Composite pane having electrically controllable optical properties

A composite pane with electrically controllable optical properties, comprising:

• an outer pane and an inner pane that are joined to one another areally via an intermediate layer;
• an electrochromic functional element with electrically controllable optical properties within the intermediate layer, wherein a total solar energy transmittance TTS in a darkened state of the electrochromic functional element is higher than in a bright state of the electrochromic functional element and/or an energy transmittance TE in the darkened state is higher than in the bright state;
• and
• an infrared protection layer which has at least one silver-containing layer and is applied or arranged on an interior-side surface of the inner pane facing the intermediate layer, on an interior-side surface of the outer pane facing the intermediate layer, or within the intermediate layer, which infrared protection layer interacts with the electrochromic functional element such that the total solar energy transmittance TTS through the composite pane in the darkened state is lower than in the bright state and/or the energy transmittance TE through the composite pane in the darkened state is lower than in the bright state,
• wherein a light transmittance TL through the composite pane in the bright state of the electrochromic functional element is greater than or equal to 20%, and
• wherein the light transmittance TL through the composite pane in the darkened state of the electrochromic functional element is lower than or equal to 15%.