Abstract: A coating mask for bearing and covering a portion of a to-be-plated component includes at least one bearing unit. Each bearing unit includes a first bearing portion, a second bearing portion, and at least two ribbed plates. An annular groove is defined between the first bearing portion and the second bearing portion. The at least two ribbed plates are formed in the annular groove. Each of the at least two ribbed plates includes a first ribbed portion and a second ribbed portion connected to the first ribbed portion. The first ribbed portion is connected to the second bearing portion; the second ribbed portion is connected to the first bearing portion. An included angle ?1 is defined by the first ribbed portion and the second ribbed portion, and ?1 is an obtuse angle. The disclosure also relates to a coating device.

Abstract: A retaining ring for retaining lenses in a lens module carries an internal shape reducing the incidence of stray reflected light. The through hole in the retaining ring allows light to pass and a prismatic protrusion is disposed on a wall of the through hole. The protrusion has first and second inclined surfaces each at a specific angle. Acute angle ?1 is formed between the first inclined surface and end surface of ring, and acute angle ?2 is formed between the second inclined surface and other end surface of ring. Relationship between the acute angles are ?1>?2, and 60°??1+?2?80°. A lens module using such a retaining ring is also provided.

Abstract: A narrow-profile lens group for long-distance image capture includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, from object side to imaging side. Each lens has two surfaces, the group meeting formula 0.85<D/TTL<1.05, 0.37<(D*0.5)/F<0.45, where D is the maximum imaging circle diameter on the imaging surface; TTL is the distance from the center point of a surface of the first lens adjacent to the object side to the imaging surface, and F is the focal length of the telephoto lens.

Abstract: A fixing ring of a certain design for a lens module substantially reduces stray light. The fixing ring defines a central axis, and comprises a base surface and a processing surface, formed from an edge of the base surface. A first angle ?1 exists between a first side cut surface and a surface perpendicular to the central axis, a distance L1 and the first angle ?1 satisfy formulas 0.015 mm<L1<0.025 mm and 20°<?1<40°. The disclosure further provides a lens module and an electronic device comprising the fixing ring. An anti-dazzle film, matching with the fixing ring to completely absorb stray light, is included in the lens module.

Abstract: A lens module capable of reducing flare includes a lens cone, a lens group, and a light-shielding sheet group. The lens group comprises a plurality of lenses formed from an object side of the lens module to an image side of the lens module. The light-shielding sheet group comprises a plurality of light-shielding sheets. The plurality of light-shielding sheets is embedded between each adjacent two lenses of the plurality of lenses. A difference value between an inner diameter of the lens cone corresponding to a first light shielding sheets arranged from the image side to the object side and an outer diameter of the first light shielding sheets arranged from the image side to the object side is greater than 0.01 mm and less than 0.02 mm. The disclosure also relates to an electronic device.

Abstract: An optical lens includes a lens barrel and a lens group received in the lens barrel. The lens group includes a number of lenses stacked from an image side to an object side. Each of the lenses includes a first surface and a second surface coupled to the first surface. The first surface faces the object side. The second surface is parallel to an optical axis of the lens group. The first surface includes a connection region adjacent to the second surface. The connection region includes an optical microstructure. An included angle formed between the image side of the connection region and the second surface of at least one of the lenses is less than 15 degrees.

Abstract: A lens module includes a lens barrel and a lens group located within the lens barrel. The lens barrel defines a receiving cavity and a light hole. The receiving cavity receives the lens group. The lens barrel includes a protrusion protruding from an inner wall of the receiving cavity adjacent to the light hole. An inner surface of the protrusion facing the lens group is a rough surface.

Abstract: A lens module includes a lens barrel and a lens group including a number of lenses received in the lens barrel. Each of the lenses of the lens group includes a first surface facing an image side of the lens module. At least one of the lenses includes a blocking region on the first surface. The blocking region is coated with a light absorbing material.

Abstract: A lens module includes a lens barrel, a lens group, and a soma. The soma includes a first end surface facing an object side and a second end surface facing an image side. An end point of the lens group closest to the object side is defined as an origin. An angle formed by a line connecting the origin to a point on the first end surface closest to an optical axis and the optical axis is defined as a first angle ?. An angle formed by a line connecting the origin to a point on the second end surface closest to the optical axis and the optical axis is defined as a second angle ?. The first angle ? and the second angle ? satisfy the following relationship: ?>34.5° and ?-?<0.4°.

Abstract: A lens module includes a lens barrel and a number of lenses mounted in the lens barrel. The lens barrel includes a peripheral wall and a top wall. The top wall includes a light transmission hole. The top wall further includes a light shielding portion surrounding an opening of the light transmission hole. A distal end of the light shielding portion extends toward the plurality of lenses and blocks light.

Abstract: A camera lens to reduce abnormal images by rejecting stray or oblique light before it can reach an image sensor includes a hollow lens barrel, a lens assembly received in the lens barrel, and a light shield assembly received in the lens barrel. The lens assembly includes at least two lenses arranged from object side to image side. The light shield assembly includes light shields, each light shield being sandwiched between adjacent two lenses and defining a through hole. An inner wall of the through hole defines an inclined surface, the inclined surface reflects stray and/or oblique light back towards the object side, thus stray light is eliminated. The disclosure further provides a lens module and an electronic device including the camera lens.

