing imaging element 28, only the optical signal between the optical signal L1 and the optical signal L2 can pass through the first light-transmitting region 282 to the photosensitive unit 22, and the remaining optical signals are absorbed by the anti-aliasing imaging element 28. Wall 281 is absorbed. As can be seen from FIG. 3, the smaller the cross-sectional area of the first light-transmitting region 282, the smaller the range of the angle α of the light signal passing through the first light-transmitting region 282, and therefore the anti-aliasing effect of the anti-aliasing imaging element 28 is better. . As such, the anti-aliasing effect of the anti-aliasing imaging element 28 can be improved by the smaller area of the first light-transmitting region 282 provided by the anti-aliasing imaging element 28. In addition, since the cross-sectional area of the first light-transmitting region 282 of the anti-aliasing imaging element 28 is small, Therefore, each photosensitive unit 22 will correspond to the plurality of light-transmissive first light-transmitting regions 282, so that the photosensitive unit 22 can sense sufficient light signals, and the sensing accuracy of the photosensitive module 2 is improved.

In some embodiments, with continued reference to FIG. 2, the anti-aliasing imaging element 28 includes a light absorbing wall 281 formed by the light absorbing walls 282. The light absorbing wall 281 is formed of a light absorbing material. The light absorbing material includes a metal oxide, a carbon black paint, a black ink, and the like. Wherein the metal in the metal oxide is, for example but not limited to, one of chromium (Cr), nickel (Ni), iron (Fe), tantalum (Ta), tungsten (W), titanium (Ti), molybdenum (Mo) or Several. The axial direction of the first light-transmitting region 282 extends in a direction perpendicular to the substrate 26 such that an optical signal in a direction approximately perpendicular to the substrate 26 can pass through the first light signal that is incident on the anti-aliasing imaging element 28. In the light transmitting region 282, the remaining light signals are absorbed by the light absorbing wall 281.

Further, please refer to FIG. 4. FIG. 4 shows the structure of the anti-aliasing imaging element 28 of an embodiment of the present invention. The light absorbing wall 281 has a multi-layer structure, and the light absorbing wall includes a light absorbing block 281a and a height block 281b which are alternately stacked. In one embodiment, the light absorbing block 281a is formed of a light absorbing material. The light absorbing material is, for example but not limited to, a metal oxide, a carbon black paint, a black ink, or the like. Wherein the metal in the metal oxide is, for example but not limited to, one of chromium (Cr), nickel (Ni), iron (Fe), tantalum (Ta), tungsten (W), titanium (Ti), molybdenum (Mo) or Several. The height block 281b is, for example but not limited to, a transparent layer formed of a transparent material such as a translucent material, a light absorbing material, or the like.

In some embodiments, a plurality of light absorbing blocks 281a located in the same layer are spaced apart, and a region corresponding to the interval 283b between the light absorbing blocks 281a in the same layer is the first light transmitting region 282. Further, the plurality of light absorption blocks 281a and the plurality of height blocks 281b of the same layer may be fabricated at one time. Specifically, by providing a mask, the mask is an integrally formed diaphragm, and the diaphragm forms an opening corresponding to the position of the light absorbing block 281a, and the shape and size of the opening are consistent with the shape and size of the light absorbing block 283. . The light absorbing block 281a and the height block 281b which are alternately disposed are sequentially vapor-deposited on a carrier by the mask, thereby forming the anti-aliasing imaging element 28.

By the arrangement of the padding block 281b, not only the process of the anti-aliasing imaging element 28 is accelerated, but also the anti-aliasing effect of the anti-aliasing imaging element 28 can be ensured by the height setting of the padding block 281b.

In some embodiments, the first light-transmissive region 282 can be filled with a transparent material to increase the strength of the anti-aliasing imaging element layer, and impurities can be prevented from entering the first light-transmitting region 282 to affect the light-transmitting effect. In order to ensure the light transmissive effect of the first light-transmitting region 282, a material having a relatively high light transmittance such as glass, PMMA (acrylic), PC (polycarbonate) or the like may be selected as the transparent material.

In some embodiments, please refer to FIG. 5, which illustrates the structure of an anti-aliasing imaging element of another embodiment of the present invention. The anti-aliasing imaging element 28 is of a multi-layer structure, and the anti-aliasing imaging element 28 includes a light absorbing layer 283 and a transparent supporting layer 284 which are alternately stacked; the light absorbing layer 283 includes a plurality of spaced light absorbing blocks 283a; The transparent support layer 284 is formed by filling a transparent material, and filling the interval 283b between the light absorption blocks 283a; The region corresponding to the interval 283b forms the first light-transmitting region 282.

