A display apparatus, comprising: a display panel; and an optical main body; wherein the display apparatus has a first eyepiece side for viewing image on a first objective side of the display apparatus, and a second eyepiece side for viewing image on a second objective side of the display apparatus, the first eyepiece side being different from the second eyepiece side, the first objective side (OS 1) being different from the second objective side; the optical main body comprises: a first lens on a light emitting side of the display panel, the first lens being on the second eyepiece side of the display apparatus, the display panel being on the second objective side of the display apparatus; and a transflective mirror between the first eyepiece side and the first objective side of the display apparatus and between the second eyepiece side and the second objective side of the display apparatus, and the transflective mirror is configured to: reflect a first portion of light emitted from the display panel to the first eyepiece side; allow a second portion of light emitted from the display panel to transmit through the transflective mirror to the first lens, and transmit through the first lens to the second eyepiece side of the display apparatus; and allow light from the first objective side of the display apparatus to transmit through the transflective mirror to the first eyepiece side of the display apparatus. a display panel; and an optical main body; wherein the display apparatus has a first eyepiece side for viewing image on a first objective side of the display apparatus, and a second eyepiece side for viewing image on a second objective side of the display apparatus, the first eyepiece side being different from the second eyepiece side, the first objective side (OS 1) being different from the second objective side; the optical main body comprises: a first lens on a light emitting side of the display panel, the first lens being on the second eyepiece side of the display apparatus, the display panel being on the second objective side of the display apparatus; and a transflective mirror between the first eyepiece side and the first objective side of the display apparatus and between the second eyepiece side and the second objective side of the display apparatus, and the transflective mirror is configured to: reflect a first portion of light emitted from the display panel to the first eyepiece side; allow a second portion of light emitted from the display panel to transmit through the transflective mirror to the first lens, and transmit through the first lens to the second eyepiece side of the display apparatus; and allow light from the first objective side of the display apparatus to transmit through the transflective mirror to the first eyepiece side of the display apparatus. a first lens on a light emitting side of the display panel, the first lens being on the second eyepiece side of the display apparatus, the display panel being on the second objective side of the display apparatus; and a transflective mirror between the first eyepiece side and the first objective side of the display apparatus and between the second eyepiece side and the second objective side of the display apparatus, and the transflective mirror is configured to: reflect a first portion of light emitted from the display panel to the first eyepiece side; allow a second portion of light emitted from the display panel to transmit through the transflective mirror to the first lens, and transmit through the first lens to the second eyepiece side of the display apparatus; and allow light from the first objective side of the display apparatus to transmit through the transflective mirror to the first eyepiece side of the display apparatus. reflect a first portion of light emitted from the display panel to the first eyepiece side; allow a second portion of light emitted from the display panel to transmit through the transflective mirror to the first lens, and transmit through the first lens to the second eyepiece side of the display apparatus; and allow light from the first objective side of the display apparatus to transmit through the transflective mirror to the first eyepiece side of the display apparatus.