WO2019041214A1 - 显示模组 - Google Patents
显示模组 Download PDFInfo
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- WO2019041214A1 WO2019041214A1 PCT/CN2017/099862 CN2017099862W WO2019041214A1 WO 2019041214 A1 WO2019041214 A1 WO 2019041214A1 CN 2017099862 W CN2017099862 W CN 2017099862W WO 2019041214 A1 WO2019041214 A1 WO 2019041214A1
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- WIPO (PCT)
- Prior art keywords
- light
- liquid crystal
- display module
- point
- display panel
- Prior art date
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Images
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
Definitions
- the present invention relates to the field of optical fingerprint recognition, and in particular, to a display module.
- the fingerprint imaging recognition technology is a technique of acquiring a fingerprint image of a human body through a fingerprint sensor and then comparing it with existing fingerprint imaging information in the system to determine whether it is correct or not, thereby realizing the identity recognition technology. Due to its ease of use and the uniqueness of human fingerprints, fingerprint recognition technology has been widely used in various fields. For example, the public security bureau, customs and other security inspection areas, building access control systems, and consumer goods such as personal computers and mobile phones.
- Fingerprint imaging recognition technology can be realized by various techniques such as optical imaging, capacitive imaging, and ultrasonic imaging. Relatively speaking, optical fingerprint imaging technology has relatively good imaging effect and relatively low equipment cost.
- liquid crystal display panels are widely used in various fields due to their small size, light weight, low radiation and the like.
- the display module structure of the existing integrated fingerprint recognition function needs to be improved, and the performance needs to be improved.
- the problem solved by the present invention is to provide a display module, which can better realize the integration of fingerprint recognition and image display functions under the premise of ensuring the manufacturing yield.
- a display module including:
- the liquid crystal display panel includes a plurality of display pixel units, and the display pixel unit includes a transmissive area and a non-transmissive area, and at least partially displays a photoreceptor in the non-transmissive area of the pixel unit a point-like patterning light source located on one side of the liquid crystal display panel; a protective layer located above the liquid crystal display panel and the point-like drawing light source; the protective layer facing away from the liquid crystal display panel and
- the surface of the point-like drawing light source is a sensing surface, and the light generated by the point-like drawing light source is obliquely projected into the protective layer, and is transmitted to the sensing surface through the protective layer to form a carrying Reflected light having fingerprint information; the photosensitive device collecting the reflected light to obtain a fingerprint image.
- the photosensitive device has a lighting surface for collecting the reflected light; a distance between the lighting surface and the sensing surface is greater than 0.4 mm.
- the liquid crystal display panel includes an array substrate and a color filter substrate disposed opposite to each other, and a liquid crystal layer filled between the array substrate and the color filter substrate; the array substrate is located in the color filter Between the light substrate and the sensing surface; or the color filter substrate is located between the array substrate and the sensing surface.
- the color filter substrate comprises a plurality of color filter units and a black matrix filled between the color filter units; the transmission region corresponds to the color filter unit; The transmission zone corresponds to the black matrix.
- the color filter substrate is located between the array substrate and the sensing surface; and the photosensitive device is configured to collect reflected light transmitted through the black matrix.
- the liquid crystal display panel further includes: a first polarizing plate and a second polarizing plate disposed opposite to each other, wherein the array substrate and the color filter substrate are located in the first polarizing plate and the second polarizing plate
- the photosensitive device is configured to collect reflected light transmitted through the first polarizer or the second polarizer.
- the liquid crystal display panel further includes: a sealant layer, the sealant layer is located between the array substrate and the color filter substrate and surrounds the liquid crystal layer; The sealant layer is away from one side of the liquid crystal layer.
- the light generated by the point-like source of light has a wavelength ranging from 700 nm to 1500 nm.
- the method further includes: a thickening layer located on the liquid crystal display panel and the protective layer between.
- the method further includes: a light guiding member having an incident surface and a first exit surface, the incident surface facing a light exiting surface of the point pattern light source, the first exit surface facing the protective layer;
- the light generated by the point-like light source is emitted from the light-emitting surface, and enters the light guide through the incident surface, and at least a portion of the light entering the light guide is emitted from the first exit surface and projected to Within the protective layer.
- the light guide further includes a second exit surface, the second exit surface faces the thickening layer; and a portion of the light entering the light guide is emitted from the second exit surface and projected to the The thickening layer is described and conducted through the thickened layer into the protective layer.
- the incident surface is a curved surface that protrudes toward the point-like drawing source.
- the material of the light guiding member is a light transmissive glue; the incident surface is in contact with the light emitting surface of the point pattern light source, and at least the first exit surface of the light guiding member faces the protective layer Portions of the surface of the point-like source are in contact.
- the method further includes: a light shielding layer on a surface of the protective layer facing the point-like drawing light source, wherein the light shielding layer exposes at least a portion of the protective layer corresponding to the thickening layer.
- the light shielding layer is disposed at least at a position corresponding to the point source.
- the thickening layer has a first surface facing the protective layer and a second surface facing the liquid crystal display panel, and a side connecting the first surface and the second surface; Light from the source of light enters the thickened layer through the side, exits from the first side and is projected into the protective layer.
- the side surface is perpendicular to the first surface or the second surface; or the angle between the side surface and the first surface is an acute angle and is sandwiched between the second surface and the second surface The angle is an obtuse angle.
- the thickening layer has a thickness of 0.2 mm to 0.5 mm. Inside.
- the method further includes: a collecting lens located in front of the light of the point-like drawing source for collecting the light generated by the point-like drawing source.
- the point source light source is an LED light.
- the dot pattern source includes two or more LED lamps; the display module further includes: a lighting control unit, configured to control the point when the photosensitive device collects light each time An LED light in the light source generates light.
- a lighting control unit configured to control the point when the photosensitive device collects light each time An LED light in the light source generates light.
- the liquid crystal display panel is a liquid crystal display panel based on an amorphous silicon thin film transistor, a liquid crystal display panel based on a low temperature polysilicon thin film transistor, or a liquid crystal display panel based on an indium gallium zinc oxide thin film transistor.
- a photosensitive device is integrated in the non-transmissive region of the liquid crystal display panel, and the photosensitive device is configured to collect reflected light carrying fingerprint information to obtain a fingerprint image; and the reflected light is generated by a point-like drawing light source.
- Light is formed on the sensing surface by being conducted through the protective layer; since the light generated by the point-like source is consistent, the stray light is less; and the point-like source is located at the One side of the liquid crystal display panel, so that the light generated by the point-like light source is directly projected into the protective layer without transmissing the liquid crystal display panel, and the light does not receive the light before being projected onto the sensing surface
- the influence of various structures in the liquid crystal display panel is less likely to be scattered, so that the uniformity of the light projected onto the sensing surface can be effectively maintained, and the composition of the stray light in the reflected light is effectively reduced;
- the maintenance of the stray light component can effectively improve the signal-to-noise ratio of the signal collected by the photosensitive device, and
- the liquid crystal display panel includes an array substrate and a color filter substrate disposed opposite to each other, and a liquid crystal layer filled between the array substrate and the color filter substrate; Between the color filter substrate and the sensing surface; or, the color filter substrate is located between the array substrate and the sensing surface, so that the selection can be selected according to the specific requirements of the display module.
- the base layer of the image display function is beneficial to maintain high manufacturing yield and low production cost.
- the color filter substrate includes a plurality of color filter units and a black matrix filled between the color filter units; a non-transmissive area of the display pixel unit and the black matrix Corresponding to the position, so that the photosensitive device is located at a position corresponding to the black matrix, that is, the orthographic projection of the photosensitive device on the color filter substrate is located at the position of the black matrix;
- the presence of the liquid crystal display panel does not affect the display effect of the liquid crystal display panel. Therefore, the photosensitive device is disposed at a position corresponding to the black matrix, which can effectively reduce the influence of the photosensitive device on the display effect of the liquid crystal display panel. Conducive to the integration of fingerprint recognition and image display functions.
- the point source is an infrared source
- the generated light has a wavelength range greater than 700 nm, so that the light generated by the point source is propagated in the protection layer and formed.
- the process of collecting the reflected light by the photosensitive device does not affect the display effect of the liquid crystal display panel, and can effectively ensure the display effect of the liquid crystal display panel; in particular, when the color filter substrate is located in the Between the array substrate and the sensing surface, the black matrix has a high transmittance to infrared light, and the photosensitive device is configured to collect reflected light transmitted through the black matrix, thereby using the spot-like light source
- the method of setting the infrared light source can also effectively reduce the influence of the black matrix on the fingerprint image acquisition, and is advantageous for obtaining a clear fingerprint image.
- the signal-to-noise ratio of the signal collected by the photosensitive device can be effectively improved, and The distance between the photosensitive device and the sensing surface can be ensured, not only the thickness of the protective layer can be ensured, but also the manufacturing yield can be improved; and the thickening layer, the light guiding member and the The arrangement of the condensing lens is made possible, the quality of the obtained fingerprint image can be effectively improved, the display effect of the liquid crystal display panel can be improved, and the function of fingerprint recognition and image display can be better compromised.
- FIG. 1 is a cross-sectional structural view showing a first embodiment of a display module of the present invention
- FIG. 2 is a cross-sectional structural view showing a second embodiment of the display module of the present invention.
- FIG. 3 is a cross-sectional structural view showing a third embodiment of the display module of the present invention.
- FIG. 4 is a cross-sectional structural view showing a fourth embodiment of the display module of the present invention.
- Figure 5 is a cross-sectional structural view showing a fifth embodiment of the display module of the present invention.
- FIG. 6 is a cross-sectional structural view showing a sixth embodiment of the display module of the present invention.
- FIG. 7 is a top plan view showing the sensing surface of the seventh embodiment of the display module of the present invention.
- the prior art mostly uses capacitive fingerprint imaging technology to integrate with a display module of a self-luminous display panel.
- the present invention provides a display module, which is integrated into the
- the use of the photosensitive device in the liquid crystal display panel and the point-like drawing light source can obtain a clear fingerprint image under the premise of ensuring the display effect, thereby better integrating the fingerprint recognition and the image display function.
- FIG. 1 there is shown a cross-sectional structural view of a first embodiment of a display module of the present invention.
- the display module includes:
- the liquid crystal display panel 110 includes a plurality of display pixel units 101.
- the display pixel unit 101 includes a transmissive area 102 and a non-transmissive area 103.
- the non-transmissive area 103 of at least part of the display pixel unit 101 has a photosensitive device 116 therein.
- a light source 120 on one side of the liquid crystal display panel 110; a protective layer 130 above the liquid crystal display panel 110 and the dot-like light source 120; the protective layer 130 facing away from the liquid crystal
- the surface of the display panel 110 and the point-like source 120 is a sensing surface 131, and the light generated by the point-like source 120 is obliquely projected into the protective layer 130 and transmitted through the protective layer 130.
- To the sensing surface 131 reflected light carrying fingerprint information is formed; the photosensitive device 116 collects the reflected light to obtain a fingerprint image.
- a photosensitive device 116 is integrated in the non-transmissive region 103 of the liquid crystal display panel 110, and the photosensitive device 116 is configured to collect reflected light carrying fingerprint information to obtain a fingerprint image; and the reflected light is collected by dots.