Further, please refer to FIG. 6. FIG. 6 illustrates a process of preparing an anti-aliasing imaging element according to an embodiment of the present invention. Specifically, in preparing the anti-aliasing imaging element 28, a light-absorbing material is first coated on a carrier, and a corresponding portion of the first light-transmitting region 282 is etched away on the light-absorbing material layer, which is not etched. A plurality of light absorbing blocks 283a are partially formed. The etching technique is, for example but not limited to, photolithography, X-ray etching, electron beam etching, and ion beam etching. Moreover, the etching type may include both dry etching and wet etching. Then, the etched light absorbing block 283 is coated with a transparent material, and the transparent material covers not only the plurality of light absorbing blocks 283a but also the space 283b between the plurality of light absorbing blocks 283a, thereby forming the transparent supporting layer 284. . Then, a plurality of light absorbing blocks 283a are formed on the transparent supporting layer 284 in the manner in which the light absorbing layer 283 is formed, and the light absorbing layer 283 and the transparent supporting layer 284 which are alternately stacked in a plurality of layers are sequentially formed, thereby forming the anti-aliasing imaging element 28.

Further, in order to ensure the light transmissive effect of the first light-transmitting region 282, the transparent material forming the transparent supporting layer 284 may be selected from materials having a large light transmittance, such as glass, PMMA, PC (polycarbonate), and ring. Oxygen resin, etc.

In some embodiments, please refer to FIG. 7, which illustrates the structure of an anti-aliasing imaging element of another embodiment of the present invention. The anti-aliasing imaging element 28 includes a light absorbing layer 283 and a transparent support layer 284 which are alternately stacked, and the thickness of each of the transparent support layers 284 is unequal. That is, the values of the thicknesses h1, h2, and h3 in FIG. 7 are not equal. Optionally, the thickness of the transparent support layer 284 is increased layer by layer, that is, the thickness h1<h2<h3. In this way, the optical signal outside the vertical direction of the substrate by ±20° can be prevented from passing through the transparent supporting layer 284 between the light absorbing blocks 283a, thereby improving the sensing accuracy of the photosensitive module 2. It should be noted that the thickness parameter of each layer of the transparent supporting layer 284 and the width and height parameters of the light absorbing block 283a can be differently set and combined in various combinations to improve the sensing accuracy of the photosensitive module 2.

In some embodiments, the anti-aliasing imaging element 28 is formed directly on the photosensitive panel 200, that is, the carrier when the anti-aliasing imaging element 28 is formed is the photosensitive panel 200 provided with the photosensitive unit 22. However, the anti-aliasing imaging element 28 can be modified, for example, and then placed on the photosensitive panel 200 provided with the photosensitive unit 22, thereby accelerating the process of the photosensitive module 2.

In some embodiments, the plurality of first light transmissive regions 282 in the anti-aliasing imaging element 28 are evenly distributed such that the fabrication process of the anti-aliasing imaging element 28 is relatively simple.

In some embodiments, taking the target object as a living body such as a finger, when the finger touches or approaches the photosensitive module 2, if the ambient light is irradiated on the finger, the finger has many organizational structures, such as the epidermis, the bone, Meat, blood vessels, etc., so part of the light signal in the ambient light will penetrate the finger, and some of the light signal will be absorbed by the finger. The light signal penetrating the finger will reach the photosensitive unit 22, and at this time, the photosensitive unit 22 not only senses the light signal reflected by the target object, It also senses that the ambient light penetrates the light signal of the finger, so that accurate sensing cannot be performed. Therefore, in order to prevent the ambient light from affecting the sensing of the target object by the photosensitive unit 22, please refer to FIG. 8. FIG. 8 shows the structure of the photosensitive module according to another embodiment of the present invention. The photosensitive module 2 further includes a filter film 29 disposed between the anti-aliasing imaging element 28 and the photosensitive panel 200, wherein the filter film is used to preset a wavelength band Filtering is performed outside the optical signal. Alternatively, the anti-aliasing imaging element 28 is disposed between the filter film 29 and the photosensitive panel 200. For example, the filter film 29 is disposed on a side of the anti-aliasing imaging element 28 away from the photosensitive panel 200. .

In the embodiment of the present invention, the optical signal outside the predetermined wavelength band of the reflected optical signal is filtered by the filter film 29, thereby improving the sensing accuracy of the photosensitive module 2.

In some embodiments, the predetermined wavelength band is a wavelength band corresponding to the blue light signal, that is, the filter film 29 filters out optical signals other than the blue light signal.

In some embodiments, the predetermined band is a band corresponding to the green light signal, that is, the filter film 29 filters out the light signals other than the green light signal.

Among the red light signal, the blue light signal, and the green light signal of the ambient light, the target object F such as a finger absorbs the weakest red light signal, and the green light signal, and the blue light signal absorbs the strongest. That is, ambient light illuminates the finger, and a large amount of blue light signal is absorbed by the finger, and only a small amount or even no blue light signal penetrates the finger. Therefore, selecting the optical signal of the band other than the blue light signal or the green light signal for filtering can greatly eliminate the interference of the ambient light and improve the sensing accuracy of the photosensitive module 2.

In some embodiments, the substrate 26 can include both a transparent substrate such as, but not limited to, an insulating substrate such as a glass substrate, a plastic substrate, a crystal, a sapphire, etc., and a non-transparent substrate such as, but not limited to, a silicon substrate, Printed circuit boards, metal substrates, and the like. In addition, the substrate 26 may be a rigid material or a flexible material such as a flexible film. If the substrate 26 is a flexible material, the photosensitive module 2 can be thinned not only in thickness, but also in an electronic device having a curved display.

