Abstract: A modified cutinase is disclosed. The cutinase has the modified amino acid sequence of SEQ ID NO: 2, wherein the modification is a substitution of asparagine at position 181 with alanine, or substitutions of asparagine at position 181 with alanine and phenylalanine at position 235 with leucine. The modified enzyme has improved PET-hydrolytic activity, and thus, the high-activity PET hydrolase is obtained, and the industrial application value of the PET hydrolase is enhanced.

Abstract: A display driving integrated circuit (IC) and a driving parameter adjustment method thereof are provided. The display driving IC includes a control circuit and a driving parameter determination circuit. The control circuit controls a current driving circuit and a scanning circuit according to a driving parameter, wherein the current driving circuit is suitable for driving multiple driving lines of a light emitting diode (LED) array, and the scanning circuit is suitable for driving multiple scanning lines of the LED array. The driving parameter determination circuit is coupled to the control circuit to provide the driving parameter. The driving parameter determination circuit dynamically adjusts the driving parameter for a target LED in the LED array according to a grayscale value of the target LED.

Abstract: A device includes: a complementary transistor including: a first transistor having a first source/drain region and a second source/drain region; and a second transistor stacked on the first transistor, and having a third source/drain region and a fourth source/drain region, the third source/drain region overlapping the first source/drain region, the fourth source/drain region overlapping the second source/drain region. The device further includes: a first source/drain contact electrically coupled to the third source/drain region; a second source/drain contact electrically coupled to the second source/drain region; a gate isolation structure adjacent the first and second transistors; and an interconnect structure electrically coupled to the first source/drain contact and the second source/drain contact.

Abstract: An ocular optical system configured to allow imaging rays from a display image to enter an observer’s eye through the ocular optical system so as to form an image is provided. A direction toward the eye is an eye side, and a direction toward the display image is a display side. The ocular optical system sequentially includes a first and a second lens elements having refracting power from the eye side to the display side along an optical axis. Each lens element includes an eye-side surface and a display-side surface. An optical axis region of the eye-side surface of the first lens element is concave. An optical axis region of the eye-side surface of the second lens element is concave.

Abstract: An optical imaging lens includes a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has positive refracting power, an optical-axis region of the object-side surface of the second lens element is convex, a periphery region of the object-side surface of the second lens element is convex, and an optical-axis region of the image-side surface of the second lens element is convex. The Abbe number of the first lens element is ?1, the Abbe number of the second lens element is ?2 and the Abbe number of the third lens element is ?3 to satisfy 61.119??1+?2+?3?96.733.

Abstract: An ocular optical system configured to allow imaging rays from a display image to enter an observer's eye through the ocular optical system so as to form an image is provided. A direction toward the eye is an eye side, and a direction toward the display image is a display side. The ocular optical system sequentially includes a first and a second lens elements having refracting power from the eye side to the display side along an optical axis. Each lens element includes an eye-side surface and a display-side surface. An optical axis region of the eye-side surface of the first lens element is concave. An optical axis region of the eye-side surface of the second lens element is concave.

Abstract: An ocular optical system configured to allow imaging rays from a display image to enter an observer's eye through the ocular optical system so as to form an image is provided. A direction toward the eye is an eye side, and a direction toward the display image is a display side. The ocular optical system sequentially includes a first and a second lens elements having refracting power from the eye side to the display side along an optical axis. Each lens element includes an eye-side surface and a display-side surface. An optical axis region of the eye-side surface of the first lens element is concave. An optical axis region of the eye-side surface of the second lens element is concave.

Abstract: An ocular optical system configured to allow imaging rays from a display image to enter an observer's eye through the ocular optical system so as to form an image is provided. A direction toward the eye is an eye side, and a direction toward the display image is a display side. The ocular optical system sequentially includes a first and a second lens elements having refracting power from the eye side to the display side along an optical axis. Each lens element includes an eye-side surface and a display-side surface. An optical axis region of a display-side surface of the first lens element is convex. The display-side surface of the first lens element is a Fresnel surface. An optical axis region or a periphery region of a display-side surface of the second lens element is convex.

Abstract: An optical imaging lens includes a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has positive refracting power, an optical-axis region of the object-side surface of the second lens element is convex, a periphery region of the object-side surface of the second lens element is convex, and an optical-axis region of the image-side surface of the second lens element is convex. The Abbe number of the first lens element is ?1, the Abbe number of the second lens element is ?2 and the Abbe number of the third lens element is ?3 to satisfy 61.119??1+?2+?3?96.733.

Abstract: An optical imaging lens includes a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has positive refracting power, an optical-axis region of the object-side surface of the second lens element is convex, a periphery region of the object-side surface of the second lens element is convex, and an optical-axis region of the image-side surface of the second lens element is convex. The Abbe number of the first lens element is ?1, the Abbe number of the second lens element is ?2 and the Abbe number of the third lens element is ?3 to satisfy 61.119??1+?2+?3?96.733.

Abstract: An ocular optical system configured to allow imaging rays from a display frame to enter an observer's eye through the ocular optical system to form an image is provided. The ocular optical system includes a lens element having an eye-side surface and a display-side surface. The lens element has an optical axis extending from a display side toward an eye side. The display-side surface of the lens element adopts a Fresnel lens design. The ocular optical system satisfies: 4.317?EFL/T1?12.463, where EFL represents an effective focal length of the ocular optical system, and T1 represents a thickness of the lens element on the optical axis.

