US Patent 10327435 LED insect light trap with light transmissive glue board

Insect capture is improved by providing a glue board having an adhesive coating on its front surface and forming a pattern of insect attractant UV light on that front surface. That pattern includes areas of bright UV light generated by light-emitting diodes that generate light at different wavelengths behind and visible through the glue board by flying insects, dimmer areas of light generated by said light emitting diodes that bounces off other portions of the device onto the glue board, and areas of shadow on the glue board where no or little light from said light-emitting diodes is present.