In some embodiments, please refer to FIG. 9. FIG. 9 shows the structure of a photosensitive device according to an embodiment of the present invention. The photosensitive device 20 includes a photosensitive panel 200. The plurality of photosensitive cells 22 are arranged in an array on the substrate 26. The substrate 26 is further formed with a scan line group and a data line group electrically connected to the photosensitive unit 22, for example. The scan driving signal is transmitted to the photosensitive unit 22 to activate the photosensitive unit 22 to perform light sensing, and the data line group is used to output an electrical signal generated by the photosensitive unit performing light sensing. The substrate 26 is, for example but not limited to, a silicon substrate, a metal substrate, a printed circuit board, etc., and may be, for example, an insulating substrate such as a glass substrate, a plastic substrate, crystal, or sapphire.

Specifically, the photosensitive cells 22 are distributed in an array, such as a matrix distribution. Of course, it can also be distributed in other rule manners or in an irregular manner. The scan line group includes a plurality of scan lines 201. The data line group includes a plurality of data lines 202. The plurality of scan lines 201 and the plurality of data lines 202 are disposed to cross each other and disposed between adjacent photosensitive units 22. For example, a plurality of scanning lines G1, G2, ..., Gm are arranged at intervals in the Y direction, and a plurality of data lines S1, S2, ..., Sn are arranged at intervals in the X direction. However, the plurality of scanning lines 201 and the plurality of data lines 202 are not limited to the vertical arrangement shown in FIG. 9, and may be disposed at an angle, for example, 30°, 60°, or the like. In addition, due to the conductivity of the scan lines 201 and the data lines 202, the scan lines 201 and the data lines 202 at the intersections are separated by an insulating material.

It should be noted that the distribution and the number of the scan lines 201 and the data lines 202 are not limited to the above-exemplified embodiments, and the corresponding scan line groups and data lines may be correspondingly arranged according to the structure of the photosensitive unit 22. group.

Further, a plurality of scan lines 201 are connected to a photosensitive driving circuit 23, and a plurality of data lines 202 are connected to a signal processing circuit 25. The photosensitive driving circuit 23 is for supplying a corresponding scanning driving signal and transmitting it to the corresponding photosensitive unit 22 through the corresponding scanning line 201 to activate the photosensitive unit 22 to perform light sensing. The photosensitive driving circuit 23 is formed on the substrate 26, and of course, it can also be electrically connected to the photosensitive unit 22 through a connecting member (for example, a flexible circuit board), that is, a plurality of scanning lines 201 are connected. The signal processing circuit 25 receives an electrical signal generated by the corresponding photosensitive unit 22 performing light sensing through the data line 202, and acquires biometric information of the target object based on the electrical signal.

In some embodiments, the photosensitive device 20 including the photosensitive panel 200 includes, in addition to the signal processing circuit 25 and the photosensitive driving circuit 23 described above, a controller 27 for controlling the output of the driving circuit. The scan driving signal, such as, but not limited to, progressively activating the photosensitive unit 22 performs light sensing. The controller 27 is further configured to control the signal processing circuit 25 to receive the electrical signal output by the photosensitive unit 22, and after receiving the electrical signals output by all the photosensitive units 22 that perform light sensing, generate biometric information of the target object based on the electrical signals. .

Further, the signal processing circuit 25 and the controller 27 described above may be selectively formed on the substrate 26 depending on the type of the substrate 26, or may be electrically connected to the photosensitive unit 22, for example, by a connector (for example, a flexible circuit board). For example, when the substrate 26 is a silicon substrate, the signal processing circuit 25 and the controller 27 may alternatively be formed on the substrate 26, and may alternatively be electrically connected to the photosensitive unit 22, for example, via a flexible circuit board; When 26 is an insulating substrate, the signal processing circuit 25 and the controller 27 need to be electrically connected to the photosensitive unit 22, for example, via a flexible circuit board.

In some embodiments, please refer to FIG. 10, which illustrates a connection structure of the photosensitive unit 22 of the embodiment with the scan line 201 and the data line 202. The photosensitive unit 22 includes at least one photosensitive device 220 and a switching device 222. The switching device 222 has a control terminal C and two signal terminals, for example, a first signal terminal Sn1 and a second signal terminal Sn2. The control terminal C of the switching device 222 is connected to the scan line 201. The first signal terminal Sn1 of the switching device 222 is connected to a reference signal L via the photosensitive device 220, and the second signal terminal Sn2 of the switching device 222 is connected to the data line 202. It should be noted that the photosensitive unit 22 illustrated in FIG. 10 is for illustrative purposes only and is not limited to the photosensitive unit 22 . The other composition of the structure.

