diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml
index 8cb7278270099..5aff0e0cf38a1 100644
--- a/core/res/res/values/config.xml
+++ b/core/res/res/values/config.xml
@@ -1388,6 +1388,12 @@
     <integer name="config_screenBrightnessDim">10</integer>
     <item name="config_screenBrightnessDimFloat" format="float" type="dimen">0.05</item>
 
+    <!-- If the screen brightness is already set at or below config_screenBrightnessDim, and the
+         user activity timeout expires, we still want to dim the screen slightly to indicate that
+         the device is about to go to sleep. The screen will dim by this amount in that case.
+         -->
+    <item name="config_screenBrightnessMinimumDimAmountFloat" format="float" type="dimen">0.04</item>
+
     <!-- Minimum allowable screen brightness to use in a very dark room.
          This value sets the floor for the darkest possible auto-brightness
          adjustment.  It is expected to be somewhat less than the first entry in
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index 9bb92e6c93cc2..6797eaffe1343 100644
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -2040,6 +2040,7 @@
   <java-symbol type="dimen" name="config_screenBrightnessSettingDefaultFloat" />
   <java-symbol type="dimen" name="config_screenBrightnessDozeFloat" />
   <java-symbol type="dimen" name="config_screenBrightnessDimFloat" />
+  <java-symbol type="dimen" name="config_screenBrightnessMinimumDimAmountFloat" />
   <java-symbol type="integer" name="config_screenBrightnessDark" />
   <java-symbol type="integer" name="config_screenBrightnessDim" />
   <java-symbol type="integer" name="config_screenBrightnessDoze" />
diff --git a/packages/SystemUI/src/com/android/systemui/doze/DozeScreenBrightness.java b/packages/SystemUI/src/com/android/systemui/doze/DozeScreenBrightness.java
index 765c24507662d..d27c39a893190 100644
--- a/packages/SystemUI/src/com/android/systemui/doze/DozeScreenBrightness.java
+++ b/packages/SystemUI/src/com/android/systemui/doze/DozeScreenBrightness.java
@@ -16,6 +16,10 @@
 
 package com.android.systemui.doze;
 
+import static android.os.PowerManager.GO_TO_SLEEP_REASON_TIMEOUT;
+
+import static com.android.systemui.keyguard.WakefulnessLifecycle.WAKEFULNESS_GOING_TO_SLEEP;
+
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
@@ -31,11 +35,13 @@ import android.os.UserHandle;
 import android.provider.Settings;
 import android.util.IndentingPrintWriter;
 
+import com.android.internal.R;
 import com.android.systemui.doze.dagger.BrightnessSensor;
 import com.android.systemui.doze.dagger.DozeScope;
 import com.android.systemui.doze.dagger.WrappedService;
 import com.android.systemui.keyguard.WakefulnessLifecycle;
 import com.android.systemui.statusbar.phone.DozeParameters;
+import com.android.systemui.statusbar.phone.UnlockedScreenOffAnimationController;
 import com.android.systemui.statusbar.policy.DevicePostureController;
 import com.android.systemui.util.sensors.AsyncSensorManager;
 
@@ -57,6 +63,12 @@ public class DozeScreenBrightness extends BroadcastReceiver implements DozeMachi
             "com.android.systemui.doze.AOD_BRIGHTNESS";
     protected static final String BRIGHTNESS_BUCKET = "brightness_bucket";
 
+    /**
+     * Just before the screen times out from user inactivity, DisplayPowerController dims the screen
+     * brightness to the lower of {@link #mScreenBrightnessDim}, or the current brightness minus
+     * this amount.
+     */
+    private final float mScreenBrightnessMinimumDimAmountFloat;
     private final Context mContext;
     private final DozeMachine.Service mDozeService;
     private final DozeHost mDozeHost;
@@ -87,6 +99,8 @@ public class DozeScreenBrightness extends BroadcastReceiver implements DozeMachi
      */
     private int mDebugBrightnessBucket = -1;
 