- the light generated by the light source 120 is conducted on the sensing surface 131 through the protective layer 130; since the light generated by the point-like light source 120 has strong consistency, less stray light; The point-like light source 120 is located on one side of the liquid crystal display panel 110. Therefore, the light generated by the point-like light source 120 is directly projected into the protective layer 130 without transmitting the liquid crystal display panel 110.
- the point pattern source 120 is used to generate light that captures a fingerprint image.
- the point-like acquisition source 120 is an infrared source; specifically, the point-like source 120 is a near-infrared source according to the type and technical parameters of the photosensitive device 116.
- the method of setting the spot-like light source 120 as an infrared light source can effectively reduce the propagation process of the light generated by the point-like light source 120 in the protective layer 130, and the reflected light is formed by the photosensitive light.
- the effect of the acquisition process of the device 116 on the image display function of the liquid crystal display panel 110 can obtain a clear fingerprint image under the premise of ensuring the display effect, which is beneficial to better integration of the fingerprint recognition and image display functions.
- the wavelength of the display light formed by the liquid crystal display panel 110 is generally in the range of 400 nm to 700 nm, so that the point-like drawing source 120 generates The wavelength of the light ranges from 700 nm to 1500 nm.
- the point-like drawing light source 120 is an LED lamp; specifically, the point-like drawing source 120 is an infrared LED lamp.
- the protective layer 130 is located on the point-like drawing source 120 to provide a protection function.
- the sensing surface 131 is a surface of the protective layer 130 facing away from the point-like drawing light source 120 for accepting a touch to implement fingerprint collection.
- the protective layer 130 is a cover glass of the display module.
- the light generated by the point pattern light source 120 is conducted through the protective layer 130, obliquely
- the image is projected onto the sensing surface 131, and reflected or refracted on the sensing surface 131, and reflected light carrying fingerprint information is formed on the sensing surface 131.
- the liquid crystal display panel 110 is configured to display a dynamic or static pattern to implement an image display function; the photosensitive device 116 is capable of collecting the reflected light and photoelectrically converting the reflected light to obtain a fingerprint image, so The liquid crystal display panel 110 can realize integration of fingerprint recognition and image display functions.
- the liquid crystal display panel 110 includes a plurality of display pixel units 101 including a transmissive region 102 and a non-transmissive region 103, and the photosensitive device 116 is located at least partially in the non-transmissive region 103 of the display pixel unit 101. .
- the non-transmissive region 103 is inherently present in the liquid crystal display panel 110, the presence of the non-transmissive region 103 does not affect the image display function of the liquid crystal display panel 110, and thus the photosensitive device is The 116 is disposed in the non-transmissive region 103, and can effectively reduce the influence of the photosensitive device 116 on the display function of the liquid crystal display panel 110.
- the point-like drawing light source 120 has better light uniformity and less stray light; and the point-like drawing light source 120 is located on one side of the liquid crystal display panel 110, and the generated light directly passes through the
- the protective layer 130 is conducted on the sensing surface 131 without transmissing the liquid crystal display panel 110, so that the light is less likely to be scattered before being transmitted to the sensing surface 131, and less interference light is generated. Therefore, in the reflected light formed on the sensing surface 131, the signal light intensity is large, and the interference light intensity is weak, and the signal noise of the reflected light collected by the photosensitive device 116 is relatively high, which is favorable for obtaining high quality. Fingerprint image.
- the photosensitive device 116 can also obtain a clear fingerprint image, that is, It is said that the thickness of the protective layer 130 can be effectively ensured, and the display effect of the liquid crystal display panel 110 can be ensured, thereby ensuring good manufacturing. Under the premise of the rate, the integration of fingerprint recognition and image display functions is realized.
- the liquid crystal display panel 110 is based on amorphous A liquid crystal display panel of an Amorphous Silicon Thin Film Transistor (a-Si: H TFT).
- a-Si Amorphous Silicon Thin Film Transistor
- the liquid crystal display panel may also be a liquid crystal display panel based on a Low Temperature Polysilicon Thin Film Transistor (LTP-Si TFT) or an Indium Gallium Zinc Oxide Thin Film Transistor (Indium Gallium). Liquid crystal display panel of Zinc Oxide Thin Film Transistor, IGZO TFT).
- the display module further includes a display backlight (not shown).
- the light generated by the display backlight can be transmitted from the transmission region 102 of the display pixel unit 101 to form display light; the color and intensity of the display light transmitted from the different display pixel units 101 are different, thereby realizing the image display function.
- the photosensitive device 116 is disposed in the non-transmissive region 103, which can effectively prevent the setting of the photosensitive device 116 from affecting the display function of the liquid crystal display panel 110, thereby ensuring the display effect and obtaining a clear fingerprint.
- the image is beneficial for better integration of fingerprint recognition and image display functions.
- the point-like drawing light source 120 is located on one side of the liquid crystal display panel 110 , that is, in a plane parallel to the sensing surface 131 , and the point-like drawing light source 120 is projected. a side of the liquid crystal display panel 110 that is projected; the protective layer 130 covers the dot-like light source 120 and the liquid crystal display panel 110 for protecting the liquid crystal display panel 110 and the point-like drawing light source 120 and Other hardware devices.
- the light generated by the point-like light source 120 is obliquely projected into the protective layer 130 at a certain divergence angle, and is projected onto the sensing surface 131; the reflected light is also incident at a certain divergence angle.
- the sensing surface 131 is emitted and projected onto the photosensitive device 116.
- the liquid crystal display panel 110 includes an array substrate 111 and a color filter substrate 112 disposed opposite to each other, and a liquid crystal layer 113 filled between the array substrate 111 and the color filter substrate 112.
- the color filter substrate 112 includes a plurality of color filter units 112c and a black matrix 112b filled between the color filter units 112c.
- the color filter unit 112c is configured to shape a light generated by the display backlight Into colored light.
- the material of the color filter unit 112 is a photoresist material; the color filter unit 112 includes three sub-pixels of a red photoresist, a green photoresist, and a blue photoresist.
- the material of the black matrix 112b is also a photoresist material for achieving isolation between adjacent color filter units 112c; in addition, the black matrix 112b is black in color, so it is also capable of absorbing stray light, thereby improving the The display effect of the liquid crystal display panel.
- the color filter unit 112c needs to transmit light to enable the light generated by the display backlight to form colored light; and the light projected onto the black matrix 112b is
- the black matrix 112b absorbs; therefore, in each display pixel unit 101, the transmission region 102 corresponds to the color filter unit 112c, and the non-transmission region 103 corresponds to the black matrix 112b, that is, In the pixel unit 101, the area where the color filter unit 112c is located is the transmission area 102 of the pixel unit 101, and the area where the black matrix 112b is located is the non-transmission area of the pixel unit 101. 103.
- the array substrate 111 includes a device substrate (not shown) and a control device (not shown) on the surface of the device substrate.
- the device substrate is used to provide a process operation surface for the formation of the control device, and is also used to provide mechanical support for the control device;
- the control device is for controlling an electric field formed in the liquid crystal layer 113. The intensity, thereby controlling the deflection direction and the deflection angle of the liquid crystal in the liquid crystal layer 113.
- the array substrate 111 further includes: a transparent electrode (not shown) on the device substrate, connected to the control device, for forming an electric field in the liquid crystal layer 113, and in the control device Under the control of the intensity and direction of the formed electric field, the purpose of controlling the liquid crystal deflection direction and the deflection angle in the liquid crystal layer 113 to achieve image display is achieved.
- a transparent electrode (not shown) on the device substrate, connected to the control device, for forming an electric field in the liquid crystal layer 113, and in the control device Under the control of the intensity and direction of the formed electric field, the purpose of controlling the liquid crystal deflection direction and the deflection angle in the liquid crystal layer 113 to achieve image display is achieved.
- the transparent electrode can realize transmission of light, and the control device often has a metal layer for electrically conducting; therefore, the transparent electrode is located in a transmission region of the pixel unit 101.
- the control device is located in the non-transmissive region of the pixel unit 101, thereby preventing the control device from affecting the image display of the liquid crystal display panel.
- the transmission region 102 corresponds to the color filter unit 112c
- the non-transmission region 103 corresponds to the black matrix 112b, so as shown in FIG. 1, the transparent electrode and the color filter
- the position of the light unit 112c corresponds to the position of the black matrix 112b, that is, the orthographic projection of the transparent electrode on the color filter substrate 112 is within the range of the color filter unit 112c
- the orthographic projection of the control device on the color filter substrate 112 is within the range of the black matrix 112b.
- the photosensitive device 116 is formed on the device substrate of the array substrate 111, thereby enabling the The semiconductor device such as the photosensitive device 116 and the control device and the transparent electrode are formed by the same process flow, which can be beneficial to ensure the formation quality of the photosensitive device 116, and is advantageous for improving the device performance and manufacturing of the liquid crystal display panel 110. Yield.
- the photosensitive device 116 is disposed in the non-transmissive region 103; and the non-transmissive region 103 corresponds to the black matrix 112b,
- the photosensitive device 116 is located at a position corresponding to the black matrix 112b, that is, an orthographic projection of the photosensitive device 116 on the color filter substrate 112 is located at a position of the black matrix 112b; due to the black matrix 112b
- the presence of the liquid crystal display panel 110 does not affect the display effect of the liquid crystal display panel 110.
- the photosensitive device 116 is disposed at a position corresponding to the black matrix 112b, which can effectively reduce the display of the photosensitive device 116 on the liquid crystal display panel 110.
- the effect of the effect is conducive to the integration of fingerprint recognition and image display functions.
- the array substrate 111 is located between the color filter substrate 112 and the protective layer 130 , that is, the array substrate 111 is located on the color filter substrate 112 and sensed. Between faces 131.
- the array substrate may further be located on a side of the color filter substrate away from the protective layer, that is, the color filter substrate is located between the array substrate and the protective layer;
- the relative positional relationship between the array substrate and the color filter substrate in the liquid crystal display panel may be selected according to the specific requirements of the display module to ensure the display effect of the liquid crystal display panel.
- the thickness of the protective layer 130 is ensured, thereby facilitating better implementation of the base layer of fingerprint recognition and image display functions, and is advantageous for maintaining high manufacturing yield and low manufacturing cost.
- the photosensitive device 116 has a lighting surface (not shown) for collecting the reflected light.
- the lighting surface faces the sensing surface 131, and the reflected light carrying the fingerprint information is used.
- the sensing surface 131 is emitted, projected onto the lighting surface, and collected by the photosensitive device 116 for photoelectric conversion.
- the distance D between the lighting surface and the sensing surface 131 is greater than 0.4 mm.
- the sensing surface 131 Since the sensing surface 131 is located away from the protective layer 130 toward the liquid crystal display panel 110, the distance D between the lighting surface and the sensing surface 131 is too small, so that the thickness of the protective layer 130 is excessive. If the distance is too small, the distance D between the lighting surface and the sensing surface 131 is too small, which may cause excessive limitation on the thickness of the array substrate 111. Therefore, the formation process difficulty of the array substrate 111 may be increased, affecting the formation quality of the formed array substrate 111, affecting the quality of the photosensitive device 116, and may cause degradation of the display function of the display module and quality of the fingerprint image. The problem of falling.
