diff --git a/radio/src/targets/taranis/lcd_driver.cpp b/radio/src/targets/taranis/lcd_driver.cpp
index a7eaf8e98..7c5cfb2ba 100644
--- a/radio/src/targets/taranis/lcd_driver.cpp
+++ b/radio/src/targets/taranis/lcd_driver.cpp
@@ -239,7 +239,7 @@ static void LCD_BL_Config()
 
   RCC->APB1ENR |= RCC_APB1ENR_TIM4EN ;        // Enable clock
   TIM4->ARR = 100 ;
-  TIM4->PSC = (PERI1_FREQUENCY * TIMER_MULT_APB1) / 10000 - 1;
+  TIM4->PSC = (PERI1_FREQUENCY * TIMER_MULT_APB1) / 50000 - 1;  // 20us * 100 = 2ms => 500Hz
   TIM4->CCMR1 = TIM_CCMR1_OC2M_1 | TIM_CCMR1_OC2M_2 ; // PWM
   TIM4->CCMR2 = TIM_CCMR2_OC4M_1 | TIM_CCMR2_OC4M_2 ; // PWM
   TIM4->CCER = TIM_CCER_CC4E | TIM_CCER_CC2E ;
@@ -258,7 +258,7 @@ static void LCD_BL_Config()
 
   RCC->APB2ENR |= RCC_APB2ENR_TIM10EN ;        // Enable clock
   TIM10->ARR = 100 ;
-  TIM10->PSC = (PERI2_FREQUENCY * TIMER_MULT_APB2) / 10000 - 1;
+  TIM10->PSC = (PERI2_FREQUENCY * TIMER_MULT_APB2) / 50000 - 1;  // 20us * 100 = 2ms => 500Hz
   TIM10->CCMR1 = 0x60 ;    // PWM
   TIM10->CCER = 1 ;
   TIM10->CCR1 = 80;