+    private UnlockedScreenOffAnimationController mUnlockedScreenOffAnimationController;
+
     @Inject
     public DozeScreenBrightness(
             Context context,
@@ -98,8 +112,8 @@ public class DozeScreenBrightness extends BroadcastReceiver implements DozeMachi
             WakefulnessLifecycle wakefulnessLifecycle,
             DozeParameters dozeParameters,
             DevicePostureController devicePostureController,
-            DozeLog dozeLog
-    ) {
+            DozeLog dozeLog,
+            UnlockedScreenOffAnimationController unlockedScreenOffAnimationController) {
         mContext = context;
         mDozeService = service;
         mSensorManager = sensorManager;
@@ -111,6 +125,10 @@ public class DozeScreenBrightness extends BroadcastReceiver implements DozeMachi
         mDozeHost = host;
         mHandler = handler;
         mDozeLog = dozeLog;
+        mUnlockedScreenOffAnimationController = unlockedScreenOffAnimationController;
+
+        mScreenBrightnessMinimumDimAmountFloat = context.getResources().getFloat(
+                R.dimen.config_screenBrightnessMinimumDimAmountFloat);
 
         mDefaultDozeBrightness = alwaysOnDisplayPolicy.defaultDozeBrightness;
         mScreenBrightnessDim = alwaysOnDisplayPolicy.dimBrightness;
@@ -163,14 +181,15 @@ public class DozeScreenBrightness extends BroadcastReceiver implements DozeMachi
         }
     }
 
-    private void updateBrightnessAndReady(boolean force) {
+    public void updateBrightnessAndReady(boolean force) {
         if (force || mRegistered || mDebugBrightnessBucket != -1) {
             int sensorValue = mDebugBrightnessBucket == -1
                     ? mLastSensorValue : mDebugBrightnessBucket;
             int brightness = computeBrightness(sensorValue);
             boolean brightnessReady = brightness > 0;
             if (brightnessReady) {
-                mDozeService.setDozeScreenBrightness(clampToUserSetting(brightness));
+                mDozeService.setDozeScreenBrightness(
+                        clampToDimBrightnessForScreenOff(clampToUserSetting(brightness)));
             }
 
             int scrimOpacity = -1;
@@ -243,13 +262,24 @@ public class DozeScreenBrightness extends BroadcastReceiver implements DozeMachi
     /**
      * Clamp the brightness to the dim brightness value used by PowerManagerService just before the
      * device times out and goes to sleep, if we are sleeping from a timeout. This ensures that we
-     * don't raise the brightness back to the user setting before playing the screen off animation.
+     * don't raise the brightness back to the user setting before or during the screen off
+     * animation.
      */
     private int clampToDimBrightnessForScreenOff(int brightness) {
-        if (mDozeParameters.shouldControlUnlockedScreenOff()
-                && mWakefulnessLifecycle.getLastSleepReason()
-                == PowerManager.GO_TO_SLEEP_REASON_TIMEOUT) {
-            return Math.min(mScreenBrightnessDim, brightness);
+        final boolean screenTurningOff =
+                mUnlockedScreenOffAnimationController.isScreenOffAnimationPlaying()
+                        || mWakefulnessLifecycle.getWakefulness() == WAKEFULNESS_GOING_TO_SLEEP;
+        if (screenTurningOff
+                && mWakefulnessLifecycle.getLastSleepReason() == GO_TO_SLEEP_REASON_TIMEOUT) {
+            return Math.max(
+                    PowerManager.BRIGHTNESS_OFF,
+                    // Use the lower of either the dim brightness, or the current brightness reduced
+                    // by the minimum dim amount. This is the same logic used in
+                    // DisplayPowerController#updatePowerState to apply a minimum dim amount.
+                    Math.min(
+                            brightness - (int) Math.floor(
+                                    mScreenBrightnessMinimumDimAmountFloat * 255),
+                            mScreenBrightnessDim));
         } else {
             return brightness;
         }
diff --git a/packages/SystemUI/src/com/android/systemui/doze/DozeScreenState.java b/packages/SystemUI/src/com/android/systemui/doze/DozeScreenState.java
index 908397bd775c9..36319380ad50d 100644
--- a/packages/SystemUI/src/com/android/systemui/doze/DozeScreenState.java
+++ b/packages/SystemUI/src/com/android/systemui/doze/DozeScreenState.java
@@ -77,6 +77,7 @@ public class DozeScreenState implements DozeMachine.Part {
     private final Provider<UdfpsController> mUdfpsControllerProvider;
     @Nullable private UdfpsController mUdfpsController;
     private final DozeLog mDozeLog;
+    private final DozeScreenBrightness mDozeScreenBrightness;
 