- the point-like drawing light source 120 Since the uniformity of the light generated by the point-like light source 120 is relatively high, and the stray light is less, the point-like drawing light source 120 is located at one side of the liquid crystal display panel 110, and the light is projected to the sensing. The probability of being scattered before the surface 131 is small, and the signal noise of the reflected light formed on the sensing surface 131 is relatively high; therefore, the point-like drawing light source 120 and its position are the lighting surface and the A large distance D between the sensing surfaces 131 does not affect the premise of clear fingerprint image acquisition, and other functional structures (for example, a capacitive touch screen, etc.) can be provided between the liquid crystal display panel 110 and the protective layer 130. may.
- the liquid crystal display panel 110 further includes: a first polarizing plate 114a and a second polarizing film 114b disposed opposite to each other, the array substrate 111 and the color filter substrate 112. Located between the first polarizing plate 114a and the second polarizing plate 114b; the photosensitive device 116 is configured to collect reflected light transmitted through the first polarizing plate 114a.
- the first polarizing plate 114a is located between the array substrate 111 and the protective layer 130, and the second polarizing plate 114b is located at a distance of the color filter substrate 112 away from the protective layer 130. a side, wherein the second polarizing plate 114b is a polarizer for causing the light generated by the display backlight to form polarized light; the first polarizing plate 114a is an analyzer for forming an image display
- the light-receiving device 116 is configured to collect the reflected light transmitted through the first polarizing plate 114a.
- the spot-like light source 120 is a near-infrared light source, and the generated light is near-infrared light, that is, the reflected light is also near-infrared light, so the first polarizing plate 114a needs to be capable of transmitting the reflected light to prevent
- the presence of the first polarizer 114a affects the acquisition of a clear fingerprint image.
- the polarizing plate as a polarizer may be referred to as a first polarizing plate, and the polarizing plate as an analyzer may be referred to as a second polarizing plate.
- the liquid crystal display panel 110 further includes a sealant layer 115 between the array substrate 111 and the color filter substrate 112 and surrounding the liquid crystal display panel 110.
- the liquid crystal layer 113 is for sealing the liquid crystal.
- the sealant layer 115 of the liquid crystal display panel 110 is located between the color filter substrate 112 and the array substrate 111 to seal the liquid crystal layer 113; Located on a side of the sealant layer 115 away from the liquid crystal layer 113, that is, on the surface of the protective layer 130 facing the liquid crystal display panel 110, the projection of the sealant layer 115 surrounds the liquid crystal The projection of layer 113, and the projection of the sealant layer 115 is between the projection of the point-like source 120 and the projection of the layer of liquid crystal 113.
- the light generated by the dot-like light source 120 does not need to be transmitted through the liquid crystal display panel 110, and in particular, does not need to be transmitted through the liquid crystal layer 113, and is directly projected onto the protective layer 130, thereby effectively preventing the liquid crystal.
- the structure of the display panel 110 scatters light, thereby reducing the generation of stray light, and is beneficial to the improvement of the signal-to-noise ratio. Improve the quality of fingerprint images.
- the display module further includes: a light guiding member 140 having an incident surface 141 and a first exit surface 142, wherein the incident surface 141 faces the light emitting surface of the point pattern light source 120, An exit surface 142 faces the protective layer 130.
- the light generated by the point-like light source 120 is emitted from the light-emitting surface, enters the light guide 140 via the incident surface 141, and at least partially enters the light of the light guide 140 from the first An exit surface 142 exits and is projected into the protective layer 130.
- the material of the light guiding member 140 is a light transmissive glue, and the incident surface 141 of the light guiding member 140 is in contact with the light emitting surface of the point pattern light source 120, at least the light guiding The first exit surface 142 of the member 140 is in contact with the protective layer 140 toward a portion of the surface of the point-like source 120. Therefore, the light guiding member 140 can also achieve the fixing of the point-like drawing light source 120, and the light guiding member 140 is fixed by the connection with the protective layer 130.
- the light guide member 140 is further disposed on the surface of the liquid crystal display panel 110 with a light absorbing layer (not shown) for absorbing stray light, thereby reducing the liquid crystal display.
- a light absorbing layer (not shown) for absorbing stray light, thereby reducing the liquid crystal display.
- the interference of the light between the panel 110 and the point-like drawing light source 120 can better realize the integration of the image display function and the fingerprint recognition function, which is beneficial to the guarantee of the display effect and is beneficial to the acquisition of the fingerprint image.
- the light absorbing layer may be a dark ink having a light absorbing function.
- FIG. 2 there is shown a cross-sectional structural view of a second embodiment of the display module of the present invention.
- the present embodiment is the same as the first embodiment, and the present invention will not be described again.
- a difference between the embodiment and the previous embodiment is that the color filter substrate 212 is located between the array substrate 211 and the sensing surface 231, that is, the array substrate 211 is located on the color filter substrate 212.
- the relative positional relationship between the array substrate 211 and the color filter substrate 212 in the liquid crystal display panel 210 can be set according to the specific requirements of the display module, thereby effectively implementing fingerprint recognition and image display functions. Integration, which is beneficial to ensure the thickness of the protective layer 230, Conducive to maintaining high manufacturing yield and low production costs.
- the light generated by the display backlight is transmitted to the liquid crystal layer 213 after being transmitted through the array substrate 211, modulated by the liquid crystal molecules in the liquid crystal layer 213, and then transmitted through the color filter substrate 212.
- an image display function is realized.
- the photosensitive device 216 is formed on a device substrate (not shown) of the array substrate 211 and disposed in the non-transmissive region 203; and the non-transmissive region 203 is opposite to the black matrix 212b.
- the photosensitive device 216 is located at a position corresponding to the black matrix 212b, that is, the orthographic projection of the photosensitive device 216 on the color filter substrate 212 is located at the position of the black matrix 212b, so The photosensitive device 216 is configured to collect reflected light transmitted through the black matrix 212b.
- the black matrix 212b is mainly used to absorb stray light in the visible light band in the liquid crystal display panel 110, thereby preventing the metal layer in the control device from reflecting light and affecting the display effect, so the black matrix 212b is Visible light has a good absorption effect and has a certain light transmittance to the infrared light. Therefore, in the embodiment, the point source 220 is an infrared source, and the generated light has a wavelength range greater than 700 nm, thereby improving the transmittance of the reflected light by the black matrix 212b, which is beneficial to obtaining clear fingerprint information. .
- the liquid crystal layer 213 and the polarizing plate in the liquid crystal display panel 210 can perform a good modulation effect on visible light, thereby effectively implementing the image display function;
- the method of setting the point-like drawing light source 220 as an infrared light source, that is, acquiring fingerprint image by infrared light, can effectively avoid the influence of the liquid crystal display panel 210 on the fingerprint image collecting function, and is beneficial to image display and The function of fingerprint image recognition is compatible.
- the embodiment further includes a thickening layer 250 between the liquid crystal display panel 210 and the protective layer 230.
- the thickening layer 250 is laminated on the liquid crystal display panel 210 and the protective layer 230 between the thicknesses of the thickening layer 250 is in the range of 0.2 mm to 0.5 mm.
- the thickening layer 250 is used to increase the angular range of the exiting light from the point-like source 220 into the protective layer, thereby increasing the area of the imageable fingerprint.
- the thickness of the thickened layer 250 is not too large or too small.
- the thickness of the thickening layer 250 is too small, and the increased fingerprint area is not enough; the thickness of the thickening layer 250 is too thick, which significantly increases the thickness of the entire display module.
- the first embodiment is further different from the first embodiment in that the light guide 240 further includes a second exit surface 242 , and the second exit surface 242 faces the thickening layer 250 .
- the light generated by the point-like light source 220 enters the light guide 240, a part of the light is transmitted through the light guide 240, and is directly transmitted from the first exit surface 241.
- the protective layer 230 is projected onto the sensing surface 231; another portion of the light is conducted through the light guide 240, exits from the second exit surface 242, and is projected into the thickening layer 250. Then, the thickened layer 250 is conducted into the protective layer 230 and projected onto the sensing surface 231.
- the thickening layer 250 has a first surface (not shown) facing the protective layer 230 and a second surface (not shown) facing the liquid crystal display panel 210, and connecting the first surface a side of the one side and the second side (not shown); the light generated by the point source 220 passes through the side into the thickening layer 250, exits from the first side and is projected onto the Within the protective layer 230.
- the material of the light guiding member 240 is also a transparent glue, and the light emitting surface of the point pattern light source 220 is in contact with the incident surface 243, and the first exit surface 241 and the protective layer are 230 is in contact with the surface of the point-like acquisition source 220, which is in contact with the side of the thickened layer 250.
- FIG. 3 there is shown a cross-sectional structural view of a third embodiment of the display module of the present invention.
- the array substrate 311 is located on the color filter substrate 312 and the Between the protective layers 330, the array substrate 311 is located between the color filter substrate 312 and the sensing surface 331.
- the relative positional relationship between the array substrate 311 and the color filter substrate 312 in the liquid crystal display panel 310 can be set according to specific requirements of the display module, thereby effectively implementing fingerprint recognition and image display functions.
- the integration is beneficial to ensure the thickness of the protective layer 330, which is favorable for maintaining high manufacturing yield and low manufacturing cost.
- the embodiment is different from the previous embodiment in that, in this embodiment, the light guide 340 is a prism.
- the method of disposing the light guide 340 as a prism can effectively reduce the assembly difficulty of the light guide 340, improve the manufacturing yield and device performance of the display device, and facilitate display effects and fingerprint image quality. Guarantee.
- the light guiding member 340 is a right-angle prism having a first right-angled surface 341 and a second right-angled surface 342 perpendicular to each other, and connecting the first right-angled surface 341 and the second right-angled surface a slope 343 of the 342; the slope 343 is an incident surface of the light guide 341, the first right angle surface 341 is the first exit surface, and the second right angle surface 342 is the second exit surface.
- the first right angle surface 341 faces the protective layer 330 and is in conformity with the surface of the protective layer 330
- the second right angle surface 342 faces the thickening layer 350 and the thickening layer 350
- the sides are aligned, and the slope 343 faces the point-like source 320.
- the light generated by the point-like light source 320 is conducted through the light guide 340, and is directly projected into the protective layer 330 via the first right-angled edge 341, and partially through the second right-angled edge 342. Projected to the thickened layer 350, conducted through the thickened layer 350 into the protective layer 330.
- the distance between the devices 116 ensures the thickness of the protective layer 130, which is advantageous for maintaining the manufacturing yield of the display module; and can also provide a large selection for the selection of the light guide 340, thereby enabling Better achieve the purpose of improving the quality of fingerprint images and enhancing the display of images.
- FIG. 4 a cross-sectional structural view of a fourth embodiment of the display module of the present invention is shown.
- the array substrate 411 is located between the color filter substrate 412 and the protective layer 430, that is, the array substrate 411 is located between the color filter substrate 412 and the sensing surface 431.
