Browse Prior Art Database

Multicolor Interfacial Control Display Panel

IP.com Disclosure Number: IPCOM000074044D
Original Publication Date: 1971-Mar-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 75K

Publishing Venue

IBM

Related People

Magill, PJ: AUTHOR [+3]

Abstract

This display panel combines fluidic technology with a liquid crystal panel to provide color displays of input/output functions of a computer. One section of the display panel, as shown, comprises a temperature sensitive liquid crystal sheet 7 overlying a compressible multi-channel panel 8 containing arrays of fine tubes A1 and A2, interconnected in the manner shown, and communicating with sources 1 and 2 containing pressurized gas; the temperature T2 of source 2 being less than T1, the temperature of source 1. T2 is the temperature of the gas in the pressure sensing line. T2 also serves as the reference temperature, i.e., with gas from source 2 flowing and gas from source 1 turned off, the color of the liquid crystal panel 7 is black.

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Multicolor Interfacial Control Display Panel

This display panel combines fluidic technology with a liquid crystal panel to provide color displays of input/output functions of a computer. One section of the display panel, as shown, comprises a temperature sensitive liquid crystal sheet 7 overlying a compressible multi-channel panel 8 containing arrays of fine tubes A1 and A2, interconnected in the manner shown, and communicating with sources 1 and 2 containing pressurized gas; the temperature T2 of source 2 being less than T1, the temperature of source 1. T2 is the temperature of the gas in the pressure sensing line. T2 also serves as the reference temperature, i.e., with gas from source 2 flowing and gas from source 1 turned off, the color of the liquid crystal panel 7 is black.

Under normal conditions without any pressure on the display panel, the pressurized gas from the source 1 flows through the array A1 by way of a path including channel C1, a multivibrator MV, channel C2, channel C3 and output channel C5. The multivibrator is normally set to operate with a fixed duty cycle so that the gas flows through the array A1 a fixed percentage of a given cycle interval. During the remaining part of the cycle, the gas bypasses the array A1 by virtue of the fact that the multivibrator interconnects the channel C1 with the bypass channel C4 interconnected to the channel C5. The low temperature source 2 communicates with the array A2 by way of a closed path comprised of channels C10 and C11, the latter including a liquid flow sensor FS. Under normal conditions (in the absence of pressure on the channel), the gas flow is at a constant rate through the array A2. The output of the senso...