Specifically, the above-mentioned photosensitive device 220 is, for example but not limited to, any one or several of a photodiode, a phototransistor, a photodiode, a photo resistor, and a thin film transistor. Taking a photodiode as an example, a negative voltage is applied across the photodiode. At this time, if the photodiode receives the optical signal, a photocurrent is generated in a proportional relationship with the optical signal, and the received optical signal is more intense. Larger, the larger the photocurrent generated, the faster the voltage drop on the negative pole of the photodiode. Therefore, by collecting the voltage signal on the negative pole of the photodiode, the intensity of the optical signal reflected from different parts of the target object is obtained, and the target is obtained. Biometric information of the object. It can be understood that a plurality of photosensitive devices 220 are provided to increase the photosensitive effect of the photosensitive device 220.

Further, the switching device 222 is, for example but not limited to, any one or several of a triode, a MOS transistor, and a thin film transistor. Of course, the switching device 222 can also include other types of devices, and the number can also be two, three, and the like.

In some embodiments, in order to further improve the sensing accuracy of the photosensitive module 2, the photosensitive device 220 having high sensitivity to blue or green light signals may also be selected. The light sensing is performed by selecting the photosensitive device 220 having high sensitivity to the blue light signal or the green light signal, so that the photosensitive device 220 is more sensitive to the light of the blue light signal or the green light signal, so the ambient light is also avoided to some extent. The interference caused by the red light signal improves the sensing accuracy of the photosensitive module 2.

Taking the structure of the photosensitive unit 22 shown in FIG. 10 as an example, the gate of the thin film transistor TFT serves as the control terminal C of the switching device 222, and the source and the drain of the thin film transistor TFT correspond to the first signal terminal Sn1 of the switching device 222 and The second signal terminal Sn2. The gate of the thin film transistor TFT is connected to the scanning line 201, the source of the thin film transistor TFT is connected to the negative electrode of the photodiode D1, and the drain of the thin film transistor TFT is connected to the data line 202. The anode of the photodiode D1 is connected to a reference signal L, which is, for example, a ground signal or a negative voltage signal.

When the photosensitive unit 22 performs photo sensing, a driving signal is applied to the gate of the thin film transistor TFT through the scanning line 201 to drive the thin film transistor TFT to be turned on. At this time, the data line 202 is connected to a positive voltage signal. When the thin film transistor TFT is turned on, the positive voltage signal on the data line 202 is applied to the negative electrode of the photodiode D1 via the thin film transistor TFT. Since the positive electrode of the photodiode D1 is grounded, the photoelectric A reverse voltage is applied across diode D1 such that photodiode D1 is reverse biased, i.e., in operation. At this time, when an optical signal is irradiated to the photodiode D1, the reverse current of the photodiode D1 rapidly increases, thereby causing a change in current on the photodiode D1, which can be obtained from the data line 202. Since the intensity of the optical signal is larger, the reverse current generated is larger. Therefore, according to the current signal acquired on the data line 202, the intensity of the optical signal can be obtained, thereby obtaining the biometric information of the target object.

In some embodiments, the reference signal L may be a positive voltage signal, a negative voltage signal, a ground signal, or the like. As long as the electrical signal provided on the data line 202 and the reference signal L are applied across the photodiode D1 such that a reverse voltage is formed across the photodiode D1 to perform photo sensing, it is within the scope of protection defined by the present invention.

It can be understood that the connection manner of the thin film transistor TFT and the photodiode D1 in the photosensitive unit 22 is not limited to the connection mode shown in FIG. 10, and may be other connection methods. For example, as shown in FIG. 11, a connection structure of the photosensitive unit 22 and the scanning line 201 and the data line 202 of another embodiment of the present invention is shown. The gate G of the thin film transistor TFT is connected to the scanning line 201, the drain D of the thin film transistor TFT is connected to the anode of the photodiode D1, and the source S of the thin film transistor TFT is connected to the data line 202. The negative terminal of the photodiode D1 is connected to a positive voltage signal.

Please refer to FIG. 12. FIG. 12 shows a partial structure of the display module 1 according to an embodiment of the present invention. The display module 1 includes a display device (not shown) and a photosensitive module 2. The display device further includes a display panel 100 for performing image display, and a second light transmissive area (not shown) is disposed in the display area of the display panel 100. The photosensitive module 2 is the photosensitive module 2 of any of the above embodiments, and the photosensitive module 2 is disposed under the display panel 100 for sensing an optical signal emitted from the second transparent region to obtain contact or proximity. The predetermined biometric information of the target object of the display module 1.

Since the photosensitive module 2 is located below the display panel 100, the display panel 100 has a second transparent region through which the optical signal reflected by the target object passes, so that the photosensitive panel 200 in the photosensitive module 2 can receive the through-display. The optical signal of the panel 100 converts the received optical signal into an electrical signal, and acquires predetermined biometric information of the target object contacting or approaching the display module 1 according to the converted electrical signal.

In some embodiments, in order to ensure that the optical signal passing through the display panel 100 is received by the photosensitive module 2, the photosensitive device 220 (refer to FIG. 10) in the photosensitive module 2 is disposed under the second transparent region. Further, the photosensitive device 220 is disposed opposite to the second light-transmitting region, thereby ensuring that the optical signals passing through the display panel 100 are all received, thereby improving the sensing accuracy of the photosensitive module 2.

