Kunshan Go-visionox Opto-electronics Co., Ltd.

Nanjing Institute of Astronomical Optics & Technology, National Astronomical Observatories, Cas

Yi Zheng

Bin Liang

Ying Li

Tianchun Zheng

Zhaoxiang Wu

Kai Wei

Lifeng Tang

Yanqing Wang

Junhui Zeng

Changpeng Ding

The invention discloses a method for correcting the pointing errors of a biaxial rotation system based on the spherical cap function, comprising: error collection: selecting stars or radio sources distributed evenly in a star catalogue for tracking and observation to obtain the theoretical position and measurement position of the stars, and subtracting the measurement positions and the theoretical positions to obtain the error distribution; error model fitting: selecting a suitable orthogonal spherical cap function for the obtained error distribution and performing fitting to calculate an error fitting coefficient, the orthogonal spherical cap function model comprising a hemispheric harmonic function HSH, a Zernike spherical cap function ZSF, and a longitudinal spherical cap function LSF; and error control and compensation: putting the error model and the related fitting coefficient into a pointing control system for compensation. In the present method for correcting the pointing errors of a biaxial rotation system based on a spherical cap function, the model has strong stability and is not easily affected by measurement noise; there is no need to determine the form of the model on the bases of the frame form of the telescope, and the correction accuracy is high.

Method for correcting pointing errors of biaxial rotation system based on spherical cap function

The present disclosure relates to a display panel and a display device. The display panel includes a display module, at least one color layer, and a light absorption layer. The display module has a display face and a non-display face opposite to the display face. The at least one color layer is disposed at a side of the display module away from the display face. The light absorption layer disposed at a side of the at least one color layer away from the display module. A first through hole is defined in the light absorption layer. A second through hole is defined in the at least one color layer. The second through hole is located corresponding to and in communication with the first through hole. The first through hole and the second through hole are located corresponding to an external functional module.

Display panels and display devices

The invention discloses a method for rendering on the basis of hemispherical orthogonal function, the method comprising the following steps: selecting rendering fragments and establishing a local coordinate system; acquiring a bidirectional reflectance distribution function of a material; if global illumination is an orthogonal function, determining a rotation matrix of an orthogonal function coefficient according to the rotation angles of the global coordinate system and the local coordinate system, and calculating a local orthogonal function illumination coefficient; converting the local orthogonal function illumination coefficient into a hemispherical orthogonal function illumination coefficient; sampling to obtain the spatial distribution of a bidirectional reflection distribution function of a rendered material; obtaining a hemispherical orthogonal function of the bidirectional reflection distribution function of the rendered material; and using the dot product of a hemispherical orthogonal function coefficient of illumination and a hemispherical orthogonal function coefficient of the bidirectional reflection distribution function of the rendered material and accumulating to obtain the light intensity in the reflection direction. A hemispherical harmonic function(HSH) is used to fit measurement data or theoretically derived data of a BRDF, which may avoid the difficulty of fitting that accurs for a hemispherical harmonics function due to data being missing in the lower hemisphere.

Method for rendering on basis of hemispherical orthogonal function

Disclosed in the present disclosure are a picture compensation method and a display apparatus, the picture compensation method, including: obtaining a ratio of non-luminous pixels in an Nth scanning line to all pixels in the Nth scanning line; for each non-luminous pixel in the Nth scanning line, receiving or presetting a first data voltage; obtaining a second data voltage received or preset by a pixel in at least one of an N&#x2212;1th scanning line and an N+1th scanning line located in a same column with the non-luminous pixel; in response to a transition relationship between the first data voltage and the second data voltage existing, obtaining a voltage value to be compensated for luminous pixels in the Nth scanning line based on the transition relationship and the ratio; and displaying a picture after compensating the voltage value of the luminous pixels in the Nth scanning line of pixels.

Picture compensation method and display device

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Jiangsu, China

Yi Zheng