Liquid crystal display and manufacture thereof with electrostatic control of sprayed spacer particle deposition

A method for producing a liquid crystal display device

• comprising spraying spacers onto at least one of a first substrate comprising at least pattern-forming transparent electrodes, a conductive black matrix and an overcoat layer and a second substrate to be disposed opposingly above the first substrate
• and filling a liquid crystal into the space between both the substrates,
• wherein, in spraying positively or negatively charged spacers onto the substrate, a voltage (V1) is applied to the conductive black matrix and a voltage (V2) to the transparent electrodes,
• both the voltages V1 and V2 being positive ones and satisfying the relation V1<V2 when the spacer charge polarity is positive,
• or both V1 and V2 being negative voltages and satisfying the relation V1<V2 when the spacer charge polarity is negative, and the potential difference between V1 and V2 is not more than 100V.

A method for producing a liquid crystal display device

• comprising spraying spacers onto at least one of a first substrate comprising at least pattern-forming transparent electrodes, an alignment layer and one or more display areas and a second substrate to be disposed opposingly above the first substrate
• and filling a liquid crystal into the space between both the substrates,
• wherein, in spraying positively or negatively charged spacers onto the substrate, the substrate is disposed in close contact with an earthed conductive stage smaller in size than the substrate to thereby allow the peripheral edge portions thereof to be apart from the conductive stage
• and a voltage of the same polarity as the spacer charge polarity is applied to the transparent electrodes on the substrate to thereby prevent the decrease in the number of spacers disposed on the periphery of the substrate.

A method for producing a liquid crystal display device

• comprising spraying spacers onto at least one of a first substrate comprising at least pattern-forming transparent electrodes and an alignment layer and a second substrate to be disposed opposingly above the first substrate
• and filling a liquid crystal into the space between both the substrates,
• and comprising the step of removing moisture from the substrate onto which spacers are to be sprayed,
• the step of disposing the substrate into close contact with an earthed conductive stage and then spraying spacers while applying a voltage of the same polarity as the spacer charge polarity to the transparent electrodes on the substrate to thereby improve the precision of selective spacer positioning in a space of the transparent electrodes
• wherein, upon application of a voltage of 1 kV to the transparent electrodes on the substrate after completion of the step of removing moisture, the current flowing between the transparent electrodes on the substrate and the conductive stage is not more than 10−6 A.

A method for producing a liquid crystal display device

• comprising spraying spacers onto at least one of a first substrate comprising at least pattern-forming transparent electrodes and an alignment layer and a second substrate to be disposed opposingly above the first substrate
• and filling a liquid crystal into the space between both the substrates,
• wherein, in spraying positively or negatively charged spacers onto the substrate, the substrate is disposed in close contact with an earthed conductive stage,
• a voltage of the same polarity as the spacer charge polarity is applied to the transparent electrodes on the substrate,
• then the terminals of the voltage application apparatus are disconnected from the transparent electrodes
• and spacer spraying is carried out while the electric charge remains on the substrate.

A method for producing a liquid crystal display device

• comprising spraying spacers onto at least one of a first substrate comprising at least pattern-forming transparent electrode and an alignment layer and a second substrate to be disposed opposingly above the first substrate
• and filling a liquid crystal into the space between both the substrates,
• wherein, in spraying positively or negatively charged spacers onto the substrate,
• the substrate is disposed in close contact with an earthed conductive stage,
• a voltage of the same polarity as the spacer charge polarity is applied to the transparent electrodes on the substrate while maintaining that state of voltage application for a certain period of time,
• and then spacer spraying is carried out while maintaining that state of voltage application.

A method for producing a liquid crystal display device

• comprising spraying spacers onto a first substrate comprising at least pattern-forming transparent electrodes, a conductive black matrix, an overcoat layer and an alignment layer, and filling a liquid crystal into the space between the first substrate and a second substrate comprising thin film transistors formed thereon which is to be disposed opposingly above the first substrate,
• wherein the first substrate has transparent electrode-free etched regions formed within the transparent electrodes over and within the expanse of the corresponding conductive black matrix areas,
• and, in spraying positively or negatively charged spacers onto the first substrate, a voltage (V1) is applied to the conductive black matrix and a voltage (V2) to the transparent electrodes,
• both the voltages V1 and V2 being positive ones and satisfying the relation V1<V2 when the spacer charge polarity is positive,
• or both V1 and V2 being negative voltages and satisfying the relation V1>V2 when the spacer charge polarity is negative, and the potential difference between V1 and V2 is not more than 100V.

A method for producing a liquid crystal display device

• comprising spraying spacers onto a first substrate comprising at least pattern-forming transparent electrodes, and filling a liquid crystal into the space between the first substrate and a second substrate comprising thin film transistors formed thereon which is to be disposed opposingly above the first substrate,
• wherein the first substrate has isolated, electrically floating, transparent electrodes not connected with the surrounding transparent electrodes but formed within the transparent electrodes within the expanse of the corresponding black matrix areas as formed on the first or second substrate,
• and, in spraying positively or negatively charged spacers onto the first substrate, the first substrate is disposed in close contact with an earthed conductive stage having a volume resistance of not more than 1010 Ωcm
• and a voltage of the same polarity as the spacer charge polarity is applied to the transparent electrodes other than the isolated transparent electrodes on the first substrate.