- the relative positional relationship between the array substrate 411 and the color filter substrate 412 in the liquid crystal display panel 410 can be set according to the specific requirements of the display module, thereby effectively implementing fingerprint recognition and image display functions.
- the integration is beneficial to ensure the thickness of the protective layer 430, which is favorable for maintaining high manufacturing yield and low manufacturing cost.
- the light guide 440 is also a prism. However, the incident surface 443 of the light guide 440 is a curved surface that protrudes toward the point-like light source 420.
- the first exit surface 441 and the second exit surface 442 of the light guide 440 are perpendicular to each other, and the incident surface 443 is connected to the first exit surface 441 and the second exit surface 442.
- the incident surface 443 protruding toward the point pattern light source 420 can form a structure of a convex lens, so that the light generated by the point pattern light source 420 is guided by the light guide when it is projected into the light guide member 440.
- the member 440 converges to reduce the divergence angle of the light, thereby reducing the divergence angle of the reflected light formed on the sensing surface 431, which is beneficial to improving the quality of the formed fingerprint image, and is advantageous for reducing the probability of occurrence of fingerprint image distortion.
- the light guide member 440 having a convex curved surface toward the point-like drawing light source 420 constitutes a convex lens structure, so as to reduce the light divergence angle generated by the point-like drawing light source 420. the goal of.
- the display module further includes: a collecting lens, located in front of the light of the point-like drawing light source, for collecting the point-like drawing light source The light produced.
- the concentrating lens can effectively reduce the divergence angle of the light generated by the point-like drawing source, and can effectively improve the imaging quality of the display module; and the concentrating lens can be formed separately, which is beneficial to improve The imaging quality of the concentrating lens is set to improve the yield and device performance of the display module.
- FIG. 5 there is shown a cross-sectional structural view of a fifth embodiment of the display module of the present invention.
- the array substrate 511 is located between the color filter substrate 512 and the protective layer 530, that is, the array substrate 511 is located between the color filter substrate 512 and the sensing surface 531.
- the relative positional relationship between the array substrate 511 and the color filter substrate 512 in the liquid crystal display panel 510 can be set according to specific requirements of the display module, thereby effectively implementing fingerprint recognition and image display functions.
- the integration is beneficial to ensure the thickness of the protective layer 530, which is favorable for maintaining high manufacturing yield and low manufacturing cost.
- the display module further includes: a light shielding layer 560 located on a portion of the surface of the protective layer 530 facing the point-like drawing light source 520.
- the light shielding layer 550 exposes at least a portion of the protective layer 530 corresponding to the thickening layer 550.
- the light shielding layer 560 is used to block the point-like drawing light source 520 to prevent the point-like drawing light source 520 from being exposed to affect the user experience. Specifically, the light shielding layer 560 covers the surface of the protective layer 530 facing the point-like drawing light source 520, and is disposed at least at a position corresponding to the point-like drawing light source 520, that is, the point-like drawing A projection of the light source 520 on the surface of the protective layer 530 toward the point-like acquisition source 520 is located within the range of the light-shielding layer 560.
- the light-emitting surface (not shown) of the point-like light source 520 faces the side surface 553 of the thickening layer 550, and the light-shielding layer 560 exposes only the protective layer 530.
- a portion corresponding to the thickening layer 550 that is, a projection of the thickening layer 550 on the surface of the protective layer 530 toward the point-like drawing light source 520 is adjacent to the light shielding layer 560, Therefore, the light generated by the point-like light source 520 enters the thickening layer 550 through the side surface 553, and is emitted from the first surface 551 and projected into the protective layer 530.
- FIG. 6 there is shown a cross-sectional structural view of a sixth embodiment of the display module of the present invention.
- the array substrate 611 is located on the color filter substrate 612 and the Between the protective layers 630, that is, the array substrate 611 is located between the color filter substrate 612 and the sensing surface 631.
- the relative positional relationship between the array substrate 611 and the color filter substrate 412 in the liquid crystal display panel 610 can be set according to specific requirements of the display module, thereby effectively implementing fingerprint recognition and image display functions.
- the integration is beneficial to ensure the thickness of the protective layer 630, which is favorable for maintaining high manufacturing yield and low manufacturing cost.
- the angle between the side surface 653 and the first surface 651 is an acute angle
- the angle between the side surface 651 and the second surface 651 is an obtuse angle
- the thickening layer 650 protrudes toward the liquid crystal display panel 610 toward one end of the point pattern light source 620, and has a wedge shape, so that a portion of the thickening layer 650 protruding from the liquid crystal display panel 610 can serve as a thick layer 650.
- the function of the light guide member increases the area of the side surface 653 of the thickening layer 650, improves the intensity of light projected into the thickening layer 650, is beneficial to increase the light intensity of the reflected light, and is advantageous for clear fingerprint images. Obtained.
- the signal acquired by the photosensitive device has a relatively high signal-to-noise, and the protective layer can be effectively maintained.
- the thickness is favorable for the improvement of the manufacturing yield; and the increase of the distance between the sensing surface and the photosensitive device can be an optical device such as the thickening layer, the light guiding member, and the collecting lens.
- the setting provides the possibility to effectively adjust the accuracy of the optical path, which is beneficial to ensure the quality of the fingerprint image, and is beneficial to improving the image display effect, thereby enabling better integration of fingerprint recognition and image display functions under the premise of ensuring manufacturing yield. .
- FIG. 7 a schematic top view of a sensing surface of a seventh embodiment of the display module of the present invention is shown.
- the present embodiment is the same as the foregoing embodiment, and the present invention is not described herein again.
- the embodiment is different from the previous embodiment in that, in the embodiment, the point-like drawing light source 720 includes two or more LED lights, so the display module further includes: a lighting control unit 770, When the optical device collects an optical signal each time, the control station One of the LED lights in the point source 720 generates light.
- the point-like drawing light source 720 includes six LED lights, which are an LED light a, an LED light b, an LED light c, an LED light d, an LED light e, and an LED light f; the six LED lights are evenly distributed. Distributed on the same side of the liquid crystal display panel 710.
- the sensing surface 731 includes a plurality of drawing areas 771. Specifically, the number of the drawing areas 771 is 14, which is greater than the number of LED lights in the point-like drawing light source 720.
- Each of the dot-like acquisition sources 720 corresponds to a plurality of adjacent acquisition regions 771.
- each of the LED light sources 720 corresponds to four drawing areas 771.
- the LED lamp a corresponds to the first to fourth drawing regions 771 (as shown in A of FIG. 7); the LED lamp b corresponds to the third to sixth drawing regions 771. (area as shown by B in Fig. 7); the LED lamp c corresponds to the 5th to 8th drawing areas 771 (as shown by C in Fig.
- the LED lamp d and the 7th to the 10 drawing areas 771 correspond to each other (as shown by D in FIG. 7); the LED lights e correspond to the 9th to 12th drawing areas 771 (as shown by E in FIG. 7); The LED lamp f corresponds to the 11th to 14th drawing regions 771 (as shown by F in Fig. 7).
- the number of the drawing areas 771 is greater than the number of LED lights in the point-like drawing light source 720, and each of the point-like drawing light sources 720 corresponds to a plurality of adjacent drawing areas 771. . Therefore, the portions of the drawing area 771 corresponding to the adjacent LED lamps are the same, for example, the third and fourth drawing areas 771 correspond to both the LED lamp a and the LED lamp b; 9 and the 10th drawing area 871 correspond to both the LED lamp d and the LED lamp e.
- the lighting control unit 770 is further connected to the LED light in the point-like drawing light source 720 and the liquid crystal display panel 710, respectively, for determining that the drawing area 771 is touched, controlled and
- the drawing area 771 generates light from the nearest LED lamp, and controls the photosensitive device in the corresponding display pixel unit to collect light, thereby obtaining a fingerprint image, thereby ensuring that a fingerprint image of a sufficiently large area is collected for fingerprint recognition.
- a photosensitive device is disposed in at least a portion of the display pixel unit corresponding to the drawing region 771.
- the lighting control unit 770 includes a touch device capable of detecting whether the sensing surface 731 is touched and determining a touched drawing area; the lighting control unit 770 and the LED in the point-like drawing light source 720 The lights are connected to control the most suitable one of the dot-like light sources 720 (for example, the closest to the drawing area 771) to generate light when it is judged that the drawing area 771 is touched;
- the lighting control unit 770 is further connected to the liquid crystal display panel 710, and is configured to control, when the drawing area 771 is touched, to control the photosensitive device in the pixel unit corresponding to the drawing area 771 to collect light, thereby Get a fingerprint image.
- the selection of the suitable LED lamps can effectively increase the area of the sensing surface that is exposed to the light, and can collect a sufficiently large fingerprint area. In order to ensure the realization of fingerprint recognition, it is beneficial to reduce the difficulty and complexity of fingerprint recognition.
