diff --git a/os/board/rtl8730e/src/rtl8730e_mipi_lcdc.c b/os/board/rtl8730e/src/rtl8730e_mipi_lcdc.c
index a21a5110bc..0ecd52b0ed 100644
--- a/os/board/rtl8730e/src/rtl8730e_mipi_lcdc.c
+++ b/os/board/rtl8730e/src/rtl8730e_mipi_lcdc.c
@@ -81,6 +81,7 @@ struct irq {
 	u32 num;
 	u32 data;
 	u32 priority;
+	bool disable_isr;
 };
 
 LCDC_TypeDef *pLCDC = LCDC;
@@ -93,6 +94,7 @@ struct irq lcdc_irq_info = {
 	.num = LCDC_IRQ,
 	.data = (u32) LCDC,
 	.priority = INT_PRI_HIGH,
+	.disable_isr = 0,
 };
 
 extern struct irq mipi_irq_info;
@@ -206,6 +208,13 @@ static void rtl8730e_control_backlight(uint8_t level)
 	lcdvdbg("level :%d , pwm level:%f\n", level, pwm_level);
 #if defined(CONFIG_LCD_ST7785) || defined(CONFIG_LCD_ST7701SN)
 	pwmout_write(&g_rtl8730e_config_dev_s.pwm_led, 1.0-pwm_level);
+	if (level == 0 && !(lcdc_irq_info.disable_isr)) {
+		InterruptDis(lcdc_irq_info.num);
+		lcdc_irq_info.disable_isr = 1;
+	} else if (level != 0 && lcdc_irq_info.disable_isr) {
+		InterruptEn(lcdc_irq_info.num, lcdc_irq_info.priority);
+		lcdc_irq_info.disable_isr = 0;
+	}
 #endif
 }