40results about How to "Reduce detection bias" patented technology

A display apparatus provides an improved control accuracy of the brightness and the chromaticity. The liquid crystal display apparatus has a liquid crystal panel and a backlight unit for applying diffused light to the liquid crystal panel in a form of a sheet. The backlight unit has a light source, a light guide plate for converting light emitted from the light source into a sheetlike beam of light, an optical sheet for converting light emitted from the light guide plate into condensed light or diffused light, and an optical sensor unit for detecting a portion of light from the light guide plate and converting the detected light into an electric signal. The backlight unit also has a case housing the light source, the light guide plate, the optical sheet, and the optical sensor unit. The optical sensor unit is fixed to an area that is inside of the light guide plate and exerts no influence on display.

There is provided an optical disc recording / reproducing apparatus which can reduce the chip size using the high-miniaturization process and can enhance the detection accuracy. A signal which is obtained by amplitude-adjusting a header region in a reproduced signal detected by an optical pickup (1) is digitized, and peak detection or bottom detection from the reproduced signal in each of a first section and a second section in the header region is performed by detection circuits (9) to (12), respectively. Then, amplitude data in the first section and the second section are obtained by subtracters (13) and (14) from the detected values in the respective detection circuits. A difference in amplitude between the first section and the second section in the header region is obtained by a subtracter (15) based on the amplitude data, and the amplitude difference is outputted as an off-track error signal. The respective detection circuits (9) to (12) perform detection operations in the first and second sections, and hold the detection operations in the sections other than the first and second sections.

The invention provides a refrigerant leakage detecting method and system and an air conditioner. The method includes the steps that the first indoor air inlet temperature of an inlet of an indoor heat exchanger of the air conditioner and the first indoor heat exchanger temperature of the indoor heat exchanger are detected after a compressor of the air conditioner runs for a first set period of time; when the first difference between the first indoor air inlet temperature and the first indoor heat exchanger temperature is smaller than or equal to a first preset threshold, the second indoor air inlet temperature of the inlet of the indoor heat exchanger and the second indoor heat exchanger temperature of the indoor heat exchanger are detected after the compressor runs for a second preset period of time; when the second difference between the second indoor air inlet temperature and the second indoor heat exchanger temperature is smaller than or equal to the first preset threshold, whether variation of the second difference relative to the first difference is smaller than or equal to a second preset threshold or not is judged, and if yes, refrigerant leakage is judged to happen to the air conditioner. According to the technical scheme, refrigerant leakage of the air conditioner can be accurately detected in time.

The invention discloses a reagent kit and a method for accurately and quantitatively detecting type-II norovirus, and particularly relates to a group of primers and probes for detecting type-II norovirus, a reagent kit with the primers and the probes and a method implemented by the aid of the reagent kit. The primers and the probes are provided with nucleotide sequences shown from SEQ ID No.1 to SEQ ID No.3 in a sequence table. The reagent kit and the method have the advantages that the method can be used for accurately and quantitatively detecting the type-II norovirus by the aid of microdroplet digital PCR (polymerase chain reaction) technologies and is high in sensitivity, accuracy and repeatability and easy to standardize.