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Abstract
一种显示模组，包括：液晶显示面板，包括多个显示像素单元，显示像素单元包括透过区和非透过区，至少部分显示像素单元的非透过区内具有感光器件；点状采图光源，位于液晶显示面板的一侧；保护层，位于液晶显示面板和点状采图光源的上方；保护层背向液晶显示面板和点状采图光源的表面为感测面，点状采图光源所产生的光线斜向投射至保护层内，经保护层传导至感测面，形成携带有指纹信息的反射光；感光器件采集反射光以获得指纹图像。显示模组通过集成于液晶显示面板中的感光器件和点状采图光源的使用，在保证显示效果的前提下，得到清晰的指纹图像，从而更好地实现指纹识别和图像显示功能的集成。
Description
本发明涉及光学指纹识别领域，尤其涉及一种显示模组。
指纹成像识别技术，是通过指纹传感器采集到人体的指纹图像，然后与系统里的已有指纹成像信息进行比对，来判断正确与否，进而实现身份识别的技术。由于其使用的方便性，以及人体指纹的唯一性，指纹识别技术已经大量应用于各个领域。比如公安局、海关等安检领域，楼宇的门禁系统，以及个人电脑和手机等消费品领域等等。
指纹成像识别技术的实现方式有光学成像、电容成像、超声成像等多种技术。相对来说，光学指纹成像技术，其成像效果相对较好，设备成本相对较低。
另一方面，液晶显示面板以其体积小，重量轻，低辐射等优点广泛应用于各种领域。现有技术中，已有在将指纹城乡技术与液晶显示面板相结合的技术，从而在显示模组中集成指纹识别功能，但其通常是采用电容式指纹识别原理。
现有集成指纹识别功能的显示模组结构有待改进，性能有待提高。
发明内容
本发明解决的问题是提供一种显示模组，在保证制造良率的前提下，更好地实现指纹识别和图像显示功能的集成。
为解决上述问题，本发明提供一种显示模组，包括：
液晶显示面板，包括多个显示像素单元，所述显示像素单元包括透过区和非透过区，至少部分显示像素单元的非透过区内具有感光器
件；点状采图光源，位于所述液晶显示面板的一侧；保护层，位于所述液晶显示面板和所述点状采图光源的上方；所述保护层背向所述液晶显示面板和所述点状采图光源的表面为感测面，所述点状采图光源所产生的光线斜向投射至所述保护层内，经所述保护层传导至所述感测面，形成携带有指纹信息的反射光；所述感光器件采集所述反射光以获得指纹图像。
可选的，所述感光器件具有采集所述反射光的采光面；所述采光面和所述感测面之间的距离大于0.4mm。
可选的，所述液晶显示面板包括相对设置的阵列基板和彩色滤光基板，以及填充于所述阵列基板和所述彩色滤光基板之间的液晶层；所述阵列基板位于所述彩色滤光基板和所述感测面之间；或者，所述彩色滤光基板位于所述阵列基板和所述感测面之间。
可选的，所述彩色滤光基板包括多个彩色滤光单元和填充于所述彩色滤光单元之间的黑矩阵；所述透过区与所述彩色滤光单元相对应；所述非透过区与所述黑矩阵相对应。
可选的，所述彩色滤光基板位于所述阵列基板和所述感测面之间；所述感光器件用于采集透射所述黑矩阵的反射光。
可选的，所述液晶显示面板还包括：相对设置的第一偏振片和第二偏振片，所述阵列基板和所述彩色滤光基板位于所述第一偏振片和所述第二偏振片之间；所述感光器件用于采集透射所述第一偏振片或者所述第二偏振的反射光。
可选的，所述液晶显示面板还包括：框胶层，所述框胶层位于所述阵列基板和所述彩色滤光基板之间且包围所述液晶层；所述点状采图光源位于所述框胶层远离所述液晶层的一侧。
可选的，所述点状采图光源所产生光线的波长范围在700nm至1500nm范围内。
可选的，还包括：增厚层，位于所述液晶显示面板和所述保护层
之间。
可选的，还包括：导光件，具有入射面和第一出射面，所述入射面朝向所述点状采图光源的出光面，所述第一出射面朝向所述保护层；所述点状采图光源所产生的光线自所述出光面出射，经所述入射面进入所述导光件，至少部分进入所述导光件的光线从所述第一出射面出射，并投射至所述保护层内。
可选的，所述导光件还包括第二出射面，所述第二出射面朝向所述增厚层；部分进入所述导光件的光线从所述第二出射面出射，投射至所述增厚层，并经所述增厚层传导至所述保护层内。
可选的，所述入射面为朝向所述点状采图光源凸出的曲面。
可选的，所述导光件的材料为透光胶；所述入射面与所述点状采图光源的出光面相接触，至少所述导光件的第一出射面与所述保护层朝向所述点状采图光源的部分表面相接触。
可选的，还包括：遮光层，位于所述保护层朝向所述点状采图光源的部分表面上，所述遮光层至少露出所述保护层与所述增厚层相对应的部分。
可选的，所述遮光层至少设置于与所述点状采图光源相对应的位置。
可选的，所述增厚层具有朝向所述保护层的第一面和朝向所述液晶显示面板的第二面，以及连接所述第一面和第二面的侧面；所述点状采图光源所产生的光线经所述侧面进入所述增厚层，从所述第一面出射并投射至所述保护层内。
可选的，所述侧面垂直于所述第一面或所述第二面；或者，所述侧面与所述第一面之间的夹角为锐角，且与所述第二面之间夹角为钝角。
可选的，其特征在于，所述增厚层的厚度在0.2mm至0.5mm范
围内。
可选的，还包括：聚光透镜，位于所述点状采图光源的出光面前，用于汇聚所述点状采图光源所产生的光线。
可选的，所述点状采图光源为一个LED灯。
可选的，所述点状采图光源包括两个或三个以上LED灯；所述显示模组还包括：采光控制单元，用于在所述感光器件每次采集光线时，控制所述点状采图光源中的一个LED灯产生光线。
可选的，所述液晶显示面板为基于非晶硅薄膜晶体管的液晶显示面板、基于低温多晶硅薄膜晶体管的液晶显示面板或者基于铟镓锌氧化物薄膜晶体管的液晶显示面板。
与现有技术相比，本发明的技术方案具有以下优点：
所述液晶显示面板内的非透过区内集成有感光器件，所述感光器件用于采集携带有指纹信息的反射光以获得指纹图像；同时所述反射光是通过点状采图光源所产生光线经所述保护层传导而在所述感测面上形成的；由于所述点状采图光源所产生光线的一致性较强，杂散光较少；而且所述点状采图光源位于所述液晶显示面板的一侧，因此所述点状采图光源所产生光线直接投射至所述保护层内，无需透射所述液晶显示面板，光线在投射至所述感测面之前不会受到所述液晶显示面板中各种结构的影响，受到散射的几率较小，所以能够有效保持投射至所述感测面上光线的一致性，有效降低所述反射光中杂散光的成分；光线一致性的保持、杂散光成分的减少，能够有效提高所述感光器件所采集信号的信噪比，有利于高质量指纹图像的获得；而且所述感光器件所采集信号的信噪比的提高，使所述感光器件和所述感测面之间距离较大时也能够获得清晰的指纹图像，从而无需减小所述感光器件和所述感测面之间的距离，能够有效保证所述液晶显示面板的显示效果，保证所述保护层的厚度，进而能够在保证制造良率的前提下，实现指纹识别和图像显示功能的集成。
本发明可选方案中，所述液晶显示面板包括相对设置的阵列基板和彩色滤光基板，以及填充于所述阵列基板和所述彩色滤光基板之间的液晶层；所述阵列基板位于所述彩色滤光基板和所述感测面之间；或者，所述彩色滤光基板位于所述阵列基板和所述感测面之间，从而可以根据所述显示模组的具体要求，选择所述液晶显示面板中所述阵列基板和所述彩色滤光基板的相对位置关系，以保证所述液晶显示面板的显示效果，保证所述保护层的厚度，进而有利于更好的实现指纹识别和图像显示功能的基层，有利于维持较高的制造良率、较低的制作成本。
本发明可选方案中，所述彩色滤光基板包括多个彩色滤光单元和填充于所述彩色滤光单元之间的黑矩阵；所述显示像素单元的非透过区与所述黑矩阵的位置相对应，所以所述感光器件位于所述黑矩阵相对应的位置，即所述感光器件在所述彩色滤光基板上的正投影位于所述黑矩阵所在位置处；由于所述黑矩阵的存在并不影响所述液晶显示面板的显示效果，所以将所述感光器件设置于所述黑矩阵相对应的位置，能够有效降低所述感光器件对所述液晶显示面板显示效果的影响，有利于实现指纹识别和图像显示功能的集成。
本发明可选方案中，所述点状采图光源为红外光源，所产生光线的波长范围大于700nm，因此所述点状采图光源所产生光线在所述保护层内的传播，以及所形成反射光被所述感光器件采集的过程并不会对所述液晶显示面板的显示效果造成影响，能够有效的保证所述液晶显示面板的显示效果；特别是当所述彩色滤光基板位于所述阵列基板和所述感测面之间，所述黑矩阵对红外光的透过率较高，所述感光器件用于采集透射所述黑矩阵的反射光，因此将所述点状采图光源设置为红外光源的做法，还能够有效降低所述黑矩阵对所述指纹图像采集的影响，有利于清晰指纹图像的获得。
本发明可选方案中，由于所述点状彩图光源的采用和点状采图光源位置的设置，能够有效提高所述感光器件所采集信号的信噪比，能
够保证所述感光器件和所述感测面之间距离，不仅能够保证所述保护层的厚度，有利于制造良率的提高；还能够使所述增厚层、所述导光件和所述聚光透镜的设置成为可能，能够有效改善所获得指纹图像的质量，能够提高所述液晶显示面板的显示效果，有利于更好的兼顾指纹识别和图像显示的功能。
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明显示模组第一实施例的剖面结构示意图；
图2是本发明显示模组第二实施例的剖面结构示意图；
图3是本发明显示模组第三实施例的剖面结构示意图；
图4是本发明显示模组第四实施例的剖面结构示意图；
图5是本发明显示模组第五实施例的剖面结构示意图；
图6是本发明显示模组第六实施例的剖面结构示意图；
图7是本发明显示模组第七实施例垂直所述感测面的俯视结构示意图。
正如背景技术所述，现有技术多采用电容式指纹成像技术与自发光显示面板的显示模组进行集成。
为解决所述技术问题，本发明提供一种显示模组，通过集成于所
述液晶显示面板中的感光器件和所述点状采图光源的使用，在保证显示效果的前提下，得到清晰的指纹图像，从而更好地实现指纹识别和图像显示功能的集成。
为使本发明的上述目的、特征和优点能够更为明显易懂，下面结合附图对本发明的具体实施例做详细的说明。
参考图1，示出了本发明显示模组第一实施例的剖面结构示意图。
所述显示模组包括：
液晶显示面板110，包括多个显示像素单元101，所述显示像素单元101包括透过区102和非透过区103，至少部分显示像素单元101的非透过区103内具有感光器件116；点状采图光源120，位于所述液晶显示面板110的一侧；保护层130，位于所述液晶显示面板110和所述点状采图光源120的上方；所述保护层130背向所述液晶显示面板110和所述点状采图光源120的表面为感测面131，所述点状采图光源120所产生的光线斜向投射至所述保护层130内，经所述保护层130传导至所述感测面131，形成携带有指纹信息的反射光；所述感光器件116采集所述反射光以获得指纹图像。
所述液晶显示面板110内的非透过区103内集成有感光器件116，所述感光器件116用于采集携带有指纹信息的反射光以获得指纹图像；同时所述反射光是通过点状采图光源120所产生光线经所述保护层130传导而在所述感测面131上形成的；由于所述点状采图光源120所产生光线的一致性较强，杂散光较少；而且所述点状采图光源120位于所述液晶显示面板110的一侧，因此所述点状采图光源120所产生光线直接投射至所述保护层130内，无需透射所述液晶显示面板110，光线在投射至所述感测面131之前不会受到所述液晶显示面板110中各种结构的影响，受到散射的几率较小，所以能够有效保持投射至所述感测面131上光线的一致性，有效降低所述反射光中杂散光的成分；光线一致性的保持、杂散光成分的减少，能够有效提高所述感光器件116所采集信号的信噪比，有利于高质量指纹图像的获
