diff --git a/include/gui/SurfaceComposerClient.h b/include/gui/SurfaceComposerClient.h
index bae3886..581ec8d 100644
--- a/include/gui/SurfaceComposerClient.h
+++ b/include/gui/SurfaceComposerClient.h
@@ -67,6 +67,12 @@
     // Get information about a display
     static status_t getDisplayInfo(const sp<IBinder>& display, DisplayInfo* info);
 
+    /* triggers screen off and waits for it to complete */
+    static void blankDisplay(const sp<IBinder>& display);
+
+    /* triggers screen on and waits for it to complete */
+    static void unblankDisplay(const sp<IBinder>& display);
+
     // ------------------------------------------------------------------------
     // surface creation / destruction
 
diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index 4165d01..3efd086 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -552,6 +552,14 @@
     return ComposerService::getComposerService()->getDisplayInfo(display, info);
 }
 
+void SurfaceComposerClient::blankDisplay(const sp<IBinder>& token) {
+    ComposerService::getComposerService()->blank(token);
+}
+
+void SurfaceComposerClient::unblankDisplay(const sp<IBinder>& token) {
+    ComposerService::getComposerService()->unblank(token);
+}
+
 // ----------------------------------------------------------------------------
 
 ScreenshotClient::ScreenshotClient()