Display panel and manufacturing method for the display panel

Abstract

To provide a display panel, such as a PDP, that can reduce noise caused by a collision sound which occurs when a front panel member and a back panel member vibrate while the display panel is being driven. Projections ( 21 ) are provided on a surface of a first panel member facing a second panel member. The first panel member and the second panel member are connected to each other by a connecting material in areas ( 23 ) where the projections intersect barrier ribs ( 18 ). In this way, noise (noise level) caused by a collision sound which occurs when the front panel member and the back panel member vibrate while the display panel is being driven can be reduced.

1 . A display panel including a first panel member and a second panel member which are set facing each other, wherein the first panel member has a first electrode, the second panel member has a second electrode, and an image is displayed according to a frame timesharing image display method by applying voltages to the first electrode and the second electrode, characterized in that 
 a noise level of noise in a frequency range of 20 Hz to 20 kHz, which occurs in a display area when the first panel member and the second panel member vibrate while the display panel is being driven, is no greater than 30 dB.    
     
     
         2 . A display panel including a first panel member and a second panel member which has a plurality of strip-shaped barrier ribs, the first panel member and the second panel member being sealed together by a sealing material that is provided between the first panel member and the second panel member in a peripheral area which surrounds the plurality of barrier ribs, characterized in that 
 the first panel member and the second panel member are connected to each other by a connecting material that is provided on top of at least one of the plurality of barrier ribs.    
     
     
         3 . A display panel including a first panel member and a second panel member which has a plurality of strip-shaped barrier ribs, the first panel member and the second panel member being sealed together by a sealing material that is provided between the first panel member and the second panel member in a peripheral area which surrounds the plurality of barrier ribs, characterized in that 
 the first panel member and the second panel member are connected to each other by a connecting material that is provided in a non-display area.    
     
     
         4 . A display panel including a first panel member and a second panel member which has a plurality of strip-shaped barrier ribs, the first panel member and the second panel member being sealed together by a sealing material that is provided between the first panel member and the second panel member in a peripheral area which surrounds the plurality of barrier ribs, characterized in that 
 a projection is formed on a surface of the first panel member facing the second panel member, and    the first panel member and the second panel member are connected to each other by a connecting material in areas where the projection intersects the plurality of barrier ribs.    
     
     
         5 . The display panel of  claim 4 , further including a plurality of light emission cells that are aligned with intervals, 
 wherein the projection is formed between adjacent light emission cells.    
     
     
         6 . The display panel of  claim 5 , 
 wherein the projection has a shape of a continuous strip that extends from one side of a display area to an opposite side of the display area so as to be orthogonal to the plurality of barrier ribs, the display area being defined by the alignment of the plurality of light emission cells.    
     
     
         7 . The display panel of  claim 5 , 
 wherein the projection has a shape of a plurality of dots.    
     
     
         8 . The display panel of  claim 5 , 
 wherein the projection is formed using a dark-color material.    
     
     
         9 . The display panel of  claim 5 , 
 wherein the first panel member has a dielectric layer, and    the projection is formed on the dielectric layer using a same material as the dielectric layer.    
     
     
         10 . The display panel of any of  claims 2  to  4 , 
 wherein a noise level of noise in a frequency range of 20 Hz to 20 kHz, which occurs in a display area when the first panel member and the second panel member vibrate while the display panel is being driven, is no greater than 30 dB.  
 
     
     
         11 . A manufacturing method for a display panel including a first panel member and a second panel member which has a plurality of strip-shaped barrier ribs, the first panel member and the second panel member being sealed together by a sealing material that is provided between the first panel member and the second panel member in a peripheral area which surrounds the plurality of barrier ribs, characterized by comprising the steps of: 
 providing, before the first panel member and the second panel member are sealed together, the sealing material in a peripheral area of the first panel member or the second panel member so as to form a height that is greater than a height of the plurality of barrier ribs; and    sealing, after the sealing material providing step, the first panel member and the second panel member by softening the sealing material while pressing the first panel member and the second panel member against each other in an area which is more central than the peripheral area.    
     
     
         12 . The manufacturing method of  claim 11 , 
 wherein in the sealing step, the first panel member and the second panel member are pressed against each other in a center area.    
     
     
         13 . The manufacturing method of  claim 11 , 
 wherein in the sealing step, the pressing is performed using a difference between a pressure inside the display panel and a pressure outside the display panel.    
     
     
         14 . The manufacturing method of  claim 11 , 
 wherein in the sealing step, the pressing is performed using a magnetic force between magnets of opposite polarity which are positioned so that the first panel member and the second panel member lie therebetween.    
     
     
         15 . The manufacturing method of  claim 11 , 
 wherein in the sealing material providing step, the sealing material is provided so as to form a height that is no smaller than a sum of the height of the plurality of barrier ribs and an amount of deflection, waviness, and warping of the first panel member and the second panel member.    
     
     
         16 . A display panel including a first panel member and a second panel member which has a plurality of strip-shaped barrier ribs, the first panel member and the second panel member being sealed together by a sealing material that is provided between the first panel member and the second panel member in a peripheral area which surrounds the plurality of barrier ribs, characterized by being manufactured by: 
 providing, before the first panel member and the second panel member are sealed together, the sealing material in a peripheral area of the first panel member or the second panel member so as to form a height that is greater than a height of the plurality of barrier ribs; and    sealing, after the sealing material is provided, the first panel member and the second panel member by softening the sealing material while pressing the first panel member and the second panel member against each other in an area which is more central than the peripheral area.    
     
     
         17 . The display panel of  claim 16 , 
 wherein a noise level of noise in a frequency range of 20 Hz to 20 kHz, which occurs in a display area when the first panel member and the second panel member vibrate while the display panel is being driven, is no greater than 30 dB.