2results about How to "Increase screen brightness" patented technology

The application discloses a display panel and a display device. The working process of a pixel circuit in the display panel comprises a first mode and a second mode. The data refresh frequency of the pixel circuit in the first mode is a first data refresh frequency F1, the data refresh frequency of the pixel circuit in the second mode is a second data refresh frequency F2, one frame refresh time of the pixel circuit comprises a pre-stage and a light-emitting stage, the time length of the light-emitting stage in the first mode is L1, the time length of the light-emitting stage in the second mode is L2, and (F1-F2) x (L1-L2) < 0. The display panel and the display device provided in the application prolong the time length of the light-emitting stage when the data refresh frequency is low, shorten the time length of the light-emitting stage when the data refresh frequency is high, and reduce the display brightness difference of the display panel under different data refresh frequencies, thereby solving the problem of uneven display brightness of the display panel.

The utility model discloses a kind of projection optical lens and projection optical system, it is related to projection lens technical field, wherein, including first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, ninth lens and emitting light chip sequentially arranged from object side to image side along optical axis, the refractive power of first lens, second lens, fifth lens, seventh lens is negative, the refractive power of remaining lens is positive;Wherein, first lens, second lens are plastic aspheric lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens and ninth lens are glass spherical lens, the aperture value F of projection optical lens is less than or equal to 2.0;The lens of utility model provides, and picture brightness is high, by different lens mutual combination and reasonable allocation refractive power, with low cost, high brightness and very good abenign performance, picture is brighter, projection effect is better.