     private int mPendingScreenState = Display.STATE_UNKNOWN;
     private SettableWakeLock mWakeLock;
@@ -90,7 +91,8 @@ public class DozeScreenState implements DozeMachine.Part {
             WakeLock wakeLock,
             AuthController authController,
             Provider<UdfpsController> udfpsControllerProvider,
-            DozeLog dozeLog) {
+            DozeLog dozeLog,
+            DozeScreenBrightness dozeScreenBrightness) {
         mDozeService = service;
         mHandler = handler;
         mParameters = parameters;
@@ -99,6 +101,7 @@ public class DozeScreenState implements DozeMachine.Part {
         mAuthController = authController;
         mUdfpsControllerProvider = udfpsControllerProvider;
         mDozeLog = dozeLog;
+        mDozeScreenBrightness = dozeScreenBrightness;
 
         updateUdfpsController();
         if (mUdfpsController == null) {
@@ -209,6 +212,12 @@ public class DozeScreenState implements DozeMachine.Part {
         if (screenState != Display.STATE_UNKNOWN) {
             if (DEBUG) Log.d(TAG, "setDozeScreenState(" + screenState + ")");
             mDozeService.setDozeScreenState(screenState);
+            if (screenState == Display.STATE_DOZE) {
+                // If we're entering doze, update the doze screen brightness. We might have been
+                // clamping it to the dim brightness during the screen off animation, and we should
+                // now change it to the brightness we actually want according to the sensor.
+                mDozeScreenBrightness.updateBrightnessAndReady(false /* force */);
+            }
             mPendingScreenState = Display.STATE_UNKNOWN;
             mWakeLock.setAcquired(false);
         }
diff --git a/packages/SystemUI/tests/src/com/android/systemui/doze/DozeScreenBrightnessTest.java b/packages/SystemUI/tests/src/com/android/systemui/doze/DozeScreenBrightnessTest.java
index 886f84e19e0bf..5b472ba6557b2 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/doze/DozeScreenBrightnessTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/doze/DozeScreenBrightnessTest.java
@@ -51,6 +51,7 @@ import com.android.systemui.SysuiTestCase;
 import com.android.systemui.dock.DockManager;
 import com.android.systemui.keyguard.WakefulnessLifecycle;
 import com.android.systemui.statusbar.phone.DozeParameters;
+import com.android.systemui.statusbar.phone.UnlockedScreenOffAnimationController;
 import com.android.systemui.statusbar.policy.DevicePostureController;
 import com.android.systemui.util.concurrency.FakeExecutor;
 import com.android.systemui.util.concurrency.FakeThreadFactory;
@@ -93,6 +94,8 @@ public class DozeScreenBrightnessTest extends SysuiTestCase {
     DevicePostureController mDevicePostureController;
     @Mock
     DozeLog mDozeLog;
+    @Mock
+    private UnlockedScreenOffAnimationController mUnlockedScreenOffAnimationController;
     private FakeExecutor mFakeExecutor = new FakeExecutor(new FakeSystemClock());
     private FakeThreadFactory mFakeThreadFactory = new FakeThreadFactory(mFakeExecutor);
 