In some embodiments, with continued reference to FIG. 12, the anti-aliasing imaging element 28 in the photosensitive module 2 is laminated with the photosensitive panel 200 and the display panel 100, that is, the anti-aliasing imaging element 28 is located on the photosensitive panel 200 and the display panel. Between 100.

In some embodiments, when the display module 1 is in operation, the display panel 100 emits an optical signal to achieve a corresponding display effect. At this time, if the target object touches or touches the display module 1, the optical signal emitted by the display panel 100 reaches the target object and then reflects, and the reflected optical signal is received by the photosensitive panel 200, and the photosensitive panel 200 receives the received optical signal. Converted to an electrical signal corresponding to the optical signal. The signal processing circuit 26 (please refer to FIG. 9) in the photosensitive module 2 obtains predetermined biometric information of the target object based on the electrical signal generated by the photosensitive panel 200.

In some embodiments, the display panel 100 is, for example but not limited to, an OLED display device as long as the display can be implemented. A display device having an effect and having a light-transmitting region through which a light signal passes is within the scope of protection of the present invention.

Please refer to FIG. 13. FIG. 13 shows a partial structure of the OLED panel of the embodiment. Taking the display panel 100 as an OLED display panel as an example, the display panel 100 further includes a transparent substrate 101. The display pixel 12 includes an anode 102 formed on the transparent substrate 101, a light-emitting layer 103 formed on the anode 102, and a cathode 104 formed on the light-emitting layer 103. When a voltage signal is applied to the anode 102 and the cathode 104, a large amount of carriers accumulated on the anode 102 and the cathode 104 will move toward the light-emitting layer 103 and enter the light-emitting layer 103, thereby exciting the light-emitting layer 103 to emit a corresponding light signal.

In certain embodiments, the anode 102 and cathode 104 are made of a conductive material. For example, the anode 102 is made of a suitable conductive material such as indium tin oxide (ITO), which is made of a suitable conductive material such as metal or ITO. The display panel 100 is not limited to an OLED display panel, and may be other suitable types of display panels. In addition, the display panel 100 may be a rigid screen of a rigid material or a flexible screen of a flexible material. Moreover, the OLED display panel of the embodiments of the present invention may be a bottom emission type device, a top emission type device, or other display device of a suitable structure type.

Further, please refer to FIG. 14 , which illustrates a structure of a display module according to an embodiment of the present invention. The display pixel 12 includes three display pixels: a red pixel R, a green pixel G, and a blue pixel B. The light signal emitted by the red pixel R is a red light signal, and the light signal emitted by the green pixel G is a green light signal, and the blue pixel B The emitted light signal is a blue light signal. The illuminating layer in the red pixel R is a luminescent material that emits a red light signal, the illuminating layer in the green pixel G is a luminescent material that emits a green light signal, and the luminescent layer in the blue pixel B is a luminescent material that emits a blue light signal. Of course, of course, the display pixel 12 may further include black pixels, white pixels; or red pixels, green pixels, blue pixels, white pixels, and the like. In addition, the display panel 100 can also realize display by using other display technologies, such as color conversion technology, and the light emitted by the blue OLED is absorbed by the fluorescent dye and then transferred to the red, green, and blue light signals. It should be noted that the display pixels 12 in the display panel 100 are not limited to the arrangement shown in FIG. 14 , and may have other arrangements, such as a pentiel arrangement.

Referring to FIG. 14 , a space H is provided between adjacent display pixels, and the second light-transmissive area is disposed in the interval H. The photosensitive device 220 in the photosensitive unit 22 is disposed below the interval H between adjacent display pixels. The lower part here is, for example but not limited to, directly below, and it is possible to ensure that sufficient light signals are received at the position. It can be understood that the more the optical signal passes through the interval H, the higher the sensing accuracy of the photosensitive module 2.

Referring to FIG. 15, FIG. 15 shows a relative positional relationship between a photosensitive device and a display pixel in a photosensitive unit according to an embodiment. The display pixel 12 is a transparent display pixel structure, and the display pixel 12 is, for example but not limited to, a red pixel R and a green pixel. G and blue pixel B three display pixels. The photosensitive device 220 of the photosensitive unit 22 is correspondingly disposed on the display Below the pixel 12.

The embodiment of the present invention utilizes the light transmissivity of the display pixel 12 to receive an optical signal reflected by the target object and passing through the display pixel to perform biometric information sensing on the target object. In addition, since the photosensitive device 220 is disposed under the display pixel 12, the photosensitive surface of the photosensitive device 220 can be equal to the area of the display pixel 12, which can be realized by using the existing display panel structure, and the preparation of the display module 1 is reduced. Cost, and ensuring that enough light signals in the optical signal passing through the display pixel 12 are received by the photosensitive device 220, improves the sensing accuracy of the photosensitive module 2.

