The present invention provides a reverse mode light valve containing ABX.sub.3 perovskite particles; more specifically is related to a light valve containing halide ABX.sub.3 perovskite particles that can control light transmittance. This light control valve has the property of higher light transmittance when the power is turned off (OFF state) and lower light transmittance when the power is turned on (ON state). In the halide ABX.sub.3 perovskite particles, A is at least one of Cs.sup.+, CH3NH3.sup.+, and Rb.sup.+, B is at least one of Pb.sup.2+, Ge.sup.2+, and Sn.sup.2+, and X is at least one of Cl.sup.−, Br.sup.−, and I.sup.−. This halide ABX.sub.3 perovskite particles were suspended in a liquid suspension to make a light valve with a light transmittance control. This light valve performs well and opens up a completely new field of application for ABX.sub.3 perovskite materials.

A display panel, a driving method thereof, and a display device are described. The display panel includes a first substrate and a second substrate opposite to each other, and a light transmission control layer located between the first substrate and the second substrate. The light transmission control layer includes a first electrode on a side of the first substrate facing the second substrate, a second electrode on a side of the second substrate facing the first substrate, a dispersant between the first electrode and the second electrode, and opaque flake dispersions dispersed in the dispersant. The first electrode and the second electrode are configured to form an electric field to control an arrangement state of the flake dispersions in the dispersant.

A display panel, a manufacturing method thereof and a display device are provided. The display panel includes an array substrate and a color filter substrate disposed oppositely. A light transmission medium layer is provided between the array substrate and the color filter substrate, the light transmission medium layer being made of graphene oxide.

A display panel, a manufacturing method thereof and a display device are provided. The display panel includes an array substrate and a color filter substrate disposed oppositely. A light transmission medium layer is provided between the array substrate and the color filter substrate, the light transmission medium layer being made of graphene oxide.

A display panel including a first substrate, a second substrate, a display medium layer and a sealant is provided. The second substrate is assembled with the first substrate. The display medium layer is disposed between the first substrate and the second substrate. The sealant is disposed between the first substrate and the second substrate, surrounds the display medium layer and includes a continuous one-piece pattern, wherein the continuous one-piece pattern includes a first segment and a second segment, and a difference between a width of the first segment and a width of the second segment is greater than or equal to a third of the width of the second segment.

A display panel including a first substrate, a second substrate, a display medium layer and a sealant is provided. The second substrate is assembled with the first substrate. The display medium layer is disposed between the first substrate and the second substrate. The sealant is disposed between the first substrate and the second substrate, surrounds the display medium layer and includes a continuous one-piece pattern, wherein the continuous one-piece pattern includes a first segment and a second segment, and a difference between a width of the first segment and a width of the second segment is greater than or equal to a third of the width of the second segment.

Thicknesses of a light control layer measured in multiple measurement positions are within the range of 0.8 times to 1.2 times the median value of the thicknesses. In a characteristic curve obtained by measuring a change in haze when a drive voltage applied to transparent electrode layers is changed, a first voltage is a lower limit drive voltage in the range in which the change ratio in haze is 0.5%/V or more, a second voltage is the upper limit drive voltage, and the middle value is a value between the first voltage and the second voltage. The variance in the middle value is 40% or less, in which the variance is obtained by dividing a difference between the minimum value and the maximum value, among middle values obtained from the characteristic curves in multiple measurement positions, by an average value of the middle values.

Thicknesses of a light control layer measured in multiple measurement positions are within the range of 0.8 times to 1.2 times the median value of the thicknesses. In a characteristic curve obtained by measuring a change in haze when a drive voltage applied to transparent electrode layers is changed, a first voltage is a lower limit drive voltage in the range in which the change ratio in haze is 0.5%/V or more, a second voltage is the upper limit drive voltage, and the middle value is a value between the first voltage and the second voltage. The variance in the middle value is 40% or less, in which the variance is obtained by dividing a difference between the minimum value and the maximum value, among middle values obtained from the characteristic curves in multiple measurement positions, by an average value of the middle values.

A light valve containing ABX.sub.3 perovskite particles (200) suspended in a liquid suspension (300) that can control light transmittance is provided. The preferable ABX.sub.3 perovskite particles (200) are halide ABX.sub.3 perovskite particles wherein A is at least one of Cs.sup.+, CH.sub.3NH.sub.3.sup.+, and Rb.sup.+, B is at least one of Pb.sup.2+, Ge.sup.2+, and Sn.sup.2+, and X is at least one of Cl.sup., Br.sup., and I.sup.. Use of the light valve in the manufacture of a light control device and a method of controlling light transmittance by using the light valve are also provided.

A light valve containing ABX.sub.3 perovskite particles (200) suspended in a liquid suspension (300) that can control light transmittance is provided. The preferable ABX.sub.3 perovskite particles (200) are halide ABX.sub.3 perovskite particles wherein A is at least one of Cs.sup.+, CH.sub.3NH.sub.3.sup.+, and Rb.sup.+, B is at least one of Pb.sup.2+, Ge.sup.2+, and Sn.sup.2+, and X is at least one of Cl.sup., Br.sup., and I.sup.. Use of the light valve in the manufacture of a light control device and a method of controlling light transmittance by using the light valve are also provided.