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An electro-optic display comprises first and second substrates, and an adhesive layer and a layer of electro-optic material disposed between the first and second substrates. The adhesive layer has a volume resistivity in the range of about 109to about 1011ohm cm and comprises a mixture of an adhesiv

An electro-optic display comprises first and second substrates, and an adhesive layer and a layer of electro-optic material disposed between the first and second substrates. The adhesive layer has a volume resistivity in the range of about 109to about 1011ohm cm and comprises a mixture of an adhesive material having a volume resistivity of at least about 5×1011ohm cm and a filler having a volume resistivity not less than about 107ohm cm, the filler being present in the mixture in a proportion above its percolation threshold in the adhesive material.

대표청구항 ▼

1. An electro-optic display comprising first and second substrates, and an adhesive layer and a layer of electro-optic material disposed between the first and second substrates, the adhesive layer having a volume resistivity in the range of 109to 1011ohm cm and comprising a mixture of an adhesive ma

1. An electro-optic display comprising first and second substrates, and an adhesive layer and a layer of electro-optic material disposed between the first and second substrates, the adhesive layer having a volume resistivity in the range of 109to 1011ohm cm and comprising a mixture of an adhesive material having a volume resistivity of at least 5×1011ohm cm and a filler having a volume resistivity not less than 107ohm cm, the filler being present in the mixture in a proportion above its percolation threshold in the adhesive material. 2. An electro-optic display according to claim 1 wherein the adhesive material comprises a pressure sensitive adhesive. 3. An electro-optic display according to claim 2 wherein the pressure sensitive adhesive has a volume resistivity of from 1012to 1015ohm cm. 4. An electro-optic display according to claim 2 wherein the pressure sensitive adhesive is an acrylate, urethane or silicone-based pressure sensitive adhesive. 5. An electro-optic display according to claim 1 wherein the filler has a volume resistivity of from 108to 5×109ohm cm. 6. An electro-optic display according to claim 1 wherein the filler comprises any one or more of polyethylene glycol, a polyurethane polymer dispersion, an acrylate polymer, diamond, zirconium oxide, silicon carbide and sodium-doped glass. 7. An electro-optic display according to claim 1 wherein the filler comprises from 3 to 50 percent by weight of the adhesive layer. 8. An electro-optic display according to claim 1 wherein the electro-optic medium comprises a rotating bichromal member or electrochromic medium. 9. An electro-optic display according to claim 1 wherein the electro-optic medium comprises an electrophoretic medium comprising a plurality of capsules, each capsule comprising a capsule wall and an internal phase comprising electrically charged particles suspended in a suspending fluid and capable of moving through the fluid on application of an electric field to the electrophoretic medium. 10. An electro-optic display according to claim 9 further comprising a polymeric binder within which the capsules are held. 11. An electro-optic display according to claim 9 further comprising at least one electrode disposed between the electro-optic medium and one of the substrates, this electrode being arranged to apply an electric field to the electro-optic medium. 12. An electro-optic display according to claim 11 comprising two electrodes disposed on opposed sides of the electro-optic medium and between the electro-optic medium and the two substrates, at least one of the electrodes and the adjacent substrate being light-transmissive such that the electro-optic medium can be viewed through the light-transmissive substrate and electrode.