Further, the display panel 100 further includes a driving circuit (not shown) that drives the display pixels 12 to emit light, and the display device further includes a display driving circuit (not shown), and the corresponding driving lines can be disposed in each The display pixels 12 may be disposed below each of the display pixels 12. The display driving circuit may be disposed on the display panel 100 or may be connected to the display pixel 12 through a flexible circuit board. The display driving circuit is configured to drive a plurality of display pixels 12 to emit light for use as a light source when the photosensitive module 2 performs light sensing.

In some embodiments, the photosensitive device 220 is located below any one or more of the three display pixels of red, blue, and green. By being located below the display pixel 12, more optical signals can be received by the photosensitive device 220. . For example, as shown in FIG. 15, the photosensitive device 220 is located below the blue display pixel B. In addition, a filter film 29 may be provided on the photosensitive device 220 in order to prevent interference of other optical signals. The filter film 29 is for filtering optical signals other than the predetermined wavelength band. For example, if the optical signals other than the blue light signal are interference signals, a blue filter film is provided to filter the optical signals other than the wavelength band of the blue light signal. It should be noted that, since the photosensitive panel 200 is disposed under the display panel 100, the filter film 29 can be independently disposed and then attached to the photosensitive panel 200, thereby making the preparation process of the filter film 29 simpler.

In some embodiments, please refer to FIG. 16 , which shows a partial structure of a display module according to another embodiment of the present invention. In this embodiment, the light-emitting layer 103 of the display pixel 12 emits white light, and the light-emitting side of the display pixel 12 is provided with a CF film 13 for filtering white light emitted from the display pixel 12 to form red and green. And blue three kinds of light signals. Specifically, the CF film 13 includes three types of photoresists, that is, three kinds of display pixels are set to be red, green, and blue. When the white light emitted by the light-emitting layer 103 passes through the CF film 13, the corresponding red light is emitted. Signal, green light signal, blue light signal. In other words, when the optical signal reflected by the target object passes through the display panel 100, the red light signal is filtered out when passing through the blue photoresist or the green photoresist of the CF film 13. Therefore, the photosensitive device 220 in the photosensitive unit 22 is disposed directly under the display pixel corresponding to the blue photoresist and/or the display pixel 12 corresponding to the green photoresist, thereby eliminating the influence of the interference signal, thereby improving the sense of the photosensitive module 2. Measurement accuracy.

In some embodiments, please refer to FIG. 17, which shows a display mode according to still another embodiment of the present invention. a partial structure of the group. In this embodiment, in order to enhance the intensity of the optical signal emitted by the display pixel, the display pixel is provided with a corresponding micro-resonator structure 14 which generates a micro-resonance effect on the optical signal of a specific wavelength. Thereby, the optical signal of the specific wavelength is enhanced in the emission direction, and the optical signal outside the specific wavelength can pass through the micro-resonant structure 14. For example, the micro-resonator structure corresponding to the red display pixel R can enhance the emitted red light signal, and the remaining light signals pass through the micro-resonator structure 14. In other words, when the light signal reflected by the target object passes through the red display pixel R, if there is a red light signal in the light signal, the red light signal is reflected back, and the remaining light signals pass through the red display pixel. R is received by the photosensitive device 220, so that the photosensitive device 220 in the photosensitive unit 22 is disposed directly below the red display pixel R, which can effectively filter the red light signal of the ambient light that penetrates the target object, thereby improving the photosensitive module 2 Sensing accuracy.

In some embodiments, the photosensitive device 200 is further disposed under the green display pixel G or the blue display pixel B. Correspondingly, the photosensitive device 220 is provided with a filter film 29 for filtering optical signals other than the preset wavelength band, and the setting of the preset wavelength band is different depending on the placement position of the photosensitive device 220. . Specifically, if the photosensitive device 220 is disposed under the green display pixel G, the red and blue light signals in the optical signal reflected by the target object will pass through the green display pixel, and thus the filter film is provided for using the blue light signal. The light signal is filtered such that the photosensitive device 220 receives only the blue light signal. Similarly, if the photosensitive device 220 is disposed under the red display pixel R and the blue display pixel B, the filter film 29 is used to filter out the optical signal other than the green light signal, so that the photosensitive device 220 receives only the green light signal.

In some embodiments, the photosensitive panel 200 is configured to perform biometric information sensing of a target object at an arbitrary position within a display area of the display panel 100. Specifically, for example, referring to FIG. 12 and FIG. 18 together, the display panel 100 has a display area 105 defined by the light-emitting areas of all the display pixels 12 of the display panel 100, and a display area 105 other than the display area 105. The area is a non-display area 106 for setting a circuit such as a display driving circuit for driving the display pixels 12 or a line bonding area for connecting the flexible circuit boards. The photosensitive panel 200 has a sensing area 203 and a non-sensing area 204 defined by the sensing areas of all the photosensitive cells 22 of the photosensitive panel 200, and the area other than the sensing area 203 is the non-sensing area 204. The non-sensing area 204 is for setting a circuit such as the photosensitive driving circuit 23 that drives the photosensitive unit 22 to perform light sensing or a line bonding area for connecting the flexible circuit board. The shape of the sensing region 203 is consistent with the shape of the display region 105, and the size of the sensing region 203 is greater than or equal to the size of the display region 105, such that the photosensitive panel 200 can be in any position that contacts or approaches the display region 105 of the display panel 100. Sensing of predetermined biometric information of the target object. Further, the area of the photosensitive panel 200 is less than or equal to the area of the display panel 100, and the shape of the photosensitive panel 100 is consistent with the shape of the display panel 100, so that the assembly of the photosensitive panel 200 and the display panel 100 is facilitated. However, in some embodiments, the area of the photosensitive panel 200 may also be larger than the area of the display panel 100.