@@ -130,7 +133,8 @@ public class DozeScreenBrightnessTest extends SysuiTestCase {
                 mWakefulnessLifecycle,
                 mDozeParameters,
                 mDevicePostureController,
-                mDozeLog);
+                mDozeLog,
+                mUnlockedScreenOffAnimationController);
     }
 
     @Test
@@ -236,7 +240,8 @@ public class DozeScreenBrightnessTest extends SysuiTestCase {
                 mWakefulnessLifecycle,
                 mDozeParameters,
                 mDevicePostureController,
-                mDozeLog);
+                mDozeLog,
+                mUnlockedScreenOffAnimationController);
         mScreen.transitionTo(UNINITIALIZED, INITIALIZED);
         mScreen.transitionTo(INITIALIZED, DOZE);
         reset(mDozeHost);
@@ -273,7 +278,8 @@ public class DozeScreenBrightnessTest extends SysuiTestCase {
                 mWakefulnessLifecycle,
                 mDozeParameters,
                 mDevicePostureController,
-                mDozeLog);
+                mDozeLog,
+                mUnlockedScreenOffAnimationController);
 
         mScreen.transitionTo(UNINITIALIZED, INITIALIZED);
         mScreen.transitionTo(INITIALIZED, DOZE_AOD);
@@ -304,7 +310,8 @@ public class DozeScreenBrightnessTest extends SysuiTestCase {
                 mWakefulnessLifecycle,
                 mDozeParameters,
                 mDevicePostureController,
-                mDozeLog);
+                mDozeLog,
+                mUnlockedScreenOffAnimationController);
 
         // GIVEN the device is in AOD
         mScreen.transitionTo(UNINITIALIZED, INITIALIZED);
@@ -342,7 +349,8 @@ public class DozeScreenBrightnessTest extends SysuiTestCase {
                 mWakefulnessLifecycle,
                 mDozeParameters,
                 mDevicePostureController,
-                mDozeLog);
+                mDozeLog,
+                mUnlockedScreenOffAnimationController);
 
         // GIVEN device is in AOD
         mScreen.transitionTo(UNINITIALIZED, INITIALIZED);
@@ -384,7 +392,8 @@ public class DozeScreenBrightnessTest extends SysuiTestCase {
                 mWakefulnessLifecycle,
                 mDozeParameters,
                 mDevicePostureController,
-                mDozeLog);
+                mDozeLog,
+                mUnlockedScreenOffAnimationController);
         verify(mDevicePostureController).addCallback(postureCallbackCaptor.capture());
 
         // GIVEN device is in AOD
@@ -466,24 +475,26 @@ public class DozeScreenBrightnessTest extends SysuiTestCase {
     }
 
     @Test
-    public void transitionToDoze_duringScreenOff_afterTimeout_clampsToDim() {
+    public void transitionToDoze_duringUnlockedScreenOff_afterTimeout_clampsToDim() {
         when(mWakefulnessLifecycle.getLastSleepReason()).thenReturn(
                 PowerManager.GO_TO_SLEEP_REASON_TIMEOUT);
         when(mDozeParameters.shouldControlUnlockedScreenOff()).thenReturn(true);
+        when(mUnlockedScreenOffAnimationController.isScreenOffAnimationPlaying()).thenReturn(true);
 
         mScreen.transitionTo(UNINITIALIZED, INITIALIZED);
         mScreen.transitionTo(INITIALIZED, DOZE);
 
         // If we're dozing after a timeout, and playing the unlocked screen animation, we should
-        // stay at dim brightness, because the screen dims just before timeout.
-        assertEquals(mServiceFake.screenBrightness, DIM_BRIGHTNESS);
+        // stay at or below dim brightness, because the screen dims just before timeout.
+        assertTrue(mServiceFake.screenBrightness <= DIM_BRIGHTNESS);
     }
 