Abstract: A lens assembly includes a lens barrel, a lens group, a gasket, and a light shielding group. The lens group includes a number of lenses. The light shielding group includes a number of shielding sheets defining a through hole. The gasket is located between two lenses on a light exiting side of the lens assembly. An inner portion of the gasket defines an inner hole for transmitting light. An aperture of the inner hole increases from an object side of the lens assembly to an image side of the lens assembly. An aperture D1 of the through hole adjacent to the gasket and adjacent to the object side, an aperture D2 of the inner hole adjacent to the object side, and an aperture D3 of the through hole adjacent to the gasket and adjacent to the image side satisfy a relationship 0.65<D1/D2<0.85; and D3?D2.

Abstract: The disclosure provides a handwriting board and a control method thereof. The handwriting board includes: a touch structure configured to sense the handwriting touch position; a filter display structure comprising a photonic crystal layer and a filter driving circuit, the photonic crystal layer comprises a periodic defect structure of the surface and a photo-dielectric filled in the periodic defect structure, and the filter driving circuit is used for applying a voltage to the photonic crystal layer to drive a change in the state of the photo-dielectric in the periodic defect structure; and a controller configured to control the filter driving circuit to drive a change in the state of the photo-dielectric in the photonic crystal layer in the corresponding region according to the handwriting touch position so as to change the forbidden band of the photonic crystal layer in the corresponding region.

Abstract: A fixing ring of a certain design for a lens module substantially reduces stray light. The fixing ring defines a central axis, and comprises a base surface and a processing surface, formed from an edge of the base surface. A first angle ?1 exists between a first side cut surface and a surface perpendicular to the central axis, a distance L1 and the first angle ?1 satisfy formulas 0.015 mm<L1<0.025 mm and 20°<?1<40°. The disclosure further provides a lens module and an electronic device comprising the fixing ring. An anti-dazzle film, matching with the fixing ring to completely absorb stray light, is included in the lens module.

Abstract: A spacer for fixing a distance between adjacent lenses of a lens module carries an internal shape reducing the incidence of stray reflected light. The spacer defines a through hole to allow light to pass and a prismatic protrusion is disposed on a wall of the through hole. A first inclined surface of the prismatic protrusion is connected to an end surface of spacer and to a second inclined surface of the prismatic protrusion. The second inclined surface is connected to other end surface of spacer. Acute angle ?1 is formed between the first inclined surface and end surface, and acute angle ?2 is formed between the second inclined surface and other end surface. Relationship between the acute angles are ?1>?2, and 60°??1+?2?80°. A lens module using such a spacer is also provided.

Abstract: A retaining ring for retaining lenses in a lens module carries an internal shape reducing the incidence of stray reflected light. The through hole in the retaining ring allows light to pass and a prismatic protrusion is disposed on a wall of the through hole. The protrusion has first and second inclined surfaces each at a specific angle. Acute angle ?1 is formed between the first inclined surface and end surface of ring, and acute angle ?2 is formed between the second inclined surface and other end surface of ring. Relationship between the acute angles are ?1>?2, and 60°??1+?2?80°. A lens module using such a retaining ring is also provided.

Abstract: A camera lens with complete symmetry reduces or avoids light deviation and stray light reflections in a lens group, notwithstanding manufacturing marks and defects. A lens barrel and a lens group are also disclosed. The lens barrel is a hollow structure for receiving the lens group. The lens group defining at least one recess on an outer sidewall as a manufacturing mark receives a layer of black glue to improve the integrity of shape. A lens module and an electronic device using such a camera lens is also provided.

Abstract: The disclosure provides a handwriting board and a control method thereof. The handwriting board includes: a touch structure configured to sense the handwriting touch position; a filter display structure comprising a photonic crystal layer and a filter driving circuit, the photonic crystal layer comprises a periodic defect structure of the surface and a photo-dielectric filled in the periodic defect structure, and the filter driving circuit is used for applying a voltage to the photonic crystal layer to drive a change in the state of the photo-dielectric in the periodic defect structure; and a controller configured to control the filter driving circuit to drive a change in the state of the photo-dielectric in the photonic crystal layer in the corresponding region according to the handwriting touch position so as to change the forbidden band of the photonic crystal layer in the corresponding region.

Abstract: Disclosed are a display substrate and a driving method thereof, and a display device. The display substrate includes a plurality of pixels, a data signal chip and a control unit. Each of the pixels includes a white sub-pixel; the data signal chip is for transmitting a set of data signals to the pixels, the set of data signals including data signals transmitted to the white sub-pixel; and the control unit controls the white sub-pixel to be in a dark state when the data signal chip transmits a predetermined set of data signals to the pixels. When the data signal chip transmits the predetermined set of data signals to the pixels, the display substrate controls the white sub-pixel to be in a dark state.

Abstract: A display device and a method of driving the same are provided. The display device includes a drive circuit and at least two display units, the drive circuit drives one or at least two display units to display a required image.