得；而且所述感光器件116所采集信号的信噪比的提高，使所述感光器件116和所述感测面131之间距离较大时也能够获得清晰的指纹图像，从而无需减小所述感光器件116和所述感测面131之间的距离，能够有效保证所述液晶显示面板110的显示效果，保证所述保护层130的厚度，进而能够在保证制造良率的前提下，实现指纹识别和图像显示功能的集成。
下面结合附图详细说明本发明显示模组实施例的具体技术方案。
所述点状采图光源120用于产生采集指纹图像的光线。
本实施例中，所述点状采图光源120为红外光源；具体的，根据所述感光器件116的类型和技术参数，所述点状采图光源120为近红外光源。将所述点状采图光源120设置为红外光源的做法，能够有效降低所述点状采图光源120所产生光线在所述保护层130内的传播过程，以及所形成反射光被所述感光器件116的采集过程对所述液晶显示面板110图像显示功能的影响，能够在保证显示效果的前提下，得到清晰的指纹图像，有利于更好地实现指纹识别和图像显示功能的集成。
具体的，由于人视觉可以感受的可见光谱在390nm到780nm范围内，因此所述液晶显示面板110所形成显示光的波长一般在400nm到700nm范围内，所以所述点状采图光源120所产生光线的波长范围在700nm到1500nm范围内。
本实施例中，所述点状采图光源120为一个LED灯；具体的，所述点状采图光源120为一个红外LED灯。
所述保护层130位于所述点状采图光源120上，以起到保护功能。
所述感测面131为所述保护层130背向所述点状采图光源120的表面，用于接受触摸以实现指纹采集。具体的，本实施例中，所述保护层130为所述显示模组的盖板玻璃。
所述点状采图光源120所产生的光线经所述保护层130传导，斜
向投射至所述感测面131上，在所述感测面131上发生反射或者折射，在所述感测面131上形成携带有指纹信息的反射光。
所述液晶显示面板110用于显示动态或者静态的图案，以实现图像显示功能；所述感光器件116能够采集所述反射光，并将所述反射光进行光电转换，以获得指纹图像，所以所述液晶显示面板110能够实现指纹识别和图像显示功能的集成。
所述液晶显示面板110包括多个显示像素单元101，所述显示像素单元101包括透过区102和非透过区103，所述感光器件116位于至少部分显示像素单元101的非透过区103。
由于所述非透过区103是所述液晶显示面板110内固有存在的，所述非透过区103的存在并不会影响所述液晶显示面板110的图像显示功能，因此将所述感光器件116设置于所述非透过区103，能够有效降低所述感光器件116对所述液晶显示面板110显示功能的影响。
此外，所述点状采图光源120所产生光线的一致性较好，杂散光较少；而且所述点状采图光源120位于所述液晶显示面板110的一侧，所产生光线直接经所述保护层130传导至所述感测面131上，无需透射所述液晶显示面板110，因此在透射至所述感测面131上之前，光线受到散射的几率较小，所产生干扰光较少；所以在所述感测面131上所形成反射光中，信号光强度较大，干扰光强度较弱，所述感光器件116所采集反射光的信噪比较高，有利于获得高质量的指纹图像。
而且，由于所述反射光的信噪比较高，因此当所述感光器件116与所述感测面131之间距离较大时，所述感光器件116也能够获得清晰的指纹图像，也就是说，无需减小所述感光器件116和所述感测面131之间的距离，能够有效保证所述保护层130的厚度，保证所述液晶显示面板110的显示效果，进而能够在保证制造良率的前提下，实现指纹识别和图像显示功能的集成。
需要说明的是，本实施例中，所述液晶显示面板110为基于非晶
硅薄膜晶体管(Amorphous Silicon Thin Film Transistor，a-Si:H TFT)的液晶显示面板。但是本发明其他实施例中，所述液晶显示面板也可以是基于低温多晶硅薄膜晶体管(LowTemperature Poly Si Thin Film Transistor，LTP-Si TFT)的液晶显示面板或者基于铟镓锌氧化物薄膜晶体管(Indium Gallium Zinc Oxide Thin Film Transistor，IGZO TFT)的液晶显示面板。
所述显示模组还包括显示背光源(图中未标示)。所述显示背光源所产生的光线能够从所述显示像素单元101的透过区102实现透射以形成显示光；从不同显示像素单元101透射的显示光颜色、光强不同，从而实现图像显示功能。所以将所述感光器件116设置于所述非透过区103，能够有效防止所述感光器件116的设置对所述液晶显示面板110显示功能造成影响，有利于保证显示效果，并得到清晰的指纹图像，有利于更好地实现指纹识别和图像显示功能的集成。
如图1所示，所述点状采图光源120位于所述液晶显示面板110的一侧，即在平行所述感测面131的平面内，所述点状采图光源120投影位于所述液晶显示面板110投影的一侧；所述保护层130覆盖所述点状采图光源120和所述液晶显示面板110，用于保护所述液晶显示面板110和所述点状采图光源120以及其他硬件设备。
所以所述点状采图光源120所产生的光线以一定发散角斜向投射至所述保护层130内，投射至所述感测面131上；所述反射光也以一定的发散角从所述感测面131出射，投射至所述感光器件116上。
所述液晶显示面板110包括相对设置的阵列基板111和彩色滤光基板112，以及填充于所述阵列基板111和所述彩色滤光基板112之间的液晶层113。
所述彩色滤光基板112包括多个彩色滤光单元112c和填充于所述彩色滤光单元112c之间的黑矩阵112b。
所述彩色滤光单元112c用于使所述显示背光源所产生的光线形
成彩色光。一般来说，所述彩色滤光单元112的材料为光阻材料；所述彩色滤光单元112包括红色光阻、绿色光阻和蓝色光阻三个子像素。所述黑矩阵112b的材料也为光阻材料，用于实现相邻彩色滤光单元112c之间的隔离；此外所述黑矩阵112b的颜色为黑色，所以还能够吸收杂散光，从而提高所述液晶显示面板的显示效果。
在彩色滤光基板112中，所述彩色滤光单元112c需要光线透过才能够使所述显示背光源所产生的光线形成彩色光；而投射至所述黑矩阵112b上的光线则会所述黑矩阵112b吸收；因此在每个显示像素单元101中，所述透过区102与所述彩色滤光单元112c相对应，所述非透过区103与所述黑矩阵112b相对应，也就是说，所述像素单元101中，所述彩色滤光单元112c所在区域即为所述像素单元101的透过区102，所述黑矩阵112b所在区域即为所述像素单元101的非透过区103。
所述阵列基板111包括器件衬底(图中未标示)以及位于所述器件衬底表面的控制器件(图中未示出)。其中，所述器件衬底用于为所述控制器件的形成提供工艺操作表面，还用于为所述控制器件提供机械支撑；所述控制器件用于控制所述液晶层113内所形成电场的强度，从而控制所述液晶层113内液晶的偏转方向和偏转角度。
所述阵列基板111还包括：透明电极(图中未标示)，位于所述器件衬底上，与所述控制器件相连，用于在所述液晶层113内形成电场，并在所述控制器件的控制下调节所形成电场的强度和方向，从而达到控制所述液晶层113内液晶偏转方向和偏转角度、实现图像显示的目的。
所述阵列基板111中，所述透明电极能够实现光线的透射，所述控制器件内往往具有实现电学导通的金属层；因此所述透明电极位于所述像素单元101的透过区内，所述控制器件位于所述像素单元101的非透过区内，从而防止所述控制器件影响所述液晶显示面板的图像显示。
由于所述透过区102与所述彩色滤光单元112c相对应，所述非透过区103与所述黑矩阵112b相对应，因此如图1所示，所述透明电极与所述彩色滤光单元112c位置对应，所述控制器件与所述黑矩阵112b位置对应，即所述透明电极在所述彩色滤光基板112上的正投影位于所述彩色滤光单元112c的范围内，所述控制器件在所述彩色滤光基板112上的正投影位于所述黑矩阵112b的范围内。
由于所述彩色滤光单元112c和所述黑矩阵112b的材料主要为光刻胶，因此本实施例中，所述感光器件116形成于所述阵列基板111的器件衬底上，从而能够使所述感光器件116和所述控制器件、所述透明电极等半导体结构通过同一工艺流程形成，能够有利于保证所述感光器件116的形成质量，有利于改善所述液晶显示面板110的器件性能和制造良率。
具体的，为了避免影响所述液晶显示面板110的图像显示功能，所述感光器件116设置于所述非透过区103；而所述非透过区103与所述黑矩阵112b相对应，因此所述感光器件116位于所述黑矩阵112b相对应的位置，即所述感光器件116在所述彩色滤光基板112上的正投影位于所述黑矩阵112b所在位置处；由于所述黑矩阵112b的存在并不影响所述液晶显示面板110的显示效果，所以将所述感光器件116设置于所述黑矩阵112b相对应的位置，能够有效降低所述感光器件116对所述液晶显示面板110显示效果的影响，有利于实现指纹识别和图像显示功能的集成。
如图1所示，本实施例中，所述阵列基板111位于所述彩色滤光基板112和所述保护层130之间，即所述阵列基板111位于所述彩色滤光基板112和感测面131之间。本发明其他实施例中，所述阵列基板还可以位于所述彩色滤光基板远离所述保护层的一侧，即所述彩色滤光基板位于所述阵列基板和所述保护层之间；因此可以根据所述显示模组的具体要求，选择所述液晶显示面板中所述阵列基板和所述彩色滤光基板的相对位置关系，以保证所述液晶显示面板的显示效果，
保证所述保护层130的厚度，进而有利于更好的实现指纹识别和图像显示功能的基层，有利于维持较高的制造良率、较低的制作成本。
具体的，所述感光器件116具有采集所述反射光的采光面(图中未标示)；本实施例中，所述采光面朝向所述感测面131，携带有指纹信息的反射光从所述感测面131出射，投射至所述采光面上，被所述感光器件116采集以进行光电转换。
本实施例中，所述采光面和所述感测面131之间的距离D大于0.4mm。
由于所述感测面131位于所述保护层130背向所述液晶显示面板110，因此所述采光面和所述感测面131之间距离D过小，会使所述保护层130厚度过小，则可能会影响所述保护层130的保护能力；此外，所述采光面和所述感测面131之间距离D过小，也会对所述阵列基板111的厚度造成过大的限制，从而可能会造成所述阵列基板111形成工艺难度增大，影响所形成阵列基板111的形成质量，影响所述感光器件116的质量，可能会造成所述显示模组显示功能退化、指纹图像质量下降的问题。
由于所述点状采图光源120所产生光线的一致性较高，杂散光较少，所述点状采图光源120位于所述液晶显示面板110的一侧，光线在投射至所述感测面131上之前受到散射的几率较小，在所述感测面131上形成反射光的信噪比较高；因此所述点状采图光源120及其位置，是所述采光面和所述感测面131之间具有较大距离D而不影响清晰指纹图像采集的前提，能够使所述液晶显示面板110和所述保护层130之间设置其他功能结构(例如：电容式触摸屏等)成为可能。