In some embodiments, the sensing area 203 of the photosensitive panel 200 may also be smaller than the display area 105 of the display panel 100 to achieve predetermined biometric information of a target object of a local area of the display area 105 of the display panel 100. Sensing.

Further, the display device is further configured to perform touch sensing, and the display driving circuit drives the display pixels of the corresponding touch regions to emit light after the display device detects the touch or proximity of the target object.

Further, referring to FIG. 19 and FIG. 20, FIG. 19 shows a structure of an electronic device according to an embodiment of the present invention, and FIG. 20 shows a cross-sectional structure of the electronic device shown in FIG. 19 along line II, and FIG. 20 only A partial structure of the electronic device is shown. The electronic device is provided with the display module of any one of the above embodiments, which is used for image display of an electronic device and for sensing biometric information of a target object contacting or approaching the electronic device.

Electronic devices such as, but not limited to, suitable types of electronic products such as consumer electronics, home electronics, vehicle-mounted electronic products, and financial terminal products. Among them, consumer electronic products such as mobile phones, tablets, notebook computers, desktop monitors, computer integrated machines. Home-based electronic products such as smart door locks, TVs, refrigerators, wearable devices, etc. Vehicle-mounted electronic products such as car navigation systems, car DVDs, etc. Financial terminal products such as ATM machines, terminals for self-service business, etc. The electronic device shown in FIG. 19 is exemplified by a mobile terminal type mobile terminal. However, the above display module is also applicable to other suitable electronic products, and is not limited to a mobile phone type mobile terminal.

Specifically, a front surface of the mobile terminal 3 is provided with a display panel 100, and a protective cover 300 is disposed above the display panel 100. Optionally, the screen of the display panel 100 is relatively high, for example, 80% or more. The screen ratio refers to the ratio of the display area 105 of the display panel 100 to the front area of the mobile terminal 3. The photosensitive panel 200 is disposed below the display panel 100 for sensing predetermined biometric information of a target object contacting or approaching an arbitrary position of the display area 105 of the display panel 100.

When the mobile terminal 3 is in a bright screen state and is in the biometric information sensing mode, the display panel 100 emits an optical signal. When an object contacts or approaches the display area, the photosensitive panel 200 receives the optical signal reflected by the object, converts the received optical signal into a corresponding electrical signal, and acquires predetermined biometric information of the object according to the electrical signal. For example, fingerprint image information. Thereby, the photosensitive panel 200 can realize sensing of a target object at any position contacting or approaching the display area 105.

The electronic device of the embodiment of the present invention has the following advantages:

First, the photosensitive panel in the photosensitive module realizes the biometric information sensing of the target object by using the optical signal emitted by the display panel, and does not need to additionally set the light source, thereby saving the cost of the electronic device and achieving the contact or touch. Biometric information of the target object at any position in the display area of the display panel. In addition, the photosensitive module of the display module can be independently fabricated and assembled with the display device, thereby accelerating the preparation of the electronic device.

Secondly, in the embodiment of the present invention, the photosensitive panel is located below the display panel, and the light signal emitted by the display panel is displayed. After reaching the target object, the reflected light is reflected by the target object, and the reflected light signal passes through the display panel and is sensed by the photosensitive unit to form biometric information of the target object. In this way, the problem of affecting the display of the electronic device is not considered, and the setting of the photosensitive unit on the photosensitive panel is not limited, so that the photosensitive device in the photosensitive unit can be made large enough, thereby improving the sensing effect of the photosensitive module.

Further, the electronic device further includes a touch sensor (not shown) for determining a touch area of the target object for electronic when a target object contacts the protective cover The device performs biometric information sensing within the touch area.

In some embodiments, the touch sensor is either integrated with the protective cover 300 or integrated with the photosensitive panel 200 or integrated with the display panel 100. The integrated touch sensor not only realizes the touch detection of the target object, but also reduces the thickness of the electronic device, which is beneficial to the development of the electronic device in the direction of thinning and thinning.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. The specific features, structures, materials or characteristics described in the embodiments or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

While the embodiments of the present invention have been shown and described above, it is understood that the foregoing embodiments are illustrative and are not to be construed as limiting the scope of the invention Variations, modifications, substitutions and variations of the embodiments described above are possible.

