Light-emission driving device and light-emitting device

A light-emitting device, comprising:

• a light-emitting element;
• a reception unit configured to:
• receive a first drive signal through a signal line;
• convert the received first drive signal into a second drive signal;
• and
• output the second drive signal, wherein the output of the second drive signal is delayed by a first delay time based on the conversion of the received first drive signal into the second drive signal;
• a light-emission driving unit configured to:
• supply a light-emission current to the light-emitting element, wherein the light-emitting element is configured to emit light based on the supplied light-emission current;
• receive a third drive signal;
• and
• control the supply of the light-emission current based on the third drive signal;
• a light-emission current detection unit configured to detect the light-emission current, wherein
• the light-emission current detection unit includes a buffer circuit, and
• the buffer circuit has a second delay time that is same as the first delay time;
• a phase difference detection unit configured to:
• receive the second drive signal;
• and
• detect a phase difference between the detected light-emission current and the second drive signal;
• a delay unit configured to:
• adjust a propagation delay of the second drive signal based on the detected phase difference;
• and
• supply the adjusted second drive signal, as the third drive signal, to the light-emission driving unit;
• and
• a simulation drive unit configured to:
• generate a synchronized current based on the adjusted second drive signal, wherein the synchronized current is synchronized with the light-emission current;
• and
• supply the synchronized current to the light-emission current detection unit, wherein the light-emission current detection unit is further configured to:
• detect the supplied synchronized current;
• and
• detect the light-emission current based on the detection of the synchronized current.

A light-emission driving device, comprising:

• a reception unit configured to:
• receive a first drive signal through a signal line, wherein the first drive signal is a differential signal;
• convert the received first drive signal into a second drive signal;
• and
• output the second drive signal, wherein the output of the second drive signal is delayed by a first delay time based on the conversion of the received first drive signal into the second drive signal;
• a light-emission driving unit configured to:
• supply a light-emission current to a light-emitting element, wherein the light-emitting element emits light based on the supplied light-emission current;
• receive a third drive signal;
• and
• control the supply of the light-emission current based on the third drive signal;
• a light-emission current detection unit configured to detect the light-emission current, wherein
• the light-emission current detection unit includes a buffer circuit, and
• the buffer circuit has a second delay time that is same as the first delay time;
• a phase difference detection unit configured to:
• receive the second drive signal;
• and
• detect a phase difference between the detected light-emission current and the second drive signal;
• a delay unit configured to:
• adjust a propagation delay of the second drive signal based on the detected phase difference;
• and
• supply the adjusted second drive signal, as the third drive signal, to the light-emission driving unit.