diff --git a/homeassistant/components/epson/media_player.py b/homeassistant/components/epson/media_player.py
index 1f80be9fe06..1f401ed0a7d 100644
--- a/homeassistant/components/epson/media_player.py
+++ b/homeassistant/components/epson/media_player.py
@@ -37,7 +37,10 @@ from homeassistant.config_entries import ConfigEntry
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import entity_platform
 import homeassistant.helpers.config_validation as cv
-from homeassistant.helpers.device_registry import DeviceInfo
+from homeassistant.helpers.device_registry import (
+    DeviceInfo,
+    async_get as async_get_device_registry,
+)
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.entity_registry import async_get as async_get_entity_registry
 
@@ -55,8 +58,7 @@ async def async_setup_entry(
     projector: Projector = hass.data[DOMAIN][config_entry.entry_id]
     projector_entity = EpsonProjectorMediaPlayer(
         projector=projector,
-        name=config_entry.title,
-        unique_id=config_entry.unique_id,
+        unique_id=config_entry.unique_id or config_entry.entry_id,
         entry=config_entry,
     )
     async_add_entities([projector_entity], True)
@@ -71,6 +73,9 @@ async def async_setup_entry(
 class EpsonProjectorMediaPlayer(MediaPlayerEntity):
     """Representation of Epson Projector Device."""
 
+    _attr_has_entity_name = True
+    _attr_name = None
+
     _attr_supported_features = (
         MediaPlayerEntityFeature.TURN_ON
         | MediaPlayerEntityFeature.TURN_OFF
@@ -82,38 +87,38 @@ class EpsonProjectorMediaPlayer(MediaPlayerEntity):
     )
 
     def __init__(
-        self, projector: Projector, name: str, unique_id: str | None, entry: ConfigEntry
+        self, projector: Projector, unique_id: str, entry: ConfigEntry
     ) -> None:
         """Initialize entity to control Epson projector."""
         self._projector = projector
         self._entry = entry
-        self._attr_name = name
         self._attr_available = False
         self._cmode = None
         self._attr_source_list = list(DEFAULT_SOURCES.values())
         self._attr_unique_id = unique_id
-        if unique_id:
-            self._attr_device_info = DeviceInfo(
-                identifiers={(DOMAIN, unique_id)},
-                manufacturer="Epson",
-                model="Epson",
-                name="Epson projector",
-                via_device=(DOMAIN, unique_id),
-            )
+        self._attr_device_info = DeviceInfo(
+            identifiers={(DOMAIN, unique_id)},
+            manufacturer="Epson",
+            model="Epson",
+        )
 
     async def set_unique_id(self) -> bool:
         """Set unique id for projector config entry."""
         _LOGGER.debug("Setting unique_id for projector")
-        if self.unique_id:
+        if self._entry.unique_id:
             return False
         if uid := await self._projector.get_serial_number():
             self.hass.config_entries.async_update_entry(self._entry, unique_id=uid)
-            registry = async_get_entity_registry(self.hass)
-            old_entity_id = registry.async_get_entity_id(
+            ent_reg = async_get_entity_registry(self.hass)
+            old_entity_id = ent_reg.async_get_entity_id(
                 "media_player", DOMAIN, self._entry.entry_id
             )
             if old_entity_id is not None:
-                registry.async_update_entity(old_entity_id, new_unique_id=uid)
+                ent_reg.async_update_entity(old_entity_id, new_unique_id=uid)
+            dev_reg = async_get_device_registry(self.hass)
+            device = dev_reg.async_get_device({(DOMAIN, self._entry.entry_id)})
+            if device is not None:
+                dev_reg.async_update_device(device.id, new_identifiers={(DOMAIN, uid)})
             self.hass.async_create_task(
                 self.hass.config_entries.async_reload(self._entry.entry_id)
             )
diff --git a/tests/components/epson/test_media_player.py b/tests/components/epson/test_media_player.py
new file mode 100644
index 00000000000..d44036c680c
--- /dev/null
+++ b/tests/components/epson/test_media_player.py
@@ -0,0 +1,49 @@
+"""Tests for the epson integration."""
+from datetime import timedelta
+from unittest.mock import patch
+
+from freezegun.api import FrozenDateTimeFactory
+
+from homeassistant.components.epson.const import DOMAIN
+from homeassistant.const import CONF_HOST
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import device_registry as dr, entity_registry as er
+
+from tests.common import MockConfigEntry, async_fire_time_changed
+
+
+async def test_set_unique_id(
+    hass: HomeAssistant,
+    entity_registry: er.EntityRegistry,
+    device_registry: dr.DeviceRegistry,
+    freezer: FrozenDateTimeFactory,
+):
+    """Test the unique id is set on runtime."""
+    entry = MockConfigEntry(
+        domain=DOMAIN,
+        title="Epson",
+        data={CONF_HOST: "1.1.1.1"},
+        entry_id="1cb78c095906279574a0442a1f0003ef",
+    )
+    entry.add_to_hass(hass)
+    with patch("homeassistant.components.epson.Projector.get_power"):
+        await hass.config_entries.async_setup(entry.entry_id)
+        await hass.async_block_till_done()
+        assert entry.unique_id is None
+        entity = entity_registry.async_get("media_player.epson")
+        assert entity
+        assert entity.unique_id == entry.entry_id
+    with patch(
+        "homeassistant.components.epson.Projector.get_power", return_value="01"
+    ), patch(
+        "homeassistant.components.epson.Projector.get_serial_number", return_value="123"
+    ), patch(
+        "homeassistant.components.epson.Projector.get_property"
+    ):
+        freezer.tick(timedelta(seconds=30))
+        async_fire_time_changed(hass)
+        await hass.async_block_till_done()
+        entity = entity_registry.async_get("media_player.epson")
+        assert entity
+        assert entity.unique_id == "123"
+        assert entry.unique_id == "123"