Claims (28)

1. A display module comprising:

   The display device includes a display panel for performing image display, and a second light transmissive area is disposed in the display area of the display panel;

   The photosensitive module is disposed under the display panel and includes a photosensitive panel for sensing an optical signal emitted from the second transparent area to acquire a predetermined biological object that contacts or approaches the target object of the display module Feature information; the photosensitive panel includes a plurality of photosensitive devices, and the photosensitive device is located below the second light transmissive region.
2. The display module of claim 1 wherein said photosensitive device is disposed opposite or corresponding to said second light transmissive region.
3. The display module as claimed in claim 1 , wherein the display panel comprises a plurality of display pixels, and the second light-transmissive region is disposed between adjacent display pixels.
4. The display module as claimed in claim 1 , wherein the display panel comprises a plurality of transparent display pixels, and the plurality of transparent display pixels form the second light transmissive area.
5. The display module as claimed in claim 4, wherein the light-emitting side of the display panel is provided with a CF film, and the CF film comprises three kinds of photoresists of red, green and blue for displaying the display pixels. The emitted optical signal is filtered to form three kinds of optical signals of red, green and blue; the photosensitive device is located below the display pixel corresponding to the blue photoresist and/or the display pixel corresponding to the green photoresist.
6. The display module as claimed in claim 3, wherein the display pixels comprise three display pixels of red, green and blue.
7. The display module as claimed in claim 6 , wherein the display panel further comprises a micro-resonator structure corresponding to the display pixel; and the photosensitive device is located below the red display pixel.
8. The display module according to claim 7, wherein the photosensitive device is further located under the blue display pixel or the green display pixel, and the photosensitive device is provided with a filter film, the filter film For filtering an optical signal other than the preset wavelength band, and the setting of the preset wavelength band differs depending on a placement position of the photosensitive device.
9. The display module according to claim 6, wherein the photosensitive device is located in any one or more of red, green and blue display pixels; the photosensitive device is provided with a filter film, the filter The light film is used to filter optical signals outside the preset band.
10. The display module of claim 1 , wherein the photosensitive module further comprises a filter film, wherein the filter film is disposed on the photosensitive panel for performing optical signals other than the preset wavelength band. filter.
11. The display module of claim 1 wherein said photosensitive panel further comprises a substrate, said A photosensitive device is disposed on the substrate.
12. The display module according to claim 11, wherein the substrate is a silicon substrate, a metal substrate, a printed circuit board or an insulating substrate.
13. The display module according to claim 1, wherein the display panel has a display area; and the photosensitive panel is configured to perform biometric information sensing on a target object at an arbitrary position in a display area of the display panel; or The photosensitive panel has a sensing area, and a shape of the sensing area is consistent with a shape of the display area, and a size of the sensing area is greater than or equal to a size of the display area.
14. The display module according to any one of claims 1 to 13, wherein the photosensitive module further comprises an anti-aliasing imaging element, the anti-aliasing imaging element being located on the display panel and the photosensitive panel Between, it is used to prevent aliasing of optical signals received by adjacent photosensitive devices.
15. The display module as claimed in claim 14 , wherein the anti-aliasing imaging element comprises a light absorbing wall and a plurality of first light-transmissive regions surrounded by the light-absorbing walls, wherein the photosensitive device corresponds to at least one of the first A light transmissive area.
16. The display module of claim 15 wherein said first light transmissive regions are evenly distributed.
17. The display module according to claim 15, wherein the light absorbing wall comprises a plurality of light absorbing blocks and height blocks arranged in an alternating manner.
18. The display module of claim 17 wherein said spacer block is a layer of transparent material.
19. The display module according to claim 15, wherein the first light-transmissive region is filled with a transparent material.
20. The display module as claimed in claim 14 , wherein the anti-aliasing imaging element comprises a plurality of layers of light absorbing layers and transparent support layers arranged alternately; the light absorbing layer comprises a plurality of spaced light absorbing blocks; The transparent supporting layer is formed by filling with a transparent material, and filling the interval between the light absorbing blocks together; wherein the interval corresponding to the area forms a first light transmitting area, and each of the photosensitive devices corresponds to at least one of the first Light transmission area.
21. The display module of claim 20, wherein the thickness of each of the transparent support layers is unequal.
22. The display module according to claim 21, wherein the thickness of the transparent supporting layer is increased layer by layer.
23. The display module according to claim 14, wherein the anti-aliasing imaging element is directly formed on the photosensitive panel; or the anti-aliasing imaging element is separately formed and then disposed on the photosensitive On the panel.
24. The display module as claimed in claim 1, wherein the display panel comprises a plurality of display pixels, and the display device further comprises a display driving circuit for driving the plurality of display pixels to emit light for use as The light source when the photosensitive module performs light sensing.
25. An electronic device comprising the display module according to any one of claims 1-24.
26. The electronic device according to claim 25, wherein said electronic device further comprises a protective cover for being touched by a target object when said electronic device performs biometric information sensing.
27. The electronic device according to claim 26, wherein said electronic device further comprises a touch sensor for determining a touch area of said target object when a target object contacts said protective cover And for the electronic device to perform biometric information sensing in the touch area.
28. The electronic device according to claim 27, wherein the touch sensor is integrated with the protective cover or integrated with a photosensitive panel in the display module or with a display in the display module Panel integration.

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