Abstract: An ocular optical system configured to allow imaging rays from a display frame to enter an observer's eye through the ocular optical system to form an image is provided. The ocular optical system includes a lens element having an eye-side surface and a display-side surface. The lens element has an optical axis extending from a display side toward an eye side. The display-side surface of the lens element adopts a Fresnel lens design. The ocular optical system satisfies: 4.317?EFL/T1?12.463, where EFL represents an effective focal length of the ocular optical system, and T1 represents a thickness of the lens element on the optical axis.

Abstract: An ocular optical system configured to allow imaging rays from a display frame to enter an observer's eye through the ocular optical system to form an image is provided. The ocular optical system includes a lens element having an eye-side surface and a display-side surface. The lens element has an optical axis extending from a display side toward an eye side. The display-side surface of the lens element adopts a Fresnel lens design. The display-side has a plurality of effective sub-surfaces and a plurality of ineffective sub-surfaces. The effective sub-surfaces are configured to allow the image rays to form an image. Each ineffective sub-surface connects two adjacent effective sub-surfaces. The ocular optical system satisfies: 25.000°???52.000°, where ? represents a maximum tilting angle of the effective sub-surfaces relative to a reference plane perpendicular to the optical axis.

Abstract: An optical imaging lens includes a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element has positive refracting power, an optical-axis region of the object-side surface of the second lens element is convex, a periphery region of the object-side surface of the second lens element is convex, and an optical-axis region of the image-side surface of the second lens element is convex. The Abbe number of the first lens element is ?1, the Abbe number of the second lens element is ?2 and the Abbe number of the third lens element is ?3 to satisfy 61.119??1+?2+?3?96.733.

Abstract: An optical imaging lens includes a first lens element, a second lens element, a third lens element and a fourth lens element. The optical-axis region of the image-side surface of the first lens element is concave, the periphery region of the image-side surface of the second lens element is convex, a third lens has positive refracting power and the optical-axis region of the object-side surface of the fourth lens element is convex. The Abbe number of the first lens element is ?1, the Abbe number of the second lens element is ?2, the Abbe number of the third lens element is ?3 and the Abbe number of the fourth lens element is ?4 to satisfy ?2?30.000 and ?1+?3+?4?120.000.

Abstract: An optical imaging lens includes a first lens element, a second lens element, a third lens element and a fourth lens element. The optical-axis region of the image-side surface of the first lens element is concave, the periphery region of the image-side surface of the second lens element is convex, a third lens has positive refracting power and the optical-axis region of the object-side surface of the fourth lens element is convex. The Abbe number of the first lens element is ?1, the Abbe number of the second lens element is ?2, the Abbe number of the third lens element is ?3 and the Abbe number of the fourth lens element is ?4 to satisfy ?2?30.000 and ?1+?3+?4?120.000.

Abstract: An ocular optical system configured to allow imaging rays from a display frame to enter an observer's eye through the ocular optical system to form an image is provided. The ocular optical system includes a lens element having an eye-side surface and a display-side surface. The lens element has an optical axis extending from a display side toward an eye side. The display-side surface of the lens element adopts a Fresnel lens design. The display-side has a plurality of effective sub-surfaces and a plurality of ineffective sub-surfaces. The effective sub-surfaces are configured to allow the image rays to form an image. Each ineffective sub-surface connects two adjacent effective sub-surfaces. The ocular optical system satisfies: 25.000°???52.000°, where ? represents a maximum tilting angle of the effective sub-surfaces relative to a reference plane perpendicular to the optical axis.

Abstract: An ocular optical system configured to allow imaging rays from a display frame to enter an observer's eye through the ocular optical system to form an image is provided. The ocular optical system includes a lens element having an eye-side surface and a display-side surface. The lens element has an optical axis extending from a display side toward an eye side. The display-side surface of the lens element adopts a Fresnel lens design. The display-side has a plurality of effective sub-surfaces and a plurality of ineffective sub-surfaces. The effective sub-surfaces are configured to allow the image rays to form an image. Each ineffective sub-surface connects two adjacent effective sub-surfaces. The ocular optical system satisfies: 1.500?R1/SagI?4.000, where SagI is a total of lengths of orthogonal projections of the effective sub-surfaces respectively projected onto the optical axis, and R1 is a half of a clear aperture of the display-side surface.

Abstract: Provided is a Fresnel lens including a lens body, a planar surface on one side of the lens body, and a Fresnel surface located on another side of the lens body opposite to the planar surface, wherein the Fresnel surface includes alternating effective portions and non-effective portions, and the non-effective portions have non-smooth microstructures.

Abstract: A wide-angle lens is applicable to a head-mounted display having a display screen. The wide-angle lens includes a first lens having a positive refractive power and a second lens having a positive refractive power. Light emitted by the display screen passes to a user through the second lens and the first lens sequentially. The wide-angle lens satisfies the following conditions: - 0.65 < f f 1 - f f 2 < 0.60 ? ? and ? ? 0.2 < f 1 f 2 < 3.8 , where f1 and f2 are the focal lengths of the first lens and the second lens, respectively, and f is the focal length of the wide-angle lens. The wide-angle lens has a greater view angle and achieves better parallax correction.