diff --git a/core/frontend/bigscreen/src/app/app.component.ts b/core/frontend/bigscreen/src/app/app.component.ts
index 3358909..219bfe8 100644
--- a/core/frontend/bigscreen/src/app/app.component.ts
+++ b/core/frontend/bigscreen/src/app/app.component.ts
@@ -140,6 +140,7 @@ export class BigscreenAppComponent implements OnInit, AfterViewInit, OnDestroy {
 
     this.focusOnStation(station);
     this.updateSummaryPanel();
+    this.reloadTileTimesAndShow();
     if (!auto) {
       this.scrollToTop();
     }
@@ -531,7 +532,14 @@ export class BigscreenAppComponent implements OnInit, AfterViewInit, OnDestroy {
 
   private async loadTileTimes(product: 'radar' | 'rain') {
     try {
-      const params = new URLSearchParams({ z: String(this.tileZ), y: String(this.tileY), x: String(this.tileX), limit: '60' });
+      const params = new URLSearchParams({ z: String(this.tileZ), y: String(this.tileY), x: String(this.tileX) });
+      const toFmt = (s: string) => s.replace('T', ' ') + ':00';
+      if (this.start && this.end) {
+        params.set('from', toFmt(this.start));
+        params.set('to', toFmt(this.end));
+      } else {
+        params.set('limit', '60');
+      }
       const path = product === 'rain' ? '/api/rain/times' : '/api/radar/times';
       const r = await fetch(`${path}?${params.toString()}`);
       if (!r.ok) return;
diff --git a/core/frontend/src/main.ts b/core/frontend/src/main.ts
index 14ffd2f..2cf2859 100644
--- a/core/frontend/src/main.ts
+++ b/core/frontend/src/main.ts
@@ -316,7 +316,15 @@ export class AppComponent implements OnInit, AfterViewInit {
 
   async loadTileTimes(product: 'radar'|'rain') {
     try {
-      const params = new URLSearchParams({ z: String(this.tileZ), y: String(this.tileY), x: String(this.tileX), limit: '60' });
+      const params = new URLSearchParams({ z: String(this.tileZ), y: String(this.tileY), x: String(this.tileX) });
+      // 若指定了开始/结束时间，则按时间范围查询；否则按最近limit条
+      const toFmt = (s: string) => s.replace('T',' ') + ':00';
+      if (this.start && this.end) {
+        params.set('from', toFmt(this.start));
+        params.set('to', toFmt(this.end));
+      } else {
+        params.set('limit', '60');
+      }
       const path = product==='rain' ? '/api/rain/times' : '/api/radar/times';
       const r = await fetch(`${path}?${params.toString()}`);
       if (!r.ok) return;