需要说明的是，根据所述液晶显示的原理，所述液晶显示面板110还包括：相对设置的第一偏振片114a和第二偏振片114b，所述阵列基板111和所述彩色滤光基板112位于所述第一偏振片114a和所述第二偏振片114b之间；所述感光器件116用于采集透射所述第一偏振片114a的反射光。
本实施例中，所述第一偏振片114a位于所述阵列基板111和所述保护层130之间，所述第二偏振片114b位于所述彩色滤光基板112远离所述保护层130的一侧，其中，所述第二偏振片114b为起偏器，用于使所述显示背光源所产生的光线形成偏振光；所述第一偏振片114a为检偏器，用于形成实现图像显示的显示光；所述感光器件116用于采集透射所述第一偏振片114a的反射光。
具体的，所述反射光在所述感测面131上形成后，从所述保护层130出射，需透射所述第一偏振片114a才能被所述感光器件116采集；而且本实施例中，所述点状采图光源120为近红外光源，所产生光线为近红外光，即所形成反射光也为近红外光，所以所述第一偏振片114a需要能够透射所述反射光，以防止所述第一偏振片114a的存在影响清晰指纹图像的采集。
在其他实施例中，也可以把做为起偏器的偏振片叫第一偏振片，把做为检偏器的偏振片叫第二偏振片。
由于液晶为液态，具有流动性，因此所述液晶显示面板110还包括：框胶层115，所述框胶层115位于所述阵列基板111和所述彩色滤光基板112之间且包围所述液晶层113，用于密封液晶。
本实施例中，所述液晶显示面板110的框胶层115位于所述彩色滤光基板112和所述阵列基板111之间，以密封所述液晶层113；所以所述点状采图光源120位于所述框胶层115远离所述液晶层113的一侧，也就是说，在所述保护层130朝向所述液晶显示面板110的表面上，所述框胶层115的投影包围所述液晶层113的投影，而且所述框胶层115的投影位于所述点状采图光源120投影和所述液晶层113投影之间。
所以所述点状采图光源120所产生光线无需透射所述液晶显示面板110，特别是不需要透射所述液晶层113，而直接投射至所述保护层130上，从而能够有效防止所述液晶显示面板110内结构对光线的散射，从而有利于减少杂散光的产生，有利于信噪比的改善，有利
于指纹图像质量的提高。
本实施例中，所述显示模组还包括：导光件140，具有入射面141和第一出射面142，所述入射面141朝向所述点状采图光源120的出光面，所述第一出射面142朝向所述保护层130。
所以，所述点状采图光源120所产生的光线自所述出光面出射，经所述入射面141进入所述导光件140，至少部分进入所述导光件140的光线从所述第一出射面142出射，并投射至所述保护层130内。
具体的，本实施例中，所述导光件140的材料为透光胶，所述导光件140的入射面141与所述点状采图光源120的出光面相接触，至少所述导光件140的第一出射面142与所述保护层140朝向所述点状采图光源120的部分表面相接触。所以所述导光件140还能够实现所述点状采图光源120的固定，所述导光件140通过与所述保护层130的连接以实现固定。
需要说明的是，本实施例中，所述导光件140靠近所述液晶显示面板110的表面上还设置有吸光层(图中未标示)，用于吸收杂散光，从而减少所述液晶显示面板110和所述点状采图光源120之间光线的干扰，更好的实现图像显示功能和指纹识别功能的集成，有利于显示效果的保证，有利于清洗指纹图像的获得。具体的，所述吸光层可以是具有吸光功能的深色油墨。
参考图2，示出了本发明显示模组第二实施例的剖面结构示意图。
本实施例与第一实施例相同之处，本发明再次不再赘述。本实施例与前述实施例的一个不同之处为所述彩色滤光基板212位于所述阵列基板211和所述感测面231之间，即所述阵列基板211位于所述彩色滤光基板212远离所述保护层230的一侧。所以所述液晶显示面板210中所述阵列基板211和所述彩色滤光基板212的相对位置关系，可以根据所述显示模组的具体要求而设定，从而能够有效实现指纹识别和图像显示功能的集成，有利于保证所述保护层230的厚度，
有利于维持较高的制造良率、较低的制作成本。
所述显示背光源所产生的光线在透射所述阵列基板211之后，传导至所述液晶层213内，被所述液晶层213内的液晶分子调制，再透射所述彩色滤光基板212出射，以形成显示光，实现图像显示功能。
所述感光器件216形成于所述阵列基板211的器件衬底(图中未标示)上，且设置于所述非透过区203；而所述非透过区203与所述黑矩阵212b相对应，因此所述所述感光器件216位于所述黑矩阵212b相对应的位置，即所述感光器件216在所述彩色滤光基板212上的正投影位于所述黑矩阵212b所在位置处，所以所述感光器件216用于采集透射所述黑矩阵212b的反射光。
此外，所述黑矩阵212b主要是用于在所述液晶显示面板110中，吸收可见光波段的杂散光，从而防止所述控制器件中金属层反射光线而影响显示效果，因此所述黑矩阵212b对可见光具有较好的吸收作用，对所述红外光具有一定的透光性。所以本实施例中，所述点状采图光源220为红外光源，所产生光线的波长范围大于700nm，从而提高所述黑矩阵212b对所形成反射光的透射率，有利于清晰指纹信息的获得。
另外，根据液晶显示面板210所形成显示光的波长范围，所述液晶显示面板210中的液晶层213和偏振片等均能够对可见光起到良好的调制作用，从而能够有效实现图像显示功能；所以将所述点状采图光源220设置为红外光源，即通过红外光实现指纹图像采集的做法，能够有效避免所述液晶显示面板210对所述指纹图像采集功能的影响，有利于实现图像显示和指纹图像识别的功能兼容。
此外，如图2所示，本实施例中与第一实施例另一个不同之处为：本实施例还包括增厚层250，位于所述液晶显示面板210和所述保护层230之间。
所述增厚层250层叠于所述液晶显示面板210和所述保护层230
之间，所述增厚层250的厚度在0.2mm到0.5mm围内。所述增厚层250用于增加点状采图光源220出射光进入保护层的角度范围，从而增加可成像的指纹面积。所述增厚层250的厚度不宜太大也不宜太小。所述增厚层250的厚度太小，增加的指纹面积不够多；所述增厚层250的厚度太厚，会明显增加整个显示模组的厚度。
如图2所示，本实施例中与第一实施例再一个不同之处为：所述导光件240还包括第二出射面242，所述第二出射面242朝向所述增厚层250；部分进入所述导光件240的光线从所述第二出射面242出射，投射至所述增厚层250，并经所述增厚层250传导至所述保护层230内。
所以，本实施例中，所述点状采图光源220所产生的光线在进入所述导光件240之后，一部分光线经所述导光件240传导，从所述第一出射面241直接透射至所述保护层230内，并投射至所述感测面231上；另一部分光线经所述导光件240传导，从所述第二出射面242出射，投射至所述增厚层250内，之后经所述增厚层250传导至所述保护层230内，再投射至所述感测面231上。
具体的，所述增厚层250具有朝向所述保护层230的第一面(图中未标示)和朝向所述液晶显示面板210的第二面(图中未标示)，以及连接所述第一面和第二面的侧面(图中未标示)；所述点状采图光源220所产生的光线经所述侧面进入所述增厚层250，从所述第一面出射并投射至所述保护层230内。
本实施例中，所述导光件240的材料也为透明胶，所述点状采图光源220的出光面与所述入射面243相接触，所述第一出射面241与所述保护层230朝向所述点状采图光源220的表面相接触，所述第二出射面242与所述增厚层250的侧面相接触。
参考图3，示出了本发明显示模组第三实施例的剖面结构示意图。
本实施例中，所述阵列基板311位于所述彩色滤光基板312和所
述保护层330之间，即所述阵列基板311位于所述彩色滤光基板312和感测面331之间。所述液晶显示面板310中所述阵列基板311和所述彩色滤光基板312的相对位置关系，可以根据所述显示模组的具体要求而设定，从而能够有效实现指纹识别和图像显示功能的集成，有利于保证所述保护层330的厚度，有利于维持较高的制造良率、较低的制作成本。
本实施例与前述实施例不同之处在于，本实施例中，所述导光件340为棱镜。将所述导光件340设置为棱镜的做法，能够有效减小所述导光件340的装配难度，有利于提高所述显示装置的制造良率和器件性能，有利于显示效果和指纹图像质量的保证。
具体的，本实施例中，所述导光件340为直角棱镜，具有相互垂直的第一直角面341和第二直角面342，以及连接所述第一直角面341和所述第二直角面342的斜面343；所述斜面343为所述导光件341的入射面，所述第一直角面341为所述第一出射面，所述第二直角面342为所述第二出射面。
所以，所述第一直角面341朝向所述保护层330且与所述保护层330的表面相贴合，所述第二直角面342朝向所述增厚层350且与所述增厚层350的侧面相贴合，所述斜面343朝向所述点状采图光源320。所述点状采图光源320所产生的光线，经所述导光件340传导，部分经所述第一直角边341直接投射至所述保护层330内，部分经所述第二直角边342投射至所述增厚层350，经所述增厚层350传导至所述保护层330内。
由于所述点状采图光源320所形成的光线具有较高的一致性、较少的杂散光，所形成反射光的信噪比较高，能够有效保证所述感测面131和所述感光器件116之间的距离，保证所述保护层130的厚度，有利于维持所述显示模组的制造良率；而且还能够为所述导光件340的选择提供较大的选择余地，从而能够更好的达到改善指纹图像质量、增强图像显示效果的目的。
参考图4，示出了本发明显示模组第四实施例的剖面结构示意图。
本实施例中，所述阵列基板411位于所述彩色滤光基板412和所述保护层430之间，即所述阵列基板411位于所述彩色滤光基板412和感测面431之间。所述液晶显示面板410中所述阵列基板411和所述彩色滤光基板412的相对位置关系，可以根据所述显示模组的具体要求而设定，从而能够有效实现指纹识别和图像显示功能的集成，有利于保证所述保护层430的厚度，有利于维持较高的制造良率、较低的制作成本。
本实施例与第三实施例类似，所述导光件440也为棱镜，但是，所述导光件440的入射面443为朝向所述点状采图光源420凸出的曲面。
所述导光件440的第一出射面441和第二出射面442相互垂直，所述入射面443连接所述第一出射面441和所述第二出射面442。朝向所述点状采图光源420凸起的入射面443能够形成凸透镜的结构，从而使所述点状采图光源420所产生光线在投射进入所述导光件440时，被所述导光件440汇聚，减小光线的发散角，从而减小在所述感测面431上形成反射光的发散角，有利于改善所形成指纹图像的质量，有利于减少指纹图像畸变现象出现的几率。
需要说明的是，本实施例中，通过具有朝向所述点状采图光源420凸出曲面的导光件440构成凸透镜结构，以实现减小所述点状采图光源420所产生光线发散角的目的。
但是这种做法仅为一实例，本发明其他实施例中，所述显示模组还包括：聚光透镜，位于所述点状采图光源的出光面前，用于汇聚所述点状采图光源所产生的光线。所述聚光透镜的设置，能够有效达到减小所述点状采图光源所产生光线的发散角，能够有效的改善所述显示模组成像质量；而且聚光透镜可以单独形成，有利于提高所设置聚光透镜的成像质量，有利于所述显示模组制作良率和器件性能的提高。
参考图5，示出了本发明显示模组第五实施例的剖面结构示意图。
