JBD announces multiple MicroLED microdisplay invention patents

Shanghai Xian Yao Display Technology Co., Ltd. (JBD) has become one of the key promoters of the development of Micro LED micro-display technology. Up to now, JBD has provided Micro LED micro-display solutions for more than 26 models of AR glasses, with a total shipment of hundreds of thousands of sets of glasses, and more than 30 models of AR glasses under development. In terms of production capacity, relying on the production capacity of the Hefei factory, JBD currently supports the shipment of micro-displays for millions of sets of glasses, and is expected to expand to the scale of micro-displays required for tens of millions of sets of glasses in 3-5 years.

Recently, JBD has published a number of invention patents, involving Micro LED micro-display panel manufacturing, optical projection modules, Micro LED pixel defect detection, etc.

The patent is for a micro light-emitting diode (LED) structure, including a mesa structure. The mesa structure further includes a first semiconductor layer having a first conductivity type, a light emitting layer formed on the first semiconductor layer, and a second semiconductor layer formed on the light emitting layer, the second semiconductor layer having a second conductivity type different from the first conductivity type. The top surface area of the second semiconductor layer is greater than each of: the bottom surface area of the first semiconductor layer, the top surface area of the first semiconductor layer, and the bottom surface area of the second semiconductor layer. the second semiconductor layerIt further includes a semiconductor region and an ion implantation region formed around the semiconductor region, and the resistance of the ion implantation region is higher than the resistance of the semiconductor region.

The patent is for a micro-LED that includes: a first type semiconductor layer; and a light-emitting layer formed on the first type semiconductor layer; wherein the first type semiconductor layer includes a mesa structure, a trench, and an ion implantation fence separated from the mesa structure by the trench, wherein the ion implantation fence is formed around the trench, and the trench is formed around the mesa structure; and the resistance of the ion implantation fence is higher than the resistance of the mesa structure.

This patent relates to an optical projection module and wearable electronic device. Wherein, the optical projection module includes: an optical lens, having a light input end and a light output end; a display panel corresponding to the light input end, including a light-emitting surface, the normal direction of the light-emitting surface is not parallel to the optical axis direction of the optical lens; an optical path steering element is used to obtain an initial light signal emitted from the light-emitting surface, and after steering the initial light signal, a steering light signal propagates toward the light output end. By reducing the overall size of the optical projection module, the wearing comfort and lightweight of wearable electronic devices are improved.


Preset partial pattern groups and target micro LED array patternsDecomposition method, and pixel defect detection method

The patent publication number is CN118613705A. The patent provides a method of presetting a partial pattern group and forming a preset partial pattern group. Among the multiple preset patterns included in the preset pattern group, the pixels to be turned on in each preset pattern are separated from each other by at least one pixel in the row direction and/or column direction. Multiple preset partial patterns are stacked together to form a target pixel array pattern.

The patent is a micro-LED display device, which includes: at least one single-chip micro-LED projector (1601) formed to individually generate monochromatic images of the same color or different colors; an optical waveguide (1602) formed to generate from the single-chip micro-LED projector (1602) 601) respectively receive the monochromatic image, transmit the monochromatic image, and overlay the monochromatic image into a target image; wherein the single-chip micro-LED projector (1601) includes a micro-LED array, using micro-LEDs to represent pixels; the main light angles of some micro-LEDs are different.

Micro LED projector

Micro LED projector, patent publication number: CN118613856A. This patent discloses a micro LED projector, which includes: micro LED panels (201, 202, 203, 15) and a collimator unit (14). The micro LED structure in the micro LED panel (201, 202, 203, 15) includes a mesa structure and a micro lens (11). The micro lens is formed above the micro mesa structure, the p-type semiconductor layer (01), the n-type semiconductor layer (03), and the light-emitting layer (02) formed between the p-type semiconductor layer (01) and the n-type semiconductor layer (03). The center of the microlens (11) is located on a straight line connecting the center of the luminescent layer (02) and the center of the collimator unit (14). The present disclosure reduces the size and weight of micro-LED projectors.

The patent discloses a pixel driver controller (200) including: a reference current source (205) configured to supply a reference current; a current mirror source (210) configured to provide a mirror current; a first current switch (212) coupled to the current mirror source (210) to receive the mirror current; a pixel display data memory (225) configured to store pixel display data and coupled to the first current switch (212); a second current switch (214) coupled to the thirda current switch (212); and a controller (215) coupled to the second current switch (214) and configured to control the conductive state of the second current switch (214).