Display module, and display method and terminal thereof

A display method of a display module, the display module comprising a display panel and a control circuit, and the method comprising:

• upon receiving a turn-off screen instruction, controlling, by the control circuit, a display region on the display panel to display a target image, wherein the target region comprises a fingerprint collection region, and the turn-off screen instruction indicates that the display panel enters a screen-off state,
• wherein the target image is a ripple-like pattern, the control circuit comprises a processing subcircuit and an integrated circuit (IC), and the controlling, by the control circuit, a display region on the display panel to display a target image comprises:
• generating, by the processing subcircuit, a control signal according to the target image, and sending the control signal to the IC;
• and periodically lighting, by the IC, n columns of specified pixels in the target region according to a first brightness value, such that the ripples in the ripple-like pattern are scroll displayed according to the rules, n≥1, n being a positive integer;
• or
• wherein the target image comprises a plurality of sequentially arranged pictures, and the controlling, by the control circuit, a display region on the display panel to display a target image comprises:
• controlling, by the control circuit, the target region on the display panel to cyclically display the plurality of sequentially arranged pictures.

A terminal, comprising an optical fingerprint sensor and a display module;

• wherein the display module comprises:
• a display panel and a control circuit;
• wherein the control circuit is configured to control a target region on the display panel to display a target image when the display panel is in an off-screen state, the target region comprising a fingerprint collection region;
• the display module further comprises a protective film layer, the optical fingerprint sensor is arranged in an aperture of the protective film layer, the optical fingerprint sensor is electrically connected to the processing subcircuit of the display module, and a front projection of the aperture on the display panel coincides with the fingerprint collection region;
• the optical fingerprint sensor is configured to detect an optical signal reflected by a pattern of the fingerprint, and generate a current signal according to the optical signal, wherein the optical signal is formed after light emitted by the target image is reflected by the pattern of the fingerprint;
• the processing subcircuit is configured to acquire the current signal;
• and
• the processing subcircuit is further configured to identify the pattern of the fingerprint according to the current signal.