2results about How to "Achieve brightness" patented technology

This invention provides a method for measuring the radiation of a display field, enabling the measurement of hyperspectral information of a display screen under test. Specifically, the method includes: S1: controlling the display screen under test to display a first set of images, and using the spectral measurement device to obtain the spectral power distribution of region A of the display screen under test under the corresponding image; S2: selecting two or more specific filters based on the spectral power distribution of region A obtained in step S1; S3: controlling the display screen under test to display a second set of images, sequentially inserting the filters selected in step S2 into the optical path, and the light from region B of the display screen under test being received by an area array sensor through an imaging lens and the filters; S4: calculating the spectral power distribution of each position point in region B of the display screen under test when displaying the second set of images, based on the pixel response value of the area array sensor in step S3 and the spectral power distribution of region A of the display screen under test in step S1.

The utility model relates to lighting technical field discloses a kind of separating element adjusting circuit, including thyristor dimmer, constant-current voltage source, lamp panel and DIM TO WARM circuit, the constant-current voltage source is by NPN triode Q1 and NPN triode Q2, diode D1 and diode D2, resistance R1, resistance R2, resistance R3, resistance R4 and resistance R5 constitute, the NPN triode Q1 electrically connected with low-end light source LEDW, the NPN triode Q2 electrically connected with high-end light source LEDC.The utility model in the present application, by NPN triode, diode and resistance and other separating element constitute simple circuit, cooperate with multiple cool and warm light source, utilize triode alternate conduction and resistance voltage division, current limiting, realize the brightness linear gradual change of warm light to cold light and color temperature regulation, circuit structure is simple, low in cost, and is suitable for compact luminaire.