5results about How to "Increase screen brightness" patented technology

The utility model relates to the technical field of projection, in particular to a touch projection screen. The touch projection screen comprises a screen main body, and the screen main body comprises a surface scratch-resistant layer, a Fresnel structure layer, a light absorption layer, a diffusion layer, a nano-silver touch layer and a substrate layer which are stacked in sequence; the control module comprises a wireless transmitting module, a touch control module and a power supply module; a charging interface is formed in the screen main body, and the control module is integrally arranged below the surface of the screen main body and electrically connected with the nano-silver touch layer; the touch control module receives capacitance change signals of the nano-silver touch control layer and transmits the capacitance change signals to a projector through the wireless transmitting module. According to the touch projection screen, the nano-silver touch layer and the control module are arranged on the projection screen, so that touch interaction of the projection screen is realized on the basis of projection display.

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 present invention relates to a telephoto large-aperture high-definition camera lens. The optical system of the lens consists of an aperture, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and an equivalent glass plate, which are arranged in sequence from the object side to the image side along the optical axis. The first lens is a positive meniscus lens, the second lens is a double convex positive lens, the third lens is a double concave negative lens, the fourth lens is a negative meniscus lens, and the fifth lens is a positive meniscus lens. The lens has a simple structure and is easy to assemble, and is more suitable for large-scale high-yield production; the focal length is longer, the surface design is good, the distortion is lower, and the image quality is excellent; the aperture is larger, and higher resolution and picture brightness can be presented, and it is not afraid of dark light environment; the imaging size is larger, and the illumination uniformity is good, and it can be adapted to a new generation of large-target CMOS.

An optical device of a double-LCD (liquid crystal display) projector relates to the technical field of projection equipment, solves the problems of low utilization rate of light emitted by a light source, easy generation of heat, high cost and the like in the application process of the existing LCD projector, and comprises an LED (light-emitting diode), a first collecting lens, a second collecting lens, a first PBS (phosphate buffer solution) beam splitter, a first reflective mirror, a first Fresnel lens and a first LCD, a second reflective mirror, a second Fresnel lens, a second LCD, a second PBS beam splitter, a third Fresnel lens and a lens; a PBS beam splitter is added in a light path to divide circular off-axis light of a light source into two beams of linear off-axis light, so that the picture brightness is doubled; the first PBS beam splitter is arranged behind the second collecting lens, so that the size of the PBS is reduced, and the cost is reduced; after the third Fresnel lens is placed behind the second PBS beam splitter, the two LCDs can share the same imaging system, and the screen combination effect of the two LCDs is facilitated.

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.