     @Test
-    public void transitionToDoze_duringScreenOff_notAfterTimeout_doesNotClampToDim() {
+    public void transitionToDoze_duringUnlockedScreenOff_notAfterTimeout_doesNotClampToDim() {
         when(mWakefulnessLifecycle.getLastSleepReason()).thenReturn(
                 PowerManager.GO_TO_SLEEP_REASON_POWER_BUTTON);
         when(mDozeParameters.shouldControlUnlockedScreenOff()).thenReturn(true);
+        when(mUnlockedScreenOffAnimationController.isScreenOffAnimationPlaying()).thenReturn(true);
 
         mScreen.transitionTo(UNINITIALIZED, INITIALIZED);
         mScreen.transitionTo(INITIALIZED, DOZE);
@@ -494,10 +505,11 @@ public class DozeScreenBrightnessTest extends SysuiTestCase {
     }
 
     @Test
-    public void transitionToDoze_duringScreenOff_afterTimeout_noScreenOff_doesNotClampToDim() {
+    public void transitionToDoze_duringUnlockedScreenOff_afterTimeout_noScreenOff_doesNotClampToDim() {
         when(mWakefulnessLifecycle.getLastSleepReason()).thenReturn(
                 PowerManager.GO_TO_SLEEP_REASON_TIMEOUT);
         when(mDozeParameters.shouldControlUnlockedScreenOff()).thenReturn(false);
+        when(mUnlockedScreenOffAnimationController.isScreenOffAnimationPlaying()).thenReturn(false);
 
         mScreen.transitionTo(UNINITIALIZED, INITIALIZED);
         mScreen.transitionTo(INITIALIZED, DOZE);
@@ -506,6 +518,36 @@ public class DozeScreenBrightnessTest extends SysuiTestCase {
         assertEquals(mServiceFake.screenBrightness, DEFAULT_BRIGHTNESS);
     }
 
+    @Test
+    public void transitionToDoze_duringLockedScreenOff_afterTimeout_clampsToDim() {
+        when(mWakefulnessLifecycle.getLastSleepReason()).thenReturn(
+                PowerManager.GO_TO_SLEEP_REASON_TIMEOUT);
+        when(mWakefulnessLifecycle.getWakefulness()).thenReturn(
+                WakefulnessLifecycle.WAKEFULNESS_GOING_TO_SLEEP);
+        when(mDozeParameters.shouldControlUnlockedScreenOff()).thenReturn(false);
+        when(mUnlockedScreenOffAnimationController.isScreenOffAnimationPlaying()).thenReturn(false);
+
+        mScreen.transitionTo(UNINITIALIZED, INITIALIZED);
+        mScreen.transitionTo(INITIALIZED, DOZE);
+
+        assertTrue(mServiceFake.screenBrightness <= DIM_BRIGHTNESS);
+    }
+
+    @Test
+    public void transitionToDoze_duringLockedScreenOff_notAfterTimeout_doesNotClampToDim() {
+        when(mWakefulnessLifecycle.getLastSleepReason()).thenReturn(
+                PowerManager.GO_TO_SLEEP_REASON_POWER_BUTTON);
+        when(mWakefulnessLifecycle.getWakefulness()).thenReturn(
+                WakefulnessLifecycle.WAKEFULNESS_GOING_TO_SLEEP);
+        when(mDozeParameters.shouldControlUnlockedScreenOff()).thenReturn(false);
+        when(mUnlockedScreenOffAnimationController.isScreenOffAnimationPlaying()).thenReturn(false);
+
+        mScreen.transitionTo(UNINITIALIZED, INITIALIZED);
+        mScreen.transitionTo(INITIALIZED, DOZE);
+
+        assertEquals(mServiceFake.screenBrightness, DEFAULT_BRIGHTNESS);
+    }
+
     private void waitForSensorManager() {
         mFakeExecutor.runAllReady();
     }
diff --git a/packages/SystemUI/tests/src/com/android/systemui/doze/DozeScreenStateTest.java b/packages/SystemUI/tests/src/com/android/systemui/doze/DozeScreenStateTest.java
index 150ab7700e4be..3e19cc436dca6 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/doze/DozeScreenStateTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/doze/DozeScreenStateTest.java
@@ -82,6 +82,8 @@ public class DozeScreenStateTest extends SysuiTestCase {
     private UdfpsController mUdfpsController;
     @Mock
     private DozeLog mDozeLog;
+    @Mock
+    private DozeScreenBrightness mDozeScreenBrightness;
 
