diff --git a/README.md b/README.md
index 200d587..eafefc6 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,4 @@ V4:
 2.配置
     地址，数值
     地址，数值
-
-
 ```
\ No newline at end of file
diff --git a/src/camera_light_src_timing_controller/clst_controler.cpp b/src/camera_light_src_timing_controller/clst_controler.cpp
index 1689890..b1f05c4 100644
--- a/src/camera_light_src_timing_controller/clst_controler.cpp
+++ b/src/camera_light_src_timing_controller/clst_controler.cpp
@@ -536,7 +536,18 @@ zaf_error_code_t CLSTControler::LightSrcX_setLightIntensityDuty(int32_t index, f
   uint32_t freqcnt = 0;
   DO_CMD(reg_read(kreg_light_ctrol_module1_light_driver_freq_cnt + (index - 1) * 32, freqcnt));
 
+  if (duty >= 99) {
+    duty = 99;
+  }
+
   uint32_t cnt = freqcnt * (duty / 100.0);
+  if (duty < 1) {
+    cnt = 1;
+  }
+  if (cnt >= freqcnt) {
+    cnt = freqcnt - 1;
+  }
+
   return reg_write(kreg_light_ctrol_module1_light_intensity_cnt + (index - 1) * 32, cnt);
 }
 zaf_error_code_t CLSTControler::LightSrcX_setLightDriverFreq(int32_t index, float freq) {  //