Oled display apparatus, preparation method thereof, and display terminal

A display terminal, comprising an OLED display apparatus,

• wherein the OLED display apparatus has a head area and a tail area, and the OLED display apparatus comprises a middle frame and an OLED screen,
• wherein the middle frame comprises a bottom plate and a side plate located on a side of the bottom plate;
• the OLED screen comprises a super clean foam, a display layer, and a packaging cover plate that are disposed in a stacked manner;
• the super clean foam is adhered to the bottom plate by using an adhesive;
• the packaging cover plate extends beyond the display layer along an extending direction of the OLED screen;
• the OLED screen is provided with a side sealant at least in a portion corresponding to the head area, and the side sealant is adhered to a side end surface of the super clean foam, a side end surface of the display layer, and a side surface that is of the packaging cover plate and that faces the bottom plate;
• and the OLED screen is adhered to the middle frame by using a seam sealant outside the head area;
• and
• the OLED display apparatus has two corners in the head area, a transition connecting adhesive is disposed between the middle frame and the OLED screen at a location corresponding to each of the corners, and the transition connecting adhesive connects the side sealant and the seam sealant.

A preparation method for an OLED display apparatus, comprising:

• applying a side sealant to at least a side end surface that is of an OLED screen and that is located in a head area, so that the side sealant is adhered to a side end surface of a super clean foam, a side end surface of a display layer, and a side surface that is of a portion in which a packaging cover plate exceeds beyond the display layer and that faces a bottom plate, to seal the side end surface of the OLED screen, wherein the super clean foam, the display layer, and the packaging cover plate are disposed in the OLED screen in a stacked manner;
• applying an adhesive to the super clean foam in the OLED screen or the bottom plate in a middle frame, so that the OLED screen is adhered to the bottom plate in the middle frame by using the adhesive;
• and
• connecting the middle frame and the OLED screen by using a seam sealant and a transition connecting adhesive, so that a side plate in the middle frame is adhered to the OLED screen by using the seam sealant outside the head area, the transition connecting adhesive is disposed between the middle frame and the OLED screen in a portion corresponding to each corner in the head area, and the transition connecting adhesive connects the side sealant and the seam sealant.