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Display device and television reception device

A display device and display period technology, applied in the direction of using solid-state color display device image reproducer, identification device, color TV, etc.

Inactive Publication Date: 2015-08-19
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, the display elements of image display devices headed by television receivers have gradually shifted from existing Braun tubes to thin display panels such as liquid crystal panels and plasma display panels, making it possible to reduce the thickness of image display devices

Method used

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  • Display device and television reception device
  • Display device and television reception device
  • Display device and television reception device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0072] according to Figure 1 to Figure 22 Embodiment 1 of the present invention will be described. In this embodiment, a liquid crystal display device 10 is exemplified. In addition, X-axis, Y-axis, and Z-axis are shown in some drawings, and each axis direction is drawn so that it may become the direction shown in each drawing. in addition, image 3 and Figure 7 The shown upper side is referred to as the front side, and the lower side in the figure is referred to as the rear side.

[0073] Such as figure 1 As shown, the television receiver TV of this embodiment is provided with a liquid crystal display device 10, two front and back cabinets Ca, Cb, a power supply P, a tuner T, and a pedestal S for sandwiching the liquid crystal display device 10. . The liquid crystal display device (display device) 10 has a horizontally long (long) square (rectangular) shape as a whole, and is housed in a vertical state. Such as figure 2 As shown, the liquid crystal display device ...

Embodiment approach 2

[0137] according to Figure 23 Embodiment 2 of the present invention will be described. In this Embodiment 2, the case where each pixel RPX, BPX, and GPX is not written but held in the second red and blue display period and the second green display period is shown. Note that redundant descriptions of the same configurations, actions, and effects as those of the first embodiment described above will be omitted.

[0138] In this embodiment, if Figure 23 As shown, the panel control unit (not shown) controls the liquid crystal panel 111 in the following manner: only the red pixel RPX and the blue pixel BPX are selectively driven during the first blue and red display period, and then the second blue and red pixel In the red display period, the red pixel RPX and the blue pixel BPX driven in the immediately preceding first blue and red display periods are held, and then, in the first green display period, only the green pixel GPX is selectively driven, and then In the second gree...

Embodiment approach 3

[0141] according to Figure 24 Embodiment 3 of the present invention will be described. In Embodiment 3, a case where PWM dimming driving and current amplitude dimming driving are used in combination is shown. Note that redundant descriptions of the same configurations, actions, and effects as those of the first embodiment described above will be omitted.

[0142] When the backlight control unit (not shown) of the present embodiment adjusts the brightness of each LED when the luminance (brightness) of the displayed image differs from frame to frame, not only the PWM described in the above-mentioned Embodiment 1 is performed, Dimming drive, and current amplitude dimming drive. The current amplitude dimming driving is a driving method of dimming and driving each LED by controlling the DC current value supplied to each LED.

[0143] Next, a specific method of combining PWM dimming driving and current amplitude dimming driving will be described. For example, when shifting from...

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Abstract

A liquid crystal display device, provided with: a liquid crystal panel having red pixels (RPX), blue pixels (BPX), and green pixels (GPX); a backlight device having a magenta LED and a green LED; a panel controller for controlling the liquid crystal panel so that a single frame display period includes a first red and blue display period and a second red and blue display period in which the red pixels (RPX) and the blue pixels (BPX) are driven, and a first green display period and a second green display period in which the green pixels (GPX) are driven; and a backlight controller for controlling a backlight so that the magenta LED and the green LED are illuminated in the first red and blue display period and the first green display period, only the magenta LED is illuminated in the second red and blue display period, and only the green LED is illuminated in the second green display period.

Description

technical field [0001] The present invention relates to a display device and a television receiver. Background technique [0002] In recent years, the display elements of image display devices such as television receivers have gradually shifted from existing Braun tubes to thin display panels such as liquid crystal panels and plasma display panels, making it possible to reduce the thickness of image display devices. The liquid crystal panel used in the liquid crystal display device does not emit light by itself, therefore, a backlight device is required as an illumination device separately, and a liquid crystal display device using an LED as the light source is known, and the following patent document 1 describes an example of such a liquid crystal display device . [0003] prior art literature [0004] patent documents [0005] Patent Document 1: JP-A-2010-113125 Contents of the invention [0006] The problem to be solved by the invention [0007] In the aforeme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G02F1/133G02F1/13357G09F9/00G09G3/20G09G3/34H04N9/30
CPCG09G2310/0235G09G2320/0242G09G3/3413G09F9/00G09G2300/0452G02F1/133602G02F1/133603G02B6/0068G02F1/133621G02F1/133613G02F1/133622G02F1/133614G02F1/133624G02F1/13306H04N9/3164
Inventor 细木满
Owner SHARP KK