     @Before
     public void setUp() throws Exception {
@@ -96,7 +98,8 @@ public class DozeScreenStateTest extends SysuiTestCase {
         mHandlerFake = new FakeHandler(Looper.getMainLooper());
         mWakeLock = new WakeLockFake();
         mScreen = new DozeScreenState(mServiceFake, mHandlerFake, mDozeHost, mDozeParameters,
-                mWakeLock, mAuthController, mUdfpsControllerProvider, mDozeLog);
+                mWakeLock, mAuthController, mUdfpsControllerProvider, mDozeLog,
+                mDozeScreenBrightness);
     }
 
     @Test
diff --git a/services/core/java/com/android/server/display/DisplayPowerController.java b/services/core/java/com/android/server/display/DisplayPowerController.java
index 2f3342f20fcb7..22dd2c05c1578 100644
--- a/services/core/java/com/android/server/display/DisplayPowerController.java
+++ b/services/core/java/com/android/server/display/DisplayPowerController.java
@@ -108,8 +108,6 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
     // screen state returns.  Playing the animation can also be somewhat slow.
     private static final boolean USE_COLOR_FADE_ON_ANIMATION = false;
 
-    // The minimum reduction in brightness when dimmed.
-    private static final float SCREEN_DIM_MINIMUM_REDUCTION_FLOAT = 0.04f;
     private static final float SCREEN_ANIMATION_RATE_MINIMUM = 0.0f;
 
     private static final int COLOR_FADE_ON_ANIMATION_DURATION_MILLIS = 250;
@@ -200,6 +198,10 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
     // The dim screen brightness.
     private final float mScreenBrightnessDimConfig;
 
+    // The minimum dim amount to use if the screen brightness is already below
+    // mScreenBrightnessDimConfig.
+    private final float mScreenBrightnessMinimumDimAmount;
+
     private final float mScreenBrightnessDefault;
 
     // The minimum allowed brightness while in VR.
@@ -485,6 +487,9 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
                 pm.getBrightnessConstraint(PowerManager.BRIGHTNESS_CONSTRAINT_TYPE_DOZE));
         mScreenBrightnessDimConfig = clampAbsoluteBrightness(
                 pm.getBrightnessConstraint(PowerManager.BRIGHTNESS_CONSTRAINT_TYPE_DIM));
+        mScreenBrightnessMinimumDimAmount = resources.getFloat(
+                com.android.internal.R.dimen.config_screenBrightnessMinimumDimAmountFloat);
+
 
         // NORMAL SCREEN SETTINGS
         mScreenBrightnessDefault = clampAbsoluteBrightness(
@@ -1284,7 +1289,7 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
         if (mPowerRequest.policy == DisplayPowerRequest.POLICY_DIM) {
             if (brightnessState > PowerManager.BRIGHTNESS_MIN) {
                 brightnessState = Math.max(
-                        Math.min(brightnessState - SCREEN_DIM_MINIMUM_REDUCTION_FLOAT,
+                        Math.min(brightnessState - mScreenBrightnessMinimumDimAmount,
                                 mScreenBrightnessDimConfig),
                         PowerManager.BRIGHTNESS_MIN);
                 mBrightnessReasonTemp.addModifier(BrightnessReason.MODIFIER_DIMMED);