本实施例中，所述阵列基板511位于所述彩色滤光基板512和所述保护层530之间，即所述阵列基板511位于所述彩色滤光基板512和感测面531之间。所述液晶显示面板510中所述阵列基板511和所述彩色滤光基板512的相对位置关系，可以根据所述显示模组的具体要求而设定，从而能够有效实现指纹识别和图像显示功能的集成，有利于保证所述保护层530的厚度，有利于维持较高的制造良率、较低的制作成本。
本实施例与前述实施例不同之处在于，本实施例中，所述显示模组还包括：遮光层560，位于所述保护层530朝向所述点状采图光源520的部分表面上，所述遮光层550至少露出所述保护层530与所述增厚层550相对应的部分。
所述遮光层560用于遮挡所述点状采图光源520，以防止所述点状采图光源520露出而影响用户体验。具体的，所述遮光层560覆盖所述保护层530朝向所述点状采图光源520的表面，且至少设置于所述点状采图光源520所对应的位置，即所述点状采图光源520在所述保护层530朝向所述点状采图光源520表面上的投影位于所述遮光层560的范围内。
另一方面，本实施例中，所述点状采图光源520的出光面(图中未标示)朝向所述增厚层550的侧面553，且所述遮光层560仅露出所述保护层530与所述增厚层550相对应的部分，也就是说，所述增厚层550在所述保护层530朝向所述点状采图光源520表面上的投影与所述遮光层560相邻，所以所述点状采图光源520所产生的光线经所述侧面553进入所述增厚层550，从所述第一面551出射并投射至所述保护层530内。
参考图6，示出了本发明显示模组第六实施例的剖面结构示意图。
本实施例中，所述阵列基板611位于所述彩色滤光基板612和所
述保护层630之间，即所述阵列基板611位于所述彩色滤光基板612和感测面631之间。所述液晶显示面板610中所述阵列基板611和所述彩色滤光基板412的相对位置关系，可以根据所述显示模组的具体要求而设定，从而能够有效实现指纹识别和图像显示功能的集成，有利于保证所述保护层630的厚度，有利于维持较高的制造良率、较低的制作成本。
本实施例与前述实施例不同之处在于，本实施例中，所述侧面653与所述第一面651之间夹角为锐角，且与所述第二面651之间夹角为钝角。
具体的，所述增厚层650朝向所述点状采图光源620的一端伸出所述液晶显示面板610，且呈楔形，因此伸出所述液晶显示面板610的部分增厚层650能够充当导光件的作用，从而增大所述增厚层650侧面653的面积，提高投射至所述增厚层650内光线的强度，有利于提高所形成反射光的光强，有利于清晰指纹图像的获得。
参考图1至图6，由于所述点状采图光源所产生光线的一致性较强，杂散光较少，所述感光器件所采集信号的信噪比较高，能够有效维持所述保护层厚度，有利于制造良率的提高；而且所述感测面和所述感光器件之间距离的增大，能够为所述增厚层、所述导光件以及所述聚光透镜等光学设备的设置提供可能，能够有效调节光路的精准性，有利于保证指纹图像质量，有利于改善图像显示效果，从而能够在保证制造良率的前提下，更好的实现指纹识别和图像显示功能的集成。
参考图7，示出了本发明显示模组第七实施例垂直所述感测面的俯视结构示意图。
本实施例，本实施例与前述实施例相同之处，本发明在此不再赘述。本实施例与前述实施例不同之处在于，本实施例中，所述点状采图光源720包括两个或三个以上LED灯，所以所述显示模组还包括：采光控制单元770，用于在所述感光器件每次采集光信号时，控制所
述点状采图光源720中的一个LED灯产生光线。
具体的，所述点状采图光源720包括6个LED灯，分别为LED灯a、LED灯b、LED灯c、LED灯d、LED灯e以及LED灯f；所述6个LED灯均匀分布于所述液晶显示面板710的同一侧。
所述感测面731包括多个采图区域771。具体的，所述采图区域771的数量为14个，大于所述点状采图光源720中LED灯的数量。所述点状采图光源720中每个LED灯与多个相邻采图区域771相对应。本实施例中，所述点状采图光源720中每个LED灯与4个采图区域771相对应。具体的，所述LED灯a与第1至第4个采图区域771相对应(如图7中A所示区域)；所述LED灯b与第3至第6个采图区域771相对应(如图7中B所示区域)；所述LED灯c与第5至第8个采图区域771相对应(如图7中C所示区域)；所述LED灯d与第7至第10个采图区域771相对应(如图7中D所示区域)；所述LED灯e与第9至第12个采图区域771相对应(如图7中E所示区域)；所述LED灯f与第11至第14个采图区域771相对应(如图7中F所示区域)。
而且，所述采图区域771的数量大于所述点状采图光源720中LED灯的数量，所述点状采图光源720中每个LED灯与多个相邻的采图区域771相对应。因此，相邻所述LED灯所对应的采图区域771部分相同，例如第3和第4个采图区域771既与所述LED灯a相对应，也与所述LED灯b相对应；第9和第10个采图区域871既与所述LED灯d相对应，也与所述LED灯e相对应。
本实施例中，所述采光控制单元770还分别于所述点状采图光源720中的LED灯以及所述液晶显示面板710相连，用于在判断所述采图区域771受到触摸，控制与所述采图区域771距离最近的LED灯产生光线，并控制所对应的显示像素单元中的感光器件采集光线，从而获得指纹图像，从而能够保证采集到足够大面积的指纹图像以进行指纹识别。
所述液晶显示面板710中，至少部分与所述采图区域771相对应的显示像素单元内设置有感光器件。所述采光控制单元770包括触控器件，能够探测所述感测面731是否受到触摸，并判断受到触摸的采图区域；所述采光控制单元770与所述点状采图光源720中的LED灯相连，用于在判断所述采图区域771受到触摸时，控制所述点状采图光源720中最合适的一个LED(例如，与所述采图区域771距离最近的)产生光线；所述采光控制单元770还与所述液晶显示面板710相连，用于在判断所述采图区域771受到触摸时，控制与所述采图区域771相对应显示像素单元中的感光器件采集光线，从而获得指纹图像。
当所述LED灯数量足够多，LED灯的排布密度足够大时，合适LED灯的选择，能够有效增大所述感测面上受到光线照射区域的面积，能够采集到足够大的指纹面积以保证指纹识别的实现，有利于降低指纹识别的难度和复杂程度。
更多有关本实施例所提供显示模组的结构、性质和优点可参考前述实施例相应内容。
虽然本发明披露如上，但本发明并非限定于此。任何本领域技术人员，在不脱离本发明的精神和范围内，均可作各种更动与修改，因此本发明的保护范围应当以权利要求所限定的范围为准。
Claims (22)
- 一种显示模组，其特征在于，包括：液晶显示面板，包括多个显示像素单元，所述显示像素单元包括透过区和非透过区，至少部分显示像素单元的非透过区内具有感光器件；点状采图光源，位于所述液晶显示面板的一侧；保护层，位于所述液晶显示面板和所述点状采图光源的上方；所述保护层背向所述液晶显示面板和所述点状采图光源的表面为感测面，所述点状采图光源所产生的光线斜向投射至所述保护层内，经所述保护层传导至所述感测面，形成携带有指纹信息的反射光；所述感光器件采集所述反射光以获得指纹图像。
- 如权利要求1所述的显示模组，其特征在于，所述感光器件具有采集所述反射光的采光面；所述采光面和所述感测面之间的距离大于0.4mm。
- 如权利要求1所述的显示模组，其特征在于，所述液晶显示面板包括相对设置的阵列基板和彩色滤光基板，以及填充于所述阵列基板和所述彩色滤光基板之间的液晶层；所述阵列基板位于所述彩色滤光基板和所述感测面之间；或者，所述彩色滤光基板位于所述阵列基板和所述感测面之间。
- 如权利要求3所述的显示模组，其特征在于，所述彩色滤光基板包括多个彩色滤光单元和填充于所述彩色滤光单元之间的黑矩阵；所述透过区与所述彩色滤光单元相对应；所述非透过区与所述黑矩阵相对应。
- 如权利要求4所述的显示模组，其特征在于，所述彩色滤 光基板位于所述阵列基板和所述感测面之间；所述感光器件用于采集透射所述黑矩阵的反射光。
- 如权利要求3所述的显示模组，其特征在于，所述液晶显示面板还包括：相对设置的第一偏振片和第二偏振片，所述阵列基板和所述彩色滤光基板位于所述第一偏振片和所述第二偏振片之间；所述感光器件用于采集透射所述第一偏振片或者所述第二偏振的反射光。
- 如权利要求3所述的显示模组，其特征在于，所述液晶显示面板还包括：框胶层，所述框胶层位于所述阵列基板和所述彩色滤光基板之间且包围所述液晶层；所述点状采图光源位于所述框胶层远离所述液晶层的一侧。
- 如权利要求1所述的显示模组，其特征在于，所述点状采图光源所产生光线的波长范围在700nm至1500nm范围内。
- 如权利要求1所述的显示模组，其特征在于，还包括：增厚层，位于所述液晶显示面板和所述保护层之间。
- 如权利要求9所述的显示模组，其特征在于，还包括：导光件，具有入射面和第一出射面，所述入射面朝向所述点状采图光源的出光面，所述第一出射面朝向所述保护层；所述点状采图光源所产生的光线自所述出光面出射，经所述入射面进入所述导光件，至少部分进入所述导光件的光线从所述第一出射面出射，并投射至所述保护层内。
- 如权利要求10所述的显示模组，其特征在于，所述导光件还包括第二出射面，所述第二出射面朝向所述增厚层；部分进入所述导光件的光线从所述第二出射面出射，投射至所述增厚层，并经所述增厚层传导至所述保护层内。
- 如权利要求10所述的显示模组，其特征在于，所述入射面为朝向所述点状采图光源凸出的曲面。
- 如权利要求10所述的显示模组，其特征在于，所述导光件的材料为透光胶；所述入射面与所述点状采图光源的出光面相接触，至少所述导光件的第一出射面与所述保护层朝向所述点状采图光源的部分表面相接触。
- 如权利要求9所述的显示模组，其特征在于，还包括：遮光层，位于所述保护层朝向所述点状采图光源的部分表面上，所述遮光层至少露出所述保护层与所述增厚层相对应的部分。
- 如权利要求14所述的显示模组，其特征在于，所述遮光层至少设置于与所述点状采图光源相对应的位置。
- 如权利要求9所述的显示模组，其特征在于，所述增厚层具有朝向所述保护层的第一面和朝向所述液晶显示面板的第二面，以及连接所述第一面和第二面的侧面；所述点状采图光源所产生的光线经所述侧面进入所述增厚层，从所述第一面出射并投射至所述保护层内。
- 如权利要求16所述的显示模组，其特征在于，所述侧面垂直于所述第一面或所述第二面；或者，所述侧面与所述第一面之间的夹角为锐角，且与所述第二面之间夹角为钝角。
- 如权利要求9～17任意一项权利要求所述的显示模组，其特征在于，所述增厚层的厚度在0.2mm至0.5mm范围内。
- 如权利要求1所述的显示模组，其特征在于，还包括：聚光透镜，位于所述点状采图光源的出光面前，用于汇聚所述点状采图光源所产生的光线。
- 如权利要求1所述的显示模组，其特征在于，所述点状采 图光源为一个LED灯。
- 如权利要求1所述的显示模组，其特征在于，所述点状采图光源包括两个或三个以上LED灯；所述显示模组还包括：采光控制单元，用于在所述感光器件每次采集光线时，控制所述点状采图光源中的一个LED灯产生光线。
- 如权利要求1所述的显示模组，其特征在于，所述液晶显示面板为基于非晶硅薄膜晶体管的液晶显示面板、基于低温多晶硅薄膜晶体管的液晶显示面板或者基于铟镓锌氧化物薄膜晶体管的液晶显示面板。
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