Abstract: The application discloses an OLED display device and a method for controlling the OLED display device. The OLED display device includes: a first switch element electrically connected respectively with a standby voltage terminal of the power board, and a standby voltage terminal of the main chip, and configured to control the standby voltage terminal of the power board to connect with or disconnect from the standby voltage terminal of the main chip; and a first control element electrically connected respectively with the first switch element, the power board, and the main chip, and configured to receive an AC detection signal output by the power board, and a DC detection signal output by the main chip, and to control the first switch element to turn on or cut off.

Abstract: The present invention discloses a method for preparing a low-density proppant by taking oil-based mud wastes as raw materials. The method includes following steps: S1, determining content of oils, silicon oxide, alumina and water in the oil-based mud wastes; S2, adding a viscosity modifier, a framework material and a pore-forming agent into oil-based mud wastes so as to obtain mixed slurry; S3, performing ball milling on mixed slurry to form powder, granulating and drying the powder, and forming a proppant pellet billet; S4, performing dehydrogenation pre-sintering on the pellet billet, and performing carbide reaction pre-sintering; and S5, performing final sintering in a natural gas protective atmosphere, thereby obtaining the low-density proppant that takes silicon carbide as the framework material. In the present invention, the low-density proppant is prepared by taking the oil-based mud wastes produced in a drilling process as the raw materials, thereby recycling the oil-based mud wastes.

Abstract: The application discloses an OLED display device and a method for controlling the OLED display device. The OLED display device includes: a first switch element electrically connected respectively with a standby voltage terminal of the power board, and a standby voltage terminal of the main chip, and configured to control the standby voltage terminal of the power board to connect with or disconnect from the standby voltage terminal of the main chip; and a first control element electrically connected respectively with the first switch element, the power board, and the main chip, and configured to receive an AC detection signal output by the power board, and a DC detection signal output by the main chip, and to control the first switch element to turn on or cut off.